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地震作用下软弱夹层对洞室围岩稳定的影响分析

发表时间:2010-01-31  浏览量:1904  下载量:809
全部作者: 袁达,李金波
作者单位: 河海大学土木工程学院;沈阳铁道勘察设计院有限公司
摘 要: 采用有限单元法研究分析软弱夹层的存在对地震作用下地下洞室围岩稳定的影响。选取一城门型隧洞为研究对象,通过软弱夹层与围岩的多种组合,重点研究分析了隧洞各关键点的位移影响系数和应力影响系数。结果显示:软弱夹层的存在对地下洞室在地震作用下既有减震作用也有放大效应,并总结得出了各种状况中软弱夹层对地震作用下地下洞室围岩稳定的影响程度及规律,为地下洞室的抗震设计提供参考意见。
关 键 词: 地下建筑;地下结构;软弱夹层;地震响应;影响因素
Title: Analysis on influence of weak interbed on stability of surrounding rocks of underground cavern in earthquake
Author: YUAN Da, LI Jinbo
Organization: College of Civil Engineering, Hohai University;Shenyang Railway Survey & Design Institute Co., Ltd.
Abstract: In this paper, finite element method is used to analyze the influence of weak interbed on stability of surrounding rocks underground cavern under the action of earthquake. This paper selects a gate-type tunnel as the research object, and focuses on research and analysis of displacement and stress influence coefficients of key points of the tunnel by use of a variety of combinations of the weak interbed and surrounding rocks. The results show that: in the earthquake, the presence of weak interlayer has both damping effect and amplification effect to the underground cavern. The paper also summarizes the degree and law of influence of the weak interbed on stability of surrounding rocks of underground cavern under various conditions in the earthquake, thereby providing advices for earthquake resistant design of the underground cavern.
Key words: substructure; underground structures; weak interbed; earthquake response; influencing factor
发表期数: 2010年1月第2期
引用格式: 袁达,李金波. 地震作用下软弱夹层对洞室围岩稳定的影响分析[J]. 中国科技论文在线精品论文,2010,3(2):156-160.
 
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