Method for erecting large-span lower chord variable truss high continuous steel trussed beam cantilever

A technology of large-span and steel truss girders, applied in bridge construction, erection/assembly of bridges, bridges, etc., can solve problems such as the lack of navigation conditions for large-tonnage ships, achieve great promotion value, ensure quality, and concentrate assembly operations Effect

Inactive Publication Date: 2016-09-28
STEEL STRUCTURE CONSTR CO LTD OF CHINA TIESUU CIVIL ENG GRP
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  • Abstract
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Problems solved by technology

[0008] The purpose of the present invention is to provide a construction method for a continuous steel truss girder bridge with variable truss height and lower chord, which realizes cantilever erection on t

Method used

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  • Method for erecting large-span lower chord variable truss high continuous steel trussed beam cantilever
  • Method for erecting large-span lower chord variable truss high continuous steel trussed beam cantilever
  • Method for erecting large-span lower chord variable truss high continuous steel trussed beam cantilever

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Embodiment Construction

[0043] Referring to the accompanying drawings, a method for cantilever erection of a continuous steel truss girder with variable chord height and large span, includes the following construction steps:

[0044] 1) First, set up temporary steel truss-type assembled support 01 at the position of the side-span bridge on both sides, as a temporary support pier for the erection of side-span steel beams. The internodes are arranged continuously, and the temporary buttresses behind are arranged intermittently;

[0045] 2) Install a steel beam lifting device 02 near the side pier for vertical transportation of the bars and assembly of the first three internodes of the side span;

[0046] 3) The pier tops of the permanent piers, side piers and main piers are respectively arranged with a pier top layout system. The pier top layout system includes a vertical and horizontal deviation correction device 03 and a vertical jacking device 04, which are used to vertically and horizontally adjust...

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Abstract

The invention discloses a method for erecting a large-span lower chord variable truss high continuous steel trussed beam cantilever. Temporary buttresses are adopted in side-span steel beams to assist in semi-cantilever splicing and erection, and main-span full cantilever erection is conducted. The method specifically includes the steps that steel beam lifting stations are arranged at the positions of abutment piers, the temporary buttresses are arranged at the positions of corresponding joints of the side-span steel beams according to the main truss structure stress, the beams are lifted through the lifting stations and transported through a bridge floor, and an upper chord beam erection crane is used for erecting the steel beams joint by joint from the side span to the main span; and in the midspan closure process, the down-warping and the turning angle of the front end of a closure opening are adjusted through an abutment pier beam rising and falling method, and in combination with measures of longitudinal jacking and pulling of the steel beams and the like, the steel beams are closed with the high accuracy. By the adoption of the method for erecting the large-span variable truss high continuous steel trussed beam cantilever, the construction problem of striding over a river without a large-tonnage ship navigation condition and with a navigation requirement is solved.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and in particular relates to a cantilever erection method of a continuous steel truss girder with variable chord height and large span. Background technique [0002] As a structural type of long-span bridges, continuous steel truss bridges have the advantages of large spanning capacity, clear structural stress, novel design, and beautiful architectural shapes. They are often used in bridges spanning highways, railways, and long-span rivers. . At present, the construction methods of long-span continuous steel truss girder bridges are mostly two-way symmetrical cantilever assembly from the middle main pier, and with the help of external facilities such as suspension towers or mid-span temporary piers, the mid-span closing method is realized. According to its structural characteristics , environmental factors, boundary conditions, selection of construction auxiliary facilities and insta...

Claims

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Application Information

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IPC IPC(8): E01D21/10
CPCE01D21/10
Inventor 张庆发方继张建金李荣浩刘瑜曹晗丁仕洪申爱华张士宝江明慧张伟李亚飞刘欢夏云李富
Owner STEEL STRUCTURE CONSTR CO LTD OF CHINA TIESUU CIVIL ENG GRP
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