Pushing construction method of double-width steel box girder: Fid-Bau Portal

Pushing construction method of double-width steel box girder

YU CHANGBIN / HE CHANGSONG / TIAN BO / DONG JIANGANG / LI HUIMIN / ZHANG YANJUN

The invention relates to steel box girder construction, in particular to a pushing construction method of a double-width steel box girder. The method comprises the following steps that A, a construction platform is erected; B, pushing equipment is installed; C, the left section of the steel box girderis pushed, and the steel box girder is jacked by 3-5cm by using a hydraulic jack after the pushingis finished; D, the pushing cushion block is arranged below the steel box girder, the hydraulic jack falls back, the pushing cushion block supports the steel box girder, and the pushing cushion blockis stressed; E, the walking type pushing machine is pulled to the right side through a winch, the step C and the step D are repeated, and pushing of the same section of the steel box girder is conducted; and F, the walking type pushing machine is transversely moved back and forth until the whole left and right multi-section steel box girders are pushed. The pushing work of the left and right steel box girders is completed by using one set of walking equipment, the construction is simple, the investment equipment is less, the left and right positions of the pushing equipment are freely switched, and the construction efficiency is high.

本发明涉及钢箱梁施工，特别是一种双幅钢箱梁的顶推施工方法。包括如下步骤：A、搭设施工平台；B、顶推设备的安装；C、进行左幅一段钢箱梁的顶推工作，顶推完成后，用液压千斤顶将钢箱梁顶升3厘米至5厘米；D、将顶推垫块置于钢箱梁的下方，回落液压千斤顶，顶推垫块支撑钢箱梁，使顶推垫块受力；E、通过卷扬机将步履式顶推机拉至右幅，重复步骤C和步骤D，进行同段钢箱梁的顶推；F、来回横向移动步履式顶推机，直至整个左右两幅多段钢箱梁顶推完成。本发明通过使用一套步履设备完成了左右幅钢箱梁的顶推工作，本发明施工简单，投入设备少，自由倒换顶推设备左右幅位置，施工效率高。

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