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以西部某水电岩石高边坡为背景,采用杆单元和杆单元节点集中力的方法模拟边坡自由式预应力锚索,通过有限元模拟和拟静力法分析相结合的分析方法,由有限元软件计算在地震作用下的锚索内力分布、边坡位移,并通过自编后处理程序计算出最不利结构面组合下的边坡整体稳定性安全系数。在此基础上,研究预应力锚索的锚固角度、预应力大小、锚固深度、锚索排间距与结构面之间的空间关系对地震作用下边坡变形和整体稳定性的影响规律,并以此为依据提出预应力锚索优化设计方法。
Based on the high rocky slope of a hydropower station in the west of China, the free-standing prestressed anchor cable is simulated by using the method of concentration of the pole elements of the bar element and the rod element. The finite element method and the quasi-static method are used to simulate the anchor cable. The element software calculates the internal force distribution of anchor cable and the displacement of slope under the action of earthquake, and calculates the safety coefficient of overall stability of slope under the combination of the most unfavorable plane by self-designed post-processing program. On this basis, the influence of prestressed anchor’s anchorage angle, prestressing force, anchorage depth, spacing between anchorage lines and structural plane on the deformation and overall stability of the slope under earthquake is studied. Based on this, Based on the proposed prestressed anchor cable optimization design method.