南京大胜关长江大桥控制测量的“三网合一”

"Combined Three Networks" for Control Survey of Dashengguan Changjiang River Bridge in Nanjing

针对南京大胜关长江大桥线下工程测量精度要求高、轨道铺设平顺性要求高与运营监测周期长等特点,采用勘察设计控制网、施工控制网和运营维护控制网合为一体的"三网合一"控制测量技术。对基础平面控制网(CPⅠ)、线路控制网(CPⅡ)和基桩控制网(CPⅢ)三级平面控制网和高程控制网的布设、测量及数据处理进行论述。

In the light of the characteristics that the requirements for survey precision and rail track laying smoothness of Dashengguan Changjiang River Bridge in Nanjing are high and the period of operation monitoring of the Bridge is long, the control survey techniques of combining three networks of the reconnaissance and design control network, construction control network and operation and maintenance control network into one are adopted. This paper deals with the layout, survey and data processing of the three levels of the horizontal control network and elevation control network of the foundation control network （CP Ⅰ ）, alignment control network （CP Ⅱ ） and foundation pile control network （CPⅢ） of the Bridge.