Waterproof structure of open cut underground building

Abstract

The utility model provides a waterproof structure of an open-cut underground building, and relates to the technical field of waterproof of open-cut underground buildings, the open-cut underground building comprises a bottom cushion layer and an enclosure structure, the open-cut underground building comprises a first waterproof roll layer and a second waterproof roll layer, and the first waterproof roll layer and the second waterproof roll layer are sequentially laid on the enclosure structure and the bottom cushion layer; the second waterproof coiled material layer is a back adhesive type self-adhesive film waterproof coiled material, and the second waterproof coiled material layer is adhered to the first waterproof coiled material layer through the self-adhesive side of the second waterproof coiled material layer; the problem that in an open cut underground building waterproof structure in the prior art, double waterproof coiled materials are difficult to compositely apply is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of waterproofing of open-cut underground buildings, and more specifically relates to a waterproofing structure of an open-cut underground building. Background Art

[0002] In response to GB 55030-2022 "General Specification for Waterproofing of Buildings and Municipal Engineering", new emphasis is placed on the waterproofing requirements for underground buildings. The waterproofing method for cast-in-place concrete structures in open-cut underground projects should be no less than three layers, one layer of waterproof concrete, and no less than two layers of waterproof membranes, waterproof coatings, and cement-based waterproof coatings. Based on the optimal mechanism of membrane + membrane composite waterproofing, it is necessary to optimize the waterproofing design of open-cut underground buildings to solve the difficulty of composite application of double-layer waterproof membranes in existing technologies. Utility Model Content

[0003] The purpose of the utility model is to provide an open-cut underground building waterproof structure to address the deficiencies in the prior art, thereby solving the problem that double-layer waterproof membranes are difficult to compositely apply in the open-cut underground building waterproof structure in the prior art.

[0004] In order to achieve the above-mentioned object, the utility model provides a waterproof structure for an open-cut underground building, wherein the open-cut underground building comprises a bottom cushion layer and a surrounding structure, including:

[0005] The first waterproof roll layer and the second waterproof roll layer are laid on the enclosure structure and the bottom cushion layer in sequence, the second waterproof roll layer is a back-adhesive self-adhesive film waterproof roll, and the second waterproof roll layer is bonded to the first waterproof roll layer through its self-adhesive side.

[0006] Optionally, the first waterproof membrane layer is a polymer waterproof membrane.

[0007] Optionally, the first waterproof membrane layer is fixed to the enclosure structure via a hot-melt gasket.

[0008] Optionally, the transparency of the first waterproof membrane layer enables the hot-melt gasket to be visible when it covers the hot-melt gasket.

[0009] Optionally, the second waterproof membrane layer is a back-adhesive polymer self-adhesive film waterproof membrane.

[0010] Optionally, a geotextile layer is laid between the first waterproof roll material layer, the enclosure structure and the bottom cushion layer, and the geotextile layer is fixed to the enclosure structure through the hot-melt gasket.

[0011] Optionally, the second waterproof membrane layer is bonded to the structural side walls and structural bottom plate of the open-cut underground building through its adhesive back side.

[0012] Optionally, a first waterproof protective layer is provided between the structural base plate and the second waterproof membrane layer.

[0013] Optionally, the overlapping edges of the polymer waterproof membrane of the first waterproof membrane layer are welded, and the upper and lower polymer waterproof membranes are staggered.

[0014] Optionally, the second waterproof membrane layer and the first waterproof membrane layer are staggered, and the staggered width is not less than 200 mm.

[0015] The utility model provides a waterproof structure for open-cut underground buildings, which has the beneficial effects of: the waterproof structure for open-cut underground buildings adopts a double-layer waterproof membrane structure of a first waterproof membrane layer and a second waterproof membrane layer to waterproof the open-cut underground buildings and ensure the waterproof effect of the open-cut underground buildings, and the second waterproof membrane layer adopts a back-adhesive self-adhesive film waterproof membrane, which is fully adhered to the first waterproof membrane layer through its self-adhesive side, thereby overcoming the problem that the double-layer waterproof membrane is difficult to be compositely applied in the waterproof structure of open-cut underground buildings, improving the waterproof effect while reducing the construction difficulty.

[0016] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments of the present invention.

[0018] Figure 1 A schematic diagram of an open-cut underground building waterproof structure according to an embodiment of the utility model is shown.

[0019] Figure 2 A schematic diagram of the overlapping structure of a polymer waterproof membrane of a first waterproof membrane layer of an open-cut underground building waterproof structure according to an embodiment of the present utility model is shown.

