某水电站泄洪洞进口边坡拟采用预应力锚索进行加固。锚固参数的合理选取将直接影响到工程加固的可靠性以及经济性。因此，首先对该加锚边坡的预应力锚索的4个参数(锚固角度Φ、锚固力T、锚固间距H以及锚索长度L)进行敏感性分析，确定了这些参数的敏感性大小。然后再利用有限元法进行参数优化设计，得到了预应力锚索加固的最佳锚固参数。研究结果为提高开挖边坡的加固效果、降低工程的设计施工成本，起到了积极的作用。

The inlet slope of Spillway tunnel at a hydropower station is reinforced with the prestressed anchor cable. The reasonable selection of anchor parameters affects the reliability and economy of engineering reinforcement directly. In this paper, sensitivity analysis was performed on four anchor parameters (anchor angle Φ, anchoring force T, anchor spacing H, and anchor cable length L ) of the anchor slope, and the finite element method was used for parameter optimization design based on the results of sensitivity analysis to obtain the best anchor parameters for reinforcement of prestressed anchor cable. The results can offer valuable references to improve the reinforcement effects of excavation slope and reduce the cost of project design and construction.

国家自然科学基金(50909052；51109120)；三峡大学研究生科研创新基金（2012CX019）