Estimation of Elastic Moduli of Non-persistent Fractured Rock Masses

Yang, Jianping; Chen, W. Z.; Yang, Diansen; Tian, Hongming

doi:10.1007/s00603-015-0806-y

Cited by 17 publications

(1 citation statement)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some other works were concentrated on the laboratory experiment to verify the confining pressure effect on the Young's modulus, and some empirical equations were obtained (You et al, 2003;Arslan et al, 2008;Wang et al, 2009;Cai et al, 2015;Yang et al, 2016). However, the attempt to describe the exact influence of the confining pressure-dependent Young's modulus of rock mass in the ground reaction analyses is quite few.…”

Section: Introductionmentioning

confidence: 99%

Influence of confining pressure-dependent Young’s modulus on the convergence of underground excavation

Jiang

Guan

et al. 2019

Tunnelling and Underground Space Technology

View full text Add to dashboard Cite

The actual convergence of an excavation located in fractured rock mass or the soft rock is largely different with the theoretical result in many cases. Experimental results showed that the influence of confining pressure on Young's modulus is very significant. This paper attempted to illustrate the influence of the confining pressure-dependent Young's modulus in the ground reaction analyses of mountain tunnel. Firstly, the relationship between Young's modulus and confining pressure was described as a non-linear function according to the test results. Based on the plane strain axial symmetry assumption and the incremental theory of plasticity, equilibrium equations and compatibility equations of rock mass around a circular tunnel were deduced theoretically. Based on fourth Runge-Kutta method, a semi-analytical solution was achieved. Considering the effect of confining pressure on Young's modulus, the stress and deformation of rock mass around tunnel was calculated by both analytical and numerical methods. The influence of confining pressure-dependent Young's modulus in surrounding rock was estimated quantitatively. Finally, Tawara saka Tunnel in Japan was taken as an example to explain the influence of confining pressure-dependent Young's modulus. The results showed that the error with respect to the monitoring data was largely reduced with the confining pressure-dependent Young's modulus model, which indicated the necessity of considering the non-uniform distribution of Young's modulus.

show abstract

Section: Introductionmentioning

confidence: 99%