A rock and soil retaining equipment for foundation pit construction

Abstract

The present invention relates to the field of foundation pit construction, and specifically to a rock and soil retaining equipment for foundation pit construction, including an outer protection component, an inner protection component, a fixing component, and a connecting component; the outer protection component includes four outer base columns; the inner protection component includes four inner base columns; an outer folding fence component is connected between two adjacent outer base columns; and an inner folding fence component is connected between two adjacent inner base columns. By providing an outer folding fence component and an inner folding fence component, the entire equipment is easy to fold and transport, and is adaptable to foundation pits of different sizes. There is no need to measure the size of the foundation pit during installation. The inner fence and the outer fence limit and support each other, making the entire retaining equipment more stable and not easy to fall over. When dismantling, it is only necessary to release the lock between the inner fence and the outer fence, shrink the inner folding fence component and the outer folding fence component, so that the four inner base columns are close to each other, and the four outer base columns are close to each other, thereby reducing the volume of the entire equipment for easy transportation.

Description

Technical Field

[0001] The invention relates to the field of foundation pit construction, and in particular to rock and soil retaining equipment for foundation pit construction. Background Art

[0002] Foundation pit is an underground space often encountered in the design and construction of urban underground projects and municipal engineering. In order to maintain the stability of the rock and soil in the foundation pit during the excavation of the pit, and to prevent the collapse and instability of the pit wall, various measures are usually required to reinforce the rock and soil around the pit to ensure the stability and safety of the rock and soil of the pit wall. Guarding equipment such as guardrails is one of the most commonly used protective equipment in foundation pit projects.

[0003] Since the retaining equipment is temporarily set up during foundation pit construction, it often needs to be dismantled for reuse after the construction is completed. However, the existing foundation pit retaining devices are often not light enough, which is not conducive to long-distance transportation, and are relatively cumbersome to set up and dismantle, thus affecting the efficiency of installing the retaining equipment. Summary of the invention

[0004] The present invention provides a rock and soil retaining device for foundation pit construction to solve the above problems.

[0005] The present invention discloses a rock and soil retaining device for foundation pit construction, which adopts the following technical scheme: a rock and soil retaining device for foundation pit construction, which comprises an outer protection component, an inner protection component, a fixing component and a connecting component.

[0006] The external protection component is arranged on the ground outside the upper end of the foundation pit and is outside the foundation pit; the external protection component includes four external base columns; the connecting lines between the four external base columns are distributed in a matrix; the external base columns are arranged vertically, and the lower ends are in contact with the ground; an external folding fence component is connected between two adjacent external base columns; the four external base columns and the external folding fence component enclose a rectangular outer fence.

[0007] The inner protection component is arranged on the inner side of the outer protection component and is located at the inner wall of the foundation pit; the inner protection component includes four inner base columns; the lines between the four inner base columns are distributed in a matrix; the inner base columns are arranged vertically; the lower ends of the inner base columns are lower than the lower ends of the outer base columns and extend into the foundation pit; an inner folding fence component is connected between two adjacent inner base columns; the four inner base columns and the inner folding fence component enclose a rectangular inner fence; the inner fence and the outer fence form a double-layer fence in the shape of a Chinese character "U"; an adjustment component is provided between adjacent inner base columns and outer base columns; the adjustment component is used to adjust the distance between the inner fence and the outer fence.

[0008] The fixing assembly is arranged at the lower end of the inner base column, and the fixing assembly is used to fix the inner base column to the side wall of the foundation pit so that the lower end of the inner base column and the side wall of the foundation pit are fitted together, so as to prevent the rock and soil at the upper edge of the foundation pit from falling into the foundation pit through the inner folding fence assembly between adjacent inner base columns.

