ISSN 2096-4498
CN 44-1745/U
Tunnel Construction ›› 2015, Vol. 35 ›› Issue (6): 535-541.DOI: 10.3973/j.issn.1672-741X.2015.06.007
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CAO Zhihao, DAI Zhiping, GU Xueying
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Abstract:
As more and more construction activities take place adjacent to existing Metro lines, the study on the influence of the foundation pit construction on existing Metro tunnels becomes more and more important. In this paper, the influence of the groundwater seepage on the existing Metro tunnel under different waterinsulating curtain depths is studied by means of FLAC 3D software, with a foundation pit adjacent to No. 1 Line of Suzhou Metro as an example. In the simulation, the displacement field of the Metro tunnel and the stress of the tunnel segments are studied under 2 different depths of the waterinsulating curtains. The study results show that: 1) The increase of the depth of the waterinsulating curtain is helpful for the reduction of the pore water pressure around the tunnel, and in turn helpful for the control of the structural deformation of the tunnel; 2) As the depth of the waterinsulating curtain increases, the stress on the tunnel structure induced by the dewatering in the foundation pit reduces.
Key words: foundation pit, Metro, displacement field, segment stress, tunnel, waterinsulating curtain, pore water pressure, structural deformation
CLC Number:
U 45
CAO Zhihao, DAI Zhiping, GU Xueying. Analysis on Influence of Waterinsulating Curtain Depth on Existing Metro Tunnels: Case Study on a Foundation Pit in Suzhou[J]. Tunnel Construction, 2015, 35(6): 535-541.
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