A horizontal construction joint structure of a guide wall for a shallow-buried underground foundation and its construction method

Abstract

This application relates to the technical field of construction engineering, and in particular to a horizontal construction joint structure and construction method for a shallow-buried underground foundation guide wall. The construction joint structure in this application includes a foundation floor slab, a retaining wall brick formwork, and a structural exterior wall. The structural exterior wall is arranged on the foundation floor slab, and the retaining wall brick formwork is arranged on one side of the foundation floor slab close to the water-facing side. A main waterproof layer is laid between the cushion layer and the foundation floor slab, and an additional waterproof layer is also arranged between the main waterproof layer and the foundation floor slab. An inner keyway is arranged on the upper side of the foundation floor slab, and an outer keyway matching the inner keyway is arranged on the lower side of the structural exterior wall. Water-swelling waterstops are arranged on the upper side of the inner keyway and the lower side of the outer keyway. This application also discloses a construction method for a horizontal construction joint of a shallow-buried underground foundation guide wall. By setting the inner keyway and the outer keyway and combining multiple waterproof structures to extend the water penetration path, this application has the effect of improving the waterproof effect of the horizontal construction joint of the foundation guide wall.

Description

Technical Field

[0001] The present application relates to the technical field of construction engineering, and particularly relates to a horizontal construction joint structure and a construction method thereof for a shallow-buried underground foundation guide wall. Background Art

[0002] A construction joint refers to a joint formed between successively poured concrete during the concrete pouring process due to design requirements or construction needs for segmented pouring. A construction joint is not a real joint. It is just that there is a bonding surface between the previously poured concrete that has exceeded the initial setting time and the subsequently poured concrete, and this bonding surface is called a construction joint.

[0003] The waterproofing at the construction joint is a major problem in design and construction. Especially for the construction joint at the connection between the basement foundation and the underground exterior wall, since the soil will be backfilled on the outside of the underground exterior wall during the later construction, the water in the backfilled soil may penetrate into the basement interior space through the construction joint, affecting the use of the basement.

[0004] The traditional waterproofing structure measure for the horizontal construction joint adopts "external waterproof layer + waterstop steel plate" to cut off the water penetration path and play a waterproofing role. However, the support steel bars of the waterstop steel plate need to be spot-welded to the main reinforcement bars of the structural exterior wall. The tie bars passing through the waterstop steel plate need to be cut and welded to the waterstop steel plate, and additional reinforcing tie bars need to be added. In addition, the quality of the lap welding joints of the waterstop steel plate and the special-shaped welding joints such as the corner type and T-shaped type is difficult to control, reducing the waterproof effect. Summary of the Invention

[0005] In order to solve the above technical problems, the present application provides a horizontal construction joint structure and a construction method thereof for a shallow-buried underground foundation guide wall.

[0006] In the first aspect, a horizontal construction joint structure for a shallow-buried underground foundation guide wall provided by the present application adopts the following technical solution:

[0007] A horizontal construction joint structure for a shallow-buried underground foundation guide wall includes a cushion layer, a foundation slab, a retaining wall brick formwork, and a structural exterior wall. The foundation slab and the retaining wall brick formwork are both arranged on the cushion layer. The structural exterior wall is arranged on the foundation slab. The retaining wall brick formwork is arranged on one side of the foundation slab close to the water-facing side. A main waterproof layer is laid between the cushion layer and the foundation slab, and the main waterproof layer extends to the structural exterior wall. An additional waterproof layer is also arranged between the main waterproof layer and the foundation slab. An inner rabbet is arranged on the upper side of the foundation slab, and an outer rabbet matching the inner rabbet is arranged on the lower side of the structural exterior wall. Water-swelling waterstop strips are arranged on the upper side of the inner rabbet and the lower side of the outer rabbet.

[0008] By adopting the above technical solution, a main waterproof layer and an additional waterproof layer are arranged on the outermost sides of the foundation floor slab and the structural exterior wall to play the first-layer waterproofing role. An inner socket and an outer socket are arranged at the joint of the foundation floor slab and the structural exterior wall, changing the horizontal construction joint at the foundation guide wall into a Z-shaped construction joint, extending the water penetration path, improving the waterproofing effect at the construction joint, and also arranging two water-swelling waterstops. When water penetrates to the water-swelling waterstops, the water-swelling waterstops absorb water and expand to seal the gap between the inner socket and the outer socket, thus further enhancing the waterproofing effect at the construction joint. The waterproofing effect at the construction joint is better through the combined waterproofing structures of multiple channels.

[0009] Optionally, the upper side of the additional waterproof layer extends at least 500 mm onto the structural exterior wall, and the lower side of the additional waterproof layer has a lap width of at least 500 mm with the foundation floor slab; a second protective layer for protecting the main waterproof layer is arranged on the outer side of the structural exterior wall.

[0010] By adopting the above technical solution, the additional waterproof layer can play a better waterproofing role, and the possibility of damage to the main waterproof layer can be reduced by arranging the second protective layer, extending the service life of the main waterproof layer.

[0011] Optionally, a plurality of grooves are formed on one side of the inner socket close to the outer socket, a plurality of protrusions are arranged on the outer socket, the plurality of grooves and the plurality of protrusions are arranged in one-to-one correspondence, and the grooves are matched with the corresponding protrusions; a waterstop for blocking water is arranged between the inner socket and the outer socket, and the waterstop is arranged along the length direction of the structural exterior wall.

