Upper transverse beam and lower transverse beam construction method for bridge cable bent tower

Abstract

The invention discloses an upper transverse beam and lower transverse beam construction method for a bridge tower. The method comprises the following steps: before normal construction, constructing hanging systems, tensioning first hanging systems on both sides of the tower respectively, and tensioning two groups of second hanging systems between the first hanging systems, wherein adjacent first hanging systems and second hanging systems can operate in a matching way or operate independently; performing upper transverse beam construction, constructing and pouring a first-segment side form, a second-segment side form and a third-segment side form, and constructing and pouring an upper transverse beam bottom form; after completion of upper transverse beam construction, pouring a lower transverse beam which is formed by means of prefabrication, performing transportation and installation through the hanging systems, and finally connecting an upper transverse beam with the lower transverse beam. Through adoption of a bracket-free construction technology, the construction cost is reduced, the construction period is shortened, and the construction safety is enhanced; the upper transverse beam and the lower transverse beam are constructed stepwise, so that the construction difficulty is lowered. Meanwhile, the upper transverse beam and the lower transverse beam are constructed stepwise, so that the construction difficulty is lowered, and the construction quality is enhanced.

Description

technical field [0001] The invention relates to a beam construction method, in particular to a construction method for an upper beam and a lower beam of a bridge cable tower. Background technique [0002] The cable tower refers to the tower-shaped structure supporting the main cable of the suspension bridge or the cable-stayed bridge. There are many types of cable tower structures, which are mainly selected according to the layout requirements of the cables, the width of the bridge deck and the span of the main beam. The commonly used forms of cable towers are single-column, A-shaped and inverted Y-shaped along the longitudinal direction of the bridge, and single-column, double-column, portal, oblique-leg portal, inverted V, inverted Y, A shape etc. The cross-section of the cable tower can adopt a solid interface according to the design requirements. When the cross-section size is large, the I-shaped or box-shaped cross-section is used. It is more reasonable to use a box-sh...

AI Technical Summary

Problems solved by technology

At present, the construction method of the beam structure of the cable tower is outdated and backward, and cannot meet the needs of the bridge span increase and the tower height change

At the same time, the erection period of the support is long, there is cross operation, and the construction safety risk is high

After the bracket is erected, it needs to be pre-pressed, which is time-consuming and consumable

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