Structure of basement exterior wall post-cast strip and construction method

Abstract

The invention discloses a basement outer wall post-cast strip structure and a construction method, and relates to the technical field of constructional engineering.The basement outer wall post-cast strip structure comprises a post-cast strip body arranged on a building outer wall and two pre-embedded steel plates laid on the side wall of the post-cast strip body, and the two pre-embedded steel plates are arranged on the two sides of the post-cast strip body respectively; a rubber waterstop is arranged at the joint position of the two embedded steel plates, and the rubber waterstop is fixedly connected with the embedded steel plates on the two sides respectively. On the premise of meeting the basic functions of the post-cast strip main body, the anti-seepage performance of the post-cast strip main body part is enhanced, the water seepage risk is effectively reduced, the service life of a building is prolonged, and the safety of the building is improved.

Description

Technical Field

[0001] The present application relates to the technical field of construction engineering, and in particular to a structure and construction method of a post-cast strip of a basement exterior wall. Background Art

[0002] Post-cast strips are a commonly used technical measure in construction, mainly used to prevent cracks in cast-in-place reinforced concrete structures caused by temperature changes, shrinkage and expansion. In modern buildings, especially high-rise buildings, post-cast strips in basements are widely used, which can effectively improve the integrity and safety of buildings. In recent years, with the rapid development of the construction industry and technological progress, the design and construction methods of post-cast strips have been continuously optimized and improved, and have gradually become one of the important links in ensuring the quality of buildings.

[0003] In the existing post-casting strip design and construction methods, a common practice is to reserve a certain gap during the construction of the building's exterior wall and use a wooden formwork as the forming formwork on the outside of the post-casting strip. After the construction of the building's exterior wall is completed and reaches a certain strength, the wooden formwork is removed, the debris inside the post-casting strip is cleaned, and finally the secondary pouring of the post-casting strip concrete is carried out.

[0004] However, in the actual construction process, due to the shrinkage force of the wall itself and the influence of external environmental factors (such as temperature difference, humidity, etc.), harmful cracks are still prone to occur in the post-cast joints, leading to problems such as water seepage. Especially in the construction of the post-cast joints on the exterior walls of the basement, these problems are more prominent, seriously affecting the service life and safety of the building. Summary of the invention

[0005] In view of the problems existing in the prior art, the present application provides a structure and construction method for a post-cast strip of a basement exterior wall.

[0006] In the first aspect, the present application provides a structure of a post-cast strip of a basement exterior wall, which adopts the following technical solution: A structure of a post-cast strip on the exterior wall of a basement, comprising a post-cast strip body arranged on the exterior wall of a building, and embedded steel plates laid on the side walls of the post-cast strip body, wherein two embedded steel plates are provided and are arranged on both sides of the post-cast strip body, and rubber waterstops are provided at the joint positions of the two embedded steel plates, and the rubber waterstops are fixedly connected to the embedded steel plates on both sides respectively.

[0007] Optionally, a plurality of prestressed anchor rods are fixedly provided on the back side of the embedded steel plate, and the prestressed anchor rods are embedded in the exterior wall of the building.

[0008] Optionally, one end of the two embedded steel plates close to each other is provided with an embedding groove for placing a rubber waterstop, and the rubber waterstop is bonded to the embedding groove of the embedded steel plate by a waterproof sealant.

[0009] Optionally, a gasket is provided in the embedding groove, and the gasket is made of a water-swellable material.

[0010] Optionally, the gasket is coated with a soft rubber layer, and the soft rubber layer is provided with a plurality of water holes.

[0011] Optionally, pedestals are provided on both sides of the opening position of the post-cast strip body, embedded steel bars are provided in the pedestals, one end of the embedded steel bars is embedded in the outer wall of the building, and a reinforcing rib mesh is provided at the opening position of the post-cast strip body, and both sides of the reinforcing rib mesh are respectively located in the pedestals on both sides of the post-cast strip body, and are respectively fixedly connected to the embedded steel bars in the pedestals on both sides.