[0012] By adopting the above technical solution, the limiting structure with the cooperation of the grooves and the protrusions can, on the one hand, enhance the connection strength between the outer socket and the inner socket, and on the other hand, can further extend the water penetration path, thus improving the waterproofing effect. The waterstop arranged between the inner socket and the outer socket can also play a water-blocking effect.

[0013] Optionally, the waterstop includes a plurality of waterstop units connected in sequence. Each waterstop unit includes a middle water storage section, an upper fixing section and a lower fixing section. The middle water storage section is fixedly connected to the upper fixing section and the lower fixing section respectively. The middle water storage section is parallel to the exterior wall structure and has a water storage cavity formed inside. A plurality of water inlet holes communicating with the water storage cavity are also formed on the middle water storage section; an installation groove for installing the waterstop is formed on one side of the inner socket close to the outer socket.

[0014] By adopting the above technical solution, the middle water storage section, the upper fixed section and the lower fixed section are formed into an I-shaped structure, further extending the water penetration path. And when water penetrates to the position of the water inlet hole, it can flow into the interior of the water storage cavity through the water inlet hole, store a part of the penetrated water, and reduce the amount of water penetrating subsequently.

[0015] Optionally, the port of the water inlet hole near one end of the water storage cavity is lower than the other port of the water inlet hole. First water-permeable cloths are arranged on both sides of the middle water storage section, and both sides of the first water-permeable cloth are respectively connected to the upper fixed section and the lower fixed section.

[0016] By adopting the above technical solution, when water penetrates to the position of the water inlet hole, it can flow into the water storage cavity more smoothly. And a first water-permeable cloth is arranged on the outside, which can reduce the probability of concrete entering the water storage cavity when pouring concrete, so that the water storage cavity can play a role in storing water.

[0017] Optionally, a water blocking groove is opened on one side of the upper fixed section close to the middle water storage section. Two water blocking grooves are arranged and opened along the length direction of the upper fixed section. The two water blocking grooves are symmetrically arranged on both sides of the middle water storage section. A blocking net is arranged at the notch of the water blocking groove, and a second water-permeable cloth is arranged on the side of the blocking net away from the water blocking groove.

[0018] During the process of water penetration in concrete, the fine gaps in the concrete play a capillary action. By adopting the above technical solution, water blocking grooves are arranged on the water penetration path. When concrete is poured, a water blocking cavity can be formed at the position of the water blocking groove, destroying the capillary action of water, thereby reducing the water penetration ability and further improving the waterproof effect.

[0019] Optionally, adjacent water stop units are detachably connected and provided with a connection structure. Connection rings are arranged at both ends of the water stop unit. A sealing groove is opened on one side of the connection ring close to the adjacent water stop unit, and a connection hole is opened on the other side of the connection ring. The connection hole communicates with the sealing groove. The connection structure includes two mutually cooperating semi-circular connectors. The two semi-circular connectors are sleeved at the connection part of adjacent water stop units. An accommodation groove matched with the connection ring is opened on the inner wall of the semi-circular connector. A cavity groove is opened on the bottom wall of the accommodation groove. Communication holes are opened on both inner walls of the cavity groove. The communication holes communicate with the connection holes. A glue injection hole is opened on the semi-circular connector, and the glue injection hole communicates with the cavity groove;

[0020] The sealing groove, the connection hole, the accommodation groove, the cavity groove and the glue injection hole are all filled with water stop glue.

[0021] By adopting the above technical solution, when the semi-moon connecting piece is installed on the water stop unit, the connecting ring can be clamped into the receiving groove, and the communication hole can communicate with the connecting hole. At this time, the sealing groove, the connecting hole, the receiving groove, the cavity groove and the glue injection hole form a cavity. Water stop glue is injected into the cavity through the glue injection hole to fill the gaps in the cavity, so that the semi-moon connecting piece and the water stop unit form an integral body, thereby improving the sealing performance of the connection of the water stop unit.

[0022] Optionally, the water storage cavities in adjacent water stop units are connected; a plurality of water diversion holes are spaced apart in the lower fixed section, the water storage cavity communicates with the plurality of water diversion holes, the water diversion holes are connected with water diversion pipes, and the other ends of the water diversion pipes pass through the outer enterprise opening and extend into the backfill soil.

[0023] By adopting the above technical solution, by providing a water supply pipe, the water in the water storage cavity can be discharged, so that the water storage cavity can continuously store water.

[0024] In a second aspect, a construction method for a horizontal construction joint of a shallow-buried underground foundation guide wall provided by the present application adopts the following technical solution:

[0025] A construction method for a horizontal construction joint of a shallow-buried underground foundation guide wall includes the following steps:

[0026] S1. Foundation construction: Excavate the foundation and pour the cushion layer. According to the design drawings, build the retaining wall brick formwork, lay the main waterproof layer and the additional waterproof layer on the already poured cushion layer. The upper width of the retaining wall brick formwork is reserved with 200mm - 300mm. Pour the first protective layer on the laid main waterproof layer and additional waterproof layer, tie the structural steel bars of the foundation slab and embed the positioning bars.

