Underground outer wall formwork single-side reinforcing structure with support
By using an internal tension and external bracing reinforcement system, vertical channel steel columns are welded to the main reinforcement bars of the support structure to form a stable template reinforcement structure. This solves the problems of low land utilization and high construction costs caused by excessive distance between the deep foundation pit support structure and the underground outer wall, and improves stability and economy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHINA SHANXI SIJIAN GRP
- Filing Date
- 2025-05-26
- Publication Date
- 2026-05-05
AI Technical Summary
In urban construction, existing technologies are insufficient to effectively reduce the distance between deep foundation pit support structures and underground exterior walls, resulting in low land utilization. Furthermore, traditional reinforcement methods are costly, difficult to construct, and pose a risk of leakage.
An internal tension + external bracing reinforcement system is adopted, which uses vertical channel steel columns welded to the main reinforcement of the support structure, and forms a stable template reinforcement structure through components such as upper and lower diagonal bracing, steel pipe main ribs and L-shaped screws, reducing the use of diagonal bracing, reducing construction costs and leakage risks.
This approach reduces the use of diagonal bracing in a stable single-sided formwork system, thereby lowering construction costs and leakage risks, and improving land utilization.
Smart Images
Figure CN224200267U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of building construction technology, specifically relating to a single-sided reinforcement structure for a supported underground exterior wall formwork. Background Technology
[0002] In cities where land resources are extremely valuable, reducing the distance between the deep foundation pit support structure and the building's underground exterior walls can further improve land utilization. For this type of building, the underground exterior wall formwork must employ a single-sided reinforcement system. Utility Model Content
[0003] The purpose of this utility model is to provide a single-sided reinforcement structure for underground exterior wall formwork with support, which adopts an internal tension + external bracing reinforcement system.
[0004] The present invention adopts the following technical solution:
[0005] A single-sided reinforcement structure for a supported underground exterior wall formwork includes vertical channel steel columns installed within the underground exterior wall. One end of the vertical channel steel column is embedded in the foundation guide wall. One side of the underground exterior wall is provided with formwork, and the other side is provided with main reinforcement bars of the support structure. The vertical channel steel column is welded to the main reinforcement bars of the support structure. An upper diagonal brace is provided between the top of the main reinforcement bars of the support structure and the top of the vertical channel steel column, and a lower diagonal brace is provided at the bottom. One end of the lower diagonal brace is embedded in the foundation guide wall.
[0006] Furthermore, a main steel pipe rib is provided on one side of the template, and several secondary square timber ribs are provided between the template and the main steel pipe rib.
[0007] Furthermore, the template is connected to the main steel pipe rib by several L-shaped screws.
[0008] Furthermore, an auxiliary steel pipe brace is provided between the main steel pipe rib and the foundation guide wall, with one end of the auxiliary steel pipe brace pre-embedded in the foundation guide wall.
[0009] Furthermore, the bottom of the template is connected to the foundation guide wall via horizontal channel steel legs.
[0010] Furthermore, a waterproof layer and a groove are sequentially provided on the side of the underground exterior wall near the main reinforcement of the support structure.
[0011] Furthermore, the underground outer wall is located above the foundation guide wall, and a water-stop steel plate is provided at the connection end between the underground outer wall and the foundation guide wall.
[0012] The beneficial effects of this utility model are as follows:
[0013] 1. This utility model adopts an internal tension + external support reinforcement system. The lower part of the pre-embedded channel steel bracket is embedded in the foundation guide wall, and the upper part is welded to the main support reinforcement. In the next stage, the external wall formwork internal tension support frame is used to fix the formwork by L-shaped screws. At the same time, a steel pipe diagonal brace is added in the middle of the wall to ensure the stability of the entire reinforcement system.
[0014] 2. The reinforcement system of this utility model can ensure the stability of the entire single-sided formwork system. Only one diagonal brace needs to be set in the middle of the wall height, which reduces the rental cost of steel beams, saves construction costs, and reduces construction difficulty.
[0015] 3. This utility model uses L-shaped screws, eliminating the need for through-wall screws and reducing the risk of external wall leakage. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the structure of this utility model;
[0017] Among them: 1-underground exterior wall; 2-vertical channel steel column; 3-foundation guide wall; 4-formwork; 5-main reinforcement of support structure; 6-upper diagonal brace; 7-lower diagonal brace; 8-steel pipe main joist; 9-square timber secondary joist; 10-L-shaped screw rod; 11-steel pipe auxiliary diagonal brace; 12-horizontal channel steel support leg; 13-waterproof layer; 14-groove; 15-waterstop steel plate. Detailed Implementation
[0018] The present invention will be further described with reference to the accompanying drawings.
