2024年 02期

摘要(Abstract)：

为了解决水库土石坝坝基地震液化导致严重坝体变形和边坡失稳等灾害，从而对水库土石坝长效安全运行造成严重威胁的问题，以某水库土石坝为例，利用有限差分软件FLAC3D 7.0及其内置P2PSand模型(practical two-surface plastic sand model),对存在地震液化地基的水库土石坝进行地震动力响应分析。结果表明：地震强度与相对密实度对水库土石坝坝基地震液化趋势影响较大，超孔压比随着地震过程的进行而逐渐增大，增大幅度约为10.46%;随着坝基地震液化程度的提高，坝体变形更明显，并且坝基边坡稳定性劣化。

关键词(KeyWords)：水库土石坝;地震液化;P2PSand模型;边坡稳定性

基金项目(Foundation): 国家自然科学基金项目(51708251,51979122);; 山东省自然科学基金项目(ZR2023ME070);; 中国博士后科学基金项目(2019M652304)

作者(Author): 牛金帝,张西文,吕颖慧,邱宇,扈萍

DOI: 10.13349/j.cnki.jdxbn.20231212.002

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