[0027] S2. Formwork construction: Formwork construction includes foundation slab formwork construction and inner enterprise opening formwork construction. The foundation formwork construction adopts a wooden formwork system, and the inner enterprise opening formwork adopts an aluminum alloy formwork. The inner enterprise opening formwork includes an outer formwork and an inner formwork. Determine the positions of the outer formwork and the inner formwork according to the positioning bars embedded in step S2. Fixing pieces are arranged between the outer formwork and the inner formwork, and concrete is poured to form the foundation slab and the inner enterprise opening.

[0028] S3. Installation of water stop parts: After the concrete reaches the demoulding strength, remove the foundation slab formwork and the inner enterprise opening formwork, chisel and clean the surface of the inner enterprise opening and the upper part of the surface of the foundation slab. Apply waterproof coating on the chiseled surface of the inner enterprise opening, and set water swelling water stop strips; install water stop parts and connection structures, and pour water stop glue into the water stop parts and connection structures.

[0029] S4. Construction of the structural exterior wall: Embed the water diversion pipe, set up the formwork for the structural exterior wall. The formwork for the structural exterior wall adopts a wooden formwork system, and pour the concrete for the structural exterior wall. After the concrete reaches the formwork removal strength, remove the wooden formwork system, lay the main waterproof layer and the additional waterproof layer and lap them with the main waterproof layer and the additional waterproof layer in Step S1, and set up the second protective layer. The joints between the water diversion pipe and the additional waterproof layer, the joints between the water diversion pipe and the main waterproof layer, and the joints between the water diversion pipe and the second protective layer are all sealed.

[0030] By adopting the above technical solutions, through a series of construction processes including foundation construction, formwork construction, installation of water stop parts, and construction of the structural exterior wall, the waterproof effect at the horizontal construction joint of the foundation guide wall can be improved.

[0031] Optionally, the outer formwork includes a formwork body. One side of the formwork body close to the inner formwork is provided with a first convex rib and several second convex ribs. The first convex rib is adapted to the installation groove, and the several second convex ribs are arranged in one-to-one correspondence with several grooves.

[0032] By adopting the above technical solutions, after pouring the concrete, the installation groove and the groove are automatically formed on the surface of the inner socket at one time, thereby improving the construction speed.

[0033] In summary, the present application includes at least one of the following beneficial technical effects:

[0034] 1. The main waterproof layer and the additional waterproof layer are set on the outermost sides of the foundation slab and the structural exterior wall to play the first layer of waterproofing role. Also, an inner socket and an outer socket are set at the connection between the foundation slab and the structural exterior wall, changing the horizontal construction joint at the foundation guide wall into a Z-shaped construction joint, extending the water penetration path, improving the waterproof effect at the construction joint, and also providing two water-swelling water stop strips. When water penetrates to the water-swelling water stop strips, the water-swelling water stop strips absorb water and expand to seal the gap between the inner socket and the outer socket, thereby further enhancing the waterproof effect at the construction joint. Through multiple waterproof structures working together to play the waterproofing role, the waterproof effect at the construction joint is better.

[0035] 2. The limiting structure formed by the cooperation of the groove and the convex block can, on the one hand, enhance the connection strength between the outer socket and the inner socket, and on the other hand, further extend the water penetration path, thereby improving the waterproof effect. The water stop part set between the inner socket and the outer socket can also play a role in blocking water.

[0036] 3. A water blocking groove is set on the water penetration path. After pouring the concrete, a water blocking cavity can be formed at the position of the water blocking groove, destroying the capillary action of water, thereby reducing the water penetration ability and further improving the waterproof effect. Description of the Drawings

[0037] Figure 1It is a schematic cross-sectional structure diagram of the horizontal construction joint structure of the guide wall of the shallow-buried underground foundation in Embodiment 1 of the present application.

[0038] Figure 2 It is a schematic structure diagram of the installation position of the water stop member in Embodiment 2 of the present application.

[0039] Figure 3 It is Figure 2 A partial enlarged structure diagram of part A in

[0040] Figure 4 It is a schematic cross-sectional structure diagram of the water stop member in Embodiment 2 of the present application.

[0041] Figure 5 It is Figure 4 A partial enlarged structure diagram of part B in

[0042] Figure 6 It is a schematic cross-sectional structure diagram of the connection structure in Embodiment 2 of the present application.

[0043] Figure 7 It is a schematic structure diagram of the inner rabbet formwork in Embodiment 2 of the present application.

[0044] Figure 8 It is a schematic structure diagram of the wooden formwork system in Embodiment 2 of the present application.

[0045] Reference numerals: 1, cushion; 11, first protective layer; 2, foundation slab; 21, inner rabbet; 211, groove; 212, installation groove; 221, outer formwork; 2211, formwork body; 2212, first convex rib; 2213, second convex rib; 222, inner formwork; 223, fixing member; 224, positioning bar; 3, retaining wall brick formwork; 4, structural exterior wall; 41, outer rabbet; 411, convex block; 42, second protective layer; 43, wooden formwork system; 431, detachable water-stop screw; 5, main waterproof layer; 6, additional waterproof layer; 7, water-swellable water-stop strip; 8, waterproof coating; 9, water stop member; 91, water stop unit; 911, middle water storage section; 9111, water storage cavity; 9112, water inlet hole; 9113, first permeable cloth; 912, upper fixing section; 9121, water blocking groove; 9122, barrier net; 9123, second permeable cloth; 913, lower fixing section; 9131, water diversion hole; 9132, water diversion pipe; 9133, water retaining ring; 914, connecting ring; 9141, sealing groove; 9142, connecting hole; 92, connection structure; 921, semi-circular connecting piece; 9211, accommodating groove; 9212, cavity groove; 9213, communication hole; 9214, glue injection hole; 9215, water-stop glue. Detailed implementation manners

[0046] The following is combined with the attached Figure 1 To the attached Figure 8, a further detailed description of the present application is given.

