上海市中心城区道路地下空洞预判研究初探

Preliminary Study on Predicting Underground Caves on Roads in the Central Urban Area of Shanghai

上海市中心城区道路由于封交原因,难以及时维护,一旦发生道路塌陷事故,易造成恶劣社会影响。为提升道路地下空洞探测精度,评估道路存在地下空洞的风险,总结研究了近年来上海市城市道路塌陷的典型案例,并汇总分析了国内现行城市道路塌陷的相关规范与标准,探索出了一整套可落地实施的地下空洞预判流程。结论如下:地下空洞的成因可主要归纳为地下管线渗漏、环境因素作用、地下施工干扰三类;预判指标可选取施工干扰、道路现状、地面荷载、岩土体条件、水环境条件、地下管线管龄、地下管线材料、地下管线类型、管线埋设方式、管线管径等;预判步骤可分为评估段划分、因素指标获取、线性加权、地下空洞等级划分四步。指导了道路地下空洞预判方法的进一步探索,最终实现地下空洞探测工作的高效化、精确化。

Roads in the central urban area of Shanghai are difficult to maintain in a timely manner due to traffic closures,and it is easy to cause adverse social impacts once a road collapse accident occurs.In order to improve the detection accuracy of underground cavities and evaluate the risk of underground cavities on roads,this study summarizes and studies typical cases of urban road collapse in Shanghai in recent years,summarizes and analyzes the current domestic norms and standards related to urban road collapse,and explores a complete set of feasible underground cavity prediction processes.The conclusion is as follows:The causes of underground cavities can be mainly summarized into three categories:leakage of underground pipelines,environmental factors,and interference from underground construction;The construction interference,road status,ground load,rock and soil conditions,water environment conditions,underground pipeline age,underground pipeline materials,underground pipeline type,pipeline burial method,pipeline diameter,etc;are chosen as predictive indicators.The pre judgment steps can be divided into four steps,such as:dividing the evaluation section,obtaining factor indicators,linear weighting,and dividing the level of underground cavities.This article can provide guidance for further exploration of prediction methods for underground cavities on roads,and ultimately achieve efficient and accurate detection of underground cavities.