A reinforced protective structure for foundation pit side wall

Abstract

The invention discloses a reinforced protection structure for the side wall of a foundation pit, wherein a side wall protection net is fixedly connected between adjacent guard posts, the guard posts are fitted to the side wall of the foundation pit, and steel bars inserted into the side wall of the foundation pit are fixedly installed on the rear surfaces of the guard posts. The device uses guard posts that can be telescopic and limited as guard posts for the side wall of the foundation pit, and the rear walls of the guard posts are inserted into the side wall of the foundation pit for fixation by steel bars. The side wall protection net is connected between the guard posts evenly distributed on the side wall of the foundation pit to shield the soil layer of the side wall to prevent it from collapsing. The protection net and the guard posts, and between the guard posts and the side wall of the foundation pit are easy to disassemble, can be used multiple times, and save resources. At the same time, compared with traditional guard post casting and steel mesh laying, the device has a short construction time, can avoid the phenomenon of concrete guard arms on the surface of the steel mesh falling off after long-term use, and avoid harm to users.

Description

Technical Field

[0001] The invention belongs to the technical field of reinforced protective structures, and in particular, relates to a reinforced protective structure for a foundation pit side wall. Background Art

[0002] In the prior art, during the process of excavating a foundation pit, guard piles are firstly drilled and cast at a selected location, and the foundation pit is excavated along the guard piles. The soil between the piles is protected by shotcrete. First, a steel mesh is laid between the guard piles, and then a concrete retaining wall is sprayed on the outside. The thickness of the retaining wall is about 100 mm.

[0003] This construction method protects the side walls of the foundation pit with steel mesh and achieves waterproofing through the sprayed concrete retaining wall. Although it can achieve protective effects, this construction method takes a long time to cast guard piles and lay steel mesh, makes it difficult to dismantle the protective structure, and the materials cannot be reused many times, resulting in a waste of resources. At the same time, when used for a long time, the concrete guardrail on the surface of the steel mesh will fall off, which can easily cause harm to construction workers working in the foundation pit. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a reinforced protective structure for the side wall of a foundation pit. To solve the above technical problem, the basic concept of the technical solution adopted by the present invention is:

[0005] A reinforced protection structure for the side wall of a foundation pit, comprising guard posts and side wall protection nets, wherein the side wall protection nets are fixedly connected between adjacent guard posts, the guard posts are fitted to the side wall of the foundation pit, and steel bars inserted into the side wall of the foundation pit are fixedly installed on the rear surface of the guard posts; the guard posts comprise rectangular posts, and a rectangular groove is provided in the middle of the upper surface of the rectangular post, a rectangular rod is slidably inserted into the rectangular groove of the rectangular post, a lifting drive member used in conjunction with the rectangular rod is mounted at the lower end of the inner cavity of the rectangular post, and a limiting fixing device matching the rectangular rod is mounted on the upper end of the outer surface of the rectangular post.

[0006] Furthermore, the lifting drive component includes a first bearing fixedly installed at the bottom end of the rectangular groove of the rectangular column, a screw is fixedly inserted into the inner ring surface of the first bearing, and the upper end of the screw is threadedly connected to the rectangular rod, a first bevel gear is fixedly sleeved on the lower end of the outer side surface of the screw, a second bearing is embedded and installed at the lower end of the side wall of the rectangular column, a rocker is fixedly inserted into the inner ring surface of the second bearing, and a second bevel gear is fixedly installed on one end of the rocker located in the rectangular groove of the rectangular column, and the second bevel gear is meshed with the first bevel gear.

[0007] Furthermore, the limiting and fixing device includes grooves opened at the upper ends of the four walls of the rectangular groove of the rectangular column, an extrusion plate is slidably inserted in the groove, and the extrusion plate is tightly fitted with the outer wall of the rectangular rod, a circular groove is opened in the middle of the outer side surface of the extrusion plate, bolts are screwed around the upper end of the outer wall of the rectangular column, a gasket is sleeved on the outside of the bolt, and the gasket is located between the bolt nut and the outer side surface of the rectangular column, a circular plate is fixedly assembled on the inner end of the bolt, the circular plate is inserted in the circular groove, a limiting ring is fixedly assembled on the outer side of the inner wall of the circular groove, and the circular plate is located between the limiting ring and the inner side surface of the circular groove.

