Round jacking pipe rear backrest device

Abstract

The utility model discloses a round pipe jacking backrest device which comprises an arc-shaped abutting plate, a filling layer is fixedly installed at the position of a middle cavity of the arc-shaped abutting plate, a placing guide assembly is arranged on the filling layer, and two first supporting piles and two second supporting piles are fixedly installed on one side of the filling layer. The device is placed in a working well, the arc-shaped abutting plate abuts against the inner wall of the working well, two hydraulic oil cylinders are hung in and placed downwards through a crane, and in the process that the hydraulic oil cylinders are placed, the hydraulic oil cylinders can be placed above a bearing piece through the placing guide assembly, so that the hydraulic oil cylinders are placed. In the using process of the hydraulic oil cylinder, the rear end of the hydraulic oil cylinder can abut against the interior of the insertion groove through the counter-acting force of the hydraulic oil cylinder, the counter-acting force generated by fixing and abutting of the hydraulic oil cylinder is further transmitted and dispersed to the arc-shaped abutting plate, the force is dispersed to the rear well wall through the arc-shaped abutting plate, the abutting stability is improved, and the device cannot be damaged.

Description

Technical Field

[0001] This utility model relates to the field of underground pipeline construction technology, and in particular to a circular pipe jacking backrest device. Background Technology

[0002] Pipe jacking is a trenchless pipeline laying technique. It involves installing jacking equipment inside a working shaft and using a hydraulic jacking system to push pipe sections into the soil one by one, achieving precise underground pipeline installation. This technology offers advantages such as minimal impact on surface traffic, high construction efficiency, and controllable costs, making it particularly suitable for urban underground pipeline network construction. To ensure construction safety, the working shaft must employ support structures (such as sheet piles) to stabilize the surrounding soil and prevent groundwater from entering. Furthermore, the soil at the shaft entrance must be reinforced and sealed before jacking to prevent mud and water from flowing into the shaft, which could lead to surface subsidence or equipment damage.

[0003] In pipe jacking construction, large hydraulic cylinders are one of the key pieces of equipment, responsible for providing the powerful force needed to jack the pipe into the soil. However, large hydraulic cylinders require stable fixing devices to ensure their normal operation. Currently, the circular pipe jacking backrest device is commonly used in existing technologies to achieve this. Through reasonable design and structural layout, this device can provide reliable support and reaction force for the large hydraulic cylinders, keeping them stable during the jacking process and thus ensuring the smooth progress of pipe jacking construction. The application of the circular pipe jacking backrest device not only improves the safety and reliability of pipe jacking construction but also helps to improve construction efficiency and quality, making it an indispensable and important component of pipe jacking construction technology.

[0004] Patent document CN219242802U discloses a prefabricated backrest device for pipe jacking construction, relating to the field of pipe jacking construction devices. It includes a load-bearing component and a retaining component installed in a foundation pit. The load-bearing component comprises multiple load-bearing plates, with adjacent load-bearing plates abutting against each other, and the load-bearing plate closest to the foundation pit sidewall connected to the foundation pit sidewall. The retaining component is located around the outer periphery of the load-bearing component and is connected to the outermost load-bearing plate, serving to tightly clamp the multiple load-bearing plates. This application offers the advantage that workers can assemble the load-bearing component and retaining component on-site, simplifying assembly, saving time, and allowing for the reuse of the load-bearing component and retaining plate assembly.

[0005] In the prior art of the aforementioned patent, the working scenario of pipe jacking is generally inside the working shaft, relying on the backrest device to press against the side wall of the working shaft. However, the backrest device of the aforementioned pipe jacking is flat, and the contact area with the working shaft is too small. When the hydraulic cylinder is working, it is easy to cause the device to bend. Secondly, the device does not have a temporary place to place the hydraulic cylinder, which requires the hydraulic cylinder to be placed inside the working shaft and pressed against the backrest device. This also involves the calibration work of aligning the output end of the hydraulic cylinder with the sealing pile. This process is relatively cumbersome and inconvenient to use. Utility Model Content

[0006] The purpose of this utility model is to provide a circular top tube backrest device to solve the above-mentioned shortcomings in the prior art.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a circular jacking pipe backrest device, comprising an arc-shaped abutment plate, a filling layer fixedly installed in the middle cavity of the arc-shaped abutment plate, a guide component being placed on the filling layer, two first support piles and two second support piles fixedly installed on one side of the filling layer, a plurality of support members fixedly connected between the two first support piles and the two second support piles, connectors fixedly installed on the plurality of support members, two I-beams fixedly welded between the two second support piles, and load-bearing members fixedly welded on both I-beams.

