摘要
采用为研究软岩洞室中自由式预应力锚索加固效应而进行的物理模型试验中的相关参数,在假设注浆体与岩石孔壁之间的摩阻力与其之间的相对位移存在比例关系,以及该摩阻力最大值与岩体力学性质,运用岩体与锚索单元网格自由剖分的方法,通过数值计算,对全长黏结式锚索在软岩洞室中的加固效应进行了研究,得到了洞壁开挖位移曲线以及锚柱表面摩阻力、锚柱轴力的分布曲线。研究结果表明,锚固洞室开挖位移大大减少;位于岩体活动区及稳定区的锚柱体上的摩阻力变化幅度不同;锚柱最大轴力点的位置是变化的等结论。
Using the numerical calculation method, the relevant material parameters are stemming from the model test researching the anchored effect of partly cement-imbedded anchor cable on weak country rock cavern and supposing that the surface force of friction of cement body is in proportion to the relative displacement between the rock and the cable, this paper studies the anchored effect of the fully cement imbedded anchor cable on the same cavern with the model test; and gives the displacement curve of the cavern walls and the curve of the surface force of friction of cement body; and obtains such conclusions that the displacements of the anchored cavern are reduced etc.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2006年第2期294-298,共5页
Rock and Soil Mechanics
关键词
软岩
洞室
全长黏结式锚索
数值计算
weak country rock
cavern
fully cement-imbedded anchor cable
numerical calculation
