Demolition construction method for long-span highway suspension bridges

A construction method and large-span technology, applied in bridges, bridge maintenance, bridge reinforcement, etc., can solve the problems of technical difficulty and high risk of construction, and achieve the effect of shortening the demolition period, controllable safety risks, and smooth surface

Active Publication Date: 2017-07-25
GUIZHOU BRIDGE CONSTR GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] For a complex bridge type such as a long-span suspension bridge, its demolition construction has no precedent in China, and the construction technology is difficult and risky

Method used

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  • Demolition construction method for long-span highway suspension bridges
  • Demolition construction method for long-span highway suspension bridges
  • Demolition construction method for long-span highway suspension bridges

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Embodiment Construction

[0034] The present invention will be further described below in conjunction with the drawings and embodiments, but it is not a basis for limiting the present invention.

[0035] The embodiment of the present invention: a construction method for dismantling a large-span highway suspension bridge, the construction method specifically includes the following steps:

[0036] A. The steel structure reaction frame is installed on the top of the main tower, and the cable saddle is pushed to correct the deviation of the main tower;

[0037] B. Cut the bridge deck and the bridge deck paving layer, and hoist it in blocks;

[0038] C. Removal of steel truss beam: After cutting the steel truss beam from the middle of the span, it is lowered into sections as a whole;

[0039] D. Demolition of the main cable: use the remaining main cable suspension and catwalk as the operating platform to cut and remove it on the spot;

[0040] E. Demolition of the main tower: use a diamond wire saw to cut reinforced c...

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Abstract

The invention discloses a demolition construction method for long-span highway suspension bridges. The construction method specifically comprises the following steps that 1, steel structure counter-force frames are installed at the top of a main tower, cable saddling and pushing are conducted, and the deflection of the main tower is corrected; 2, bridge surface plates and bridge surface paving layers are cut, and blocking and whole hoisting are conducted; 3, demolition of steel truss beams is conducted, and after the steel truss beams are cut off from the midspan, the beams are lowered in a segmental mode as a whole; 4, demolition of main cables are conducted, remaining main cable hangings and catwalks are utilized as an operation platform, the main cables are cut off in situ, and the demolition of the main cables is conducted; 5, demolition of the main tower is conducted, diamond wire saws are utilized to cut reinforced concrete with static force, upper cross beams are lowered as a whole through the adoption of a suspension system, after the main tower is cut and divided into blocks, vehicle cranes are used for hoisting, and cutting and hoisting are conducted after holes are drilled in lower cross beams. The demolition construction method for the long-span highway suspension bridges is applicable to the complex demolition of suspension bridges in geological environment, and the construction method is not only relatively little in resource waste and relatively low in economic cost, but also conductive to environmental protection.

Description

Technical field [0001] The invention relates to a construction method for dismantling a large-span highway suspension bridge, which belongs to the technical field of bridge construction. Background technique [0002] Suspension bridge is currently the most capable bridge type in the world. It originated in China, innovated in Britain, and developed in the United States and Japan. Due to the complex structure of the suspension bridge, its construction technology is also difficult. The construction of modern suspension bridges in my country started relatively late. Before the 1990s, only a few suspension bridges with small spans, narrow widths and low load standards were built. After the 1990s, my country’s modern suspension bridges have developed rapidly. During the year, more than a dozen large-span suspension bridges with their own characteristics were built, such as the Shantou Bay Bridge and the Xiling Yangtze River Bridge. Since the construction of suspension bridges in our ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D24/00
CPCE01D22/00
Inventor 杨裕成谭文鹏陈永刚李忠李勇
Owner GUIZHOU BRIDGE CONSTR GROUP
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