Earth excavation foundation pit protection device

Abstract

The utility model relates to the field of foundation pit protection devices, and discloses an earth excavation foundation pit protection device which comprises a bearing plate, a supporting barrel is fixed to the top face of the bearing plate, two limiting holes are formed in the outer wall of the supporting barrel, an air cylinder is fixed to the inner wall of the supporting barrel, and the bottom end of the air cylinder is fixed to the top face of the bearing plate. Two connecting blocks are fixed to one end of a telescopic rod of the air cylinder, the connecting blocks and the limiting holes are arranged in a sliding mode, a sliding frame is arranged on the outer wall of the supporting cylinder in a sliding mode, the connecting blocks are fixed to the inner wall of the sliding frame, and first movable hinges are fixed to the left side and the right side of the sliding frame correspondingly. According to the device, the sliding frame and the telescopic column can be driven by the air cylinder to move up and down, so that a worker can adjust the distance between the two barrier plates according to the width of a foundation pit, the barrier plates can stably support and protect the foundation pit, and the phenomenon that the barrier plates fall off due to uneven stress is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of foundation pit protection devices, in particular to an earthwork excavation foundation pit protection device. Background Art

[0002] Earth excavation is a prerequisite for civil engineering construction. The excavated foundation pit is an earth pit excavated at the foundation design location according to the base elevation and foundation plane dimensions. The excavation of a deeper foundation pit is prone to cause deformation of the surrounding soil. In order to avoid this situation, a protection system will be added during deep foundation design and pit construction to stabilize the safety of the foundation pit.

[0003] According to the Chinese patent with publication number: CN220550571U, a construction excavation pit protection device belongs to the field of foundation pit protection technology, including horizontal retaining plates, each layer of horizontal retaining plates is provided with multiple pieces along the front and rear directions, the inner side of the horizontal retaining plates is provided with column plates, an adjustable supporting structure is provided between two matching column plates, the front and rear ends of the horizontal retaining plates are respectively provided with dovetail-shaped connecting protrusions and connecting grooves, a plurality of sliding sleeves are sleeved on the column plates, locking bolts are provided on the sliding sleeves, and a supporting support plate is fixed on the top of the sliding sleeves.

[0004] In the above scheme, through the coordination of horizontal retaining plates, sleeve rods and telescopic rods, multiple horizontal retaining plates on the same layer can be integrated into a whole, with stronger protection capabilities. However, it still has the following disadvantages: the force-bearing capacity of this protective device is limited. When the bearing capacity of the soil around the foundation pit is insufficient, the protective device will fall off, causing the foundation pit to become unstable or collapse, thereby reducing the effectiveness of the protective device. Utility Model Content

[0005] The utility model aims to provide a protective device for an earthwork excavation foundation pit to solve the problem that the force bearing capacity of the protective device is limited. When the bearing capacity of the soil around the foundation pit is insufficient, the protective device will fall off, thereby causing the foundation pit to become unstable or collapse.

[0006] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical scheme: a protective device for earth excavation pit, including a load-bearing plate, a support tube is fixed to the top surface of the load-bearing plate, and two limit holes are provided on the outer wall of the support tube, a cylinder is fixed to the inner wall of the support tube, and the bottom end of the cylinder is fixed to the top surface of the load-bearing plate, and one end of the telescopic rod of the cylinder is fixed with two connecting blocks, and the connecting blocks are slidably arranged with the limit holes, and a sliding frame is slidably arranged on the outer wall of the support tube, and the connecting blocks are fixed to the inner wall of the sliding frame, and first movable hinges are fixed on both sides of the left and right sides of the sliding frame, a telescopic column is fixed on one side of the first movable hinge, and a second movable hinge is fixed on the other end of the telescopic column, and a blocking plate is fixed on one side of the second movable hinge, and L-shaped plates are provided on both sides of the left and right sides of the load-bearing plate.

[0007] Preferably, connecting plates are fixed on the left and right sides of the load-bearing plate, and sliding grooves are provided on both sides of the two L-shaped plates close to each other. The connecting plates and the sliding grooves are slidably arranged, and two threaded holes are provided on the inner bottom surface of the L-shaped plate. The threaded holes are connected to the sliding grooves, and the inner walls of the threaded holes are threadedly connected to limiting bolts, and the connecting plates are fixed in the sliding grooves by limiting bolts.

[0008] Preferably, both sides of the two blocking plates close to each other are provided with engaging grooves, and a engaging block is fixed on the top surface of the L-shaped plate, and the engaging block is engaged with the engaging groove.

[0009] Preferably, a mounting frame is fixed to the top surface of the blocking plate, and a protective net is fixed to the inner wall of the mounting frame.

