A composite steel support structure for foundation pit protection using a construction method.

Abstract

This utility model discloses a composite steel support structure for foundation pit protection using pile-type construction methods. It relates to the field of foundation pit protection and includes a supporting I-beam. A bottom support plate is installed at the end of the supporting I-beam, and a meshing transmission mechanism for retracting an integrated transmission rod is installed inside the bottom support plate. The meshing transmission mechanism includes a drive motor, which is fixedly installed inside the bottom support plate. When bottom support operations are required, this composite steel support structure for foundation pit protection allows the drive motor to be directly activated, driving the central transmission gear. This causes the meshing fixed racks on both sides to slide laterally in opposite directions, simultaneously driving the integrated transmission rod fixed on the side until it contacts the interior of the foundation pit to complete the support. This design makes the bottom support extension design very convenient to activate and provides a larger support area, resulting in better protection of the foundation pit's interior when the processing area is large.

Description

Technical Field

[0001] This utility model relates to the field of foundation pit protection technology, specifically a construction method pile combined steel support structure for foundation pit protection. Background Technology

[0002] Foundation pit support refers to the measures taken to support, reinforce, and protect the side walls and surrounding environment of the foundation pit in order to ensure the safety of underground structure construction and the surrounding environment. As the height of buildings continues to increase, the depth of foundation pits is also increasing, so the safety of foundation pits has attracted much attention.

[0003] Existing foundation pit support installation is often carried out only after the foundation pit has been excavated to a certain depth. During the excavation process, the soil in the foundation pit is exposed to the outside, and the exposed soil is at risk of collapse at any time. In addition, the existing technology requires the installation of foundation pit support in conjunction with groundwater detection equipment, and it is only installed when the excavation is close to the groundwater source. Although this method can install the foundation pit support, the connection between the two is relatively complicated, which affects the construction progress.

[0004] To overcome the aforementioned deficiencies, existing technology (Chinese patent publication number: CN111622232A, application date: 2020-09-04) discloses a foundation pit support and protection structure, including a drill rod. A pressure plate is movably connected to the upper end of the drill rod, and a drill bit is fixedly connected to the lower end. A rotating shaft is movably connected inside the drill rod, a connecting plate is movably connected to the surface of the rotating shaft, a reciprocating rod is movably connected to the surface of the connecting plate, and an airbag is movably connected to the end of the reciprocating rod away from the rotating shaft. A telescopic rod is movably connected to the surface of the rotating shaft and below the connecting plate, and a spring rod is movably connected to the end of the telescopic rod away from the rotating shaft. A groove is formed on the surface of the spring rod, a trigger spring is movably connected to the surface of the spring rod, and a piston block is movably connected to the surface of the trigger spring. The airbag generates suction force to draw water into the deflection plate. The installation of the foundation pit support is completed during the time the airbag draws water, thus achieving the effect of completing the foundation pit support installation before water discharge without the need for water source detection equipment.

[0005] While the above design can solve the aforementioned problems, the bottom support extension design of the equipment is relatively complex to start, and the support area is insufficient. When the processing area is large, the internal protection effect of the pit is weak, and it does not have a convenient and quick start-up effect. At the same time, when the equipment is dismantled, the inner wall of the pit may become loose due to the gradual retraction of the bottom support. Rapid dismantling may cause the pit to collapse around the perimeter, resulting in insufficient stability and safety in use. Utility Model Content

[0006] The purpose of this utility model is to provide a construction pile combined steel support structure for foundation pit protection, in order to solve the problems mentioned in the background art, such as the complex start-up of the bottom support extension design of the equipment, insufficient support area, weak internal protection effect of the foundation pit when the processing area is large, lack of convenient and rapid start-up effect, and the possibility of loosening of the inner wall of the foundation pit due to the gradual retraction of the bottom support during equipment dismantling. Rapid dismantling may cause the foundation pit to collapse around the perimeter, resulting in insufficient stability and safety.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a composite steel support structure for foundation pit protection, comprising a supporting I-beam, a bottom support plate installed at the end of the supporting I-beam, and a meshing transmission mechanism for retracting an integral transmission rod installed inside the bottom support plate, the meshing transmission mechanism comprising a drive motor, the drive motor being fixedly installed inside the bottom support plate, a central transmission gear being installed on the outer surface of the output end of the drive motor, and a first sliding frame being installed inside the bottom support plate, the supporting I-beam being fixedly installed inside a fixed connecting block, and an elastic sliding mechanism for retracting an upper support rod being installed on the outer surface of the fixed connecting block.