[0008] As a further description of the above technical solution: two insertion slots are formed on the filling layer. The insertion slot includes a first part and a second part. The first part is set as a placement slot and the second part is set as an insertion slot. The insertion slot is formed inside the placement slot. The placement slot is set as a semi-racetrack shape and the insertion slot is annular.

[0009] As a further description of the above technical solution: a rubber pad layer is fixedly installed on the side of the arc-shaped abutment plate away from the filling layer.

[0010] As a further description of the above technical solution: the placement guide assembly includes two first guide members fixedly installed on the top of the filling layer and a second guide member disposed between the two first guide members. The second guide member is configured in a herringbone shape, and the two first guide members and the second guide member are fixedly connected by a back plate.

[0011] As a further description of the above technical solution: rollers are rolledly installed on the sidewalls of the two first guide members and on both sides of the second guide member.

[0012] As a further description of the above technical solution: the top of each of the multiple carriers is provided with a rubber part, and the inner wall of each of the two insertion slots is provided with an annular rubber ring.

[0013] This invention provides a circular pipe jacking backrest device. It offers the following advantages: The device is placed inside the working well, with an arc-shaped abutment plate abutting against the inner wall of the well. Two hydraulic cylinders are lowered using a crane. During placement, a guide assembly positions the hydraulic cylinders above the support structure. In use, the reaction force of the hydraulic cylinders pushes their rear ends into the insertion slot, further securing them. The reaction force generated by the abutment is distributed to the arc-shaped abutment plate, which then distributes the force to the rear well wall, increasing stability without damaging the device.

[0014] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0015] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of a circular top tube backrest device proposed in this utility model.

[0017] Figure 2 This is a partial top view of the structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the main structure of this utility model;

[0019] Figure 4 This is a partial cross-sectional view of the present invention.

[0020] Legend:

[0021] 1. Arc-shaped abutment plate; 2. Rubber pad layer; 3. First support pile; 4. Second support pile; 5. Connector; 6. Support component; 7. Filling layer; 8. Insertion groove; 9. Insertion groove; 10. Rubber ring; 11. First guide component; 12. Second guide component; 13. Roller; 14. Back plate; 15. I-beam; 16. Bearing component; 17. Rubber component. 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] Reference Figure 1-4A circular jacking pipe backrest device includes an arc-shaped abutment plate 1. A filling layer 7 is fixedly installed in the middle cavity of the arc-shaped abutment plate 1. A guide component is provided on the filling layer 7. Two first support piles 3 and two second support piles 4 are fixedly installed on one side of the filling layer 7. Multiple support members 6 are fixedly connected between the two first support piles 3 and the two second support piles 4. Connecting members 5 are fixedly installed on the multiple support members 6. Two I-beams 15 are fixedly welded between the two second support piles 4. Bearing members 16 are fixedly welded to both I-beams 15. In the working well... The device is placed inside, with the arc-shaped abutment plate 1 abutting against the inner wall of the working well. Two hydraulic cylinders are lowered in using a crane. During placement, the guide assembly allows the hydraulic cylinders to be positioned above the support member 16, thus achieving placement of the hydraulic cylinders. During use, the reaction force of the hydraulic cylinders can push the rear end of the cylinder into the insertion groove 9, further fixing the hydraulic cylinders. The reaction force generated by the abutment is transmitted and distributed to the arc-shaped abutment plate 1, which distributes the force to the rear well wall, increasing the abutment stability without damaging the device.