[0008] Furthermore, the side wall protection net includes a grid support plate, and the grid support plate is tightly fitted to the side wall of the foundation pit, waterproof fibers are fixedly installed in the mesh holes of the grid support plate, a geotextile layer is fixedly installed on the front surface of the grid support plate, and a waterproof film is fixedly installed on the front surface of the geotextile layer, and flexible connecting strips are evenly pasted on the edges of the outer surface of the waterproof film and the grid support plate, and the flexible connecting strips are fixedly installed on the front and rear surfaces of the guardrails by bolts.

[0009] After adopting the above technical scheme, the present invention has the following beneficial effects compared with the prior art.

[0010] This scheme designs a reinforced protection structure for the side walls of foundation pits. This device uses telescopic and limit-fixed guardrails as guardrails for the side walls of foundation pits. The rear wall of the guardrails is fixed by inserting steel bars into the side walls of foundation pits. The side wall protection net is connected between the guardrails evenly distributed on the side walls of foundation pits to shield the soil layer of the side walls from collapse. The protection net and the guardrails, as well as the guardrails and the side walls of foundation pits are easy to disassemble and can be reused multiple times, saving resources. At the same time, compared with traditional guardrail casting and steel mesh laying, the device has a short construction time, can avoid the phenomenon of concrete guard arms on the surface of the steel mesh falling off after long-term use, and avoid harm to users.

[0011] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are part of this application and are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the drawings described below are only some embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. In the drawings:

[0013] Figure 1 It is a schematic diagram of the structure of the present invention;

[0014] Figure 2 It is a schematic cross-sectional view of the bollard structure in the present invention;

[0015] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure of the details at point a;

[0016] Figure 4 It is a schematic diagram of the structure of the side wall protection net in the present invention.

[0017] In the figure: 1 guardrail, 11 rectangular column, 12 rectangular rod, 13 lifting drive member, 131 first bearing, 132 screw, 133 first bevel gear, 134 second bearing, 135 rocker, 136 second bevel gear, 14 limiting fixing device, 141 groove, 142 extrusion plate, 143 circular groove, 144 bolt, 145 gasket, 146 circular plate, 147 limiting ring, 2 side wall protection net, 21 grid bracket plate, 22 waterproof fiber, 23 geotextile layer, 24 waterproof film, 3 flexible connecting strip.

[0018] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention. Example

[0020] like Figures 1 to 4 As shown, a reinforced protection structure for the side wall of a foundation pit described in this embodiment includes guardrails 1 and side wall protection nets 2, side wall protection nets 2 are fixedly connected between adjacent guardrails 1, the guardrails 1 are attached to the side wall of the foundation pit, and steel bars inserted into the side wall of the foundation pit are fixedly installed on the rear surface of the guardrails 1.

[0021] like Figure 2 As shown, a longer steel bar is inserted into the side wall of the foundation pit, and the front end of the steel bar is welded to the guardrail 1 to fix the guardrail 1 on the side wall of the foundation pit. The protective net 2 is cut to size as required, and the connecting strip 3 on the protective net 2 is fixed to the front and rear side walls of the guardrail 1 by bolts. The bolts are hexagon socket bolts. When the device needs to be disassembled for next use, part of the guardrail 1 is pulled out, and the steel bar can be cut with a tool. The bolts are removed to separate the guardrail 1 from the protective net 2, which can be reused multiple times and save resources.

