Advanced sealing structure of temperature post-cast strip on basement outer wall and raft
By setting up integrated enclosed steel plates on the basement exterior wall and raft slabs, combining retractable wrinkles and bending plates to form an integral steel bar structure system, the problems of rainwater entering and cracking of waterproof layer in the existing technology are solved, and effective Advance closure and accelerated construction progress.
Patent Information
- Application Number
- CN202421235780.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-03
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-06-03
AI Technical Summary
The prior art is difficult to effectively prevent rainwater from entering the outside opening of the basement rear-watering belt during construction, and the construction of the retaining wall is time-consuming and labor-intensive, and it is easy to cause cracking of the waterproof layer and potential leakage risks.
The steel plate is enclosed with integrated enclosed raft rear pouring belt and the outer port of the basement exterior wall pouring belt. The steel plate is equipped with retractable wrinkles and inward inclined bend plates, and welded to connect to the raft and wall. The inner longitudinal main rib forms an integral steel bar framework system, which expands and contracts simultaneously with temperature changes to achieve advanced closure.
It effectively prevents rainwater from entering the basement, while ensuring the telescopic function of the rear pouring belt, avoiding the hidden dangers of cracking and leakage of the waterproof layer, and speeding up the construction progress.
Smart Images
Figure CN222435357U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a post-cast strip of a basement shear wall, in particular to an advanced sealing method for a temperature post-cast strip on an outer wall and a raft slab of a basement. Background Art
[0002] In some super-long cast-in-place concrete structures, such as the basement outer walls and the concrete raft slabs under the outer walls of structures such as stadiums, temperature post-cast strips are provided to prevent harmful cracks caused by the uneven shrinkage of reinforced concrete structures. The width of the temperature post-cast strips is 800-1000 mm. According to the requirements of the specifications, the concrete on both sides of the temperature post-cast strips is poured and sealed for the second time after the main structure is completed; since the basements are all located in the foundation pit, the post-cast strips on the outer walls of the basement shear walls are in the soil at the side of the foundation pit. In order to prevent rainwater in the foundation pit from entering the basement of the main structure through the post-cast strips, the usual practice is to advance the closure of the outer opening of the basement post-cast strips and perform backfilling operations; for the advance closure of the outer opening of the basement post-cast strips, the existing technology mostly adopts the structural form of masonry retaining walls to complete it, that is, a retaining wall is built on the outer side of the basement post-cast strips, so that the inner wall facades at both ends of the retaining wall are connected to the two sides of the post-cast strips The exterior facade of the basement concrete wall is connected together to achieve the closure of the outer opening of the post-cast strip. Then, plastering, waterproofing and extruded polystyrene waterproofing protective layers are applied to the outside of the closed masonry wall. Finally, backfilling is performed to complete the sealing of the outer side of the basement post-cast strip. However, this construction method has the following problems: (1) The construction of the retaining wall is time-consuming and labor-intensive, and the wall strength is limited. At the same time, the expansion and contraction of the masonry wall and the cast-in-place concrete on both sides are not synchronized, which hinders the full expansion and contraction function of the post-cast strip. (2) Since a flexible extruded polystyrene waterproofing protective layer is provided on the outside of the masonry wall, the connection between the masonry wall and the cast basement shear wall is prone to expansion and deformation during the later concrete closure pouring of the post-cast strip, resulting in cracks in the waterproofing layer on the outside of the wall, which pre-buries the hidden danger of water leakage in the basement. How to ensure the function of the temperature post-cast strip and prevent rainwater from entering the basement during construction has become a problem that needs to be solved during construction. Summary of the invention
[0003] The utility model provides an advanced sealing structure for the temperature post-cast strips on the basement outer wall and raft slab, which effectively ensures the function of the temperature post-cast strips and avoids cracking of the waterproof layer during secondary concrete pouring after the outer opening of the temperature post-cast strips is sealed.
