A Study of Consolidation Behavior of Clay Ground with Partially Penetrated PVD under Artesian Pressure

연직배수재가 부분 관입된 점토지반의 피압에 따른 압밀 거동에 관한 연구

Yun, Daeho;Nguyen, Ba Phu;Kim, Jaehong;Kim, Yuntae

  • Received : 2016.01.19
  • Accepted : 2016.03.23
  • Published : 2016.03.30


Many researchers reported that artesian pressure exists in thick soft ground of Busan Nakdong river estuary. Artesian pressure in soft ground could affect rate of consolidation, settlement and drainage capasity of prefabricated vertical drain(PVD). This paper investigated consolidation behaviors of soft ground with partially penetrated PVD subjected to artesian pressure. Laboratory tests with 1-dimensional large column equipment and their numerical analyses were carried out. Test results showed that the consolidation settlement of clay ground with artesian pressure was higher than that without artesian pressure. Due to artesian pressure, the dissipation rate of excess pore water pressure was reduced in soft ground with artesian pressure, especially at bottom part of clay ground. Numerical results were in good agreement with experimental test results.


Consolidation;Artesian pressure;Vertical drain;Clay ground


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