Front fulcrum hanging basket reverse preloading device

Abstract

The invention discloses a reverse prepressing device for a front-support movable suspended scaffolding. The device comprises reverse hydraulic jack adjustment systems mounted on two bridges, wherein a precast beam is initially erected through a hoisting stander; the front-support movable suspended scaffolding is arranged on a web plate and a top plate of the precast beam; a first reverse prepressing device is used for adjusting a deviation of the precast beam along the vertical direction; the second reverse prepressing device is used for adjusting a deviation of the precast beam along the horizontal direction. According to the reverse prepressing device for the front-support movable suspended scaffolding, two reverse prepressing jack devices are provided; due to independent matching of two jacks, the deviations of the precast beams in the horizontal direction and the longitudinal direction can be adjusted, to realize matching between the precast beam and a cable-stayed bridge, and the construction precision is guaranteed. The second reverse prepressing device is fastened by a spherical pair, so that relative positions of the second reverse prepressing device and a flange of the precast beam can be adjusted, and the position adjustment in the horizontal direction is guaranteed. By the adoption of reverse prepressing, the precast beam and an adjustment mechanism can be connected more tightly, and the whole precast beam can be adjusted more flexibly and conveniently.

Description

technical field [0001] The invention relates to a reverse preloading device for a hanging basket at a front fulcrum, in particular to a double adjustment system for reverse preloading of a cable-stayed bridge, and belongs to the technical field of large-scale cable-stayed bridge construction. Background technique [0002] With the continuous advancement of bridge technology, my country has also made rapid progress in the construction technology of large bridges. Cable-stayed bridges, a complex bridge structure, have been widely used, especially for crossing seas, rivers, and rivers. Those with special requirements for spanning ability and navigation are a common form of bridge structure. As an important part of this type of bridge, the main girder directly bears various dynamic and static loads, wind loads, etc. The force is complex and the construction technology is difficult. In the early stage of construction, it is necessary to select from the selection of construction e...

AI Technical Summary

Problems solved by technology

[0003] The main girders of cable-stayed bridges currently under construction include steel box girders, steel-concrete composite girders, etc., but the construction of concrete main girders with hanging baskets at the front fulcrum is still a new direction of experimentation, although its technology is relatively mature in China. However, since the main span of large cable-stayed bridges often reaches more than 300m, the concrete main girder of cable-stayed bridges basically reaches the limit, and the structural form of each bridge is different. It is still necessary to carry out special research on basket construction technology and construction technology

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