[0010] Preferably, a plurality of fixed cones are fixed to the other side of the blocking plate.

[0011] Preferably, two through holes are provided on the top surface of the load-bearing plate, and fixing pins are slidably inserted into the inner walls of the through holes.

[0012] Compared with the prior art, the earthwork excavation pit protection device using the above technical solution has the following beneficial effects:

[0013] 1. The cylinder can drive the sliding frame and telescopic column to move up and down, so that the staff can adjust the distance between the two blocking plates according to the width of the foundation pit, so that the blocking plates can stably support and protect the foundation pit, preventing the blocking plates from falling off due to uneven force, thereby improving the use effect of the protective device. The L-shaped plate can be fixed by the limit bolt, so that the staff can adjust the position of the L-shaped plate, thereby assisting the protective device to stably protect the foundation pit, thereby improving the flexibility of the protective device;

[0014] Second, the L-shaped plate and the blocking plate can be connected by the clamping block. When the telescopic column is unfolded, the staff can clamp the clamping block into the clamping groove to make the L-shaped plate and the blocking plate in the same plane, so that the L-shaped plate can support the soil at the bottom of the foundation pit, thereby improving the protection efficiency of the protective device. The soil around the foundation pit can be protected by the protective net to prevent the soil from being squeezed by external forces and rolling into the foundation pit, thereby improving the safety of the staff's work;

[0015] 3. The contact force of the barrier plate with the foundation pit can be increased by the fixing cone, so that when the protective device is working, the fixing cone can be inserted into the soil around the foundation pit, thereby preventing the barrier plate from slipping. The bearing plate can be fixed to the inner bottom surface of the foundation pit by the fixing pin, so that the protective device on the bearing plate can stably protect the surrounding of the foundation pit, thereby improving the working efficiency of the protective device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional schematic diagram of an embodiment.

[0017] Figure 2 It is an exploded perspective schematic diagram of an embodiment.

[0018] Figure 3 It is an exploded stereoscopic schematic diagram of the blocking plate and the clamping block in the embodiment.

[0019] Figure 4 For example Figure 2 Enlarged schematic diagram at point A in the middle.

[0020] In the figure: 1. load-bearing plate; 2. support tube; 3. limit hole; 4. cylinder; 5. connecting block; 6. sliding frame; 7. first movable hinge; 8. telescopic column; 9. second movable hinge; 10. blocking plate; 11. L-shaped plate; 12. connecting plate; 13. slide groove; 14. threaded hole; 15. limit bolt; 16. snap-in groove; 17. snap-in block; 18. mounting frame; 19. fixing cone; 20. through hole; 21. fixing pin; 22. protective net. DETAILED DESCRIPTION

[0021] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0022] like Figure 1-Figure 4 As shown, a protective device for earthwork excavation foundation pit comprises a load-bearing plate 1, a support tube 2 is fixed to the top surface of the load-bearing plate 1, two limit holes 3 are provided on the outer wall of the support tube 2, a cylinder 4 is fixed to the inner wall of the support tube 2, the bottom end of the cylinder 4 is fixed to the top surface of the load-bearing plate 1, two connecting blocks 5 are fixed to one end of the telescopic rod of the cylinder 4, the connecting blocks 5 are slidably arranged with the limit holes 3, a sliding frame 6 is slidably arranged on the outer wall of the support tube 2, the connecting blocks 5 are fixed to the inner wall of the sliding frame 6, a first movable hinge 7 is fixed to the left and right sides of the sliding frame 6, a telescopic column 8 is fixed to one side of the first movable hinge 7, a second movable hinge 9 is fixed to the other end of the telescopic column 8, a blocking plate 10 is fixed to one side of the second movable hinge 9, and an L-shaped plate 11 is arranged on the left and right sides of the load-bearing plate 1.

[0023] During use, the cylinder 4 can drive the sliding frame 6 and the telescopic column 8 to move up and down, so that the staff can adjust the distance between the two blocking plates 10 according to the width of the foundation pit, so that the blocking plates 10 can stably support and protect the foundation pit, preventing the blocking plates 10 from falling off due to uneven force, thereby improving the use effect of the protective device.

[0024] like Figure 1-Figure 4As shown, connecting plates 12 are fixed on the left and right sides of the load-bearing plate 1, and sliding grooves 13 are provided on both sides of the two L-shaped plates 11 close to each other. The connecting plate 12 and the sliding groove 13 are slidably arranged, and two threaded holes 14 are provided on the inner bottom surface of the L-shaped plate 11. The threaded holes 14 are connected to the sliding groove 13, and the inner walls of the threaded holes 14 are threadedly connected with limiting bolts 15. The connecting plate 12 is fixed in the sliding groove 13 by the limiting bolts 15, and the two blocking plates 10 are provided with clamping grooves 16 on both sides of the two blocking plates 10 close to each other. A clamping block 17 is fixed on the top surface of the L-shaped plate 11, and the clamping block 17 is clamped with the clamping groove 16.

