Pushing construction method of bridge steel box girder with slope: Fid-Bau Portal

Pushing construction method of bridge steel box girder with slope

DING HAIXU / ZHONG AIJUN / WEI XINHUA / BIAN FANGYIN / CHEN ZHEBIN

The invention relates to a pushing construction method of a bridge steel box girder with a slope, and the method comprises the following steps: taking the pushing direction of the steel box girder asthe front, constructing a plurality of temporary support jig frames on the rear sides of buttresses at the tail end, increasing the heights of the temporary support jig frames in sequence, and constructing a temporary support jig frame between every two adjacent buttresses at the same time; arranging a joist device used for bearing the steel box girder and a pushing slide way on the temporary supporting jig frame and the buttresses; installing a guide beam, and fixedly connecting the prefabricated segmental steel box girder with the guide beam; installing a dragging jack at a target position,installing an anchor pulling device connected with the dragging jack, and dragging the anchor pulling device by the dragging jack so as to drive the segmental steel box girder and the guide beam to move towards the target position; when the guide beam slides out of the pushing slide way, enabling the tail end, away from the dragging jack, of the segmental steel box girder to be fixedly connected with the rest segmental steel box girders, and repeatedly performing the actions till all the segmental steel box girders reach the designated position.

本申请涉及一种具有坡度的桥梁钢箱梁的顶推施工方法，包括：以钢箱梁的顶推方向为前方，在尾端处的支墩的后侧搭建若干个临时支撑胎架，临时支撑胎架的高度依次递增，同时在每相邻两个支墩之间搭建临时支撑胎架；在临时支撑胎架及支墩上设置用以承载钢箱梁的托梁装置、及顶推滑道；安装导梁，并将预制好的节段式钢箱梁与导梁固定连接；将拖拉千斤顶安装于目标位置，并安装与拖拉千斤顶连接的拉锚器，拖拉千斤顶牵引拉锚器继而带动节段式钢箱梁及导梁朝向目标位置移动；当导梁滑移出顶推滑道时，在远离拖拉千斤顶的节段式钢箱梁的尾端处固定连接剩余的节段式钢箱梁，重复上述动作，直至全部节段式钢箱梁到达指定位置。

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