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《Soil Engineering and Foundation》 2014-06
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Slurry-Shield Excavations in High Water Pressure in Silty Sand Soils at the Underwater Receiving End

HOU Jianjun;XIAO Minzhao;Sinohydropower Bureau 8 Co.,Ltd.;Wuhan Municipal Construction Engineering Group Co.,Ltd.;  
The construction techniques for the slurry-shielded excavation at the underwater receiving end of the tunnel are introduced in the paper with a case history of the Wuhan Metro Line No.2Project crossing the Yangtze River.The paper emphasizes the key techniques,such as,jet grouting reinforcement,ground freezing reinforcement at the receiving end,backfill of the vertical shaft and the shielded excavation.In Metro Line No.2Project,both the jet grout and the ground freeze are used for the ground improvement and the backfill operation is performed immediately after the excavation reached the end.These new techniques provide examples for resolving the high water pressure difficulties in the shielded excavations.
【CateGory Index】: U455.43
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