[0019] As shown in the figure, a single-sided reinforcement structure for a supported underground exterior wall formwork includes a vertical channel steel column 2 installed in the underground exterior wall 1. One end of the vertical channel steel column 2 is embedded in the foundation guide wall 3. A formwork 4 is provided on one side of the underground exterior wall 1, and a main support reinforcement 5 is provided on the other side. The vertical channel steel column 2 is welded to the main support reinforcement 5. An upper diagonal brace 6 is provided between the top of the main support reinforcement 5 and the top of the vertical channel steel column 2, and a lower diagonal brace 7 is provided at the bottom. One end of the lower diagonal brace 7 is embedded in the foundation guide wall 3.
[0020] Furthermore, a steel pipe main rib 8 is provided on one side of the template 4, and several square timber secondary ribs 9 are provided between the template 4 and the steel pipe main rib 8.
[0021] Furthermore, the template 4 is connected to the main steel pipe rib 8 by several L-shaped screws 10.
[0022] Furthermore, a steel pipe auxiliary diagonal brace 11 is provided between the main steel pipe 8 and the foundation guide wall 3, and one end of the steel pipe auxiliary diagonal brace 11 is embedded in the foundation guide wall 3.
[0023] Furthermore, the bottom of the template 4 is connected to the foundation guide wall 3 via horizontal channel steel support legs 12.
[0024] Furthermore, a waterproof layer 13 and a groove 14 are sequentially provided on the side of the underground outer wall 1 near the main reinforcement 5 of the support structure.
[0025] Furthermore, the underground outer wall 1 is located above the foundation guide wall 3, and a water-stop steel plate 15 is provided at the connection end between the underground outer wall 1 and the foundation guide wall 3.
[0026] The construction process of this utility model is as follows:
[0027] The first step is to prefabricate the internal channel steel frame according to the thickness of the exterior wall on site, and leave screw holes in the frame at the designed intervals.
[0028] The second step is to locate and pre-embed the channel steel frame on site.
[0029] The third step is to pour the foundation and guide wall. After the foundation and guide wall have reached a certain strength, the upper wall construction will proceed.
[0030] The fourth step is to use L-shaped screws to reinforce the template with the channel steel frame.
[0031] The fifth step is to add an auxiliary diagonal brace in the middle of the wall height.
[0032] Step 6: Concrete pouring.
[0033] This utility model mainly adopts an internal tension + external bracing reinforcement system. The lower part of the pre-embedded channel steel bracket is embedded in the foundation guide wall, and the upper part is welded to the main support reinforcement. In the next stage, the external wall formwork is internally tensioned with a support frame, and the formwork is fixed by L-shaped bolts. Simultaneously, a steel pipe diagonal brace is added in the middle of the wall to ensure the stability of the entire reinforcement system. This reinforcement system can ensure the stability of the entire single-sided formwork system, requiring only one diagonal brace in the middle of the wall height, reducing the cost of renting steel frames, saving construction costs, and reducing construction difficulty. Furthermore, the use of L-shaped bolts eliminates the need for through-wall bolts, reducing the risk of external wall leakage.
[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A single-sided reinforcement structure for underground exterior wall formwork with support, characterized in that: The structure includes a vertical channel steel column (2) installed in the underground outer wall (1). One end of the vertical channel steel column (2) is embedded in the foundation guide wall (3). A template (4) is provided on one side of the underground outer wall (1), and a main support reinforcement (5) is provided on the other side. The vertical channel steel column (2) is welded to the main support reinforcement (5). An upper inclined tie (6) is provided between the top of the main support reinforcement (5) and the top of the vertical channel steel column (2), and a lower inclined tie (7) is provided at the bottom. One end of the lower inclined tie (7) is embedded in the foundation guide wall (3).
2. The single-sided reinforcement structure for a supported underground exterior wall formwork as described in claim 1, characterized in that: The template (4) has a main steel pipe rib (8) on one side, and several secondary square timber ribs (9) are provided between the template (4) and the main steel pipe rib (8).
3. A single-sided reinforcement structure for a supported underground exterior wall formwork according to claim 2, characterized in that: The template (4) is connected to the main steel pipe rib (8) by several L-shaped screws (10).
4. A single-sided reinforcement structure for a supported underground exterior wall formwork according to claim 3, characterized in that: A steel pipe auxiliary diagonal brace (11) is provided between the main steel pipe rib (8) and the foundation guide wall (3), and one end of the steel pipe auxiliary diagonal brace (11) is embedded in the foundation guide wall (3).
5. A single-sided reinforcement structure for a supported underground exterior wall formwork according to claim 1, characterized in that: The bottom of the template (4) is connected to the foundation guide wall (3) via horizontal channel steel support legs (12).
6. A single-sided reinforcement structure for a supported underground exterior wall formwork according to claim 1, characterized in that: The underground exterior wall (1) is provided with a waterproof layer (13) and a trench (14) on the side near the main reinforcement (5) of the support structure.
7. A single-sided reinforcement structure for a supported underground exterior wall formwork according to claim 1, characterized in that: The underground outer wall (1) is located above the foundation guide wall (3), and the connection end between the underground outer wall (1) and the foundation guide wall (3) is provided with a water-stop steel plate (15).