基于InSAR及综合物探方法的道路塌陷分析

Road collapse analysis based on InSAR and integrated physical survey methods

城市道路塌陷是近年来被关注的重点问题,涉及城市道路地下管线、水及土质等多种因素,具有隐蔽性、突发性和破坏性,因此及时探测排查隐患十分必要。目前已有多种物探手段可用于城市道路塌陷的探测。本文以西宁市部分街道为例,通过InSAR技术对其进行大范围普查,对出现沉降异常的重点区域采用地质雷达法、高密度电法、面波法等综合物探的方法进行探测,以弥补单一物探的不确定性和局限性,最后利用钻探的工程手段,针对不同物探方法的优缺点,建立了由面到线、由线到点、由浅至深、因地制宜的隐患排查系统,具有高效、低成本的优点。进一步探索适用于青海湿陷性黄土地区城镇道路的精细化探测手段,经验证可行性良好,可为预防道路塌陷提供更科学的依据。

Urban road subsidence is a key concern in recent years,involving urban road underground pipelines,water and soil quality and other factors,with hidden,sudden and destructive,so timely detection and investigation of hidden dangers is very necessary.There are a variety of physical detection means can be used for urban road subsidence detection.This paper takes some streets in Xining city as an example,conducts a large⁃scale survey of them through InSAR technology,and applies the integrated physical prospecting methods such as geo⁃radar method,high⁃density electrical method and surface wave method to the key areas where settlement anomalies appear,in order to compensate for the uncertainty and limitation of single physical prospecting,and finally implements the engineering means of drilling,it establishes a method from surface to line,from line to point,from shallow to deep,according to the advantages and disadvantages of different physical prospecting methods.The system has the advantages of high efficiency and low cost,and is suitable for the fine detection of urban roads in Qinghai􀆳s wet loess areas.The feasibility of the system has been confirmed,and it is recommended that a study of the development mechanism of the disease body should be carried out to provide a more scientific basis for the prevention of road subsidence.