超深岩石基坑破坏机理及预应力锚杆支护作用的数值模拟研究  

NUMERICAL STUDY ON FRACTURE MECHANISM OF EXTRA-DEEP EXCAVATION IN ROCKS AND SUPPORTING EFFECTS BY PRETENSIONED BOLTS

作　　者：冯锦艳[1] 王金安[1] 谢芳[1] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083

出　　处：《工业建筑》2006年第z1期676-679,657,共5页Industrial Construction

摘　　要：超深岩石基坑的破坏机理与土质基坑有本质的区别。通过对实例进行数值模拟分析,揭示了超深岩石基坑的破坏模式与破坏机理随基坑深度的变化规律,并且分析了预应力锚杆加固超深岩石基坑的作用机理和加固效果。There is an essential difference in failure mechanism between extra-deep excavation in rock and soil one.Based on the numerical simulation of the real extra-deep excavation,the relations of the fracture types and the fracture mechanism with depth of the excavation are studied.The working principles and the reinforcement effect by means of pre-tensioned bolts are analyzed.

关 键 词：超深岩石基坑 破坏模式 破坏机理 滑移场 预应力锚杆 

分 类 号：TU753[建筑科学—建筑技术科学]