Anti-seepage structure, connecting structure and construction method

Abstract

The invention discloses an anti-seepage structure, a connecting structure and a construction method. The first waterproof structure comprises a first cushion layer, a waterproof layer and a bottom plate structure which are laminated from bottom to top; the second waterproof structure comprises a second cushion layer, a waterproof roll layer and a flexible connecting layer which are arranged from bottom to top; the second cushion layer comprises a concave part, and the second cushion layer is connected with the first cushion layer through the concave part; the waterproof roll layer is distributed along the upper surface of the second cushion layer in an extending mode, a reserved groove is formed in the concave portion, and the free end edge in the reserved groove is connected with the end edge of the waterproof layer or extends towards the existing area at the lower portion of the bottom plate structure by a first preset length; the flexible connecting layer comprises a filling part and an interlayer connecting part; the reserved groove is filled with the filling part, and at least part of the filling part is connected with the waterproof layer at the height equal to or higher than the waterproof layer; the interlayer connecting part at least extends into a whole along the surface or interlayer of the waterproof layer; the waterproof curtain comprises a first curtain extending from the lower portion of the reserved ditch to the lower portion of the first cushion layer.

Description

Technical Field

[0001] The present application belongs to the technical field of building waterproof construction, and in particular relates to an anti-leakage structure, a connection structure and a construction method. Background Art

[0002] For various unfinished buildings or buildings that need to continue construction of later projects, because the existing building structure has been stopped for too long, there are many problems with the original waterproof layer of the existing bottom slab concrete structure: for example, the existing waterproof layer can no longer be found, or the waterproof membrane laid under the existing bottom slab concrete structure is seriously aged. This brings great difficulties to the subsequent construction of the construction project, especially for the waterproof membrane of the existing bottom slab concrete structure and the new waterproof membrane of the continued construction part, which is difficult to effectively overlap for waterproofing. In addition, the construction joints of the joints of the new and old concrete cannot be waterproofed with structural measures such as waterstops, resulting in the flexible waterproof layer and the rigid waterproof dual anti-leakage measures being unable to work together for waterproofing, and the probability of leakage is high, and the conventional grouting method cannot solve the leakage problem. In addition, there is also the problem that the material of the waterproof membrane of the existing bottom slab concrete structure and the new waterproof membrane of the continued construction part are different, and the waterproof membrane cannot be effectively overlapped, resulting in the problem of waterproof structure leakage in the existing structure and the new structure. Summary of the invention

[0003] The embodiments of the present application provide an anti-leakage structure, a connection structure and a construction method, which are used to seal the leakage parts of the existing building structure along a pre-set path, and cooperate with the first curtain of the water-stop curtain to form a multi-dimensional and complete waterproof layer to prevent leakage between the existing structure and the newly built structure.

[0004] In a first aspect, the present application provides an anti-leakage structure having an existing area and a newly-built area successively distributed along a horizontal plane, the anti-leakage structure comprising: a first waterproof structure, which is an existing waterproof structure of an existing building structure and is distributed corresponding to the existing area; the first waterproof structure comprises a first cushion layer, a waterproof layer and a bottom plate structure stacked from bottom to top in a vertical direction perpendicular to the horizontal plane; a second waterproof structure is constructed corresponding to the newly-built area and is sealed and connected to the first waterproof structure to form a waterproof integrated structure; the second waterproof structure comprises a second cushion layer, a waterproof roll layer and a flexible connection layer arranged from bottom to top in a vertical direction; the second cushion layer comprises a recessed portion sunken downward, and the second cushion layer is connected to the first cushion layer through the recessed portion; the waterproof roll layer is arranged along the upper surface of the second cushion layer The surface is extended and distributed, and a reserved groove is formed in the concave part, the free end edge of the waterproof membrane layer in the reserved groove is connected to the end edge of the waterproof layer, or the free end edge of the waterproof membrane layer in the reserved groove is at the lower part of the base plate structure and extends toward the existing area to set a first preset length; the flexible connecting layer includes a filling part and an interlayer connecting part that are integrally connected; the filling part fills the reserved groove, and at least a part of the filling part is connected to the waterproof layer at a height equal to or higher than the waterproof layer, and the interlayer connecting part at least extends along the surface of the waterproof layer or between layers to be integrated; or the interlayer connecting part is extended between the waterproof membrane layer and the base plate structure at least along the first preset length; the water-stop curtain includes a first curtain extending from the lower part of the second cushion layer corresponding to the reserved groove to the lower part of the first cushion layer.

[0005] In an embodiment of the first aspect, the free end of the waterproof membrane layer in the reserved groove is edged at the lower portion of the base plate structure, extends toward the existing area and covers at least a portion of the first cushion layer by a first preset length.

[0006] In an embodiment of the first aspect, the first waterproof structure further includes a waterproof protective layer, and the waterproof protective layer is located between the waterproof layer and the bottom plate structure.

[0007] In an embodiment of the first aspect, the filling portion is inclined downward from the first waterproof structure to the second waterproof structure.

[0008] In an embodiment of the first aspect, the filling part includes an upper end and a lower end; the upper end is arranged between the waterproof layer and the base plate structure, and the lower end is arranged in the reserved groove and between the part of the waterproof membrane layer that is higher than the reserved groove and covers the newly built area.

[0009] In an embodiment of the first aspect, the height of the top of the reserved ditch at one end of the newly built area is higher than the height of the reserved ditch at one end of the existing area. The filling portion slopes downward from the second waterproof structure to the first waterproof structure.

[0010] In an embodiment of the first aspect, the filling portion includes an upper end and a lower end; the lower end is arranged between the waterproof layer and the base plate structure, and the upper end is connected to the waterproof membrane layer at least in the reserved groove at a height higher than the lower end.

[0011] In an embodiment of the first aspect, the water-stop curtain also includes a second curtain continuously arranged in an area from the lower part of the second cushion layer corresponding to the reserved groove to the lower part of the newly built structure part.

[0012] In an embodiment of the first aspect, the waterproof membrane layer is formed by laying a self-adhesive pre-laid waterproof membrane.

[0013] In a second aspect, the present application provides a construction method for an anti-seepage structure, comprising: forming a first recessed reserved groove in the foundation of the lower part of the base plate structure from the existing area to the newly built area along a horizontal plane; constructing a second cushion layer from the first cushion layer, through the upper surface of the first reserved groove to the newly built area, to form a recess; laying a waterproof roll material layer from the waterproof layer or in the existing area extending into the lower part of the base plate structure for a first preset length, through the upper surface of the recess to the newly built area, to form a reserved groove; forming a filling portion in the reserved groove, so that at least part of the filling portion is connected to the waterproof layer at a height equal to or higher than the waterproof layer, or is connected to the base plate structure at the first preset length of the waterproof roll material layer; using a flexible grouting material to infiltrate the filling portion and at least penetrate into the waterproof layer or the first preset length of the waterproof roll material layer to the base plate structure to form a sealed connection between the waterproof layer or the interlayer connection portion connected to the base plate structure; the interlayer connection portion is integrally connected to the filling portion to form a flexible connection layer; forming a first curtain of a water-stop curtain in the area below the second cushion layer corresponding to the first cushion layer and the reserved groove.

[0014] In an embodiment of the second aspect, a waterproof membrane layer is laid from the waterproof layer or in an existing area, extending into the lower part of the base structure and covering at least a portion of the first cushion layer by a first preset length, through the upper surface of the recessed portion to the newly constructed area.

[0015] In an embodiment of the second aspect, a first curtain of water-stopping curtain is formed in the area below the second cushion layer corresponding to the first cushion layer and the reserved groove, including: grouting holes are arranged at intervals along the direction from the new area to the existing area of ​​the bottom plate structure and along the length direction of the cross-section of the bottom plate structure, grouting holes are drilled from the bottom plate structure into the foundation, and curtain grouting pipes are arranged in the grouting holes; curtain grouting material is poured through the curtain grouting pipe to form the first curtain of water-stopping curtain in the area below the second cushion layer corresponding to the first cushion layer and the reserved groove.

[0016] In an embodiment of the second aspect, the grouting holes are arranged in rows, and any two adjacent rows of grouting holes are arranged in a staggered manner.

[0017] In an embodiment of the second aspect, a grouting hole is drilled on the upper surface of the bottom plate structure from the bottom plate structure to the foundation. Alternatively, a grouting hole is drilled on the cross-section of the bottom plate structure from the bottom plate structure to the foundation, so that the grouting hole forms a first preset angle with the first cushion layer. α , the first preset angle α Satisfy 10°≤α <90°.

[0018] In an embodiment of the second aspect, a filling portion is formed in a reserved groove, and a flexible grouting material is used to infiltrate the filling portion, including: a first transverse grouting pipe is arranged on the upper part of the waterproof membrane layer in the reserved groove along the length direction of the bottom plate structure cross-section portion, and a first vertical grouting pipe connected to the first transverse grouting pipe is arranged at intervals; the first transverse grouting pipe and at least a part of the first vertical grouting pipe are buried in backfill soil to form a filling portion; and a flexible grouting material is poured into the filling portion through the first vertical grouting pipe and the first transverse grouting pipe to infiltrate the filling portion with the flexible grouting material.

[0019] In an embodiment of the second aspect, a filling portion is formed in a reserved trench, and the filling portion is infiltrated with a flexible grouting material, including: filling the reserved trench with backfill soil to form the filling portion, and pouring the flexible grouting material into the filling portion using a formwork method.

[0020] In an embodiment of the second aspect, forming a filling portion in the reserved groove includes: making the filling portion tilt downward from the first waterproof structure to the second waterproof structure.

[0021] In an embodiment of the second aspect, the filling portion includes an upper end and a lower end; the filling portion is tilted downward from the first waterproof structure to the second waterproof structure, including: the upper end is set between the waterproof layer and the bottom plate structure, and the lower end is set in the reserved groove and between the part of the waterproof membrane layer that is higher than the reserved groove and covers the newly built area.

[0022] In an embodiment of the second aspect, forming a filling portion in the reserved groove includes: a height of the top of the reserved groove at one end of the newly constructed area is higher than a height of the reserved groove at one end of the existing area.

[0023] In an embodiment of the second aspect, the filling portion includes an upper end and a lower end; and the filling portion is inclined downward from the second waterproof structure to the first waterproof structure.

[0024] In an embodiment of the second aspect, the lower end is arranged between the waterproof layer and the base plate structure, and the upper end is arranged at least in the reserved groove to be higher than the waterproof membrane layer of the lower end.

[0025] In an embodiment of the second aspect, the anti-leakage structure construction method also includes: before constructing the second cushion layer or during the construction of the second cushion layer, a third vertical grouting pipe is arranged at intervals along the length direction of the bottom plate structure cross-section portion and from the lower part of the second cushion layer of the newly built structure portion; curtain grouting material is poured into the lower part of the second cushion layer through the third vertical grouting pipe to form a second curtain of the water-stop curtain continuously arranged from the lower part of the second cushion layer corresponding to the reserved groove to the newly built structure.

[0026] In an embodiment of the second aspect, the anti-seepage structure construction method also includes: cleaning the backfill soil above the base plate structure and performing slope reduction processing to form a downward sloping backfill soil slope in the direction from the existing area to the newly built area.

[0027] On the third aspect, an embodiment of the present application provides a connection structure, including: the above-mentioned anti-leakage structure; and a post-cast strip, which covers at least a portion of the waterproof membrane layer along the direction from the existing area to the newly built area, and the post-cast strip covers the filling portion and is connected to the base plate structure; a newly built base plate extends along the direction from the existing area to the newly built area to cover the waterproof membrane layer not covered by the post-cast strip, and is connected to the post-cast strip.