[0012] Optionally, the reinforcing rib mesh is formed by binding a plurality of reinforcing steel bars, a connecting plate is fixed to the embedded steel plate by bolts, and a plurality of through holes are formed on the connecting plate for the reinforcing steel bars to pass through.

[0013] In a second aspect, the present application provides a construction method for a structure of a post-cast strip of a basement exterior wall, using the following technical solution: A construction method for a basement exterior wall post-cast strip structure comprises the following steps: S1. During the construction of the building exterior wall, determine the position of the post-cast strip body and the cap according to the design drawings; S2. Install the embedded steel plates on both side walls of the preset post-casting strip body, ensure that the embedded steel plates are accurately positioned and firmly installed, and reserve a gap of 20-30mm between the two embedded steel plates; S3. Install a rubber water stop in the gap between the two embedded steel plates, and fix the rubber water stop to the embedded steel plates on both sides through waterproof sealant; S4. Carry out the pouring of the building exterior wall, and during the construction of the building exterior wall, set up the embedded steel bars in the cap; S5. After the exterior wall construction is completed and reaches a certain strength, check the position and status of the embedded steel plate to ensure that there is no looseness; S6. Lay a reinforcing rib mesh at the opening position of the post-cast strip body, and tie and fix the two sides of the reinforcing rib mesh to the embedded steel bars in the caps on both sides of the post-cast strip body; S7. Pour the post-casting strip concrete in the post-casting strip body until it completely fills the entire post-casting strip body space, and finally cure the post-casting strip concrete.

[0014] Optionally, before pouring the post-cast strip concrete, a buffer plate is arranged at the bottom of the post-cast strip body, the buffer plate is made of polyethylene foam material, and the buffer plate is in contact with the ground.

[0015] Optionally, the post-cast zone concrete is poured layer by layer from bottom to top.

[0016] In summary, the present application includes at least one of the following beneficial technical effects: 1. This application arranges embedded steel plates on both sides of the main body of the post-cast strip, and the joints of the two embedded steel plates are sealed and connected by a rubber waterstop. This enhances the anti-seepage performance of the main body of the post-cast strip while meeting the basic functions of the main body of the post-cast strip, effectively reduces the risk of water seepage, and improves the service life and safety of the building.

[0017] 2. The rubber water stop is bonded to the embedded groove of the embedded steel plate with waterproof sealant, which can significantly improve the waterproof performance of the post-cast strip body and effectively prevent water penetration. At the same time, the design of the embedded groove makes the rubber water stop more stable, avoiding displacement or falling off during the construction process, thereby ensuring the overall structural stability and reliability of the post-cast strip body.

[0018] 3. In the present application, a gasket is arranged in the groove of the embedded steel plate, and the gasket is made of a water-absorbing and swelling material. When the waterproof sealant at the connection between the rubber waterstop and the embedded steel plate cracks due to the shrinkage force of the exterior wall and the influence of external factors, the gasket can expand rapidly when it comes into contact with water, plugging the tiny gaps that may appear, thereby further improving the anti-seepage performance of the main body of the post-cast strip.

[0019] 4. This application significantly improves the connection strength between the main body of the post-cast strip and the building exterior wall by setting caps on both sides of the opening position of the main body of the post-cast strip, setting embedded steel bars in the caps, and arranging the reinforcing rib net to fix the reinforcing rib net with the embedded steel bars, thereby avoiding displacement or deformation caused by external factors. At the same time, the arrangement of the reinforcing rib net further strengthens the tensile and shear resistance of the main body of the post-cast strip, effectively preventing the generation of cracks during subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a cross-sectional view of the overall structure of an embodiment of the present application; Figure 2 is a partial structural cross-sectional view of an embodiment of the present application; Figure 3 yes Figure 1 A magnified view of part A; Figure 4 It is a schematic diagram of the entire structure of an embodiment of the present application.

