Unsaturated Creep Behaviors of Weak Intercalated Soils in Soft Rock of Badong Formation

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2015 > Vol12 No.6

	Unsaturated Creep Behaviors of Weak Intercalated Soils in Soft Rock of Badong Formation
	ZHU Yan-Bo; YUHong-Ming
刊名	Journal of Mountain Science
	2015-11
卷号	12 期号:6 页码:1460-1470
关键词	Badong formation Weak intercalated soils Unsaturated creep behaviors Soil triaxial apparatus Creep model
ISSN号	1672-6316
通讯作者	ZHU Yan-Bo
英文摘要	The cutting slopes in soft rock of redbed appeared in Yichang-Badong highway often suffer from the instability along weak intercalations, so the creep behaviors of weak intercalated soils are crucially important for the stability of cutting slopes. Because the deformation of weak intercalated soils is significantly affected by water content due to the strong water sensitivity, it is necessary to study the influence of matric suction on the creep behaviors of weak intercalated soils. In order to find out the unsaturated creep characters of weak intercalated soils, a GDS unsaturated triaxial apparatus was used. Then the triaxial creep experiments on weak intercalated soil samples under varying matric suction were conducted to obtain the unsaturated creep curves. The results show that the weak intercalated soils have obvious creep behaviors, and the creep strain is in nonlinear relationship with stress and time. When the matric suction is constant, a larger deviator stress will lead to a larger creep strain; When the deviator stress is constant, a smaller matric suction will lead to a larger creep strain. Based on the Mesri creep model, an improved creep model for weak intercalated soils under varying matric suction was established, in which the relationship of stress-strain was expressed with a hyperbolic function, and the relationship of strain-time was expressed with power functions in stages. Then an unsaturated creep model including stress-matric suction-strain-time for weak intercalated soils was established based on the power function relationship between matric suction and Ed (a parameter of the improved creep model). The comparison of the calculated values of creep model and the experimental values shows that the creep behaviors of weak intercalated soils can be predicted by the unsaturated creep model by and large.
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/11048]
专题	成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2015_Vol12 No.6
推荐引用方式 GB/T 7714	ZHU Yan-Bo,YUHong-Ming. Unsaturated Creep Behaviors of Weak Intercalated Soils in Soft Rock of Badong Formation[J]. Journal of Mountain Science,2015,12(6):1460-1470.
APA	ZHU Yan-Bo,&YUHong-Ming.(2015).Unsaturated Creep Behaviors of Weak Intercalated Soils in Soft Rock of Badong Formation.Journal of Mountain Science,12(6),1460-1470.
MLA	ZHU Yan-Bo,et al."Unsaturated Creep Behaviors of Weak Intercalated Soils in Soft Rock of Badong Formation".Journal of Mountain Science 12.6(2015):1460-1470.