贵州万山区新屋场崩塌成因机制分析及风险评价

Genesis mechanism and risk assessment of the collapse in Xinwuchang,Wanshan County,Guizhou Province

新屋场崩塌是多种因素综合作用下逐步发展形成的,其形成机制为压致拉裂式倾倒。通过对成灾机理的分析、不同暴雨频率下稳定性及危险区范围预测、不同暴雨频率下的易损性计算得出新屋场崩塌在20年一遇暴雨工况下其风险性为“中风险”;在50年一遇暴雨工况下其风险性为“高风险”。

The collapse in Xinwuchang is gradually developed under the influence of various factors,and its formation mechanism is pressure-induced pull-crack dumping.Through the analysis of the disaster genesis mechanism,the stability and risk range prediction of the hazard area,and the risk calculation under different rainstorm frequency,it is concluded that the risk level of the collapse in Xinwuchang under once-in-twenty-year rainstorm is medium,and the risk level under once-in-fifty-year rainstorm is high.