交通荷载作用后粉质黏土不排水强度特性试验研究

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Abstract To investigate the effect of drainage condition，disturbance of construction and overconsolidation effects on the static undrained strength of the soil，a series of postcyclic undrained triaxial strength tests are carried out on samples of a silty clay(obtained along Beijing—Tianjin speed line). The results show that the generated excess pore pressure and residual shear strain of the specimens after long-term traffic load both can be regarded as the characterizations of damage degree of soil structure，and they all have their threshold values. If the pore pressure or shear strain after cyclic load exceeds its threshold value，the strength attenuation of the specimens will be caused. Apparent reductions in the threshold values are observed as the post cyclic strength by comparison of the reconstituted and intact specimens. Moreover，the soil strength of reconstituted one is lower than that of intact one at the same effective confining stress，which means that the construction disturbance should be paid more attention. Good drainage condition will enhance the bearing capacity of normally consolidated foundation. The traffic load and drainage conditions have little effects on the post cyclic shear strength of the foundation with the application of preload treatment.

Key words： soil mechanics undrained shear strength traffic load silty clay apparent overconslidation ratio(AOCR)

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	Articles by authors
	HUANG Bo1
	2
	DING Hao1
	2
	CHEN Yunmin1
	2
	BIAN Xuecheng1
	2

Cite this article:

HUANG Bo1,2,DING Hao1, et al. EXPERIMENTAL STUDY OF UNDRAINED STRENGTH PROPERTY OF SATURATED SILTY CLAY AFTER TRAFFIC LOAD[J]. , 2010, 29(S2): 3986-3993.

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https://rockmech.whrsm.ac.cn/EN/Y2010/V29/IS2/3986

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