[0047] A horizontal construction joint structure of a shallow-buried underground foundation guide wall disclosed in an embodiment of the present application:

[0048] Embodiment 1

[0049] Referring to Figure 1 , a horizontal construction joint structure of a shallow-buried underground foundation guide wall, including a cushion layer 1, a foundation bottom plate 2, a retaining wall brick mold 3, a structural exterior wall 4, a main waterproof layer 5 and an additional waterproof layer 6. The foundation bottom plate 2 and the retaining wall brick mold 3 are both arranged on the cushion layer 1. The retaining wall brick mold 3 is located on the side of the foundation bottom plate 2 close to the water-facing side. The retaining wall brick mold 3 and the foundation bottom plate 2 are in clearance fit. The structural exterior wall 4 is cast on the upper side of the foundation bottom plate 2; the main waterproof layer 5 is laid between the cushion layer 1 and the foundation bottom plate 2, and the additional waterproof layer 6 is laid between the main waterproof layer 5 and the foundation bottom plate 2; an inner keyway 21 is arranged on the upper side of the foundation bottom plate 2, and an outer keyway 41 matching with the inner keyway 21 is arranged on the lower side of the structural exterior wall 4. The inner keyway 21 and the outer keyway 41 are both arranged along the length direction of the structural exterior wall 4. The limiting structure where the inner keyway 21 and the outer keyway 41 cooperate can extend the water penetration path. Water swelling waterstop strips 7 are arranged on the upper side of the inner keyway 21 and the lower side of the outer keyway 41. When the water swelling waterstop strips 7 come into contact with water, they expand to seal the joint between the inner keyway 21 and the outer keyway 41, which can further improve the waterproof ability at the joint of the inner keyway 21 and the outer keyway 41.

[0050] Specifically, referring to Figure 1 , the main waterproof layer 5 is laid on the entire cushion layer 1, and the outer side of the main waterproof layer 5 extends to the uppermost end of the structural exterior wall 4. The upper side of the additional waterproof layer 6 extends at least 500 mm on the structural exterior wall 4, and the lower side of the additional waterproof layer 6 has a lapping width of at least 500 mm with the foundation bottom plate 2, so as to improve the waterproof ability of the main waterproof layer 5 and the additional waterproof layer 6. The main waterproof layer 5 and the additional waterproof layer 6 are closely attached and both use waterproof coiled materials; a first protective layer 11 for protecting the main waterproof layer 5 and the additional waterproof layer 6 is cast on the lower side of the foundation bottom plate 2, and the thickness of the first protective layer 11 is not less than 3 mm, reducing the possibility of damage to the main waterproof layer 5 and the additional waterproof layer 6 caused by subsequent construction; in order to reduce the damage to the main waterproof layer 5 caused by the backfill soil in the later stage, a second protective layer 42 for protecting the main waterproof layer 5 is arranged on the outer side of the structural exterior wall 4. Both the first protective layer 11 and the second protective layer 42 use cement mortar.

[0051] Referring to Figure 1 , in order to further improve the waterproof ability at the joint of the inner keyway 21 and the outer keyway 41, a waterproof coating 8 is applied to the joint of the inner keyway 21 and the outer keyway 41. In this embodiment, the waterproof coating 8 uses a cement-based penetrating crystalline waterproof coating.

[0052] Referring to Figure 1, on one side of the inner enterprise opening 21 close to the foreign enterprise opening 41, a plurality of grooves 211 are formed. A plurality of protrusions 411 are arranged on the foreign enterprise opening 41. The plurality of grooves 211 and the plurality of protrusions 411 are arranged in one-to-one correspondence. In this embodiment, two grooves 211 are provided and the two grooves 211 are symmetrically formed on the side surface of the inner enterprise opening 21. The groove 211 cooperates with the corresponding protrusion 411. By providing the groove 211 and the protrusion 411, on the one hand, the connection strength between the structural exterior wall 4 and the foundation slab 2 can be enhanced, and on the other hand, the penetration path of water can be further extended through the cooperation relationship between the groove 211 and the protrusion 411, thereby further improving the waterproof function of the inner enterprise opening 21 and the foreign enterprise opening 41.

[0053] The implementation principle of the embodiment of the present application is as follows: A multiple waterproof structure is provided. First, the main waterproof layer 5 provided on the outermost side can play a waterproof role. An inner enterprise opening 21 and a foreign enterprise opening 41 are provided at the joint of the structural exterior wall 4 and the foundation slab 2, so that the penetration path of water can be extended. The limiting structure in which the inner enterprise opening 21 and the foreign enterprise opening 41 cooperate can improve the water resistance at the joint of the structural exterior wall 4 and the foundation slab 2, and a water swelling water stop strip 7 is also provided to further enhance the waterproof ability at the joint of the inner enterprise opening 21 and the foreign enterprise opening 41.

