Consolidation Analysis of Partially Penetrated Sand-drained Foundation Based on Hansob’’ Flow

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Consolidation Analysis of Partially Penetrated Sand-drained Foundation Based on Hansob’’ Flow

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[1]Shi Gang,Koichi,Liu Zhongyu.Consolidation Analysis of Partially Penetrated Sand-drained Foundation Based on Hansob’’ Flow[J].Journal of Zhengzhou University (Engineering Science),2019,40(06):85-89.[doi:10.13705/j.issn.1671-6833.2019.03.003]

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Journal of Zhengzhou University (Engineering Science)[ISSN 1671-6833/CN 41-1339/T] Volume: 40卷 Number of periods: 2019 06 Page number: 85-89 Column: Public date: 2019-11-16

Title:: Consolidation Analysis of Partially Penetrated Sand-drained Foundation Based on Hansob’’ Flow

Author(s):: Shi Gang; Koichi; Liu Zhongyu; School of Civil Engineering, Zhengzhou University

Keywords:: ansbo seepage; The foundation of the sand well is not penetrated; smear area; Consolidation properties; FlexPDE

CLC:: TU433

DOI:: 10.13705/j.issn.1671-6833.2019.03.003

Abstract:: Drainage consolidation method is an effective method to improve the soft soil foundation such as muddy soil or fill soil foundation. However, when the soil layer is too thick, the sand drain may not penetrate the whole soft soil foundation due to the construction costs or construction difficulties. In the paper, the investigation is focused on the consolidation of partially penetrated sand-drained foundation, and the governing equations for the consolidation of soft ground with partially penetrated sand drains are put forward by introducing Hansob’s flow model. And the effect of the depth of sand drains, the parameters of Hansob’s flow model and the smear zone on consolidation behaviors is analyzed in detail. The results show that the depth of sand drains can affect the average consolidation degree of sand-drained foundation significantly, and the required consolidation time corresponding to Up=90% is about ten times more than that of ideal sand-drained foundation, when the depth of sand drains is 60% of the total depth of the foundation. The consolidation rate decreases with the increasing of the parametersandof Hansob’s flow, and it also decreases with the increasing of the scope of smear zone and the decreasing of the permeability coefficient of smear zone. Moreover, the scope and the permeability of smear zone have larger effects on the consolidation rate of the partially penetrated sand-drained foundation during the middle state of consolidation, while it has less effects on the consolidation rate during the last stage of consolidation.

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Last Update: 2019-11-25