基于ABAQUS对降雨条件下非饱和土坡稳定性的研究
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摘要
文章以非饱和土力学理论为基础,结合降雨入渗过程,采用ABAQUS软件中流固耦合模型对降雨条件下土坡稳定性进行了数值模拟。模拟结果表明:降雨前后边坡中孔隙水压力有较大变化,孔隙水压力的变化会直接影响土的基质吸力,基质吸力的下降致使边坡极易失稳;土坡的水平位移、竖直位移、总位移在降雨过程中也有较大变化;另外,在降雨过程中出现了逐渐扩大并趋于稳定的塑性应变区。
Based on the unsaturated soil mechanics theory,considering the rainfall infiltration process,using the ABAQUS software mid-stream solid coupling model,the soil slope stability under rainfall conditions is simulated.The simulation results show that the pore water pressure in the slope before and after rainfall has marked changes and directly affects the soil matric suction,resulting in the easy instability of the slope caused by the decline of the matric suction.The horizontal displacement,vertical displacement and total displacement of soil slope also have great changes during the rainfall.And the plastic strain zone appears in the slope during the rainfall and the zone expands gradually until it is stable.
Based on the unsaturated soil mechanics theory,considering the rainfall infiltration process,using the ABAQUS software mid-stream solid coupling model,the soil slope stability under rainfall conditions is simulated.The simulation results show that the pore water pressure in the slope before and after rainfall has marked changes and directly affects the soil matric suction,resulting in the easy instability of the slope caused by the decline of the matric suction.The horizontal displacement,vertical displacement and total displacement of soil slope also have great changes during the rainfall.And the plastic strain zone appears in the slope during the rainfall and the zone expands gradually until it is stable.
引文
[1]吴宏伟,陈守义,庞宇威.雨水入渗对非饱和土坡稳定性影响的参数研究[J].岩土力学,1999,20(1):1-14.
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[3]弗雷德隆德D G,拉哈尔佐H.非饱和土土力学[M].陈仲颐,张在明,陈愈炯,译.北京:中国建筑工业出版社,1997:392-447.
[4]张芳枝,梁志松.非饱和土性状及其边坡稳定性[M].北京:中国水利水电出版社,2011:61-84.
[5]费康,张建伟.ABAQUS在岩土工程中的应用[M].北京:中国水利水电出版社,2010:205-233.
[6]田仕明,董雨惠.边坡在降雨条件下的稳定性分析[J].科学技术与工程,2010,24(10):6079-6083.
[7]韩春秀,董羽蕙.岩质边坡稳定性分析的非线性有限元解法[J].水利与建筑工程学报,2006:4(4):65-67.
[8]Williams J R,Ouyang Ying,Chen Jinsong,et al.Estimationof infiltration rate in vadose zone:application of selectedmathematical models,EPA/600/R-97/128b[R].UnitedStates Environmental Protection Agency,1998.
[9]Gottardi G,Venutelli M.Richards:computer program forthe numerical simulation of one-dimensional infiltrationintounsaturated soil[J].Computers&Geosciences,1993,19(9):1239-1266.
[10]Neuman S P.Saturated-unsaturated seepage by finite ele-ments[J].Journal of the Hydraulics Division,ASCE,1973,99(12):2233-2250.
[11]《工程地质手册》编委会.工程地质手册[M].第4版.北京:中国建筑工业出版社,2007:842-843.
[12]王成华.土力学[M].武汉:华中科技大学出版社,2010:9-35.
[2]朱伟,山村和也.降雨时土堤内的饱和-非饱和渗流及其解析[C]//中国土木工程学会第八届土力学及岩土工程学术会议论文集.北京:万国学术出版社,1999:361-364.
[3]弗雷德隆德D G,拉哈尔佐H.非饱和土土力学[M].陈仲颐,张在明,陈愈炯,译.北京:中国建筑工业出版社,1997:392-447.
[4]张芳枝,梁志松.非饱和土性状及其边坡稳定性[M].北京:中国水利水电出版社,2011:61-84.
[5]费康,张建伟.ABAQUS在岩土工程中的应用[M].北京:中国水利水电出版社,2010:205-233.
[6]田仕明,董雨惠.边坡在降雨条件下的稳定性分析[J].科学技术与工程,2010,24(10):6079-6083.
[7]韩春秀,董羽蕙.岩质边坡稳定性分析的非线性有限元解法[J].水利与建筑工程学报,2006:4(4):65-67.
[8]Williams J R,Ouyang Ying,Chen Jinsong,et al.Estimationof infiltration rate in vadose zone:application of selectedmathematical models,EPA/600/R-97/128b[R].UnitedStates Environmental Protection Agency,1998.
[9]Gottardi G,Venutelli M.Richards:computer program forthe numerical simulation of one-dimensional infiltrationintounsaturated soil[J].Computers&Geosciences,1993,19(9):1239-1266.
[10]Neuman S P.Saturated-unsaturated seepage by finite ele-ments[J].Journal of the Hydraulics Division,ASCE,1973,99(12):2233-2250.
[11]《工程地质手册》编委会.工程地质手册[M].第4版.北京:中国建筑工业出版社,2007:842-843.
[12]王成华.土力学[M].武汉:华中科技大学出版社,2010:9-35.