[0022] The guardrail 1 includes a rectangular column 11, and a rectangular groove is opened in the middle of the upper surface of the rectangular column 11, a rectangular rod 12 is slidably inserted in the rectangular groove of the rectangular column 11, a lifting drive member 13 used in conjunction with the rectangular rod 12 is installed at the lower end of the inner cavity of the rectangular column 11, and a limiting fixing device 14 matching the rectangular rod 12 is installed at the upper end of the outer surface of the rectangular column 11.

[0023] The rectangular rod 12 is controlled to rise and fall in the rectangular groove of the rectangular rod 12 by the lifting drive 13, and the position of the rectangular rod 12 in the rectangular groove is fixed by the limiting fixing device 14. The position of the rectangular rod 12 after movement is completely limited by the limiting fixing device 14, which cooperates with the side wall protection net 2 to play a better supporting and protective role.

[0024] The lifting drive member 13 includes a first bearing 131 fixedly assembled at the bottom end of the rectangular groove of the rectangular column 11, a screw 132 is fixedly inserted into the inner ring surface of the first bearing 131, and the upper end of the screw 132 is screwed to the rectangular rod 12, and a first bevel gear 133 is fixedly sleeved at the lower end of the outer side surface of the screw 132, a second bearing 134 is embedded and assembled at the lower end of the side wall of the rectangular column 11, a rocker 135 is fixedly inserted into the inner ring surface of the second bearing 134, and a second bevel gear 136 is fixedly assembled at one end of the rocker 135 located in the rectangular groove of the rectangular column 11, and the second bevel gear 136 is meshed with the first bevel gear 133.

[0025] By turning the crank 135, the second bevel gear 136 is driven to rotate, the second bevel gear 136 drives the first bevel gear 133 to rotate, and the second bevel gear 133 drives the screw 132 to rotate. The screw 132 rotates in the rectangular rod 12. Because the screw 132 is screwed to the rectangular rod 12, the rectangular rod 12 cannot rotate with the screw 132 in the rectangular groove. According to the screw principle, the rectangular rod 12 can only move up and down along the screw 132, thereby realizing the up and down lifting control of the rectangular rod 12.

[0026] The limiting fixing device 14 includes a groove 141 opened at the upper ends of the four walls of the rectangular groove of the rectangular column 11, an extrusion plate 142 is slidably inserted in the groove 141, and the extrusion plate 142 is tightly fitted with the outer wall of the rectangular rod 12, and a circular groove 143 is opened in the middle of the outer side surface of the extrusion plate 142, bolts 144 are screwed around the upper end of the outer wall of the rectangular column 11, a gasket 145 is sleeved on the outer side of the bolt 144, and the gasket 145 is located between the nut of the bolt 144 and the outer side surface of the rectangular column 11, a circular plate 146 is fixedly assembled on the inner end of the bolt 144, and the circular plate 146 is inserted in the circular groove 143, and a limiting ring 147 is fixedly assembled on the outer side of the inner wall of the circular groove 143, and the circular plate 146 is located between the limiting ring 147 and the inner side surface of the circular groove 143.

[0027] When the rectangular rod 12 moves to a suitable position, the bolt 144 is tightened, and the nut of the bolt 144 squeezes and fixes the gasket 145 on the side wall of the rectangular column 11. The circular plate 146 at the inner end of the bolt 144 moves inward and squeezes on the inner wall of the circular groove 143, pushing the squeezing plate 142 to squeeze on the outer wall of the rectangular rod 12, thereby limiting and fixing the position of the rectangular rod 12.

[0028] The side wall protection net 2 includes a grid support plate 21, and the grid support plate 21 fits tightly against the side wall of the foundation pit. Waterproof fibers 22 are fixedly installed in the mesh of the grid support plate 21. A geotextile layer 23 is fixedly installed on the front surface of the grid support plate 21. A waterproof film 24 is fixedly installed on the front surface of the geotextile layer 23. Flexible connecting strips 3 are evenly pasted on the edges of the outer surfaces of the waterproof film 24 and the grid support plate 21. The flexible connecting strips 3 are fixedly installed on the front and rear surfaces of the guardrail 1 by bolts.

