Foundation pit shaping protection device and construction method

Abstract

The application relates to the field of foundation pit earthwork excavation, and discloses a foundation pit shaping protection device and a construction method. By arranging a support column assembly, a protection net assembly is arranged on the ground around the foundation pit before the foundation pit edge is hardened, thereby playing a protection role. After the foundation pit edge is hardened, a water retaining wall is arranged at the bottom of the protection net assembly; the water retaining wall can effectively support the protection net assembly while playing a water retaining function, and the protection net assembly and the water retaining wall are arranged in an integrated mode. Compared with the prior art, the temporary protection net is arranged before the foundation pit edge is hardened; the water retaining wall and the formal protection net on the water retaining wall are constructed after the foundation pit edge is hardened, and the temporary protection net is removed. According to the above measures, the arrangement of the temporary protection net is omitted, the formal protection net structure can be arranged in advance before the foundation pit edge is hardened, the work efficiency is effectively improved, and the personnel cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of foundation pit excavation, specifically to standardized foundation pit protection devices and construction methods. Background Technology

[0002] In the current foundation pit stage, safe edge protection is particularly important. Given the increasingly sophisticated construction environment, standardized edge protection is generally required for foundation pits. However, in the early stages of earthwork excavation, the lack of construction of the foundation and retaining wall under the standardized protection leads to untimely installation of the standardized protection, creating certain safety hazards. The current conventional practice is to first erect temporary protection using steel pipes, then construct the retaining wall and the foundation for the standardized protection. After the foundation has gained sufficient strength, the standardized protection is then constructed, and finally the temporary steel pipe protection is dismantled. This method requires erecting the edge protection using steel pipes, followed by dismantling it, and simultaneously constructing the foundation for the standardized protection, resulting in a waste of manual labor and low overall work efficiency. Summary of the Invention

[0003] To address the aforementioned shortcomings of existing technologies, a standardized protective device and construction method for foundation pits are provided. This method eliminates the need for temporary protective netting and allows for the pre-installation of the formal protective netting structure before the foundation pit edge hardens, effectively improving work efficiency and reducing personnel costs.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows:

[0005] A standardized protection device for foundation pits is characterized by comprising a support column assembly, a protective net assembly, and a retaining wall. The bottom of the protective net assembly is provided with a connecting threaded hole that matches the support column assembly. According to the size of the protective net assembly, several support column assemblies are spaced apart on the ground around the foundation pit. The support column assemblies and the protective net assembly are connected by bolt assemblies. After the edge of the foundation pit has hardened, a retaining wall is set at the bottom of the protective net assembly, and the lower part of the support column assembly is wrapped inside the retaining wall.

[0006] According to the above technical solution, it also includes a sleeve, which is fitted onto the support column assembly, and the length of the sleeve is not less than the height of the retaining wall.

[0007] According to the above technical solution, the support column assembly includes a support column, a mounting plate, and a connecting bolt assembly. A tapered head is provided at the bottom of the support column, and the mounting plate is fixed to the top of the support column. Bolt holes are provided on the mounting plate.

[0008] The protective net assembly includes a frame and a protective net. The bottom of the frame has bolt holes that match the mounting plate. The connecting bolt assembly passes through the bolt holes of the frame and the mounting plate.

[0009] According to the above technical solution, the water-retaining wall is set with two walls, and the sleeve is fixed between the two walls.

[0010] According to the above technical solution, the depth of the support column assembly driven into the ground is determined based on the size of the protective net structure, and the depth is not less than 30cm.

[0011] According to the above technical solution, the sleeve is made of plastic.

[0012] The construction method for standardized protection devices for foundation pits is characterized by the following steps:

[0013] S1: Based on the structure of the protective netting assembly, nail the support column assembly into the ground around the foundation pit;

[0014] S2: Install the protective netting assembly onto the support column assembly;

[0015] S3: Harden the edges of the foundation pit;

[0016] S4: Construct a retaining wall at the bottom of the protective net assembly.

[0017] According to the above technical solution, it also includes step S0, which is located before the construction of step S1;

[0018] S0: A sleeve is fitted onto each support column assembly.

[0019] According to the above technical solution, in step S4, between the two water-retaining walls, a matching installation groove is reserved on the two water-retaining walls according to the setting position of the sleeve, and the sleeve is fixed by the two installation grooves.

