| 锁脚锚杆在软弱围岩隧道中的应用 |
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| 引用本文： | 宋秉元. 锁脚锚杆在软弱围岩隧道中的应用[J]. 交通标准化, 2014, 0(15): 210-212 |
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| 作者姓名： | 宋秉元 |
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| 作者单位： | 张家口市城市快速路管理处,河北张家口075000 |
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| 摘 要： | 在研究锁脚锚杆作用机理的基础上,对软弱国岩隧道采用锁脚锚杆时的支护效果进行分析,应用有限元分析软件MIDAS/GTS进行数值模拟、计算和分析.分析结果表明,合理的锁脚锚杆长度和打入角度不仅能够有效地限制围岩的变形程度,而且有利于发挥支护结构承载能力.经过不断计算,一般土质隧道的锁脚锚杆的适宜长度大约为3～3.5m;锁脚锚杆打入角度为0°时,拱顶下沉量及净空收敛量最少.
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| 关 键 词： | 隧道 锁脚锚杆 下沉控制 围岩变形 |
Application of Foot Anchors in Soft Rock Tunnel |
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| SONG Bing-yuan. Application of Foot Anchors in Soft Rock Tunnel[J]. Communications Standardization, 2014, 0(15): 210-212 |
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| Authors: | SONG Bing-yuan |
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| Affiliation: | SONG Bing-yuan (Zhangjiakou City Expressway Management Office, Zhangjiakou 075000, China) |
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| Abstract: | Based on studying the mechanism of foot anchor, the paper analyzes the supporting effect of soft rock tunnel with foot anchor, applies finite element analysis software MIDAS/GTS to conduct numerical simulation, calculation and analysis. The analysis results show that, reasonable length of foot anchor and hitting angle not only can effectively limit the deformation of surrounding rock, but also be conducive to play the carrying capacity of supporting structure. Through the continuous calculation, it concludes that the suitable length of foot anchor with general soil tunnel is about 3 - 3.5m; the amount of subsidence and clearance convergence are the least when the hitting angle of foot anchor is 0 °. |
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| Keywords: | tunnel foot anchor sinking controlled deformation of surrounding rock |
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