[0020] Figure 3 A schematic diagram of the overlapping structure of a polymer waterproof membrane of a first waterproof membrane layer of an open-cut underground building waterproof structure according to another embodiment of the present utility model is shown.

[0021] Figure 4 Shown Figure 3 Schematic diagram of the local structure.

[0022] Figure 5 A schematic diagram of the composite structure of an open-cut underground building waterproof structure according to an embodiment of the utility model is shown.

[0023] Description of reference numerals:

[0024] 1. First sheet material; 2. First overlapping edge; 3. First strip welding portion; 4. Flashing portion; 5. Second sheet material; 6. Second overlapping edge; 7. Second strip welding portion; 8. Chamfer; 9. Bottom cushion layer; 10. Enclosure structure; 11. First waterproof membrane layer; 12. Second waterproof membrane layer; 13. Geotextile layer; 14. First waterproof protective layer; 15. Second waterproof protective layer; 16. Structural top plate; 17. Top plate waterproof layer; 18. Surface layer; 19. Structural bottom plate; 20. Structural side wall. DETAILED DESCRIPTION

[0025] The following describes preferred embodiments of the present invention in greater detail. Although preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. Rather, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0026] like Figure 1 As shown, the utility model provides a waterproof structure for an open-cut underground building. The open-cut underground building includes a bottom cushion layer 9 and a protective structure 10, including:

[0027] The first waterproof roll layer 11 and the second waterproof roll layer 12 are laid on the enclosure structure 10 and the bottom cushion layer 9 in sequence. The second waterproof roll layer 12 is a back-adhesive self-adhesive film waterproof roll. The second waterproof roll layer 12 is bonded to the first waterproof roll layer 11 through its self-adhesive side.

[0028] Specifically, in order to solve the problem in the prior art that double-course waterproof membranes are difficult to compositely apply in the waterproof structure of open-cut underground buildings, the open-cut underground building waterproof structure provided by the utility model adopts a double-course waterproof membrane layer structure of a first waterproof membrane layer 11 and a second waterproof membrane layer 12 to waterproof the open-cut underground building and ensure the waterproof effect of the open-cut underground building. The second waterproof membrane layer 12 adopts a back-adhesive self-adhesive film waterproof membrane, which is fully adhered to the first waterproof membrane layer 11 through its self-adhesive side, thereby overcoming the problem that double-course waterproof membranes are difficult to compositely apply in the waterproof structure of open-cut underground buildings, improving the waterproof effect while reducing the difficulty of construction.

[0029] Optionally, the first waterproof membrane layer 11 is a polymer waterproof membrane.

[0030] In this embodiment, the first waterproof membrane layer 11 is a HDPE polymer waterproof membrane.

[0031] Optionally, the first waterproof membrane layer 11 is fixed to the enclosure structure 10 via a hot-melt gasket.

[0032] Specifically, the first waterproof membrane layer 11 is laid on the bottom cushion layer 9 of the open-cut underground building and is welded to the enclosure structure 10 through hot-melt gaskets.

[0033] In this embodiment, the hot melt gasket is a wire mesh hot melt gasket. After the wire mesh hot melt gasket is anchored on the enclosure structure 10, electromagnetic welding can be used to weld the first waterproof membrane layer 11.

[0034] Optionally, the transparency of the first waterproof membrane layer 11 enables the hot-melt gasket to be visible when it covers the hot-melt gasket.

[0035] Specifically, the transparency of the first waterproof membrane layer 11 is set so that after the first waterproof membrane layer 11 is laid, the hot-melt gasket covering it can be seen on the outside, which is convenient for welding and fixing.

[0036] In this embodiment, the first waterproof membrane layer 11 is a high-transmittance HDPE polymer waterproof membrane. The laying of the high-transmittance HDPE polymer waterproof membrane should be gradually advanced from one end along the same direction; the high-transmittance HDPE waterproof membrane is laid flat on the bottom cushion layer 9 without auxiliary fixation. The upper facade of the maintenance structure is assisted by a plum blossom-shaped distributed wire mesh hot-melt gasket for auxiliary fixation.

[0037] Optionally, the second waterproof membrane layer 12 is a back-adhesive polymer self-adhesive film waterproof membrane.

[0038] Specifically, the second waterproof membrane layer 12 also uses a polymer waterproof membrane, a double-layer polymer waterproof membrane, to improve the waterproof effect.

