小湾电站堆积体边坡锚固响应规律数值模拟实验

摘要

For the sake of probing into anchorage response law, this article researches on distributed law of compressive stress and tensile stress in deposit slope under group anchor cables by numerical simulation. The simulation result indicates that,under the action of group anchorage cables, compressive stress region overlaps one another around anchorage pier in rock mass, at the same time the compressive stress and tensile region superposes along free-sect's bottom and anchorage-sect's top too. However, the tensile stress region's superposition is disadvantage to anchorage. Moreover,the space between of anchor cables is fitting as 4.0 -5.0 m,and the strain of deposit slope is mainly concentrated about 2 m range around anchor cable.%为探讨堆积体边坡的锚固响应规律,运用数值模拟方法来分析群锚作用下堆积体边坡的压、拉应力分布规律.模拟结果显示,群锚作用下,在锚墩周边的岩体中形成的压应力集中区相互叠加,自由段末端、内锚段始端部位的压、拉应力区域也互相叠加,这种拉应力区的联合可能对锚固不利.此外,锚索间、排距以4～5m较为合适,堆积体边坡的岩体变形主要集中在锚索周边2m范围内.