摘要
通过FLAC3D程序,用实体单元模拟了岩体和砂浆体,用结构单元来模拟锚索,在砂浆体和岩体间设置接触面,对锚索施加预应力时采用新的建模方法,即通过结构单元来模拟压力分散型锚索的承压板,代替在承压板的位置施加均布力的方法,建立预应力锚固数值仿真模型。通过模拟试验,分析了接触面单元、岩体单元以及砂浆体单元的应力云图等,更加清晰地显示了压力分散型预应力锚索作用下岩体沿锚索轴向的应力、砂浆体与孔壁之间的粘结应力分布等情况。
In this paper ,the rock and mortar is simulated by solid mass element, the cable is simulated by structural element, the interface is setted between the rock and mortar, and the prestress is applied to the cable according to the new method in FLAC^3D program, that is to say, the board in pressure diffusion anchor cable is simulated by structural element rather than the distributed loads gained by the theoretical analysis are applied to the board. And then the numerical simulation model of prestress anchorage is established, After that, the stress nephogram of the interface, rock and mortar mass is analysed; and then the axial stress along cable in rock mass, bond stress distribution between mortar mass cell and membrane, which is affected by pressure diffusion anchor cable are displayed more clearly.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2008年第11期3144-3148,共5页
Rock and Soil Mechanics
基金
国家自然科学基金(No.50874085
No.50774058)
湖北省青年杰出人才基金(No.2005ABB022)
广东省科技计划项目(No.20064050002)资助
关键词
压力分散型锚索
数值模拟
锚固机理
pressure dispersion-type cable
numerical simulation
anchoring and reinforcing mechanism
作者简介
夏元友，男，1965年生，博士，研究员，主要从事岩石力学与工程方面的研究工作。E-mail：xiayy1965@126．com
