GPS打桩定位系统在杭州湾跨海大桥施工中的应用

GPS Pilling Positioning System for Hangzhou Bay Major Bridge

杭州湾跨海大桥位于杭州湾中部,是目前世界第一跨海长桥。介绍了海上GPS打桩定位系统的工作原理,讨论了在杭州湾跨海大桥桩基定位中利用GPS打桩系统打桩定位的方法及提高定位精度的主要措施。实践表明,该方法较常规方法具有如下优点:可实现全天候施工,减少了环境因素的制约;能够为沉桩定位提供精确的数据,保证了沉桩的质量;若将GPS打桩定位系统的现场数据发送到任意授权的固定电脑,使得任何接入互联网的地方均能够实现同步、精确、可视的打桩定位现场再现;节约成本,提高了经济效益。

Hangzhou Major Bridge is located in the middle ot Hangzhou Bay. It is the longest major phage oversea. The survey methods of Hangzhou Bay Major Bridge pilling are discussed. The principle of GPS Pilling Positioning System is introduced. The measuring technique and the main measure of enhanceing point accuracy are discussed. The practice indicated that, the method has the following merit comparing with the conventional method： working day and night~ reducing the restriction of environmental factor; providing the precise data for pining, guaranteeing the quality of pilling. If the field data of positioning system is transmitted to any fixed authorized computer, it is able to precisely realize the reappearation of pilling scene. The technique saves the cost, enhances the economic efficiency.