ISSN 2096-4498 CN 44-1745/U
隧道建设(中英文) ›› 2015, Vol. 35 ›› Issue (1): 41-45.DOI: 10.3973/j.issn.1672-741X.2015.01.007
• 研究与探索 • 上一篇 下一篇
张昱辉1, 郭吉平2, 孔凡林3
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基金资助:
重庆市自然科学基金计划(CSTC,2009BB6245); 第54批博士后基金面上资助(2013M541542)
ZHANG Yuhui1, GUO Jiping2, KONG Fanlin3
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摘要:
为了解决隧道工程施工中围岩稳定性分析这一工程难题,依托某在建公路隧道,基于地质素描与数理统计分析工作,精细化描述节理产状、间距、填充物、黏聚力等特征,并利用三维重构技术建立基于节理特征的隧址区地层模型,最后利用块体理论检索了无支护、有支护工况下隧道临空面潜在的关键块体,分析了滑移形式和安全系数,并对支护参数进行了优化,得知原设计支护强度富余,适当优化后仍可确保结构安全。
关键词: 隧道工程, 块体理论, 围岩稳定性分析
Abstract:
The occurrence, spacing, filler, cohesive force and other characteristics of the joints of the surrounding rock of a highway tunnel under construction are described in detail on basis of geological sketches and mathematical statistics work, so as to solve the problems in the analysis on the stability of the surrounding rocks in tunnel construction. Then the model of the strata in the tunnel site, which is based on the joint properties, is established by means of threedimensional reconstruction technology. Finally, the potential critical blocks in the free face under nonsupport condition and under support condition are examined by means of block theory, the slip mode and the safety factor are analyzed, and the supporting parameters are optimized. It is concluded that the strength of the designed support is higher than needed and that the safety of the structure can also be guaranteed when the supporting parameters are appropriately optimized.
Key words: tunnel engineering, block theory, stability of surrounding rock
中图分类号:
U 451+.2
张昱辉, 郭吉平, 孔凡林. 基于块体理论的隧道围岩稳定性分析[J]. 隧道建设, 2015, 35(1): 41-45.
ZHANG Yuhui, GUO Jiping, KONG Fanlin. Analysis on Stability of Surrounding Rock of Tunnel Based on Block Theory[J]. Tunnel Construction, 2015, 35(1): 41-45.
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