| 浅埋大跨小净距隧道安全净距与中岩柱力学特性研究 |
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| 引用本文： | 王更峰,廖纪明,张永兴,王桂林. 浅埋大跨小净距隧道安全净距与中岩柱力学特性研究[J]. 工程勘察, 2011, 0(4): 18-23,27 |
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| 作者姓名： | 王更峰 廖纪明 张永兴 王桂林 |
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| 作者单位： | 重庆大学土木工程学院;中建五局土木工程有限公司; |
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| 摘 要： | 结合魁歧双洞八车道小净距隧道工程实践,采用三维弹塑性有限元,通过分析围岩位移、等效塑性应变以及隧道安全系数随净距的变化,综合确定魁歧隧道最小净距为0.55B是安全、合适的.在隧道开挖模拟过程中,采用三种不同中间岩柱加固措施,研究Ⅲ、Ⅳ、Ⅴ级围岩条件下中间岩柱受力、变形特性.研究结果表明,预应力锚杆对控制围岩水平变形最为...
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| 关 键 词： | 小净距隧道 安全净距 中间岩柱 力学特性 三维有限元 |
Study on safe clear distance and mechanical characteristics of middle rock pillar for shallow large-span tunnel with small clear distance |
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| Wang Gengfeng,Liao Jiming,Zhang Yongxing,Wang Guilin. Study on safe clear distance and mechanical characteristics of middle rock pillar for shallow large-span tunnel with small clear distance[J]. Geotechnical Investigation & Surveying, 2011, 0(4): 18-23,27 |
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| Authors: | Wang Gengfeng Liao Jiming Zhang Yongxing Wang Guilin |
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| Affiliation: | Wang Gengfeng1,Liao Jiming2,Zhang Yongxing1,Wang Guilin1(1.School of Civil Engineering,Chongqing University,Chongqing 400045,China,2.CCFEB Civil Engineering Corp.,Ltd,Changsha 410004,China) |
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| Abstract: | According to the construction of Kuiqi tunnel which is with two bores and eight lanes and with super-large section and span,the 3D elastoplastic FEM is used to analyze the variation of the surrounding rock displacement,the equivalent plastic strain and the safety factors with different clear distances.The safe clear distance of the large-span tunnels with small clear distance is determined as 0.55B,which is safe and appropriate.In the process of the tunnel excavation simulation,three kinds of middle rock pi... |
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| Keywords: | tunnel with small clear distance safe clear distance middle rock pillar mechanical characteristic 3D finite element method |
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