大型建筑场区工程测量控制网布设及精度保证措施

Control Network Layout and Accuracy Guaranty Measures of Large Construction Field Area Engineering Survey

大型建筑场区,根据现场踏勘情况和建筑物的设计造型相结合,布设合理的工程测量控制网,保证控制网的精度,既能快速指导工程施工,又能满足设计、施工要求。以新郑国际机场二期扩建工程T2航站楼为例,介绍测量控制网的布设和精度保证措施。通过建立同一个测量控制网,在交叉施工区域或相互衔接部位,各参建单位均使用施测的场区测量控制网成果,通过统一控制点三维坐标,相邻区域使用同一控制点,对各衔接区域进行测量放线控制,过程中加强对控制网联测及复核。实践证明,该技术效果良好。

In large construction area, according to the site survey and building combining design, engineers should design reasonable engineering survey control net and guarantee the accuracy of control net can not only guide construction but also meet the design and construction requirements. Taking the terminal T2 of Xinzheng International Airport expansion project for example, this paper introduced the design of control network and method to guarantee precision. Through setting a control network, all of the participation units using the same control network in crossing construction or interrelated parts. Then by unified 3D coordinates of the control points or using the same control point at interrelated parts and enhancing the control network survey and review, the survey accuracy can be guaranteed. It proves that good effect is got.