Construction structure for early closure of post-cast strip of underground exterior wall

Abstract

The utility model relates to the technical field of building construction discloses a construction structure for early closing of underground outer wall post-cast strip, two groups between the outer wall are provided with post-cast strip, and the outer wall is close to the one side of post-cast strip and is embedded with water stop steel sheet, and it includes prefabricated channel section steel plate, and the notch both ends of prefabricated channel section steel plate form the hook of inwardly bending, and prefabricated channel section steel plate covers post-cast strip and extends to the both sides of the inner surface of outer wall and sets up, and prefabricated channel section steel plate is fixedly connected with the horizontal longitudinal reinforcement of outer wall through the supporting steel bar, and one end of supporting steel bar is fixedly connected with the inner wall of prefabricated channel section steel plate, and the other end is fixedly connected with the horizontal longitudinal reinforcement of outer wall. The utility model discloses early closing construction structure construction high efficiency, effectively saves the cost, and further enhances waterproof performance and structural stability.

Description

Technical Field

[0001] This application relates to the technical field of building construction, and in particular to a construction structure for the early closure of post-cast strips in underground exterior walls. Background Technology

[0002] In the field of building construction, the construction of post-cast strips in underground exterior walls is a crucial step. The treatment of these post-cast strips directly affects the progress and quality of the entire construction project. With the continuous development of the construction industry, the demand for saving construction time and ensuring the safety and stability of the foundation pit is increasing. Therefore, the pre-sealing process for post-cast strips places higher demands on environmental protection and energy conservation. To achieve the early closure of the post-cast strip in underground exterior walls, the industry has traditionally employed techniques such as bricklaying and reinforced concrete wall construction. Temporary retaining walls are built brick by brick, and backfilling is done once the wall reaches the required strength. This method is not only costly in terms of manpower, resources, and time, but also results in idle work during construction. Building the wall from the basement floor to the top floor level in one go poses safety hazards. Another method is to form the retaining wall structure by pouring reinforced concrete. This method can address the safety issues associated with high structural heights to some extent. However, it significantly increases the labor costs for formwork and the cost of reinforced concrete materials, failing to adequately meet the industry's higher requirements for environmental protection, energy conservation, and cost control.

[0003] Therefore, it is necessary to develop a pre-sealing construction structure to solve the safety and cost problems of existing pre-sealing structures, and to meet the higher requirements of environmental protection and energy conservation. This has become an important issue that urgently needs to be addressed. Utility Model Content

[0004] To address the safety and cost issues of existing pre-sealing structures and to meet higher requirements for environmental protection and energy conservation, this application provides a construction structure for pre-sealing of post-cast strips in underground exterior walls.

[0005] A construction structure for pre-sealing the post-cast strip of an underground exterior wall is disclosed. A post-cast strip is provided between two sets of exterior walls. A water-stop steel plate, including a precast channel-shaped steel plate, is pre-embedded on the side of the exterior wall near the post-cast strip. The precast channel-shaped steel plate has inwardly bent hooks at both ends of its groove. The precast channel-shaped steel plate covers the post-cast strip and extends to both sides of the inner surface of the exterior wall. The precast channel-shaped steel plate is fixedly connected to the horizontal longitudinal reinforcement of the exterior wall via supporting reinforcing bars. One end of the supporting reinforcing bar is fixedly connected to the inner wall of the precast channel-shaped steel plate, and the other end is fixedly connected to the horizontal longitudinal reinforcement of the exterior wall.

[0006] The above technical solution utilizes precast channel steel plates to cover the post-pouring strip and extend it to both sides, while fixing it with supporting steel bars and the horizontal longitudinal steel bars of the outer wall. This effectively replaces traditional masonry walls or reinforced concrete walls, significantly reducing installation difficulty and economic costs, and achieving efficient construction. Furthermore, the precast channel steel plates have excellent water-blocking performance, which can improve the common quality problem of leakage in the post-pouring strip of underground outer walls, reduce quality problems such as grout leakage and deformation that are prone to occur in traditional temporary supports, and ensure the construction quality and safety of the basement outer wall.

[0007] Furthermore, the bending angle of the hook is 45 degrees, and the groove depth of the prefabricated channel steel plate is 50 mm.

[0008] Through the above technical solution, the bending angle of the hook of the precast channel steel plate can form a suitable angle and be controlled at a suitable channel depth, effectively forming a channel shape that matches the post-cast strip of the exterior wall, thereby replacing masonry wall or reinforced concrete wall, and achieving the effects of convenient installation and efficient construction.

[0009] Furthermore, the prefabricated channel steel plate extends at least 300 mm to each side of the inner surface of the outer wall.

[0010] The above technical solutions enable precast channel steel plates to better cover the post-cast strip and surrounding area, enhance the sealing effect of the post-cast strip, and improve waterproof performance and structural stability.

