CN-224228681-U - Pipe jacking hole plugging device under steel casing

Abstract

The utility model discloses a plugging device for a lower pipe jacking hole of a steel casing, which comprises an arc-shaped plate, wherein the arc-shaped plate is tightly attached to the periphery of a hole on a working well, a compensation pipe is fixedly welded at an opening of the arc-shaped plate, the inner diameter of the compensation pipe is consistent with the size of the hole, one end, close to the hole, of the compensation pipe is set as a butt joint surface, the butt joint surface is attached to the inner wall of the working well, and a plugging component is arranged at the other end of the compensation pipe. According to the utility model, the arc-shaped plate and the compensation pipe are installed, so that the sealing of a blocking area can be realized, one end of the compensation pipe is attached to the wall of a working well, the other end of the compensation pipe is flat, and compared with a traditional blocking mechanism, the blocking mechanism has the advantages that the operation difficulty is smaller, the blocking effect is better, the sealing gasket can increase the sealing performance of the joint between the compensation pipe and the blocking pipe, and the blocking performance of the blocking pipe can be further realized by matching with the flange connection assembly.

Inventors

• Wu Fangbi
• YIN ZHENGPING
• YAO YU
• ZHANG HENG
• Ge Anxing
• ZHANG WEI
• FANG WEI
• JI LEI
• ZHANG YU
• Chai xiang
• YUAN JIANGBIN
• WANG YUTAO

Assignees

• 中铁四局集团上海工程有限公司
• 中铁四局集团有限公司

Dates

Publication Date

20260512

Application Date

20250630

Claims (6)

1. 1. The utility model provides a push pipe entrance to a cave plugging device under steel pile casing, includes arc (4), around arc (4) closely laminate on work well (1) upper shed (2), its characterized in that, fixed welding in trompil department of arc (4) has compensation pipe (7), the internal diameter size of compensation pipe (7) keeps unanimous with the size of shed (2), compensation pipe (7) are close to shed (2) one end and set up into butt joint face (8), butt joint face (8) laminate mutually with the inner wall of work well (1), the other one end of compensation pipe (7) is provided with shutoff subassembly, be provided with coupling assembling between shutoff subassembly and the compensation pipe (7).
2. 2. The plugging device for the lower pipe jacking hole of the steel casing according to claim 1, wherein a sealing element (5) is fixedly arranged at the edge of the arc-shaped plate (4), a sealing groove (3) is formed in the inner wall of the working well (1), the sealing groove (3) is in sealing butt joint with the sealing element (5), a fixed anchor rod (6) is fixedly arranged on the arc-shaped plate (4), and the arc-shaped plate (4) and the working well (1) are fixedly locked through the fixed anchor rod (6).
3. 3. The plugging device for the lower pipe jacking hole of the steel casing according to claim 1, wherein the plugging assembly comprises a plugging pipe (10), the plugging pipe (10) is mutually attached to the inner wall of the compensation pipe (7), an extension part (11) is outwards expanded at the edge of one end, far away from the hole (2), of the plugging pipe (10), a groove (14) is formed in one side, close to the hole (2), of the extension part (11), the groove (14) is arranged in an annular shape, and the groove (14) is mutually spliced and matched with one end, far away from the hole (2), of the compensation pipe (7).
4. 4. A pipe jacking hole plugging device under a steel casing according to claim 3, wherein the connecting assembly comprises a flange plate (9) fixedly welded on the side wall of the compensation pipe (7), a plurality of flange holes (15) are formed in the extending part (11), the flange holes (15) correspond to the flange holes (15) in the flange plate (9), a screw rod (12) is connected between the flange holes (15) in the extending part (11) and the flange holes (15) in the flange plate (9), and nuts (13) are locked at two ends of the screw rod (12).
5. 5. The plugging device for the lower jacking pipe opening of the steel casing according to claim 1, wherein a sealing glue layer (16) is arranged at the joint of the compensating pipe (7) and the inner wall of the working well (1).
6. 6. A steel casing lower jacking pipe opening plugging device according to claim 3, characterized in that a sealing gasket (17) is arranged in the groove (14), and the sealing gasket (17) is arranged in a ring shape and is mutually abutted with the compensation pipe (7).