[0020] The present invention has the following beneficial effects:

[0021] 1. By setting up support column assemblies, the protective netting assemblies are installed on the ground around the foundation pit before the edge of the pit hardens, serving a protective function. After the edge of the foundation pit hardens, a retaining wall is set at the bottom of the protective netting assemblies. The retaining wall not only serves to block water but also provides effective support for the protective netting assemblies, and the protective netting assemblies and the retaining wall are integrated as one unit.

[0022] Compared to the prior art, in the comparative documents, a temporary protective net is set up before the edge of the foundation pit hardens; after the edge of the foundation pit hardens, a retaining wall and a formal protective net are constructed on the retaining wall, and the temporary protective net is removed. Based on the above measures of the present invention, the setting of the temporary protective net is omitted, and the formal protective net structure can be installed in advance before the edge of the foundation pit hardens, effectively improving work efficiency and reducing personnel costs.

[0023] 2. A sleeve is provided inside the support column assembly, and the support column assembly is placed inside the water retaining wall through the sleeve, which facilitates the subsequent disassembly of the support column assembly. Attached Figure Description

[0024] Figure 1 This is a flowchart of the existing technology construction process;

[0025] Figure 2 This is a construction flowchart of the first embodiment of the present invention;

[0026] Figure 3 This is a construction flowchart of the second embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of an embodiment provided by the present invention;

[0028] Figure 5 This is a schematic diagram of the support column assembly structure provided in an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the protective net assembly structure according to an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure between the retaining wall and the sleeve according to an embodiment of the present invention;

[0031] In the diagram, 1-1, support column; 1-11, conical head; 1-2, mounting plate; 1-21, bolt hole; 1-3, connecting bolt assembly; 2, protective net assembly; 2-1, frame; 2-2, protective net; 3, water retaining wall; 3-1, mounting groove; 4, sleeve; 5, ground. Detailed Implementation

[0032] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] Reference Figures 2-7 As shown, the present invention provides a standardized protection device for foundation pits.

[0034] Example 1

[0035] The structure includes a support column assembly, a protective net assembly 2, and a retaining wall 3. The bottom of the protective net assembly is provided with a connecting threaded hole that matches the support column assembly. According to the size of the protective net assembly, several support column assemblies are set at intervals on the ground 5 around the foundation pit. The support column assembly and the protective net assembly are connected by bolt assemblies. After the edge of the foundation pit hardens, a retaining wall is set at the bottom of the protective net assembly, and the lower part of the support column assembly is wrapped in the retaining wall.

[0036] In this embodiment, by setting up support column assemblies, the protective netting assembly is installed on the ground around the foundation pit before the edge of the pit hardens, thus providing protection. After the edge of the foundation pit hardens, a retaining wall is set at the bottom of the protective netting assembly. The retaining wall not only serves to block water but also provides effective support for the protective netting assembly, and the protective netting assembly and the retaining wall are integrated as one unit.

[0037] Compared to the prior art, in the comparative documents, a temporary protective net is set up before the edge of the foundation pit hardens; after the edge of the foundation pit hardens, a retaining wall and a formal protective net are constructed on the retaining wall, and the temporary protective net is removed. Based on the above measures of the present invention, the setting of the temporary protective net is omitted, and the formal protective net structure can be installed in advance before the edge of the foundation pit hardens, effectively improving work efficiency and reducing personnel costs.

[0038] Example 2

[0039] The structure and principle of Example 2 are similar to those of Example 1, except that it also includes a sleeve 4, which is fitted onto the support column assembly. The length of the sleeve is not less than the height of the retaining wall. In the above process, the sleeve is fitted onto the support column assembly before the pre-embedded support column is constructed. A sleeve is provided inside the support column assembly, through which the support column assembly is placed within the retaining wall, facilitating subsequent disassembly of the support column assembly.

[0040] In embodiments 1 and 2, a preferred structural form of the support column assembly and the protective net assembly is given. Specifically, the support column assembly includes a support column 1-1, a mounting plate 1-2, and a connecting bolt assembly 1-3. A tapered head 1-11 is provided at the bottom of the support column, and the mounting plate is fixed to the top of the support column. Bolt holes 1-21 are provided on the mounting plate. The size of the sleeve matches the size of the support column, and the support column can only slide along the length of the sleeve inside the sleeve.

