地下洞室开挖扰动区研究进展  

Advances in Research on Excavation Disturbed Zone of Underground Openings

作　　者：李扬帆[1] 盛谦[1] 张勇慧[1] 朱泽奇[1] 陆定杰[1] 

机构地区：[1]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,武汉430071

出　　处：《地下空间与工程学报》2013年第S2期2083-2092,共10页Chinese Journal of Underground Space and Engineering

基　　金：国家973计划项目课题(2010CB732001);国家自然科学基金(40972202);国家自然科学基金面上项目(51009130)

摘　　要：地下洞室开挖会形成新的临空面,这种卸荷作用使洞室周围一定范围内的岩体应力场发生改变,岩体力学性质及水力性质发生降低。发生这种改变的区域,一般称为开挖扰动区或开挖损伤区(EDZ)。研究开挖扰动区的特征及演化规律具有重要的理论价值及工程意义。本文从地下工程EDZ的概念分区、现场测试及实验研究、理论研究和数值模拟四个方面,对地下工程中现有的开挖扰动区的研究工作进行详细的总结和分析,认为如何根据测得的多个参数来综合评估开挖扰动区的范围和岩体力学性状是值得进一步研究的课题;深部的开挖扰动特征不同于浅部,需要进一步的深入研究;应该进一步加强数值模拟方法对开挖扰动区影响因素的研究。In underground excavation,both the stress field and the rock mechanical parameters around the openings will be changed by the unloading effect due to excavation. This affected area is generally called as excavation disturbed zone or excavation damaged zone(EDZ). It's of great theoretical significance and engineering significance to study the characteristics and evolution laws of EDZ. This paper provides an overview of the various experiments and studies on EDZ,including EDZ characterization,monitoring,theoretical research and numerical modeling. It is pointed out that the extent of EDZ should be determined by comprehensive consideration of various parameters; the excavation response of deep rock mass shows some new scientific phenomena,which needs further study; the key factors affecting excavation damage zone should be further studied with numerical simulation method.

关 键 词：地下洞室 开挖扰动区 测试与实验 理论研究 数值模拟 

分 类 号：TU452[建筑科学—岩土工程]