A retaining pile post-extraction void filling device

Abstract

The utility model discloses a kind of gap filling devices after fender pile is pulled out, including grouting machine main body, the end portion of grouting machine main body is fixedly connected with grouting pipe, and the end portion of grouting pipe is fixedly connected with grouting rod, the grouting rod is fixedly connected with Larson steel sheet pile through multiple groups of limiting components, and the overall structure that can be clamped by Larson steel sheet pile driving and pulling equipment is formed;Through the cooperation between above each device, by grouting drill rod and a certain length of Larson steel sheet pile are fixed with multiple hoop connection, grouting device that can be clamped directly by Larson steel sheet pile driving and pulling equipment is formed, without additional drilling machine during construction, directly using on-site Larson steel sheet pile driving and pulling equipment can be operated, drilling machine and professional operator's investment are saved, manpower and equipment cost are greatly reduced.

Description

Technical Field

[0001] This utility model relates to the field of void treatment technology after the foundation pit support structure is pulled out, specifically a void filling device after the retaining pile is pulled out. Background Technology

[0002] During the construction of subway projects, when the subway line needs to pass under an existing bridge, since most bridges did not reserve space for subway construction during the construction phase, their pile foundations often conflict with the subway tunnel sections. Therefore, it is necessary to demolish and rebuild the bridge to remove the conflicting pile foundations. In the process of bridge demolition and reconstruction, the commonly used foundation pit support methods for demolishing old bridges and building new bridges are reusable structures such as steel sheet piles and PLC combined piles. However, after these support structures are pulled out after completing their mission, vertical voids will be formed in the soil at the pile locations. If the voids are not filled effectively in time, they are prone to soil stress imbalance under the subsequent shield tunneling construction or the action of surrounding environmental loads, leading to safety hazards such as grout leakage and tunnel face instability during shield tunneling. At the same time, it may also cause environmental problems such as ground subsidence and cracking of surrounding buildings, posing a serious threat to construction safety and the lives of surrounding residents. In the existing technology, there are significant limitations when using ordinary grouting equipment to fill such gaps: on the one hand, the working platform needs to be leveled twice before operation, especially in complex environments such as river channels and soft soil layers, where additional temporary working platforms such as cofferdams need to be built, which not only increases construction costs but also prolongs the construction period; on the other hand, ordinary grouting equipment relies on drilling rigs for auxiliary operation, and the drill rods need to be frequently disassembled and assembled, requiring a professional operating team, resulting in high labor and equipment costs, and low overall construction efficiency, making it difficult to meet the engineering requirements for strict deformation control.

[0003] Therefore, this utility model provides a device for filling the gap after the retaining pile is pulled out, so as to solve the above problems. Utility Model Content

[0004] This utility model provides a device for filling the gap after the retaining pile is pulled out, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a gap filling device after the retaining pile is pulled out, comprising a grouting machine body, a grouting pipe fixedly connected to the end of the grouting machine body, and a grouting rod fixedly connected to the end of the grouting pipe, the grouting rod being fixedly connected to the Larssen steel sheet pile through multiple sets of limiting components to form an integral structure that can be clamped by Larssen steel sheet pile driving and pulling equipment, the grouting pipe and the grouting rod being fixedly connected through a flange, and sealing components being provided on the grouting pipe and the grouting rod for protecting the flange.

[0006] As a preferred technical solution of this application, the multiple sets of limiting components include multiple sets of first connecting clamps fixedly installed on one side of the inner wall of the grouting machine body, and the multiple sets of first connecting clamps are fixedly connected to second connecting clamps by bolts and nuts.

[0007] As a preferred technical solution of this application, annular grooves are provided on both sides of the second connecting clamp, and protective covers are threaded into the annular grooves. The protective covers are used to protect the bolts and nuts.

[0008] As a preferred technical solution of this application, the sealing assembly includes an operating ring slidably mounted on the grouting rod and a sealing cap slidably mounted on the grouting pipe. A connecting ring is fixedly mounted on the top of the operating ring, and the top of the connecting ring is wrapped with rubber. The connecting ring and the sealing cap are threadedly connected, and the flange is protected by the rubber seal and the threaded engagement.

[0009] As a preferred technical solution of this application, a limit ring is fixedly installed on the grouting pipe to limit the sliding stroke of the sealing cap.