[0028] In an embodiment of the third aspect, the post-cast strip is provided with connecting steel bars extending into the base plate structure.

[0029] In an embodiment of the third aspect, a cement-based crystalline waterproof coating layer is provided at the cross-sectional portion where the base plate structure is connected to the post-cast strip.

[0030] In an embodiment of the third aspect, a resin slurry is used to seal the connection between the base plate structure and the post-cast strip.

[0031] In an embodiment of the third aspect, an embedded water-stop steel plate is arranged between the post-cast strip and the newly-built base plate.

[0032] In an embodiment of the third aspect, an external waterstop is provided between the lower part of the connection between the post-cast strip and the newly built base plate and the waterproof membrane layer.

[0033] In a fourth aspect, the present application provides a construction method for a connecting structure, including: the construction method of the above-mentioned anti-leakage structure; and setting a post-cast strip area between the existing area and the newly-built area; forming bottom plate steel bars in the newly-built area; constructing to wrap the bottom plate steel bars inside to form a newly-built bottom plate; constructing to wrap the filling part in the post-cast strip area to form a post-cast strip connected to the bottom plate structure and the newly-built bottom plate.

[0034] In an embodiment of the fourth aspect, the construction method of the connection structure further includes: drilling reinforcing bar holes from a cross-sectional portion of the bottom plate structure into the bottom plate structure, and setting connecting steel bars in the reinforcing bar holes.

[0035] In an embodiment of the fourth aspect, the construction method of the connection structure further includes: roughening the cross-sectional portion of the base plate structure so that the cross-sectional portion of the base plate structure has a rough surface.

[0036] In an embodiment of the fourth aspect, the construction method of the connecting structure also includes: coating a cement-based penetrating crystalline waterproof coating on a section portion of the base plate structure having a rough surface to form a cement-based penetrating crystalline waterproof coating layer of a preset thickness.

[0037] In an embodiment of the fourth aspect, the construction method of the connection structure also includes: fixedly connecting the first vertical grouting pipe to the connecting steel bar.

[0038] In an embodiment of the fourth aspect, the construction method of the connecting structure also includes: setting a second transverse grouting pipe from the lower part to the middle part in the thickness direction of the base plate structure and along the length direction of the cross-sectional part of the base plate structure, and setting a second vertical grouting pipe connected to the second transverse grouting pipe at intervals, and fixing the second vertical grouting pipe to the connecting steel bar; pouring resin slurry between the base plate structure and the post-cast strip through the second vertical grouting pipe and the second transverse grouting pipe to seal the construction joint between the base plate structure and the post-cast strip.

[0039] In an embodiment of the fourth aspect, the construction method of the connection structure also includes: setting an external waterstop strip between the lower part of the connection between the post-cast strip and the newly built base plate structure and the waterproof membrane layer.

[0040] In an embodiment of the fourth aspect, the construction method of the connection structure further includes: setting an embedded water-stop steel plate between the post-cast strip and the newly built base plate.

[0041] In an embodiment of the fourth aspect, the construction method of the connection structure further includes: pre-embedding a third vertical grouting pipe from the lower part of the second cushion layer to the bottom plate steel bars.

[0042] The anti-leakage structure of the embodiment of the present application adopts a multi-dimensional waterproof processing method, pre-sets a reserved groove in the broken part of the bottom plate structure, fills the reserved groove with a filling part, and is connected to the filling part and mixed with the surface or interlayer of the waterproof layer, or at least extends along the first preset length between the waterproof coiled material layer and the bottom plate structure to form a flexible connection layer. The interlayer connection part with a sealed connection is formed, and the flexible connection layer connects the waterproof layer or the bottom plate structure and the waterproof coiled material layer to form a complete waterproof structure layer, which can block the leakage part of the existing building structure along the pre-leakage path to prevent the leakage water from entering the upper part of the waterproof layer along the waterproof layer. At the same time, the soil under the existing area and the newly built area is solidified, that is, a continuous first curtain of water-stopping curtain is formed between the lower part of the second cushion layer and the lower part of the first cushion layer corresponding to the reserved groove, preventing the leakage water from leaking along the gap between the existing building structure and the structure of the newly built area to the connection between the waterproof layer and the waterproof coiled material layer, further improving the anti-leakage effect. The present application forms a complete waterproof structural layer that cooperates with each other through the flexible connecting layer and the water-stop curtain of the first curtain, which effectively prevents groundwater from leaking into the existing building structure and the newly built structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] In order to more clearly illustrate the technical solution of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0044] Figure 1 It is a schematic diagram of the process of the construction method of the connection structure of Example 2.

[0045] Figure 2 It is a schematic diagram of the distribution of grouting holes on the upper surface of the base plate structure in the construction method of the connection structure of Example 2.

[0046] Figure 3 Schematic diagram of the cross-section of the connection structure of Example 1.

[0047] Figure 4 It is a schematic cross-sectional view of the connection structure of Example 3.

[0048] Figure 5 It is a schematic diagram of the process of the construction method of the connection structure of Example 5.

[0049] Figure 6 It is a schematic diagram of the distribution of grouting holes in the cross-section of the base plate structure in the construction method of the connection structure of Example 5.

[0050] Figure 7 It is a schematic cross-sectional view of the connection structure of Example 5.

[0051] Figure 1 , 3 -5 and 7, the black dot represents the length direction Z of the cross-section of the bottom plate structure, which is perpendicular to the corresponding view from outside to inside or from inside to outside. Figure 2 The black dots in the middle represent the thickness direction T of the floor structure. Figure 6 The black dot in the middle indicates the direction X from the newly built area to the existing area.

[0052] Explanation of the reference numerals: 17, foundation; 100, first reserved ditch; 1, first waterproof structure; 2 existing area; 21, first cushion layer; 22, waterproof layer; 23, waterproof protective layer; 24, bottom plate structure; 24a, cross-section; 25, grouting hole; 26, curtain grouting pipe; 3, second waterproof structure; 31, second cushion layer; 31a, recess; 32, waterproof membrane layer; 33, reserved ditch; 34, flexible connection layer; 34a, filling part; 34a1, upper end; 34a2, lower end; 34b, interlayer connection; 35, first horizontal grouting pipe; 36, first vertical grouting pipe; 4, water-stop curtain; 41, first curtain; 42, first Second curtain; 5. Newly constructed area; 50. Newly constructed bottom plate; 51. Third vertical grouting pipe; 6. Post-cast joint; 61. Second horizontal grouting pipe; 62. Second vertical grouting pipe; 7. Connecting steel bars; 8. Embedded waterstop steel plate; 9. External waterstop; 19. Backfill soil layer; 20. Existing protective layer; Z, length direction of the bottom plate structure section; X, direction from the newly constructed area to the existing area; Y, direction from the existing area to the newly constructed area; T, thickness direction of the bottom plate structure; d0, minimum distance from the grouting hole to the bottom plate structure section; d1, spacing of the grouting holes along the direction X from the newly constructed area to the existing area or along the length direction Z of the bottom plate structure section. DETAILED DESCRIPTION

[0053] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the purpose, technical solutions and advantages of the present application more clear, the present application will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The following description of the embodiments is only intended to provide a better understanding of the present application by showing examples of the present application.

[0054] As described in the background technology section, conventional grouting can only solve the problem of water seepage in structural cracks, and the quality of grouting in structural cracks to prevent water seepage needs to be verified. The inventor of the present application found that the waterproof structure of the existing structural part is in a broken state, and the gaps between the existing waterproof layer (i.e., the existing rolled waterproof layer) and the existing waterproof protective layer, and the waterproof protective layer and the existing bottom plate structure (i.e., the existing concrete bottom plate structure) are all naturally open. Groundwater can directly enter the upper part of the waterproof layer along these openings, causing the waterproof structure of the existing structural part to fail. If the newly built structural part also adopts the traditional waterproof construction method, that is, from bottom to top, a new structural part including a new concrete cushion layer, a new waterproof layer, a new waterproof protective layer, and a new bottom plate structure is formed in sequence, the new structure will also have a broken problem, and groundwater will enter the newly built waterproof layer, causing the waterproof layer of the newly built structural part to fail, and then enter the structural cracks between the existing structure and the newly built structure and even indoors from the waterproof layer, causing leakage problems.

[0055] In order to solve the problems of the prior art, the embodiments of the present application provide an anti-leakage structure, a connection structure and their respective construction methods.

[0056] like Figure 3 The embodiment of the present application provides an anti-leakage structure, which has a newly built area 5 and an existing area 2 successively distributed along a horizontal plane, and the anti-leakage structure includes: a first waterproof structure 1, which is an existing waterproof structure of an existing building structure, and is distributed corresponding to the existing area 2; the first waterproof structure 1 includes a first cushion layer 21, a waterproof layer 22 and a bottom plate structure 24 stacked from bottom to top in a vertical direction perpendicular to the horizontal plane; a second waterproof structure 3 is constructed corresponding to the newly built area 5 and is sealed and connected to the first waterproof structure 1 to form a waterproof integrated structure; the second waterproof structure 3 includes a second cushion layer 31, a waterproof roll layer 32 and a flexible connection layer 34 arranged from bottom to top in a vertical direction; the second cushion layer 31 includes a recessed portion 31a sunken downward, and the second cushion layer 31 is connected to the first cushion layer 21 through the recessed portion 31a; the waterproof roll layer 32 is extended and distributed along the upper surface of the second cushion layer 31, A reserved groove 33 is formed in the recessed portion 31a, and the free end edge of the reserved groove 33 is connected to the end edge of the waterproof layer 22, or the free end edge of the waterproof roll material layer 32 in the reserved groove 33 is at the lower part of the bottom plate structure 24 and extends toward the existing area 2 to set a first preset length; the flexible connecting layer 34 includes a filling portion 34a and an interlayer connecting portion 34b that are integrally connected; the filling portion 34a fills the reserved groove 33, and at least part of the filling portion 34a is connected to the waterproof layer 22 at a height equal to or higher than the waterproof layer 22, and the interlayer connecting portion 34b at least extends along the surface of the waterproof layer 22 or between layers to be integrated; or the interlayer connecting portion 34b is extended at least along the first preset length between the waterproof roll material layer 32 and the bottom plate structure 24; the water-stop curtain 4 includes a first curtain 41 extending from the lower part of the second cushion layer 31 corresponding to the reserved groove 33 to the lower part of the first cushion layer 21.

[0057] The anti-leakage structure of the embodiment of the present application adopts a multi-dimensional waterproof processing method, and a reserved groove is pre-arranged in the broken part of the base plate structure. A flexible connection layer is formed by a filling part that fills the reserved groove, and an interlayer connection part that is integrally connected with the filling part and extended and mixed with the surface or interlayer of the waterproof layer, or at least extends along a first preset length between the waterproof membrane layer and the base plate structure to form a sealed connection. The flexible connection layer connects the waterproof layer or connects to the base plate structure and the waterproof membrane layer to form a complete waterproof structural layer, which can block the leakage part of the existing building structure along the pre-leakage path to prevent the leakage water from entering the upper part of the waterproof layer along the waterproof layer; at the same time, the soil of the foundation under the existing area and the newly built area is solidified, that is, the first curtain of a continuous water-stopping curtain is formed in the area between the lower part of the second cushion layer and the lower part of the first cushion layer corresponding to the reserved groove, so as to prevent the leakage water from leaking along the gap between the existing building structure and the newly built structure to the connection between the waterproof layer and the waterproof membrane layer, thereby further improving the anti-leakage effect. The present application forms a waterproof structural layer that cooperates with each other through the flexible connection layer and the first curtain of the water-stop curtain, which effectively prevents groundwater from leaking into the existing structure and the newly built structure.

