CN-116591062-B - Pushing structure system and pushing method

CN116591062BCN 116591062 BCN116591062 BCN 116591062BCN-116591062-B

Abstract

The invention provides a pushing structure system which comprises a bearing platform, a tension rod, a pushed part, a pushing driving part, a counter-force beam and a sliding plate, wherein the bearing platform is arranged between an existing structure and the sliding plate, the sliding plate is arranged close to the bearing platform, the upper surface of the sliding plate is flush with the upper surface of the bearing platform, one end of the tension rod is connected with the bearing platform, the other end of the tension rod is connected with the counter-force beam, one end of the pushing driving part is connected with the counter-force beam, the other end of the pushing driving part props against the pushed part, and the pushed part on the sliding plate is pushed onto the bearing platform through the pushing driving part. The invention realizes that the pile foundation of the bearing platform can not move forward to squeeze foundation soil in the pushing process, completely avoids the influence on the adjacent existing structures, and completely ensures the operation safety of the existing lines. In addition, the device has simple structure and definite force transmission, can realize that a plurality of pushed parts are pushed simultaneously, can not interfere with each other, can effectively shorten the construction period and save the manufacturing cost, and does not need to carry out large-area reinforcement treatment on the foundation.

Inventors

HAN XUELIANG
WANG BAOBAO
YANG QI
DU ZHIXIANG
FENG WEI
XU FANG
WANG SHAOJUN
XIN YAZHOU
LIU JINGQUAN

Assignees

中铁十二局集团有限公司
中国铁路上海局集团有限公司杭州铁路枢纽工程建设指挥部
中南大学
中铁十二局集团第三工程有限公司
中铁第四勘察设计院集团有限公司

Dates

Publication Date: 20260505
Application Date: 20230423

Claims (7)

1. A pushing structure system is characterized by comprising a bearing platform (3), a tension rod (4), a pushed part (5), a pushing driving part (6), a counter-force beam (7) and a sliding plate (9), wherein the bearing platform (3) is arranged between an existing structure (1) and the sliding plate (9), the sliding plate (9) is arranged next to the bearing platform (3) and the upper surface of the sliding plate (9) is flush with the upper surface of the bearing platform (3), one end of the tension rod (4) is connected with the bearing platform (3) while the other end is connected with the counter-force beam (7), one end of the pushing driving part (6) is connected with the counter-force beam (7), and the other end of the pushing driving part (6) props against the pushed part (5) to push the pushed part (5) on the sliding plate (9) to the bearing platform (3) through the pushing driving part (6); The tension rod (4) is detachably connected with the counter-force beam (7) and the bearing platform (3); the bearing platform (3) is detachably provided with a connecting plate (2), and the tension rod (4) is detachably connected to the connecting plate (2); The device also comprises a power assembly (8), wherein the power assembly (8) is connected with the pushing driving piece (6).
2. The pushing structure system according to claim 1, wherein F1 is a pulling force of a pulling rod (4) on a bearing platform (3), F2 is a friction force of a pushed piece (5) on the bearing platform (3), F3 is a friction force of the pushed piece (5) on a sliding plate (9), and the magnitude of F1 is equal to a pushing force of a pushing driving piece (6); f1 is always equal to the sum of F3 and F2 in the process that the pushed part (5) is pushed by the pushing driving part (6) at a constant speed; When the pushed part (5) is completely positioned on the sliding plate (9), F2 is 0, F3 is the maximum value, and at the moment, F3=F1; In the process that the pushed piece (5) is pushed from the sliding plate (9) to the bearing platform (3), F3 gradually decreases from the maximum value, F2 gradually increases from 0, and at the moment, F1 is more than F2, and F1 is more than F3; When the pushed part (5) is completely pushed to the bearing platform (3), F3 is 0, F2 reaches the maximum value, and at the moment, F1=F2.
3. The pushing structure system according to claim 2, wherein the plurality of groups of tension rods (4) and the plurality of groups of pushing driving members (6) are symmetrically arranged according to a central vertical plane of the pushed member along the pushing direction.
4. A pushing structure according to claim 3, characterized in that the pull rod (4) is provided with a rolling element, and the pull rod (4) is in rolling contact with the pushed element through the rolling element.
5. The pushing structure system according to claim 3 or 4, characterized in that the pushed member (5) is provided with a via hole allowing the tension rod (4) to pass through.
6. The pushing structure according to claim 1, characterized in that the bottom surface of the counter-force beam (7) is provided with road wheels.
7. A pushing method of the pushing structure system according to any one of claims 1 to 6, characterized in that: the method comprises the steps of 1, installing a connecting plate (2), a tension rod (4), a pushing driving piece (6) and a counter-force beam (7), and driving the pushing driving piece (6) to push a pushed piece (5) from a sliding plate (9) to a bearing platform (3); Step 2, when the movement stroke of the pushing driving piece (6) is extended, the connection between the tension rod (4) and the counter-force beam (7) is disassembled, the pushing driving piece is retracted, and the counter-force beam (7) moves in the direction approaching to the pushed piece (5); step 3, after the pushing driving piece (6) is retracted in place, the tension rod (4) is connected with the counter-force beam (7) again, and the pushing driving piece (6) continues to extend out to push the pushed piece (5); and 4, repeating the steps 2-3, detaching the connecting plate (2), the tension rod (4), the pushing driving piece (6) and the counter-force beam (7) after the pushing piece (5) is pushed in place, and reinstalling the connecting plate (2), the tension rod (4), the pushing driving piece (6) and the counter-force beam (7) to push the next pushed piece (5).

