交叉隧道施工对已有隧道稳定性影响研究

doi:10.13722/j.cnki.jrme.2013.1809

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摘要近接隧道施工过程中面临地质条件复杂、围岩扰动较大等诸多问题，合理施工方法的研究极其必要。以从莞高速新建走马岗公路隧道上方穿越东深供水隧洞工程为背景，首先，结合现场振动安全的施工要求，采用数值计算提出交叉段合理施工工法。同时，在交叉段施工过程中，对在建隧道的围岩压力、初期支护结构的受力情况以及既有供水隧洞的断面收敛等进行了实测，结果表明：在建隧道的围岩压力10 d内基本稳定，拱腰位置围岩压力较大，右侧拱腰最大为0.2 MPa，之后缓慢减小并趋于稳定。既有东深供水供水隧洞内安全监测数据表明：断面收敛及混凝土应变均相对较小，在安全范围之内。研究成果与方法可为类似工程提供参考。

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关键词 ：隧道工程, 交叉隧道, 施工方法, 围岩压力, 稳定性

Abstract：More and more cross tunnels are facing complicated geological conditions and significant disturbance of surrounding rock，and it is quite necessity to research reasonable construction methods for tunnels. Based on the project of Zoumagang highway tunnel passing through upon Guangdong Yuegang water supply tunnel. Firstly，the construction method was numerically simulated for safety and construction sequences have been suggested according to vibrate speed control criterion for DWSS tunnel. Meanwhile，the ground pressure of surrounding rockmass of primary tunnel support and section convergence of existing tunnel were monitored. The field measurements show that at the intersection of two tunnels，the surrounding rock pressures of excavating tunnel achieved stability in 10 days basically. And the maximum ground pressure was 0.2 MPa and appeared at the hance of the tunnel and then decreased to a stable value slowly. The convergence and concrete strain of the water supply tunnel were relatively little. The research results showed that this construction method was safe and reliable. The achievements from the research work will benefit work can provide reference for similar projects.

Key words： tunnelling engineering cross tunnel construction method surrounding rock pressure stability

引用本文:

陈卫忠1，2，郑东3，于建新4，李明1，袁敬强1，刘焕春4，田洪铭1. 交叉隧道施工对已有隧道稳定性影响研究[J]. 岩石力学与工程学报, 2015, 34(s1): 3097-3105.
CHEN Weizhong1，2，ZHENG Dong3，YU Jianxin4，LI Ming1，YUAN Jingqiang1，LIU Huanchun4，TIAN Hongming1. STUDY ON STABILITY OF CLOSE CROSS TUNNEL ON EXISTING TUNNEL. , 2015, 34(s1): 3097-3105.

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http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2013.1809 或 http://www.rockmech.org/CN/Y2015/V34/Is1/3097

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