Analytical research on groundwater seepage and reinforcement parameters of mountain tunnels

作者：Liu, Fu-Sheng^*; Xu, Guo-Yuan; Huang, Wen-Tong

来源：Journal of South China University of Technology(Natural Science Edition), 2012, 40(2): 112-117+123.

DOI：10.3969/j.issn.1000-565X.2012.02.020

• Analytical research
• Circular tunnels
• Drainage condition
• Ground water discharge
• Groundwater seepage
• Grouting reinforcements
• Seepage discharge
• Seepage pressure

In order to investigate the seepage pressure and discharge of mountain tunnels and reveal the effect of grouting reinforcement parameters on groundwater seepage, the distribution law of seepage pressure and the formulas of seepage discharge are deduced based on the assumption that there exists a radial stable and isotropic seepage around a circular tunnel. Then, a case study is performed. It is found that the distribution of the seepage pressure is nonlinear and that the reinforcement rim and the primary support greatly reduce the seepage pressure loading on the lining and the groundwater discharge in drainage conditions. The seepage discharge of the unlined tunnel calculated by the proposed formulas is close to the actual monitoring data, which means that the proposed method is feasible in evaluating the water inflow of similar tunnels. Moreover, according to the correlation between the reinforcement parameters and the seepage pressure as well as the seepage discharge, it can be deduced that, with the decrease in the permeability coefficient and with the increase in the reinforcement rim thickness, both the seepage pressure on the secondary lining and the seepage discharge decrease sharply at first, and then remain unchanged when the reinforcement parameters increase to certain values.

• 出版日期2012-2
• 单位华南理工大学