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Investigation Of Parameters Affecting Creep Behavior Of Sandy Clay Soil In Laboratory Conditions

Submitted2016-12-13
Last Update2016-12-13
TitleInvestigation Of Parameters Affecting Creep Behavior Of Sandy Clay Soil In Laboratory Conditions
Author(s)Author #1
Author title:
Name: Alireza Negahdar
Org: Assistant Professor, University of Mohaghegh Ardebili, Ardebil, Iran.
Country:
Email: negahdar@uma.ac.ir

Author #2
Author title:
Name: Shima Yadegari
Org: MSc Student, University of Mohaghegh Ardebili, Ardebil, Iran
Country:
Email: yadegari.shima@gmail.com

Author #3
Author title:
Name: Siyab Houshmandi
Org: PhD Sudent, University of Mohaghegh Ardebili, Ardebil, Iran
Country:
Email: houshmandi_76@yahoo.com

Other Author(s)
Contact AuthorAuthor #1
Alt Email: negahdar@uma.ac.ir
Telephone:
KeywordsCreep, One-dimensional creep test, Single-stage test, Stepwise test, Overloadedunloaded test
AbstractInvestigation of mechanisms and factors influencing the creep behavior of soils is one of the main requirements in geotechnical engineering. In this paper, one-dimensional single-stage, stepwise and overloaded-unloaded creep tests are carried out using oedometer apparatus on dried in air and water-saturated sandy clay soils at different stress levels, in order to investigate parameters affecting the creep behavior, such as: stress level, stress history and pore water. The creep mechanisms are explained with respect to contacts and deformation of particles. Data analyses are explained based on relationships between the coefficient of secondary compression (Cα) and change in void ratio (Δe). Test results showed that in water saturated samples at low stress level, due to higher sliding ability and lower friction, a large amount of creep deformation occurs and with increased stress level, the creep rate decreases. But, in dry samples, stress increment increases creep rate. Further, the creep rate in overloaded-unloaded test is higher than that in single-stage test, and this in turn accelerates the creep.
Paperview paper 3786.pdf (1493KB)

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