| 摘要 |
PURPOSE:To shorten the period of construction as well as reduce the cost of construction for basement by a method in which underground columns are constructed, a formwork is hung down and fixed through a hanging mechanism, concrete is placed, the ground below the formwork is excavated, and the hanging mechanism is extended to the next underground stage. CONSTITUTION:Plural underground columns 4 are constructed, and a formwork 10 for the first floor under the ground is hung down and fixed through a hang ing mechanism H from the columns 4. Concrete is placed into the formwork 10, and the ground below the formwork 10 is excavated. The mechanism H is then extended to the next underground floor, the formwork 10 for the floor is hung down and fixed, and concrete is placed into the formwork 10. These processes are repeated to construct plural underground floors in order from above to below. The period of construction can thus be greatly shortened, and assembling and disassembling operations for formworks and timbering work in places where working conditions are bad can be lessened. |
