Abstract:

Taking the concrete construction of the water intake vertical shaft of Zhouning hydropower works as an example, the authors present such measures as preserving the rock plugs, installing safety separation platforms and shaft sinking section by section, which are taken to divide the deep vertical shaft into short shafts so as to reduce the construction difficulty. Furthermore, the concrete construction is carried out in parallel to the shaft sinking construction and grouting construction so as to minimize the construction period of the vertical shaft. The authors also present such new technologies as hydraulic slip formworks, straight thread connection of rebars, droppingprevention of hoisting cages. Therefore, a set of safe and quick construction method for deep vertical shafts is formed. Finally, the authors present the assistant systems for the concrete construction of the vertical shaft.