基于ABAQUS的降雨入渗条件下基坑边坡稳定性分析

发布时间：2018-10-26 19:38

【摘要】：降雨入渗条件下边坡的稳定性分析是评价边坡工程安全的主要依据,对工程施工具有重要的指导意义。以南水北调中线工程淇河倒虹吸基坑边坡为研究对象,基于ABAQUS有限元软件,考虑降雨入渗的边界条件,采用强度折减法求解了边坡的最大位移与安全系数,进行了边坡的稳定性分析。计算中,降雨入渗强度为15mm/h,持续时间为72h。计算结果表明:边坡一次开挖的水平方向最大位移、竖向方向最大位移、安全系数分别为0.26m、0.67m、1.650;边坡二次开挖后相应的计算结果分别为0.19m、0.62m、1.641;边坡三次开挖后相应的计算结果分别为0.20m、0.63m、1.639。定性分析与数值计算结果均表明,施工过程中,南水北调中线工程淇河倒虹吸基坑边坡是稳定的。本文的研究结果可以为该工程的施工提供理论依据,对降雨入渗时边坡的稳定性研究具有一定的借鉴意义。
[Abstract]:The stability analysis of slope under rainfall infiltration condition is the main basis for evaluating the safety of slope engineering and has important guiding significance for engineering construction. Taking the slope of the inverted siphon foundation pit of Qihe River Project of South-to-North Water transfer Project as the research object, the maximum displacement and safety factor of the slope are calculated by using the strength reduction method based on the ABAQUS finite element software and considering the boundary conditions of rainfall infiltration. The stability of the slope is analyzed. The rainfall infiltration intensity is 15 mm / h and the duration is 72 h. The calculation results show that the maximum displacement in horizontal direction and vertical direction in primary excavation of slope is 0.26 mm2 0.67 mm2 1.650 respectively. The corresponding calculation results of the slope after the second excavation are 0.19 mU 0.62mU 1.641and the corresponding calculation results after the third excavation of the slope are 0.20mU 0.63mU 1.639 respectively. The qualitative analysis and numerical results show that the slope of the inverted siphon foundation pit of Qi River in the Middle Route of South-to-North Water transfer Project is stable. The results of this paper can provide a theoretical basis for the construction of the project and can be used for reference in the study of slope stability during rainfall infiltration.
【作者单位】：西安理工大学水利水电学院;中国水电建设集团十五工程局有限公司;中国电建集团西北勘测设计研究院有限公司;
【基金】：国家自然科学基金(51309190;51579207) 陕西省科技统筹创新工程(2013KTZB03-01-01)
【分类号】：TV223

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