| 摘要 |
PURPOSE: To economize the construction of arch-concrete formwork. CONSTITUTION: Arched formwork timbering A is suspended between leg structures, and casting of concrete to be cast on formwork 4 is carried out separately for a crown portion a1 and for other arch portions a2 , a2 . First, concrete for the arch portions a2 , a2 is placed and in that case a compression resisting material 8 is placed between the upper end faces of the arch portions a2 , a2 so that an arched structure where the arched portions a2 , a2 are coupled to the compression resisting material 8 is formed while the arched portions a2 , a2 are connected to formwork timbering B by a connector 10. After the concrete of the arch portions a2 , a2 is set, concrete is placed for the crown portion a1 . |