[0021] Explanation of the accompanying reference numerals: 1. Post-cast strip body; 11. Capping platform; 12. Embedded steel bars; 2. Embedded steel plates; 21. Prestressed anchor rods; 22. Grooves; 23. Gaskets; 231. Soft rubber layer; 2311. Water holes; 24. Connecting plates; 241. Through holes; 242. Mounting holes; 25. Bolts; 3. Rubber waterstop; 4. Reinforcing rib mesh; 41. Reinforcing steel bars; 5. Post-cast strip concrete; 6. Buffer plates. DETAILED DESCRIPTION

[0022] The following will be combined with the attached Figure 1 -Attached Figure 4 , the technical solutions in the embodiments of the present invention are clearly and completely described. The described embodiments are only possible technical implementations of the present invention, not all possible implementations. Those skilled in the art can completely combine the embodiments of the present invention to obtain other embodiments without creative work, and these embodiments are also within the scope of protection of the present invention.

[0023] The inventor of the present application has found that in the traditional post-casting strip design, due to the shrinkage force of the wall itself and the influence of external environmental factors (such as temperature difference, humidity, etc.), harmful cracks are easily generated in the post-casting strip, resulting in water seepage and other problems. Especially in the construction of the post-casting strip of the basement exterior wall, these problems are more prominent, seriously affecting the service life and safety of the building. To this end, the present application adopts and discloses a structure and construction method of the post-casting strip of the basement exterior wall, mainly adopting the following scheme: The present application embodiment discloses a structure of a post-cast strip of a basement exterior wall. Figure 1 , 2 , including a post-cast strip body 1 arranged on the exterior wall of the building, and an embedded steel plate 2 laid on the side wall of the post-cast strip body 1, two embedded steel plates 2 are provided and are respectively arranged on both sides of the post-cast strip body 1, and a rubber waterstop 3 is provided at the joint position of the two embedded steel plates 2, and the rubber waterstop 3 is respectively fixedly connected to the embedded steel plates 2 on both sides, thereby achieving the effect of enhancing the anti-seepage performance and structural strength of the post-cast strip body 1.

[0024] Reference Figure 1 The steel plate body can be made of high-strength alloy steel, with a thickness of generally 10-20mm, and the length and width can be adjusted according to actual needs. A prestressed anchor rod 21 is fixedly arranged on the back of the steel plate body. The prestressed anchor rod 21 can be made of high-strength threaded steel bar, with a diameter of generally 16-25mm, and the length can be adjusted according to the thickness of the building's exterior wall. The prestressed anchor rod 21 is embedded in the building's exterior wall and fixed by an anchoring agent to ensure the stability of the embedded steel plate 2.

[0025] Reference Figure 2 The ends of the two embedded steel plates 2 that are close to each other are each provided with an embedding groove 22 for placing the rubber waterstop 3, and the rubber waterstop 3 is bonded to the embedding groove 22 of the embedded steel plate 2 by waterproof sealant; the design of the embedding groove 22 makes the rubber waterstop 3 more stable, avoiding displacement or falling off during the construction process, thereby ensuring the overall structural stability and reliability of the post-cast strip body 1 and ensuring the sealing effect.

[0026] Reference Figure 2, a gasket 23 is also arranged in the embedded groove 22. The gasket 23 is made of water-absorbing and swelling material and can expand when it encounters water. When the waterproof sealant at the connection between the rubber waterstop 3 and the embedded steel plate 2 cracks due to the shrinkage force of the external wall and the influence of external factors, the gasket 23 can expand rapidly when it encounters water, plugging the possible tiny gaps, and further improving the anti-seepage performance of the post-casting strip body 1. Furthermore, the gasket 23 is also coated with a soft rubber layer 231, and a number of water holes 2311 are arranged on the soft rubber layer 231. The soft rubber layer 231 can be made of soft silica gel, which has good flexibility and waterproof performance, and the thickness is generally 2-5mm. The diameter of the water holes 2311 is generally 1-3mm, and the spacing is 10-20mm, ensuring that water can smoothly enter the gasket 23. As the gasket 23 expands, the soft rubber layer 231 expands and extends, thereby improving the sealing effect of the gap.

