四川省汶川县城区某斜坡危岩体破坏模式及治理

危岩体是西南地区威胁交通和居民区安全的重要隐患。特别是“5．12”地震造成了原危岩体的崩塌，同时又形成了大量新的危岩体。汶川县城区某斜坡危岩体可归纳为三种破坏模式：拉裂-滑移式、整体剪切错落式和弯折-拉裂-倾倒式。危岩体失稳后，落石将会以弹跳、滚动和滑动方式沿坡体下落。运用能量守恒定律和运动学规律来确定落石的动能、落距和弹跳高度，采取GPS2型主动防护网、RX-075型被动防护网及落石槽相结合的措施，确保213国道和居民区的安全。

Failure Mode and Treatment of a Dangerous Rockmass in Wenchuan County, Sichuan Province

Dangerous rock masses pose a great threat to traffic and residential security in southwestern region of china, especially, the "5.12" earthquake in Sichuan province had caused the collapse of instable rock masses which was formed originally, at the same time, a large number of new dangerous rock masses had been appeared. A dangerous rockmass in Wenchuan County of the province could be devided for three failure modes: rip-slip failure mode, whole shear fall failure mode and bending-rip-dumping failure mode. When dangerous rockmass was instable, the falling rockmass would be bouncing, rolling and sliding along the slope. Through energy conservation law and the laws of kinematics, the paper ensured the kinetic energy of falling rockmass, distance of slope and the height of bouncing, then, combined with GPS2 type initiative protective net, RX-075 type passive protective net and stone falling channel to ensure the safety of 213 National Road and residential areas.