宁波市南翔桥挂篮整体同步下放施工技术

Overall Synchronous Lowering Construction Technology of Travelling Form for Nanxiang Bridge in Ningbo City

桥是跨越奉化江的1座预应力砼连续桥,主跨130 m,采用挂篮支模,组合式卷扬机牵引装置由1台卷扬机架、2台动滑轮小车。4台均衡滑轮以及1台同步控制器和2根钢丝绳组成,每根钢丝绳跟挂篮的前、后下横梁上两个固定吊点连接,通过卷扬机与滑轮组用同步控制器下放,该工程采用的组合式卷扬机牵引装置,操作简单、安装快捷,且安全性能高,对于挂篮整体同步下放取得了满意的效果。

Ningbo Nanxiang Bridge is a pre-stressed concrete continuous bridge spanning Fenghua River.Its main span is 130 m.The travel form is used for construction.The combined winch traction device is composed of 1 winch frame,2 movable pulley trolleys,4 balanced pulleys,1 synchronous controller and 2steel wire ropes.2 ropes are separately connected with two fixed hoisting points on the traverse beam in the front and back of travel form,and lowered by the synchronous controller of winch and pulley group.The combined winch traction device used for this project is easy to operate and fast installed with high safety performance,which achieves the satisfied effect for the overall synchronous lowering of travel form.