Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Method for main arch closure of three-span hinged arch bridges by adoption of pre-descended and pre-deflected side-span steel trusses

A technology of supported arch bridges and steel truss girders, applied in bridges, bridge construction, erection/assembly of bridges, etc., can solve problems such as complex stress on the structural system, large tonnage of overall beam shifting, weak overall stability, etc., and achieve saving and adjustment The time spent by Suo Suo, ensuring the stress-free closure of the bridge, and the effect of ensuring stability and safety

Active Publication Date: 2015-09-30
CCCC SECOND HARBOR ENG +2
View PDF4 Cites 15 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them (1) adjusting the cable force of the cable-stayed buckle-hanging system often increases the cable force, increases the risk, and greatly increases the construction period; The buckle-hanging cooperation system, the structural system is complex in force, the overall stability is weak, and the tonnage of the overall moving beam is also large, and the construction risk is high

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for main arch closure of three-span hinged arch bridges by adoption of pre-descended and pre-deflected side-span steel trusses
  • Method for main arch closure of three-span hinged arch bridges by adoption of pre-descended and pre-deflected side-span steel trusses
  • Method for main arch closure of three-span hinged arch bridges by adoption of pre-descended and pre-deflected side-span steel trusses

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0026] Such as Figure 1-3 As shown, the present invention provides a method for closing the main arch of a three-span hinge-supported arch bridge with pre-declination and pre-deviating side-span steel truss girders, comprising the following steps:

[0027] Step 1: Pouring the side piers 1 with side spans on both sides, reserve a post-casting section at the top of the side piers 1, and set a fixed hinge support 13 on the main pier 2 of one side span, and the other side span The main pier 2 is provided with a movable hinge support 4, and a temporary pier 3 is arranged between the side pier 1 and the main pier 2 of the two side spans respectively;

[0028] Step 2: erect side-span steel truss girders 10 on the side pier 1 and the temporary pier 3, so that the side-span steel tr...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for main arch closure of three-span hinged arch bridges by adoption of pre-descended and pre-deflected side-span steel trusses. The method includes the steps: pouring side piers of two side spans, reserving post-pouring sections at the top of the side piers, and arranging temporary piers between each side pier and a main pier; enabling one side span steel truss to deflect towards a midspan direction by a pre-deviation distance in initial erection, enabling the two side span steel trusses to descend at the positions of the side piers by a pre-descending distance, and when the steel trusses are erected to the main pier, fixing fixed hinge supports on one side while temporarily fixing movable hinge supports on the other side, and adopting a first jack to jack the steel trusses to separate from the temporary piers; hoisting and erecting the steel trusses to a main arch closure position, and enabling the first jack to jack the steel trusses so as to realize main arch closure; unfixing the movable hinge supports, enabling the first jack to jack the steel trusses to a standard height, pouring the side piers, and freeing the first jack. The method has the advantages that safety and precision in main arch closure are achieved without adjustment of cables or monolithic movement of main truss arches, and accordingly construction risks are reduced while construction period is shortened.

Description

technical field [0001] The invention belongs to the technical field of bridge construction, and relates to a method for closing the main arch of a three-span hinge-supported arch bridge, in particular to a method for realizing the height of the main arch by adopting pre-dropping and pre-deviating side-span steel girders for a three-span hinge-supported arch bridge. The construction method of precision stress-free closure. Background technique [0002] Steel truss arch bridges are very complex in structure and stress. When the main arch is closed, there are many closing points and many influencing factors. It is difficult to construct and control the stress-free closing. At present, the conventional closing construction method for the construction of three-span hinged bearing arch bridges is as follows: steel girders are erected from the side span to the mid-span, and to the mid-span closing, the side spans are erected with temporary piers, and the mid-span is erected by the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/08
Inventor 张永涛周仁忠田唯游新鹏杨炎华刘丹彭成明程多云刘颖刘占国
Owner CCCC SECOND HARBOR ENG
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com