Turnover construction process of high-pier forms

Abstract

The invention discloses a turnover construction process of high-pier forms, which includes the steps: performing casting in layers for a pier column according to the form height, and allowing a support and the forms to creep for turnover construction. Form turnover includes: after casting of each pier layer, turning up the forms when concrete strength is enough; mounting a cross beam at the top of a pier block; using a chain block to manually turn up the support; firming supporting fixed joints of the support and the pier forms when the support is in position; removing the lower form, and using the chain block to turn up the forms to the next layer; mounting the forms, and mounting the support and intra-pier support legs; and performing casting of the next layer of the pier column when stability is confirmed. Only the layer-height forms are processed for high-pier construction, so that form investment is reduced. No additional supports need to be erected in construction, so that support investment is reduced. In addition, the forms creep autonomously, so that investment of lifting machines is reduced.

Description

technical field [0001] The invention relates to a high pier turning form construction technology. Background technique [0002] With the rapid development of traffic and the improvement of bridge technology, modern bridges are gradually developing in the direction of large spans. Due to the structural needs and the constraints of the topography and landform of the bridge location, bridge piers with a height of more than 100 meters and hundreds of bridges are designed. Meter-high cable towers (used in cable-stayed bridges and suspension bridges) are no longer uncommon, which puts forward higher requirements for construction technology. Facing such a high hollow (or solid) thin-walled building, how to achieve high-quality, safe and efficient construction is a difficult problem in modern bridge construction. The traditional overturning construction method that has been used for a long time has the following shortcomings: [0003] (1) The operation platform must be formed by f...

AI Technical Summary

Problems solved by technology

[0003] (1) The operating platform must be formed by floor-to-ceiling scaffolding or a climbing frame made separately. After the construction of pier columns reaches a certain height, it is extremely unsafe for personnel to operate. Similar safety accidents often occur in actual construction

[0004] (2) The loading and unloading of the formwork needs to be completed by lifting equipment. The lifting equipment has many lifting times and low efficiency. At the same time, the formwork installation error is large and the correction is difficult, which restricts the quality of pier column construction

[0005] (3) For every rising section of the pier column construction, it is necessary to manually connect the high scaffold or lift the climbing frame, which is low in operation efficiency and increases the safety risk

[0006] (4) The wind resistance is low, in order to ensure safety, the actual operation time will be greatly reduced