城市坑洞覆土厚度探测及快速安全评估探讨

Discussion About Detection and Rapid Safety Assessment of the Pot Hole Covering Thickness in City

目前,城市地下坑洞尤其是早期的土质坑洞已成为引起道路大坑的重要隐患源,由于其具有分布广泛性和隐蔽性,对其安全性评价往往比较困难。通过探测坑洞覆土厚度,对坑洞土体土质物理力学性能进行试验分析等手段,借助有限元分析软件对不同断面形式的坑洞建模分析,可建立覆土厚度与坑洞安全承载的关系,得到覆土厚度安全临界值,对快速评估坑洞的安全问题具有很好的实践意义。

At present,urban underground pit,especially early soil hole has become the most important hazard source of road pit. It is difficult to evaluate the safety due to its extensive distribution and concealment. By detecting pit covering thickness,the experimental analysis was carried out on the physical and mechanical properties of pit soil,different cross sections in the form of a hole were analyzed by finite element software modeling analysis,covering thickness and hole safety load were set up,the relationship of safety threshold for covering thickness,rapid assessment of pit safety could be served as great significance in practice.