[0009] The connection assembly is arranged between adjacent inner base columns and outer base columns; after the fixing assembly is used to fix the four inner base columns on the side wall of the foundation pit, the connection assembly is used to fix the inner base columns and the outer base columns, so that the inner fence and the outer fence form a U-shaped double-layer fence; the inner fence prevents the rock and soil at the upper edge of the foundation pit from falling into the foundation pit, and the outer fence prevents pedestrians on the ground outside the foundation pit from falling into the foundation pit. When the outer fence is subjected to a disturbance force far away from the foundation pit or the inner fence is subjected to a disturbance force close to the foundation pit, the connection assembly allows the inner fence and the outer fence to limit and support each other. By providing an outer folding fence assembly and an inner folding fence assembly, the entire equipment is easy to fold and transport, and is adapted to foundation pits of different sizes. There is no need to measure the size of the foundation pit during installation. It is only necessary to place the four inner base columns corresponding to the four corners of the foundation pit respectively, and fix the inner base columns on the side wall of the foundation pit, and lock the inner fence and the outer fence through the connection assembly, so that the inner fence and the outer fence limit and support each other, making the entire enclosure equipment more stable and not easy to fall over. When dismantling, it is only necessary to release the lock between the inner fence and the outer fence, collapse the inner folding fence assembly and the outer folding fence assembly, bring the four inner base columns closer to each other, and the four outer base columns closer to each other, thereby reducing the volume of the entire equipment for easy transportation.

[0010] Furthermore, the adjustment component includes an adjustment rod; the adjustment rod is horizontally arranged and is arranged along the line connecting the projections of the axes of adjacent inner base columns and outer base columns on the horizontal plane; the adjustment rod is a sleeve-type telescopic rod, one end of which is fixedly connected to the upper end of the outer base column, and the other end is fixedly connected to the upper end of the inner base column.

[0011] Furthermore, the adjusting rod is provided with a scale for adjusting the distances between the four outer base columns and the corresponding inner base columns to the same size.

[0012] Furthermore, the fixing assembly includes a plug plate; the plug plate is arranged below the adjusting rod along the axis direction of the adjusting rod; the plug plate is arranged between the inner base column and the outer base column and is located below the outer base column; one end of the plug plate close to the inner base column is fixedly connected to the lower end of the inner base column, and the end close to the outer base column is in a wedge shape with the small end facing the outer base column. The four inner base columns correspond to the four corners of the foundation pit respectively, the plug plate is nailed into the side wall of the foundation pit, and the inner base column is fixed to the side wall of the foundation pit.

[0013] Furthermore, the plug plate is provided with a plurality of plug holes; the plurality of plug holes are evenly distributed along the axis direction of the plug plate adjusting rod; the plug holes are through holes with the axis vertically arranged; a clamping column is provided in the plug hole; the clamping column is arranged along the axis direction of the adjusting rod, and one end of the clamping column close to the inner base column is slidably installed in the hole wall of the plug hole; the end of the clamping column away from the inner base column is arc-shaped; a locking spring is connected between the clamping column and the hole wall of the plug hole.

[0014] The connecting component comprises a sliding hole, a fixing pin and an unlocking structure; the sliding hole is a through hole arranged on the outer base column; and the axis of the sliding hole is arranged vertically.

[0015] The fixing pin is arranged up and down, with a striking plate fixed on the upper end and a pointed cone-shaped lower end; the fixing pin is arranged in the sliding hole for sliding up and down; a matching hole is provided on the side wall at the lower end of the fixing pin, and the axis is arranged radially along the fixing pin; the matching hole opens toward the inner base column; during installation, and when the inner base column is fitted and fixed on the side wall of the foundation pit, and according to the scale on the adjusting rod, the distance between the outer base column and the corresponding inner base column is adjusted, and the sliding hole is made to face the insertion hole, and then the striking plate is hammered downward to nail the fixing pin downward into the rock and soil at the upper end of the foundation pit, and the fixing pin is inserted into the insertion hole, and when the clamping column is facing the matching hole, the locking spring pushes the clamping column into the matching hole, and the inner base column and the outer base column are fixedly connected as one through the fixing pin and the clamping column.

[0016] The unlocking structure is used to drive the clamping column out of the matching hole and pull the fixing pin out of the socket to release the lock between the inner base column and the outer base column when disassembly is required; extend the adjusting rod, pull the plug plate out of the side wall of the foundation pit, and then gather the inner base column and the outer base column to the center of the enclosed rectangle to reduce the size of the equipment for easy transportation.

