The Evaluation of the Groundwater Influence on the Stress and Strain Behavior around a Tunnel by Analytical Methods | Science Publications

American Journal of Applied Sciences

Pierpaolo Oreste¹ 

关键词: Tunnel Stability;    Deep Tunnel;    Circular Tunnel;    Underwater Tunnels;    Convergence-Confinement Curve;    Groundwater;    Tunnel Support;    Excavation Face;    Pore Pressure;    Stress and Strain Around the Tunnel;   

DOI  :  10.3844/ajassp.2015.734.741

学科分类：自然科学（综合）

来源: Science Publications

【 摘 要 】

The presence of an aquifer in thesoil causes a change in a relevant way of the stability conditions of a tunnel.The flow of water in the pores, in fact, modifies the stress and strain stateof the soil and causes an increase in the thickness of the plastic zone. As aresult the loads transmitted on the lining increase. In this study acalculation procedure by finite differences method, able to determine thestress and strain state of the soil in the presence of the water flow in thepores, is presented. More particularly, using the proposed procedure, it ispossible to determine the convergence-confinement curve of the tunnel and thetrend of the plastic radius varying the internal pressure. A calculationexample is used to detect the great influence that the presence of the aquiferhas on the stress and strain state of the soil and on the pressure-displacementrelationship of the tunnel wall.

【 授权许可】

Unknown