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锚杆单元及其在黄土隧道计算中的若干问题 被引量:21

SOME PROBLEMS ASSOCIATED WITH ANALYSIS OF TUNNELS IN LOESS USING BOLT ELEMENTS
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摘要 隧道设计施工中考虑围岩的自承作用是新奥法的核心思想之一,而采用锚喷支护是技术上的关键。如何考虑锚杆的作用至今仍存在值得探讨的问题。介绍了一种弹塑性锚杆单元,给出了黄土隧道考虑锚杆作用的数值分析结果,对锚杆的合理长度以及提高锚固区围岩力学参数模拟锚杆作用方面提出了合理的建议。 The basic idea of New Austrian Tunneling Method is to employ the self-sustaining ability of surrounding rock, and the bolt plus shotcrete system is one of the key technologies. Controversies still exist over the function of bolts and how to reasonably consider their effect. This paper presents an elastic-plastic bolt element and performs numerical simulation of tunnels in loess with bolt elements. The reasonable length of bolts and equivalent increase in values of parameters for surrounding soils are suggested for actual design of tunnel.
出处 《岩石力学与工程学报》 EI CAS CSCD 北大核心 2004年第24期4183-4189,共7页 Chinese Journal of Rock Mechanics and Engineering
基金 甘肃省中青年科技研究基金(YS021-A22--019) 甘肃省自然科学基金(ZS031-B25-008-G) 教育部留学回国人员科研启动基金 兰州交通大学青蓝人才工程基金资助课题。
关键词 隧道工程 黄土隧道 锚杆单元 数值分析 Bolts Deformation Elastoplasticity Finite element method Numerical analysis Testing Yield stress
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参考文献6

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