岩土工程学报Issue(2)：363-368,6.DOI:10.11779/CJGE201502022
基于硬脆性岩体剥落性状的初始地应力场评估
Evaluation of in-situ stress based on spalling behavior of hard rock mass
摘要
Abstract
Due to change of stress in rock mass during excavation, brittle failure will happen in hard rock engineering with high in-situ stress, such as spalling, rock burst, etc., and the in-situ stress along tunnel axis with linear underground engineering is influenced by various factors. It is important to determine the distribution of in-situ stress for safe construction and lining support design. Based on the introduction of statistical distribution of in-situ stress, stress redistribution and deviatoric stress law of the surrounding rock are simulated under different combinations of tunnels and directions of the principal stress. Based on the failure criterion for brittle rock, a formula for solving the in-situ stress of plane perpendicular to tunnel axis is deduced considering the characteristics of failure of hard rock brittle. The formula is verified by practical engineering with high coherency. The results provide references for the determination of in-situ stress of underground engineering and the design of engineering support.关键词
隧道工程/硬岩/脆性破坏/地应力评估Key words
tunneling engineering/hard rock/brittle failure/evaluation of in-situ stress分类
建筑与水利引用本文复制引用
刘立鹏,汪小刚,李拙民,刘海舰,林兴超..基于硬脆性岩体剥落性状的初始地应力场评估[J].岩土工程学报,2015,(2):363-368,6.基金项目
国家重点基础研究发展计划（973计划）项目（2013CB035401）；国家自然科学基金项目（51179210）；中国水利水电科学研究院科研专项 （）
