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| STUDY ON STABILITY OF CLOSE CROSS TUNNEL
ON EXISTING TUNNEL |
| CHEN Weizhong1，2，ZHENG Dong3，YU Jianxin4，LI Ming1，YUAN Jingqiang1，LIU Huanchun4，TIAN Hongming1 |
| (1. State Key Laboratory of Geomechanics and Geotechnical Engineering，Institute of Rock and Soil Mechanics，Chinese Academy of Sciences，Wuhan，Hubei 430071，China；2. Research Center of Geotechnical and Structural Engineering，Shandong University，Jinan，Shandong 250061，China；3. Second Highway Consultants Co.，Ltd.，China Communications Construction Corporation，Wuhan，Hubei 430056，China；4. School of Civil Engineering，Henan Polytechnic University，Jiaozuo，Henan 454003，China) |
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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.
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MAO Yuting1, 2, HE Manchao1, 2, LIU Fangzhou3, BAI Xing4, YANG Xiaojie1, 2, TAO Zhigang1, 2*. Development and application of a large-scale physical model system for tunnel creep testing[J]. , 2026, 45(6): 1627-1638. |
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2015, Vol. 34 
