Manual excavation type foundation pit assembly type steel plate wall protecting device

Abstract

The utility model belongs to the technical field of civil construction, and particularly provides a manual excavation type foundation pit assembly type steel plate protection wall device which comprises a plurality of sections of annular protection walls, each annular protection wall comprises a plurality of sets of arc-shaped plates, one side of each arc-shaped plate is provided with an assembly protrusion, the other side of each arc-shaped plate is provided with an assembly notch, and the assembly protrusions are inserted into the assembly notches of the adjacent arc-shaped plates. A plurality of bolt holes are formed in the positions, corresponding to the splicing protrusions and the splicing notches, of the two sides of the arc-shaped plates, connecting screws penetrate through the bolt holes of the two adjacent arc-shaped plates at the same time to connect the arc-shaped plates, and the ends of the connecting screws are inserted into a soil body of the side wall of the foundation pit to fix the annular protection wall. The device can be quickly assembled and disassembled, the construction period is shortened, and the device can be repeatedly used.

Description

Technical Field

[0001] The utility model relates to the technical field of civil engineering and construction, and particularly relates to an assembled steel plate retaining wall device for an artificial excavation type foundation pit. Background Art

[0002] Due to its elasticity and adaptability under complex geological conditions, artificial excavation type foundation pits are widely used in various projects. During the process of artificial excavation and hole formation, the hole wall is prone to collapse and the soil body is prone to landslide. Therefore, it is necessary to protect the hole wall through a retaining wall structure during hole formation. However, traditional foundation pit support methods often have certain limitations, such as long construction periods, high costs, and non-recyclable materials.

[0003] Conventional foundation pit support forms can adopt cast-in-situ reinforced concrete retaining wall structures to support the foundation pit hole wall or assembled steel-concrete retaining walls. The cast-in-situ reinforced concrete retaining wall structure for supporting the foundation pit hole wall greatly delays the construction time of the foundation pit project. The assembled steel-concrete retaining wall is processed in the factory, assembled on-site, and lowered into the foundation pit and poured together with the foundation pile. Although it avoids the formwork support, pouring, and curing links of the cast-in-situ retaining wall and effectively shortens the construction period, such assembled retaining walls cannot be recycled after the concrete in the foundation pit is poured, resulting in high construction costs and poor economy. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide an assembled steel plate retaining wall device for an artificial excavation type foundation pit, which can be quickly assembled and disassembled, shorten the construction period, and can be reused.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is: an assembled steel plate retaining wall device for an artificial excavation type foundation pit, which includes multiple sections of annular retaining walls. The annular retaining wall includes several groups of arc-shaped plates. One side of the arc-shaped plate is provided with a splicing protrusion, and the other side is provided with a splicing notch. The splicing protrusion is inserted into the splicing notch of the adjacent arc-shaped plate. A plurality of bolt holes are provided on both sides of the arc-shaped plate corresponding to the positions of the splicing protrusion and the splicing notch. Connecting screws simultaneously pass through the bolt holes of two adjacent groups of arc-shaped plates to connect the arc-shaped plates. The end of the connecting screw is inserted into the soil body on the side wall of the foundation pit to fix the annular retaining wall.

[0006] In a preferred solution, the length of the connecting screw is 350 mm to 500 mm.

[0007] In a preferred solution, the end of the connecting screw is provided with a tip.

[0008] In a preferred solution, a plurality of insertion grooves and insertion rods are respectively provided at the upper and lower ends of the arc-shaped plate. The insertion rod of the arc-shaped plate is inserted into the insertion groove of the adjacent lower arc-shaped plate.

[0009] In a preferred embodiment, a support screw is provided at the lower end of the lowermost annular retaining wall. A limit groove for cooperating with the insertion rod is provided at the upper end of the support screw, a support block is provided at the lower end of the support screw, and a threaded hole for cooperating with the support screw is provided on the support block.

