渗透作用下滑坡-抗滑桩变形特征分析——以马家沟滑坡分析为例

发布时间：2018-02-03 15:28

本文关键词： Drucker-Prager模型渗透力抗滑桩时间效应　出处：《科学技术与工程》2017年25期 　论文类型：期刊论文

【摘要】：基于Drucker-Prager模型,以马家沟滑坡为分析对象,从水平抗力、位移的角度出发,利用有限元分析软件ABAQUS对库水位波动时渗透力作用下滑坡发育过程中滑坡-抗滑桩不同位置处的变形规律进行了研究。研究表明,库水位波动时,抗滑桩土体水平抗力及位移随渗透力的增大而增大;0~60 d,滑坡变形过程经历瞬间加卸荷变形、应力调整变形、应力稳步增长变形3个变形过程;0.5~40 d滑坡位移速率持续降低,滑坡处于减速蠕变阶段;40~100 d滑坡位移速率趋于稳定,滑坡处于等速蠕变阶段。滑坡位移速率趋于稳定时,土体的变形处于缓慢持续的状态,体现出马家沟滑坡的蠕滑特性;抗滑桩桩前、桩后水平抗力及位移呈现时间效应。
[Abstract]:Based on Drucker-Prager model, Majiagou landslide is taken as the analysis object, from the angle of horizontal resistance and displacement. The deformation law at different locations of landslide and anti-slide pile in the process of landslide development under the action of seepage force during reservoir water level fluctuation is studied by using finite element analysis software ABAQUS. The results show that when reservoir water level fluctuates, the deformation law at different locations of landslide and anti-slide pile is studied. The horizontal resistance and displacement of anti-slide pile soil increase with the increase of permeability. At 060 days, the deformation process of landslide experienced three deformation processes: instantaneous loading and unloading deformation, stress adjustment and deformation, steady increase of stress and deformation; The displacement rate of the landslide decreases continuously at 0. 5 and 40 days, and the landslide is at the stage of deceleration and creep. The displacement rate of the 40 ~ 100d landslide tends to be stable, and the landslide is in the stage of constant creep. When the displacement rate of the landslide tends to be stable, the deformation of the soil is in a slow and persistent state. It reflects the creep characteristics of Majiagou landslide. Before the anti-slide pile, the horizontal resistance and displacement behind the pile show time effect.
【作者单位】：华东交通大学江西省岩土工程基础设施安全与控制重点实验室;
【基金】：国家自然科学基金(51509092) 江西省自然科学基金(20161BAB216141) 江西省教育厅科研项目(150518) 岩土力学与工程国家重点实验室开放基金(Z015004)资助
【分类号】：TV223
【正文快照】： 江西省自然科学基金(20161BAB216141)、江西省教育厅科研项目(150518)和岩土力学与工程国家重点实验室开放基金(Z015004)资助引用格式:刁心宏,朱陈,于洋,等.渗透作用下滑坡-抗滑桩变形特征分析——以马家沟滑坡分析为例[J].科学技术与工程,2017,17(25):133—138Diao Xinhong,Z

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