预应力锚索在卸荷岩体中的作用机理

预应力锚索是岩土工程中常用的,也是效率比较高的一种支护形式。文中采用有限元分析方法和ADINA软件。岩体在加载和卸载条件下,其力学特性有本质的区别。文中重点分析了在卸荷条件下,预应力锚索同一数量不同倾角的变化对岩体变形参数如变形模量E和泊松比v的影响。不同倾角对岩体位移变形量的约束程度。文中提供了一种有效且比较符合工程实际的计算方法,等效变形参数法。这种方法可以算出含有节理的岩体的变形模量和泊松比,以及加有锚索后岩体的变形模量和泊松比。

The Action Mechanism of Prestress Anchor Rope in Loading Rock Mass

anchor rope which is common and great efficiency of the supports form is used in geotechnical engineering. Finite element method and ADINA software are applied . Under effected with loading and unloading, rock mass have different mechanical characters. It is analyzed that die rock's deformation parameters such as Young's modulus and Poisson's ratio are influenced by the change obliquity of anchor rope. And it is analyzed that rock mass displacement deformation is controlled by different obliquity of anchor rope. There is a numeration method which name is equivalent deformation parameter method. The method can calculate the Young's modulus and Poisson's ratio of rock mass which include rock , structure surface and anchor rope.