摘要
以某潜在滑坡治理工程实例中的抗滑桩为研究对象,采用ANSYS有限元软件分别对普通抗滑桩及预应力锚索抗滑桩进行数值模拟。通过强度折减法及传统的极限平衡法对这2种支挡结构型式下滑坡的稳定性进行对比分析,研究在极限状态下的坡体变形与桩身塑性应变、内力分布变形规律。分析结果表明:潜在滑坡坡脚开挖卸荷极易引起滑坡失稳,预应力锚索抗滑桩和普通抗滑桩的合理应用均可以有效提高滑坡稳定性;在天然和饱水多种工况,预应力锚索抗滑桩下的滑坡整体变形、桩顶位移及桩身应变均小于普通抗滑桩的;预应力锚索抗滑桩对比普通抗滑桩在受力形式和内力分布方面也更为合理,可以更有效地控制滑坡体的变形与位移,对保证滑坡的稳定性更为有利。
Taking the anti-slide piles in one potential landslide treatment engineering as study ob- ject, this paper made a simulation and comparison of ordinary anti-slide piles and anti-slide piles with prestressed anchor cable by ANSYS. Through the strength reduction FEM and the tradi-tional limit equilibrium method, the stability of landslide treated with these two kinds of support-ing structure were analyzed, and the rules of the slope deformation and the plastic strain, internal force distribution of the pile body were studied. The results show that excavating the slope toe for unload can easily cause the landslide and the reasonable application of anti-slide piles with pre-stressed anchor cable and the ordinary piles can effectively improve the stability of landslide; un-der a variety of natural and saturated conditions, using anti-slide piles with prestressed anchor ca- ble, the landslide deformation, the pile top displacement and the whole strain of pile body will be smaller than that when using the ordinary anti-slide piles ; compared with the ordinary anti-slide piles, the stress and bending moment distribution of the anti-slide piles with prestressed anchor cable is more reasonable and the anti-slide pile with prestressed anchor cable can effectively con-trol the deformation and displacement of the landslide, which is more favorable to ensure the sta-bility of the landslide. 3 tabs, 7 figs, 14 refs.
出处
《长安大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第4期29-34,共6页
Journal of Chang’an University(Natural Science Edition)
基金
国家自然科学基金面上项目(41272285)
关键词
岩土工程
滑坡治理
抗滑桩
稳定性
ANSYS
强度折减法
geotechnical engineering
slide cure
anti-slide pile
stability
ANSYS
strength re-duction method FEM
