Fracture Strength Model for Jointed Rockmass and Its Application to Engineering

Abstract:

There are large number of intermittently jointed cracks in rockmass, which exist in rockmass as a kind of initial damage. It is their damage, propagation and propagating interaction that result in a variety of failure forms of rockmass. This paper conducts an in depth research on the influence of cracks propagation interaction upon fracture strength of jointed rockmass. A kind of fracture strength model for jointed rockmass is developed under three-dimensional stress conditions. With the utilization of this model in a large-scale highway slope project, the design and construction are effectively performed and remarkable economic benefit has been achieved.

• Periodical: Key Engineering Materials (Volumes 306-308)
• Pages: 1379-1384
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.306-308.1379
• Online since: March 2006
• Authors: Qiang Yong Zhang, Wei Shen Zhu, Shu Cai Li, W. Xiang
• Keywords: Crack Propagation Interaction, Fracture Strength Model, Jointed Rock Mass, Slope Engineering of Jointed Rockmass

References

[1] D.Y. Liu: Research on Shear-Compressed Fracture Strength Properties of Discontinuous Jointed Rockmass [Ph. D. Thesis]. Chongqing College of Architectural Angineering, China, (1993).

[2] W.S. Zhu, S.C. Li, W.Z. Chen: Failure Mechanism and Anchorage Effect of Jointed Rockmass and Its Application in Engineering. Chinese Science Press, Beijing, (2002).

[3] H. Horii and S. Nemat-Nasser: Compression-Induced Microcrack Growth in Brittle Solids: Axial Splitting and Shear Failure. J. Geophys. Res., Vol. 90(1985), pp.3105-3125.

DOI: 10.1029/jb090ib04p03105

[4] M.F. Ashby and S.D. Hallam: The Failure of Brittle Solids Containing Small Cracks Under Compressive Stress States. Acta Metall. Vol. 34(1986), pp.497-510.

DOI: 10.1016/0001-6160(86)90086-6

[5] G.L. Xu and H.M. Tang: Structure Model of Rockmass and its Application. Chinese Geology University Press, Wuhan, (1993).

[6] L.N. Germanovich and A.V. Dyskin: Mechanics of 3-D Crack Growth Under Compressive Loading. Rock Mechanics, Balkema Press, Rotterdam, (1996).

[7] A.V. Dyskin and L.N. Germanovich: A Model of Fault Propagation in Rocks Under Compression. Rock Mechanics, Balkema Press, Rotterdam, (1995).

[8] Q.Y. Zhang, S.C. Li and W.Z. Chen: Application of Fracture Failure Strength Model to Support for Large Scale Oil-Depot Rock Slope. Chinese Journal of Rock Mechanics and Engineering, Vol. 23, No. 20(2004), pp.3504-3508.

[9] W.S. Zhu, Q.Y. Zhang and S.C. Li: Brittle Elastoplastic Damage Constitutive Model for Jointed Rockmasses and Computation Concerning Bolt-reinforcement. International Journal of Damage Mechanics, Vol. 12, No. 1(2003), pp.65-84.

DOI: 10.1177/1056789503012001004

[10] Q.Y. Zhang and W.S. Zhu: A Reinforcement Model of Damaged Cylindrical Bolt Element for Jointed Rockmass and its Application. Chinese Journal of Rock and Soil Mechanics, Vol. 19, No. 4(1998), pp.9-24.