[0054] Embodiment 2

[0055] The structure of Embodiment 2 is substantially the same as that of Embodiment 1, except that a water stop member 9 is provided at the junction of the inner enterprise opening 21 and the foreign enterprise opening 41. In this embodiment, the water stop member 9 is made of a corrosion-resistant material. The specific differences are as follows:

[0056] In order to further enhance the water blocking ability at the joint of the inner enterprise opening 21 and the foreign enterprise opening 41, referring to Figure 2 and Figure 3 , a water stop member 9 is also provided between the inner enterprise opening 21 and the foreign enterprise opening 41. The water stop member 9 is arranged at the middle position of the joint of the inner enterprise opening 21 and the foreign enterprise opening 41 and is arranged along the length direction of the structural exterior wall 4. The water stop member 9 includes a plurality of water stop units 91 connected in sequence. Each water stop unit 91 includes a middle water storage section 911, an upper side fixing section 912 and a lower side fixing section 913. The two sides of the middle water storage section 911 are respectively fixedly connected to the upper side fixing section 912 and the lower side fixing section 913. The middle water storage section 911, the upper side fixing section 912 and the lower side fixing section 913 are formed into an I-shaped structure. By providing the water stop member 9 at the joint of the inner enterprise opening 21 and the foreign enterprise opening 41, the penetration path of water can be further extended to block water, thereby enhancing the waterproof ability. In order to facilitate the installation of the water stop member 9, an installation groove 212 for installing the water stop member 9 is formed on one side surface of the inner enterprise opening 21 close to the foreign enterprise opening 41. The installation groove 212 is adapted to the outer contour of the water stop member 9.

[0057] In order to further reduce the amount of water penetrating into the water-swellable waterstop strip 7, referring to Figure 4 and Figure 5 , a water storage cavity 9111 is provided inside the middle water storage section 911, and a number of water inlet holes 9112 communicating with the water storage cavity 9111 are provided on both side surfaces of the middle water storage section 911. When water penetrates into the waterstop member 9 through the gap, it can penetrate into the water storage cavity 9111 through the water inlet holes 9112, thereby reducing the amount of water penetrating subsequently.

[0058] Referring to Figure 5 , the port of the water inlet hole 9112 near the water storage cavity 9111 is lower than the other port of the water inlet hole 9112, so that when water penetrates near the water inlet hole 9112, it can flow into the water storage cavity 9111 more smoothly. First water-permeable cloths 9113 are provided on both sides of the middle water storage section 911, and both sides of the first water-permeable cloth 9113 are fixedly connected to the upper fixed section 912 and the lower fixed section 913 respectively. By providing the first water-permeable cloth 9113, on the one hand, the possibility of concrete pouring into the water storage cavity 9111 can be reduced, and on the other hand, water can also enter the water storage cavity 9111 through the first water-permeable cloth 9113.

[0059] Referring to Figure 5 , a water blocking groove 9121 is provided on the upper fixed section 912. The water blocking groove 9121 is provided on the side surface of the upper fixed section 912 close to the middle water storage section 911. The water blocking groove 9121 is provided with two and is opened along the length direction of the upper fixed section 912. The two water blocking grooves 9121 are symmetrically arranged on both sides of the middle water storage section 911. In order to reduce the entry of concrete into the water blocking groove 9121 during concrete pouring, a blocking net 9122 is fixedly provided at the notch of the water blocking groove 9121, and a second water-permeable cloth 9123 is provided on the side of the blocking net 9122 away from the water blocking groove 9121. When the concrete pouring is completed, a water blocking cavity is formed in the water blocking groove 9121. When water penetrates to the position of the water blocking cavity, there is a cavity larger than the penetration gap in the penetration route of the water. The existence of the water blocking cavity can reduce the capillary action of water, thereby reducing the water penetration ability.

[0060] Referring to Figure 4 and Figure 6, for the convenience of connecting adjacent water stop units 91, the adjacent water stop units 91 are detachably connected and provided with a connecting structure 92, and the water storage cavities 9111 in the adjacent water stop units 91 are communicated with each other; both ends of the water stop unit 91 are provided with connecting rings 914, and the connecting rings 914 are formed into a closed-loop structure around the middle water storage section 911, the upper fixed section 912 and the lower fixed section 913. A sealing groove 9141 is opened on one side of the connecting ring 914 close to the end face of the adjacent water stop unit 91, and the sealing groove 9141 is opened along the outer contour of the connecting ring 914. A plurality of connecting holes 9142 are opened on the other side of the connecting ring 914, and the plurality of connecting holes 9142 are all communicated with the sealing groove 9141. The connecting structure 92 includes two mutually matching semi-circular connecting members 921. The two semi-circular connecting members 921 are sleeved at the connection part of the adjacent water stop units 91 and fixed by bolts. An accommodating groove 9211 matching with the connecting ring 914 is opened on the inner wall of the semi-circular connecting member 921, and the connecting ring 914 is clamped in the accommodating groove 9211. A cavity groove 9212 is opened on the bottom wall of the accommodating groove 9211, and a plurality of communicating holes 9213 are opened on both inner walls of the cavity groove 9212. The plurality of connecting holes 9142 and the plurality of communicating holes 9213 are arranged in one-to-one correspondence, and the communicating holes 9213 are communicated with the corresponding connecting holes 9142. A glue injection hole 9214 is opened on the semi-circular connecting member 921, and the glue injection hole 9214 is communicated with the cavity groove 9212. After the water stop member 9 is installed, water stop glue 9215 is injected into the glue injection hole 9214 until the water stop glue 9215 fills the sealing groove 9141, the connecting holes 9142, the cavity groove 9212 and the glue injection hole 9214. By setting the injection of water stop glue 9215 into the connecting structure 92, the sealing performance of the adjacent water stop units 91 can be improved.