Description

Pipe jacking hole plugging device under steel casing Technical Field The utility model relates to the technical field of underground pipeline construction, in particular to a plugging device for a lower jacking pipe opening of a steel casing. Background The pipe jacking construction is a non-excavation pipeline laying process, pipe joints are jacked into soil layers section by utilizing a hydraulic jacking system through installing pipe jacking equipment in a working well, and accurate laying of underground pipelines is achieved. The technology has the advantages of small influence on ground traffic, high construction efficiency, controllable cost and the like, and is particularly suitable for urban underground pipe network construction. In order to ensure construction safety, the working well needs to adopt a supporting structure (such as steel sheet piles) to stabilize the peripheral soil body and separate underground water, and meanwhile, the soil body in the hole area needs to be reinforced and sealed before jacking, so that earth surface settlement or equipment damage caused by mud water rushing into the well is prevented. The steel sheet pile support is a working well enclosure mode commonly used in pipe jacking engineering, and a continuous cylindrical structure is formed by driving the steel sheet pile into the periphery of a foundation pit, so that soil body support is provided, and an anti-seepage effect is achieved. In the higher region of groundwater level, still need cooperate the precipitation well to reduce groundwater level, water gushing and sand gushing take place when avoiding breaking the hole. The supporting system can effectively control soil layer deformation, ensure stable jacking of the pipe jacking equipment, reduce influence on surrounding buildings and pipelines, and is a key technical link of safe implementation of pipe jacking construction. The utility model discloses a large-diameter pipe jacking construction hole plugging device, which belongs to the technical field of pipe jacking construction and is technically characterized by comprising a mounting plate, wherein one side of the mounting plate is fixedly connected with a fixing ring, the inside of the fixing ring is in annular array threaded connection with threaded rods, the outer sides of all the threaded rods are in threaded connection with anti-overflow plates, the outer sides of all the anti-overflow plates are fixedly connected with sealing blocks, one ends of all the threaded rods, far away from the anti-overflow plates, of all the threaded rods are fixedly connected with bevel gears, the outer sides of the fixing ring are provided with worm gear rings in rotary connection with the mounting plate, the inner sides of the worm gear rings are fixedly connected with bevel gear rings in meshed connection with all the bevel gears, the outer sides of the worm gear rings are in meshed connection with worms, and the outer sides of the worms are symmetrically and rotationally connected with the fixing blocks. In the prior art of the above patent, the opening is formed in the side wall at the bottom of the working well, the steel sheet pile needs to be installed, however, the size of the opening is generally larger than that of the steel sheet pile, at this time, the gap between the steel sheet pile and the wall of the opening needs to be filled, the opening is not planar, the area needing to be plugged is a curved surface with radian, the device comprises a large part of plugging structures in the prior art, the plugging structures are plugging plates with planar structures, the plugging areas are plugged, and then the gap between the opening and the steel sheet pile is plugged by the annular plugging pieces, but a large gap is formed between the plugging pieces of the planar structures and the curved surface side wall, so that the plugging effect is poor. Disclosure of utility model The utility model aims to provide a plugging device for a lower pipe jacking hole of a steel casing, which aims to solve the defects in the prior art. In order to achieve the purpose, the lower pipe jacking hole plugging device of the steel casing comprises an arc-shaped plate, wherein the arc-shaped plate is tightly attached to the periphery of a hole in a working well, a compensation pipe is fixedly welded at an opening of the arc-shaped plate, the inner diameter of the compensation pipe is consistent with the size of the hole, one end, close to the hole, of the compensation pipe is set to be a butt joint surface, the butt joint surface is attached to the inner wall of the working well, a plugging assembly is arranged at the other end of the compensation pipe, and a connecting assembly is arranged between the plugging assembly and the compensation pipe. According to the technical scheme, the sealing element is fixedly arranged at the edge of the arc-shaped plate, the sealing groove is formed in the inner wall of the working well and is in seali