1、工程简介宁波市大沙泥桥 (又名琴桥 )位于宁波市中心 ,大桥全长 2 93米 ,其中主跨 12 0ｍ ,横跨奉化江。主跨桥中心轴线位置设有单根扁圆形钢管拱肋 ,拱肋断面尺寸为 :高 2ｍ×宽 3 3ｍ。拱肋由两道竖向扁园形钢管通过上、下两块钢板焊接而成。全跨钢拱肋轴线弧长 10 5 5ｍ Brief introduction of the project Ningbo Dashaqiao (aka Qinqin Bridge) is located in the center of Ningbo, with a total length of 2 93 meters, of which the main span is 120 meters and crosses the Fenghua River. The main span of the bridge center axis position with a single oblate steel pipe arch rib arch section size: height 2m × width 33m. Arch ribs by two vertical flat-shaped steel pipe through the upper and lower two welded steel plate. Full span steel arch rib axial length of 10 5 5m