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| Research on the Numerical Smiulation of Subsidence of Existing Tunnel Caused by Adjacent Metro Tunnel Construction in Shenzhen |
| ZHANG Hui-gang1, JIANG Zhi-ling2, ZHANG Yu-wei1 |
| 1. China Railway Eryuan Engineering Group Co. Ltd, Chengdu, Sichuan 610031, China; 2. Southwest Petroleum University, Chengdu, Sichuan 610500, China |
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Abstract Research purposes: The process is simulated for construction of ametro tunnel adjacent to existing tunnel in Shenzhen with FLAC3D software and the discussions are made on the surrounding stratum displacement, the existing tunnel subsidence, ground subsidence, the safety of the new tunnel and the adjacent metro tunnel.
Research conclusions:Under this geological condition and specially pushing force of shield, the maximum of the ground subsidence is12. 9 mm, and the maximum rise value of ground is0. 7 mm.They satisfy the design requirements. After the completion of the existing tunnel and taking some measures, the corresponding consolidated subsidence value is 1. 8 mm. Thewidth of subsidence slotunder the tunnel floor is 60 m. The subsidence curve is relatively fla,t which satisfies the lateral differential subsidence demand of the existing tunnel.
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Received: 16 December 2008
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2009, Vol. 26 
