High-speed railway settlement monitoring technology

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...

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