Analysis of limit support pressure on tunnel face below the river bed

作者：Liu Weiping; Wu Wen; Hu Lina; Yang Yongxuan

来源：International Journal of Simulation: Systems, Science and Technology , 2016, 17(39): 16.1-16.6.

DOI：10.5013/IJSSST.a.17.39.16

• Earth pressure theories
• Limit equilibrium
• Limit equilibrium methods
• River bed
• Support pressure
• Tunnel excavation
• Tunnel face
• Water pressures

Appropriate controlling of support pressure on the tunnel face can ensure tunnel excavation safety. This paper presents a limit equilibrium method to consider the water pressure in river for determine the limit support pressure on the tunnel face. The formula to calculate the limit support pressure on the tunnel face is based on the limit equilibrium theorem and Terzaghi earth pressure theory. The results obtained by proposed method considering water pressure in river are presented and compared with those based on the finite difference method FlAC3D. A comparison shows close agreement between results with limit equilibrium method and numerical method. The proposed method is efficient to compute the limit support pressure on the tunnel face. The limit support pressure with the limit equilibrium method is greater than that with the numerical method. It is safety for the stability of tunnel face when the limit equilibrium method is used to calculate the limit support pressure.

• 出版日期2016