三维波动土中带承台单桩的纵向振动特性研究

doi:10.13722/j.cnki.jrme.2017.1046

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Abstract The longitudinal vibration of single pile with cushion cap in three-dimensional soil was derived according to three-dimension soil modeling around pile and fictitious soil pile. Firstly，the cap-pile-soil system was discretized into the finite segments considering the stratification of the surrounding soil and fictitious soil pile. Then the impedance function of displacement at the top of pile was obtained with the method of impedance function transfer. The analytical solutions of displacement of the system of cushion cap and pile in frequency domain were obtained. The semi-analytical solutions of displacement of the system of cushion cap and pile in time domain were obtained with Laplace transform. The parameters of the surrounding soil including the shear wave velocity，damping coefficient and Poisson′s ratio were analyzed. Meanwhile，the parameters including the shear wave velocity，depth and thickness of the hard interlayer in the multilayered soil were analyzed. Compared with the damping coefficient and Poisson′s ratio of surrounding soil，the shear wave velocity in surrounding soil has the greater effect on the longitudinal vibration of cap-pile system. The upper soil layer affects the longitudinal vibration of cap-pile system more than the lower soil layer. Finally，the theoretical calculated results were compared with the measured data from field monitoring, which confirmed the sensibleness of the three-dimension soil model of the pile with cushion cap.

Key words： pile foundation three-dimension soil cushion cap layered soil longitudinal vibration

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	Articles by authors
	WANG Kuihua1
	2
	GUO Haichao1
	2
	GAO Liu1
	2
	XIAO Si1
	2

Cite this article:

WANG Kuihua1,2,GUO Haichao1, et al. Longitudinal vibration of single pile with cushion cap in three-dimensional layered surrounding soil[J]. , 2018, 37(2): 497-505.

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http://www.rockmech.org/EN/10.13722/j.cnki.jrme.2017.1046 OR http://www.rockmech.org/EN/Y2018/V37/I2/497

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