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目前已有的锚杆支护抗震设计主要采用拟静力方法,无法考虑锚杆与岩体的相互作用,也不能准确的评价锚杆支护后的边坡动力稳定性,为此,采用强度折减法动力分析法评价锚杆支护岩质边坡动力稳定性,该方法不仅考虑了锚杆与岩体的动力响应,还能得到边坡动力破裂面和锚杆轴力的变化情况,可以用于边坡锚杆抗震支护设计。然后以此为手段进行边坡锚杆支护设计,要求边坡达到容许安全系数即可,通过一个典型锚杆支护边坡实例分析,对锚杆支护参数进行了敏感性研究,研究结果为锚杆支护边坡的抗震设计及优化提供技术支持。
At present, the quakeproof design of the rock bolting support mainly adopts the quasi-static method, which can not consider the interaction between the rock bolt and the rock mass, and can not accurately evaluate the dynamic stability of the rock slope after rock bolting. Therefore, The dynamic analysis method of reduction method is used to evaluate the dynamic stability of rock slope supported by bolt. The method not only considers the dynamic response of rock bolt and rock mass, but also can obtain the change of dynamic fracture surface of rock slope and axial force of rock bolt. Used for seismic design of slope anchor. Then the design of slope bolt support is taken as the means to require the slope to reach the allowable safety factor. Through a typical case analysis of bolt supporting slope, the sensitivity of bolt support parameters is studied. The results It provides technical support for the seismic design and optimization of rock bolting slope.