[0039] Optionally, a geotextile layer 13 is laid between the first waterproof roll material layer 11 and the enclosure structure 10 and the bottom cushion layer 9 , and the geotextile layer 13 is fixed to the enclosure structure 10 via hot-melt gaskets.

[0040] Specifically, the geotextile layer 13 is used as a geotextile buffer layer. Before the first waterproof membrane layer 11 is laid, it is first laid on the retaining structure 10 and the bottom cushion layer 9. The geotextile layer 13 on the retaining structure 10 is fixed by a hot-melt gasket, and the cap end of the hot-melt gasket is exposed so as to be welded to the first waterproof membrane layer 11.

[0041] Optionally, the second waterproof membrane layer 12 is bonded to the structural side wall 20 and the structural bottom plate 19 of the open-cut underground building through its back adhesive side.

[0042] Specifically, the second waterproof membrane layer 12 adopts a back-adhesive self-adhesive film waterproof membrane, which is not only convenient for full adhesion with the first waterproof membrane layer 11 through its self-adhesive side, but also convenient for bonding with the concrete structure of the structural side wall 20 and the structural bottom plate 19 of the subsequent open-cut underground building through its back-adhesive side, further improving the waterproofing and construction effects.

[0043] Optionally, a first waterproof protective layer 14 is provided between the structural base plate 19 and the second waterproof membrane layer 12 .

[0044] Specifically, the first waterproof protective layer 14 can be a cement mortar protective layer or a fine stone concrete protective layer, etc., and the back adhesive side of the second waterproof membrane layer 12 can be bonded thereto to achieve a pre-paving and bonding effect.

[0045] In this embodiment, if Figure 1 As shown, the open-cut underground building further includes a structural top plate 16, a top plate waterproof layer 17 is provided on the upper side of the structural top plate 16, a second waterproof protective layer 15 is provided on the upper side of the top plate waterproof layer 17, and a surface layer 18 can also be provided. The surface layer 18 can be backfilled and compacted in layers with plain soil. The materials and structures of the top plate waterproof layer 17 and the second waterproof protective layer 15 can be set as needed, without limitation here.

[0046] Optionally, the overlapping edges of the polymer waterproof membrane of the first waterproof membrane layer 11 are welded, and the upper and lower polymer waterproof membranes are staggered.

[0047] In this embodiment, the overlap width of the high-transparency HDPE polymer waterproof membrane of the first waterproof membrane layer 11 is 100 mm, and a double-seam climbing welding machine is used for welding, and the adjacent two high-transparency HDPE polymer waterproof membranes are left evenly spaced. Figure 2 As shown, the upper and lower pieces of high-transmittance HDPE polymer waterproof membrane should be staggered, and the staggered width should not be less than one-third of the width of the high-transmittance HDPE polymer waterproof membrane.

[0048] In another embodiment, Figure 3 and Figure 4 As shown, the high-transparency HDPE polymer waterproof membrane of the first waterproof membrane layer 11 can also be overlapped by a T-shaped node welding structure, which specifically includes:

[0049] First sheet material 1, two adjacent first sheet materials 1 are overlapped by their first overlapping edges 2, the two overlapping first overlapping edges 2 are connected by a first strip-shaped welding portion 3, and the first sheet material 1 forms a flash portion 4 on the outside of the first strip-shaped welding portion 3;

[0050] A second sheet 5, the second sheet 5 overlaps the second overlapping edge 6 of the first sheet 1, and the second sheet 5 and the second overlapping edge 6 are connected by a second strip-shaped welding portion 7, and the second strip-shaped welding portion 7 is perpendicular to the first strip-shaped welding portion 3;

[0051] The flash portion 4 between the second overlapping edge 6 and the second sheet 5 is cut off;

[0052] A chamfer 8 is provided at the edge of the first sheet 1 that contacts the second sheet 5 .

[0053] The second overlapping edge 6 is welded to the lower side of the second sheet 5 through the second strip welding portion 7; the two overlapping first overlapping edges 2 are connected by two first strip welding portions 3, and the two first strip welding portions 3 are parallel to each other; the first overlapping edge 2 is the long side overlapping edge of the first sheet 1, and the second overlapping edge 6 is the short side overlapping edge of the first sheet 1; the second overlapping edge 6 is overlapped on the long side overlapping edge of the second sheet 5; the second sheet 5 and the second overlapping edge 6 are connected by two second strip welding portions 7, and the two second strip welding portions 7 are parallel to each other. During the construction of such a welded structure: the first sheet 1 and the second sheet 5 are laid, and the two adjacent first sheets 1 are overlapped by their first overlapping edges 2 using a double-seam welder, generating a flash portion 4 during the overlap; at this time, the flash portion 4 on the first sheet 1 is cut off, and a 45° chamfer 8 is cut at the edge of the first sheet 1 that will contact the second sheet 5; then the second sheet 5 is overlapped on the upper side of the second overlapping edge 6 of the first sheet 1, and then the second sheet 5 is welded to the second overlapping edge 6 using a double-seam welder.

