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马家危岩体目前变形加剧,已严重威胁坡脚省道S210的畅通和居民安全,可能造成更严重的危害。根据危岩体结构特征和变形破坏迹象,分析了危岩体的2种破坏机制:拉裂—滑移式和拉裂—倾倒式。在此基础上,运用能量守恒定律和运动学规律研究危岩体失稳落石运动特征,落石运动到坡脚的最大弹跳高度为2.9 m,最大动能为1 289.54 kJ。结合施工条件,采用RXI-150型被动网来拦截落石,确保省道畅通和居民安全。
The current deformation of the Majianhe rock mass has aggravated the current situation and has seriously threatened the smooth flow of highway S210 and the safety of residents in Pojiao Provincial Highway, which may cause even more serious damage. According to the characteristics of the dangerous rock mass and the signs of deformation and failure, two kinds of failure mechanisms of the rock mass are analyzed: cracking - sliding and cracking - dumping. On the basis of this, the law of energy conservation and kinematics was used to study the characteristics of the loss of stable rock during the rockfall. The maximum bouncing height from the rockfall to the foot of the rock was 2.9 m and the maximum kinetic energy was 1 289.54 kJ. Combined with construction conditions, the use of RXI-150-type passive mesh to intercept rockfall to ensure the smooth flow of provincial highway and the safety of residents.