[0058] It should be noted that the free end edge of the waterproofing coiled material layer in the reserved groove is the end where the waterproofing coiled material layer 32 is connected to the waterproofing layer 22. The water-stop curtain strengthens the weak waterproof part of the entire anti-leakage structure. Both the first cushion layer 21 and the second cushion layer 31 can be concrete cushion layers or cushion layers formed of other materials.

[0059] In the embodiment of the present application, a filling part is formed by setting and filling a reserved groove, and is connected to the waterproof layer and the waterproof coiled material layer respectively, so that the filling part, as a part of the waterproof structure, is waterproofed by blocking the leakage position of the existing building structure. In addition, the setting of the reserved groove and the filling part not only increases the area and thickness of the waterproof connection between the waterproof layer and the waterproof coiled material layer, but also increases the path length of groundwater entering the anti-leakage structure, the effective waterproof space and the waterproof structure strength of the weak waterproof parts, prevents the leakage of groundwater, and thus enhances the waterproof effect of the anti-leakage structure; the weight of the filling part in the reserved groove can also be used to press downward to achieve the connection with the waterproof coiled material layer and the waterproof layer, prevent the leakage of groundwater along the flexible connection layer, and make the waterproof connection structure have a more reliable anti-leakage effect. At the same time, the setting of the reserved groove also facilitates the construction personnel to construct the anti-leakage structure.

[0060] In the embodiment of the present application, the filling part fills the reserved groove, and at least part of the filling part is connected to the waterproof layer at a height equal to or higher than the waterproof layer, so that the flexible grouting material can penetrate into the interlayer or interlayer and surface of the waterproof layer after infiltrating the filling part formed by the backfill soil in the reserved groove, so as to form a flexible connection layer that at least extends to the waterproof layer. It should be noted that the interlayer of the waterproof layer refers to the interior of the waterproof layer itself. Since the waterproof layer is damaged, destroyed or aged, the flexible grouting material can repair the damaged position after infiltration to effectively waterproof.

[0061] In some embodiments, since the waterproof layer of the existing structure cannot be found, the waterproof layer and the waterproof roll material layer will be disconnected. In this regard, the present application adopts the free end of the waterproof roll material layer 32 in the reserved groove 33 to be edged at the lower part of the bottom plate structure 24 and extended toward the existing area 2 to set a first preset length, so as to limit the area between the waterproof roll material layer of the first preset length and the bottom plate structure, so that the flexible grouting material penetrated by the filling part penetrates into the area between the waterproof roll material layer of the first preset length and the bottom plate structure, forming an interlayer connection part sealed and connected to the bottom plate structure, thereby forming a flexible connection layer, and forming a complete waterproof structure layer with the waterproof roll material layer to play a waterproof role. Optionally, the free end of the waterproof roll material layer 32 in the reserved groove 33 is edged at the lower part of the bottom plate structure 24, extending toward the existing area 2 and covering at least part of the first cushion layer 21 by a first preset length. The waterproof roll material layer of the first preset length can be connected and covered on at least part of the first cushion layer 21 by thermal welding to play a waterproof role, thereby forming a complete waterproof structure layer. The first preset length can be set to 15mm, 20mm, 30mm, 50mm, 75mm, 80mm, 150mm, 200mm, or a value between any two values ​​according to the conditions of the construction site. This solution is applicable to situations where no existing waterproof structure waterproof layer can be found.

[0062] like Figure 3 As shown, the waterproof layer 22 and the waterproof roll material layer 32 are arranged at equal heights, so that the upper surfaces of the waterproof layer and the waterproof roll material layer are flush with the top of the reserved groove, that is, the filling part can fill the reserved groove and be connected to the waterproof layer at an equal height.

[0063] In some embodiments, the height of the top of the reserved groove 33 at one end of the newly built area 5 is higher than the height of the reserved groove 33 at one end of the existing area 2. In some embodiments, the height of the reserved groove 33 at one end of the newly built area 5 is equal to or higher than the height of the waterproof layer 22, or equal to or higher than the height of the waterproof protective layer 23, which can be achieved by raising at least one of the foundation and the second cushion layer and laying a waterproof roll material layer. The filling part of the reserved groove blocks the possible leakage paths between the first cushion layer, the waterproof layer, the waterproof protective layer and the bottom plate structure of the first waterproof structure, preventing groundwater from leaking to the upper part of the waterproof layer through these paths. In addition, the flexible grouting material is infiltrated through the gaps between these structural layers to form interlayer connections, and the possible leakage paths are blocked in advance to prevent leakage.

[0064] In some embodiments, the height of the top of the reserved groove 33 at one end of the newly built area 5 is higher than the height of the reserved groove 33 at one end of the existing area 2, and the filling part 34a is inclined downward from the second waterproof structure 3 to the first waterproof structure 1. The filling part can not only block the leakage path between the first waterproof structure, but also block the leakage path between the filling part and the second waterproof structure, further improving the waterproof effect.

[0065] In some embodiments, the filling part 34a includes an upper end 34a1 and a lower end 34a2; the lower end 34a2 is connected to the waterproof layer 22, or to the waterproof protective layer 23, or to the bottom plate structure 24, and the upper end 34a1 is connected to the waterproof roll material layer 32 at least in the reserved groove 33 at a higher level than the lower end 34a2. The filling parts with different slopes are formed by connecting to different positions of the first waterproof structure.

[0066] In some embodiments, the filling portion 34a is inclined downward from the first waterproof structure 1 to the second waterproof structure 3. This is applicable to the case where the waterproof roll material layer 32 from the reserved groove 33 to the new construction area 5 is lower than, equal to, or higher than the waterproof layer 22.

[0067] In the embodiment, backfill soil is used to fill the reserved ditch to form a filling part that is inclined downward from the first waterproof structure to the second waterproof structure from high to low, so that after the flexible grouting material completely infiltrates the backfill soil of the filling part, a filling part with a certain elasticity and waterproof effect is formed to block the gaps between the waterproof layer, the first cushion layer and the waterproof coiled material layer to achieve waterproofing; more flexible grouting material can also be generated by the higher side of the filling part to penetrate along the gaps between the waterproof layer and the first cushion layer and inside the waterproof layer, so as to facilitate the formation of an interlayer connection part with the waterproof layer. The filling part and the interlayer connection part integrally connected therewith form a relatively complete waterproof structural layer with the waterproof layer and the waterproof coiled material layer, so as to achieve the effect of preventing leakage of existing building structures and newly built structures. At the same time, the filling part can store part of the flexible grouting material, so as to facilitate the infiltration into the gaps between the waterproof layer and the first cushion layer, the gaps between the waterproof layer and the waterproof protective layer, and the gaps between the waterproof protective layer and the bottom plate structure, and form an interlayer connection part by mixing with the first waterproof structure.

[0068] In some embodiments, the filling part fills the top of the reserved groove and is recessed from both ends to the middle along the width direction of the reserved groove, so that the filling part provides flexible grouting material for penetration into the gap between the first waterproof structure, the post-cast strip and the waterproof membrane layer, thereby forming a waterproof interlayer connecting layer.

[0069] In some embodiments, the filling part 34a includes an upper end 34a1 and a lower end 34a2; the upper end 34a1 is connected to the waterproof layer 22, or to the waterproof protective layer 23, or to the bottom plate structure 24, and the lower end 34a2 is set in the reserved groove 33 and between the part of the waterproof roll material layer 32 that is higher than the reserved groove 33 and covers the newly built area 5. In order to form filling parts with different inclinations and connected to different positions of the first waterproof structure and different positions of the second waterproof structure. Optionally, the lower end 34a2 of the filling part 34a is flush with the upper part of the waterproof roll material layer 32 on the side of the top of the reserved groove 33 facing the newly built area.

[0070] For example, Figure 3As shown, the upper end 34a1 of the filling part 34a is connected to the waterproof protective layer 23, and the lower end 34a2 of the filling part 34a is flush with the upper part of the waterproof roll material layer 32 on the side of the top of the reserved groove 33 toward the newly built area. In the embodiment of the present application, the lower end 34a2 of the filling part 34a is flush with the upper part of the waterproof roll material layer 32 on the side of the top of the reserved groove 33 toward the newly built area 5, so that the flexible grouting material that infiltrates the filling part 34a can penetrate into the direction of the newly built area 5 through the gap between the waterproof roll material layer 32 and the post-casting strip 6, forming a waterproof and sealed interlayer connection. However, it is difficult to achieve this effect if the lower end is connected to the waterproof roll material layer in the reserved groove. If the lower end is connected to the part of the waterproof roll material layer that is higher than the reserved groove and covers the newly built area, the amount of flexible grouting material consumed is relatively large. The upper end 34a1 of the filling part 34a is connected to the waterproof protective layer 23, so that the flexible grouting material soaking the filling part 34a can penetrate into the gap at the connection between the second cushion layer 31 and the first cushion layer 21, the gap between the first cushion layer 21 and the waterproof layer 22, the gap inside the waterproof layer 22, and the gap between the waterproof layer 22 and the waterproof protective layer 23 through the waterproof layer 22 at the connection between the free end edge of the reserved groove 33 and the end edge of the waterproof membrane layer 32, and form an interlayer connecting part 34b with the waterproof layer 22, so that the filling part and the interlayer connecting part integrally connected thereto constitute a flexible connecting layer, connect the waterproof layer and the newly built waterproof layer into a complete waterproof structural layer, pre-block possible leakage paths, and achieve the anti-leakage effect of the existing structure and the newly built structure.

[0071] In some embodiments, the upper end 34a1 of the filling portion 34a is connected to the lower part of the bottom plate structure 24, and the lower end 34a2 is flush with the upper part of the waterproof roll material layer 32 on the side of the top of the reserved groove 33 facing the newly built area. In the embodiment of the present application, the interlayer connection portion 34b, on the basis of extending to the interlayer of the waterproof layer 22 and the waterproof layer to the surface of the first cushion layer and the waterproof protective layer to form an interlayer connection portion, further extends to the gap between the waterproof protective layer 23 and the bottom plate structure 24 to form an interlayer connection portion, so as to form an interlayer connection portion including this part, block the leakage path between the waterproof protective layer and the bottom plate structure, and improve the anti-leakage effect of the existing building structure and the newly built structure.

[0072] In some embodiments, the portion between the upper end 34a1 and the lower end 34a2 of the filling portion 34a is a flat inclined surface. In other embodiments, the portion between the upper end 34a1 and the lower end 34a2 of the filling portion 34a is a curved surface that protrudes outward away from the main body of the filling portion 34a (such as protruding toward the side of the post-casting strip), or a curved surface that is recessed into the reserved groove.

[0073] In some embodiments, the width of the reserved groove 33 is ≥300 mm, which provides a large operating space for construction workers. Optionally, the width of the reserved groove can be 320 mm, 350 mm, or 360 mm.

[0074] In some embodiments of the present application, Figure 1 or Figure 3 As shown, the cross section of the reserved groove 33 is rectangular, so as to increase the contact area between the filling part in the reserved groove and the waterproof membrane layer, and also increase the path length for preventing groundwater leakage, further improving the anti-leakage effect of existing building structures and new structures. In other embodiments, the cross section of the reserved groove can also be set to an arc, such as a semicircle.

