| 摘要 |
PURPOSE:To improve efficiency at sectional placement of concrete in the breadthwise direction using a traveling form by arranging hollow tubes in the breadthwise direction, and by binding sectionally placed concrete into a body with tendons inserted through the hollow tubes after curing of the concrete. CONSTITUTION:With a traveling arched timbering A, concrete B1 is placed first to a section of the side (a) of the whole breadth L with hollow tubes 16 arranged therein. Then the arched timbering A is made to travel toward the side (b) and concrete B2 is placed thereto, as in the case of the side (a), with the hollow tubes 16 arranged therein. After completion of curing of the concrete B1 and B2, the hollow tubes 16 are joined to communicate one another and tendons are inserted therethrough and tension is applied thereto making the concrete B1 and B2 united into one body. Thereby efficient and sure construction of the arched concrete can be attained. |
