Stay cable construction tensioning method

A cable-stayed cable and cable-stayed beam technology, which is applied to the construction of cable-stayed bridges, can solve the problems of long construction period, high cost, waste of labor and machinery, etc., and achieve the effects of fewer construction procedures, improved construction efficiency, and accelerated construction progress.

Active Publication Date: 2020-07-03
CHINA SHANXI SIJIAN GRP
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  • Claims
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Problems solved by technology

Generally speaking, the construction period is long, and labor machinery is wasted, and the cost is high

Method used

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  • Stay cable construction tensioning method
  • Stay cable construction tensioning method
  • Stay cable construction tensioning method

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Embodiment Construction

[0020] The content of the present invention will be described below in conjunction with specific embodiments.

[0021] 1. Construction preparation

[0022] A. Cable stays approaching the site: The cable supply plan should take into account the installation progress on site and the actual stacking capacity on site. In principle, the number of cables stacked on the bridge deck should not be less than one cable number and be stored under the main tower to prevent the weight of the cables from affecting the load control of the main bridge during construction. Others are piled up nearby at the construction site.

[0023] Special slings are used for transportation and hoisting (single load bearing 10 tons), and 3 lifting points are set along the periphery of the cable during hoisting, so that the cables are evenly stressed and ensure that the stay cables PE are not damaged.

[0024] B. Construction equipment layout: such as figure 1 As shown, after the construction conditions ar...

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Abstract

The invention relates to a cable-stayed bridge construction method, and provides a stay cable construction tensioning method in order to shorten the construction time of a cable-stayed bridge, improvethe construction efficiency and reduce the construction cost. After construction of a main tower and a girder is completed, stay cables are installed and constructed; the stay cables are sequentiallyinstalled through the combination of a tower crane, a truck crane and winch equipment, and first-time tensioning is conducted; and a temporary steel pipe support is removed under the bridge to complete system conversion, then all accessory structures such as bridge deck pavement and guardrails are constructed, when the total load of a bridge deck is basically in place, secondary cable force tensioning of the stay cable is started, and the tensioning force reaches a designed load value to complete the construction of the whole cable-stayed bridge. Under the condition that the design requirements of the cable-stayed bridge are completely met, one tensioning construction link is omitted, the construction period is 20 days ahead of time, and the construction cost is reduced by 24.80 thousandyuan. Manpower and equipment investment is saved, the construction progress is accelerated, the construction efficiency is improved, and the method is worthy of vigorous popularization. The labor productivity is improved, the engineering quality is ensured, and benefits are created for enterprises.

Description

technical field [0001] The invention relates to a construction method of a cable-stayed bridge, in particular to a construction tensioning method of a cable-stayed bridge. Background technique [0002] The main bridge span of the cable-stayed bridge constructed by the applicant is 130+130m and the total length is 260m. It is a cable-stayed bridge with single tower and double cable plane composite girder. like figure 2 , 3 As shown, the whole bridge is equipped with 44 stay cables, and the cable distance layout is: 12+10×10.5+2×13+10×10.5+12m. There are 22 cables on each side, arranged symmetrically, and there are 11 stay cables on each side of the main girder. At present, the conventional method of cable-stayed bridge construction is to adopt a three-stage tensioning method, that is, the first tensioning after the installation of the cable-stayed cables, the second tensioning adjustment after the removal of the brackets, and the third tensioning of the bridge deck after t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D19/16E01D11/04
CPCE01D11/04E01D19/16E01D21/00
Inventor 王续东王能静刘勇庆赵文原晓峰
Owner CHINA SHANXI SIJIAN GRP
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