›› 2011, Vol. 32 ›› Issue (4): 1029-1034.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Evaluation of earth pressure at active side for anisotropic sand

SONG Fei1, 2，ZHANG Jian-min2   

  1. 1. School of Highway, Chang’an University, Xi’an 710064, China; 2. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China
  • Received:2010-03-03 Online:2011-04-10 Published:2011-04-29

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Abstract:

Evaluation of earth pressure is one of the key research subjects in soil mechanics and geotechnical engineering. The backfill displays anisotropic mechanical characteristics because of compaction in engineering practice; it is always at the non-limit state between the active and passive states. Classic Rankine and Coulomb earth pressure theories do not consider the effect of anisotropy and backfill deformation on the earth pressure. Based on a series of constant strain increment ratio tests, the unique relation between the earth pressure coefficient and the lateral strain constraint is established for anisotropic sand. On this basis, a method is proposed for estimating the earth pressure at the active side for anisotropic backfill sand under translational wall movement mode; and corresponding formulas are derived. Besides, the effectiveness of the suggested method is confirmed experimentally.

Key words: earth pressure, anisotropy, constant strain increment ratio test, calculation method, active side

CLC Number: 

  • TU 443
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