›› 2012, Vol. 33 ›› Issue (1): 129-136.

• Geotechnical Engineering • Previous Articles     Next Articles

On failure mode and shear behavior of rock mass with interlayer staggered zone

XU Ding-ping1，FENG Xia-ting1，CUI Yu-jun1, 2，JIANG Quan1，ZHOU Hui1   

  1. 1. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China; 2. Ecole des Ponts Paris Tech., Paris France
  • Received:2010-05-27 Online:2012-01-10 Published:2012-01-17

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Abstract: Because of existence worldwide of interlayer staggered zone, there have been many engineering rock mass stability problems and geological disasters occurred over the world. In this paper, some cases of distortion failure or destruction of engineering rock mass structure induced by interlayer staggered zone are summarized. Rock mass structure controlling theory is adopted to categorize the failure modes of rock mass with staggered zone into tension crack failure, block-fall and interfacial shear slip failure. After that, it is shown that shear strength model is the main point when modeling for the mechanical behavior of interlayer staggered zone. A deep review of the existing test methods and the modeling theory for its shear behavior shows that the elasto-viscoplastic model is the fundamental constitutive model for describing the mechanical behavior of interlayer staggered zone.

Key words: interlayer staggered zone, failure mode, shear behavior, elasto-viscoplastic model

CLC Number: 

  • TU 443
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