[0017] Furthermore, the unlocking structure includes an unlocking plate and a pull rope; the unlocking plate is fixed on the clamping column and slidably installed on the inner wall of the plug hole; a pull ring is fixed on one end of the pull rope, and the other end is inserted into the inner base column, and after extending downward along the inner base column to the plug plate, it turns at a right angle and extends along the plug plate; the pull rope and the inner base column are slidably matched, and the pull rope and the plug plate are slidably matched; the pull rope and the unlocking plate are fixedly connected. When unlocking is required, the pull ring is pulled upward, so that the unlocking plate drives the clamping column away from the outer base column, and drives the clamping column out of the matching hole.

[0018] Furthermore, the external folding fence assembly includes an outer railing column and an outer matching plate; there are multiple outer railing columns, which are vertically arranged; the multiple outer railing columns are distributed along the line between two adjacent outer base columns; an outer hinged column is fixed on the outer railing column; two outer baffles distributed in an X shape are provided at the outer hinged column; the two outer baffles are hinged on the outer hinged column at the intersection; the outer baffle between two adjacent outer railing columns is hinged in a diamond shape; there are two outer matching plates; the outer matching plates are distributed up and down, and are in a V shape with the opening facing the outer railing column close to the outer base column; the two outer matching plates are hinged at the intersection and hinged to the outer base column; the outer matching plates and the outer baffles are hinged in a diamond shape.

[0019] Furthermore, the inner folding fence assembly includes inner fence posts and inner matching plates; there are multiple inner fence posts and they are vertically arranged; the multiple inner fence posts are distributed along the line between two adjacent inner base posts; an inner hinged post is fixed on the inner fence post; two inner baffle plates distributed in an X shape are provided at the inner hinged post; the two inner baffle plates are hinged on the inner hinged post at the intersection; the inner baffle plate between two adjacent inner fence posts is hinged in a diamond shape; there are two inner matching plates; the inner matching plates are distributed up and down and are in a V shape with the opening facing the inner fence post close to the inner base post; the two inner matching plates are hinged at the intersection and hinged on the inner base post; the inner matching plates and the inner baffle plates are hinged in a diamond shape.

[0020] Furthermore, the adjusting rod comprises a sub-rod and a mother tube; one end of the sub-rod is fixed on the inner base column; one end of the mother tube is fixed on the outer base column; the sub-rod and the mother tube are slidably connected at the end close to each other; a threaded hole is provided on the mother tube; the threaded hole is a through hole; a top screw is connected to the thread in the threaded hole; the top screw and the sub-rod are in contact. After adjusting the distance between the inner base column and the outer base column, twist the top screw to make the top screw press against the sub-rod and lock the length of the adjusting rod.

[0021] Furthermore, the striking plate is in the shape of a disc, and the lower end of the striking plate is in the shape of a cone with the small end facing downwards, so as to facilitate the insertion of a crowbar between the striking plate and the outer base column when pulling out the fixing pin.

[0022] The beneficial effects of the present invention are as follows: 1. By setting an outer folding fence assembly and an inner folding fence assembly, the entire device is easy to fold and transport, and is adapted to foundation pits of different sizes. There is no need to measure the size of the foundation pit during installation. It is only necessary to place the four inner base columns at the four corners of the foundation pit, and fix the inner base columns on the side walls of the foundation pit. The inner fence and the outer fence are locked by the connecting assembly, so that the inner fence and the outer fence support each other in a limited position, making the entire enclosure device more stable and not easy to fall over. When dismantling, it is only necessary to release the lock between the inner fence and the outer fence, shrink the inner folding fence assembly and the outer folding fence assembly, so that the four inner base columns are close to each other, and the four outer base columns are close to each other, so as to reduce the volume of the entire device for easy transportation.

[0023] 2. The fixing assembly fixes the inner base column to the side wall of the foundation pit so that the lower end of the inner base column fits with the side wall of the foundation pit, so as to prevent the rock and soil at the upper edge of the foundation pit from falling into the foundation pit through the inner folding fence assembly between adjacent inner base columns. The connecting assembly fixes the inner base column and the outer base column so that the inner fence and the outer fence form a U-shaped double-layer fence; the inner fence prevents the rock and soil at the upper edge of the foundation pit from falling into the foundation pit, and the outer fence prevents pedestrians on the ground outside the foundation pit from falling into the foundation pit. When the outer fence is subjected to a disturbance force far away from the foundation pit or the inner fence is subjected to a disturbance force close to the foundation pit, the connecting assembly enables the inner fence and the outer fence to limit and support each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0025] Figure 1 It is a structural schematic diagram of an embodiment of a rock and soil retaining device for foundation pit construction of the present invention;

