RTK在南水北调中线工程顶管贯通中的应用

Application Research on RTK in the Traversing Engineering of Pipe Jacking in the Middle Route Project of South to North Water Diversion

针对顶管技术无需开挖的施工特点,结合南水北调中线工程焦作段某顶管贯通工程的具体实例,提出了RTK测量应用于短距离顶管贯通的方法.对比分析了导线测量、三角网测量、RTK测量3种方法在顶管贯通过程中的测量精度水平,用导线法和权函数法来计算贯通误差.计算结果表明:RTK测量技术完全满足该顶管贯通工程的精度要求,在短距离顶管贯通工程中可以代替导线测量和三角网测量建立顶管贯通测量控制网,并且其具有速度快、受地形条件影响小的特点,在短距离顶管贯通中具有较好的适用性.

Considering the features of pipe jacking technology with no excavation,and combining with the example of the traversing engineering of a pipe jacking in Jiaozuo section in the Middle Route Project of South to North Water Diversion,we proposed a method that applied RTK measure technology to the short-distance traversing engineering of pipe jacking,the precision levels of three measure methods applied to traversing of pipe jacking were comparatively analyzed,three methods were traverse survey,triangulation measure,RTK measure,and the traversing errors were calculated by traverse survey and weight functions.The computing results show that RTK measure technology completely satisfies the precision requirements of traversing engineering of pipe jacking project.In the short-distance traversing engineering of pipe jacking,this technology can replace the traverse survey and triangulation measure with the surveying control network of traversing engineering of pipe jacking,and has the characteristics of fast speed and little influences from terrain conditions.Thus,RTK measure technology has better applicability in the short-distance traversing engineering of pipe jacking project.