西南山区岩质高边坡危岩体稳定性及运动特征研究  

Research on Stability and Movement Characteristics of Unstable Rock Masses of High Rock Slopes in Southwest Mountain Area

作　　者：文兴祥 Wen Xingxiang(Shaanxi Railway Survey Engineering Co.,Ltd.,Xi'an 710043,China)

机构地区：[1]陕西铁道工程勘察有限公司,西安710043

出　　处：《铁道勘察》2022年第3期45-51,共7页Railway Investigation and Surveying

摘　　要：为给西南山区公路岩质边坡危岩体治理工程提供依据,利用Rockfall软件模拟典型危岩体落石运动特征,采用静力平衡法对其形成机理、破坏模式、稳定性进行定性和定量分析,并提出合理的治理措施。研究表明:(1)危岩体形成过程是多种工程地质条件长期相互作用的结果;(2)稳定性计算显示,暴雨和地震会加速危岩体的形成过程并触发其失稳;(3)典型危岩体落石崩落轨迹的数值模拟结果表明,坠落式危岩落石崩落速度最快、运动距离最远、运动时间最长;倾倒式危岩落石次之,滑移式危岩落石整体相对最弱;(4)对重点治理区域内的8块危岩体,针对性提出“凹腔嵌补+锚固”“清除+拦截”和主动防护网3类治理措施。In order to provide references for treatment projects of unstable rock masses of rock slopes of the highway in the southwest mountainous area, Rockfall software was adopted to simulate the rockfall movement characteristics of typical unstable rock masses. The static balance method was used for qualitative and quantitative analysis of the formation mechanism, failure mode, and stability of the unstable rock mass in the dangerous rock areas. Reasonable prevention measures were suggested based on the results. Research indicates:(1) The formation process of unstable rock mass is the result of long-term interaction of various engineering geological conditions;(2) Based on the static balance method, it is revealed, from the perspective of stability calculation, that heavy rain and earthquakes will accelerate the formation process of potential unstable rock masses and trigger their instability;(3) Numerical simulation results of typical rockfall trajectories of different failure modes in unstable rock areas show that falling unstable rock masses have the fastest avalanche speed, the farthest movement distance, and the longest movement time;while dumping unstable rock masses is the second and sliding unstable rock mass rock is relatively weak overall;(4) Three types of prevention measures were proposed for the 8 unstable rock masses in key treatment areas: cavity embedding and anchoring, removal and interception and active protection nets.

关 键 词：岩质高边坡 危岩体 形成机理 静力平衡法 崩落轨迹 治理措施 

分 类 号：U416.14[交通运输工程—道路与铁道工程]