[0010] The assembled steel plate retaining wall device for artificial excavation type foundation pits provided by the present utility model has the following beneficial effects:

[0011] 1. After the multi-group arc-shaped plates of each section of the annular retaining wall of the present utility model are spliced, while realizing the connection of adjacent two groups of arc-shaped plates through the connecting screws, the connecting screws are inserted into the soil body inside the retaining wall to realize the fixed installation of the annular retaining wall. It can be assembled on-site, installed section by section along with the construction of the pile hole, form a connection with the pile hole soil body, the whole structure is stable, can be quickly assembled and disassembled, shorten the construction period, and can be reused.

[0012] 2. A support screw and a support block are provided at the lower end of the annular retaining wall at the bottom. On the one hand, it provides multi-point support for the annular retaining wall without affecting the lateral expansion excavation. On the other hand, it can improve the support stability of the annular retaining wall and enhance the support strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present utility model will be further described below in conjunction with the drawings and embodiments:

[0014] Figure 1 is the top view of the annular retaining wall;

[0015] Figure 2 is the structural schematic diagram of the arc-shaped plate;

[0016] Figure 3 is the structural schematic diagram of the connecting screw;

[0017] Figure 4 is the structural schematic diagram of the arc-shaped plate in Embodiment 2;

[0018] Figure 5 is the connection structural schematic diagram of the support screw and the support block;

[0019] Figure 6 is Figure 5 the structural schematic diagram from another angle;

[0020] Figure 7 is the overall structural schematic diagram in Embodiment 2;

[0021] In the figure: arc-shaped plate 1, assembling protrusion 101, assembling notch 102, bolt hole 103, insertion slot 104, insertion rod 105; connecting screw 2; support screw 3, limit groove 301; support block 4, threaded hole 401. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] Example 1:

[0023] As Figures 1 - 3 shown, an assembled steel plate retaining wall device for an artificial excavation type foundation pit includes multiple sections of annular retaining walls. The annular retaining wall includes several groups of arc plates 1. In this embodiment, each section of the annular retaining wall includes four groups of arc plates 1. The arc plates are made of steel plates. The outer diameter of the spliced annular retaining wall is the same as the inner diameter of the artificial excavation round pile hole. Assuming the diameter of the dug pile is 800 mm, correspondingly, the outer diameter of the annular retaining wall is 800 mm, the inner diameter is 790 mm, and the steel plate thickness is 10 mm.

[0024] One side of the arc plate 1 is provided with an assembly protrusion 101, and the other side is provided with an assembly notch 102. The assembly protrusion 101 is inserted into the assembly notch 102 of the adjacent arc plate 1. The adjacent arc plates 1 are connected through the inserted structure to form a whole. A plurality of bolt holes 103 are provided at the positions corresponding to the assembly protrusion 101 and the assembly notch 102 on both sides of the arc plate 1. The bolt holes 103 are arranged vertically. The connecting screw 2 passes through the bolt holes 103 of the adjacent two groups of arc plates 1 at the same time to connect the arc plates 1. The end of the connecting screw 2 is inserted into the soil body on the side wall of the foundation pit to fix the annular retaining wall.

[0025] The connecting screw 2 not only connects the adjacent two groups of arc plates 1, but also inserts into the soil body to ensure the stability of the structure.

[0026] The length of the connecting screw 2 is 350 mm to 500 mm. In this embodiment, as Figure 3 shown, the length of the connecting screw 2 is 450 mm. Among them, the outer side of the 100 mm part close to the nut is provided with an external thread to cooperate with the bolt hole 103, and the rest is a smooth rod, which is convenient for inserting into the soil body.

[0027] During specific use, the end of the connecting screw 2 is provided with a tip to facilitate insertion into the soil body.

[0028] The working principle of this device is as follows:

[0029] When manually excavating the pile hole, to prevent the foundation pit from collapsing, after the excavation is completed, the annular retaining wall is installed in sections in the pile hole. After each layer of the annular retaining wall is spliced by multiple groups of arc plates 1, while the adjacent two groups of arc plates 1 are connected by the connecting screw 2, the connecting screw 2 is inserted into the soil body inside the retaining wall to realize the fixed installation of the annular retaining wall. After installation, the excavation of the pile hole at the next depth is carried out.

