Foundation pit supporting device

Abstract

The utility model relates to the technical field of foundation pit supporting, and discloses a foundation pit supporting device which comprises two I-shaped stand columns installed in a ground foundation pit and an I-shaped cross beam installed at the upper ends of the two I-shaped stand columns, fixing plates are fixedly connected to the bottom faces of the two sides of the I-shaped cross beam respectively, and moving cavities are formed in the two fixing plates respectively. Moving assemblies are connected to the inner walls of the two moving cavities, pressure assemblies are connected to the two ends of the two moving assemblies, protection assemblies are connected to the upper ends of the two moving assemblies, lifting plates are connected to the upper ends of the two protection assemblies, and telescopic assemblies are connected to the upper surfaces of the two fixing plates; the other ends of the two telescopic assemblies are connected with the bottom faces of the two lifting plates correspondingly. According to the foundation pit supporting device, when a worker needs to move to the other side of the ground foundation pit through the I-shaped cross beam, the protection assembly and the lifting plate can be automatically and rapidly lifted on the two sides of the I-shaped cross beam only by pressing the pressure assembly, and therefore safety can be improved when the worker passes.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit support technology, specifically a foundation pit support device. Background Technology

[0002] Excavation pit support is a crucial technique in construction engineering, primarily used to ensure the stability and safety of excavated pits. During the construction of underground structures (such as basements and subway stations), deep pits need to be excavated. Due to the limited natural stability of soil, especially in situations with high groundwater levels or poor soil quality, the pit sidewalls may collapse without appropriate support measures, posing a serious threat to construction workers and the surrounding environment.

[0003] When excavating long and narrow foundation pits, such as for tunnels or underground drainage pipes, support columns and beams are typically installed to ensure construction safety and efficiency. These beams, mostly made of I-beams, not only provide necessary support for the pit but also serve as passageways for workers to move between the sides of the pit, facilitating operations within the confined space. However, currently, these beams generally lack necessary safety measures, posing potential safety hazards for workers walking on them. Utility Model Content

[0004] In view of the shortcomings of the existing technology, this utility model provides a foundation pit support device that can add protection on both sides of the I-shaped crossbeam when workers walk on it.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a foundation pit support device, comprising two I-shaped columns installed in a ground foundation pit and an I-shaped crossbeam installed on the upper end of the two I-shaped columns. Fixed plates are fixedly connected to the bottom surfaces of both sides of the I-shaped crossbeam. Movable cavities are formed inside the two fixed plates. Movable components are connected to the inner walls of the two movable cavities. Pressure components are connected to both ends of the two movable components, and protective components are connected to the upper ends of the two movable components. Lifting plates are connected to the upper ends of the two protective components. Telescopic components are connected to the upper surfaces of the two fixed plates, and the other ends of the two telescopic components are respectively connected to the bottom surfaces of the two lifting plates.

[0006] Furthermore, both ends of the two fixed plates and the two lifting plates on adjacent sides are provided with sliding grooves, and the two sliding grooves on the fixed plates are connected to the moving cavity. The lower end of the protective component is located in the two sliding grooves of the fixed plate, and the upper end of the protective component is located in the two sliding grooves of the lifting plate.

[0007] Furthermore, the moving assembly includes a bidirectional lead screw and two moving blocks. Both moving blocks are located inside the moving cavity, and the outer walls of both moving blocks are slidably connected to the inner wall of the moving cavity. The bidirectional lead screw passes through the fixed plate, and the outer walls at both ends of the bidirectional lead screw are rotatably connected to the inner walls of the two ends of the fixed plate. The inner walls of both moving blocks are threadedly connected to the outer walls of the bidirectional lead screw. The two ends of the bidirectional lead screw passing through the fixed plate are respectively connected to two pressure components, and the two moving blocks are connected to the end of the protective component near the fixed plate.

[0008] Furthermore, the pressure assembly includes a gear and a rack plate. One side of the gear is fixedly connected to one end of the bidirectional lead screw that passes through the fixed plate. The lower end of the rack plate passes through the lifting plate and the fixed plate. The rack plate meshes with the gear, and the side wall of the rack plate is slidably connected to the inner wall of the passage between the lifting plate and the fixed plate.

[0009] Furthermore, U-shaped railings are simultaneously fixedly connected to the upper ends of the two rack plates located at the same end of the I-shaped beam.

[0010] Furthermore, several warning strips are fixedly connected to the inner wall of the U-shaped railing.

[0011] Furthermore, the protective assembly includes two diagonal rods and four support plates. The four support plates are rotatably connected to the two ends of the two diagonal rods respectively through four No. 1 rotating shafts. The two diagonal rods are arranged crosswise, and the intersection of the two diagonal rods is rotatably connected through a No. 2 rotating shaft. The ends of the four support plates away from the diagonal rods are slidably connected to four sliding grooves on the lifting plate and the fixed plate respectively. The two support plates located in the two sliding grooves of the fixed plate are also fixedly connected to two moving blocks respectively.