[0004] The utility model solves the above technical problems through the following technical solutions:
[0005] The overall concept of the utility model is: according to the designed width of the raft slab post-casting strip and the basement outer wall post-casting strip, an outer port closed steel plate is manufactured to seal the outer port of the raft slab post-casting strip and the outer port of the basement outer wall post-casting strip; on the outer port closed steel plate, folds which can be laterally extended and retracted along the left and right directions are arranged along the vertical directions; a left side bent plate inclined inwardly is arranged at the left end of the outer port closed steel plate; a right side bent plate inclined inwardly is arranged at the right end of the outer port closed steel plate; the material of the outer port closed steel plate is the same as that of the longitudinal main reinforcement in the outer wall; after the reinforcement in the raft slab on both sides of the cast-in strip and the reinforcement in the basement outer wall are tied, the manufactured outer port closed steel plate is The port-sealed steel plate is arranged at the outer port of the designed post-cast strip, and the left and right bent plates are welded together with the outermost raft slab steel bars and the basement outer wall steel bars, so that the outer port-sealed steel plate, the longitudinal main bars in the raft slab and the longitudinal main bars in the outer wall become an integral steel frame system, which expands and contracts synchronously with the temperature change; then, the concrete on both sides of the post-cast strip and the basement wall is poured, and the bent plates on both sides of the outer port-sealed steel plate are poured in the wall concrete, so that the outer port of the post-cast strip is closed in advance, and the full play of the temperature expansion and contraction function of the post-cast strip is guaranteed. At the same time, the phenomenon of mold expansion and leakage that is easy to occur during the secondary pouring of the post-cast strip in the later stage is overcome.
[0006] The invention discloses an advanced sealing structure of a temperature post-casting strip on a basement outer wall and a raft slab, comprising a raft slab post-casting strip, a basement outer wall post-casting strip arranged above the raft slab post-casting strip, a raft slab inner longitudinal main reinforcement arranged in the space of the precast raft slab on both sides of the raft slab post-casting strip, an outer wall inner longitudinal main reinforcement arranged in the space of the precast basement outer wall on both sides of the basement outer wall post-casting strip, an outer port sealing steel plate arranged on the outer ports of the basement outer wall post-casting strip and the raft slab post-casting strip, the cross section of the outer port sealing steel plate being in a zigzag shape, and the outer port sealing steel plate connects the outer port of the basement outer wall post-casting strip and the raft slab post-casting strip. The outer port of the post-cast strip of the slab is integrally closed; on the steel plate with the outer port closed, wrinkles that can be laterally extended and retracted in the left and right directions are arranged along the up and down vertical directions, an inwardly inclined left side bent plate is arranged at the left end of the steel plate with the outer port closed, and an inwardly inclined right side bent plate is arranged at the right end of the steel plate with the outer port closed, the inner end of the left side bent plate is respectively welded to the outermost raft slab inner longitudinal main reinforcement and the outermost outer wall inner longitudinal main reinforcement, and the inner end of the right side bent plate is respectively welded to the outermost raft slab inner longitudinal main reinforcement and the outermost outer wall inner longitudinal main reinforcement.
[0007] Basement exterior wall formwork is supported on both sides of the basement exterior wall post-cast strip, vertical wooden slats are arranged on the basement exterior wall formwork, a pair of horizontal steel pipes are arranged on the vertical wooden slats, and tension bolts are used to pull and fix the two basement exterior wall formworks together through a pair of horizontal steel pipes.
[0008] Concrete is poured in the basement exterior wall formwork, and the left-side bent plate and the right-side bent plate are both poured in the basement exterior wall concrete.
[0009] A method for pre-sealing a temperature post-casting strip on a basement outer wall and a raft slab comprises a raft slab post-casting strip, a basement outer wall post-casting strip is arranged above the raft slab post-casting strip, a raft slab inner longitudinal main reinforcement is arranged in the precast raft slab space on both sides of the raft slab post-casting strip, and an outer wall inner longitudinal main reinforcement is arranged in the precast basement outer wall space on both sides of the basement outer wall post-casting strip, characterized by the following steps:
[0010] The first step is to manufacture an outer port closed steel plate for closing the outer ports of the raft slab post-casting strip and the outer ports of the basement outer wall post-casting strip according to the width of the raft slab post-casting strip and the basement outer wall post-casting strip. The outer port closed steel plate is provided with folds that can be laterally extended and retracted in the left and right directions along the vertical direction. A left side bent plate inclined inwardly is provided at the left end of the outer port closed steel plate, and a right side bent plate inclined inwardly is provided at the right end of the outer port closed steel plate. The material of the outer port closed steel plate is the same as that of the longitudinal main reinforcement in the outer wall.
