摘要
为了预测隧道建设中不稳定块体的位置,分析了隧道中几种主要形式的节理面,建立4种常见节理面计算模型,按照不利节理组合,预测出不稳定块体的出露位置,提出准危险块体的概念,并运用块体极限平衡理论对准危险块体进行受力分析,总结出在洞顶和侧壁容易形成的潜在掉块节理和节理组合,从工程的角度建立了一套确定不稳定块体的方法。
To predict the location of unstable blocks,the trajectory extending of the joint surface must be obtained first.Several major types of joint surface in the tunnel were analyzed,and four kinds of common joint surface equation in the spatial coordinate system were obtained by theoretical analyses.According to unfavorable joints combinations,the instability of the block exposed position can be predicted.The quasi-dangerous blocks are identified by using the block limit equilibrium theory.Finally,from the perspective of engineering practice,a systematic procedure is proposed to determine the unstable blocks,and can be potentially applied to tunnel constructions.
出处
《中国科技论文》
CAS
北大核心
2015年第1期21-25,共5页
China Sciencepaper
基金
高等学校博士学科点专项科研基金资助项目(20130095120016)
中国矿业大学实验室开放基金资助项目(2014201)
江苏省自然科学基金资助项目(BK20130193)
国家自然科学基金资助项目(51309222)
中央高校基本科研业务费专项资金资助项目(2014QNB37)
关键词
隧道工程
节理
不利节理组合
不稳定块体
节理面方程
tunnel engineering
joints
adverse joint combination
unstable block
joint surface equation
