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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

第14卷    第2期    总第83期    2017年2月

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文章编号:1672-7029(2017)02-0303-05
运营期隧道地下水位变化情况估算
尹泉1,程盼2,傅鹤林1,周林瑄2,刘畅2

(1. 中南大学 土木工程学院,湖南 长沙 410075;
2. 国防科学技术大学 基础教育学院土木工程系,湖南 长沙 410072
)

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。

 

关键字: 隧道;地下水位;涌水量;地下水平衡

Calculation of underground water level for tunnel in operation period
YIN Quan1, CHENG Pan2, FU Helin1, ZHOU Linxuan2, LIU Chang2

1.School of Civil Engineering, Central South University, Changsha 410075, China;
2. College of Basic Education, National University of Defense Technology, Changsha 410073, China

Abstract:The method of “Blocking ground water and limiting discharge” is widely applied to deal with the groundwater of the tunnel with high groundwater table. However, it is inevitable to have the influence on the drawdown of the groundwater table when drains perpetually, if the level exceeds a certain limit. It will cause the deterioration of ecological environment. The operational period of a tunnel is usually so long that it is essential to real-time control the groundwater table. The calculation method of water inflow of surrounding rock and the lining of the tunnel was determined based on the contrastive analysis, groundwater dynamics method and Darcy''''s law, and then according to the seepage continuity, the back analysis method of groundwater table was obtained. Under the conditions of the tunnel flow rate, the permeability coefficient of surrounding rock and lining were known, the groundwater table can be obtained. It was proved to be effective by case study and the comparison of real project. This method can provide a reference to the groundwater table of the tunnel for operational phase as well as the basis of groundwater balance protection.

 

Key words: tunnel; groundwater table; water inflow; groundwater balance

ISSN 1672-7029
CN 43-1423/U

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