全站仪竖直高程传递技术及其在苏通大桥测控中的应用

高程基准传递是高大建筑物施工测控中重要项目之一,不同的工程因用途不同对高程控制提出不同的精度要求。针对苏通大桥高索塔施工中高程测控的要求,分析水准测量、钢尺高程传递、三角高程测量等常用高程传递技术的适用范围与缺点,它们均不适用于大高差的高精度传递。为此,提出全站仪竖直高程传递技术。详细论述其基本原理,对误差来源、大小进行分析,对所达到的精度进行评估,并研制传递高程的实用装置,经现场试验对比分析,验证该技术方法的可行性与有效性。理论分析与试验验证显示该技术方法对于数百米的高程传递,可以达到国家二等水准精度水平,完全满足建筑物高程测控的需要。最后将该技术成功应用在苏通大桥300m高索塔的高程测控中。

Total station height transmission technology and its application in height control of Sutong Bridge tower construction

Aiming at precision requirement of height control in tower construction of Sutong Bridge,Some commonly methods used height transmission are analyzed simply such as leveling measurement,steel tape method and trigonometric leveling measurement,they can not fit to large height transmission in high precision.Then the total station height transmission technology is proposed.The basic principle is demonstrated,the errors origin and size is analyzed and precision is estimated.According to the principle,an appropriate equipment is developed.Through the experiment and compare analysis,the feasibility and the validity of this technical method is proved.Principle analysis and experiment show that the precision of this technology can reach the precision of national second-class leveling,can meet the height precision of building construction.The technology has been applied in the tower construction surveying of Sutong Bridge.