High-performance sliding device for large-tonnage jacking projects

Abstract

The invention discloses a high-performance sliding device oriented to large-tonnage incremental launching engineering. The high-performance sliding device oriented to large-tonnage incremental launching engineering is characterized in that the high-performance sliding device comprises a ground anchor unit, a sliding plate unit on the ground anchor unit, a back unit, a horizontal sliding unit on the sliding plate unit and horizontal deviation correction units on the two sides of the sliding plate unit. The high-performance sliding device oriented to large-tonnage incremental launching engineering has the beneficial effects that since a sliding groove form is adopted, four sliding ways are designed, sliding blocks slide on the sliding plate of the sliding ways and each group of transverse sliding blocks are connected by using pin shafts, the incremental launching stability is high and the direction is easy to control; since guide piers are additionally arranged on the left and right sides of the sliding plate, a box body is prevented from being excessively deviated during incremental launching; the occupied space is small, the operation is facilitated, the operation stability is high, the safety and reliability are high, the construction period is short, the investment is small, the social and economic benefits are good and the sliding device is suitable for the construction technique of one-step multi-point in-situ incremental launching of large-tonnage full-size prefabricated boxes.

Description

technical field [0001] The invention relates to a high-performance sliding device for large-tonnage jacking projects, and belongs to the technical field of jacking construction for underpassing existing lines. Background technique [0002] In recent years, with the rapid development of my country's transportation industry, a considerable-scale railway transportation network has been formed that traverses east and west, connects north and south, and combines trunk and branch. However, the construction of a large-scale highway traffic network inevitably overlaps with the railway traffic network, and the construction mode of adding bridges and culverts to form highway-rail interchanges on operating railway lines has become a normal state. For example: the original level crossings of some railways and roads cannot meet the requirements of traffic safety and smooth traffic flow, and need to be transformed into three-dimensional intersections; some stations with large passenger tr...

AI Technical Summary

Problems solved by technology

Damage to the slide plate leads to an increase in sliding frictional resistance; the local stress on the bottom plate of the box body is too large, causing the supporting position of the bottom plate to crack

Moreover, the friction system of polytetrafluoroethylene plate + stainless steel plate is used in the jacking construction, and its disadvantages are: low compressive strength, poor creep resistance, and most of them bear heavy loads, which change with the working conditions , the bearing capacity of the single-point slider increases, resulting in the deformation and damage of the polytetrafluoroethylene layer on the friction surface, and the effect is not good.

[0005] In addition, when excavating the working pit and the slide anchor beam foundation pit, it will inevitably cause disturbance of the foundation soil and reduce the bearing capacity of the foundation. In addition, the foundation soil itself may be relatively soft, so that the bearing capacity of the foundation cannot meet the requirements of the jacking culvert

On the other hand, the decline in the bearing capacity of the foundation weakens the lateral resistance of the foundation to the ground anchor beam, causing the horizontal deviation or overturning of the ground anchor beam, which causes the slide to slide forward during the jacking process and deforms the entire slide

The above problems will make the progress of the jacking work not smooth, and according to the construction needs, sometimes the traffic needs to be interrupted, which causes great inconvenience to the transportation; the jacking slide is damaged and cannot be used anymore, and needs to be replaced, which also makes the jacking construction cost obvious. Increase

At present, the existing technology still cannot effectively solve the above problems

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