[0008] Furthermore, the elastic sliding mechanism includes a connecting rotating rod, which is rotatably mounted on the upper surface of the integrated transmission rod. A second sliding frame is installed on the side of the fixed connecting block, and a lifting rotating frame is installed inside the second sliding frame.

[0009] Furthermore, the top of the connecting rotating rod is rotatably installed inside the lifting rotating frame, and the lifting rotating frame slides up and down along the inside of the second sliding frame. A bottom support block is installed above the lifting rotating frame, and transverse sliding frames are installed on the left and right sides of the fixed connecting block. A shrinking cylinder is installed inside the transverse sliding frame, and the bottom support block abuts against the end of the shrinking cylinder.

[0010] Furthermore, a limiting sliding groove is formed on the upper surface of the first sliding frame, and a transmission extension plate is installed inside the first sliding frame. Lateral stabilizing blocks are installed at the upper left and right ends of the transmission extension plate, and the lateral stabilizing blocks slide along the inside of the limiting sliding groove.

[0011] Furthermore, a meshing and fixing rack is installed on the side of the transmission extension plate, and the meshing and fixing rack meshes with the central transmission gear. The transverse stabilizing block and the transmission extension plate are designed as an integral unit, and an integral transmission rod is installed on the side of the transmission extension plate.

[0012] Furthermore, the integrated transmission rod is slidably installed inside the bottom support plate, and a fixed connecting block is installed above the bottom support plate. The outer surface of the meshing fixed rack contacts the outer surface of the intermediate transmission gear to form a meshing structure, and the inner surface of the limiting sliding inner groove contacts the outer surface of the transverse stabilizing block to form a sliding structure.

[0013] Furthermore, an upper support rod is installed inside the shrinking cylinder, and a compression support spring is installed on the outer surface of the upper support rod, with the end of the compression support spring abutting against the outer surface of the shrinking cylinder.

[0014] Compared with the prior art, the beneficial effects of this utility model are: the combined steel support structure of the construction pile for foundation pit protection can directly start the drive motor to drive the central transmission gear when the equipment needs to be supported at the bottom. This causes the meshing and fixed racks on both sides to slide in the opposite direction laterally, while the integrated transmission rod fixed on the side is driven until it contacts the inside of the foundation pit to complete the support. This design makes the bottom support extension design very convenient to start, and the support area is larger. When the processing area is large, the protection effect on the inside of the foundation pit is better.

[0015] Furthermore, during the recovery and startup of the equipment bottom, the transmission gear reverses its movement, causing the integrated transmission rod to drive the connecting rotating rod inward. The connecting rotating rod then lifts the bottom support block through the lifting rotating frame until it contacts the retractable cylinder. The retractable cylinder slides laterally along the corresponding transverse sliding frame until the upper support rod contacts the inside of the pit. At the same time, the compression of the support spring ensures the stability of the installation. This design makes the inner wall of the pit more stable during the dismantling of the equipment, improving the stability and safety of use.

[0016] Furthermore, the two sets of meshing fixed racks are installed in opposite directions, and the rotation of the central transmission gear drives both ends synchronously to complete the internal support effect. At the same time, the force of the upper support rod squeezing the support spring will ensure that the inner wall of the pit will not collapse, thus ensuring the stability of the equipment dismantling effect. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the three-dimensional structure of the supporting I-beam of this utility model;

[0018] Figure 2 This is a three-dimensional structural diagram of the fixed connecting block of this utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of the transverse stabilizing block of this utility model;

[0020] Figure 4 This is a three-dimensional structural diagram of the transverse sliding frame of this utility model;

[0021] Figure 5 This is a three-dimensional structural diagram of the bottom support block of this utility model;

[0022] Figure 6 This is a schematic diagram of the three-dimensional structure of the meshing and fixing rack of this utility model.

[0023] In the diagram: 1. Supporting I-beam; 2. Fixed connecting block; 3. Bottom support plate; 4. First sliding frame; 5. Limiting sliding inner groove; 6. Lateral stabilizing block; 7. Transmission extension plate; 8. Meshing fixed rack; 9. Integrated transmission rod; 10. Drive motor; 11. Intermediate transmission gear; 12. Connecting rotating rod; 13. Second sliding frame; 14. Lifting rotating frame; 15. Bottom support block; 16. Lateral sliding frame; 17. Retractable cylinder; 18. Upper support rod; 19. Compression support spring. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example 1: Please refer to Figures 1-6 The present invention provides the following technical solution: a composite steel support structure for foundation pit protection, comprising a supporting I-beam 1, a bottom support plate 3 installed at the end of the supporting I-beam 1, and a meshing transmission mechanism for retracting an integral transmission rod 9 installed inside the bottom support plate 3. The meshing transmission mechanism includes a drive motor 10, which is fixedly installed inside the bottom support plate 3. A central transmission gear 11 is installed on the outer surface of the output end of the drive motor 10, and a first sliding frame 4 is installed inside the bottom support plate 3. The supporting I-beam 1 is fixedly installed inside a fixed connecting block 2, and an elastic sliding mechanism for retracting an upper support rod 18 is installed on the outer surface of the fixed connecting block 2.