[0029] like Figure 4 As shown, the grid support plate 21, the geotextile layer 23 and the waterproof film 24 are adhered and fixed to each other by glue points evenly embedded thereon. The grid support plate 21 is a steel grid plate filled with fixed waterproof fibers 22. The waterproof fibers 22 can be polyester fibers, which play a certain waterproof role. The geotextile layer 23 is arranged on the grid support plate 21 to shield the side wall soil layer to prevent its collapse. The waterproof film 24 plays a waterproof role to prevent rainwater from scouring the side walls of the foundation pit. The overall device has a shorter construction time than traditional pile casting and steel mesh laying, which can avoid the concrete guard arm on the surface of the steel mesh from falling off after long-term use, thereby avoiding harm to users.

[0030] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A reinforced protective structure for the side wall of a foundation pit, characterized in that: It comprises guardrails (1) and side wall protection nets (2), the side wall protection nets (2) being fixedly connected between adjacent guardrails (1), the guardrails (1) being attached to the side walls of the foundation pit, and steel bars plugged into the side walls of the foundation pit being fixedly installed on the rear surfaces of the guardrails (1); The guard post (1) comprises a rectangular column (11), wherein a rectangular groove is provided in the middle of the upper surface of the rectangular column (11), a rectangular rod (12) is slidably inserted into the rectangular groove of the rectangular column (11), a lifting drive member (13) for use with the rectangular rod (12) is mounted at the lower end of the inner cavity of the rectangular column (11), and a limiting fixing device (14) matching the rectangular rod (12) is mounted at the upper end of the outer surface of the rectangular column (11); The lifting drive member (13) comprises a first bearing (131) fixedly mounted on the bottom end of a rectangular groove of a rectangular column (11); a screw rod (132) is fixedly inserted on the inner ring surface of the first bearing (131); the upper end of the screw rod (132) is threadedly connected to the rectangular column (12); a first bevel gear (133) is fixedly sleeved on the lower end of the outer side surface of the screw rod (132); a second bearing (134) is embedded and mounted on the lower end of the side wall of the rectangular column (11); a rocker (135) is fixedly inserted on the inner ring surface of the second bearing (134); a second bevel gear (136) is fixedly mounted on one end of the rocker rod (135) located in the rectangular groove of the rectangular column (11); and the second bevel gear (136) is meshed with the first bevel gear (133); The position-limiting fixing device (14) comprises a groove (141) formed at the upper ends of four walls of the rectangular groove of the rectangular column (11), an extrusion plate (142) is slidably inserted in the groove (141), and the extrusion plate (142) is tightly fitted with the outer wall of the rectangular rod (12), a circular groove (143) is formed in the middle of the outer side surface of the extrusion plate (142), and bolts (144) are screwed around the upper ends of the outer walls of the rectangular column (11), and the bolts (144) are screwed to the inner sides of the rectangular column (11). ) is sleeved on the outer side of the bolt (144), and the washer (145) is located between the nut of the bolt (144) and the outer side surface of the rectangular column (11); the inner end of the bolt (144) is fixedly equipped with a circular plate (146), and the circular plate (146) is inserted into the circular groove (143); the outer side of the inner wall of the circular groove (143) is fixedly equipped with a limiting ring (147), and the circular plate (146) is located between the limiting ring (147) and the inner side surface of the circular groove (143); The side wall protection net (2) comprises a grid support plate (21), and the grid support plate (21) is tightly fitted to the side wall of the foundation pit, waterproof fibers (22) are fixedly installed in the mesh of the grid support plate (21), a geotextile layer (23) is fixedly installed on the front surface of the grid support plate (21), and a waterproof film (24) is fixedly installed on the front surface of the geotextile layer (23), and flexible connecting strips (3) are evenly adhered to the edges of the outer surfaces of the waterproof film (24) and the grid support plate (21), and the flexible connecting strips (3) are fixedly installed on the front and rear surfaces of the guardrail (1) by bolts.

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