[0011] The second step is to set the outer port closing steel plate on the outer port of the raft slab post-casting strip and the outer port of the basement outer wall post-casting strip, and respectively weld the inner end of the left bent plate to the outermost raft slab inner longitudinal main reinforcement and the outermost outer wall inner longitudinal main reinforcement, and respectively weld the inner end of the right bent plate to the outermost raft slab inner longitudinal main reinforcement and the outermost outer wall inner longitudinal main reinforcement, so that the outer port closing steel plate, the raft slab inner longitudinal main reinforcement and the outer wall inner longitudinal main reinforcement are connected into an integral steel frame system; the outer ports of the two post-casting strips are closed in advance by the outer port closing steel plate;
[0012] Step 3: Install two water-stop steel plates between the post-cast strip of the basement exterior wall and the pre-cast wall space;
[0013] Step 4: Support the wall casting formwork system on both sides of the basement exterior wall post-casting strip, and set the left bent plate and the right bent plate in the wall casting space on both sides of the basement exterior wall post-casting strip;
[0014] Step 5: pour the concrete of the walls on both sides of the post-cast strip of the basement exterior wall and the raft slab on both sides of the post-cast strip of the raft slab at one time;
[0015] Step 6: After the poured concrete is finally set, remove the wall casting formwork system;
[0016] Step 7: Build the main structure above the basement exterior wall.
[0017] After the sixth step is completed, a waterproof layer is applied between the outer facades of the walls on both sides of the cast basement outer wall post-cast strip and the outer facades of the outer port closed steel plate, and an extruded polystyrene board waterproof protective layer is set, and finally, backfilling is carried out.
[0018] On the inner side of the steel plates closing the outer ports on both sides of the wrinkles, tension bolt connection sleeves are provided. After the main structure on the outer wall of the basement is completed, an inner formwork is supported to close the inner port of the post-cast strip of the basement outer wall, and the outer ends of the tension bolts are connected to the sleeves to fix the inner formwork. Then, concrete is poured for the second time to fill and close the post-cast strip of the basement outer wall and the raft slab.
[0019] The utility model effectively solves the problems of leakage, mold expansion and deformation that are easy to occur during the secondary concrete pouring process of the temperature post-casting strip on the outer wall of the basement. By pre-implanting the advanced closed steel plate into the wall and the steel bar system in the raft slab on both sides of the post-casting strip, it is ensured that the closed steel plate of the post-casting strip expands and contracts synchronously with the steel bars in the wall with the temperature, and the role of the post-casting strip is fully played. At the same time, the stability and safety of the waterproof layer outside the closed steel plate are protected, the early backfilling of the backfill soil outside the closed steel plate is realized, and the construction progress is accelerated. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is a structural schematic diagram of the utility model;
[0021] Figure 2 It is a schematic structural diagram of the outer port closing steel plate 3 of the utility model;
[0022] Figure 3 The utility model is a structural schematic diagram of the wall casting templates on both sides of the post-casting belt. DETAILED DESCRIPTION
[0023] The utility model is described in detail below with reference to the accompanying drawings:
[0024] The invention discloses an advanced sealing structure of a temperature post-casting strip on a basement outer wall and a raft slab, comprising a raft slab post-casting strip, a basement outer wall post-casting strip arranged above the raft slab post-casting strip, the basement outer wall post-casting strip and the raft slab post-casting strip being arranged correspondingly from top to bottom, and together forming a temperature post-casting strip, a raft slab inner longitudinal main reinforcement 1 being arranged in the space of the precast raft slab on both sides of the raft slab post-casting strip, an outer wall inner longitudinal main reinforcement 2 being arranged in the space of the precast basement outer wall on both sides of the basement outer wall post-casting strip, an outer port sealing steel plate 3 being arranged on the outer side ports of the basement outer wall post-casting strip and the raft slab post-casting strip, the cross section of the outer port sealing steel plate 3 being in a zigzag shape, and the outer port sealing steel plate 3 sealing the outer side ports of the basement outer wall post-casting strip and the raft slab post-casting strip as a whole; On the upper part, along the vertical direction of up and down, there are provided with folds 5 which can be laterally extended and retracted along the left and