[0026] like Figure 2 , Figure 3 , Figure 4The technical solution shown addresses the problems of complex start-up design for the bottom support extension of the equipment, insufficient support area, weak internal protection of the pit when the processing area is large, and lack of convenient and rapid start-up. It discloses the following: a limiting sliding groove 5 is formed on the upper surface of the first sliding frame 4, and a transmission extension plate 7 is installed inside the first sliding frame 4. Lateral stabilizing blocks 6 are installed at the upper left and right ends of the transmission extension plate 7, and the lateral stabilizing blocks 6 slide along the interior of the limiting sliding groove 5. A meshing and fixing rack 8 is installed on the side, and the meshing and fixing rack 8 meshes with the central transmission gear 11. The transverse stabilizing block 6 and the transmission extension plate 7 are integrated. An integrated transmission rod 9 is installed on the side of the transmission extension plate 7. The integrated transmission rod 9 is slidably installed inside the bottom support plate 3. A fixed connecting block 2 is installed above the bottom support plate 3. The outer surface of the meshing and fixing rack 8 contacts the outer surface of the central transmission gear 11 to form a meshing structure. The inner surface of the limiting sliding inner groove 5 contacts the outer surface of the transverse stabilizing block 6 to form a sliding structure.

[0027] When a stable installation of the entire device is required, the drive motor 10, which is fixedly installed inside the bottom support plate 3, is first started. The drive motor 10 drives the intermediate transmission gear 11, which is fixedly installed on the outer surface of the output end, to rotate continuously. When the intermediate transmission gear 11 rotates, it engages with the meshing fixed racks 8 on both sides and is driven by them. Since the two sets of meshing fixed racks 8 are installed in opposite directions, the meshing fixed racks 8 move laterally relative to each other. And since the meshing fixed racks 8 are fixedly installed above the transmission extension plate 7, the transmission extension plate 7 will slide stably in sync with the drive. When the extension plate 7 moves, the horizontal stabilizing blocks 6 fixedly installed on the upper left and right sides will also move synchronously. When the transmission extension plate 7 is driven to move, it will slide along the inside of the first sliding frame 4 fixedly installed at the corresponding position inside the bottom support plate 3. At the same time, the horizontal stabilizing blocks 6 will slide along the limiting sliding groove 5 opened at the corresponding position at the top of the first sliding frame 4. When the transmission extension plate 7 extends forward, the integrated transmission rod 9 fixedly installed on the side will also be driven synchronously to move laterally in a stable manner until it contacts the inner surface of the pit. This will obtain a larger contact area and increase the stability of use.

[0028] Example 2: Figure 2 , Figure 3 , Figure 4The technical solution shown addresses the issue that during equipment dismantling, the gradual retraction of the bottom support may cause the inner wall of the pit to loosen, potentially leading to collapse around the pit and insufficient stability and safety. The solution discloses an elastic sliding mechanism including a connecting rotating rod 12, rotatably mounted on the upper surface of an integrated transmission rod 9. A second sliding frame 13 is mounted on the side of the fixed connecting block 2, and a lifting rotating frame 14 is installed inside the second sliding frame 13. The top of the connecting rotating rod 12 is rotatably mounted on the lifting rotating frame. Inside the moving frame 14, the lifting and rotating frame 14 slides up and down along the inside of the second sliding frame 13. A bottom support block 15 is installed above the lifting and rotating frame 14, and a transverse sliding frame 16 is installed on the left and right sides of the fixed connecting block 2. A retractable cylinder 17 is installed inside the transverse sliding frame 16, and the bottom support block 15 abuts against the end of the retractable cylinder 17. An upper support rod 18 is installed inside the retractable cylinder 17, and a compression support spring 19 is installed on the outer surface of the upper support rod 18. The end of the compression support spring 19 abuts against the outer surface of the retractable cylinder 17.