[0075] In some embodiments of the present application, along the direction X from the newly built area 5 to the existing area 2, the first curtain 41 of the water-stop curtain 4 is at least flush with the interlayer connection part 34b in the foundation 17, so as to solidify the soil from the lower part of the second cushion layer 31 to the lower part of the first cushion layer corresponding to the reserved groove, block the leakage path from the foundation, and improve the anti-leakage effect of the existing building structure and the newly built structure. It can be understood that along the direction from the reserved groove to the existing area 2, the first curtain 41 of the water-stop curtain 4 can extend a first length in the foundation 17 along the direction X from the newly built area 5 to the existing area 2, and the first length is greater than the length of the interlayer connection part 34b, so as to cover the area below the existing building structure, prevent groundwater from leaking into the anti-leakage structure through this part of the area, and then avoid leaking into the room, thereby improving the anti-leakage effect of the existing building structure and the newly built structure.

[0076] In some embodiments, the waterproofing membrane layer 32 is formed by laying a self-adhesive pre-laid waterproofing membrane. For example, the self-adhesive pre-laid waterproofing membrane may be a 4 mm thick APF-700 pre-laid waterproofing membrane. The self-adhesive pre-laid waterproofing membrane may react and bond with the subsequently poured concrete to form a whole, thereby avoiding leakage problems caused by water flowing from the existing building structure to the waterproofing membrane layer.

[0077] The inventor of the present application has found that since the existing building structure has been built for a certain number of years, part or all of the settlement has been completed. However, the newly built structure has just started to settle, and the problem of groundwater leakage into the room may occur during the settlement process. The present application makes further improvements based on the above improvements.

[0078] In some embodiments, the water-stop curtain 4 also includes a second curtain 42 continuously arranged in an area from the lower part of the second cushion layer 31 corresponding to the reserved groove 33 to the lower part of the second cushion layer 31 of the newly built area 5. In the present application, the second curtain 42 of the water-stop curtain 4 solidifies the soil in the area from the lower part of the second cushion layer corresponding to the reserved groove to the lower part of the second cushion layer 31 of the newly built area, that is, the area from the lower part of the second cushion layer 31 corresponding to the reserved groove 33 to the lower part of the newly built area 5 is covered to adapt to the later settlement of the newly built structure part, prevent groundwater from leaking into the anti-leakage structure through this part of the area, and then play a role in preventing groundwater from leaking into the room, thereby improving the anti-leakage effect of existing building structures and newly built structures.

[0079] In some embodiments, the flexible grouting material is an acrylate grouting liquid, or a similar flexible grouting material with elasticity, so as to infiltrate the backfill soil to form an integral flexible connection layer.

[0080] In a second aspect, an embodiment of the present application further provides a construction method for an anti-leakage structure, comprising: forming a concave first reserved groove 100 in the foundation 17 at the bottom of the bottom plate structure 24 along a horizontal plane from the existing area 2 to the newly built area 5; constructing a second cushion layer 31 from the first cushion layer 21, through the upper surface of the first reserved groove 100, in the direction Y from the existing area 2 to the newly built area 5, to form a concave portion 31a; laying a waterproof roll material layer 32 extending from the waterproof layer 22 or in the existing area 2 into the lower part of the bottom plate structure 24 by a first preset length, and through the upper surface of the concave portion 31a from the existing area 2 to the newly built area 5 in the direction Y, to form a pre- A groove 33 is retained; a filling portion 34a is formed in the reserved groove 33, so that at least part of the filling portion is connected to the waterproof layer at a height equal to or higher than the waterproof layer, or is connected to the base plate structure 24 at a first preset length of the waterproof membrane layer 32; a flexible grouting material is used to infiltrate the filling portion 34a and at least penetrate into the waterproof layer 22 to form an interlayer connection portion 34b that is sealed and connected to the waterproof layer 22 or connected to the base plate structure 24; the interlayer connection portion 34b is integrally connected to the filling portion 34a to form a flexible connection layer 34; a first curtain 41 of the water-stop curtain 4 is formed in the area below the first cushion layer 21 and the second cushion layer 31 corresponding to the reserved groove 33.

[0081] The construction method of the anti-seepage structure of the embodiment of the present application is as follows: a first curtain of a continuous water-stop curtain is formed in the area below the second cushion layer corresponding to the first cushion layer and the reserved groove; and a first recessed reserved groove is formed in the foundation at the lower part of the bottom plate structure, and a second cushion layer connected to the first cushion layer is laid on the upper surface of the first reserved groove from the existing area to the newly built area to form a recess; a waterproof roll material layer connected to the waterproof layer or extending into the lower part of the bottom plate structure and facing the existing area by a first preset length is laid on the upper surface of the recess from the existing area to the newly built area to form a reserved groove; along the length direction of the cross-section part of the bottom plate structure A filling part is formed in the reserved groove, so that at least part of the filling part is connected to the waterproof layer at a height equal to or higher than the waterproof layer, or connected to the base plate structure at a first preset length of the waterproof roll material layer; a flexible grouting material is used to infiltrate the filling part and at least penetrate into the interlayer or surface of the waterproof layer, or between the waterproof roll material layer and the base plate structure at a first preset length, so as to form an interlayer connection part that is sealed and connected to the waterproof layer or the base plate structure, and the interlayer connection part and the filling part are integrally connected to form a flexible connection layer, and the leakage path of the existing building structure and the newly built structure in the waterproof layer is blocked in advance to achieve the anti-leakage effect of the existing building structure and the newly built structure. The construction method of the anti-leakage structure of the present application solidifies the soil in the foundation under the existing building structure and the newly built structure, and forms a first curtain of a continuous water-stopping curtain in the area below the first cushion layer and the second cushion layer corresponding to the reserved groove, so as to prevent groundwater from entering the anti-leakage structure to cause leakage, thereby improving the anti-leakage effect of the existing building structure and the newly built structure.

[0082] In some embodiments, a waterproof roll material layer is laid from the waterproof layer or in the existing area, extending into the lower part of the base structure and covering at least part of the first cushion layer by the first preset length, and laid in the direction of the upper surface of the recess to the newly built area. Since the filling part in the reserved groove is in a semi-sealed state, the only penetration path of the flexible grouting material is the cross-sectional part of the existing building structure. Such a setting can limit the penetration of the flexible grouting material through the filling part to the first preset length of the waterproof roll material layer to the infiltration area between the base structure, thereby forming an interlayer connection part connected to the base structure, realizing the connection of the newly built structure with the existing waterproof structure to form a complete waterproof structure layer, and effectively playing an anti-leakage effect. Optionally, the first preset length of the waterproof roll material layer can be realized by cleaning and removing the soil layer and the first cushion layer in the foundation, backfilling the foundation soil, constructing the second cushion layer to connect the first cushion layer, and laying the first preset length of the waterproof roll material layer. In the case of no first cushion layer, the foundation soil under part of the base structure can be directly excavated, the second cushion layer can be constructed, and the first preset length of the waterproof roll material layer can be laid, or the first preset length of the waterproof roll material layer can be directly laid. The present application does not explicitly limit the order of laying the first preset length of waterproofing coiled material layer, backfilling the base soil, and constructing the second cushion layer. The first preset length of waterproofing coiled material layer can be covered and connected to the first cushion layer by heat welding.

[0083] like Figure 3-4 and Figure 7 As shown, a first curtain 41 of the water-stopping curtain 4 is formed in the area below the second cushion layer 31 corresponding to the first cushion layer 21 and the reserved groove 33, including: grouting holes 25 are arranged at intervals along the direction X from the new area 5 to the existing area 2 in the bottom plate structure and along the length direction Z of the cross-section part 24a of the bottom plate structure, grouting holes 25 are drilled from the bottom plate structure 24 deep into the foundation 17, and curtain grouting pipes 26 are arranged in the grouting holes 25; curtain grouting material is poured from the foundation 17 to the area below the second cushion layer 31 corresponding to the first cushion layer 21 and the reserved groove 33 through the curtain grouting pipe 26, so as to form a first curtain 41 of the continuous water-stopping curtain 4 in the area below the first cushion layer 21 and the reserved groove 33.

[0084] In some embodiments, Figure 1-4 As shown, grouting holes 25 are arranged at intervals along the direction X from the newly built area 5 to the existing area 2 and along the length direction Z of the bottom plate structure section part 24a, and drilling the grouting holes 25 from the bottom plate structure 24 to the foundation 17 includes: drilling grouting holes 25 from the bottom plate structure 24 to the foundation 17 on the upper surface of the bottom plate structure 24. In the embodiment of the present application, the grouting holes drilled on the upper surface of the bottom plate structure to penetrate into the foundation are suitable for the case where the thickness of the bottom plate structure is ≤1.5 meters, so that grouting is performed from the lower part of the first cushion layer 21 corresponding to the bottom plate structure 24 to the lower part of the second cushion layer 31 corresponding to the reserved groove through the curtain grouting pipe to form the first curtain 41 of the water-stop curtain 4.

[0085] The inventor of the present application found that the thickness of part of the bottom plate structure 24 is too thick (>1.5m), and it is difficult to vertically drill grouting holes on the upper surface of the bottom plate structure 24, and it may damage the steel bars in the bottom plate structure. Therefore, the method of drilling grouting holes 25 in the bottom plate structure is improved. The cross-section part 24a of the bottom plate structure 24 is obliquely drilled downward to the foundation at the bottom of the bottom plate structure to form a grouting hole 25, so as to pre-embed the curtain grouting pipe 26 in the grouting hole, and form the first curtain of the water-stop curtain after grouting. In order to make the grouting process clear, an observation hole adjacent to the grouting hole can be set at the root of the bottom plate structure, that is, the first cushion layer where the reserved groove is set. If traces of grouting material are found in the observation hole, the grouting of grouting material is stopped.

[0086] In some embodiments, Figure 5 , Figure 6 and Figure 7 As shown, grouting holes 25 are arranged at intervals along the direction X from the newly built area 5 to the existing area 2 and along the length direction Z of the bottom plate structure cross-section portion 24a, and drilling the grouting holes 25 from the bottom plate structure 24 to the foundation 17 includes: drilling the grouting holes 25 from the bottom plate structure 24 to the foundation 17 in the cross-section portion 24a of the bottom plate structure 24, so that the grouting holes and the first cushion layer 21 form a first preset angle α , the first preset angleα Satisfy 10°≤ α <90°. In the embodiment of the present application, a grouting hole is drilled deep into the foundation in the cross-section of the bottom plate structure along the direction X from the newly built area 5 to the existing area 2, which is suitable for the case where the thickness of the bottom plate structure is greater than 1.5 meters, so that grouting is performed through the curtain grouting pipe from the lower part of the first cushion layer 21 corresponding to the bottom plate structure 24 to the lower part of the second cushion layer 31 corresponding to the reserved groove to form the first curtain 41 of the water-stop curtain 4. Exemplarily, the first preset angle α Grouting holes deep into the foundation can be drilled through the cross-section of the base plate structure along the direction X from the newly built area 5 to the existing area 2 at 12°, 15°, 20°, 30°, 45°, 55°, 60°, 72°, 75°, 80°, and 85°.

[0087] In some embodiments, Figure 2 As shown, the drilled grouting holes 25 are arranged in rows. Optionally, any two adjacent rows of grouting holes 25 are arranged in a staggered manner to solidify the soil in the foundation at the lower part of the second cushion layer corresponding to the reserved ditch from the first cushion layer to form the first curtain of a continuous water-stop curtain, thereby preventing groundwater from entering the waterproof layer through the connection between the existing structure and the newly built structure to prevent leakage.