[0010] As a preferred technical solution of this application, the number of grouting rods can be flexibly adjusted according to the grouting depth, and multiple grouting rods can be connected in sequence to adapt to the filling requirements of gaps at different depths.

[0011] 1. By connecting and fixing the grouting drill rod to a certain length of Larssen sheet pile with multiple clamps, a grouting device is formed that can be directly clamped by Larssen sheet pile driving and pulling equipment. During construction, there is no need to equip an additional drilling machine. The operation can be carried out directly using the Larssen sheet pile driving and pulling equipment on site, saving the investment of drilling machines and professional operators, and greatly reducing labor and equipment costs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the first structure of the grouting pipe and Larssen sheet pile assembly of this utility model; Figure 3 This is a schematic diagram of the second structure of the grouting pipe and Larssen sheet pile assembly of this utility model; Figure 4 for Figure 2 Enlarged structural diagram at point A in the middle; Figure 5 for Figure 3 Enlarged structural diagram at point B.

[0013] In the diagram: 1. Grouting machine body; 2. Grouting pipe; 3. Grouting rod; 4. Larssen sheet pile; 5. Limiting assembly; 51. First connecting clamp; 52. Second connecting clamp; 53. Bolt; 54. Nut; 6. Sealing assembly; 61. Sealing cover; 62. Operating ring; 63. Connecting ring; 64. Limiting ring; 7. Flange; 8. Annular groove; 81. Protective cover. Detailed Implementation

[0014] 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.

[0015] This utility model provides a device for filling the gaps after the retaining piles are pulled out, such as... Figures 1-5 As shown, the grouting machine includes a main body 1, with a grouting pipe 2 fixedly connected to the end of the main body 1, and a grouting rod 3 fixedly connected to the end of the grouting pipe 2. The main body 1, grouting pipe 2, and grouting rod 3 form a complete grouting channel to ensure stable grout delivery. The grouting rod 3 is fixedly connected to the Larssen sheet pile 4 through multiple sets of limiting components 5, forming an integral structure that can be clamped by the Larssen sheet pile 4 driving and pulling equipment. No additional drilling rigs or other equipment are required, saving equipment costs and manpower. It is also suitable for scenarios such as rivers and complex terrains, eliminating the need to build cofferdams or other working platforms, thus reducing construction difficulty and costs. The grouting pipe 2 and the grouting rod 3 are fixedly connected through a flange 7, and sealing components 6 are provided on the grouting pipe 2 and the grouting rod 3 to protect the flange 7.

[0016] Among them, the multiple sets of limiting components 5 include multiple sets of first connecting clamps 51 fixedly installed on one side of the inner wall of the grouting machine body 1. The multiple sets of first connecting clamps 51 are fixedly connected to the second connecting clamps 52 by bolts 53 and nuts 54, which can stably connect the grouting rod 3 to the Larssen steel sheet pile 4, ensuring that the device is structurally stable during insertion and extraction, avoiding displacement of the grouting position or damage to components due to shaking, and improving the stability and safety of operation.

[0017] The second connecting clamp 52 has annular grooves 8 on both sides, and a protective cover 81 is threaded into the annular groove 8. The protective cover 81 is used to protect the bolt 53 and nut 54. The protective cover 81 can isolate the bolt 53 and nut 54 from the corrosion of soil and water, prevent them from rusting or being blocked by debris, extend the service life of the components, reduce the frequency of equipment maintenance and replacement due to fastener damage, reduce maintenance costs, and ensure the long-term reliable operation of the device.

[0018] The sealing assembly 6 includes an operating ring 62 that is slidably mounted on the grouting rod 3 and a sealing cap 61 that is slidably mounted on the grouting pipe 2. A connecting ring 63 is fixedly mounted on the top of the operating ring 62, and the top of the connecting ring 63 is wrapped with rubber. The connecting ring 63 and the sealing cap 61 are threadedly connected. The flange 7 is protected by the rubber seal and the threaded engagement. The rubber layer at the top of the connecting ring 63 and the threaded engagement of the sealing cap 61 form a double seal, protecting the flange 7 from soil abrasion and improving the sealing performance and durability of the grouting system.

[0019] Among them, a limiting ring 64 is fixedly installed on the grouting pipe 2 to limit the sliding stroke of the sealing cover 61. The limiting ring 64 prevents the sealing cover 61 from sliding excessively due to vibration or improper operation during operation, ensuring that the sealing assembly 6 is always aligned with the flange 7 and maintaining the stability of the sealing effect.