[0026] Figure 2 It is a front view of an embodiment of a rock and soil retaining device for foundation pit construction of the present invention;

[0027] Figure 3 A top view of an embodiment of a rock and soil retaining device for foundation pit construction of the present invention;

[0028] Figure 4 A cross-sectional view of an embodiment of a rock and soil retaining device for foundation pit construction of the present invention;

[0029] Figure 5 It is a schematic diagram of the inner foundation column and the outer foundation column of an embodiment of a rock and soil retaining device for foundation pit construction of the present invention;

[0030] Figure 6 for Figure 5 Enlarged view of point A in the middle.

[0031] In the figure: 100, outer base column; 110, outer railing column; 111, outer matching plate; 120, outer baffle plate; 200, inner base column; 210, inner railing column; 300, adjustment rod; 400, plug plate; 410, plug hole; 420, clamping column; 430, locking spring; 440, unlocking plate; 450, pull rope; 500, fixing pin; 600, foundation pit; 610, ground. DETAILED DESCRIPTION

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] An embodiment of a rock and soil retaining device for foundation pit construction of the present invention is as follows Figures 1 to 6 Shown: A rock and soil retaining equipment for foundation pit construction, including an outer protection component, an inner protection component, a fixing component, and a connecting component.

[0034] The outer protection component is arranged at the ground 610 at the upper periphery of the foundation pit 600 and is located outside the foundation pit 600; the outer protection component includes four outer base columns 100; the connections between the four outer base columns 100 are distributed in a matrix; the outer base columns 100 are arranged vertically, and the lower ends are in contact with the ground 610; an outer folding fence component is connected between two adjacent outer base columns 100; the four outer base columns 100 and the outer folding fence component enclose a rectangular outer fence. The outer folding fence component includes outer fence columns 110 and outer mating plates 111; there are multiple outer fence columns 110, and they are arranged vertically; the multiple outer fence columns 110 are distributed along the connection between two adjacent outer base columns 100; outer hinge columns are fixed on the outer fence columns 110; two outer baffle plates 120 distributed in an X shape are arranged at the outer hinge columns; the intersection of the two outer baffle plates 120 is hinged on the outer hinge column; the outer baffle plates 120 between two adjacent outer fence columns 110 are hinged into a rhombus; there are two outer mating plates 111; the outer mating plates 111 are distributed vertically and are in a V shape with the opening facing the outer fence column 110 close to the outer base column 100; the two outer mating plates 111 are hinged at the intersection and are hinged on the outer base column 100; the outer mating plates 111 and the outer baffle plates 120 are hinged into a rhombus.

[0035] The inner protection component is arranged inside the outer protection component and is located at the inner wall of the foundation pit 600; the inner protection component includes four inner base columns 200; the connections between the four inner base columns 200 are distributed in a matrix; the inner base columns 200 are arranged vertically; the lower ends of the inner base columns 200 are lower than the lower ends of the outer base columns 100 and extend into the foundation pit 600; an inner folding fence component is connected between two adjacent inner base columns 200; the four inner base columns 200 and the inner folding fence component enclose a rectangular inner fence; the inner fence and the outer fence form a double-layer fence in a shape of a Chinese character "hui"; the inner folding fence component includes inner fence columns 210 and inner mating plates; there are multiple inner fence columns 210, and they are arranged vertically; the multiple inner fence columns 210 are distributed along the connection between two adjacent inner base columns 200; inner hinge columns are fixed on the inner fence columns 210; two inner baffle plates distributed in an X shape are arranged at the inner hinge columns; the intersection of the two inner baffle plates is hinged on the inner hinge column; the inner baffle plates between two adjacent inner fence columns 210 are hinged into a rhombus; there are two inner mating plates; the inner mating plates are distributed vertically and are in a V shape with the opening facing the inner fence column 210 close to the inner base column 200; the two inner mating plates are hinged at the intersection and are hinged on the inner base column 200; the inner mating plates and the inner baffle plates are hinged into a rhombus.

