摘要
以三峡库区某典型堆积层滑坡为实例,采用Abaqus软件数值模拟的方法,对其在库水位波动下抗滑桩-土作用机理进行了研究。模拟结果显示:滑坡处于自然状态时,其坡体岩石的物理力学性质相对稳定,抗滑桩后缘会产生张力形成微小位移,坡脚处会产生最大值为-5.075 MPa的应力,桩土作用较小,整个滑坡比较稳定;库区水位下降,桩土之间位移最大处出现在桩顶,相较于自然状态变化较大,同时在渗透水压力作用下,桩土作用明显,桩的应力达到最大值56.38 MPa,该工况在抗滑桩作用下边坡稳定;水位上升,土体物理力学性能降低,滑体顶部位移变化大,为0.018 77 m,土体整体稳定性降低,桩土作用明显。
For a typical accumulation landslide in a reservoir area,the mechanism of anti slide pile soil interaction under the fluctuation of reservoir water level is studied by Abaqus numerical simulation method.The simulation results show that the landslide is in the natural state.The physical and mechanical properties of the rock slope are relatively stable.A micro displacement is formed by the tension of anti-slide pile.The maximum value of stress is -5.075 MPa.The effect of pile-soil is relatively small,and the landslide is relatively stable.When reservoir water level drops,the largest displacement between the pile and soil appears on the top of the body.Compared with the natural state,the change is greater.At the same time,under the action of seepage water pressure,the pile-soil interaction is obvious.The stress of the pile reaches the maximum value of 56.38 MPa.The slope stability is under the action of anti-slide piles.When the water level rises,the physical and mechanical properties of the soil decrease,and the displacement of the top sliding body varies greatly,which is 0.018 77 m.The overall stability of the soil decreases and the pile-soil interaction is obvious.
出处
《桂林理工大学学报》
CAS
北大核心
2017年第3期481-488,共8页
Journal of Guilin University of Technology
基金
郑州市科技计划项目(院士工作站建设计划)(131PYSGZ205)
关键词
滑坡
水位波动
抗滑桩
桩土相互作用
数值模拟
waterlevel fluctuation
anti-slide pile
pile-soil interaction
numerical simulation
作者简介
冯永（1984-）,男,博士,副教授,研究方向：工程地质及岩土工程.
