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

Method for controlling changes in three-truss height difference of combined highway and railway bridge for structural system

A road-rail dual-purpose bridge and a control method technology, which is applied in the direction of bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of lack of very mature technical means, increase of main truss support reaction force, and excessive stress on main girder nodes. Large and other problems, to achieve the effect of preventing the height difference of the three trusses from being too large, preventing local stress concentration, and controlling the change of internal force

Inactive Publication Date: 2016-10-05
CHINA TIESIJU CIVIL ENG GRP CO LTD +1
View PDF5 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The three-truss structure bears complex forces, the space effect is obvious, the load sharing ratio of the middle and side trusses is different, the force of the middle truss is obviously greater than that of the side trusses, and it is difficult to ensure that the height of the three trusses is exactly the same during the construction process
The increase of the reaction force of a single main truss will easily cause the local stress of the main beam joints to be too large, and cause a huge safety risk to the lower support system
At the same time, if the construction is controlled by the single-piece main truss with a large internal force, the strength of the other two main truss members will not be fully utilized, resulting in waste of materials
The control of the height difference of the three trusses is very important for bridge construction, but there is still no very mature technical means for this

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 controlling changes in three-truss height difference of combined highway and railway bridge for structural system
  • Method for controlling changes in three-truss height difference of combined highway and railway bridge for structural system
  • Method for controlling changes in three-truss height difference of combined highway and railway bridge for structural system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0025] Referring to the accompanying drawings, the method for controlling the structural system of the three-girder height difference of the road-rail dual-purpose bridge includes the following construction steps:

[0026] Complete the erection of brackets 2 next to each main pier in the early stage of construction, check the elevation of the pre-embedded plate at the top of the pier and the top plate of bracket columns with a level gauge, control the height difference of the support of the slideway beam 3, and then complete the hoisting of the three-truss slideway beam 3 in sequence , both ends of the slideway beam 3 are connected to the top of the bracket column, and the middle part is connected to the embedded plate of the pier top, and the section of the slideway beam changes within the range of the pier top. During the hoisting process, the elevation of the top of the slideway beam 3 is monitored to strictly control the slide The vertical height difference of the single gi...

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 controlling changes in three-truss height difference of combined highway and railway bridge for a structural system. Slide beams and slides are precisely hoisted before construction of a main bridge, and a three-truss height difference of lower bearing structures of steel trusses is controlled within 10 mm. The impact of the three-truss height difference upon the main bridge is analyzed by using finite element software analysis according to a design scheme and field initial data, and a safety limit of the three-truss height difference under various construction conditions is calculated; after each pushing, slider reversing is performed and point reading is redone according to field calculated elevations, and the three-truss height difference is precisely controlled within 1 mm; the bottom of each steel beam is contacted with sliders through elastic rubber pads, limiting relative vertical displacement of three main trusses during pushing and dynamically controlling the three-truss height difference. In the method, a three-truss large-span steel truss bridge is constructed by using a three-truss height difference control system, and the method is highly operable, convenient to construct, safe and reliable, economic and reasonable and is worthy of popularization in the construction of multi-main-truss large-span steel bridges.

Description

technical field [0001] The invention relates to the technical field of construction of long-span rigid truss girder bridges, and specifically belongs to a method for controlling the structural system of the height difference of the three trusses of road-rail dual-purpose bridges, and is mainly used in the erection and jacking construction stages of long-span continuous steel truss girder bridges. Internal force adjustment. Background technique [0002] With the in-depth advancement of my country's railway construction by leaps and bounds, rigid suspension cable-stiffened steel truss bridges, as novel long-span road-rail bridge structures, are The advantages such as beautiful appearance have become an important development direction in the construction of railway bridges. At present, there are two bridges with this structure in China, namely Dongguan Dongjiang Bridge and Jinan Yellow River Bridge. Dongguan Dongjiang Bridge is a (112+208+112) m double-layer highway bridge, er...

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): E01D21/00
CPCE01D21/00
Inventor 方继梁崇双伍军张时利聂宗泉王雨舟丁仕洪曹晗邢文彬伍超然阮蔚平
Owner CHINA TIESIJU CIVIL ENG GRP CO LTD
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