[0061] As the amount of water in the water storage cavity 9111 increases, the water storage capacity of the water storage cavity 9111 gradually weakens. In order to enable the water storage cavity 9111 to continuously store water, referring to Figure 3 and Figure 5 , a plurality of water diversion holes 9131 are opened in the lower fixed section 913. The plurality of water diversion holes 9131 are spaced apart in the lower fixed section 913 and are all communicated with the water storage cavity 9111. Each water diversion hole 9131 is connected with a water diversion pipe 9132. The other end of the water diversion pipe 9132 passes through the outer enterprise opening 41 and extends into the backfill soil. In this embodiment, the water diversion pipe 9132 can be led into a sump or a sewer pipe. Waterproof coiled materials are pasted and cement-based penetrating crystalline waterproof coating is applied at the joints of the water diversion pipe 9132 with the main waterproof layer 5, the additional waterproof layer 6 and the second protective layer 42, so as to improve the sealing performance at the joints of the water diversion pipe 9132 with the main waterproof layer 5, the additional waterproof layer 6 and the second protective layer 42, and the end of the water diversion pipe 9132 extending into the backfill soil can be led into a sump for recovery.

[0062] Referring to Figure 4 andFigure 5 On the outer side wall of the water inlet pipe 9132, a number of water retaining rings 9133 are provided. The number of water retaining rings 9133 are sleeved on the water inlet pipe 9132 at intervals, and all the water retaining rings 9133 are located inside the outer enterprise opening 41. By providing the water retaining rings 9133, the water retaining ability at the joint between the water inlet pipe 9132 and the outer enterprise opening 41 can be enhanced.

[0063] The implementation principle of the embodiment of the present application is as follows: A water stop member 9 is added at the junction of the inner enterprise opening 21 and the outer enterprise opening 41 to further enhance the waterproof ability at the construction joint; a water storage cavity 9111 is provided in the middle water storage section 911 to store the water that penetrates to the water inlet hole 9112, thereby reducing the amount of water seepage to the next place, and a water inlet pipe 9132 is provided, and the water storage cavity 9111 can continuously maintain the water storage ability; after the concrete of the structural external wall 4 is poured, the water blocking groove 9121 can form a water blocking cavity to reduce the capillary action of water, and further reduce the water penetration ability; a connection structure 92 is provided at the connection of adjacent water stop units 91. By opening a sealing groove 9141, a connection hole 9142, a cavity groove 9212 and a glue injection hole 9214, and injecting a water stop glue 9215, the sealing performance at the connection of adjacent water stop units 91 can be improved.

[0064] The embodiment of the present application also discloses a construction method for a horizontal construction joint of a shallow-buried underground foundation guide wall. The construction method includes the following steps:

[0065] S1. Foundation construction: Refer to Figure 7 , excavate the foundation and pour the cushion layer 1. According to the design drawing, build the retaining wall brick mold 3, lay the main waterproof layer 5 and the additional waterproof layer 6 on the poured cushion layer 1. The upper side width of the retaining wall brick mold 3 is reserved 250mm. Pour the first protective layer 11 on the laid main waterproof layer 5 and additional waterproof layer 6, bind the structural steel bars of the foundation slab 2 and embed the positioning bars 224;

[0066] S2. Formwork construction: Refer to Figure 7 and Figure 8 , the formwork construction includes the formwork construction of the foundation slab and the formwork construction of the inner enterprise opening. The formwork construction of the foundation uses a wooden formwork system 43, and the formwork of the inner enterprise opening uses an aluminum alloy formwork. The formwork of the inner enterprise opening includes an outer formwork 221 and an inner formwork 222. Determine the positions of the outer formwork 221 and the inner formwork 222 according to the positioning bars 224 embedded in step S2. A fixing member 223 is provided between the outer formwork 221 and the inner formwork 222. In this embodiment, the fixing member 223 uses an angle iron, and pour the concrete to form the foundation slab 2 and the inner enterprise opening 21;

[0067] S3. Installation of the water stop member 9: Refer to Figure 6 and Figure 8, after the concrete reaches the form removal strength, remove the formwork of the foundation slab and the inner keyway formwork, roughen the surface of the inner keyway 21 and the upper side part of the surface of the foundation slab 2 and clean and moisten it with water. Apply a cementitious capillary crystalline waterproof coating 8 on the roughened surface of the inner keyway 21, set a water-swelling waterstop strip 7. The swelling waterstop strip uses a putty-type water-swelling waterstop strip 7. The swelling surface of the water-swelling waterstop strip 7 is set downward, and the water-swelling waterstop strip 7 is fixed by stainless steel nails with a spacing of 800-1000 mm; install the waterstop member 9 and the connecting structure 92, and pour the waterstop glue 9215 into the waterstop member 9 and the connecting structure 92 through the grouting hole 9214 until the waterstop glue 9215 overflows from the grouting hole 9214;

