Counter weight control construction method for large span un-symmetric segment stayed-cable bridge

Abstract

The invention discloses a method for controlling and constructing a balance weight for a large-span asymmetric section of a cable-stayed bridge, which comprises the following steps: constructing a cantilever girder section of a main span and a side span symmetrically with a guyed traveler; constructing a side span support cast-in-place girder section until the side span is joined; continuously constructing the cantilever girder section of the main span with the guyed traveler, which comprises the following sub-steps: determining a balance weight girder section to be constructed with a balanceweight, casting the balance weight girder section with concrete as a balance weight material, thoroughly measuring the marked elevation of the whole bridge and measuring the offset on the top of a cable support tower to make sure a dismountable balance weight support and dismount the balance weight support, casting the constructed cantilever girder section of the main span, and then mounting stayed cables; and repeating the previous step until the main span is joined. The method can overcome the problems that line shapes of the girders, the offset on the top of the tower, and the safety of a balance weight bearing support cannot be well controlled in the prior process for controlling and constructing the balance weight for the large-span asymmetric section.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a counterweight control construction method for a large-span asymmetric section cable-stayed bridge that controls the line shape of the cable-stayed bridge. Background technique [0002] Counterweight construction is one of the most important procedures in the controlled construction of cable-stayed bridges. At present, the counterweight control construction methods of asymmetric cable-stayed bridges that have been constructed are: 1. Counterweight steel sand or pebbles in the box. Method During construction, it is necessary to increase the construction load of the counterweight support bracket, thus resulting in a large investment in load-bearing support materials; 2. The construction process of the counterweight beam section is to first construct the counterweight of the side-span beam section, and then perform side-span closure. Then continue to construct the main ...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a construction method for counterweight control of long-span asymmetric section cable-stayed bridges in view of the deficiencies in the above-mentioned prior art, which is convenient for construction and can overcome the existing long-span asymmetric section counterweight control During the construction process, there are problems that the line shape of the beam, the offset of the tower top and the safety of the counterweight and load-bearing support cannot be better controlled

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