[0025] During use, the L-shaped plate 11 can be fixed by the limiting bolts 15, so that the staff can adjust the position of the L-shaped plate 11, thereby assisting the protective device to stably protect the foundation pit, thereby improving the flexibility of the protective device. The L-shaped plate 11 can be clamped with the blocking plate 10 by the clamping block 17. When the telescopic column 8 is unfolded, the staff can clamp the clamping block 17 in the clamping groove 16, so that the L-shaped plate 11 and the blocking plate 10 are in the same plane, so that the L-shaped plate 11 can support the soil at the bottom of the foundation pit, thereby improving the protection efficiency of the protective device.

[0026] like Figure 1-Figure 3 As shown, a mounting frame 18 is fixed to the top surface of the blocking plate 10 , a protective net 22 is fixed to the inner wall of the mounting frame 18 , and a plurality of fixing cones 19 are fixed to the other side of the blocking plate 10 .

[0027] During use, the protective net 22 can protect the soil around the foundation pit, preventing the soil from rolling into the foundation pit due to external force, thereby improving the safety of the workers. The fixed cone 19 can increase the contact force of the blocking plate 10 with the foundation pit, so that when the protective device is working, the fixed cone 19 can be inserted into the soil around the foundation pit, thereby preventing the blocking plate 10 from sliding off.

[0028] like Figure 1 and Figure 2 As shown, two through holes 20 are provided on the top surface of the load-bearing plate 1, and fixing pins 21 are slidably inserted into the inner walls of the through holes 20.

[0029] During use, the load-bearing plate 1 can be fixed to the inner bottom surface of the foundation pit by the fixing pins 21, so that the protective device on the load-bearing plate 1 can stably protect the surroundings of the foundation pit, thereby improving the working efficiency of the protective device.

[0030] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A protective device for an earthwork excavation pit, comprising a bearing plate (1), characterized in that: A support tube (2) is fixed on the top surface of the load-bearing plate (1), and two limiting holes (3) are provided on the outer wall of the support tube (2). A cylinder (4) is fixed on the inner wall of the support tube (2), and the bottom end of the cylinder (4) is fixed to the top surface of the load-bearing plate (1). Two connecting blocks (5) are fixed to one end of the telescopic rod of the cylinder (4), and the connecting blocks (5) are slidably arranged with the limiting holes (3). A sliding frame (6) is slidably arranged on the outer wall of the support tube (2), and the connecting blocks (5) are fixed to the inner wall of the sliding frame (6). First movable hinges (7) are fixed on both sides of the sliding frame (6), and a telescopic column (8) is fixed on one side of the first movable hinge (7). A second movable hinge (9) is fixed on the other end of the telescopic column (8), and a blocking plate (10) is fixed on one side of the second movable hinge (9). L-shaped plates (11) are provided on both sides of the load-bearing plate (1).

2. The earthwork excavation pit protection device according to claim 1, characterized in that: A connecting plate (12) is fixed on both the left and right sides of the load-bearing plate (1), and a sliding groove (13) is provided on both sides of the two L-shaped plates (11) close to each other. The connecting plate (12) and the sliding groove (13) are slidably arranged. Two threaded holes (14) are provided on the inner bottom surface of the L-shaped plate (11), and the threaded holes (14) are connected to the sliding groove (13). The inner wall of the threaded hole (14) is threadedly connected to a limiting bolt (15), and the connecting plate (12) is fixed in the sliding groove (13) by the limiting bolt (15).

3. The earthwork excavation pit protection device according to claim 2 is characterized in that: Both sides of the two blocking plates (10) close to each other are provided with a clamping groove (16), and a clamping block (17) is fixed on the top surface of the L-shaped plate (11), and the clamping block (17) is clamped with the clamping groove (16).

4. The earthwork excavation pit protection device according to claim 3 is characterized in that: A mounting frame (18) is fixed on the top surface of the blocking plate (10), and a protective net (22) is fixed on the inner wall of the mounting frame (18).

5. The earthwork excavation pit protection device according to claim 4 is characterized in that: A plurality of fixed cones (19) are fixed to the other side of the blocking plate (10).

6. The earthwork excavation pit protection device according to claim 1, characterized in that: Two through holes (20) are provided on the top surface of the load-bearing plate (1), and fixing pins (21) are slidably inserted into the inner walls of the through holes (20).

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