运营期隧道地下水位变化情况估算

发布时间：2018-02-22 11:16

本文关键词： 隧道地下水位涌水量地下水平衡　出处：《铁道科学与工程学报》2017年02期 　论文类型：期刊论文

【摘要】：对于隧址区地下水位较高的隧道,通常采用堵水限排的方式处理地下水,而在隧道水长期排放的过程中难免对地下水位降深造成影响,超过一定限度必将引起隧址区生态环境的恶化。而隧道整个运营期较长,对隧址区地下水位实时掌控是有必要的。基于对比分析、地下水动力学方法及达西定律确定运营期隧道围岩涌水量及透过初衬涌水量计算方法,根据渗流连续性得出地下水位高度反分析计算方法,在隧道排水量、围岩渗透系数和初衬渗透系数已知的情况下即可求得地下水位高度。通过案例分析及与实际工程的对比确定了该方法的有效性。该方法能为运营期隧道隧址区地下水位高度估算提供参考,从而为隧址区地下水平衡保护提供依据。
[Abstract]:For tunnels with high groundwater level in tunnel site, groundwater is usually treated by water plugging and drainage, but it is inevitable to affect the depth of groundwater level during the long-term discharge of tunnel water. If the tunnel exceeds a certain limit, it will cause the deterioration of the ecological environment in the tunnel area. However, the whole operation period of the tunnel is relatively long, so it is necessary to control the groundwater level in the tunnel site in real time. The groundwater dynamic method and Darcy's law are used to determine the calculation method of surrounding rock discharge and initial lining discharge of tunnel during operation period. According to the continuity of seepage flow, the backanalysis and calculation method of groundwater level height is obtained, and the displacement of tunnel is obtained. When the permeability coefficient of surrounding rock and the permeability coefficient of initial lining are known, the height of groundwater level can be obtained. The effectiveness of this method is determined by case analysis and comparison with actual engineering. The method can be used for tunnel site area in operation period. The estimation of the lower water level provides a reference. Thus, it provides the basis for the groundwater balance protection in the tunnel area.
【作者单位】：中南大学土木工程学院;国防科学技术大学基础教育学院土木工程系;
【基金】：国家自然科学基金资助项目(51538009,51478477,51508562,51508563)
【分类号】：U456.3

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