A quantitative analysis method and system for influence factors of land subsidence
A technology of land subsidence and influencing factors, applied in special data processing applications, instruments, electrical digital data processing, etc.
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Embodiment 1
[0073] In a specific embodiment, the technical solution proposed by the present invention is realized in the following manner:
[0074] On the basis of obtaining land subsidence monitoring information, combined with GIS spatial analysis, spatial data mining and machine learning methods, the contribution of various influencing factors of land subsidence (groundwater flow field, dynamic and static load stress field, and geological background) is ascertained. For the dynamic load stress field, the study selects the potential value in the data field model to describe it, extracts the distribution of the rail transit network in the study area, and identifies the spatial distribution of the rail transit load in the study area from the perspective of spatial big data mining. Load and land subsidence are used as data objects, combined with road and subway station nodes in the rail transit network and monitoring points for monitoring surface deformation, to establish a dynamic load data...
Embodiment 2
[0108] The main principle of SBAS-InSAR technology is to obtain N radar images in the same area, and generate several pairs of small baseline interference relatives by selecting the small baseline interference combination conditions. Assuming that there are M pairs, a differential interferogram is generated for the images, including M single-view and M multi-view differential interferograms, and then use the traditional SBAS-InSAR technology to extract the linear deformation rate and DEM topographic error of the obtained multi-view differential interferograms, and then extract the high-resolution single-view differential interferograms It is subtracted from the corresponding low-resolution single-view differential interferogram to obtain the residual phase, which mainly includes the deformation phase and the terrain phase. The formula can be expressed as:
[0109]
[0110] Among them, υ(x,r) and are the high-resolution mean velocity and nonlinear components in residual de...
Embodiment 3
[0181] In yet another specific embodiment, the technical solution of the present invention can also be realized by means of a system, and the system can execute the methods described in Embodiment 1 and Embodiment 2. Specifically, the present invention also provides a quantitative analysis system for factors affecting land subsidence, the system comprising:
[0182]The dynamic load stress field calculation module is used to select the corresponding dynamic load data object in the region, establish the dynamic load stress field, and quantify the distribution of the dynamic load stress field with the field potential value of the dynamic load stress field;
[0183] The static load stress field calculation module is used to perform radiation correction on the remote sensing image of the area, and construct an IBI index model based on the soil-adjusted vegetation index, the corrected normalized water index and the normalized building index;
[0184] The impact degree calculation mo...
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