CN-117329354-B - Starting well structure for pipe jacking construction

CN117329354BCN 117329354 BCN117329354 BCN 117329354BCN-117329354-B

Abstract

The application relates to an initial well structure for pipe jacking construction, which relates to the technical field of pipe jacking construction and comprises a well body, an operation platform arranged in the well body, a jacking device arranged on the operation platform and a retaining mechanism arranged on the side edge of the jacking device, wherein the jacking device comprises a reaction frame, an oil cylinder and a jacking iron, the jacking iron is slidably arranged on the operation platform, the reaction frame is used for fixing the oil cylinder and providing reaction force support, the oil cylinder comprises a pushing oil cylinder pushing the jacking iron to jack and a retraction oil cylinder driving the jacking iron to return, the retraction oil cylinder comprises a first retraction oil cylinder, a telescopic head ball of the first retraction oil cylinder is hinged on the jacking iron, and the first retraction oil cylinder is symmetrically arranged on two sides of the jacking iron. The application has the effects of simplifying the construction flow of jacking construction and improving the construction efficiency.

Inventors

XU LEI
CHEN YANZI
HE ZIYANG
Peng Chenxin
GONG YAOYU
Zhou Zongbo
ZHANG JIE
YU SIYI

Assignees

上海建工一建集团有限公司

Dates

Publication Date: 20260512
Application Date: 20230925

Claims (6)

1. The starting well structure for pipe jacking construction comprises a well body (1), an operation platform (2) arranged in the well body (1), a jacking device (3) arranged on the operation platform (2) and a stopping mechanism (4) arranged on the side edge of the jacking device (3), and is characterized in that the jacking device (3) comprises a counter-force frame (31), an oil cylinder (32) and a top iron (33), the top iron (33) is slidably arranged on the operation platform (2), the counter-force frame (31) is used for fixing the oil cylinder (32) and providing counter-force support, the oil cylinder (32) comprises a pushing oil cylinder (321) for pushing the top iron (33) to jack and a retraction oil cylinder (322) for driving the top iron (33) to return, the retraction oil cylinder (322) comprises a first retraction oil cylinder (3221), telescopic head balls of the first retraction oil cylinder (3221) are hinged on the top iron (33), and the first retraction oil cylinders (3221) are symmetrically arranged on two sides of the top iron (33); The first retraction cylinder (3221) is arranged at the middle position of the top iron (33) in the height direction, the retraction cylinder (322) further comprises a second retraction cylinder (3222), the second retraction cylinder (3222) is arranged at the bottom of the top iron (33), and the telescopic head of the second retraction cylinder (3222) faces the direction of the prefabricated pipe joint (5); The retaining mechanism (4) comprises a retaining frame (41) and a limiting pin assembly (42) arranged on the retaining frame (41), wherein the limiting pin assembly (42) comprises an electric cylinder (422), a first sliding cavity (423), a second sliding cavity and a limiting pin (425), the first sliding cavity (423) is fixed on the retaining frame (41), a stepped hole-shaped sliding hole is formed in one side, close to a prefabricated pipe joint (5), of the first sliding cavity (423), the second sliding cavity (424) is slidably arranged in the first sliding cavity (423), a first spring (426) is arranged in the second sliding cavity (424), and the first spring (426) applies thrust to the second sliding cavity (424) far away from the prefabricated pipe joint (5); the limiting pin (425) is slidably arranged in the second sliding cavity (424), a second spring (427) is arranged in the second sliding cavity (424), and the second spring (427) applies thrust to the limiting pin (425) close to the prefabricated pipe joint (5); The telescopic rod of the electric cylinder (422) penetrates through the first sliding cavity (423) and the second sliding cavity (424) and stretches into the second sliding cavity (424), a limiting ring (4221) is arranged at the end part of the telescopic rod of the electric cylinder (422), and when the second sliding cavity (424) is completely immersed into the first sliding cavity (423), the limiting ring (4221) abuts against the cavity wall of the second sliding cavity (424) close to the electric cylinder (422); One end of the limiting pin (425) close to the prefabricated pipe joint (5) is provided with a guiding inclined plane (4251).
2. The starting well structure for pipe jacking construction according to claim 1, wherein the working platform (2) comprises a jacking guide rail (23), the jacking guide rail (23) is arranged along the jacking direction of the prefabricated pipe joint (5), the section of the jacking guide rail (23) is a U-shaped or C-shaped notch with an upward opening, a steel structure sliding block (333) is arranged at the bottom of the jacking iron (33), and the steel structure sliding block (333) is embedded in the jacking guide rail (23).
3. The starting well structure for pipe jacking construction according to claim 1, wherein the limiting pin (425) is provided with a roller (428) near the end of the prefabricated joint in a rotating way, and a rotating shaft of the roller (428) is vertically arranged.
4. The starting well structure for pipe jacking construction according to claim 1, wherein a first pressure sensor (429) is mounted on one side of the limiting pin (425) far away from the guiding inclined surface (4251), and a second pressure sensor is mounted on the contact surface of the prefabricated pipe joint (5) on the top iron (33).
5. The originating well structure for pipe jacking construction according to claim 2, wherein the working platform (2) further comprises a supporting beam (21) and a supporting plate (22), the supporting beam and the supporting beam are arranged along the jacking direction of the prefabricated pipe joint (5), the supporting beam and the supporting beam are arranged in parallel and horizontally paved at the bottom of the well body (1), the supporting plate (22) is fixed on the upper side of the supporting beam (21), and the jacking guide rail (23) is fixed on the supporting plate (22).
6. The starting well structure for pipe jacking construction according to claim 5, wherein the reaction frame (31) comprises a back wall backing plate (311) and a mounting frame (312), the back wall backing plate (311) is fixed on the side wall of the well body (1) far away from the jacking direction of the prefabricated pipe joint (5), the mounting frame (312) is fixed on the supporting plate (22), and the mounting frame (312) is provided with a plug-in hole for inserting the mounting oil cylinder (32).

