Abstract：
The controlled drainage meets demands of both mitigating the water pressure on linings and maintaining the ecological balance in tunnel area. In a practical project, not only is it necessary to calculate the allowable drainage from the perspective of engineering safety, but also consider the habitation drinking and plants growth. In this paper, a steady flow model for tunnel drainage calculation is established based on Dupuit hypothesis in view of ecological environment protection. A calculation method for allowable water drainage is derived in light of the permitted dewatering level, and the control measures for tunnel drainage focusing on grouting are proposed. All this above provides a theoretical basis for ecological environment protection in tunnel area.
2014, Vol. 51 