| 隧道掌子面与溶洞安全距离分析 |
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| 引用本文： | 刘超群,彭红君.隧道掌子面与溶洞安全距离分析[J].现代隧道技术,2012,49(3):109-113. |
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| 作者姓名： | 刘超群 彭红君 |
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| 作者单位： | 1. 陕西铁路工程职业技术学院,西安,714099
2. 中铁第四勘测设计院集团有限公司,武汉,430063 |
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| 摘 要： | 岩溶地区隧道开挖掌子面前方存在的大型溶洞对施工的威胁非常大,如何确定开挖掌子面前方合理的岩盘安全厚度,并及时进行超前支护或对溶洞进行处理,是岩溶隧道施工中必须解决的一个关键技术问题。文章通过数值模拟和理论计算,对隧道掌子面与溶洞安全距离的影响因素进行了分析研究,建立了预测隧道掌子面前方岩盘安全厚度的计算方法(经验类比法、理论计算法、数值分析法)及计算图式,给出了安全距离计算公式并进行了工程实例分析。
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| 关 键 词： | 隧道掌子面 岩溶 安全距离 |
Analysis of the Safe Distance Between a Tunnel Face and Karst Cave |
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| Liu Chaoqun
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Peng Hongjun.Analysis of the Safe Distance Between a Tunnel Face and Karst Cave[J].Modern Tunnelling Technology,2012,49(3):109-113. |
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| Authors: | Liu Chaoqun Peng Hongjun |
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| Institution: | 1 Shaanxi Railway Institute,Xian 714099;2 China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063) |
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| Abstract: | A large cave in front of the tunnel face in a karst area makes for a very large construction risk.It is very important to keep a reasonable laccolith thickness in front of the tunnel face and to use support in advance of the face during the construction of a karst tunnel.This study analyzes the factors affecting the safe distance between a tunnel face and karst cave by means of numerical simulation and theoretical calculation and establishes the calculation methods(empirical,analogue,theoretical calculation,and numerical analysis) plus computation schemes and formulas for predicting a safe thickness of laccolith in front of the tunnel face.Additionally,the analysis of a project case is carried out based on theoretical calculation and numerical simulation. |
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| Keywords: | Tunnel face Karst Safe distance |
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