[0012] Furthermore, the telescopic assembly includes several multi-segment telescopic rods, one end of each multi-segment telescopic rod is fixedly connected to the upper surface of the fixed plate, and the other end of each multi-segment telescopic rod is fixedly connected to the bottom surface of the lifting plate.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] This type of foundation pit support device uses fixed plates on both sides of an I-shaped crossbeam above the foundation pit on the ground. The fixed plates connect a moving component, a pressure component, a protective component, a telescopic component, and a lifting plate. When a worker needs to move across the I-shaped crossbeam to the other side of the foundation pit, simply pressing the pressure component will automatically and quickly raise the protective component and the lifting plate on both sides of the I-shaped crossbeam, thereby increasing safety when workers pass through. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall appearance of the present utility model;

[0016] Figure 2 This utility model Figure 1A schematic diagram of the overall appearance after the ground pit has been removed;

[0017] Figure 3 This utility model Figure 2 A schematic diagram of the overall appearance after removing the I-shaped columns and I-shaped beams;

[0018] Figure 4 This is a detailed connection diagram of the lifting plate, fixing plate, and pressure assembly components of this utility model;

[0019] Figure 5 This utility model Figure 4 Enlarged view of point A in the middle;

[0020] Figure 6 This utility model Figure 4 Enlarged diagram of point B in the middle.

[0021] In the diagram: 1. Ground pit; 2. I-shaped column; 3. I-shaped beam; 4. U-shaped railing; 5. Warning strip; 6. Rack plate; 7. Lifting plate; 8. Fixed plate; 9. Gear; 10. Multi-section telescopic rod; 11. Diagonal bar; 12. Slide groove; 13. Support plate; 14. Two-way screw rod; 15. Moving cavity; 16. Moving block. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figures 1-6A foundation pit support device includes two I-shaped columns 2 installed in a ground foundation pit 1 and an I-shaped crossbeam 3 installed on the upper end of the two I-shaped columns 2. The I-shaped columns 2 and I-shaped crossbeam 3 are mature technologies for existing ground foundation pit 1 support, and will not be described in detail here. Fixing plates 8 are fixedly connected to the bottom surfaces on both sides of the I-shaped crossbeam 3. The fixing plates 8 increase the stability and support of the entire subsequent protective structure. The fixing plates 8 and the I-shaped crossbeam 3 can be connected by bolts or direct welding, which is not limited here. Each of the two fixing plates 8 has a movable cavity 15 inside. Movable components are connected to the inner walls of each of the two movable cavities 15. Pressure components are connected to both ends of each of the two movable components, and pressure components are connected to the upper ends of each of the two movable components. The protective components are equipped with lifting plates 7 at their upper ends. By setting up moving and pressure components, when workers need to pass through the I-beam 3 to move to the other side of the ground pit 1, they can press down on the pressure component to rotate the moving component. This rotation of the moving component will then lift the protective components located in the moving cavity 15, thereby raising the guardrails on both sides of the I-beam 3 and increasing the safety of workers when passing through. The upper surfaces of the two fixed plates 8 are connected to telescopic components, and the other ends of the two telescopic components are connected to the bottom surfaces of the two lifting plates 7 respectively. By setting up the telescopic components, the lifting trajectory of the protective components can be restricted, so that the protective components can only rise and fall and will not tilt.

[0024] In a preferred embodiment of this invention, grooves 12 are provided at both ends of the two fixed plates 8 and the two lifting plates 7 on adjacent sides. The two grooves 12 on the fixed plates 8 are connected to the moving cavity 15. The lower end of the protective component is located within the two grooves 12 on the fixed plates 8, and the upper end of the protective component is located within the two grooves 12 on the lifting plates 7. By providing the grooves 12, the positional changes of the moving component can be accurately transmitted to the outside of the fixed plates 8, thereby controlling the stable lifting and lowering of the protective component without tilting or falling. Additionally, it provides support and storage for the protective component.

[0025] In a preferred embodiment of this invention, the moving assembly includes a bidirectional lead screw 14 and two moving blocks 16. Both moving blocks 16 are located within the moving cavity 15, and their outer walls are slidably connected to the inner wall of the moving cavity 15. The bidirectional lead screw 14 passes through the fixed plate 8, and its outer walls at both ends are rotatably connected to the inner walls of the points through which it passes through the fixed plate 8. The inner walls of the two moving blocks 16 are threadedly connected to the outer walls of the bidirectional lead screw 14. The two ends of the bidirectional lead screw 14 passing through the fixed plate 8 are respectively connected to two pressure components. The two moving blocks 16 are connected to the end of the protective component closest to the fixed plate 8. When the pressure components rotate, the bidirectional lead screw 14 rotates, causing the two moving blocks 16 to move within the moving cavity 15. This allows the protective component to move via the moving blocks 16, achieving the lifting and lowering of the protective component.