[0088] In some embodiments, the interval d1 of the grouting holes 25 along the direction X from the newly built area 5 to the existing area 2 and along the length direction Z of the bottom plate structure section 24a is 500mm to 1500mm. Figure 2 As shown, the interval d1 of the grouting holes 25 along the direction X from the newly built area 5 to the existing area 2 and along the length direction Z of the bottom plate structure section 24a can be independently 500, 600, 640, 700, 750, 800, 900, 1000, 1200, 1300, 1400, 1450 mm. Under the premise of not affecting the structural strength of the bottom plate structure around the grouting holes, a first curtain of a continuous water-stop curtain is formed between the first cushion layer and the lower part of the second cushion layer corresponding to the reserved groove through the curtain grouting pipe.

[0089] In some embodiments, the minimum distance d0 from the grouting hole to the bottom plate structure section is 300 mm to 750 mm. Figure 2 As shown, the minimum distance d0 between the grouting hole and the bottom plate structure cross-section portion 24a is 300, 320, 350, 400, 450, 500, 600, 650, 680, 700, 720 mm, indicating the grouting hole closest to the cross-section portion 24a, so as to form a first curtain of water-stop curtain that at least covers the lower area of ​​the second cushion layer corresponding to the reserved groove in the area under the second cushion layer corresponding to the reserved groove, thereby effectively preventing leakage.

[0090] In some embodiments, the width of the first reserved groove 100 is ≥500mm to increase the connection area between the existing building structure and the new structure, so as to facilitate the subsequent laying of the second cushion layer 31 and the waterproof membrane layer 32 by the construction personnel. The width of the recess 31a is ≥320mm to facilitate the construction personnel to construct the waterproof membrane layer 32 in the recess. The width of the reserved groove is ≥300mm to increase the contact area between the filling part in the reserved groove and the waterproof membrane layer, that is, the reserved groove is used to increase the length of the path to hinder groundwater leakage and also increase the waterproof space. Compared with the direct contact connection between the waterproof membrane layer and the waterproof layer, the anti-leakage effect of the existing building structure and the new structure can be significantly improved. At the same time, it is also convenient for personnel to construct.

[0091] In the construction method of the anti-seepage structure of some embodiments, a filling portion is formed in the reserved groove, and a flexible grouting material is used to infiltrate the filling portion, including: a first horizontal grouting pipe 35 is arranged in the reserved groove 33 along the length direction Z of the bottom plate structure cross-section portion 24a and located on the upper surface of the waterproof membrane layer 32, and a first vertical grouting pipe 36 connected to the first horizontal grouting pipe 35 is arranged at intervals; the first horizontal grouting pipe 35 and at least a part of the first vertical grouting pipe 36 are buried in backfill soil to form a filling portion 34a; a flexible grouting material is poured into the filling portion 34a through the first vertical grouting pipe 36 and the first horizontal grouting pipe 35, so that the flexible grouting material infiltrates the filling portion 34a and at least penetrates into the gap between the waterproof layer 22 and the waterproof protective layer 23 to form an interlayer connection portion 34b that is sealed and connected to the waterproof layer 22; the interlayer connection portion 34b is integrally connected to the filling portion 34a to form a flexible connection layer 34. It is understandable that the filling part of the infiltrated flexible grouting material can also be formed by backfilling the filling part with soil and then forming a closed structure through formwork for high-pressure grouting, and this application does not make any clear limitation.

[0092] In some embodiments, first vertical grouting pipes 36 connected to the first horizontal grouting pipes 35 are arranged on the first horizontal grouting pipes 35 at preset intervals of 3 meters to 6 meters along the length direction Z of the bottom plate structure cross-section portion 24a.

[0093] In the construction method of the anti-seepage structure in some embodiments, a filling part is formed in the reserved trench, and the filling part is infiltrated with a flexible grouting material, including: filling the reserved trench with backfill soil to form the filling part, and pouring the flexible grouting material into the filling part by a formwork method, so as to infiltrate the filling part with the flexible grouting material. That is, after the reserved trench is filled with backfill soil to form the filling part, a formwork is set up, and then grouting is performed.

[0094] It should be noted that grouting using the first vertical grouting pipe and the first horizontal grouting pipe or by formwork grouting can be carried out using the overall grouting material control method. After calculating the amount of material required to wet the filling part in the reserved groove and the gap between the first cushion layer and the base plate structure, high-pressure grouting is performed with a flexible grouting material equal to or greater than the amount to ensure that the flexible grouting material penetrates into the gap between the first cushion layer and the waterproof layer, the waterproof protective layer, and the floor structure, or penetrates into the first preset length of the waterproof membrane layer and the base plate structure to form an interlayer connecting layer, thereby forming a sealed connection between the flexible connecting layer.

[0095] In some embodiments, forming a filling portion in the reserved groove includes: making the filling portion tilt downward from the first waterproof structure to the second waterproof structure, so as to form a filling portion tilted downward from the waterproof layer, waterproof protective layer, and bottom plate structure of the first waterproof structure to the second waterproof structure.

[0096] In some embodiments, the filling part includes an upper end and a lower end; the filling part is tilted downward from the first waterproof structure to the second waterproof structure, including: the upper end is set between the waterproof layer and the bottom plate structure, and the lower end is set in the reserved groove to the part of the waterproof roll material layer that is higher than the reserved groove and covers the newly built area. Optionally, the lower end is set flush with the upper part of the waterproof roll material layer 32 on the side of the newly built area at the top of the reserved groove 33, so that while forming the filling part and the flexible connection layer that block the first waterproof structure, the interlayer connection part is extended to the waterproof roll material layer and the post-casting strip, saving the amount of flexible grouting material.

[0097] In some embodiments, the upper end 34a1 of the filling part 34a is connected to the waterproof protective layer 23, and the lower end 34a2 of the filling part 34a is flush with the upper part of the waterproof coiled material layer, so that the flexible grouting material penetrates into the waterproof layer and the gap between the waterproof layer and the waterproof protective layer to form an interlayer connection. While the gap between the waterproof layer and the waterproof protective layer is blocked by the filling part to prevent leakage, the flexible grouting material is also penetrated into the gap between the waterproof layer and the first cushion layer, the inside of the waterproof layer, and the gap between the waterproof layer and the waterproof protective layer through the filling part to form an interlayer connection that is sealed with the waterproof layer, that is, by blocking the leakage path in advance, groundwater is further prevented from leaking through the existing structure into the newly built waterproof layer, thereby improving the anti-leakage effect. The upper end 34a1 of the filling portion 34a is connected to the lower part of the base plate structure 24, and the lower end of the filling portion 34a is flush with the upper part of the waterproof membrane layer 32. On the basis of the above scheme, the flexible grouting material can penetrate into the gap between the waterproof protection layer 23 and the base plate structure 24 to form an interlayer connection portion. By pre-blocking the leakage channel between the waterproof protection layer 23 and the base plate structure 24, groundwater is further prevented from leaking through the existing structure into the newly built waterproof layer, thereby improving the anti-leakage effect.

[0098] In some embodiments, forming a filling portion in the reserved groove includes: the height of the top of the reserved groove at one end of the newly built area is higher than the height of the reserved groove at one end of the existing area. After the flexible grouting material infiltrates the filling portion, it penetrates into the interlayer and surface of the waterproof layer in the first waterproof structure, and even between the waterproof protection layer and the bottom plate structure to form an interlayer connection portion. In addition, the anti-seepage structure can adapt to the subsequent settlement of the second waterproof structure in the newly built area, and prevent groundwater from leaking into the room through the anti-seepage structure.

[0099] In some embodiments, the lower end is disposed between the waterproof layer and the bottom plate structure, and the upper end is disposed at least in the reserved groove at a height higher than the lower end and connected to the waterproof roll material layer, so that the flexible grouting material can penetrate into the interlayer and surface of the waterproof layer in the first waterproof structure, and even form an interlayer connection portion between the waterproof protective layer and the bottom plate structure.

[0100] like Figure 4 As shown, the construction method of the anti-seepage structure of some embodiments also includes: before or during the construction of the second cushion layer 31, a third vertical grouting pipe 51 is pre-buried and set at intervals from the lower part of the second cushion layer 31 of the newly-built area 5 along the length direction Z of the bottom plate structure cross-section portion 24a; curtain grouting material is poured into the lower part of the second cushion layer 31 through the third vertical grouting pipe 51 to form a second curtain of water-stopping curtains continuously set from the lower part of the second cushion layer 31 corresponding to the reserved groove 33 to the lower part of the newly-built area 5. The anti-seepage structure construction method is to pre-buried and set the third vertical grouting pipe at intervals from the lower part of the second cushion layer of the newly-built area, and pour the curtain grouting material into the lower part of the second cushion layer through the third vertical grouting pipe to form a second curtain of water-stopping curtains continuously set from the lower part of the second cushion layer corresponding to the reserved groove to the lower part of the newly-built area, thereby preventing groundwater from leaking onto the waterproof membrane layer and improving the anti-seepage effect.

[0101] It should be noted that the third vertical grouting pipe needs to be pre-buried before the construction of the second cushion layer or at least during the construction of the second cushion layer, and the buried height is from the lower part of the second cushion layer to the upper surface of the newly built base plate, and is fixedly connected to the base plate steel bars, so that grouting can be performed through the third vertical grouting pipe to form a second curtain of the water-stop curtain. As for the pouring of grout through the third vertical grouting pipe, it can be carried out after the construction of the second cushion layer, or after the formation of a complete connection structure between the existing building structure and the newly built structure. This application does not make clear restrictions on this. It is preferably carried out after the formation of a complete connection structure between the existing structure and the newly built structure, so that the slurry poured through the third vertical grouting pipe can form a denser second curtain of the water-stop curtain under the greater pressure of the second cushion layer. The second curtain of the water-stop curtain can be connected to the first curtain by grouting at the same time, or it can be connected to each other by grouting separately.

[0102] In some embodiments, the anti-seepage structure construction method further includes: cleaning the backfill soil of the base plate structure, and performing a slope reduction process to form a downward-sloping backfill soil slope in the direction from the upper part of the base plate structure to the newly-built area. In the embodiment of the present application, there is a backfill soil layer 19 and an existing protective layer 20 above part of the base plate structure 24. Therefore, it is necessary to clean part of the backfill soil layer 19 and the existing protective layer 20 on the base plate structure 24, that is, to perform a slope reduction process to form a downward-sloping backfill soil slope in the direction from the base plate structure to the newly-built part to be formed, which can facilitate the construction personnel to carry out the anti-seepage structure and the connecting structure construction, and can also ensure the safety of the construction process, and prevent the backfill soil from falling or collapsing into the reserved ditch at the bottom of the base plate structure.

[0103] On the third aspect, an embodiment of the present application provides a connection structure, including the above-mentioned anti-leakage structure, and a post-cast strip 6, which is arranged along the direction Y from the existing area 2 to the newly built area 5 to cover at least part of the waterproof membrane layer 32, and the post-cast strip 6 covers the filling part 34a and is connected to the base plate structure 24; the newly built base plate 50 extends along the direction Y from the existing area 2 to the newly built area 5 to cover the waterproof membrane layer 32 not covered by the post-cast strip 6, and is connected to the post-cast strip 6.

[0104] The connection structure of the embodiment of the present application is based on the anti-leakage structure, and a covering filling portion is set by covering at least part of the waterproof membrane layer along the direction from the existing area to the newly built area, and a post-cast strip connected to the base plate structure; and the waterproof membrane layer not covered by the post-cast strip is covered in the direction from the existing area to the newly built area, and a new base plate connected to the post-cast strip is set, so as to form a complete connection structure between the existing building structure and the newly built structure, which can effectively prevent groundwater from leaking into the room.

