Laboratory Test on Volumetric Characteristics of Saturated Sea Sand Under Cyclic Loading  

作　　者：刘汉龙 周云东 高玉峰 

机构地区：[1]Geotechnical Institute,Hohai University

出　　处：《海洋工程：英文版》2003年第1期93-100,共8页China Ocean Engineering

基　　金：ThispaperwasfinanciallysupportedbytheNationalNaturalScienceFoundationofChina (GrantNo .5 980 90 0 4 )

摘　　要：The deformation of sea coast or sandy deposits caused by earthquakes can lead to catastrophic damages to various port structures. The volumetric deformation is mainly induced by densification of sand during the dissipation of excess pore water pressure created by cyclic loading. Based on laboratory test, the reconsolidation volumetric characteristics of saturated sea sand are investigated. The experiments are conducted with a newly developed multi functional triaxial test equipment. Two types of dynamic loads are applied to the samples to clarify different kinds of affecting factors. It is found that the reconsolidation volumetric strain is correlated not only to the excess pore water pressure and the maximum shear strain during the dynamic loading, but also to the effective confining pressure. A new formula is put forward to calculate the volumetric strain during reconssolidation.The deformation of sea coast or sandy deposits caused by earthquakes can lead to catastrophic damages to various port structures. The volumetric deformation is mainly induced by densification of sand during the dissipation of excess pore water pressure created by cyclic loading. Based on laboratory test, the reconsolidation volumetric characteristics of saturated sea sand are investigated. The experiments are conducted with a newly developed multi functional triaxial test equipment. Two types of dynamic loads are applied to the samples to clarify different kinds of affecting factors. It is found that the reconsolidation volumetric strain is correlated not only to the excess pore water pressure and the maximum shear strain during the dynamic loading, but also to the effective confining pressure. A new formula is put forward to calculate the volumetric strain during reconssolidation.

关 键 词：SAND laboratory test RECONSOLIDATION volumetric strain confining pressure 

分 类 号：P737.14[天文地球—海洋地质]