基于Rockfall的沟谷区高位危岩体危险性评估

Rockfall-based risk assessment of high-level dangerous rock mass in valley area

为了降低高位危岩体对沟谷区建设用地威胁,以沟谷区内某商住小区为例,探讨高位危岩体危险性评估结果。通过资料收集和现场调查,采用Rockfall模型软件计算沟谷区高位危岩体对小区现状地质灾害危险性,评估了防治措施情景下的地质灾害危险性。用Rockfall模拟软件计算出沟谷区内危岩体现状和设计情景条件下的运动路径和最远威胁距离,确定建设用地红线范围内的地质灾害危险性结果。结果表明,现状条件下沟谷区建设用地红线范围内危险性中等区域面积112.15 m2,设计情景下建设用地红线范围均为危险性小的区域。

In order to reduce the threat of high-level dangerous rock mass to the construction land in the valley area,this paper takes a commercial and residential community in the valley area as an example to discuss the risk assessment results of high-level dangerous rock mass.Through data collection and on-site investigation,the Rockfall model software was used to calculate the risk of high-level dangerous rock mass in the valley area upon the current geological safety of the community,and evaluate the risk of geological hazards so as to facilitate preventive measure application.Rockfall simulation software calculates the current situation of the dangerous rock in the valley area,the movement path and the farthest threat distance under the design scenario conditions,and determines the geological hazard risk level within the red line set for the construction land.The results show that under the current conditions,the medium-risk area within the construction red line in the valley area is about 112.15 m2.Under the design scenario,all areas within the construction red line are low-risk areas.