Cantilever pouring arch control method with buckle cable steering device on the column of long-span main arch

Abstract

The invention relates to the field of arch bridge construction, in particular to a method for controlling the cantilever pouring of a large-span arch bridge into an arch, comprising the following steps: first constructing a junction pier, and setting a plurality of buckle cable anchorage points at different positions on the junction pier according to the force requirements , each anchorage point of the buckle cable is connected with the buckle cable; the arch feet are respectively constructed from the left and right ends of the arch bridge, and then each main arch segment is cantilevered sequentially from the left and right arch feet of the arch bridge. During the construction process, at the left end of the arch bridge The main arch columns are respectively constructed on a formed main arch segment of the bridge and on a formed main arch segment at the right end of the arch bridge, and buckle towers are arranged on the top of the columns, and multiple steering saddles are arranged on the buckle towers; the buckle cables pass through the buckle towers The steering saddle is anchored at the anchorage point of the buckle cable on the junction pier, and the cantilever pouring of the main arch segment continues until it is closed. The invention not only ensures the stability of the buckle tower itself in the construction process, but also ensures the construction accuracy of the arch ring, and can make the construction of the long-span arch bridge light.

Description

technical field [0001] The invention relates to the field of arch bridge construction, in particular to an arch control method for cantilever pouring of a large-span arch bridge. Background technique [0002] The cantilever pouring method is to set up the operation platform on both sides of the bridge, set up the cable-stayed buckle system, use the temporary cable-stayed buckle cable to buckle the poured arch ring segment, and then anchor it to the abutment or anchorage through the anchor cable, and then use The mobile hanging basket is a construction method in which the concrete of the arch ring is poured symmetrically section by section from the arch feet on both sides of the bank until the arch top is closed. In the cantilever pouring construction using the cable-stayed buckle-hanging system, the stress safety of the arch ribs during construction, the rationality of the internal force distribution after arching, and the Rib linetype accuracy. [0003] Such as Figure 1-...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to: aim at the problem that the buckle tower is arranged on the top of the junction pier in the prior art, resulting in many anchor points on the buckle tower column, large force on the buckle cable, large amount of use, and easy to produce large deformation. A long-span arch bridge cantilever pouring arch control method, which rationalizes the control distribution of buckle cables, reduces the stress on buckle towers, and improves construction safety

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