[0027] Reference Figure 1 , 3 A cap 11 is provided on both sides of the opening position of the post-cast strip body 1. The size of the cap 11 is adjusted according to the size of the post-cast strip body 1. The height is generally 300-500mm, and the width is 50-100mm wider than the post-cast strip body 1. Embedded steel bars 12 are provided in the cap 11. The embedded steel bars 12 are HRB400 steel bars, and the diameter is generally 16-25mm. The length is adjusted according to the size of the cap 11. One end of the embedded steel bar 12 is embedded in the outer wall of the building, and the other end is located in the cap 11.

[0028] Reference Figure 3 , 4 , a reinforcing rib net 4 is arranged at the opening position of the post-cast strip body 1, and the two sides of the reinforcing rib net 4 are respectively located in the caps 11 on both sides of the post-cast strip body 1, and are respectively fixedly connected with the embedded steel bars 12 in the caps 11 on both sides. Specifically, the reinforcing rib net 4 is formed by a plurality of reinforcing steel bars 41 tied in a "well" shape. After the construction of the building's exterior wall is completed and reaches a certain strength, the reinforcing rib net 4 is laid at the opening position of the post-cast strip body 1, and the two sides of the reinforcing rib net 4 are respectively located in the caps 11 on both sides of the post-cast strip body 1, and are respectively tied and fixed with the embedded steel bars 12 in the caps 11 on both sides. Afterwards, the post-cast strip concrete 5 is poured in the post-cast strip body 1 until the entire post-cast strip body 1 space is completely filled. When the post-cast strip concrete 5 is poured, the reinforcing rib net 4 and the embedded steel bars 12 are all embedded in the post-cast strip concrete 5, thereby significantly improving the connection strength between the post-cast strip body 1 and the building's exterior wall, and avoiding displacement or deformation caused by external factors. At the same time, the arrangement of the reinforcing rib mesh 4 further strengthens the tensile and shearing resistance of the post-cast strip body 1, effectively preventing the generation of cracks during subsequent use.

[0029] Reference Figure 3, a connecting plate 24 is fixed to the embedded steel plate 2 by bolts 25, and a plurality of through holes 241 are provided on the connecting plate 24 for the reinforcing steel bars 41 to pass through. Specifically, a plurality of bolts 25 are welded on the surface of the embedded steel plate 2, and each bolt 25 is equipped with a nut. A mounting hole 242 is provided on the connecting plate 24 for the bolts 25 to pass through. The connecting plate 24 can be made of Q235 steel plate, and the thickness is generally 10-15mm, and the width is adjusted according to actual needs. The diameter of the through hole 241 is slightly larger than the diameter of the reinforcing steel bar 41, ensuring that the reinforcing steel bar 41 can pass through and be fixed smoothly; the reinforcing rib mesh 4 is connected to the embedded steel plate 2 through the connecting plate 24, so as to further enhance the structural strength of the post-casting strip body 1 and improve the integrity of the structure.

[0030] The implementation principle of the structure of the post-cast strip of the basement exterior wall in an embodiment of the present application is as follows: when the building exterior wall is constructed, embedded steel plates 2 are arranged on both sides of the post-cast strip body 1, and the joints of the two embedded steel plates 2 are sealed and connected by a rubber waterstop 3. Thus, while the basic functions of the post-cast strip body 1 are met, the anti-seepage performance of the post-cast strip body 1 is enhanced, the risk of water seepage is effectively reduced, and the service life and safety of the building are improved.

