SIMULATION TEST OF STRESS AND PORE WATER PRESSURE INDUCED BY PILE PENETRATION
The changes of strain,stress and pore water pressure in soil caused by pile penetration is rarely investigated by stress-path controlled triaxial tests.The changes during pile penetration can be simulated through stress-path controlled triaxial test.The stress-path controlled triaxial tests were carried out on five samples of normal consolidated mucky clay or silt clay at different depths.It is found that the heights of the samples prepared horizontally increased during K0 consolidation.The increase in sample height was larger for samples with smaller Possion s ratio.In loading process,the total stress and the effective stress increased continuously with the increasing in strain without softening.The pore water pressure increased quickly initially and tended to a stable value when the strain is large.The pore water pressure coefficient increased first and then decreased with the increase in stress.A peak value of the pore water pressure appeared.With the dissipation of the pore water pressure,the consolidation coefficients were smaller for samples with higher initial strain and vice versa.The lateral effective stress and the average value of the lateral stress coefficient increased.
pile penetration stress-path controlled triaxial test coefficient of pore water pressure lateral stress
JIANYONG SHI SHENG CHEN
Key laboratory of MOE of geomechanics and dike engineering,Hohai University,Nanjing,China
国际会议
5th China-Japan Geotechnical Symposium(第五届中日岩土工程学术会议)
成都
英文
314-320
2013-05-18（万方平台首次上网日期，不代表论文的发表时间）