[0036] An adjustment assembly is provided between adjacent inner base columns 200 and outer base columns 100; the adjustment assembly is used to adjust the spacing between the inner fence and the outer fence. The adjustment assembly includes an adjustment rod 300; the adjustment rod 300 is arranged horizontally and arranged along the connecting line direction of the projection of the axis of the adjacent inner base columns 200 and the outer base column 100 on the horizontal plane; the adjustment rod 300 is a sleeve-type telescopic rod, one end of which is fixedly connected to the upper end of the outer base column 100, and the other end is fixedly connected to the upper end of the inner base column 200. A scale is provided on the adjustment rod 300. It is used to adjust the spacing between the four outer base columns 100 and the corresponding inner base columns 200 to the same size. In other embodiments, the adjustment rod 300 includes a sub-rod and a mother tube; one end of the sub-rod is fixed on the inner base column 200; one end of the mother tube is fixed on the outer base column 100; the sub-rod and the mother rod are slidably connected at one end; a threaded hole is provided on the mother tube; the threaded hole is a through hole; a top screw is connected to the thread in the threaded hole; the top screw and the sub-rod are in contact. After the distance between the inner base column 200 and the outer base column 100 is adjusted, the top screw is twisted to tighten the sub-rod and lock the length of the adjustment rod 300.

[0037] The fixing assembly is arranged at the lower end of the inner base column 200, and the fixing assembly is used to fix the inner base column 200 to the side wall of the foundation pit 600, so that the lower end of the inner base column 200 and the side wall of the foundation pit 600 are fitted, so as to prevent the rock and soil at the upper edge of the foundation pit 600 from falling into the foundation pit 600 through the inner folding fence assembly between adjacent inner base columns 200. The fixing assembly includes a plug plate 400; the plug plate 400 is arranged below the adjustment rod 300 along the axis direction of the adjustment rod 300; the plug plate 400 is arranged between the inner base column 200 and the outer base column 100, and is located below the outer base column 100; the end of the plug plate 400 close to the inner base column 200 is fixedly connected to the lower end of the inner base column 200, and the end close to the outer base column 100 is wedge-shaped with the small end facing the outer base column 100. The four inner base columns 200 are respectively corresponding to the four corners of the foundation pit 600, and the plug plate 400 is nailed into the side wall of the foundation pit 600, and the inner base column 200 is fixed on the side wall of the foundation pit 600. The plug plate 400 is provided with a plurality of plug holes 410; the plurality of plug holes 410 are evenly distributed along the axis direction of the adjustment rod 300 of the plug plate 400; the plug holes 410 are through holes with the axis vertically arranged; a clamping column 420 is arranged in the plug hole 410; the clamping column 420 is arranged along the axis direction of the adjustment rod 300, and the end close to the inner base column 200 is slidably installed in the hole wall of the plug hole 410; the end of the clamping column 420 away from the inner base column 200 is arc-shaped; a locking spring 430 is connected between the clamping column 420 and the hole wall of the plug hole 410.

[0038] The connecting assembly is arranged between adjacent inner base columns 200 and outer base columns 100; after the fixing assembly is used to fix the four inner base columns 200 on the side walls of the foundation pit 600, the connecting assembly is used to fix the inner base columns 200 and the outer base columns 100 to connect them so that the inner fence and the outer fence form a U-shaped double-layer fence; the inner fence prevents the rock and soil at the upper edge of the foundation pit 600 from falling into the foundation pit 600, and the outer fence prevents pedestrians on the ground 610 outside the foundation pit 600 from falling into the foundation pit 600. When the outer fence is subjected to a disturbance force away from the foundation pit 600 or the inner fence is subjected to a disturbance force close to the foundation pit 600, the connecting assembly enables the inner fence and the outer fence to limit and support each other. By setting up an outer folding fence assembly and an inner folding fence assembly, the entire device is easy to fold and transport, and is adapted to foundation pits 600 of different sizes. There is no need to measure the size of the foundation pit 600 during installation. It is only necessary to place the four inner base columns 200 at the four corners of the foundation pit 600, and fix the inner base columns 200 on the side walls of the foundation pit 600. The inner fence and the outer fence are locked through the connecting assembly so that the inner fence and the outer fence support each other in a limited position, making the entire enclosure device more stable and less likely to fall over. When dismantling, it is only necessary to release the lock between the inner fence and the outer fence, shrink the inner folding fence assembly and the outer folding fence assembly, so that the four inner base columns 200 are close to each other, and the four outer base columns 100 are close to each other, so as to reduce the volume of the entire device for easy transportation.

