地震作用下含倾斜软弱夹层边坡内群桩的弯曲变形研究

doi:10.13722/j.cnki.jrme.2017.0182

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Abstract The centrifugal shaking table test with the centrifugal acceleration of 50 g was carried out to investigate the bending moments and deformation modes of the pile group installed slope with intercalated weak layer and to investigate the effect of the inner deformation of slope and the inertia force of superstructure on the pile group foundation. The results showed that the bending deformation of the pile group foundation was controlled by the inertia force of the superstructure under the seismic excitations，and the range is limited around the pile top and take up 26%–28% of overall length of the piles. The modes of bending deformation of the pile group foundation were classified as the uniform type and the non-uniform type，the types with and without the inflection point，the parallel and non-parallel types. The effect of intercalated weak layer on the amplification coefficients of acceleration within the slope is related to the peak values of input accelerations and the amplification coefficients of the weak intercalated layer increased nonlinearly with the increasing of the peak values of input acceleration. Besides，there are obvious differences in the dynamic responses of superstructure and ground surface of the slope，and the differences were increased nonlinearly with the increasing of the peak seismic acceleration and were multiple increased when the input acceleration peak is equal or greater than 0.25 g.

Key words： pile foundation weak intercalated layer slope site pile group foundation centrifugal shaking table experimental study

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	Articles by authors
	YAN Kongming1
	LIU Feicheng1
	ZHANG Jianjing1
	LIU Yang1
	WANG Zhijia2

Cite this article:

YAN Kongming1,LIU Feicheng1,ZHANG Jianjing1, et al. Bending deformation of pile group in the slope with intercalated weak layer under seismic excitations[J]. , 2017, 36(8): 1966-1976.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2017.0182 OR https://rockmech.whrsm.ac.cn/EN/Y2017/V36/I8/1966

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