地下工程中支架和围岩相互作用的突变模型  

Catastrophe model of support and surrounding rock of underground engineering

作　　者：赵常洲[1] 李占强[1] 魏风华[1] 陈铁林[2] 

机构地区：[1]中国地质大学,北京100083 [2]南京水利科学研究院,南京210024

出　　处：《岩土力学》2005年第S1期17-20,共4页Rock and Soil Mechanics

摘　　要：建立了支架和围岩相互作用的突变模型,利用支架刚度和围岩的弱化刚度模量研究了围岩的突变失稳。研究结果从理论上解释了新奥法的支护原理。利用突变模型定量地给出了突变失稳的关键点。当围岩的变形量达到变形关键点以后,围岩就进入了散体区。变形关键点的大小是围岩-支架系统内部因素决定的,与外界条件无关。A catastrophe model of support and surrounding rock interaction is established. Catastrophe instability of surrounding rock is studied by using support stiffness and softening stiffness modulus of surrounding rock. The model gives rational theoretical basis of new Austrian tunnelling method. The key point of catastrophe instability is quantified. Support and surrounding rock become discrete material when its displacement get the key point. The key point is determined by internal cause rather than external c...

关 键 词：突变 围岩 支架 相互作用 

分 类 号：TU457[建筑科学—岩土工程]