[0039] The connecting assembly includes a sliding hole, a fixing pin 500 and an unlocking structure; the sliding hole is a through hole provided on the outer base column 100; and the axis of the sliding hole is vertically provided. The fixing pin 500 is arranged up and down, with a striking plate fixed on the upper end and a pointed cone-shaped lower end; the fixing pin 500 is arranged in the sliding hole for sliding up and down; a matching hole is provided on the side wall of the lower end of the fixing pin 500, and the axis is arranged radially along the fixing pin 500; the matching hole opens toward the inner base column 200; during installation, and when the inner base column 200 is fitted and fixed on the side wall of the foundation pit 600, and according to the scale on the adjusting rod 300, the distance between the outer base column 100 and the corresponding inner base column 200 is adjusted, and the sliding hole is made to face the insertion hole 410, and then the striking plate is hammered downward to nail the fixing pin 500 downward into the rock and soil at the upper end of the foundation pit 600, and the fixing pin 500 is inserted into the insertion hole 410, and when the clamping column 420 is facing the matching hole, the locking spring 430 pushes the clamping column 420 into the matching hole, and the inner base column 200 and the outer base column 100 are fixedly connected as a whole through the fixing pin 500 and the clamping column 420. The striking plate is in the shape of a disk, and the lower end of the striking plate is in the shape of a cone with the small end facing downwards, so as to facilitate the insertion of a crowbar between the striking plate and the outer base column 100 when the fixing pin 500 is pulled out.

[0040] The unlocking structure is used to drive the clamping column 420 out of the matching hole when disassembly is required, pull the fixing pin 500 out of the insertion hole 410, and release the lock between the inner base column 200 and the outer base column 100; extend the adjustment rod 300, pull the plug plate 400 out of the side wall of the foundation pit 600, and then make the inner base column 200 and the outer base column 100 gather to the center of the enclosed rectangle to reduce the volume of the equipment and facilitate transportation. The unlocking structure includes an unlocking plate 440 and a pull rope 450; the unlocking plate 440 is fixed on the clamping column 420 and slidably installed on the inner wall of the insertion hole 410; one end of the pull rope 450 is fixed with a pull ring, and the other end is inserted into the inner base column 200, and after extending downward along the inner base column 200 to the plug plate 400, it turns at a right angle and extends along the plug plate 400; the pull rope 450 and the inner base column 200 are slidably matched, and the pull rope 450 and the plug plate 400 are slidably matched; the pull rope 450 and the unlocking plate 440 are fixedly connected. When unlocking is required, the pull ring is pulled upwards, so that the unlocking plate 440 drives the clamping column 420 away from the outer base column 100, and drives the clamping column 420 to disengage from the matching hole.

[0041] In combination with the above embodiments, the use principle and working process of the present invention are as follows: when installing, it is not necessary to measure the size of the foundation pit 600, and only the four inner base columns 200 need to be respectively aligned with the four corners of the foundation pit 600, and the lower end of the outer base column 100 is in contact with the ground 610. Then, the plug plate 400 is nailed into the side wall of the foundation pit 600 to fix the inner base column 200 on the side wall of the foundation pit 600, so that the inner fence is attached to the side wall of the foundation pit 600. After the inner base column 200 is fitted and fixed on the side wall of the foundation pit 600, and according to the scale on the adjusting rod 300, the distance between the outer base column 100 and the corresponding inner base column 200 is adjusted, and the sliding hole is opposite to the insertion hole 410, and then the striking plate is hammered downward to nail the fixing pin 500 downward into the rock and soil at the upper end of the foundation pit 600, and the fixing pin 500 is inserted into the insertion hole 410. When the clamping column 420 is opposite to the matching hole, the locking spring 430 pushes the clamping column 420 into the matching hole, and the inner base column 200 and the outer base column 100 are fixedly connected as a whole through the fixing pin 500 and the clamping column 420. The outer fence is fixed on the ground 610 outside the upper end of the foundation pit 600, and the inner fence is fixed on the side wall of the foundation pit 600, so that the inner fence and the outer fence form a U-shaped double-layer fence; the inner fence prevents the rock and soil at the upper edge of the foundation pit 600 from falling into the foundation pit 600, and the outer fence prevents pedestrians on the ground 610 outside the foundation pit 600 from falling into the foundation pit 600. When the outer fence is subjected to a disturbance force away from the foundation pit 600 or the inner fence is subjected to a disturbance force close to the foundation pit 600, the connecting assembly allows the inner fence and the outer fence to limit and support each other. The inner fence and the outer fence limit and support each other, so that the entire enclosure equipment is more stable and not easy to fall over.