[0011] Furthermore, the first connection between the supporting steel bar and the horizontal longitudinal steel bar of the outer wall is connected by spot welding, and the gap at the first connection is filled with structural adhesive. The second connection between the supporting steel bar and the precast channel steel plate is connected by spot welding, and the gap at the second connection is filled with structural adhesive.

[0012] Through the above technical solution, the supporting steel bars, the horizontal and longitudinal steel bars of the outer wall, and the precast channel steel plates are all connected by spot welding, and the gaps at the connection are filled with structural adhesive, which enhances the stability and sealing of the connection and improves the stability and waterproof performance of the entire pre-sealed structure.

[0013] Furthermore, the gaps between the two ends of the precast channel steel plate and the outer wall are filled with crack-resistant and waterproof mortar, forming a waterproof R-angle.

[0014] By using the above technical solution, the gaps between the two ends of the precast channel steel plate and the outer wall are filled with crack-resistant and waterproof mortar to form a waterproof R-angle, which can enhance the waterproof and crack-resistant performance of the area, reduce leakage and cracks at the gaps, and improve the overall waterproof effect and stability of the pre-sealed structure.

[0015] Furthermore, the outer side of the precast channel steel plate is covered with a waterproof layer, which includes a waterproof felt and a waterproof roll material arranged sequentially from the inside to the outside.

[0016] By using the above technical solution, covering the outside of the precast channel steel plate with a waterproof layer composed of waterproof felt and waterproof membrane can further enhance the waterproof performance of the pre-sealed structure of the underground external wall post-cast strip, effectively block water penetration, reduce leakage risks, provide more reliable waterproof protection for the underground external wall post-cast strip area, and ensure the stability and durability of the structure.

[0017] Furthermore, the waterproof layer covers the precast channel steel plate and extends 500 mm to each side of the exterior wall surface on both sides of the precast channel steel plate.

[0018] The above technical solution covers the precast channel steel plate and extends 500 mm to each side of the outer wall surface, which can expand the waterproof range, better prevent water from penetrating into the post-pouring strip area, enhance the waterproof performance of the pre-sealed structure, effectively reduce the probability of leakage problems in the post-pouring strip of the underground outer wall, and ensure the waterproof effect of the underground outer wall.

[0019] Furthermore, a waterproof membrane protective layer is provided on the outer side of the waterproof membrane.

[0020] By using the above technical solution, a protective layer for the waterproof membrane is set on the outside of the waterproof membrane, which can prevent the waterproof membrane from being damaged by external forces during subsequent construction or use, and further enhance the waterproof performance and durability of the pre-sealed structure of the underground exterior wall post-pouring strip.

[0021] In summary, this application has at least the following beneficial technical effects: By using precast channel steel plates as closing components, this application achieves rapid installation of steel plates through hook design, internal support steel reinforcement fixing, and reliable connection with the external wall, saving labor and material costs, thereby achieving early closure of the post-pouring strip, effectively avoiding the complex procedures and curing period of traditional masonry or concrete walls, and significantly shortening the construction period; moreover, the precast channel steel plates have a stable structure, which greatly improves the overall waterproof reliability of the post-pouring strip area. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of a construction structure for pre-sealing of post-pouring strips in underground exterior walls, provided by an embodiment of this utility model.

[0023] Explanation of reference numerals in the attached figures: 1. Exterior wall; 11. Horizontal and longitudinal reinforcement; 2. Post-cast strip; 3. Waterstop steel plate; 4. Precast channel steel plate; 41. Hook; 42. Waterproof R-angle; 5. Supporting reinforcement; 6. Waterproof layer; 7. Waterproof membrane protective layer. Detailed Implementation

[0024] The following combination Figure 1 The technical solutions in the embodiments of this utility model will be described in detail.

[0025] See Figure 1 This utility model embodiment provides a construction structure for the early closure of the post-pouring strip of an underground exterior wall. A post-pouring strip 2 is provided between two sets of exterior walls 1, and a water-stop steel plate 3 is pre-embedded on the side of the exterior wall 1 near the post-pouring strip 2. The construction structure for early closure includes a precast channel steel plate 4. The two ends of the channel of the precast channel steel plate 4 form inwardly bent hooks 41. The precast channel steel plate 4 covers the post-pouring strip 2 and extends to both sides of the inner surface of the exterior wall 1. The precast channel steel plate 4 is fixedly connected to the horizontal longitudinal steel bars 11 of the exterior wall 1 by supporting steel bars 5. One end of the supporting steel bars 5 is fixedly connected to the inner wall of the precast channel steel plate 4, and the other end is fixedly connected to the horizontal longitudinal steel bars 11 of the exterior wall 1.

[0026] Specifically, the bending angle of the hooks 41 at both ends of the precast channel steel plate 4 is 45 degrees, the channel depth is 50 mm, and the distance of the precast channel steel plate extending to the inner surface of the outer wall on each side is not less than 300 mm. It should be noted that the thickness of the precast channel steel plate 4 is determined according to the actual site conditions, and the specific dimensions are determined according to the on-site post-pouring strip.

