Large-span self-anchored steel box girder suspension bridge track lofting and measuring method

A measurement method, self-anchored technology, applied in the direction of height/level measurement, track, measuring instrument, etc., can solve the problems of high risk factor and difficult construction of cross-river bridge, so as to ensure accuracy and reduce data conversion error Effect

Active Publication Date: 2020-05-15
中铁十五局集团路桥建设有限公司 +1
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The construction of the subway long-span river-crossing bridge is difficult and the risk factor 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
  • Large-span self-anchored steel box girder suspension bridge track lofting and measuring method
  • Large-span self-anchored steel box girder suspension bridge track lofting and measuring method
  • Large-span self-anchored steel box girder suspension bridge track lofting and measuring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] The present invention will be specifically introduced below in conjunction with the accompanying drawings and specific embodiments.

[0043] The track lofting and measurement method of the long-span self-anchored steel box girder suspension bridge, the bridge includes the main bridge and the approach bridges at both ends, and the tower columns supporting the main bridge are arranged at the two ends of the main bridge, including the following steps:

[0044] S1. Elevation control and reference: the elevation is controlled with the tower column as the reference, the approach bridge is controlled by the absolute elevation, the main bridge is controlled by the structural thickness relative to the tower column, and the joint between the main bridge and the approach bridge is controlled by the absolute elevation;

[0045] S2. According to the CPⅡ control point, stake out the control base mark of the track line along the beam surface, the control base mark, including the plane ...

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 large-span self-anchored steel box girder suspension bridge track lofting and measuring method. The method comprises the steps: controlling elevation with a tower column as the benchmark; conducting lofting along a girder surface to control a base mark, and conducting lofting along the center line of a track line to densify the base mark; obtaining the influence of the girder surface temperature on the elevation, determining a concrete pouring time period according to the influence, and formulating an elevation temperature fitting line; formulating an elevation load fitting line according to the load of later construction; correcting the actually measured surface line shape of the large bridge by using the elevation temperature fitting line, the elevation load fitting line and the track structure design height to obtain a track laying fitting line shape; calculating the structural thickness of the ballast bed according to the height difference between the railsurface and the girder surface, and then laying the ballast bed; erecting track panels section by section, and then laying a track. By arranging the encryption base mark, elevation measurement is facilitated, the stable line type of the bridge is conveniently determined, and measurement control in construction is facilitated; in the track arranging process, a relative elevation difference value fixed control method is used for correction again, and the problem that bridge deck track laying is affected due to the fact that the bridge deck elevation is dynamically changed all the time is effectively solved.

Description

technical field [0001] The invention relates to a track setting out and measuring method, in particular to a track setting out and measuring method of a large-span self-anchored steel box girder suspension bridge, belonging to the technical field of steel box girder suspension bridge measurement construction. Background technique [0002] At present, most of the railway bridges at home and abroad use concrete structures and a few steel structures. The railway suspension steel structure bridge was first applied in the Jinsha River Bridge in 2017, but the bridge adopts a ballasted track structure, and mainly uses steel box girders combined with concrete girders. The ballastless track suspension bridge with load-bearing structure is firstly applied in the Chongqing track loop crossing the Yangtze River of the present invention. [0003] The construction of the long-span river-crossing subway bridge is difficult and has a high risk factor. In addition, due to the unbroken shipp...

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): E01B35/00E01D21/00G01C15/00G01C5/00
CPCE01B35/00E01D21/00G01C5/00G01C15/00
Inventor 任化庆尤志浩段玉顺陈延军秦洪飞王鹏范先知郇培东文德李海洋曹刚李科
Owner 中铁十五局集团路桥建设有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap