本项目研究小湾左岸坝前堆积体在各种工况下的稳定性，并研究堆积体所在山梁下部岩质边坡的可能失稳范围。主要研究内容为：(1)堆积体抗剪强度参数三轴试验研究；(2)堆积体在天然无水、蓄水、无水开挖及地震等工况下的离心模型试验研究；(3)堆积体边坡在天然无水、滞水、蓄水、无水地震及蓄水地震等工况下的稳定性三维非线性有限元数值分析；(4)堆积体边坡在天然无水、滞水、无水地震及蓄水地震等工况下的二维、三维极限平衡分析。%This paper deals with the study of the stability of the deposit body located in front of the Xiaowan dam on the left bank under different operating conditions, and of the potential instability extent of the lower part rock slope of the 2? mountain ridge where the deposit body exists. The study covers the following main items: (1) the shear strength parameter triaxial test and study of the deposit body; (2) the centrifugal model test and study of the deposit body under different operating conditions of naturally no water, water impoundment, excavation without water, and earthquake, etc.; (3) the stability 3? D non? linear finite element numerical analysis of the deposit body under different operating conditions such as naturally no water, stagnant water, water impoundment, non? impoundment induced earthquake and impoundment induced earthquake, etc.; and (4) the 2? D and 3? D limit equilibrium analysis of the deposit body slope under the different operating conditions of naturally no water, stagnant water, water impoundment, non? impoundment induced earthquake and impoundment induced earthquake.
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