[0042] During dismantling, pull the pull ring upwards so that the unlocking plate 440 drives the clamping column 420 away from the outer base column 100, drives the clamping column 420 out of the matching hole, pulls the fixing pin 500 out of the insertion hole 410, and releases the lock between the inner base column 200 and the outer base column 100; extend the adjusting rod 300, pull the plug plate 400 out of the side wall of the foundation pit 600, and then gather the inner base column 200 and the outer base column 100 to the center of the enclosed rectangle to reduce the size of the equipment for easy transportation.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A rock and soil retaining equipment for foundation pit construction, characterized in that: Comprising: An outer protection component, which is arranged on the ground at the upper periphery of the foundation pit and is located outside the foundation pit; the outer protection component includes four outer base columns; the connection lines between the four outer base columns are distributed in a matrix; the outer base columns are arranged vertically, and the lower ends are in contact with the ground; an outer folding fence component is connected between two adjacent outer base columns; the four outer base columns and the outer folding fence component enclose a rectangular outer fence, and the outer fence is used to prevent pedestrians on the ground outside the foundation pit from falling into the foundation pit; An inner protection component, which is arranged inside the outer protection component and is located at the inner wall of the foundation pit; the inner protection component includes four inner base columns; the four inner base columns respectively correspond to the four corners of the foundation pit, and the connection lines between the four inner base columns are distributed in a matrix; the inner base columns are arranged vertically; the lower ends of the inner base columns are lower than the lower ends of the outer base columns and extend into the foundation pit; an inner folding fence component is connected between two adjacent inner base columns; the four inner base columns and the inner folding fence component enclose a rectangular inner fence, and the inner fence is used to prevent the rock and soil at the upper edge of the foundation pit from falling into the foundation pit; the inner fence and the outer fence form a double-layer fence in a shape of a Chinese character 'hui'; an adjusting component is arranged between the adjacent inner base column and outer base column; the adjusting component is used to adjust the distance between the inner fence and the outer fence; the adjusting component includes an adjusting rod, and the adjusting rod is arranged horizontally; A fixing component, which is arranged at the lower end of the inner base column, and the fixing component is used to fix the inner base column on the side wall of the foundation pit so that the lower end of the inner base column is attached to the side wall of the foundation pit; the fixing component includes an insertion plate; the insertion plate is arranged below the adjusting rod along the axial direction of the adjusting rod; the insertion plate is arranged between the inner base column and the outer base column and is located below the outer base column; one end of the insertion plate close to the inner base column is fixedly connected to the lower end of the inner base column, and the end close to the outer base column is in a wedge shape with the small end facing the outer base column; a plurality of insertion holes are arranged on the insertion plate; the plurality of insertion holes are evenly distributed along the axial direction of the insertion plate; the insertion holes are through holes with the axes arranged vertically; a clamping column is arranged in the insertion hole; the clamping column is arranged along the axial direction of the adjusting rod, and one end close to the inner base column is slidably installed in the hole wall of the insertion hole; the end of the clamping column far from the inner base column is in an arc shape; a locking spring is connected between the clamping column and the hole wall of the insertion hole; A connecting component, which is arranged between the adjacent inner base column and outer base column; after the fixing component is used to fix the four inner base columns on the side wall of the foundation pit, the connecting component is used to fixedly connect the inner base column and the outer base column.

