| 摘要 |
PURPOSE:To raise the resistance against vibration during the placing period of concrete in the construction of arched concrete by using arched form timbering. CONSTITUTION:A timbering A formed by combining semi-arch trusses 3 is set between leg structures 1, and arched concrete is placed on it. In this case, a strong vibration-resistant structure C is projectionally provided to the structures 1 in the direction of the arched concrete up. In the placement of arched concrete by groups, the structure C is first integrally combined, concrete is placed in order for each desired placing section, and finally concrete is placed between the concrete in the section (b1) placed in the first place and the structures 1 in such a way as to bury the structure C. |
