直壁土袋围堰配合钢管砂桩支墩在拱桥主拱圈砼浇筑中的应用

Application of sand filled steel pipe support assisted by vertical wall soil-bag cofferdam in main arch ring pouring of the arch bridge

贵阳市甲秀南路花溪拱桥采用扣件钢管架框体约束堰体为直壁土袋围堰,抽水后设置条形基础,条形基础预留孔洞,布设钢管砂桩,钢管砂桩顶设工字钢平台,工字钢平台上部及主拱圈拱脚部分设满堂架,作为主拱圈支架浇筑混凝土,施工较为简单。

Huaxi arch bridge is located on the south Jiaxiu road in Guiyang city, it adopts fastener steel pipe frame to restrict weir body in order to surround vertical wall soil-bag. It sets the piece base after the pumping, piece base reserves the hole to lay the sand filled steel pipe, the top of the sand filled steel pipe sets the i-steel platform, the top of the i-steel platform and the bottom of the main arch ring set the full-hall support, we take it as the main arch ring support to pour concrete, so that the construction is more simple.