【摘要】 大跨径悬索桥和斜拉桥的索塔都非常高,施工过程复杂,这对索塔线形测控的方法和精度提出了更高的要求。本文首先考虑地球曲率影响,提出一种改化索塔设计坐标的方法;然后讨论了一种测定索塔区域大气竖直折光系数的方法,并通过实验验证了此方法用于改正索塔高程测控时单向三角高差的可行性;最后提出采用自由设站测量新技术来测控索塔平面线形。经过分析和计算,上述方法能够提高索塔线形测控的精度和效率,使索塔线形测控结果满足设计要求。本文对指导悬索桥和斜拉桥高大索塔施工测量具有借鉴意义。更多还原

【Abstract】 The cable tower of the long-span suspension bridge and the cable-stayed bridge is really high, and the process of construction is complicated, which puts forward higher requirements for the method and accuracy of the cable tower measurement and control.In this paper, we consider the influence of the curvature of the earth firstly, and propose a method to correct the design coordinates of the cable tower. Furthermore, we discuss a method to determine the atmospheric vertical refraction coefficient of the cable tower area.We then verify the feasibility of this method for correcting one-way triangular height difference. Finally, we propose a new technology named free station measurement to measure and control the planimetric alignment of the cable tower. Based on analysis and calculation, the above method can improve the measurement accuracy and efficiency, makes the result of cable tower alignment more in line with the design requirements, and has certain reference significance for guiding the construction measurement of the cable tower of suspension bridge and cable-stayed bridge.更多还原