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Construction Techniques by Shield Tunneling Method in Upper-Soft Lower-Hard Ground

FU Yan-bin(College of Civil Engineering,Shenzhen University,Shenzhen 518060,Guangdong,China)  
Taking a reconnaissance project in Shenzhen for example,the mechanism and physical and mechanical characteristics of Upper-soft Lower-hard ground in granite residual soils are analyzed in this paper.The key technique measure of construction parameters of shield method and muck conditioning technology are introduced in detailed and can provide some references for similar engineering.
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