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Wide span variable girder high continuous steel truss bridge cantilever erection mid-span closure construction method

A steel truss girder bridge and large-span technology, applied in bridge construction, erection/assembly of bridges, bridges, etc., can solve the problems of infeasible river channels, inability to set up lifting equipment, and stress buckling of rods required for navigation, and achieve large The effect of promoting value, reducing construction difficulty and risk, and reducing adjustment range

Inactive Publication Date: 2016-09-21
STEEL STRUCTURE CONSTR CO LTD OF CHINA TIESUU CIVIL ENG GRP
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  • Claims
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Problems solved by technology

[0006] 2. The self-weight of the steel truss girder is relatively large, and the maximum support reaction force reaches 28973KN under the maximum cantilever state. The main pier lifting method needs to arrange complex lifting equipment on the main pier. In addition, under the action of the large support reaction force, some poles Parts will generate large stress and local buckling
[0007] 3. Since the Helongkou is located directly above the main channel, it is not feasible for rivers with navigation requirements, and it is impossible to install jacking equipment below the Helongkou

Method used

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  • Wide span variable girder high continuous steel truss bridge cantilever erection mid-span closure construction method
  • Wide span variable girder high continuous steel truss bridge cantilever erection mid-span closure construction method
  • Wide span variable girder high continuous steel truss bridge cantilever erection mid-span closure construction method

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Embodiment Construction

[0039] Referring to the accompanying drawings, a construction method for cantilever erection of a large-span variable truss-height continuous steel truss girder bridge, including the following construction steps:

[0040] 1) The side-span steel girder is erected with temporary buttress auxiliary semi-cantilever, the main span is erected with full cantilever assembly, cantilevered from both sides to the mid-span and closed in the mid-span of the main span;

[0041] 2) First, vertical and horizontal deviation correction devices 01 and vertical jack devices 02 are respectively arranged on the top of each permanent pier to adjust the steel beam vertically, horizontally and vertically;

[0042] 3) Secondly, according to the result of the closing gap deviation calculated by the finite element software, after the steel girder cantilever is erected to the two sections of the main span, the side pier and the main pier jack system 02 are used to jack up the steel girder to the predetermi...

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Abstract

The invention discloses a wide span variable girder high continuous steel truss bridge cantilever erection mid-span closure construction method. The method includes the steps: steel beams are lifted by a certain height in advance, an erection process is controlled, and pre-adjustment is performed after closure; a vertical deviation and the angle of a closure opening can be eliminated through the method that main piers of side pier falling beams are not erected; steel beam closure can be achieved through the method that the middle line of the bridge and a mileage deviation is adjusted by various main pier top deviation correction devices. The wide span variable girder high continuous steel truss bridge cantilever erection mid-span closure construction method can solve the problem of erection mid-span closure construction that the installation erection devices are not arranged under the closure opening in wide span steel truss mid-span closure.

Description

technical field [0001] The invention relates to the technical field of bridge construction, in particular to a construction method for cantilever erection of a large-span variable truss-height continuous steel truss girder bridge. Background technique [0002] As a structural type of long-span steel truss bridge, the variable truss-height continuous steel truss bridge has the advantages of large clearance under the bridge, clear structural force, novel design, and beautiful architectural shape. In the bridge of the river. At present, the construction methods for cantilever erection of long-span variable truss-height continuous steel truss bridges are mostly temperature difference method, integral jacking method, and closing jacking method. [0003] For a long-span variable truss-height continuous steel truss bridge (140+224+140) m, the lower chord is arranged at variable heights, the center distance of the main truss is 14 m, the height of the end of the side span and the m...

Claims

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Application Information

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IPC IPC(8): E01D21/10
CPCE01D21/10
Inventor 张庆发张建金聂宗泉李荣浩邢文彬刘欢齐斌
Owner STEEL STRUCTURE CONSTR CO LTD OF CHINA TIESUU CIVIL ENG GRP
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