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Large-span bridge beam end telescopic structure suitable for high-speed maglev traffic

A telescopic structure and large-span technology, applied in bridges, bridge parts, bridge construction, etc., can solve problems such as difficult gap control, achieve good force transmission performance, solve stator gap overrun, and ensure longitudinal stability and displacement consistency Effect

Pending Publication Date: 2021-07-09
CHINA RAILWAY DESIGN GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-speed maglev stator has strict clearance requirements, and releasing the stator displacement will make the clearance more difficult to control, so the railway telescopic regulator structure cannot be used to solve the above problems

Method used

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  • Large-span bridge beam end telescopic structure suitable for high-speed maglev traffic
  • Large-span bridge beam end telescopic structure suitable for high-speed maglev traffic
  • Large-span bridge beam end telescopic structure suitable for high-speed maglev traffic

Examples

Experimental program
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Effect test

Embodiment

[0028] Taking the main bridge with a temperature span of 200m as an example, the design beam gap is 200mm, and the maximum temperature change range of the beam body affected by the external environment is ±20°C. The maximum expansion and contraction of the main bridge end affected by temperature is ±40mm, and the variation range of the beam gap is 160mm~240mm. The stator clearance requirement of 90~100mm at the joint position between the main bridge and the approach bridge cannot be met, and a telescopic structure at the end of the beam needs to be installed.

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PUM

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Abstract

The invention discloses a large-span bridge beam end telescopic structure suitable for high-speed maglev traffic, and the structure comprises a front-end track beam, a plurality of middle track beams and a rear-end track beam which are arranged in sequence; the lower portions of the middle track beams are connected with the main bridge through movable supports. The front-end track beam, the middle track beam and the rear-end track beam are connected in series through elastic devices; the front end of the front-end track beam is connected with an approach bridge through a fixing support, and the tail end of the rear-end track beam is connected with a main bridge through a fixing support. The invention has the beneficial effects that the elastic device and the movable support are arranged between the track beams of the main bridge, so that the beam end large displacement of a large-span bridge caused by temperature change can be converted into a plurality of uniform small displacements between the track beams in a telescopic structure, and the problem of stator gap overrun is solved; meanwhile, the good force transmission performance is achieved between the track beams, and the longitudinal stability and displacement consistency of the telescopic structure can be guaranteed.

Description

technical field [0001] The invention belongs to the field of maglev transportation, and in particular relates to a telescoping structure of a beam end of a large-span bridge suitable for high-speed maglev transportation. Background technique [0002] As a point-to-point large-capacity transportation tool, the high-speed maglev transportation system has many advantages such as high speed, safety and comfort, energy saving and environmental protection, etc. It can compete with high-speed rail and civil aviation, cooperate with each other, and promote each other, filling the gap in the operation speed of the three-dimensional transportation system. It will bring certain challenges to the development of traditional transportation methods, form a new market structure, and become a landmark project to promote the construction of a powerful transportation country. [0003] The high-speed maglev transportation system uses a certain length of stator installed on both sides of the tra...

Claims

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Application Information

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IPC IPC(8): E01D19/06E01D19/12E01B25/30
CPCE01B25/305E01D19/06E01D19/12
Inventor 伍卫凡王健胡叙洪徐平伟
Owner CHINA RAILWAY DESIGN GRP CO LTD
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