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.