【摘要】 凤凰至大兴公路K0+500-K5+000段穿越碳酸盐岩区,据地面调查及钻探揭露,查明公路沿线发育溶洞,对区内岩溶地质环境进行了调查。选取典型溶洞,采用有限元稳定性分析方法对岩溶体稳定性进行分析,路堑开挖后产生的位移为1.2mm,最大主应力为6.3MPa,运营状态下静力荷载20kPa,在此基础上分析拟建公路附近溶洞的稳定性。更多还原

【Abstract】 Fenghuang-Daxing highway k0+500-k5+000 passes through carbonate rock zone.Ground investigation and drilling exposition materials showed that limestone cave situation was verified.In order to evaluate the stability of typical karst cave,a series of finite-element analysis method was done.A conclusion was drawn that the maximum bias field should be 1.2mm,the maximum principal stress was 6.3MPa under the excavate condition and the maximum static load was 20KPa in cave periphery.更多还原