[0024] As a preferred technical solution in this embodiment, the filling layer 7 has two insertion slots, each including a first part and a second part. The first part is configured as a placement slot 8, and the second part is configured as an insertion slot 9. The insertion slot 9 is located inside the placement slot 8. The placement slot 8 is semi-racetrack shaped, and the insertion slot 9 is annular. When the hydraulic cylinder is lowered into the container by a crane, it is placed into the container through the placement slot 8. The hydraulic cylinder is placed above the placement slot 8 and the two support members 16, which can achieve initial fixation.

[0025] As a preferred technical solution in this embodiment, a rubber pad 2 is fixedly installed on the side of the arc-shaped abutment plate 1 away from the filling layer 7; the rubber pad 2 can protect the contact area between the arc-shaped abutment plate 1 and the well wall.

[0026] As a preferred technical solution of this embodiment, the placement guide assembly includes two first guide members 11 fixedly installed on the top of the filling layer 7 and a second guide member 12 disposed between the two first guide members 11. The second guide member 12 is configured as a herringbone shape, and the two first guide members 11 and the second guide member 12 are fixedly connected by a back plate 14. During the process of the crane lifting the cylinder, it is only necessary to keep the cylinder in the position between the first guide member 11 and the second guide member 12, without the need for precise docking of the bearing member 16 and the insertion slot 9, so that it falls automatically. Through the guide member, the cylinder can be placed in the corresponding position.

[0027] As a preferred technical solution in this embodiment, rollers 13 are rolledly installed on the side walls of the two first guide members 11 and on both sides of the second guide member 12; the rollers 13 make the cylinder insertion process smoother and reduce the friction between the cylinder and the guide member.

[0028] As a preferred technical solution of this embodiment, the top ends of the plurality of bearing members 16 are provided with rubber parts 17, and the inner walls of the two insertion grooves 9 are provided with annular rubber rings 10. The rubber parts 17 provided at the top ends of the bearing members 16 can protect the hydraulic cylinder. When the hydraulic cylinder is inserted into the insertion groove 9 due to the reaction force during operation, the rubber rings 10 can play a sealing and fastening role, increasing the stability of the hydraulic cylinder fixation.

[0029] 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 circular jacking pipe backrest device, comprising an arc-shaped abutment plate (1), wherein a filling layer (7) is fixedly installed in the cavity of the arc-shaped abutment plate (1), characterized in that, The filling layer (7) is provided with a guide assembly. Two first support piles (3) and two second support piles (4) are fixedly installed on one side of the filling layer (7). Multiple support members (6) are fixedly connected between the two first support piles (3) and the two second support piles (4). Connecting members (5) are fixedly installed on the multiple support members (6). Two I-beams (15) are fixedly welded between the two second support piles (4). Bearing members (16) are fixedly welded on both I-beams (15).

2. The circular jacking tube backrest device according to claim 1, characterized in that, Two insertion slots are provided on the filling layer (7). The insertion slots include a first part and a second part. The first part is set as a placement slot (8), and the second part is set as an insertion slot (9). The insertion slot (9) is opened inside the placement slot (8). The placement slot (8) is set as a semi-racetrack shape, and the insertion slot (9) is annular.

3. The circular top tube backrest device according to claim 1, characterized in that, A rubber pad layer (2) is fixedly installed on the side of the arc-shaped abutment plate (1) away from the filling layer (7).

4. The circular jacking tube backrest device according to claim 1, characterized in that, The placement guide assembly includes two first guides (11) fixedly installed on the top of the filling layer (7) and a second guide (12) disposed between the two first guides (11). The second guide (12) is configured in a herringbone shape. The two first guides (11) and the second guide (12) are fixedly connected by a back plate (14).

5. A circular top tube backrest device according to claim 4, characterized in that, Rollers (13) are tactilely mounted on the sidewalls of the two first guide members (11) and on both sides of the second guide member (12).

6. A circular jacking tube backrest device according to claim 2, characterized in that, Each of the multiple support members (16) is provided with a rubber member (17) at its top end, and the inner walls of the two insertion slots (9) are provided with annular rubber rings (10).

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