Tunnel Strength and Excavation Effect under Different Stress Paths

Zhi Li Sui; Zhao Guang Li; Zhi Jun Yang; Ran Shen; Xu Peng Wang; Wen Li Li

doi:10.4028/www.scientific.net/AMM.470.902

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 470Tunnel Strength and Excavation Effect under...

Tunnel Strength and Excavation Effect under Different Stress Paths

Abstract:

The stress path division of soil strata surrounding the excavation tunnel was obtained by numerical simulation, and based on this, the impact variation of different stress paths to the surrounding soil strength was gotten by laboratory triaxial test. The results show that tunnel excavation can result in four different stress path divisions of the soil strata, which have deferent failure to the tunnel stability. Deferent paths have respective failure forms, and the failure strengths are basically the same when the forms are identical (extrusion failure or compression failure) even if the paths are different, but to deferent forms, the failure strength are deferent, generally speaking, the strength of extrusion failure will be 10% ~25% lower than that of compression failure. These researches can provide strong basis for accurately study about the influence of engineering property of environmental soil strata.

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Periodical:

Applied Mechanics and Materials (Volume 470)

Pages:

902-906

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.470.902

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Online since:

December 2013

Authors:

Zhi Li Sui, Zhao Guang Li, Zhi Jun Yang, Ran Shen, Xu Peng Wang, Wen Li Li

Keywords:

Construction Disturbance, FLAC, Stress Path, Triaxial Test, Tunnel

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References

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