[0026] In a preferred embodiment of this invention, the pressure assembly includes a gear 9 and a rack plate 6. One side of the gear 9 is fixedly connected to one end of the bidirectional lead screw 14 that passes through the fixed plate 8. The lower end of the rack plate 6 passes through the lifting plate 7 and the fixed plate 8, and the rack plate 6 meshes with the gear 9. The side wall of the rack plate 6 is slidably connected to the inner wall of the passage between the lifting plate 7 and the fixed plate 8. When a worker needs to walk on the I-beam 3, they only need to press the rack plate 6 at the end of the I-beam 3, which will cause the gear 9 to rotate, thereby controlling the rotation of the bidirectional lead screw 14 and raising the protective assembly and the lifting plate 7.

[0027] In a preferred embodiment of this utility model, two rack plates 6 located at the same end of the I-shaped beam 3 are simultaneously fixedly connected to the upper ends of U-shaped railings 4. Several warning strips 5 are fixedly connected to the inner side wall of the U-shaped railings 4. By setting up the U-shaped railing 4, workers can more easily apply force when they need to press the rack plate 6. Pressing the U-shaped railing 4 can also lower the two rack plates 6 at the same end of the I-beam 3 together, reducing the time spent operating them separately and improving passage efficiency. In addition, by setting up the warning strip 5, after workers pass through the I-beam 3 and move to the other side of the ground pit 1, they can pull up the U-shaped railing 4 again, causing the protective components and lifting plate 7 to retract. At this time, the U-shaped railing 4 and the warning strip 5 can serve as a warning to prevent workers from falling due to lack of attention. At the same time, because of the effect of the U-shaped railing 4 and the warning strip 5, workers must press down the U-shaped railing 4 when they need to walk on the I-beam 3, which can forcibly raise the protective components and lifting plate 7, thus preventing some workers from not raising the protective components and lifting plate 7 to save trouble.

[0028] In a preferred embodiment of this invention, the protective assembly includes two diagonal rods 11 and four support plates 13. The four support plates 13 are rotatably connected to the two ends of the two diagonal rods 11 via four No. 1 rotating shafts. The two diagonal rods 11 are arranged crosswise, and the intersection point of the two diagonal rods 11 is rotatably connected via a No. 2 rotating shaft. The ends of the four support plates 13 away from the diagonal rods 11 are slidably connected to four sliding grooves 12 on the lifting plate 7 and the fixed plate 8, respectively. The two support plates 13 located in the two sliding grooves 12 of the fixed plate 8 are also fixedly connected to two moving blocks 16. The length of the diagonal rods 11 is fixed. Therefore, as the support plates 13 gradually move closer under the restriction of the moving blocks 16, the included angle between the two diagonal rods 11 is forced to decrease, thereby increasing the height of the lifting plate 7.

[0029] As a preferred embodiment of this utility model, the telescopic assembly includes several multi-segment telescopic rods 10. One end of each multi-segment telescopic rod 10 is fixedly connected to the upper surface of the fixed plate 8, and the other end of each multi-segment telescopic rod 10 is fixedly connected to the bottom surface of the lifting plate 7. By setting the multi-segment telescopic rods 10, firstly, the lifting plate 7 can be restricted to vertical movement only and cannot tilt, thus ensuring that the lifting plate 7 is positioned precisely on both sides of the I-beam 3; secondly, the multi-segment design of the multi-segment telescopic rods 10 can reduce the overall length of the retracted multi-segment telescopic rods 10.

[0030] Working principle:

[0031] like Figures 1 to 6 As shown, when using the foundation pit support device of this utility model, firstly, concrete mortar is poured into the side wall of the foundation pit 1 on the ground or support side plates are built (these are existing technologies). Then, several I-shaped columns 2 are installed on both sides of the bottom surface of the foundation pit 1, and I-shaped crossbeams 3 are installed on the upper end of the several I-shaped columns 2. At this point, the support structure is completed above the foundation pit 1. At this time, workers can move through the surface of the I-shaped crossbeams 3, and thus move back and forth on both sides of the ground of the foundation pit 1.

