YANG Qi1，2，LENG Wuming1，NIE Rusong1，ZHOU Wenquan1，ZHU Wenbing1
(1. School of Civil Engineering，Central South University，Changsha，Hunan 410075，China；2. Mobile Post-doctoral Stations of Traffic and Transportation Engineering，Central South University，Changsha，Hunan 410075，China)
Abstract：The high speed railway has strict limitation for foundation settlement，The creep test was performed to investigate the creep deformation law of the compressible soil layers beneath pile toe of the high-speed railway bridge and to obtain the creep model and its parameters. The soil samples were explored from sandy soil layer beneath super-long pile toe and stressed by high-pressure. Its stress-strain-time curves under multilevel pressure were obtained from high-pressure confined compression test. It is found that the compression deformation experience the three stages of instantaneous deformation，consolidation deformation and damped creep deformation and that sandy soil behaved as non-linear creep characteristics for the negligible influence of pressure on creep modulus. A compute program of CPF was developed to determine the creep model and its parameters. The results indicate that the deformation characteristic of the sandy soil could preferably be simulated by the Schiffman viscoelastic model. The valuable reference are provided to calculate post-construction settlement of pile foundation with sandy soil layer beneath the pile toe.
杨 奇1，2，冷伍明1，聂如松1，周文权1，朱文兵1. 砂土蠕变特性试验研究[J]. 岩石力学与工程学报, 2014, 33(S2): 4282-4286.
YANG Qi1，2，LENG Wuming1，NIE Rusong1，ZHOU Wenquan1，ZHU Wenbing1. LABORATORY TEST STUDY OF CREEP BEHAVIOR OF SANDY. , 2014, 33(S2): 4282-4286.
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2014, Vol. 33 