[0020] The number of grouting rods 3 can be flexibly adjusted according to the grouting depth. Multiple grouting rods 3 can be connected in sequence to adapt to the filling requirements of gaps at different depths, improving the versatility of the device. There is no need to customize special equipment for different projects, reducing equipment investment costs. At the same time, it simplifies the on-site assembly process and improves construction efficiency.

[0021] Working principle: The grouting rod 3 and Larssen sheet pile 4 are respectively attached to the first connecting clamp 51 and the second connecting clamp 52, and locked by bolts 53 and nuts 54. The protective cover 81 in the annular groove 8 on both sides seals the fixing parts to prevent soil erosion during operation. Then, according to the gap depth, multiple grouting rods 3 are spliced ​​to form a grouting channel of appropriate length. Using Larssen sheet piles 4, the entire device is vertically inserted into the soil voids left after the retaining piles are removed, until the bottom of the grouting rod 3 reaches the predetermined filling depth. The grouting machine body 1 is then started, and grout is injected into the soil voids sequentially through the grouting pipe 2 and the grouting rod 3. Simultaneously, the Larssen sheet pile driving and pulling equipment is slowly raised, allowing the grout to evenly fill the entire void as the device is lifted, until the top of the Larssen sheet pile reaches the ground, completing the grouting of a single void. When moving to the next void, there is no need to disassemble the grouting rod 3 or the clamp assembly; the insertion, grouting, and extraction process is repeated directly by clamping the Larssen sheet pile 4, efficiently completing multiple voids. During the continuous filling of voids, this continuous operation mode, which eliminates the need for drill rod disassembly and assembly, significantly reduces the time required for process connections, greatly improves construction efficiency, and can quickly complete the filling of voids in the soil. At the same time, since the device can be operated directly by the drilling and pulling equipment, there is no need for secondary leveling of the working platform. In complex environments such as river channels, there is no need to build temporary working platforms such as cofferdams, saving the high platform construction costs of traditional grouting operations. Furthermore, the rapid and effective void filling can stabilize the surrounding soil in a timely manner, reduce post-construction settlement of the foundation pit, and reduce the impact on the surrounding environment, which is in line with the concept of green construction.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A device for filling gaps after retaining pile extraction, comprising a grouting machine body (1), characterized in that: The grouting machine body (1) is fixedly connected to the end of the grouting pipe (2), and the end of the grouting pipe (2) is fixedly connected to the grouting rod (3). The grouting rod (3) is fixedly connected to the Larssen steel sheet pile (4) through multiple sets of limiting components (5) to form an overall structure that can be clamped by the Larssen steel sheet pile (4) driving and pulling equipment. The grouting pipe (2) and the grouting rod (3) are fixedly connected by a flange (7), and a sealing assembly (6) is provided on the grouting pipe (2) and the grouting rod (3) to protect the flange (7).

2. The void filling device after retaining pile extraction according to claim 1, characterized in that: The multiple sets of limiting components (5) include multiple sets of first connecting clamps (51) fixedly installed on one side of the inner wall of the grouting machine body (1). The multiple sets of first connecting clamps (51) are fixedly connected to second connecting clamps (52) by bolts (53) and nuts (54).

3. The gap-filling device after the retaining pile is pulled out according to claim 2, characterized in that: The second connecting clamp (52) has annular grooves (8) on both sides, and a protective cover (81) is threaded into the annular groove (8). The protective cover (81) is used to protect the bolt (53) and nut (54).

4. The void filling device after retaining pile extraction according to claim 1, characterized in that: The sealing assembly (6) includes an operating ring (62) slidably mounted on the grouting rod (3) and a sealing cap (61) slidably mounted on the grouting pipe (2). A connecting ring (63) is fixedly mounted on the top of the operating ring (62), and the top of the connecting ring (63) is wrapped with rubber. The connecting ring (63) and the sealing cap (61) are threadedly connected, and the flange (7) is protected by rubber sealing and threaded engagement.

5. The void filling device after retaining pile extraction according to claim 1, characterized in that: A limiting ring (64) is fixedly installed on the grouting pipe (2) to limit the sliding stroke of the sealing cover (61).

6. The void filling device after retaining pile extraction according to claim 1, characterized in that: The number of the grouting rods (3) can be flexibly adjusted according to the grouting depth, and multiple grouting rods (3) can be connected in sequence to meet the filling requirements of different depths of voids.

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