砂土蠕变特性试验研究

doi:10.13722/j.cnki.jrme.2014.s2.111

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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.

Key words： soil mechanics sandy creep test creep behavior rheological model parameters fitting

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	Articles by authors
	YANG Qi1
	2
	LENG Wuming1
	NIE Rusong1
	ZHOU Wenquan1
	ZHU Wenbing1

Cite this article:

YANG Qi1,2,LENG Wuming1, et al. LABORATORY TEST STUDY OF CREEP BEHAVIOR OF SANDY[J]. , 2014, 33(S2): 4282-4286.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2014.s2.111 OR https://rockmech.whrsm.ac.cn/EN/Y2014/V33/IS2/4282

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