[0068] S4. Construction of the structural exterior wall 4: Refer to Figure 2 and Figure 8 , embed the water diversion pipe 9132, set up the formwork of the structural exterior wall 4. The formwork of the structural exterior wall 4 adopts a wooden formwork system 43, and uses a detachable waterstop screw 431 to support the wooden formwork system 43. A square waterstop steel ring is fully welded in the middle of the detachable waterstop screw 431. Pour the concrete of the structural exterior wall 4. After the concrete reaches the form removal strength, remove the wooden formwork system 43, lay the main waterproof layer 5 and the additional waterproof layer 6 and lap them with the main waterproof layer 5 and the additional waterproof layer 6 in step S1, and set the second protective layer 42; the joints of the water diversion pipe 9132 with the additional waterproof layer 6, the joints of the water diversion pipe 9132 with the main waterproof layer 5, and the joints of the water diversion pipe 9132 with the second protective layer 42 are sealed, and waterproof coiled materials are pasted and a cementitious capillary crystalline waterproof coating 8 is applied.

[0069] Refer to Figure 3 and Figure 7 , the outer formwork 221 includes a formwork body 2211. A first convex rib 2212 and two second convex ribs 2213 are provided on one side of the formwork body 2211 close to the inner formwork 222. The first convex rib 2212 is adapted to the installation groove 212, and a number of second convex ribs 2213 are arranged in one-to-one correspondence with a number of grooves 211. Through the limiting structure of the first convex rib 2212 and the second convex rib 2213, when the concrete is poured, the surface of the inner keyway 21 can be automatically formed with the installation groove 212 and the groove 211 at one time, which can improve the construction speed.

[0070] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. The same components are represented by the same reference numerals. Therefore: All equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A horizontal construction joint structure of a guide wall for a shallow-buried underground foundation, characterized in that, It includes a cushion layer (1), a foundation floor slab (2), a retaining wall brick formwork (3) and a structural exterior wall (4). The foundation floor slab (2) and the retaining wall brick formwork (3) are both arranged on the cushion layer (1), the structural exterior wall (4) is arranged on the foundation floor slab (2), the retaining wall brick formwork (3) is arranged on one side of the foundation floor slab (2) close to the water-facing side. A main waterproof layer (5) is laid between the cushion layer (1) and the foundation floor slab (2), and the main waterproof layer (5) extends onto the structural exterior wall (4). An additional waterproof layer (6) is also arranged between the main waterproof layer (5) and the foundation floor slab (2); an internal rabbet (21) is arranged on the upper side of the foundation floor slab (2), and an external rabbet (41) matching the internal rabbet (21) is arranged on the lower side of the structural exterior wall (4). Water swellable waterstop strips (7) are arranged on the upper side of the internal rabbet (21) and the lower side of the external rabbet (41); a plurality of grooves (211) are formed on one side of the internal rabbet (21) close to the external rabbet (41), a plurality of bumps (411) are arranged on the external rabbet (41), the plurality of grooves (211) and the plurality of bumps (411) are arranged in one-to-one correspondence, and the grooves (211) are matched with the corresponding bumps (411); a waterstop member (9) for blocking water is arranged between the internal rabbet (21) and the external rabbet (41), and the waterstop member (9) is arranged along the length direction of the structural exterior wall (4).

2. The horizontal construction joint structure of the guide wall for a shallow-buried underground foundation according to claim 1, characterized in that, The upper side of the additional waterproof layer (6) extends onto the structural exterior wall (4) by at least 500 mm, and the overlapping width between the lower side of the additional waterproof layer (6) and the foundation floor slab (2) is at least 500 mm; a second protective layer (42) for protecting the main waterproof layer (5) is arranged on the outer side of the structural exterior wall (4).

3. A horizontal construction joint structure of a guide wall for a shallow buried underground foundation according to claim 1, characterized in that, The waterstop member (9) includes a plurality of waterstop units (91) connected in sequence. The waterstop unit (91) includes a middle water storage section (911), an upper fixing section (912) and a lower fixing section (913). The middle water storage section (911) is fixedly connected to the upper fixing section (912) and the lower fixing section (913) respectively. The middle water storage section (911) is parallel to the exterior wall structure and has a water storage cavity (9111) formed inside. A plurality of water inlet holes (9112) communicating with the water storage cavity (9111) are also formed on the middle water storage section (911); an installation groove (212) for installing the waterstop member (9) is formed on one side of the internal rabbet (21) close to the external rabbet (41).

4. A horizontal construction joint structure of a guide wall for a shallow-buried underground foundation according to claim 3, characterized in that, The port of one end of the water inlet hole (9112) close to the water storage cavity (9111) is lower than the other port of the water inlet hole (9112). First permeable cloths (9113) are arranged on both sides of the middle water storage section (911), and both sides of the first permeable cloth (9113) are connected to the upper fixing section (912) and the lower fixing section (913) respectively.

