群锚加固机理与效果数值仿真试验研究

The Numerical Model Test for Pre-Stress Bolt Strengthening Machanism and Effect

在“单锚的力学模型与数值试验分析”的基础上，应用引进的大型岩土工程数值仿真分析软件，对群锚的机理与加固效果以及影响因素进行了系统的数值仿真试验研究；并应用多种岩体力学理论对数值试验验证的群锚加固机理进行了解释与分析；对岩体变形模量、砂浆强度、岩体C、φ值、预应力吨位、群锚间距等重要参数对锚固效果的影响作了有意义的分析与探讨。

Based on 'the mechanical model and numerical tests of single bolt', the introduced numerical model analysis software for large-sized geoengineering is used to carry out the systematical and numerical model tests for the mechanism, strengthening effects and other influencing factors of multi-bolts. The rock mechanics theories of many kinds are used to explain and analyses the strengthening machanism of multi-bolts identified by numerical tests. Also, this paper analyses and discusses the effects of such important parameters as the deformation modules of rock mass,sand grout strength, c, value of rock mass, pre-stressing tonages and span of bolts upon strengthening bolts.