利用物探遥感技术探查城市道路塌陷隐患

Using Geophysical Remote Sensing Technology to Detect Hidden Dangers of Urban Road Collapse

城市道路塌陷隐患排查对城市公共安全具有重要意义。本文利用物探和InSAR遥感技术,以南京市鼓楼区域为实验区,对道路塌陷隐患进行了探查和研究。利用InSAR技术获取2019年~2020年南京市鼓楼区主要道路的形变梯度信息;结合软土层厚度、管道渗漏点和轨道交通分布等信息,利用层次分析法建立道路塌陷评估模型,对实验区道路塌陷易发性进行评估和分析;利用地质雷达探测等手段进行验证和综合评价。结果表明,南京鼓楼区域道路塌陷易发性空间特征明显,呈现西南高东北低的趋势,高易发区主要分布在实验区龙园西路、湛江路、清凉门大街和凤凰西街等区域。

The investigation of hidden dangers of urban road collapse is of great significance to urban public safety.This paper uses geophysical prospecting and InSAR remote sensing technology to explore and study the hidden dangers of road subsidence with Gulou area in Nanjing as the experimental area.Firstly,the InSAR technology is used to obtain the deformation gradient information of the main roads in Gulou District,Nanjing from 2019 to 2020.Then,combined with the soft soil layer thickness,pipeline leakage points,and rail transit distribution information,the road collapse evaluation model is established using the analytic hierarchy process.This paper evaluate and analyze the susceptibility of road collapse in the study area.Finally,verification and comprehensive evaluation are carried out by means of ground penetrating radar detection.The results show that the susceptibility of road collapse in the Gulou area of Nanjing has obvious spatial characteristics,showing a trend of high in the southwest and low in the northeast.The high-prone areas are mainly distributed in the experimental area Longyuan west road,Zhanjiang road,Qingliangmen street and Fenghuang west street.