[0054] Optionally, the second waterproof membrane layer 12 and the first waterproof membrane layer 11 are staggered, and the staggered width is not less than 200 mm.

[0055] In this embodiment, if Figure 5 As shown, the second waterproof membrane layer 12 serves as the second waterproof membrane. Its bonding position on the first waterproof membrane layer 11 should be staggered with the first waterproof membrane - high-transparency HDPE polymer waterproof membrane, and the staggered width should be not less than 200mm, so as to facilitate welding and overlapping of the next high-transparency HDPE polymer waterproof membrane.

[0056] In summary, the open-cut underground building waterproofing structure provided by the present invention solves the difficulty of double-layer polymer waterproofing membranes being difficult to compositely apply in traditional open-cut underground buildings, such as subway stations, which are excavated using the open-cut method. The first layer of high-transparency HDPE polymer waterproofing membrane is fixed with a wire mesh hot-melt gasket, and the second layer uses a back-adhesive polymer self-adhesive film waterproofing membrane to achieve full bonding with the first layer of high-transparency HDPE polymer waterproofing membrane while retaining the anti-bonding properties with the concrete of the subway station, realizing the composite anti-bonding method of the double-layer polymer waterproofing membrane, and realizing the pre-laid anti-bonding function with the structural concrete under the composite of the double-layer polymer waterproofing membrane of the open-cut subway station; the open-cut underground building waterproofing structure meets the specifications of the double-layer waterproofing membrane of the open-cut subway station, realizes the composite application of the double-layer polymer waterproofing membrane, and retains the traditional pre-laid anti-bonding construction method. While meeting the waterproofing needs, it also simplifies the construction difficulty and improves the construction efficiency.

[0057] While various embodiments of the present invention have been described above, the above description is intended to be illustrative, not exhaustive, and not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A waterproof structure for an open-cut underground building, comprising a bottom cushion layer and a surrounding structure, characterized in that: include: The first waterproof roll layer and the second waterproof roll layer are laid on the enclosure structure and the bottom cushion layer in sequence, the second waterproof roll layer is a back-adhesive self-adhesive film waterproof roll, and the second waterproof roll layer is bonded to the first waterproof roll layer through its self-adhesive side.

2. The open-cut underground building waterproof structure according to claim 1, characterized in that: The first waterproof roll material layer is a polymer waterproof roll material.

3. The open-cut underground building waterproof structure according to claim 1, characterized in that: The first waterproof membrane layer is fixed to the enclosure structure via a hot-melt gasket.

4. The open-cut underground building waterproof structure according to claim 3, characterized in that: The transparency of the first waterproof membrane layer enables the hot-melt gasket to be visible when the first waterproof membrane layer covers the hot-melt gasket.

5. The open-cut underground building waterproof structure according to claim 1, characterized in that: The second waterproof roll material layer is a back-adhesive polymer self-adhesive film waterproof roll material.

6. The open-cut underground building waterproof structure according to claim 3, characterized in that: A geotextile layer is laid between the first waterproof roll material layer, the enclosure structure and the bottom cushion layer, and the geotextile layer is fixed to the enclosure structure through the hot-melt gasket.

7. The open-cut underground building waterproof structure according to claim 1, characterized in that: The second waterproof membrane layer is bonded to the structural side walls and the structural bottom plate of the open-cut underground building through its back adhesive side.

8. The open-cut underground building waterproof structure according to claim 7, characterized in that: A first waterproof protective layer is provided between the structural base plate and the second waterproof membrane layer.

9. The open-cut underground building waterproof structure according to claim 2, characterized in that: The overlapping edges of the polymer waterproof membrane of the first waterproof membrane layer are welded, and the upper and lower polymer waterproof membranes are staggered.

10. The open-cut underground building waterproof structure according to claim 9, characterized in that: The second waterproof membrane layer and the first waterproof membrane layer are staggered, and the staggered width is not less than 200 mm.

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