›› 2010, Vol. 31 ›› Issue (12): 3727-3732.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Experimental study of K0 of anisotropic sand

SONG Fei 1, 2, ZHANG Jian-min2, LIU Chao2   

  1. 1. Key Laboratory for Special Area Highway Engineering of Ministry of Education, Chang’an University, Xi’an 710064, China; 2. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
  • Received:2009-08-25 Online:2010-12-10 Published:2010-12-21

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Abstract:

The coefficient of earth pressure at rest, i.e. K0 is one of the important mechanical parameters for analysis and computation in geotechnical engineering. In engineering practice, the mechanical behavior of backfill is anisotropic due to compaction. Some sand samples with different sedimentation directions are made. Anisotropy of sand is revealed by triaxial drained tests where bedding planes of the samples are horizontal and vertical respectively. Measurement method of K0 is given on the basis of development of strain path test machine. The effect of different sedimentation directions on the K0 value is investigated. And comparison is made among test results, the results predicted by Jaky’s equation and those got by centrifuge model tests. The effectiveness and accuracy of the test method of K0 is confirmed by the centrifuge model tests of earth pressure. The results show that the neglect of the effect of anisotropy will underestimate K0 value and make the earth pressure underestimated.

Key words: earth pressure coefficient at rest, anisotropy, K0 consolidated test, centrifuge model test of earth pressure

CLC Number: 

  • TU 411
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