[0105] In the embodiment of the present application, a post-cast strip is provided between the existing building structure and the newly built structure to reserve the expansion and contraction amount of the newly built structure part, and the post-cast strip is cast after the expansion and contraction of the concrete of the newly built bottom plate is completed. The filling part 34a is covered by the post-cast strip 6 and connected to the bottom plate structure 24. For the filling part that is inclined downward from the first waterproof structure 1 to the second waterproof structure 3, the concrete cast in the post-cast strip area exerts pressure on the filling part 34a by its own gravity during the process of forming the post-cast strip 6. Since the filling part is formed by the flexible grouting material infiltrating the backfill soil, it has elasticity and flexibility. On the basis of pre-blocking the leakage path by the filling part and the interlayer connection part, the filling part 34a is further pressed on the first waterproof structure under the pressure applied by the post-cast strip, and is more closely connected with the waterproof layer 22 and the waterproof protective layer 23 of the existing building structure, and even with the bottom plate structure 24, and the anti-leakage effect of the connection structure is further improved through the interaction between the post-cast strip and the filling part. During the subsequent settlement process, the force exerted on the filling part by the post-cast strip and the new bottom plate of the new structure gradually increases, which will further enhance the sealing connection performance between the filling part and the existing structure, thereby improving the anti-leakage effect of the connection structure as the new structure settles.

[0106] In some embodiments, the post-cast strip 6 is provided with connecting steel bars 7 extending into the bottom plate structure 24, so as to firmly connect the post-cast strip to the bottom plate structure 24 through the connecting steel bars 7. Optionally, the connecting steel bars 7 are extended into the bottom plate structure by the bottom plate steel bars of the newly built bottom plate, forming an integrated connection structure to enhance the anti-seepage performance.

[0107] In some embodiments, the cross-section portion 24a where the bottom plate structure 24 is connected to the post-cast strip 6 is provided with a cement-based crystalline waterproof coating layer to increase the connectivity and sealing of the bottom plate structure and the post-cast strip. Optionally, the bottom plate structure 24 and the post-cast strip 6 are sealed with a resin slurry to better seal the construction joint between the bottom plate structure 24 and the post-cast strip 6 to prevent groundwater from leaking through the construction joint to the connection structure between the existing building structure and the newly built structure.

[0108] In some embodiments, an embedded waterproof steel plate 8 is provided between the post-cast strip 6 and the newly built bottom plate 50, and the embedded waterproof steel plate 8 is continuously provided along the length direction Z of the bottom plate structural section portion 24a to better seal the post-cast strip 6 and the newly built bottom plate 50 to play a waterproof role. Optionally, an external waterproof strip 9 is provided between the lower part of the connection between the post-cast strip 6 and the newly built bottom plate 50 and the waterproof roll material layer 32 to better play a role in preventing leakage.

[0109] Fourthly, the present application also provides a construction method for a connecting structure, including: the construction method of the above-mentioned anti-seepage structure, and setting a post-cast strip area between the existing area and the newly built area; forming bottom plate steel bars in the newly built area; constructing concrete to cover the bottom plate steel bars to form a newly built bottom plate; constructing concrete in the post-cast strip area to cover the filling part to form a post-cast strip connected to the bottom plate structure and the newly built bottom plate.

[0110] The construction method of the embodiment of the present application, based on the formation of an anti-seepage structure by the construction method of the anti-seepage structure, forms a new bottom plate by forming bottom plate steel bars in the new area and constructing concrete, sets a post-cast joint area between the existing area and the new area and constructs concrete to form a post-cast joint, further connects the existing building structure with the new structure, and enables the connection structure to achieve an anti-seepage effect.

[0111] In some embodiments, the construction method of the connection structure further includes: roughening the cross-section of the bottom plate structure so that the cross-section of the bottom plate structure has a rough surface, so that the post-cast strip and the cross-section of the bottom plate structure are better connected as one.

[0112] In some embodiments, the construction method of the connection structure further includes: drilling a reinforcing bar hole (not shown in the figure) in the cross-section of the bottom plate structure into the bottom plate structure, and setting a connecting steel bar in the reinforcing bar hole to more firmly connect the bottom plate structure and the post-cast strip as a whole. Optionally, the connecting steel bar is tied and fixedly connected or integrally connected with the bottom plate steel bar of the newly built bottom plate.

[0113] In some embodiments, the construction method of the connection structure further comprises: applying a cement-based penetrating crystalline waterproof coating on the rough surface of the base structure to form a cement-based penetrating crystalline waterproof coating layer of a preset thickness. For example, the preset thickness of the cement-based penetrating crystalline waterproof coating layer may be 0.5 mm, 0.75 mm, 0.9 mm, 1.0 mm, 1.2 mm, 1.5 mm, 1.8 mm, or 2 mm.

[0114] In some embodiments, the construction method of the connection structure further includes: tying and fixing the first vertical grouting pipe to the connecting steel bars to fix the position of the first vertical grouting pipe.

[0115] In some examples, the construction method of the connection structure also includes: setting a second transverse grouting pipe 61 from the lower part to the middle part of the thickness direction T of the bottom plate structure and along the length direction Z of the bottom plate structure section 24a, and setting a second vertical grouting pipe 62 connected to the second transverse grouting pipe 61 at intervals; injecting resin slurry into the construction joint between the bottom plate structure and the post-casting strip through the second vertical grouting pipe and the second transverse grouting pipe to seal the bottom plate structure and the post-casting strip. Optionally, the second vertical grouting pipe is fixedly connected to the connecting steel bar 7 by binding. Along the length direction Z of the bottom plate structure section 24a, a second vertical grouting pipe 62 connected to the second transverse grouting pipe 61 is set at intervals of 3-5 meters to inject continuous resin slurry between the construction joint of the bottom plate structure 24 and the post-casting strip to seal the construction joint.

[0116] In some embodiments, the construction method of the connecting structure also includes: before constructing the new base plate, setting an external waterstop strip at the connection between the post-poured strip area and the new area and between the waterproof membrane layer to better seal the new base plate and the post-poured strip, thereby improving the anti-leakage effect of the connecting structure.

[0117] In some embodiments, the construction method of the connecting structure also includes: setting an embedded water-stop steel plate 8 between the newly built bottom plate 50 and the post-cast strip 6 (such as the middle part where the two are connected) along the length direction Z of the bottom plate structure cross-section portion 24a, connecting the post-cast strip 6 with the newly built bottom plate 50 to improve the anti-leakage effect.

[0118] The construction method of the connection structure also includes: pre-embedding a third vertical grouting pipe 52 from the lower part of the second cushion layer to the bottom plate steel bars, and tying and fixing the third vertical grouting pipe 52 to the bottom plate steel bars.

[0119] It should be noted that the curtain grouting pipe, the first horizontal grouting pipe, the second horizontal grouting pipe, the second horizontal grouting pipe, the second vertical grouting pipe, and the third vertical grouting pipe all need to be processed as follows: a. Clean and test the pipeline passage of the grouting pipe; b. Connect the grouting nozzle of the grouting pipe to the grouting machine for grouting and inject the corresponding slurry; c. After the grouting is completed, the grouting nozzle is raised and the grouting pipe is sealed with sealing paste and leak-proof king. The sealing is required to be tight and without holes. After the grouting is completed, the grouting nozzle needs to be chiseled off, and then sealed with leak-proof waterproof materials such as sealing paste and leak-proof king.

[0120] In the construction method of the connection structure of some embodiments, for the anti-leakage structure with grouting holes drilled on the upper surface of the base plate structure, firstly inject resin slurry through the second vertical grouting pipe and the second horizontal grouting pipe, and then inject flexible grouting material through the first vertical grouting pipe and the first horizontal grouting pipe; inject curtain grouting material through the curtain grouting pipe or the curtain grouting pipe and the third vertical grouting pipe. The construction joint between the base plate structure and the post-casting strip is filled with resin slurry first, and then the flexible grouting material is infiltrated into the filling part and at least penetrates into the surface or interlayer of the waterproof layer to avoid filling the construction joint after injecting the flexible grouting material through the first vertical grouting pipe. The grouting sequence of the water-stop curtain can be carried out before or after the resin slurry and the flexible grouting material of the inclined structure are injected.

[0121] In the construction method of the connection structure of some embodiments, for the anti-leakage structure with grouting holes drilled in the cross-section of the bottom plate structure, the curtain grouting material is first poured through the curtain grouting pipe, and then the resin slurry is poured through the second vertical grouting pipe and the second horizontal grouting pipe, and then the flexible grouting material is poured through the first vertical grouting pipe and the first horizontal grouting pipe. Optionally, it also includes: pouring curtain grouting material through the third vertical grouting pipe. The curtain grouting material in the embodiment of the present application can be selected from highly elastic flexible chemical grouting material, or cement-based grouting material, so as to achieve the minimum requirement of solidifying the soil and increasing the impermeability of the soil.

[0122] The technical solution of the present application is explained in detail below through specific embodiments to make the technical solution clearer and more specific.

[0123] Embodiment 1: A connection structure, including an anti-leakage structure. Figure 3As shown, the anti-leakage structure has an existing area 2 and a newly built area 5 successively distributed along the horizontal plane. The anti-leakage structure includes: a first waterproof structure 1, which is an existing waterproof structure of an existing building structure, corresponding to the existing area 2; the first waterproof structure 1 includes a first cushion layer 21, a waterproof layer 22, a waterproof protective layer 23 and a bottom plate structure 24 stacked from bottom to top in a vertical direction perpendicular to the horizontal plane; a second waterproof structure 3, which is constructed corresponding to the newly built area 5 and is sealed and connected to the first waterproof structure 1 to form a waterproof integrated structure; the second waterproof structure 3 includes a second cushion layer 31, a waterproof roll material layer 32 and a flexible connection layer 34 arranged from bottom to top in the vertical direction; the second cushion layer 31 includes a concave portion 31a that is concave downward, and the second cushion layer 31 The first cushion layer 21 is connected through the recess 31a; the waterproof roll material layer 32 extends and distributes along the upper surface of the second cushion layer 31, and a reserved groove 33 is formed in the recess 31a, and the free end edge of the reserved groove 33 is connected to the end edge of the waterproof layer 22; the flexible connection layer 34 includes a filling part 34a and an interlayer connection part 34b connected in one piece; the filling part 34a fills the reserved groove 33, and the upper end 34a1 of the filling part 34a is connected to the waterproof protective layer 23, and the lower end 34a2 is flush with the upper part of the waterproof roll material layer 32 on the side of the newly built area 5 at the top of the reserved groove 33, forming a slope portion that slopes downward from the first waterproof structure to the second waterproof structure. The interlayer connection part 34b extends and blends in along the gaps between the waterproof layer 22 and the waterproof layer 22 to the first cushion layer 21 and the waterproof protective layer 23. The water-stop curtain 4 includes a first curtain 41 extending from the lower part of the second cushion layer 31 corresponding to the reserved groove 33 to the lower part of the first cushion layer 21 .