2. The rock and soil retaining equipment for foundation pit construction according to claim 1, characterized in that: The adjusting rod is arranged along the connection line direction of the projections of the axes of the adjacent inner base column and outer base column on the horizontal plane; the adjusting rod is a sleeve type telescopic rod, one end is fixedly connected to the upper end of the outer base column, and the other end is fixedly connected to the upper end of the inner base column.

3. The rock and soil retaining equipment for foundation pit construction according to claim 2, characterized in that: Scales are arranged on the adjusting rod.

4. The rock and soil retaining equipment for foundation pit construction according to claim 3, characterized in that: The connecting component includes a sliding hole, a fixing pin and an unlocking structure; the sliding hole is a through hole arranged on the outer base column; the axis of the sliding hole is arranged vertically; The fixing pin is arranged vertically, a striking plate is fixed at the upper end, and the lower end is in a tapered shape; the fixing pin is arranged in the sliding hole in a vertically sliding manner; a matching hole with the axis arranged along the radial direction of the fixing pin is arranged on the side wall of the lower end of the fixing pin; the opening of the matching hole faces the inner base column; during installation, the fixing pin is inserted into the insertion hole, and when the clamping column is opposite to the matching hole, the locking spring pushes the clamping column into the matching hole; The unlocking structure is used to drive the clamping column to脱离 the matching hole and pull out the fixing pin from the insertion hole when disassembly is required, so as to解除 the locking between the inner base column and the outer base column.

5. The rock and soil retaining equipment for foundation pit construction according to claim 4, characterized in that: The unlocking structure includes an unlocking plate and a pull rope; the unlocking plate is fixed on the card column and slidably installed on the inner wall of the socket; a pull ring is fixed at one end of the pull rope, and the other end is inserted into the inner base column, and after extending downward along the inner base column to the plug plate, it turns at a right angle and extends along the plug plate; the pull rope and the inner base column are slidably matched, and the pull rope and the plug plate are slidably matched; the pull rope and the unlocking plate are fixedly connected.

6. The rock and soil retaining equipment for foundation pit construction according to claim 5, characterized in that: The external folding fence assembly includes an outer railing column and an outer matching plate; there are multiple outer railing columns, which are vertically arranged; multiple outer railing columns are distributed along the line between two adjacent outer base columns; an outer hinged column is fixed on the outer railing column; two outer baffles distributed in an X shape are arranged at the outer hinged column; the intersection of the two outer baffles is hinged on the outer hinged column; the outer baffle between two adjacent outer railing columns is hinged in a diamond shape; there are two outer matching plates; the outer matching plates are distributed up and down, and are in a V shape with the opening facing the outer railing column close to the outer base column; the two outer matching plates are hinged at the intersection and hinged to the outer base column; the outer matching plates and the outer baffles are hinged in a diamond shape.

7. The rock and soil retaining equipment for foundation pit construction according to claim 6, characterized in that: The inner folding fence assembly includes inner fence posts and inner matching plates; there are multiple inner fence posts, which are vertically arranged; multiple inner fence posts are distributed along the line between two adjacent inner base posts; an inner hinged post is fixed on the inner fence post; two inner baffles distributed in an X shape are provided at the inner hinged post; the two inner baffles are hinged on the inner hinged post at the intersection; the inner baffle between two adjacent inner fence posts is hinged in a diamond shape; there are two inner matching plates; the inner matching plates are distributed up and down, and are in a V shape with the opening facing the inner fence post close to the inner base post; the two inner matching plates are hinged at the intersection and hinged on the inner base post; the inner matching plates and the inner baffles are hinged in a diamond shape.

8. The rock and soil retaining equipment for foundation pit construction according to claim 2, characterized in that: The adjusting rod comprises a sub-rod and a mother tube; one end of the sub-rod is fixed on the inner base column; one end of the mother tube is fixed on the outer base column; the sub-rod and the mother rod are slidingly connected at the ends close to each other; a threaded hole is provided on the mother tube; the threaded hole is a through hole; a top screw is connected to the inner thread of the threaded hole; and the top screw abuts against the sub-rod.

9. The rock and soil retaining equipment for foundation pit construction according to claim 4, characterized in that: The striking plate is disc-shaped; the lower end of the striking plate is cone-shaped with the small end facing downward.

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