CN-121720420-B - Subway line deformation risk monitoring method and system based on InSAR technology

CN121720420BCN 121720420 BCN121720420 BCN 121720420BCN-121720420-B

Abstract

The application relates to the technical field of deformation monitoring, in particular to a subway line deformation risk monitoring method and system based on an InSAR technology, wherein the method comprises the steps of collecting surface height data of all permanent scatterers on a subway line to be monitored in real time so as to obtain settlement of the permanent scatterers at all moments; the method comprises the steps of obtaining a settlement synchronization value between any two permanent scatterers at each moment to obtain a settlement coefficient of each permanent scatterer, screening each settlement factor point, obtaining a contrast factor between each permanent scatterer and each settlement factor point, correcting the settlement coefficient of each settlement factor point, obtaining a settlement deviation weight and a settlement deviation coefficient of each permanent scatterer to obtain a ground settlement amount of each permanent scatterer, and predicting the ground settlement amount of each permanent scatterer at the next moment to monitor deformation risk of a subway line. The method aims to improve accuracy of subway line deformation risk assessment.

Inventors

WU YU
LI PENGLIN
HE XINCHENG
YU ZHANGUO

Assignees

中国港湾工程有限责任公司

Dates

Publication Date: 20260508
Application Date: 20260224

Claims (6)

1. The subway line deformation risk monitoring method based on the InSAR technology is characterized by comprising the following steps of: collecting the surface height data of each permanent scatterer on a subway line to be monitored in real time, thereby obtaining the settlement of each permanent scatterer at each moment; At each moment, obtaining a settlement synchronization value between any two permanent scatterers by comparing settlement amounts of the any two permanent scatterers, and fusing the settlement synchronization value with the settlement amounts of the permanent scatterers to obtain a settlement coefficient of each permanent scatterer; At each moment, through the distribution of the settlement amounts of all the permanent scatterers, each settlement factor point is screened from the permanent scatterers, the settlement deviation weight of each permanent scatterer is obtained through the difference of the settlement amounts of each permanent scatterer and the adjacent permanent scatterers, the settlement deviation coefficient of each permanent scatterer is obtained through the combination of the corrected settlement coefficient and the settlement amount of each permanent scatterer, and then the ground settlement amount of each permanent scatterer is obtained through fusion with the settlement amount of each permanent scatterer, so that the ground settlement amount of each permanent scatterer at the next moment is predicted, and the deformation risk monitoring is carried out on the subway line; the process for obtaining the contrast factor comprises the following steps: the settlement factor points are permanent scatterers with a preset proportion when all the permanent scatterers are arranged according to the settlement amount in a descending order; Recording the ratio of the settlement amount of each permanent scatterer to the settlement amount of each settlement factor point as the settlement amount ratio; the permanent scatterer farthest from each sedimentation factor point is marked as the farthest permanent scatterer of each sedimentation factor point, and the distance between each permanent scatterer and the farthest permanent scatterer of each sedimentation factor point is marked as a distance ratio compared with the ratio of the distance between each sedimentation factor point and the farthest permanent scatterer; when the settlement amount ratio is greater than or equal to the distance ratio, the contrast factor is assigned to 1, otherwise, the contrast factor is assigned to 0; the process for correcting the sedimentation coefficient of each sedimentation factor point comprises the following steps: taking the weighted sum of the settlement amount of each settlement factor point and the settlement coefficient before correction as the settlement coefficient of each corrected settlement factor point, wherein the weight of the settlement amount of each settlement factor point is the average value of the contrast factors between all other permanent scatterers and each settlement factor point; The settlement deviation weight is obtained through the following steps: calculating the difference of the settlement between each permanent scatterer and the nearest permanent scatterer in space; counting the maximum value of the settlement of each permanent scatterer and the settlement of the nearest permanent scatterer in space; the ratio of the difference quantity to the maximum value is recorded as a difference ratio; the sedimentation deviation weight is a difference value of 1 and the difference ratio; The settlement deviation coefficient is obtained through the following steps: And mapping the settlement amount of each permanent scatterer into a positive number, wherein the settlement deviation coefficient is the ratio of the difference between the product and the settlement amount of each permanent scatterer compared with the positive number.
2. The method for monitoring deformation risk of subway line based on InSAR technology as set forth in claim 1, wherein the process of obtaining the sedimentation synchronization value is as follows: calculating the dispersion of the settlement amounts of all the permanent scatterers in a preset period; and if the difference value of the settlement amount between any two permanent scatterers is smaller than or equal to the dispersion, assigning the settlement synchronization value to be 1, otherwise, assigning the settlement synchronization value to be 0.
3. The method for monitoring deformation risk of subway line based on InSAR technology as set forth in claim 1, wherein the process of obtaining the sedimentation coefficient is as follows: Calculating the average value of sedimentation synchronization values between each permanent scatterer and all the rest permanent scatterers; The sedimentation coefficient is the product of the average value and the sedimentation amount of each permanent scatterer at each time.
4. The method for monitoring the deformation risk of the subway line based on the InSAR technology as set forth in claim 1, wherein the ground settlement amount obtaining process is as follows: The product of the normalized value of the sedimentation deviation coefficient and the sedimentation quantity of each permanent scatterer is recorded as a deviation quantity; the ground settlement amount is the sum of the deviation amount and the settlement amount of each permanent scatterer.
5. The method for monitoring deformation risk of subway line based on InSAR technology according to claim 1, wherein predicting the ground settlement of each permanent scatterer at the next moment to monitor deformation risk of subway line comprises: According to the time interval between each moment and the next moment and the ground settlement of each permanent scatterer at the next moment, the settlement rate of each permanent scatterer is obtained, and the deformation risk state of the adjacent subway line of each permanent scatterer is estimated by judging whether the settlement rate exceeds the preset settlement rate.
6. The subway line deformation risk monitoring system based on the InSAR technology comprises a memory, a processor and a computer program stored in the memory and running on the processor, and is characterized in that the steps of the subway line deformation risk monitoring method based on the InSAR technology as set forth in any one of claims 1-5 are realized when the processor executes the computer program.

