库区堆积体边坡具有体积大、落差大和坡度陡的特点, 对枢纽工程具有潜在威胁。以西南某电站库区堆积体 为例, 基于GEO2SLOPE 分析软件对其稳定性进行计算与评价, 滑速计算采用能量法和潘家铮法, 涌浪高度计算采 用潘家铮法和水科院经验公式法。结果表明: 堆积体在蓄水工况下可能产生局部失稳, 在下游19 km 集镇处产生的 涌浪高度为0. 63 m, 但总体上形成的涌浪对下游沿岸集镇及大坝影响甚微。

Accumulatio n slope has the character istics of lar ge vo lume, big fall, and steep slope, w hich can induce potential thr eats to the key wat er projects. In this paper, the stability of an accumulation slo pe of a hy dr opow er statio n in southwest China w as calculated and evaluated using GEO2SLPOE softw are. The method of energ y and Pan Jiazheng metho d w ere adopted to calculat e sliding speed, and the surg e heig ht w as determined by empir ical formula method of IWH R and Pan Jiazheng met ho d. The r esults show ed that local instabilit y can o ccur in the accumulatio n under stor age condit ions and the sur ge height is 0. 63 m at a tow n of 19 km dow nstr eam. H ow ever, the sur ge has litt le impacts on the dow nst ream tow ns and the dam.

湖北省自然科学基金( 2012FFA040; 2012 FFB03804) ; 湖北省教育厅科学技术研究项目( D20121304) ; 地质灾害防治与地质环境 保护国家重点实验室开放基金( SKLGP2012K032)