Mechanical Calculation for Collapse Mechanism of Surrounding Rock on Shallow Tunnel

Ying Peng; Jun Sheng Yang; Yan Hua Shen; Jian Hua Liu

doi:10.4028/www.scientific.net/AMM.580-583.1148

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 580-583Mechanical Calculation for Collapse Mechanism of...

Mechanical Calculation for Collapse Mechanism of Surrounding Rock on Shallow Tunnel

Abstract:

The upper bound method of limit analysis is used for surrounding pressure calculation of shallow tunnel. Two rigid-block translational collapse mechanisms are assumed for shallow tunnel and the corresponding formulas are deduced. The earth pressure of shallow tunnel has been transformed into a mathematic optimization problem, we can get optimization solutions for the surrounding rock pressure by corresponding calculating program. It is concluded that the upper bound method of limit analysis is a feasible approach for the determination of surrounding pressures on shallow tunnel.