[0030] This device is assembled on site. Along with the construction of the pile hole, it is installed in sections, forms a connection with the pile hole soil body. The whole structure is stable, can be quickly assembled and disassembled, shortens the construction period, and can be reused.

[0031] Example 2:

[0032] Different from Embodiment 1, as Figure 4 shown, a plurality of insertion grooves 104 and insertion rods 105 are respectively provided at the upper and lower ends of the arc-shaped plate 1. In this embodiment, each group of arc-shaped plates 1 corresponds to two insertion grooves 104 and insertion rods 105, and the insertion rod 105 of the arc-shaped plate 1 is inserted into the insertion groove 104 of the adjacent lower arc-shaped plate 1.

[0033] The connection between two adjacent upper and lower annular retaining walls is realized, and the stability of the support is improved.

[0034] Preferably, as Figures 5 - 7 shown, a support screw 3 is provided at the lower end of the lowermost annular retaining wall. A limit groove 301 for cooperating with the insertion rod 105 is provided at the upper end of the support screw 3, a support block 4 is provided at the lower end of the support screw 3, and a threaded hole 401 for cooperating with the support screw 3 is provided on the support block 4.

[0035] After the excavation depth of the foundation pit is completed, when it is necessary to expand and excavate the side wall at the lower end of the foundation pit, rotate the support block 4 to adjust its position relative to the support screw 3, so that the length from the lower end of the support screw 3 to the bottom of the support block 4 is less than the distance from the lower end of the insertion rod 105 to the bottom of the foundation pit. Insert the insertion rod 105 of the lowermost annular retaining wall into the limit groove 301 of the support screw 3, and then rotate the support block 4 to make the support block 4 move downward until the support block 4 contacts the bottom of the foundation pit, so that the support screw 3 and the support block 4 support the bottom of the annular retaining wall. On the one hand, it does not affect the lateral expansion excavation, and on the other hand, it can improve the support stability of the annular retaining wall and improve the support strength.

[0036] The above embodiments are only the preferred technical solutions of the present invention and should not be regarded as limitations on the present invention. The embodiments in this application and the features in the embodiments can be combined arbitrarily without conflict. The protection scope of the present invention should be the technical solutions recorded in the claims, including equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. An assembled steel plate retaining wall device for artificial excavation type foundation pits, characterized in that, It includes multiple sections of annular retaining walls. The annular retaining wall includes several groups of arc-shaped plates (1). One side of the arc-shaped plate (1) is provided with an assembly protrusion (101), and the other side is provided with an assembly notch (102). The assembly protrusion (101) is inserted into the assembly notch (102) of the adjacent arc-shaped plate (1). A number of bolt holes (103) are provided at positions corresponding to the assembly protrusion (101) and the assembly notch (102) on both sides of the arc-shaped plate (1). The connecting screw (2) passes through the bolt holes (103) of the adjacent two groups of arc-shaped plates (1) at the same time to connect the arc-shaped plates (1). The end of the connecting screw (2) is inserted into the soil body of the foundation pit side wall to fix the annular retaining wall.

2. The assembled steel plate retaining wall device for artificial excavation foundation pit according to claim 1, wherein The length of the connecting screw (2) is 350 mm to 500 mm.

3. The assembled steel plate retaining wall device for manual excavation type foundation pit according to claim 1, characterized in that, The end of the connecting screw (2) is provided with a tip.

4. The assembled steel plate retaining wall device for artificial excavation foundation pit according to claim 1, characterized in that, A number of insertion slots (104) and insertion rods (105) are respectively provided at the upper and lower ends of the arc-shaped plate (1). The insertion rod (105) of the arc-shaped plate (1) is inserted into the insertion slot (104) of the adjacent lower arc-shaped plate (1).

5. The assembled steel plate retaining wall device for artificial excavation foundation pit according to claim 4, characterized in that, A support screw rod (3) is provided at the lower end of the lowermost annular retaining wall. A limit slot (301) matching the insertion rod (105) is provided at the upper end of the support screw rod (3). A support block (4) is provided at the lower end of the support screw rod (3). A threaded hole (401) matching the support screw rod (3) is provided on the support block (4).

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