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

A construction method and technology for cable-stayed bridges, applied in cable-stayed bridges, bridges, bridge forms, etc., can solve problems such as tower top offset, inability to better control beam alignment, etc., so as to correct tower offset and reduce construction. effect of load

Active Publication Date: 2009-05-06
CHINA RAILWAY FIRST GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 constructio...

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

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Embodiment Construction

[0033] As shown in Figure 1 and Figure 2, the large-span asymmetric section cable-stayed bridge constructed by the present invention is a single-tower double-cable-plane asymmetric reinforced concrete cable-stayed bridge, and the hole-span arrangement position of this cable-stayed bridge is 208m+270m+35m +30m and its main span is 270m. That is to say, the distance between the cable tower 1 arranged on the side span pier and the left side span side pier 5 is 208m, and the distance between the cable tower 1 and the right main span side pier 7 is 270m. The distance between the main span side pier 7 and the abutment 13 on the right side is 35m+30m, and a pier 14 is also arranged between the main span side pier 7 and the abutment 13, between the main span side pier 7 and the abutment 14 The distance between the pier 14 and the abutment 13 is 30m. The main span beam section that has been constructed has been erected between the main span side pier 7 and the abutment 13, and the sid...

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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 balance weight, 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 ...

Claims

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Application Information

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IPC IPC(8): E01D21/00E01D11/04
Inventor 符照星徐永祥赵斌田晓东薛永刚梁鹏闫永涛李本良马凌冲
Owner CHINA RAILWAY FIRST GRP CO LTD
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