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| Causal Analysis and Governance of the Water & Mud Bursting in Daliang Tunnel on Lanzhou-Xinjiang Second Railway
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| ZHANG Min-qing1，HE Zhi-jun1，HUANG Hong-jian2，REN Shao-qiang3，SHAN Hong-yu4
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| 1.Engineering Management Center, China Railway Corporation, Beijing 100844, China; 2.Chengdu-Guiyang Railway Co. Ltd, Chengdu, Sichuan 610031, China; 3.China Railway 20th Bureau Group Co. Ltd, Xi′an, Shanxi 710016, China; 4. Beijing Zhongtie Railway Soil Engineering Co. Ltd, Beijing 100055, China |
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Abstract Abstract：Research purposes： When Daliang tunnel of the Lanzhou-Xinjiang second railway constructs to the contact zone of the limestone and the slate in the syncline wing, sudden water & mud bursting disasters occurred many times, and the largest water inflow was 10 000 m3/h, the total of the mud-sand and stone was 20 000 m3,the deposition in the tunnel length was 236 m. Through the analysis of the reasons for water and mud bursting disasters, the effective management program was taken, the good processing effect was obtained.
Research conclusions：(1) In the contact zone of the soft and hard rock in deep railway tunnel syncline wings, because of good water conductivity, soft rock crushes, is prone to water and mud bursting.Therefore, should strengthen the advanced geological prediction during construction, to prevent disasters. (2)After the tunnel water and mud bursting occurred, it is necessary to evaluate the risk of dredging. Dredging the reasonable position should be promptly applied for the wall, to prevent the occurrence of secondary disasters. (3) For the tunnel water and mud bursting, take "positive closure, side circuitous, high interception" measures, can form processing working face, and open up new forms of working face, both ends flanking the processing situation, at the same time, high water interception can reduce the difficulty of the breach processing. The engineering practice has proved that, "both ends flanking, grouting, pipe shed support" measure is the effective method for treatment of water and mud bursting. (4)The research findings can be applied in the similar tunnel for treatment of water and mud bursting.
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Zhang Mei,Zhang Minqing,Sun Guoqing. Technology for Treating Burst Port of Filling Solution Cavity with High-pressure and Rich Water of Yesanguan Tunnel on Yichang-Wanzhou Railway［J］. Journal of Railway Engineering Society,2010(3):81-86.
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Zhang Minqing,Wang Gangling,Sun Guoqing. Treatment Technology for Mud Bursting of Baiyun Tunnel of Nanning-Guangzhou Railway in Fault［J］. Journal of Railway Engineering Society,2012(3):69-73.
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