right directions. The folds 5 are equivalent to providing an expansion joint on the outer port closed steel plate 3. A left side bending plate 4 inclined inwardly is provided at the left end of the outer port closed steel plate 3, and a right side bending plate inclined inwardly is provided at the right end of the outer port closed steel plate 3. The left bending plate 4 and the right bending plate are integrally formed as a piece of steel plate with the outer port closed steel plate 3. The inner end of the left bending plate 4 is respectively welded to the outermost raft slab inner longitudinal main reinforcement 1 and the outermost outer wall inner longitudinal main reinforcement 2, and the inner end of the right bending plate is respectively welded to the outermost raft slab inner longitudinal main reinforcement 1 and the outermost outer wall inner longitudinal main reinforcement 2, to form an integrated steel bar connection system.
[0025] On both sides of the basement outer wall post-cast strip, basement outer wall formwork 7 is supported, vertical wooden slats 8 are arranged on the basement outer wall formwork 7, a pair of horizontal steel pipes 9 are arranged on the vertical wooden slats 8, and tension bolts 10 pull and fix the two basement outer wall formworks 7 together through a pair of horizontal steel pipes 9; the outer openings of the two post-cast strips are closed by the outer port steel plates 3 after the raft slab reinforcement and the basement outer wall inner reinforcement are tied, and before the wall formwork is supported.
[0026] Concrete is poured in the basement exterior wall formwork 7, and the left bent plate 4 and the right bent plate are both poured in the basement exterior wall concrete, so that the outer port closing steel plate 3 is connected to the concrete pouring walls on both sides of the post-cast strip, thereby realizing the advanced closing of the outer port of the post-cast strip.
[0027] A method for pre-sealing a temperature post-cast strip on a basement outer wall and a raft slab, comprising a raft slab post-cast strip, a basement outer wall post-cast strip arranged above the raft slab post-cast strip, a raft slab inner longitudinal main reinforcement (1) arranged in the precast raft slab space on both sides of the raft slab post-cast strip, and an outer wall inner longitudinal main reinforcement 2 arranged in the precast basement outer wall space on both sides of the basement outer wall post-cast strip, characterized by the following steps:
[0028] The first step is to manufacture an outer port closed steel plate 3 for closing the outer ports of the raft slab post-casting strip and the outer ports of the basement outer wall post-casting strip according to the width of the raft slab post-casting strip and the basement outer wall post-casting strip. On the outer port closed steel plate 3, a fold 5 which can be laterally extended and retracted in the left and right directions is arranged along the vertical direction up and down, an inwardly inclined left side bending plate 4 is arranged at the left end of the outer port closed steel plate 3, and an inwardly inclined right side bending plate is arranged at the right end of the outer port closed steel plate 3. The material of the outer port closed steel plate 3 is the same as that of the longitudinal main reinforcement 2 in the outer wall, so as to ensure that the expansion coefficient of the outer port closed steel plate 3 is the same as that of the reinforcement in the wall;
[0029] The second step is to set the outer port closing steel plate 3 on the outer port of the raft slab post-casting strip and the outer port of the basement outer wall post-casting strip, and respectively weld the inner end of the left bent plate 4 with the outermost raft slab inner longitudinal main reinforcement 1 and the outermost outer wall inner longitudinal main reinforcement 2, and respectively weld the inner end of the right bent plate with the outermost raft slab inner longitudinal main reinforcement 1 and the outermost outer wall inner longitudinal main reinforcement 2, so that the outer port closing steel plate 3, the raft slab inner longitudinal main reinforcement 1 and the outer wall inner longitudinal main reinforcement 2 are connected to form an integral steel frame system; the outer ports of the two post-casting strips are closed in advance by the outer port closing steel plate 3;
[0030] Step 3: Install two water-stop steel plates 6 between the post-cast strip of the basement exterior wall and the pre-cast wall space;
[0031] The fourth step is to support the wall casting formwork system on both sides of the basement outer wall post-casting belt, and the left bending plate 4 and the right bending plate are both arranged in the wall casting space on both sides of the basement outer wall post-casting belt;
[0032] Step 5: pour the concrete of the walls on both sides of the post-cast strip of the basement exterior wall and the raft slab on both sides of the post-cast strip of the raft slab at one time;
[0033] Step 6: After the poured concrete is finally set, remove the wall casting formwork system;
[0034] Step 7: Build the main structure above the basement exterior wall.
