现浇X形桩低应变动力检测足尺模型试验研究

doi:10.13722/j.cnki.jrme.2017.0203

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Abstract

Full-scale model tests are carried out to reveal the propagation mechanism of velocity waves of X- section pile in low strain dynamic testing. The velocity responses at various points are obtained by arranging measuring points at different locations at both pile top and pile bottom. The three-dimensional effect and high frequency interference of X-section pile in low strain testing are researched. The results show that the velocity responses in the direction of concave arc are similar with those in the direction of convex edge. The three- dimensional effects of incident waves on pile top are obvious；however，the reflection waves from pile bottom are almost the same. The arrival time of incident waves is increased with the increase of the distance from the pile center，while the time difference between incident and reflection waves is decreased. The high frequency interferences at the location of 0.4R to 0.5R from pile center are unobvious，while they are more significant at the edge of pile section. There are two kinds of high frequency interference waves in velocity waves of X-section pile in low strain testing.

Key words： pile foundation X-section cast-in-place pile integrity testing of pile shaft low strain dynamic testing three-dimensional effect high-frequency interference

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	Articles by authors
	DING Xuanming1
	FAN Yuming2
	LIU Hanlong1
	3
	HUANG Yuhang3

Cite this article:

DING Xuanming1,FAN Yuming2,LIU Hanlong1, et al. Full-scale model tests of low strain dynamic testing of X-section cast-in-place pile[J]. , 2017, 36(S2): 4290-4296.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2017.0203 OR https://rockmech.whrsm.ac.cn/EN/Y2017/V36/IS2/4290

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