基于JSCORS建立桥梁施工控制网的可行性研究

Application of JSCORS in Bridge Construction Control Network

江苏省全球导航卫星连续运行参考站服务系统(JSCORS)是国内首个覆盖全省范围的全球导航卫星连续运行参考站网络,具有动态实时定位、精度高、作业效率高的特点,现已广泛应用于各个领域。提出了一种在非特大型桥梁施工项目中应用JSCORS网络RTK模式布设首级施工控制网的方法,并与常规建网结果进行对比,结果发现,JSCORS观测的平面坐标内附合精度基本在1cm以内,精度相对较高,可满足本项目的平面位置观测成果要求;高程内附合精度在2cm左右,精度略差,基本满足本项目四等水准观测成果要求。解决了桥址区国家等级控制点缺失的问题,可为类似项目提供合理高效的应用经验。

Jiangsu Continuously Operation Refer-ence Station(JSCORS)is the first network of continuous navigation reference stations covering the whole province.It has the characteristics of dynamic real-time positioning,high precision and high operating efficiency.It has been widely used in various fields.A method for deploying the first-level construction control network using JSCORS network RTK mode in non-super large bridge construction projects is proposed.Compared with the results of conventional network construction,it is found that,the accuracy of JSCORS observation in plane coordinates is less than 1 cm.The precision is relatively high,which can meet the requirements of the plane position observation results of this project.The accuracy of the attachment in the elevation is about 2 cm.The precision is slightly poor,which basically meets the requirements of the fourth-level observation results of the project.It solves the problem of the lack of national level control points in the bridge area,and provides reasonable and efficient application experience for similar projects.