[0027] To further enhance the stability of the entire pre-closed construction structure, the first connection between the supporting steel bar 5 and the horizontal longitudinal steel bar 11 of the outer wall 1 is made by spot welding, and the gap at the first connection is filled with structural adhesive. The second connection between the supporting steel bar 5 and the precast channel steel plate 4 is made by spot welding, and the gap at the second connection is filled with structural adhesive.

[0028] To further enhance the waterproofness of the entire pre-sealed construction structure, the gaps between the two ends of the precast channel steel plate 4 hooks 41 and the outer wall 1 are filled with crack-resistant waterproof mortar and form a waterproof R-angle 42.

[0029] Furthermore, the outer side of the precast channel steel plate 4 is covered with a waterproof layer 6, which includes a waterproof felt and a waterproof membrane arranged sequentially from the inside to the outside. A waterproof membrane protective layer 7 is also provided on the outside of the waterproof membrane. The waterproof felt, waterproof membrane and waterproof membrane protective layer 7 cover the precast channel steel plate 4 and extend 500 mm to the surface of the outer wall 1 on both sides of the precast channel steel plate 4.

[0030] The implementation principle of a construction structure for pre-sealing of post-cast strips in underground exterior walls according to an embodiment of this application is as follows: First, a precast channel steel plate 4 is placed over the post-cast strip 2, extending at least 300 mm into the inner surface of the exterior walls 1 on both sides; then, the precast channel steel plate 4 is spot-welded to the horizontal longitudinal steel bars 11 of the exterior wall 1 using supporting steel bars 5, and structural adhesive is filled into the weld gaps to enhance the connection sealing; then, crack-resistant waterproof mortar is filled into the gaps between the hooks 41 at both ends of the precast channel steel plate 4 and the exterior wall 1, and is troweled to form a waterproof R-angle 42; on this basis, waterproof felt and waterproof membrane are sequentially laid on the surface of the precast channel steel plate 4 and the exterior wall surface extending 500 mm on both sides to form a waterproof layer 6, and then a waterproof membrane protective layer 7 is set on the outside of the waterproof membrane to complete the overall waterproof structure.

[0031] The construction structure of this application for the early closure of the post-cast strip of the underground exterior wall can realize the early closure of the post-cast strip of the underground exterior wall, providing conditions for subsequent backfilling of the trench and internal processes. When the time is right for the post-cast strip concrete pouring, the steel plate can be directly used as a permanent formwork for single-sided formwork pouring.

[0032] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A construction structure for pre-sealing of post-cast strips in underground exterior walls, wherein a post-cast strip is provided between two sets of exterior walls, and a water-stop steel plate is pre-embedded on the side of the exterior wall near the post-cast strip, characterized in that: The precast channel steel plate includes a precast channel steel plate with inwardly bent hooks at both ends of the channel opening. The precast channel steel plate covers the post-cast strip and extends to both sides of the inner surface of the outer wall. The precast channel steel plate is fixedly connected to the horizontal longitudinal steel bars of the outer wall by supporting steel bars. One end of the supporting steel bar is fixedly connected to the inner wall of the precast channel steel plate, and the other end is fixedly connected to the horizontal longitudinal steel bars of the outer wall.

2. The construction structure for pre-sealing of post-cast strips in underground exterior walls according to claim 1, characterized in that: The bending angle of the hook is 45 degrees, and the groove depth of the prefabricated channel steel plate is 50 mm.

3. A construction structure for pre-sealing of post-cast strips in underground exterior walls according to claim 1, characterized in that: The precast channel steel plate extends at least 300 mm to each side of the inner surface of the outer wall.

4. A construction structure for pre-sealing of post-cast strips in underground exterior walls according to claim 1, characterized in that: The first connection between the supporting steel bar and the horizontal longitudinal steel bar of the outer wall is made by spot welding, and the gap at the first connection is filled with structural adhesive. The second connection between the supporting steel bar and the precast channel steel plate is made by spot welding, and the gap at the second connection is filled with structural adhesive.

5. A construction structure for pre-sealing of post-cast strips in underground exterior walls according to claim 1, characterized in that: The gaps between the two ends of the precast channel steel plate and the outer wall are filled with crack-resistant and waterproof mortar, forming a waterproof R-angle.

6. A construction structure for pre-sealing of post-cast strips in underground exterior walls according to claim 1, characterized in that: The precast channel steel plate is covered with a waterproof layer on the outside, which includes a waterproof felt and a waterproof roll material arranged sequentially from the inside to the outside.

7. A construction structure for pre-sealing of post-cast strips in underground exterior walls according to claim 6, characterized in that: The waterproof layer is applied over the precast channel steel plate and extends 500 mm to each side of the exterior wall surface on both sides of the precast channel steel plate.

8. A construction structure for pre-sealing of post-cast strips in underground exterior walls according to claim 7, characterized in that: The waterproof membrane is also provided with a waterproof membrane protective layer on the outside.

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