[0124] The connection structure also includes: a post-cast strip 6, which is arranged along the direction Y from the existing area 2 to the newly built area 5 to cover at least part of the waterproof roll material layer 32, and the post-cast strip 6 covers part of the filling part 34a and is connected to the bottom plate structure 24; the newly built bottom plate 50 extends along the direction Y from the existing area 2 to the newly built area 5 to cover the waterproof roll material layer 32 not covered by the post-cast strip 6, and is connected to the post-cast strip 6. The post-cast strip 6 is provided with a connecting steel bar 7 extending into the bottom plate structure 24, and the connecting steel bar 7 is formed by the bottom plate steel bar of the newly built bottom plate 50 extending to one side of the bottom plate structure. The cross-sectional part 24a of the bottom plate structure 24 is provided with a cement-based crystalline waterproof coating layer, and the bottom plate structure 24 and the post-cast strip 6 are sealed and connected by resin slurry. An external water stop strip 9 is arranged at the lower part of the connection between the post-cast strip 6 and the newly built bottom plate 50 and between the waterproof roll material layer 32, and an embedded water stop steel plate 8 is arranged at the middle part of the connection between the post-cast strip 6 and the newly built bottom plate 50.

[0125] Embodiment 2: The construction method of the connection structure of Embodiment 1 comprises:

[0126] S1, such as Figure 1As shown, the backfill soil layer 19 on the base plate structure 24 is cleaned and a slope is cut to form a downwardly sloping backfill soil slope in the direction from the upper part of the base plate structure 24 to the newly built area 5.

[0127] S2. Clean the cross-section portion 24a of the bottom plate structure 24 and perform roughening treatment on the cross-section portion 24a of the bottom plate structure 24 so that the cross-section of the bottom plate structure 24 has a rough surface.

[0128] S3, such as Figure 3 As shown, reinforcing bar holes are drilled in the cross-section portion 24a of the bottom plate structure 24 and perpendicular to the cross-section portion 24a of the bottom plate structure into the bottom plate structure 24, and connecting steel bars are arranged in the reinforcing bar holes.

[0129] S4. Apply cement-based penetrating crystalline waterproof coating on the rough surface of the base plate structure 24 to form a cement-based penetrating crystalline waterproof coating layer with a preset thickness of 1 mm.

[0130] S5, such as Figure 1 and Figure 2 As shown, grouting holes 25 are arranged at intervals along the direction X from the newly built area 5 to the existing area 2 and along the length direction Z of the bottom plate structure cross-section part 24a. The grouting holes 25 are arranged in two rows along the direction X from the newly built area 5 to the existing area 2. Grouting holes 25 are drilled on the upper surface of the bottom plate structure 24 from the bottom plate structure 24 to the foundation 17, so that the interval d1 of the grouting holes 25 along the direction X from the newly built area 5 to the existing area 2 and along the length direction Z of the bottom plate structure cross-section part 24a is 800 mm, so that the minimum distance d0 from the grouting holes to the bottom plate structure cross-section part 24a is 500 mm, the two rows of grouting holes are staggered, and curtain grouting pipes 26 are arranged in the grouting holes 25.

[0131] S6, such as Figure 1 As shown, along the horizontal plane from the existing area 2 to the newly built area 5, and along the length direction Z of the bottom plate structure section part 24a, a concave first reserved groove 100 is formed in the foundation 17 at the bottom of the bottom plate structure 24, and the width of the first reserved groove is 500mm.

[0132] S7. Along the length direction Z of the bottom plate structure cross-section part 24a, construct the second cushion layer 31 from the first cushion layer 21, through the upper surface of the first reserved groove 100 from the existing area 2 to the newly built area 5 in the direction Y to form a recessed portion 31a with a width of 350 mm.

[0133] S8, such as Figure 1 and 3As shown, along the length direction Z of the bottom plate structure cross-section portion 24a, a waterproof membrane layer 32 is laid from the waterproof layer 22, through the upper surface of the recessed portion 31a, in the direction Y from the existing area 2 to the newly built area 5 to form a reserved groove 33; the waterproof membrane layer 32 is the pre-laid waterproof membrane APF-700.

[0134] S9. Along the length direction Z of the bottom plate structural section 24a, a first transverse grouting pipe 35 is arranged on the upper surface of the waterproof membrane layer 32 in the reserved groove 33, and a first vertical grouting pipe 36 connected to the first transverse grouting pipe 35 is arranged at intervals of 3 to 6 meters and fixed with the connecting steel bars.

[0135] S10. A second transverse grouting pipe 61 is arranged in the middle of the thickness direction T of the bottom plate structure and along the length direction Z of the cross-sectional portion 24a of the bottom plate structure, and second vertical grouting pipes 62 connected to the second transverse grouting pipe 61 are arranged at intervals, and the second vertical grouting pipes 62 are tied and fixed to the connecting steel bars.

[0136] S11. Use backfill soil to bury the first horizontal grouting pipe 35 and part of the first vertical grouting pipe 36 located in the reserved groove 33, and the filling part 34a is arranged downwardly from the first waterproof structure 1 to the second waterproof structure 3, so that the upper end 34a1 of the filling part 34a is connected to the waterproof protective layer 23, and the lower end 34a2 of the filling part 34a is flush with the upper waterproof membrane layer 32 of the reserved groove 33.

[0137] S12. Forming bottom plate reinforcement in the newly constructed area 5.

[0138] S13, a post-cast strip area is set at the connection between the newly built area 5 and the existing area 2, and an external waterstop strip 9 is set at the connection between the post-cast strip area and the newly built area 5 and on the waterproof membrane layer 32.

[0139] S14, pouring concrete to cover the bottom plate steel bars, and embedding the water-stop steel plate 8 in the middle of the connection between the post-cast strip and the new bottom plate to form a new bottom plate 50.

[0140] S15, pouring concrete in the post-cast strip area to cover the filling portion 34a to form the post-cast strip 6.

[0141] S16. After the concrete poured in the post-cast zone reaches the designed strength, a grouting pump is used to inject epoxy resin grouting liquid into the construction joint between the base plate structure 24 and the post-cast zone 6 through the grouting nozzle from the second vertical grouting pipe 62 and the second horizontal grouting pipe 61 to seal the connection. The grouting is carried out using an electric grouting pump, and a pressure gauge is installed at one end of the grouting pipe. When the grouting amount of each grouting hole section is less than 5L / min and stabilizes for 10 minutes after reaching the designed pressure, the grouting is completed when the water absorption of the grouting hole is less than 1.0L / min per meter, and then the grouting construction of the filling part 34a is carried out.

[0142] S17. Highly elastic and flexible chemical grouting material is poured into the filling part 34a through the first vertical grouting pipe 36 and the first horizontal grouting pipe 35, so that the highly elastic and flexible chemical grouting material infiltrates the filling part 34a and penetrates into the gap between the waterproof layer 22 and the waterproof protective layer 23 to form an interlayer connecting part 34b that is sealed and connected to the waterproof layer 22; the interlayer connecting part 34b is integrally connected to the filling part 34a to form a flexible connecting layer 34.

[0143] S18, injecting highly elastic and flexible chemical grouting material into the foundation 17 from the area below the second cushion layer 31 corresponding to the first cushion layer 21 and the reserved groove 33 to the area below the second cushion layer 31 in the newly built area 5 through the curtain grouting pipe 26 to form a continuous first curtain 41.

[0144] Embodiment 3: A connection structure, which is different from Embodiment 1 in that: Figure 4 As shown, the water-stop curtain 4 also includes a second curtain 42 which is continuously arranged along the length direction Z of the bottom plate structure profile portion 24a, from the lower part of the second cushion layer 31 corresponding to the reserved groove 33 to the lower part of the second cushion layer 31 of the newly built area 5, and the water-stop curtain 4 is composed of the first curtain and the second curtain.

[0145] Embodiment 4: A construction method of the connection structure of Embodiment 3, which differs from Embodiment 2 in that: Figure 4 As shown, it also includes a third vertical grouting pipe 51 pre-buried and spaced along the length direction Z of the bottom plate structure cross-section portion 24a, from the post-cast zone area, and the lower part of the second cushion layer 31 in the newly built area 5 before constructing the second cushion layer 31; and while performing step S18, highly elastic and flexible chemical grouting material is poured into the lower part of the second cushion layer 31 through the third vertical grouting pipe 51 to form a second curtain 42 of the water-stop curtain 4 that is continuously arranged in an area from the lower part of the second cushion layer 31 corresponding to the reserved groove 33 to the lower part of the second cushion layer 31 in the newly built area 5.

[0146] Embodiment 5: A construction method of a connection structure, which differs from Embodiment 2 in that: Figure 5 , Figure 6 and Figure 7 As shown, in step S5, grouting holes 25 are arranged at intervals along the direction X from the newly built area 5 to the existing area 2 and along the length direction Z of the cross-sectional portion 24a of the bottom plate structure 24, and the grouting holes 25 are drilled from the cross-sectional portion 24a of the bottom plate structure 24 deep into the foundation 17, so that the grouting holes and the first cushion layer 21 form a first preset angle of 30°. α, that is, a grouting hole 25 is drilled obliquely downward along the cross-section portion; step S17 is to pour highly elastic and flexible chemical grouting material into the filling part 34a through the first vertical grouting pipe 36 and the first horizontal grouting pipe 35, which needs to be carried out at least before the concrete of the post-casting strip 6 is poured in step S15, so as to pour highly elastic and flexible chemical grouting material into the foundation 17 from the second cushion layer 31 to the first cushion layer 21 corresponding to the reserved groove 33 through the obliquely arranged curtain grouting pipe 26, so as to form the first curtain 41 of the continuous water-stop curtain 4; then the slurry pouring of the second vertical grouting pipe and the first vertical grouting pipe or the third vertical grouting pipe is carried out in sequence.

[0147] The above is only a specific implementation mode of the present application. It can be clearly understood by those skilled in the art that for the convenience and brevity of description, the specific working process described above can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here. It should be understood that the specific embodiments described herein are only intended to explain the present application, rather than to limit the scope of protection of the present application. For those skilled in the art, the present application can be implemented without the need for some of these specific details. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the scope of protection of the present application.

Claims

1. A leakage-proof structure, comprising an existing area (2) and a newly constructed area (5) successively distributed along a horizontal plane, characterized in that: The anti-leakage structure comprises: The first waterproof structure (1) is an existing waterproof structure of an existing building structure, and is distributed corresponding to the existing area (2). The first waterproof structure (1) comprises a first cushion layer (21), a waterproof layer (22) and a bottom plate structure (24) stacked from bottom to top in a vertical direction perpendicular to the horizontal plane. a second waterproof structure (3), constructed corresponding to the newly built area (5) and sealedly connected to the first waterproof structure (1) to form a waterproof integrated structure; the second waterproof structure (3) comprises a second cushion layer (31), a waterproof coiled material layer (32) and a flexible connection layer (34) arranged from bottom to top along the vertical direction; The second cushion layer (31) comprises a recessed portion (31a) sunken downwards, and the second cushion layer (31) is connected to the first cushion layer (21) via the recessed portion (31a); the waterproof roll material layer (32) is extended and distributed along the upper surface of the second cushion layer (31), and a reserved groove (33) is formed in the recessed portion (31a); the free end edge of the waterproof roll material layer (32) in the reserved groove (33) is connected to the end edge of the waterproof layer (22), or the free end edge of the waterproof roll material layer (32) in the reserved groove (33) is located at the lower part of the bottom plate structure (24) and extends toward the existing area (2) to set a first preset length; The flexible connection layer (34) comprises a filling portion (34a) and an interlayer connection portion (34b) which are integrally connected; the filling portion (34a) fills the reserved groove (33), and at least a portion of the filling portion (34a) is connected to the waterproof layer (22) at a height equal to or higher than the waterproof layer (22), and the interlayer connection portion (34b) at least extends along the surface of the waterproof layer (22) or between layers to be integrated; or, the interlayer connection portion (34b) is at least extended along a first preset length between the waterproof coiled material layer (32) and the bottom plate structure (24); The water-stop curtain (4) comprises a first curtain (41) extending from the lower part of the second cushion layer corresponding to the reserved groove (33) to the lower part of the first cushion layer (21).

