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首页> 外文期刊>American journal of applied sciences >The Evaluation of the Groundwater Influence on the Stress and Strain Behavior around a Tunnel by Analytical Methods
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The Evaluation of the Groundwater Influence on the Stress and Strain Behavior around a Tunnel by Analytical Methods

机译：地下水对隧道应力和应变行为影响的解析法评价。

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摘要

The presence of an aquifer in the soil 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 state of the soil and causes an increase in the thickness of the plastic zone. As a result the loads transmitted on the lining increase. In this study a calculation procedure by finite differences method, able to determine the stress and strain state of the soil in the presence of the water flow in the pores, is presented. More particularly, using the proposed procedure, it is possible to determine the convergence-confinement curve of the tunnel and the trend of the plastic radius varying the internal pressure. A calculation example is used to detect the great influence that the presence of the aquifer has on the stress and strain state of the soil and on the pressure-displacement relationship of the tunnel wall.
机译：土壤中含水层的存在会导致隧道稳定性条件的相关方式发生变化。实际上，孔隙中的水流会改变土壤的应力和应变状态，并导致塑料区域厚度增加。结果，在衬里上传递的负载增加。在这项研究中，提出了一种利用有限差分法的计算程序，该程序能够确定孔隙中存在水流时土壤的应力和应变状态。更具体地，使用所提出的程序，可以确定隧道的会聚-约束曲线以及改变内部压力的塑性半径的趋势。计算实例被用来检测含水层的存在对土壤的应力和应变状态以及对隧道壁的压力-位移关系的巨大影响。

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