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Variable-truss high-steel-truss continuous beam with varying lower chord curve

A curved and lower chord technology, applied in the field of variable-height steel truss continuous girders, can solve problems such as not meeting the design requirements of new bridges, achieve reasonable force, reduce investment, and save steel

Inactive Publication Date: 2016-08-17
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In summary, the conventional steel truss girder structure and deck system do not meet the design requirements of new bridges, so it is urgent to study a new type of steel truss continuous girder

Method used

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  • Variable-truss high-steel-truss continuous beam with varying lower chord curve

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] refer to figure 1 , figure 2 and image 3 , the vertical and horizontal beam structure of variable truss and high steel truss continuous girders with varying lower chord curves of the present invention is composed of left main trusses, right main trusses, cross-links and bridge deck systems. refer to figure 1 , the left main truss and the right main truss are composed of upper chord 1 , lower chord 2 , vertical web 3 and diagonal web 4 . The line shape of the upper chord 1 of the left main truss and the right main truss is a straight line, and the line shape of the lower chord 2 is composed of a left line and a right line symmetrical along its vertical center line, and the left line is 1. The right line shape is composed of a straight line segment 21, a transition segment 22 and a curved segment 23, wherein the curved segment 23 is a quadrat...

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Abstract

The invention relates to a variable-truss high-steel-truss continuous beam with a varying lower chord curve in order to effectively solve the design problems of a long-span bridge with the upper space and the lower space being limited at the same time. The variable-truss high-steel-truss continuous beam is composed of a left main truss, a right main truss, a lateral combination and a bridge floor system. The left main truss and the right main truss are composed of an upper chord, a lower chord and web members distributed between adjacent joints. The upper chord of the left main truss and the right main truss is in a straight line type; and the line type of the lower chord of the left main truss and the right main truss is composed of straight line sections, transition sections and curve sections, and each curve section is a quadratic parabola extending downwards. The bridge floor system is composed of transverse beams and longitudinal beams, the longitudinal beams of the whole bridge are continuous, and transverse beams at the curve sections are stiffened transverse beams composed of the transverse beams, stiffening transverse rods and stiffening inclined rods.

Description

technical field [0001] The invention relates to bridges, in particular to a variable-height steel truss continuous girder with varying lower chord curves. Background technique [0002] The Leshan-Guiyang section of the newly-built railway Chengdu-Guiyang line starts at Leshan Station and ends at Guiyang North Station, including related supporting projects in the Leshan area and Guiyang hub. Among them, the construction length of Leshan-Guiyang Dongzheng Line is 519.363km. This line is a high-speed passenger dedicated line with a target speed of 250km / h. The Caiba Minjiang River Bridge is one of the "Five Bridges and One Tunnel" of the Chenggui Line, which spans the Minjiang River. The design of this bridge is controlled by navigation, airport and other factors. The waterway of the Minjiang River is classified as Ⅲ-(3), with a maximum navigable water level of 283.82m, a clear height of 18m, and a clear width of 200m; the height limit for aviation is 332.2m, and the height ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D6/00E01D101/30
CPCE01D6/00E01D2101/30
Inventor 鄢勇向律楷陈建峰袁明马庭林李锐滕炳杰张志勇郭占元袁蔚
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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