Description

Pushing structure system and pushing method Technical Field The invention relates to the technical field of pushing construction, in particular to a pushing structure system and a pushing method. Background The coastal economy is rapidly developed, the passenger and cargo transportation capacity of railways is continuously increased, particularly, the planning and construction of railways in the urban area are continuously increased, new railway lines are continuously built close to or even close to the existing high-speed railway lines, the use and driving safety of equipment such as the existing line contact net and the like are easily influenced by the close to or cast-in-situ bridge, and therefore a construction method of transversely pushing the prefabricated frame bridge is generally adopted. The existing transverse pushing method has the following defects: 1) The traditional pushing method needs to arrange a counter-force wall, and the counter-force wall in a deep soft soil area needs to be solely subjected to foundation reinforcement treatment, and meanwhile, under the action of large-tonnage pushing, a bearing platform pile foundation of a frame bridge is caused to move forward to squeeze foundation soil, so that the deformation of an upper arch of a roadbed, a bridge and a tunnel and even the deformation of a track are caused to be out of limit, and the operation safety of the existing line is influenced; 2) The existing counterforce wall is mostly fixed, needs to be built or installed in advance, and has the problems of material consumption, low efficiency, trouble, uneconomical and environmental protection. The adoption of the movable foundation reinforcement method requires large-area foundation reinforcement treatment, and meanwhile, tens or even hundreds of anchor bolt holes are required to be arranged to realize the movement of the counterforce wall, so that the engineering quantity is large and the method is uneconomical. In view of the foregoing, there is a need for a pushing structure system and a pushing method to solve the problems in the prior art. Disclosure of Invention The invention aims to provide a pushing structure system, which aims to solve the problems of time and labor waste, uneconomical and environmental protection of pushing existing structures in the traditional pushing method, and the specific technical scheme is as follows: The pushing structure system comprises a bearing platform, a tension rod, a pushed driving piece, a counter-force beam and a sliding plate, wherein the bearing platform is arranged between an existing structure and the sliding plate, the sliding plate is arranged next to the bearing platform, the upper surface of the sliding plate is flush with the upper surface of the bearing platform, one end of the tension rod is connected with the bearing platform, the other end of the tension rod is connected with the counter-force beam, one end of the pushing driving piece is connected with the counter-force beam, the other end of the pushing driving piece props against the pushed piece, and the pushed piece on the sliding plate is pushed onto the bearing platform through the pushing driving piece. In the above technical scheme, preferably, F1 is the tension of the tension rod to the bearing platform, F2 is the friction of the pushed part to the bearing platform, F3 is the friction of the pushed part to the sliding plate, and the size of F1 is equal to the pushing force of the pushing driving part; f1 is always equal to the sum of F3 and F2 in the process that the pushed part is pushed by the pushing driving part at a constant speed; when the pushed part is completely positioned on the sliding plate, F2 is 0, F3 is the maximum value, and at the moment, F3=F1; In the process that the pushed piece is pushed from the sliding plate to the bearing platform, F3 gradually decreases from the maximum value, F2 gradually increases from 0, and at the moment, F1 is more than F2, and F1 is more than F3; when the pushed part is completely pushed to the bearing platform, F3 is 0, and F2 reaches the maximum value, and f1=f2 at this time. In the above technical scheme, preferably, a plurality of groups of tension rods and a plurality of groups of pushing driving parts are symmetrically arranged according to the center vertical plane of the pushed part along the pushing direction. In the above technical scheme, preferably, the tension rod is provided with a rolling element, and the tension rod is in rolling contact with the pushed element through the rolling element. In the above technical solution, preferably, the pushed member is provided with a via hole allowing the tension rod to pass through. In the above technical scheme, the tension rod is detachably connected with the counter-force beam and the bearing platform. In the above technical scheme, preferably, the bearing platform is detachably provided with a connecting plate, and the tension rod is detachably connected to th