岩石隧道衬砌渗透水的影响因素及防治措施

Influencing Factors and Prevention Measures of Seepage Water in Rock Tunnel Lining

为分析隧道渗透水的危害,将达西定律带入能量守恒定律,导出隧道衬砌渗水压力的计算公式,从而得出影响隧道衬砌渗水压力的各个因素。以某隧道为例建立有限元模型,分析隧道衬砌应力随水位差和水头损失的变化情况,找出应力最大的位置。综合考虑应力分析结果及隧道衬砌渗水压力的影响因素,从水位差(储水量)、岩体、衬砌等方面提出防治隧道渗透水的措施。

This paper analyzes the harm of seepage water of the tunnel.Darcy′s Law is brought into the energy conservation law to derive the formula of calculating the seepage water pressure of tunnel lining so as to obtain the factors of influencing the seepage water pressure of tunnel lining. Take a tunnel as an example to establish its finite element model. Then, the paper analyzes the change of tunnel lining stress with water level differences and head losses to find out the maximum part of stress. In view of all the stress analysis results and the influencing factors of the seepage water pressure of tunnel lining, the measures to prevent and control the tunnel seepage water are put forward from the aspects of water level difference (water storage), rock body, lining and so on.