南京五桥钢混组合塔测量控制

The Survey and Control of Steel-concrete Composite Pylon of the Fifth Nanjing Yangtze River Bridge

南京五桥索塔测量是整个索塔工程施工质量控制的关键。区别于钢塔与常规混凝土塔施工测量,钢混结合塔施工测量需要解决的重难点是新工艺、新施工方法对索塔线形控制测量带来的难题。为了提高南京五桥索塔施工测量控制精度,重点对索塔测点的布置、索塔专用控制网的建立、索塔施工测量方法、索塔隐蔽点测量以及索塔'摆动临界点'等一系列施工难题进行了研究,并提出了解决办法。索塔施工完成后,通过对南京五桥索塔测量控制的实施与验证,各项指标均优于评定标准及规范要求。该研究的内容和方法,对今后类似工程有一定指导作用。

The Fifth Nanjing Yangtze River Bridge cable bent tower measurement is the key to the quality control of the entire cable bent tower construction.Different from steel tower and conventional concrete tower construction measurement,the key difficulty to be solved in steel and concrete combined tower construction measurement is the new technology and new construction method Control the challenges of measurement.In order to improve the measurement and control precision of The Fifth Nanjing Yangtze River Bridge cable bent tower construction,the layout of the cable bent tower,the establishment of the special control network of the cable bent tower,the measurement method of the cable bent tower construction,the measurement of the hidden point of the cable bent tower,and the'swing critical point'of the cable bent tower is focused on in the reasch.A series of construction problems were studied and solutions were proposed.Through the implementation and verification of the measurement control of the The Fifth Nanjing Yangtze River Bridge,after the completion of the construction of the tower,all the indicators are better than the requirements of the assessment standards and specifications.The contents and methods of the study have a certain guiding role for similar projects in the future.