测绘通报 ›› 2018, Vol. 0 ›› Issue (10): 107-112.doi: 10.13474/j.cnki.11-2246.2018.0326

• 技术交流 • 上一篇    下一篇

大跨径桥梁运营期GPS/BDS动态形变监测及分析

刘志强, 岳东杰, 郑德华   

  1. 河海大学地球科学与工程学院, 江苏 南京 210098
  • 收稿日期:2018-01-29 出版日期:2018-10-25 发布日期:2018-10-31
  • 作者简介:刘志强(1981-),男,博士,主要研究方向为卫星大地测量数据处理及应用。E-mail:zqliuer@163.com
  • 基金资助:
    国家自然科学基金(41604018);江苏省产学研前瞻性联合研究项目(BY2015002-04)

Dynamic Deformation Monitoring and Analysis for Long-span Bridges in Operation Based on GPS/BDS Observations

LIU Zhiqiang, YUE Dongjie, ZHENG Dehua   

  1. School of Earth Sciences and Engineering, Hohai University, Nanjing 210098, China
  • Received:2018-01-29 Online:2018-10-25 Published:2018-10-31

摘要: 随着大跨径桥梁跨越宽度的日益增大,其损伤识别和安全监测问题较常规桥梁更加突出。处于正常运营状态的大跨径桥梁,其蠕动变形幅值相对较小,且变化缓慢。现有GNSS-RTK技术受定位精度制约,并不能完全满足大跨径桥梁的高精度变形监测。针对该缺陷,本文尝试采用基于GPS/BDS观测数据的连续准静态模式监测大跨径桥梁动态变形,并以苏通大桥为例进行主桥外部变形监测试验;分别对GPS单系统、BDS单系统及GPS/BDS组合系统进行了数据处理与分析,不同年度监测结果表明,该模式用于桥梁短期动态变形高精度监测及结构长期趋势性变化分析是有效的,且能实现自动化处理。

关键词: 动态变形监测, 大跨径桥梁, GPS, BDS, 连续准静态处理

Abstract: The damage detection and safety monitoring of long-span bridges has become more complicated than normal bridges as their span lengths are getting even longer these years. The creep deformation of long-span bridges in operation is usually a process of slow change with relatively small amplitudes. Due to the limit of its inherent positioning capability, the GNSS-RTK technique does not completely meet the precision demand of long-span bridge deformation monitoring. Thus, this paper has explored the feasibility of the continuous pseudo-static monitoring mode based on GPS/BDS observations. An experiment on Sutong cable-stayed bridge was conducted to testify its effectivity with such processing modes as GPS only, BDS only and GPS/BDS combined. The results show that the proposed monitoring mode is highly applicable to precise monitoring of short-termdynamic deformation and analysis of their structure change trends of long-span bridges, which can also be operated automatically.

Key words: dynamic deformation monitoring, long-span bridges, GPS, BDS, continuous pseudo-static processing

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