[0041] The protective net assembly includes a frame 2-1 and a protective net 2-2. The bottom of the frame has bolt holes that match the mounting plate, and the connecting bolt assembly passes through the bolt holes of the frame and the mounting plate.

[0042] In embodiments 1 and 2, preferably, the water-retaining wall consists of two walls, with the sleeve fixed between the two walls.

[0043] In embodiments 1 and 2, preferably, the depth to which the support column assembly is driven into the ground is determined according to the size of the protective net structure, and the depth is not less than 30cm.

[0044] In embodiments 1 and 2, preferably, the sleeve is made of plastic. The sleeve is ultimately left inside the retaining wall, while the pre-embedded components are recycled. Using plastic can effectively save costs.

[0045] In addition, the present invention also provides a construction method for a standardized protection device for foundation pits.

[0046] Example 3

[0047] like Figures 2-3 As shown, it includes the following steps:

[0048] S1: Based on the structure of the protective netting assembly, nail the support column assembly into the ground around the foundation pit;

[0049] S2: Install the protective netting assembly onto the support column assembly;

[0050] S3: Harden the edges of the foundation pit;

[0051] S4: Construct a retaining wall at the bottom of the protective net assembly.

[0052] Example 4

[0053] Based on Example 1, step S0 is also included, which is located before the construction of step S1;

[0054] S0: A sleeve is fitted onto each support column assembly.

[0055] In embodiments 1 and 2, in step S4, between the two water-retaining walls, according to the setting position of the sleeve, matching installation grooves 3-1 are reserved on the two water-retaining walls, and the sleeve is fixed by the two installation grooves.

[0056] The above are merely preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. Therefore, any equivalent changes made in accordance with the claims of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A construction method for a standardized protection device for foundation pits, characterized in that: A standardized foundation pit protection device is adopted, which includes a support column assembly, a protective net assembly, and a retaining wall. The bottom of the protective net assembly is provided with a connecting threaded hole that matches the support column assembly. According to the size of the protective net assembly, several support column assemblies are set at intervals on the ground around the foundation pit. The support column assemblies and the protective net assembly are connected by bolt assemblies. After the edge of the foundation pit hardens, a retaining wall is set at the bottom of the protective net assembly, and the lower part of the support column assembly is wrapped in the retaining wall. The construction method includes the following steps: S1: Based on the structure of the protective netting assembly, nail the support column assembly into the ground around the foundation pit; S2: Install the protective netting assembly onto the support column assembly; S3: Harden the edges of the foundation pit; S4: Construct a retaining wall at the bottom of the protective net assembly.

2. The construction method of the standardized foundation pit protection device according to claim 1, characterized in that: It also includes step S0, which is located before step S1. S0: A sleeve is fitted onto each support column assembly.

3. The construction method of the standardized foundation pit protection device according to claim 2, characterized in that: In step S4, between the two retaining walls, according to the installation position of the sleeve, matching installation grooves are reserved on the two retaining walls, and the sleeve is fixed by the two installation grooves.

4. The construction method of the standardized foundation pit protection device according to claim 1, characterized in that: The standardized protection device for the foundation pit also includes a sleeve, which is fitted onto the support column assembly, and the length of the sleeve is not less than the height of the retaining wall.

5. The construction method of the standardized foundation pit protection device according to claim 1 or 4, characterized in that: The support column assembly includes a support column, a mounting plate, and a connecting bolt assembly. The support column has a tapered head at its bottom, and the mounting plate is fixed to the top of the support column. The mounting plate has bolt holes. The protective net assembly includes a frame and a protective net. The bottom of the frame has bolt holes that match the mounting plate. The connecting bolt assembly passes through the bolt holes of the frame and the mounting plate.

6. The construction method of the standardized foundation pit protection device according to claim 1 or 4, characterized in that: The retaining wall consists of two walls, with the sleeve fixed between the two walls.

7. The construction method of the standardized foundation pit protection device according to claim 1 or 4, characterized in that: The depth to which the support column assembly is driven into the ground is determined based on the dimensions of the protective netting structure, and the depth shall not be less than 30cm.

8. The construction method of the standardized foundation pit protection device according to claim 4, characterized in that: The sleeve is made of plastic.

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