[0032] To ensure worker safety during movement, when a worker moves to the end of the I-shaped beam 3 (i.e., one side of the ground pit 1), the worker presses down on the U-shaped railing 4. The downward pressure on the U-shaped railing 4 causes the two rack plates 6 connected at both ends to descend together. The descent of the two rack plates 6 controls the rotation of the two gears 9. Subsequently, the gears 9 drive the bidirectional lead screw 14 to rotate, which in turn causes the two moving blocks 16 on the surface to move towards the center of the moving cavity 15. The movement of the moving blocks 16 causes the two support plates 13 connected to them to gradually move closer, thereby allowing the two diagonal bars 11 to rotate around the second pivot at the intersection. During the rotation, the lifting plates 7 at the upper ends of the two diagonal bars 11 are raised. Because of the multiple multi-segment telescopic rods 10, the lifting plates 7 remain vertically upward without tilting. Thus, although the I-shaped beam 3 is very narrow, the lifting plates 7 on both sides provide protection when workers walk on it, increasing overall safety.

[0033] After a worker passes through the I-beam 3, in order to ensure the safe passage of other workers, the worker can turn around and pull up the U-shaped railing 4 located at the other end of the I-beam 3 to protect both ends of the I-beam 3 again (because the two ends of the double-acting screw 14 are connected to the two gears 9, the two sides are actually raised or lowered synchronously), so that the lifting plate 7 can be raised for safety protection when the next worker walks.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A foundation pit support device comprising two H-shaped upright columns (2) installed in a ground foundation pit (1) and an H-shaped cross beam (3) installed at the upper ends of the two H-shaped upright columns (2), characterized in that: The bottom surfaces of both sides of the I-beam (3) are fixedly connected to fixed plates (8). The interior of each of the two fixed plates (8) is provided with a movable cavity (15). The inner walls of each of the two movable cavities (15) are connected to movable components. Both ends of each of the two movable components are connected to pressure components. The upper ends of each of the two movable components are connected to protective components. The upper ends of each of the two protective components are connected to lifting plates (7). The upper surfaces of each of the two fixed plates (8) are connected to telescopic components. The other ends of each of the two telescopic components are respectively connected to the bottom surfaces of the two lifting plates (7).

2. A foundation pit support device according to claim 1, characterized in that: The two fixed plates (8) and the two lifting plates (7) are provided with sliding grooves (12) at both ends of adjacent sides, and the two sliding grooves (12) on the fixed plate (8) are connected to the moving cavity (15). The lower end of the protective component is located in the two sliding grooves (12) of the fixed plate (8), and the upper end of the protective component is located in the two sliding grooves (12) of the lifting plate (7).

3. A foundation pit support device according to claim 2, characterized in that: The moving assembly includes a bidirectional lead screw (14) and two moving blocks (16). Both moving blocks (16) are located inside the moving cavity (15), and the outer walls of both moving blocks (16) are slidably connected to the inner wall of the moving cavity (15). The bidirectional lead screw (14) passes through the fixed plate (8), and the outer walls at both ends of the bidirectional lead screw (14) are rotatably connected to the inner walls at the two ends of the fixed plate (8). The inner walls of both moving blocks (16) are threadedly connected to the outer walls of the bidirectional lead screw (14). The two ends of the bidirectional lead screw (14) passing through the fixed plate (8) are respectively connected to two pressure components. The two moving blocks (16) are connected to the end of the protective component near the fixed plate (8).

4. A foundation pit support device according to claim 3, characterized in that: The pressure assembly includes a gear (9) and a rack plate (6). One side of the gear (9) is fixedly connected to one end of the bidirectional lead screw (14) that passes through the fixed plate (8). The lower end of the rack plate (6) passes through the lifting plate (7) and the fixed plate (8). The rack plate (6) meshes with the gear (9). The side wall of the rack plate (6) is slidably connected to the inner wall of the passage between the lifting plate (7) and the fixed plate (8).

5. A foundation pit support device according to claim 4, wherein: U-shaped railings (4) are fixedly connected to the upper ends of the two rack plates (6) located at the same end of the I-shaped crossbeam (3).

6. A foundation pit support device according to claim 5, wherein: Several warning strips (5) are fixedly connected to the inner wall of the U-shaped railing (4).

7. A foundation pit support device according to claim 6, wherein: The protective assembly includes two diagonal rods (11) and four support plates (13). The four support plates (13) are rotatably connected to the two ends of the two diagonal rods (11) respectively through four No. 1 rotating shafts. The two diagonal rods (11) are arranged crosswise, and the intersection of the two diagonal rods (11) is rotatably connected through a No. 2 rotating shaft. The end of the four support plates (13) away from the diagonal rods (11) is slidably connected to four sliding grooves (12) on the lifting plate (7) and the fixed plate (8) respectively. The two support plates (13) located in the two sliding grooves (12) of the fixed plate (8) are also fixedly connected to two moving blocks (16) respectively.

8. A foundation pit support device according to claim 7, characterized in that: The telescopic assembly comprises a plurality of multi-section telescopic rods (10), one end of each of the plurality of multi-section telescopic rods (10) is fixedly connected with the upper surface of the fixed plate (8), and the other end of each of the plurality of multi-section telescopic rods (10) is fixedly connected with the bottom surface of the lifting plate (7).

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