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High-speed railway settlement monitoring technology

A high-speed railway and settlement monitoring technology, which is applied in the field of surface settlement monitoring along high-speed railways and deformation monitoring in banded areas, can solve the problems that settlement monitoring cannot be performed, and achieve the effect of improving reliability and accuracy

Inactive Publication Date: 2012-11-07
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

However, because high-speed railways often cross vegetation-covered areas or farmland areas, it is difficult to obtain effective and sufficient natural PS in these areas, making settlement monitoring in these areas impossible to perform

Method used

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  • High-speed railway settlement monitoring technology

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Experimental program
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Embodiment Construction

[0011] figure 1 The middle part is a free connection network, dots represent scatterer points, connecting lines represent network arcs, and thick curves represent high-speed railways (the main monitoring target). The hybrid network is constructed by combining natural permanent scatterers (PS) with artificial corner reflectors (CR) landmarks; the hybrid network adopts the free connection method to construct the network, and the geometric distance between adjacent scatterers is not more than 1 km; based on the multi-temporal height Resolution short-wavelength satellite SAR images, using time-series differential radar interferometry technology to extract subsidence information. The layout of artificial CR points is divided into two situations: fixed corner reflectors are arranged along the high-speed railway, and mobile split corner reflectors are arranged in areas such as farmland, vegetation coverage, green belts and water areas.

[0012] The artificial CR is made of aluminum,...

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Abstract

The invention discloses a high-speed railway settlement monitoring technology. A satellite time sequence differential radar interference technology is used for monitoring the settlement change of a high-speed railway. Natural permanent scatterers (PS) are matched with artificial corner reflectors (CR) to construct a mixed scatterer network; the satellite time sequence differential radar interference technology adopts satellite SAR images with multiple time phases, high resolution and short wavelength; and the mixed scatterer network is constructed by adopting a free connection method. The method of the invention can solve the problem of settlement monitoring in vegetation-covered areas or farmland areas where effective natural PS can not be easily obtained generally. The time sequence differential radar interference technology based on the mixed scatterer network can ensure the reliability and the accuracy of settlement monitoring of the high-speed railway. Fixed and split artificial corner reflectors are arranged simultaneously, thereby ensuring the success rate of settlement monitoring in vegetation-covered areas and farmland areas, saving the land area and reducing the monitoring cost of the artificial corner reflectors.

Description

Technical field [0001] The invention belongs to the field of deformation monitoring in banded areas, in particular to the technical field of surface settlement monitoring along high-speed railways. Background technique [0002] The high-speed railway has the characteristics of extremely fast operation, which puts forward high requirements on the geographical environment and geological conditions along the line, especially the stability of the roadbed and bridges is particularly important. However, affected by natural or human factors (such as excessive exploitation of groundwater), surface subsidence will occur along and around the railway; the high-speed operation of the train and its vibration will put pressure on the roadbed and bridges, which will cause deformation of roadbeds, bridges and other structures (especially settlement). The settlement caused by these internal and external factors will directly affect the safe operation of high-speed trains. Therefore, it is v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D33/00E02D1/08G01S13/89
Inventor 刘国祥顾利亚赵国堂岑敏仪张同刚刘成龙张献州贾洪果张瑞于冰
Owner SOUTHWEST JIAOTONG UNIV
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