Description

Subway line deformation risk monitoring method and system based on InSAR technology Technical Field The application relates to the technical field of deformation monitoring, in particular to a subway line deformation risk monitoring method and system based on an InSAR technology. Background The subway line is one of core tools of urban public transportation, bears large traffic passenger flow and can effectively relieve ground traffic pressure. If the ground of the subway line is subsided, deformation of the subway rail is possibly caused, so that uneven rail and tunnel cracking are caused, and train jolting and even derailment are caused. With the development of synthetic aperture radar interference (Interferometric Synthetic Aperture Radar, inSAR) technology, the method is widely applied to the field of ground subsidence monitoring. Through carrying out deformation monitoring to the subway line, can discover the hidden danger in advance, reduce the fortune dimension cost, ensure the long-term safe operation of subway. The traditional subway line deformation monitoring method generally adopts a mode of combining real-time measurement and prediction, but the traditional method cannot fully distinguish the difference between ground subsidence caused by various subsidence factors, so that the subsidence factors affecting the subway line are wrongly identified, and further the calculation of the subsidence deformation state of the subway line is inaccurate, thereby affecting the accuracy of subway line deformation risk assessment. Disclosure of Invention In view of the above, it is necessary to provide a subway line deformation risk monitoring method and system based on the InSAR technology, which improves accuracy of subway line deformation risk assessment compared with the conventional subway line deformation risk monitoring method based on the InSAR technology: In a first aspect, an embodiment of the present application provides a subway line deformation risk monitoring method based on an InSAR technology, where the method includes the following steps: collecting the surface height data of each permanent scatterer on a subway line to be monitored in real time, thereby obtaining the settlement of each permanent scatterer at each moment; At each moment, obtaining a settlement synchronization value between any two permanent scatterers by comparing settlement amounts of the any two permanent scatterers, and fusing the settlement synchronization value with the settlement amounts of the permanent scatterers to obtain a settlement coefficient of each permanent scatterer; And obtaining the settlement coefficient of each settlement factor point by combining the settlement quantity of each permanent scatterer with the settlement quantity of the adjacent permanent scatterer, obtaining the settlement deviation weight of each permanent scatterer, combining the settlement coefficient of each permanent scatterer with the settlement quantity of each permanent scatterer, obtaining the settlement deviation coefficient of each permanent scatterer, combining the settlement coefficient of each permanent scatterer with the settlement quantity of each permanent scatterer, obtaining the ground settlement quantity of each permanent scatterer, and further predicting the ground settlement quantity of each permanent scatterer at the next moment so as to monitor the deformation risk of the subway line. In one embodiment, the process of obtaining the sedimentation synchronization value is: calculating the dispersion of the settlement amounts of all the permanent scatterers in a preset period; and if the difference value of the settlement amount between any two permanent scatterers is smaller than or equal to the dispersion, assigning the settlement synchronization value to be 1, otherwise, assigning the settlement synchronization value to be 0. In one embodiment, the sedimentation coefficient obtaining process is as follows: Calculating the average value of sedimentation synchronization values between each permanent scatterer and all the rest permanent scatterers; The sedimentation coefficient is the product of the average value and the sedimentation amount of each permanent scatterer at each time. In one embodiment, the process of obtaining the contrast factor is: the settlement factor points are permanent scatterers with a preset proportion when all the permanent scatterers are arranged according to the settlement amount in a descending order; Recording the ratio of the settlement amount of each permanent scatterer to the settlement amount of each settlement factor point as the settlement amount ratio; the permanent scatterer farthest from each sedimentation factor point is marked as the farthest permanent scatterer of each sedimentation factor point, and the distance between each permanent scatterer and the farthest permanent scatterer of each sedimentation factor point is marked as a distance ratio compared with the ratio of the dis