[0029] When the equipment needs to be completely dismantled, the drive motor 10 drives the intermediate transmission gear 11 to reverse, causing the meshing fixed rack 8 to drive the transmission extension plate 7 back into the bottom support plate 3 to complete the retraction. Simultaneously, as the integrated transmission rod 9 retracts, the connecting rotating rod 12, rotatably connected to the upper surface of the integrated transmission rod 9, is also driven to fold. Due to the rotational connection of the connecting rotating rod 12, its top rises due to the inward movement of its bottom. At this time, the top of the connecting rotating rod 12 drives the lifting rotating frame 14 connected to its end to rise. The lifting rotating frame 14 slides vertically along the interior of the second sliding frame 13 fixed at the corresponding position on the outer surface of the fixed connecting block 2, thus achieving lifting and rotation. Because of its rotational connection with the connecting rotating rod 12, the frame 14 will continue to slide vertically. At the same time, the movement of the lifting rotating frame 14 will move the bottom support block 15 fixed at the top synchronously. The movement of the bottom support block 15 will abut against the retractable cylinder 17 and push it out. The retractable cylinder 17 slides laterally along the corresponding position of the horizontal sliding frame 16 fixed on the side of the fixed connecting block 2 until the upper support rod 18 nested inside the retractable cylinder 17 abuts against the inner surface of the pit. When the upper support rod 18 abuts against the inside of the pit, the abutting force will squeeze the upper support rod 18 inward. During the retraction process, the upper support rod 18 will squeeze the compression support spring 19 against the retractable cylinder 17 to achieve the support effect for the upper part of the equipment.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A composite steel support structure for foundation pit protection, comprising a supporting I-beam (1), wherein a bottom support plate (3) is installed at the end of the supporting I-beam (1), and a meshing transmission mechanism for retracting an integral transmission rod (9) is installed inside the bottom support plate (3). characterized in that The meshing transmission mechanism includes a drive motor (10), and the drive motor (10) is fixedly installed inside the bottom support plate (3). A central transmission gear (11) is installed on the outer surface of the output end of the drive motor (10), and a first sliding frame (4) is installed inside the bottom support plate (3). The support I-beam (1) is fixedly installed inside the fixed connecting block (2), and an elastic sliding mechanism for retracting the upper support rod (18) is installed on the outer surface of the fixed connecting block (2).

2. The composite steel support structure for foundation pit protection using construction piles as described in claim 1, characterized in that: The elastic sliding mechanism includes a connecting rotating rod (12), which is rotatably mounted on the upper surface of the integrated transmission rod (9). A second sliding frame (13) is installed on the side of the fixed connecting block (2), and a lifting rotating frame (14) is installed inside the second sliding frame (13).

3. The composite steel support structure for foundation pit protection using construction piles as described in claim 2, characterized in that: The top of the connecting rotating rod (12) is rotatably installed inside the lifting rotating frame (14), and the lifting rotating frame (14) slides up and down along the inside of the second sliding frame (13). A bottom support block (15) is installed above the lifting rotating frame (14), and a transverse sliding frame (16) is installed on the left and right sides of the fixed connecting block (2). A shrinking cylinder (17) is installed inside the transverse sliding frame (16), and the bottom support block (15) abuts against the end of the shrinking cylinder (17).

4. A composite steel support structure for foundation pit protection using construction piles as described in claim 1, characterized in that: The upper surface of the first sliding frame (4) is provided with a limiting sliding groove (5), and a transmission extension plate (7) is installed inside the first sliding frame (4). A transverse stabilizing block (6) is installed at the upper left and right ends of the transmission extension plate (7), and the transverse stabilizing block (6) slides along the inside of the limiting sliding groove (5).

5. A composite steel support structure for foundation pit protection using construction piles as described in claim 4, characterized in that: The transmission extension plate (7) has a meshing fixed rack (8) installed on its side, and the meshing fixed rack (8) meshes with the central transmission gear (11). The transverse stabilizing block (6) and the transmission extension plate (7) are designed as a single unit, and the transmission extension plate (7) has an integrated transmission rod (9) installed on its side.

6. A composite steel support structure for foundation pit protection using construction piles as described in claim 5, characterized in that: The integrated transmission rod (9) is slidably installed inside the bottom support plate (3), and a fixed connecting block (2) is installed above the bottom support plate (3). The outer surface of the meshing fixed rack (8) contacts the outer surface of the intermediate transmission gear (11) to form a meshing structure, and the inner surface of the limiting sliding inner groove (5) contacts the outer surface of the transverse stabilizing block (6) to form a sliding structure.

7. A composite steel support structure for foundation pit protection using construction piles as described in claim 3, characterized in that: The shrinking cylinder (17) has an upper support rod (18) installed inside, and a compression support spring (19) is installed on the outer surface of the upper support rod (18), and the end of the compression support spring (19) abuts against the outer surface of the shrinking cylinder (17).

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