Analysis of deformation characteristics and driving factors along Kunming metro lines based on multi-source SAR data

doi:10.13474/j.cnki.11-2246.2026.0414

Abstract

Abstract: The rapid expansion of the urban underground transportation network and the frequent crossing of subway construction through complex geological areas can easily lead to potential safety hazards such as ground subsidence and structural damage to buildings.As a typical plateau fault basin city,Kunming faces unique geological challenges with its subway system.This study aims to analyze the spatio-temporal differentiation patterns and evolution trends of deformation along the subway line,quantitatively assess the driving mechanisms,and provide a basis for subway planning and disaster prevention.InSAR technology has become an important tool for monitoring deformation in urban infrastructure due to its large-scale and high-precision monitoring capabilities.This study selects the area along the Kunming metro as the subject,integrates multi-source SAR data,and proposes a cross-track multi-source InSAR point cloud fusion method.Using GIS spatial analysis techniques and incorporating a four-dimensional system of driving factors such as land cover,and is conducted.It reveals the spatio-temporal evolution patterns of deformation along the Kunming subway and identifies the main driving factors.This provides a scientific basis for subway planning and disaster prevention.

Key words: PS-InSAR, Kunming metro, multi-source SAR data, GIS analysis, driving factors

CLC Number:

P237

YANG Zhuo, CHEN Siran, YANG Mengshi, ZHAO Zhifang, HUANG Cheng, LIU Chaohai. Analysis of deformation characteristics and driving factors along Kunming metro lines based on multi-source SAR data[J]. Bulletin of Surveying and Mapping, 2026, 0(4): 97-103,126.

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