5. The horizontal construction joint structure of the guide wall for shallow buried underground foundation according to claim 4, characterized in that, On one side of the upper fixing section (912) close to the middle water storage section (911), a water blocking groove (9121) is formed. Two water blocking grooves (9121) are provided and are formed along the length direction of the upper fixing section (912). The two water blocking grooves (9121) are symmetrically arranged on both sides of the middle water storage section (911). A blocking net (9122) is arranged at the notch of the water blocking groove (9121). A second water permeable cloth (9123) is arranged on the side of the blocking net (9122) away from the water blocking groove (9121).

6. The horizontal construction joint structure of the guide wall for shallow buried underground foundation according to claim 3, characterized in that, Adjacent water stop units (91) are detachably connected and provided with a connection structure (92). Connection rings (914) are arranged at both ends of the water stop unit (91). A sealing groove (9141) is formed on one side of the connection ring (914) close to the adjacent water stop unit (91). A connection hole (9142) is formed on the other side of the connection ring (914). The connection hole (9142) communicates with the sealing groove (9141). The connection structure (92) includes two mutually cooperating semi-circular connectors (921). The two semi-circular connectors (921) are sleeved at the connection part of the adjacent water stop units (91). A receiving groove (9211) matched with the connection ring (914) is formed on the inner wall of the semi-circular connector (921). A cavity groove (9212) is formed on the bottom wall of the receiving groove (9211). Communication holes (9213) are formed on both inner walls of the cavity groove (9212). The communication holes (9213) communicate with the connection hole (9142). A glue filling hole (9214) is formed on the semi-circular connector (921). The glue filling hole (9214) communicates with the cavity groove (9212); The sealing groove (9141), the connection hole (9142), the receiving groove (9211), the cavity groove (9212) and the glue filling hole (9214) are all filled with water stop glue (9215).

7. The horizontal construction joint structure of the guide wall for shallow buried underground foundation according to claim 6, characterized in that, The water storage cavities (9111) in the adjacent water stop units (91) communicate with each other; a plurality of water diversion holes (9131) are spaced apart in the lower fixing section (913). The water storage cavity (9111) communicates with the plurality of water diversion holes (9131). A water diversion pipe (9132) is connected to the water diversion hole (9131). The other end of the water diversion pipe (9132) passes through the foreign enterprise opening (41) and extends into the backfill soil.

8. A construction method for the horizontal construction joint structure of the guide wall of a shallow-buried underground foundation, based on the horizontal construction joint structure of the guide wall of the shallow-buried underground foundation described in any one of claims 1-7, characterized in that, Including the following steps: S1. Foundation construction: Excavate the foundation and pour the cushion layer (1). According to the design drawings, build the retaining wall brick mold (3), lay the main waterproof layer (5) and the additional waterproof layer (6) on the poured cushion layer (1). The upper width of the retaining wall brick mold (3) is reserved with 200 mm to 300 mm. Pour the first protective layer (11) on the laid main waterproof layer (5) and additional waterproof layer (6). Bind the structural steel bars of the foundation slab (2) and embed the positioning bars (224); S2. Formwork construction: The formwork construction includes the formwork construction of the foundation slab (2) and the formwork construction of the internal keyway (21). The formwork construction of the foundation uses a wooden formwork system (43), and the formwork of the internal keyway (21) uses an aluminum alloy formwork. The formwork of the internal keyway (21) includes an outer formwork (221) and an inner formwork (222). The positions of the outer formwork (221) and the inner formwork (222) are determined according to the positioning bars (224) embedded in step S2. A fixing member (223) is arranged between the outer formwork (221) and the inner formwork (222). Concrete is poured to form the foundation slab (2) and the internal keyway (21). S3. Installation of the water stop member (9): After the concrete reaches the formwork removal strength, the formwork of the foundation slab (2) and the formwork of the internal keyway (21) are removed. The surface of the internal keyway (21) and the upper part of the surface of the foundation slab (2) are roughened and cleaned. A waterproof coating (8) is applied to the roughened surface of the internal keyway (21), and a water swelling water stop strip (7) is set; the water stop member (9) and the connecting structure (92) are installed, and a water stop glue (9215) is poured into the water stop member (9) and the connecting structure (92). S4. Construction of the structural exterior wall (4): The water diversion pipe (9132) is embedded, and the formwork of the structural exterior wall (4) is supported. The formwork of the structural exterior wall (4) uses a wooden formwork system (43), and the concrete of the structural exterior wall (4) is poured; after the concrete reaches the formwork removal strength, the wooden formwork system (43) is removed, the main waterproof layer (5) and the additional waterproof layer (6) are laid and lapped with the main waterproof layer (5) and the additional waterproof layer (6) in step S1, and the second protective layer (42) is set; the joints of the water diversion pipe (9132) with the additional waterproof layer (6), the joints of the water diversion pipe (9132) with the main waterproof layer (5), and the joints of the water diversion pipe (9132) with the second protective layer (42) are all sealed.

9. The construction method of a construction joint structure of a guide wall for a shallow buried underground foundation in the horizontal direction according to claim 8, characterized in that, The outer formwork (221) includes a formwork body (2211). A first convex rib (2212) and a plurality of second convex ribs (2213) are arranged on one side of the formwork body (2211) close to the inner formwork (222). The first convex rib (2212) is adapted to the installation groove (212), and the plurality of second convex ribs (2213) are arranged in one-to-one correspondence with a plurality of grooves (211).

Images