小湾水电站坝前堆积体预应力锚索加固方案的三维有限元分析

小湾电站坝前堆积体规模较大县坝肩开挖时下侧局部被挖除，水库蓄水后堆积体下部净８浸于水中，水库水位的变化也将影响其稳定性，故需对其进行稳定性分析和加固方案的分析，作者在先前使用平面离散元法（ＵＤＥＣ）及有限元法对该堆积体在自然状态下的稳定性初步进行二维数值计算与分析的基础上，对堆积体又进行了预应力锚索加固的三维有限元分析，取得了相应的研究成果。

3-D Finite Element Analysis of Prestressed Cable Reinforcement Scheme of Deposit Body in Front of Xiaowan Dam

The deposit body in front of the Xiaowan dam is large in size and its lower side would be partially removed in excavation of the dam abutment. Its lower part will be immersed into water upon impounding of the Xiaowan reservoir and its stability will be subject to fluctuation of the reservoir level. It is therefore necessary to analyze its stability and reinforcement scheme. The authors carried out the 3 - D finite element analysis of the prestressed tendon reinforcement scheme of the deposit body on the basis of the preliminary 2 - D numerical calculation and analysis of the stability of the deposit body under its natural state made by them using UDEC and FEM previously, and achieved corresponding study results.