山区峡谷大跨悬索桥主缆架设GNSS基线解算及模糊度分析

GNSS Baseline Solution and Ambiguity Analysis for Main Cable Traction of Long-Span Suspension Bridges in Mountainous Canyons

摘要: 本文针对山区悬索桥主缆架设过程中测量精度不足、效率低、实时性差等关键问题，基于北斗卫星导航系统的高精度定位技术，研究了多基站联合RTK解算、模糊度固定优化及网平差算法，提出一种模型与数据相结合的部分模糊度固定策略和评估方法。进一步将该方法应用于贵州山区某在建峡谷大跨径悬索桥的主缆架设施工定位测量及调索工作当中，实现了毫米级实时动态监测与智能化主缆架设，显著提升了施工精度和效率。本研究为山区复杂环境下长大桥梁建设工程提供国产化自主可控的技术解决方案。

Abstract: The key issues, such as insufficient measurement accuracy, low efficiency, and poor real-time performance during the main cable traction process of suspension bridges in mountainous areas are studied in this paper. The multi-base station joint RTK solution, ambiguity fixation optimization, and network adjustment algorithm, and proposes a partial ambiguity fixation strategy and evaluation method (combining model and data) is analyzed via the Beidou Global Navigation Satellite System (GNSS). This method was applied to the positioning measurement and cable adjustment work of the main cable traction construction of a canyon bridge under construction in the mountainous area of Guizhou Province. It achieved millimeter-level real-time dynamic monitoring and intelligent main cable traction, significantly improving the construction accuracy and efficiency, and providing a domestic, independent and controllable technical solution for the construction of long bridges in complex mountainous environments.