[0031] After the construction of the building's exterior wall is completed and reaches a certain strength, a reinforcing rib net 4 is laid at the opening of the post-cast strip body 1. The two sides of the reinforcing rib net 4 are respectively located in the pedestals 11 on both sides of the post-cast strip body 1, and are respectively tied and fixed to the embedded steel bars 12 in the pedestals 11 on both sides. Afterwards, the post-cast strip concrete 5 is poured in the post-cast strip body 1 until it completely fills the entire post-cast strip body 1 space. When the post-cast strip concrete 5 is poured, the reinforcing rib net 4 and the embedded steel bars 12 are all embedded in the post-cast strip concrete 5, thereby significantly improving the connection strength between the post-cast strip body 1 and the building's exterior wall, and avoiding displacement or deformation caused by external factors. At the same time, the arrangement of the reinforcing rib net 4 further strengthens the tensile and shear resistance of the post-cast strip body 1, effectively preventing the generation of cracks during subsequent use.

[0032] The present application also discloses a method for constructing a structure of a post-cast strip of a basement exterior wall, comprising the following steps: S1. During the construction of the building exterior wall, the positions of the post-cast strip body 1 and the cap 11 are determined according to the design drawings; S2. Install the embedded steel plates 2 on both side walls of the preset post-casting strip body 1, ensure that the embedded steel plates 2 are accurately positioned and firmly installed, and reserve a gap of 20-30 mm between the two embedded steel plates 2; S3, installing a rubber water stop 3 in the gap between the two embedded steel plates 2, and the rubber water stop 3 is fixed to the embedded steel plates 2 on both sides respectively by waterproof sealant; S4, pouring the building's exterior wall, and setting the embedded steel bars 12 in the cap 11 during the construction of the building's exterior wall; S5. After the construction of the building exterior wall is completed and reaches a certain strength, check the position and state of the embedded steel plate 2 to ensure that there is no looseness; S6, laying a reinforcing rib mesh 4 at the opening position of the post-cast strip body 1, and the two sides of the reinforcing rib mesh 4 are respectively tied and fixed to the embedded steel bars 12 in the caps 11 on both sides of the post-cast strip body 1; S7, pouring the post-cast strip concrete 5 in the post-cast strip body 1 until the entire post-cast strip body 1 is completely filled, and finally curing the post-cast strip concrete 5.

[0033] Reference Figure 4 A buffer plate 6 is arranged at the bottom of the post-cast strip body 1. The buffer plate 6 is made of polyethylene foam material and is in contact with the ground. The thickness of the buffer plate 6 is generally 10-20 mm, and the shape is adapted to the shape and size of the post-cast strip body 1. Before pouring the post-cast strip concrete 5, a buffer plate 6 is arranged at the bottom of the post-cast strip body 1. The setting of the buffer plate 6 can not only reduce the pressure of the ground load on the bottom, but also absorb excess vibration energy, thereby improving the structural strength of the post-cast strip body 1 during subsequent use.

[0034] Reference Figure 4 When pouring the post-cast zone concrete 5, it is poured layer by layer from bottom to top. The height of each layer is generally 300-500mm, and the pouring interval is 1-2 hours to ensure that each layer of concrete can be fully solidified. During the pouring process, a vibrating rod can be used to vibrate to ensure the density of the concrete and prevent the generation of bubbles and voids. After pouring, the post-cast zone concrete 5 should be cured. The curing time is generally 7-14 days to ensure that the strength of the concrete meets the design requirements.

[0035] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A structure of a post-cast strip of a basement exterior wall, characterized in that: The invention comprises a post-cast strip body (1) arranged on the exterior wall of a building, and an embedded steel plate (2) laid on the side wall of the post-cast strip body (1), wherein the embedded steel plate (2) is provided in two pieces and is arranged on both sides of the post-cast strip body (1), and a rubber water stop (3) is arranged at the joint position of the two embedded steel plates (2), and the rubber water stop (3) is fixedly connected to the embedded steel plates (2) on both sides respectively.

