四川某崩塌区危岩稳定性评价

Stability Evaluation for a Collapse Region in Sichuan

汶川地震后,在地震灾区及影响区形成了大量的危岩崩塌地质灾害。通过对崩塌区地质灾害的调查,结合所收集的地质资料,分析了崩塌地质灾害的形成机制以及危害性,并选择区内典型危岩及断面,采用危岩体平面滑动法及岩有限元应力分析法,对崩塌区危岩体在各种工况条件下的稳定性进行评价。评价结果表明:有限元应力分析法与公式计算结果基本吻合,与实际情况基本一致。此结果可为崩塌灾害防治提供依据。

After the Wenchuan earthquake, large amount geological hazard of crag collapses were formed in earth quake disaster area and area of coverage. Through collapse region geological hazard investigation, combined with collected geological data, analyzed collapse geological hazard formation mechanism and harmfulness, selected typical crags and sections, using crag body plane sliding method and finite element stress analysis method, carried out collapse region crag body stability evaluation under various operating conditions. Results demonstrated that： the results from finite element stress analysis and from formula computed are basically coincided with practical situation. Thus, the results can be the basis in collapse hazard control.