[0035] After the sixth step is completed, a waterproof layer is applied between the outer facades of the walls on both sides of the cast basement outer wall post-cast strip and the outer facades of the outer port closing steel plate 3, and an extruded polystyrene board waterproof protective layer is set, and finally, backfilling is carried out.
[0036] On the inner side of the steel plate 3 closing the outer ports on both sides of the wrinkles 5, tension bolt connection sleeves are provided. After the main structure on the outer wall of the basement is completed, an inner formwork is supported to close the inner port of the post-cast strip of the basement outer wall, and the outer ends of the tension bolts are connected to the sleeves to fix the inner formwork. Then, concrete is poured for the second time to fill and seal the post-cast strip of the basement outer wall and the raft slab.
Claims
1. An advanced closed structure of a temperature post-cast strip on a basement outer wall and a raft slab, comprising a raft slab post-cast strip, a basement outer wall post-cast strip arranged above the raft slab post-cast strip, a raft slab inner longitudinal main reinforcement (1) arranged in the space of the precast raft slab on both sides of the raft slab post-cast strip, and an outer wall inner longitudinal main reinforcement (2) arranged in the space of the precast basement outer wall on both sides of the basement outer wall post-cast strip, characterized in that: An outer port closing steel plate (3) is provided on the outer ports of the basement outer wall post-casting strip and the raft slab post-casting strip. The cross section of the outer port closing steel plate (3) is in a zigzag shape. The outer port closing steel plate (3) integrally closes the outer ports of the basement outer wall post-casting strip and the raft slab post-casting strip. A fold (5) that can be laterally extended and retracted in the left and right directions is provided on the outer port closing steel plate (3) along the vertical direction. An inwardly inclined left side bending plate (4) is provided at the left end of the outer port closing steel plate (3). An inwardly inclined right side bending plate is provided at the right end of the outer port closing steel plate (3). The inner side end of the left side bending plate (4) is respectively welded to the outermost raft slab inner longitudinal main reinforcement (1) and the outermost outer wall inner longitudinal main reinforcement (2). The inner side end of the right side bending plate is respectively welded to the outermost raft slab inner longitudinal main reinforcement (1) and the outermost outer wall inner longitudinal main reinforcement (2).
2. The advanced sealing structure of the temperature post-cast strip on the basement exterior wall and raft slab according to claim 1 is characterized in that: Basement exterior wall formworks (7) are supported on both sides of the post-cast strip of the basement exterior wall, vertical wooden slats (8) are arranged on the basement exterior wall formworks (7), a pair of transverse steel pipes (9) are arranged on the vertical wooden slats (8), and tension bolts (10) are used to tension and fix the two basement exterior wall formworks (7) together through the pair of transverse steel pipes (9).
3. The advanced sealing structure of the temperature post-cast strip on the basement exterior wall and raft slab according to claim 1 or 2, characterized in that: Concrete is poured in the basement outer wall formwork (7), and the left bent plate (4) and the right bent plate are both poured in the basement outer wall concrete.