A kind of construction method and structure in construction of No. 0 block of high-pier cable-stayed bridge without supports

Abstract

The invention provides a high-pier cable-stayed bridge zero-number block non-bracket construction method and a structure in the construction process, and relates to the field of high-pier cable-stayed bridge construction. According to the construction method, a zero-number block is divided into a plurality of sections to be poured. First, two sleeper beams are laid on a main tower cross beam, and a spandrel girder is erected on each sleeper beam; then, the spandrel girders are anchored through a rear anchoring system. Each spandrel girder is provided with a suspension system to which a suspension bottom formwork system and a side formwork system are hung. Pouring of the zero-number block is realized section by section by moving the suspension systems and the sleeper beam close to the suspension systems till construction of the whole zero-number block is completed. By the adoption of the construction method, there is no need to use an ultrahigh extra-large steel tube stand column bracket or a steel corbel bracket, there is no need to utilize stay cables, as a result, construction cost and construction requirements are lowered, and the problem that a zero-number block which is high above the ground and has ultra-long sections is difficult to construct is solved.

Description

technical field [0001] The invention relates to the construction field of high-pier cable-stayed bridges, in particular to a support-free construction method for No. 0 block of a high-pier cable-stayed bridge and a structure during construction. Background technique [0002] With the increasing development of the transportation network, higher requirements are placed on the spanning capacity of bridges, and large cable-stayed bridges and suspension bridges spanning mountains, rivers and valleys have also emerged as the times require. In the process of building this long-span cable-stayed bridge, the construction of the No. 0 block of the concrete main girder is particularly important. The conventional construction method of the No. 0 block of the main girder of the cable-stayed bridge is to adopt the construction structure of the ground bracket next to the pier or the construction structure of installing the steel corbel bracket. For the former type of construction structur...

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Problems solved by technology

[0004] Aiming at the defects existing in the prior art, the object of the present invention is to provide a construction method and a structure in the construction of No. 0 block of a high-pier cable-stayed bridge without support, which reduces the construction cost and construction requirements, and solves the problem of high distance from the ground. , The problem that block No. 0 with super long sections is difficult to construct

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