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Study of mechanism of dynamic compaction replacement for reinforcing highway soft roadbed

WANG Hong-xiang1,2,YAN Shu-wang1,FENG Shou-zhong3(1.School of Civil Engineering,Tianjin University,Tianjin 300072,China;2.Anhui Provincial Communications Investment Group Co.,Ltd.,Hefei 230011,China;3.Shanghai Luckly Civil Engineering Co.,Ltd.,Shanghai 200092,China)  
In recent years,the dynamic compaction replacement(DCR) is widely used to consolidate soft soil foundation for its short period and simple construction and so on.But the reinforcement mechanism of DCR hasn't been well researched;theoretical study is far behind engineering practice;so it is hard to build up the design theory and method.Based on the Haiman expressway project in wetland and by using the finite element method,the mechanism of DCR reinforcing expressway soft roadbed in wetland is studied so as to give some reference to designers.
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