Test Study on the Influence of Interface of Soil and Rock on the Stability of Sandy Soil Tunnel Face

Jian Jun Tong; Ming Nian Wang; Hu Jin

doi:10.4028/www.scientific.net/AMM.226-228.1509

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 226-228Test Study on the Influence of Interface of Soil...

Test Study on the Influence of Interface of Soil and Rock on the Stability of Sandy Soil Tunnel Face

Abstract:

Through model tests, three different locations of the interface of the soil and rock in sandy soil tunnel were simulated. The failure processes of the face and the un-supported section were described. The initial and finial depth-width ratios were obtained. The failure features and mechanism were analyzed. The tests show that the longitudinal equilibrium arch in the un-supported section fist forms, and then the tunnel face damages. The failure surface shape approximates to logarithm spire curve, and it is the interface of the soil and rock when there is the interface of the soil and rock in front of the tunnel face. The interface of the soil and rock improves the stability and the depth-width ratios of the tunnel face and the un-supported section, especially when it is in front of the tunnel face.

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Periodical:

Applied Mechanics and Materials (Volumes 226-228)

Pages:

1509-1512

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.226-228.1509

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Online since:

November 2012

Authors:

Jian Jun Tong, Ming Nian Wang, Hu Jin

Keywords:

Interface of Rock, Interface of Soil, Sandy Soil, Test, Tunnel, Tunnel Face, Un-Supported Section

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