摘要
为实现土锚相互作用的数值模拟,研究全长粘结式锚杆拉拔工况下的受力变形特征,利用FLAC3D建立数值模型,分析锚杆受力特征、土体响应,以及拉拔性能的影响因素。结果表明:①接触面单元能较好地模拟土锚相互作用特征;②锚杆拉拔过程的峰值位移和极限拉拔力均与锚杆长度呈显著线性关系;③锚杆极限拉拔力与锚杆直径同样呈线性关系;④锚杆拉拔过程中,周围土体受到一定影响,其影响范围为:深度2L(L为锚杆长度),水平约1.5L。
A calculation model is built based on FLAG 3D for the numerical simulation of interaction between soil and cable. The mechanical deformation characteristics of soil mass and wholly grouted cable are studied under the pull-out condition, and the mechanical behaviors of cable, the response of soil mass, and the influence factors for pull-out performance are analyzed. It is shown that, （1） the interface element can do well in simulating the interaction between soil and cable; （2） the peak tensile force and the displacements under the peak tensile force are in a good linear relation with the cable length; （3） the peak tensile force increases with the increase of cable diameter linearly; （4） during the tension of cable, the surrounding soil is affected in a certain area, 2L（where L stands for cable length） in the depth direction, and 1.5L in the horizontal direction.
出处
《科技导报》
CAS
CSCD
北大核心
2009年第12期47-50,共4页
Science & Technology Review
基金
国家自然科学基金项目(50878212)
关键词
全长粘结式锚杆
拉拔性能
数值分析
变形特征
wholly grouted cable
pull-out characteristic
numerical analysis
deformation characteristic
