INSTABILITY MODEL OF VERTICAL LAYER ROCK SLOPE BASED ON THE STATISTICAL CONSTITUTIVE DAMAGE MODEL

LIU Hong-yan; DAN Zengzuoma; LIU Ye; XING Chuang-feng; ZHANG Ji-hong

2013 Vol. 19, No. 2

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Article navigation > Journal of Geomechanics > 2013 > 19(2): 198-205

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LIU Hong-yan, DAN Zengzuoma, LIU Ye, XING Chuang-feng, ZHANG Ji-hong. INSTABILITY MODEL OF VERTICAL LAYER ROCK SLOPE BASED ON THE STATISTICAL CONSTITUTIVE DAMAGE MODEL[J]. Journal of Geomechanics, 2013, 19(2): 198-205.

Citation:

LIU Hong-yan, DAN Zengzuoma, LIU Ye, XING Chuang-feng, ZHANG Ji-hong. INSTABILITY MODEL OF VERTICAL LAYER ROCK SLOPE BASED ON THE STATISTICAL CONSTITUTIVE DAMAGE MODEL[J]. Journal of Geomechanics, 2013, 19(2): 198-205.

INSTABILITY MODEL OF VERTICAL LAYER ROCK SLOPE BASED ON THE STATISTICAL CONSTITUTIVE DAMAGE MODEL

1.
College of Engineering & Technology, China University of Geoseiences, Beijing 100083, China
2.
School of Engineering, Tibet University, Lhasa 850000, China
3.
School of Geology Engineering and Geomatics, Chang'an University, Xi'an 710064, China
4.
Xi'an Engineering Investigation and Design Research Institute of China National Non-ferrous Metals Industry, Xi'an 710054, China

Received Date: 06 November 2012

Publish Date: 25 June 2013

Abstract

Abstract

According to the actual instability mode of the vertical layer rock slope, the instability calculation model and critical height calculation method under self-gravity load for the vertical layer rock slope on the basis of the Euler pressure bar instability failure method are established. Meanwhile, based on the fact that rock has initial damage, the instability model of the vertical layer rock slope based on the statistical damage model is set up, and the calculation results based on the two models above are discussed. The study result shows that the critical height of the vertical layer rock slope calculated by the method proposed in this paper is about 75% that of other researchers, which is more suitable for the actual loading characteristic and failure condition. The instability model of the vertical layer rock slope based on the rock statistical damage constitutive model not only considers the rock mechanical parameters such as elastic modulus, but also combines the characteristic of the stress-strain curve, from which the calculation result is more suitable for the actual condition. It is also found that the change of the calculation parameters m andε₀ has much effect on the calculation results, which indicates that it is very necessary to consider rock damage evolution in the similar problem.
- vertical layer rock slope /
- instability of pressure bar /
- self-gravity load /
- critical height /
- statistical damage model

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References

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