Abstract
To satisfy the operational capacity and structural safety requirements of larger flow rates under urban flood risk, a new baffle-drop shaft with two wet sides has been proposed. A turbulence mathematical model is established to simulate the hydraulic characteristics of traditional and new shafts, when the dimensionless flow rate(Q*) ranges from 0.1 to 0.25. Compared to that of the traditional shaft, the operational capacity of the new shaft is larger. The drainage of the new shaft is still smoother, but water blockage occurs in the traditional shaft. The pressure in the new shaft walls and baffles is smaller than that of the traditional shaft. The energy dissipation rate is higher than that of the traditional shaft. Consequently, this research could provide more reasonable design for dropshafts in deep tunnel drainage systems.
Published Version
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