›› 2007, Vol. 28 ›› Issue (5): 1001-1004.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Study on degradation behavior of dynamic shear modulus for lightweight sand-EPS beads soil

WANG Shu-mao, GAO Yu-feng   

  1. Research Institute of Geotechnical Engineering, Hohai University, Nanjing 210098, China
  • Received:2005-09-16 Online:2007-05-10 Published:2013-09-10

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Abstract: The secant shear modulus of lightweight sand-EPS beads soil (LSES) under dynamic loads will degrade with increasing strain. Based on cyclic triaxial test data on LSES of different cement contents and EPS contents, a degradation model of Gsec is set up relating to factors such as confining pressure, shear strain and cement content. After comparison, the Gsec model of LSES is similar with those of sand and cemented sand, that is, Gsec-?d is hyperbolic and Gsec is linear to . Additionally, due to the bonding effect of cementation, the confining pressure dependency of Gsec decreases with increasing cement content, which is responded by the parameter n. While cement content reaches to 10 %, the variation of n is not clear. This is because cementing strength increases to the level which makes the relative location between particles of LSES uneasy to change.

Key words: lightweight sand-EPS beads soil (LSES), secant shear modulus, degradation behavior

CLC Number: 

  • TU 435
  • Please send e-mail to pingzhou3@126.com if you would like to read full paper in English for free. Parts of our published papers have English translations.
[1] WANG Shu-mao, GAO Yu-feng. Research on meso-structure of lightweight sand-EPS beads soil (LSES) using CT [J]. , 2006, 27(12): 2137-2142.
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