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An intelligent monitoring method for expansion joints of long-span high-speed rail bridges

A technology of intelligent monitoring and expansion joints, applied in bridges, bridge construction, bridge parts, etc., can solve the problems of reduced stiffness and strength, shortened service life, etc., and achieve the effect of ensuring accuracy

Active Publication Date: 2021-12-03
SOUTHEAST UNIV
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Problems solved by technology

During the normal service period of long-span high-speed rail bridges, the structure at the expansion joints will be affected by factors such as climate, acid rain corrosion, natural aging and oxidation, and the stiffness and strength will decrease with time, shortening its service life

Method used

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  • An intelligent monitoring method for expansion joints of long-span high-speed rail bridges
  • An intelligent monitoring method for expansion joints of long-span high-speed rail bridges
  • An intelligent monitoring method for expansion joints of long-span high-speed rail bridges

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Embodiment Construction

[0034] The present invention will be described below in conjunction with the accompanying drawings.

[0035] The first step is to build a hardware platform. According to the design information and site conditions, determine enough measuring points on the components at the expansion joints, and arrange sensors, including temperature sensors, humidity sensors, strain sensors, displacement sensors, acceleration sensors, and wind speed and direction instruments. The expansion joint structure of long-span high-speed rail bridges generally includes track expansion devices for point rails and basic rails, movable steel sleepers, support beams and displacement distribution devices, such as figure 2 shown. This implementation method is explained in conjunction with the track expansion device, movable steel sleeper, support beam and displacement distribution device of the tip rail and the basic rail, but the method described in this article is not limited to the structure type of the ...

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Abstract

The invention discloses an intelligent monitoring method for expansion joints of large-span high-speed railway bridges. On the basis of long-term monitoring of expansion joints of large-span bridges, the technology of machine learning is introduced to establish environmental load parameters, train load parameters and expansion joints respectively. The mapping relationship between the structural responses at different locations can be predicted, and the structural responses of the expansion joints under the two excitations can be predicted, and the working state of the expansion joints can be grasped in real time, so as to improve the operational safety of long-span high-speed rail bridges. Compared with the existing expansion joint monitoring technology, the present invention improves the timeliness and accuracy of the early warning of the abnormal service state of the expansion joint by introducing machine learning and evaluation indicators. The intelligent monitoring method for expansion joints in the present invention can bring great value to the safe operation of high-speed rail bridges.

Description

technical field [0001] The invention relates to an intelligent monitoring method for expansion joints of long-span high-speed rail bridges, in particular introducing machine learning and evaluation indicators into the monitoring of expansion joints of long-span bridges, and belongs to the field of health monitoring of high-speed rail bridges. Background technique [0002] With the rapid development of my country's high-speed railway industry and the continuous improvement of construction technology, the number and span of railway bridges are constantly being refreshed. As of the end of 2019, my country's existing high-speed rail mileage is 29,000 kilometers, ranking first in the world, accounting for 2 / 3 of the world's total mileage of high-speed rail, of which the length of bridges accounts for more than half of the total length of the line, and Shanghai-Hangzhou high-speed rail accounts for 90%. above. [0003] Compared with ordinary trains, high-speed trains have higher r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M5/00G01D21/02E01D19/06
CPCE01D19/06G01D21/02G01M5/0008G01M5/005G01M5/0066
Inventor 王浩郎天翼茅建校祝青鑫胡所亭赵欣欣
Owner SOUTHEAST UNIV
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