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Control method for synchronous construction survey of pylons and beams of cable-stayed bridge

A technology of simultaneous construction and measurement control, applied in cable-stayed bridges, bridges, bridge forms, etc., can solve the problems of difficult tower column construction, difficult to ensure the straightness of the tower column, uneven tower column receiving, etc., to reduce the Record the probability of calculation errors, the effect of easy operation and simple process

Active Publication Date: 2011-11-23
THE SECOND OF CHINA RAILWAY PORT CHANNEL ENG GROUP +1
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AI Technical Summary

Problems solved by technology

[0005] When the tower-beam synchronous construction technology is adopted, the weight of the main girder on both sides of the tower column is not completely equal, the temporary load on the bridge face is unbalanced, the oil pressure gauge for tensioning the cable to control the cable force, and the error of the tensioning system cause the tower to lose weight. If the column is subjected to uneven horizontal force, the tower column is likely to have a large deviation, which will cause great difficulties for the construction of the subsequent tower column segment, and it is difficult to ensure the straightness of the tower column. Therefore, for the synchronous construction of the tower beam The new construction technology should also adopt corresponding measurement and control methods to make the subsequent construction of the tower column straight

Method used

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  • Control method for synchronous construction survey of pylons and beams of cable-stayed bridge
  • Control method for synchronous construction survey of pylons and beams of cable-stayed bridge
  • Control method for synchronous construction survey of pylons and beams of cable-stayed bridge

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Embodiment Construction

[0024] This embodiment is a cable-stayed bridge with three towers, the two main spans are 616 meters, and the main bridge layout is (90+160+616+616+160+90)m. Among them, piers 3#, 4#, and 5# are the main tower piers, and pier 5# is used as an example to carry out simultaneous tower beam construction. The central mileage of pier 5# is K12+458.323m, the height of the tower column is 206m, and the elevation of the tower bottom is +13.5m , the elevation of the top of the tower is +219.5m. The entire tower is divided into four parts: the lower column, the beam, the middle column and the upper column; the height of the lower column is 34m, the height of the middle column is 110.5m, and the height of the upper column is 61.5m. Constrained by the construction period, the construction technology of simultaneous tower and beam construction is proposed to be used in the construction of the 5# tower column pier top section (about ten sections).

[0025] 1. Measuring instruments and equip...

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Abstract

The invention relates to a control method for synchronous construction survey of pylons and beams of a cable-stayed bridge. The control method comprises the following steps of: erecting high-precision total stations on forced centering observatories of pylons, which are arranged on two sides of a bridge, for observing monitoring points embedded on side walls of segments of the constructed pylon to obtain deflection of the monitoring points; further obtaining a deviation mathematical model of the constructed segments according to the deflection of the monitoring points; and then calculating the correction data of positioning of segments to be poured according to the deviation mathematical model of the constructed segments. The control method has the advantage of conveniently carrying out accurate positioning on the pylons and cable ducts, and is applied to the field of the cable-stayed bridge.

Description

technical field [0001] The invention relates to a cable-stayed bridge, in particular to a method for measuring and controlling synchronous construction of a cable-stayed bridge tower and girder. Background technique [0002] Cable-stayed bridge, also known as cable-stayed bridge, is a bridge in which the main girder is directly pulled on the tower column by many cables. a structural system. It can be regarded as a multi-span elastically supported continuous beam with cables instead of piers. It can reduce the bending moment in the beam body, reduce the height of the building, reduce the weight of the structure, and save materials. A cable-stayed bridge consists of tower columns, main girders, and cable-stayed cables. Cableway tubes are installed on both sides of the tower body and the main beam along the bridge, and the stay cables pass through the cableway tubes and are fixed on the anchor plates of the tower body and the main beam by anchoring devices. The cable-stayed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D11/04
Inventor 杨学军倪勇林世发邓刚卢鹏朱龙伍文雄张健其杨杰黎科
Owner THE SECOND OF CHINA RAILWAY PORT CHANNEL ENG GROUP
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