2. The structure of the post-cast strip of the basement exterior wall according to claim 1 is characterized in that: A plurality of prestressed anchor rods (21) are fixedly arranged on the back of the embedded steel plate (2), and the prestressed anchor rods (21) are embedded in the exterior wall of the building.

3. The structure of the post-cast strip of the basement exterior wall according to claim 1 is characterized by: The ends of the two embedded steel plates (2) close to each other are each provided with an embedding groove (22) for placing a rubber water stop (3), and the rubber water stop (3) is bonded in the embedding groove (22) of the embedded steel plate (2) by means of a waterproof sealant.

4. The structure of the post-cast strip of the basement exterior wall according to claim 3 is characterized by: A gasket (23) is arranged in the embedding groove (22), and the gasket (23) is made of a water-absorbing and swelling material.

5. The structure of the post-cast strip of the basement exterior wall according to claim 4 is characterized in that: The gasket (23) is coated with a soft rubber layer (231), and the soft rubber layer (231) is provided with a plurality of water holes (2311).

6. The structure of the post-cast strip of the basement exterior wall according to claim 1 is characterized by: A cap (11) is provided on both sides of the opening position of the post-cast strip body (1), embedded steel bars (12) are provided in the cap (11), one end of the embedded steel bars (12) is embedded in the building outer wall, and a reinforcing rib net (4) is provided at the opening position of the post-cast strip body (1), the two sides of the reinforcing rib net (4) are respectively located in the caps (11) on both sides of the post-cast strip body (1), and are respectively fixedly connected to the embedded steel bars (12) in the caps (11) on both sides.

7. The structure of the post-cast strip of the basement exterior wall according to claim 6 is characterized by: The reinforcing rib net (4) is formed by binding a plurality of reinforcing steel bars (41), a connecting plate (24) is fixed to the embedded steel plate (2) by bolts (25), and a plurality of through holes (241) are provided on the connecting plate (24) for the reinforcing steel bars (41) to pass through.

8. A construction method based on the structure of the post-cast strip of the basement exterior wall according to claim 6, characterized in that: The following steps are involved: S1. During the construction of the building exterior wall, the positions of the post-cast strip body (1) and the cap (11) are determined according to the design drawings; S2. Install the embedded steel plates (2) at both side wall positions of the preset post-casting strip body (1), ensure that the embedded steel plates (2) are accurately positioned and firmly installed, and reserve a gap of 20-30 mm between the two embedded steel plates (2); S3, installing a rubber water stop strip (3) in the gap between the two pre-buried steel plates (2), and the rubber water stop strip (3) is fixed to the pre-buried steel plates (2) on both sides respectively by means of waterproof sealant; S4, performing pouring of the building exterior wall, and during the construction of the building exterior wall, arranging the embedded steel bars (12) in the cap (11); S5. After the construction of the building's exterior wall is completed and reaches a certain strength, check the position and state of the embedded steel plate (2) to ensure that there is no looseness; S6, laying a reinforcing rib mesh (4) at the opening position of the post-cast strip body (1), and tying and fixing both sides of the reinforcing rib mesh (4) to the pre-buried steel bars (12) in the caps (11) at both sides of the post-cast strip body (1); S7, pouring the post-casting strip concrete (5) in the post-casting strip body (1) until the space of the post-casting strip body (1) is completely filled, and finally curing the post-casting strip concrete (5).

9. The construction method of the structure of the post-cast strip of the basement exterior wall according to claim 8 is characterized by: Before pouring the post-cast strip concrete (5), a buffer plate (6) is arranged at the bottom of the post-cast strip body (1); the buffer plate (6) is made of polyethylene foam material, and the buffer plate (6) is in contact with the ground.

10. The construction method of the structure of the post-cast strip of the basement exterior wall according to claim 8, characterized in that: When pouring the post-cast zone concrete (5), it is poured layer by layer from bottom to top.

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