Construction method of temporary single diagonal bracing bridge tower

Abstract

The invention belongs to the field of bridge tower construction and discloses a construction method of a temporary single diagonal bracing bridge tower. The construction method comprises the following steps of: manufacturing a diagonal bracing device; gradually constructing a bridge tower; installing the diagonal bracing device between two tower columns in the construction process; and applying tension force to the diagonal bracing device so as to support the two tower columns in the transverse bridge direction. A traditional horizontal support construction method is improved; a triangular cone diagonal bracing mode is adopted, and the principle is that downward vertical force is applied to the top end of the diagonal bracing device, so that horizontal thrust in the transverse bridge direction is decomposed to act on the tower columns, and the outer side tensile strain of the bottoms of the tower columns of the bridge tower generated by self weight and construction loads is reduced. The method for applying the vertical force by a temporary device is simple, the internal force is adjustable, and the efficiency is high; under the requirement of the same supporting effect, the single temporary diagonal bracing can remarkably replace multiple groups of horizontal cross struts; the diagonal bracing is simple in structure;the diagonal bracing component is smaller in cross section than that of a traditional horizontal cross strut,lighter in weight and is convenient and fast in construction and has remarkable engineering significance and economic and social benefits.

Description

technical field [0001] The invention belongs to the field of bridge construction, in particular to a construction method of a temporary single-slant bridge tower. Background technique [0002] Most of the towers, towers, and cross bridges are designed as inclined structures, the purpose of which is to express the personality and visual effects of the towering bridge towers. The overall shape of the bridge reflects the architect's pursuit of aesthetics and cultural expression. More importantly, the design of the bridge tower column must be suitable for the arrangement of the stay cable or the main cable, the force transmission should be simple and clear, and under the action of the dead load, the bridge tower column should be in the state of axial compression as much as possible. Generally speaking, the layout of the bridge tower column has several types such as single column, A-shaped, inverted Y-shaped and H-shaped. Among them, the A-shape and inverted Y-shape have higher ...

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Problems solved by technology

[0003] There are three traditional methods for controlling the stress of bridge tower columns: one is the full house support method, which has a large workload, low work efficiency and greater danger; the other is to set horizontal horizontal braces. Although this method reduces the workload, However, it cannot overcome the deformation and lateral displacement of the bridge tower column due to its own weight; the third is to use jacks to change the passive support in method 2 into active support. Although this method improves the shortcomings of the above two methods, the horizontal brace structure The horizontal bracing is relatively long, and the efficiency of horizontal bracing is low. In order to ensure the stability of the force, a large cross-section is adopted, resulting in a large weight. Therefore, the existing horizontal cross bracing is difficult, expensive, time-consuming and poor in reliability.

Especially when the bridge tower column is high and the slope is large, it is necessary to set up multiple horizontal horizontal braces or combine the above-mentioned solutions, and the disadvantages of the existing technology and equipment are becoming more and more prominent.

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