Description

Starting well structure for pipe jacking construction Technical Field The application relates to the field of pipe jacking construction technology, in particular to an initial well structure for pipe jacking construction. Background The pipe jacking construction is a non-excavation construction method, and is a pipeline buried construction technology with no excavation or little excavation. The pipe jacking construction is to overcome the friction force between the pipeline and the surrounding soil by means of the jacking equipment in the working pit, jack the pipeline into the soil according to the designed gradient and transport away the earth. After one pipe is pushed into the soil layer, a second pipe is pushed into the soil layer. The principle is that by means of the thrust of the main top oil cylinder, the pipeline, the relay and the like, a tool pipe or a heading machine is pushed from the inside of a working pit to the inside of a receiving pit through a soil layer to be lifted. The pipeline is buried between two pits after following the tool pipe or the heading machine. The pipe jacking construction has the advantages of small excavation area, low comprehensive cost, high construction efficiency, high rectangular section utilization rate and the like, and has wide development prospect in the field of urban underground engineering construction. In the related art, the working pit comprises an originating well and a receiving well, and a reaction frame, a driving oil cylinder, an operation platform, a top iron, a chute and a backstop mechanism are arranged in the originating well. In the pipe jacking construction process, shield equipment and prefabricated pipe joints are sequentially hoisted and placed on an operation platform and a chute in an originating well, then a driving oil cylinder is used for pushing a top iron, the prefabricated pipe joints and the shield equipment are pushed forward by the top iron, after each forward pushing stroke of the driving oil cylinder, the oil cylinder is required to be retracted, the prefabricated pipe joints are limited by a retaining mechanism before retraction of the oil cylinder, a heavy top iron is hoisted and lowered by a crane again to enable the top iron to reset, a placing space is provided for the next prefabricated pipe joint, then the next prefabricated pipe joint is put down for jacking, and the limit of the retaining mechanism is released before jacking. The retaining mechanism comprises a retaining mechanism fixed on the working platform and a connecting pin inserted and fixed on the retaining mechanism and the prefabricated pipe section, after the new section of prefabricated pipe section moves to a set position, the connecting pin is simultaneously inserted into the retaining mechanism and the new section of prefabricated pipe section to realize fixation, so that the retaining mechanism can prevent backing, when the connecting pin is removed, the connecting pin can be smoothly removed only after the other section of ejector iron is abutted tightly, and the connecting pin is inconvenient to remove. In actual construction, repeated hoisting of roof iron, repeated disassembly and assembly of connecting pins and the like complicate construction procedures, increase of construction cost and delay of construction progress. In order to improve the construction efficiency, the inventor designs a pipe jacking construction initiation well structure aiming at the related technology. Disclosure of Invention In order to reduce construction cost and shorten construction period, the application provides an originating well structure for pipe jacking construction, which has the effects of reducing construction procedures and shortening construction period. The application provides an originating well structure for pipe jacking construction, which adopts the following technical scheme: The utility model provides a push pipe construction is with starting well structure, includes the well body, sets up in the internal operation platform of well, installs the jacking device on operation platform and sets up the stopping mechanism at jacking device side, jacking device includes reaction frame, hydro-cylinder and top iron, top iron slidable mounting on operation platform, and the reaction frame is used for fixed hydro-cylinder and provides the reaction force support, and the hydro-cylinder includes the top hydro-cylinder that promotes the top iron jack-up and drives the hydro-cylinder that returns of top iron, the hydro-cylinder that returns includes first hydro-cylinder that returns, the flexible head ball of first hydro-cylinder that returns articulates on the top iron, first hydro-cylinder that returns sets up in the both sides of top iron symmetry. By adopting the technical scheme, the jacking iron is jacked into the prefabricated pipe joint through the jacking oil cylinder, the jacking iron is pulled back and reset through the first retraction oil cylinder, the