摘要
斜坡对塔基的稳定性以及岩溶塌陷对塔基的影响研究不少,但针对处于斜坡之上的杆塔基础出现岩溶塌陷的研究较少,本文以某斜坡塔基础出现岩溶塌陷为例,通过建立不同治理方案的三维有限元模型来进行重力场作用和D腿桩基受抗压与水平荷载共同作用下的稳定性分析,研究桩基及周围岩土体的受力与变形。研究结果表明,在不同治理方案完成之后,在极限荷载作用下充填体阻碍了桩基发生水平位移,桩基及周围岩土体的受力、变形和塑性区分布两种工况基本相同,桩基的倾斜量小,可以保持稳定。本文运用FLAC3D有限元法分析斜坡塔基出现岩溶塌陷隐患,结果可为类似岩溶处理方案提供参考。
There is a lot of research on the stability of the slope on the tower foundation and the influence of karst collapse on the tower foundation,butthere are few studies on the karst collapse of the tower foundation on the slope.In this paper,based on karst collapse occurred in the foundation of a slope tower,Through the establishment of three-dimensional finite ele⁃ment models of different treatment schemes toanalyze the stability of the gravity field and the D-leg pile foundation under the combined action of compression and horizontal load to study the forces and deformations of the pile foundation and surrounding rock and soil.The research results show that after the completion of different treatment schemes,the filling body hinders the horizontal displacement of the pile foundation under the action of the ultimate load.The force and deformation of pile founda⁃tion and surrounding rock and soil and plastic zone distribution have basically the same.The tilt of the base is small and it can be kept stable.In this paper,the FLAC3D finite element method was used to analyze the hidden danger of karst collapse in slope foundation,the results can provide reference for similar karst treatment scheme.
作者
王绪民
雷志超
李剑
WANG Xu-min;LEI Zhi-chao;LI Jian(School of Civil Engineering&Environment,Hubei University of Technology,Wuhan 430068,China;State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sci-ences,Wuhan 430071,China)
出处
《地下水》
2021年第6期185-188,共4页
Ground water
关键词
岩溶塌陷
三维有限元模型
变形
数值模拟
Karst collapse
3D finite element model
deformation
numerical simulation