2. The anti-leakage structure according to claim 1, characterized in that: Meet one or more of the following requirements: 1) The filling portion (34a) slopes downward from the first waterproof structure (1) to the second waterproof structure (3); 2) The free end of the waterproof coiled material layer (32) in the reserved groove (33) is located at the lower part of the base plate structure (24), extends toward the existing area (2) and covers at least a portion of the first cushion layer (21) by a first preset length; 3) The water-stop curtain (4) further comprises a second curtain (42) continuously arranged from the lower part of the second cushion layer (31) corresponding to the reserved groove (33) to the lower part of the newly built area (5); 4) The first waterproof structure (1) further comprises a waterproof protective layer (23), wherein the waterproof protective layer (23) is located between the waterproof layer (22) and the bottom plate structure (24); 5) The width of the reserved groove (33) is ≥300 mm; 6) The waterproof roll material layer (32) is formed by laying self-adhesive pre-laid waterproof roll material.

3. The anti-leakage structure according to claim 2, characterized in that: The filling portion (34a) comprises an upper end (34a1) and a lower end (34a2); the upper end (34a1) is arranged between the waterproof layer (22) and the bottom plate structure (24), and the lower end (34a2) is arranged within the reserved groove (33) and between the portion of the waterproof roll material layer (32) that is higher than the reserved groove (33) and covers the newly built area (5).

4. The anti-leakage structure according to claim 1, characterized in that: The height of the top of the reserved groove (33) at one end of the newly built area (5) is higher than the height of the reserved groove (33) at one end of the existing area (2).

5. The anti-leakage structure according to claim 4, characterized in that: The filling portion (34a) slopes downward from the second waterproof structure (3) to the first waterproof structure (1).

6. The anti-leakage structure according to claim 5, characterized in that: The filling portion (34a) comprises an upper end (34a1) and a lower end (34a2); the lower end (34a2) is arranged between the waterproof layer (22) and the bottom plate structure (24), and the upper end (34a1) is connected to the waterproof roll material layer (32) at least in the reserved groove (33) at a height higher than the lower end (34a2).

7. A construction method of the anti-leakage structure according to any one of claims 1 to 6, characterized in that: include: A first reserved groove is formed in the foundation below the floor structure from the existing area to the newly built area along the horizontal plane; A second cushion layer is constructed from the first cushion layer, through the upper surface of the first reserved groove to the newly built area, to form a recess; a waterproof roll material layer is laid from the waterproof layer or in the existing area, extending into the lower part of the bottom plate structure by a first preset length, through the upper surface of the recess to the newly built area, to form a reserved groove; A filling portion is formed in the reserved groove, so that at least a part of the filling portion is connected to the waterproof layer at a height equal to or higher than the waterproof layer, or connected to the bottom plate structure at a first preset length of the waterproof roll material layer; Using a flexible grouting material to infiltrate the filling part and penetrate at least into the waterproof layer or into the first preset length of the waterproof roll material layer and the base plate structure to form an interlayer connection part that is sealed and connected to the waterproof layer or the base plate structure; the interlayer connection part is integrally connected with the filling part to form a flexible connection layer; A first curtain of a water-stop curtain is formed in an area below the second cushion layer corresponding to the first cushion layer and the reserved groove.

8. The construction method of the anti-leakage structure according to claim 7, characterized in that: One or more of the following conditions are met: 1) Lay a waterproofing membrane layer from the waterproof layer or in the existing area, extending into the lower part of the base structure and covering at least a portion of the first cushion layer by a first preset length, through the upper surface of the recessed portion to the newly-built area; 2) forming a first curtain of water-stop curtains in the area below the second cushion layer corresponding to the first cushion layer and the reserved groove, comprising: arranging grouting holes at intervals in the direction from the new construction area to the existing area of ​​the bottom plate structure and along the length direction of the cross-section of the bottom plate structure, drilling the grouting holes from the bottom plate structure into the foundation, and arranging curtain grouting pipes in the grouting holes; pouring curtain grouting material through the curtain grouting pipe to form a first curtain of water-stop curtains in the area below the second cushion layer corresponding to the first cushion layer and the reserved groove; 3) forming a filling portion in the reserved groove and infiltrating the filling portion with the flexible grouting material, comprising: arranging a first transverse grouting pipe in the reserved groove along the length direction of the bottom plate structure cross-section, and arranging a first vertical grouting pipe connected to the first transverse grouting pipe at intervals; burying the first transverse grouting pipe and at least part of the first vertical grouting pipe in the reserved groove to form the filling portion; pouring flexible grouting material into the filling portion through the first vertical grouting pipe and the first transverse grouting pipe to infiltrate the filling portion with the flexible grouting material; or, filling the reserved groove with backfill soil to form the filling portion, and pouring flexible grouting material into the filling portion by a formwork method; 4) It also includes: before or during the construction of the second cushion layer, a third vertical grouting pipe is arranged at intervals from the lower part of the second cushion layer in the newly built area along the length direction of the bottom plate structure cross-section; Curtain grouting material is poured into the lower part of the second cushion layer through the third vertical grouting pipe to form a second curtain of the water-stop curtain arranged from the lower part of the second cushion layer corresponding to the reserved groove to the lower part of the newly built area.

9. The construction method of the anti-seepage structure according to claim 8, characterized in that: One or more of the following conditions are met: 1) drilling a grouting hole on the upper surface of the bottom plate structure from the bottom plate structure to the foundation; or drilling a grouting hole in the cross-section of the bottom plate structure from the bottom plate structure to the foundation, so that the grouting hole forms a first preset angle α with the first cushion layer, and the first preset angle α satisfies 10°≤α<90°; 2) arranging the grouting holes in rows; 3) Arrange any two adjacent rows of grouting holes in a staggered manner; 4) The intervals between the grouting holes along the direction from the newly built area to the existing area and along the length direction of the bottom plate structural section are 500 mm to 1500 mm; 5) The minimum distance from the grouting hole to the cross-section of the bottom plate structure is 300 mm to 750 mm.

10. The construction method of the anti-leakage structure according to claim 7, characterized in that: Forming a filling portion in the reserved groove includes: making the filling portion tilt downward from the first waterproof structure to the second waterproof structure.

11. The construction method of the anti-leakage structure according to claim 10, characterized in that: The filling part includes an upper end and a lower end; the filling part is tilted downward from the first waterproof structure to the second waterproof structure, including: the upper end is set between the waterproof layer and the bottom plate structure, and the lower end is set in the reserved groove to the part of the waterproof membrane layer that is higher than the reserved groove and covers the newly built area.

12. The construction method of the anti-seepage structure according to claim 7, characterized in that: Forming a filling portion in the reserved groove includes: a height of the top of the reserved groove at one end of the newly-built area is higher than a height of the reserved groove at one end of the existing area.

13. The construction method of the anti-leakage structure according to claim 12, characterized in that: The filling portion includes an upper end and a lower end; the filling portion is inclined downward from the second waterproof structure to the first waterproof structure.

14. The construction method of the anti-leakage structure according to claim 13, characterized in that: The lower end is arranged between the waterproof layer and the bottom plate structure, and the upper end is connected to the waterproof roll material layer at least in the reserved groove at a height higher than the lower end.

15. A connection structure, characterized in that: include: The anti-leakage structure is the anti-leakage structure according to any one of claims 1 to 6, and A post-cast strip (6) is arranged along the direction from the existing area (2) to the newly built area (5) to cover at least a portion of the waterproof roll material layer (32), and the post-cast strip (6) covers the filling portion (34a) and is connected to the base plate structure (24); A newly constructed base plate (50) extends from the existing area (2) to the newly constructed area (5) to cover the waterproofing membrane layer (32) not covered by the post-cast strip (6), and is connected to the post-cast strip (6).

16. The connection structure according to claim 15, characterized in that: Meet at least one of the following requirements: 1) The post-cast strip (6) is provided with connecting steel bars (7) extending into the bottom plate structure; 2) A cement-based crystalline waterproof coating layer is provided on the cross-section portion (24a) where the bottom plate structure (24) is connected to the post-casting strip (6); 3) The base plate structure (24) and the post-casting strip (6) are sealed and connected using resin slurry; 4) An embedded waterproof steel plate (8) is provided between the post-cast strip (6) and the newly built bottom plate (50); 5) An external water stop strip (9) is provided between the lower part of the connection between the post-cast strip (6) and the newly built base plate (50) and the waterproof membrane layer (32).

17. A construction method of the connection structure according to claim 15 or 16, characterized in that: include: The steps of the construction method of the anti-seepage structure according to any one of claims 7 to 14; and, A post-cast zone is provided between the existing zone and the newly constructed zone; forming bottom slab reinforcement in the newly constructed area; During construction, the bottom plate reinforcement is wrapped inside to form a new bottom plate; The filling portion is covered by construction in the post-cast strip area to form a post-cast strip connected to the base plate structure and the newly built base plate.

18. The construction method of the connection structure according to claim 17, characterized in that: Also includes: one or more of the following steps: 1) drilling reinforcing bar holes from the cross-section of the bottom plate structure into the bottom plate structure, and arranging the connecting steel bars in the reinforcing bar holes; 2) performing roughening treatment on the cross-section of the bottom plate structure so that the cross-section of the bottom plate structure has a rough surface; 3) Applying cement-based penetrating crystalline waterproof coating to the cross-section of the base plate structure having a rough surface to form a cement-based penetrating crystalline waterproof coating layer of a preset thickness; 4) The preset thickness of the cement-based penetrating crystalline waterproof coating layer is 0.5 mm to 2 mm; 5) Fixedly connecting the first vertical grouting pipe to the connecting steel bar; 6) A second transverse grouting pipe is arranged from the lower part to the middle part in the thickness direction of the bottom plate structure and along the length direction of the cross-section of the bottom plate structure, and a second vertical grouting pipe connected to the second transverse grouting pipe is arranged at intervals, and the second vertical grouting pipe is fixedly connected to the connecting steel bar; resin slurry is poured between the bottom plate structure and the post-casting strip through the second vertical grouting pipe and the second transverse grouting pipe to seal and connect the bottom plate structure and the post-casting strip; 7) An embedded water-stop steel plate is arranged between the newly built bottom plate and the post-cast strip; 8) An external water stop strip is provided between the connection between the post-cast zone area and the newly built zone and the waterproof membrane layer; 9) For the anti-leakage structure with grouting holes drilled on the upper surface of the bottom plate structure, firstly inject resin slurry through the second vertical grouting pipe and the second horizontal grouting pipe, and then inject flexible grouting material through the first vertical grouting pipe and the first horizontal grouting pipe; inject curtain grouting material through the curtain grouting pipe or the curtain grouting pipe and / or the third vertical grouting pipe; 10) For the anti-leakage structure with grouting holes drilled from the cross-section of the bottom plate structure, firstly, the curtain grouting material is poured through the curtain grouting pipe, and then the resin slurry is poured through the second vertical grouting pipe and the second horizontal grouting pipe; and the flexible grouting material is poured through the first vertical grouting pipe and the first horizontal grouting pipe; 11) For the anti-leakage structure with grouting holes drilled in the section of the bottom plate structure, first pour the curtain grouting material through the curtain grouting pipe, then pour the resin slurry through the second vertical grouting pipe and the second horizontal grouting pipe, and then pour the flexible grouting material through the first vertical grouting pipe and the first horizontal grouting pipe; pour the curtain grouting material through the third vertical grouting pipe.

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