岩溶地区地下洞河诱发路基失稳处治分析

在我国的中西部地区,岩溶发育,分布着大量的岩溶洞穴;同时这些地区因地下矿产资源丰富,由于其地下开采历史悠久,以致于这些地区岩溶洞穴分布较广。本文依托昌金高速某段的岩溶塌陷进行了数值模拟,并结合塌陷段模拟分析所得的岩土体参数对邻近未塌陷段的二个处治方案进行了处治工程效果的数值模拟分析,为方案比选提供依据,对岩溶洞穴地区道路建设具有一定的指导与借鉴意义。

Processing Analysis on Roadbed and Subgrade Instability Caused by Underground Cavity and River in Karst Area

In the central and west regions of China,there is a large number of karst cavity distributed,at the same time,there are abundant mineral resources underground in these regions with its long history of mining.The goaf cavities are distributed widely.This thesis studies the subgrade stability of two projects in goaf-karst cavity areas.The analysis of subgrade stability caused by karst cavity was relied on a collapse accident happened at ChangJin expressway.The suitable parameter of rock and soil are obtained through the numerical simulation of collapsed subgrade.The treatment project for the subgrade near the collapse is evaluated by using the parameter gained in frontal calculation,and a better project is chosen based on the result of numerical simulation,which is important for construction of a highway in goaf-karst cavity area.