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为了研究大坡度桥梁特别是大坡度中小桥梁挠度观测难的问题,对各种监测方法从测量精度、测量速度和测量范围等方面进行深入的分析与比较,指出各种方法的应用范围和特点。通过应用静力水准仪测试黑龙江牡丹江三股线大桥挠度,分析了静力水准仪的两种安装方法在测量过程中产生测量误差的原因,并进行误差精度分析。数据分析表明在中小桥梁挠度监测中,连通管液位式挠度测量法是目前常用方法中最适合的监测方法;而在高坡度中小桥梁中外接支架测量法比转接点测量法不仅降低成本,处理数据方便,而且精确度很高,可以在今后的检测工作中大规模推广使用。
In order to study the difficulty of the deflection observation of large and medium slope bridges, especially for small and medium-sized bridges with large slopes, various monitoring methods are analyzed and compared from the aspects of measurement precision, measurement speed and measurement range. The application range and characteristics of each method are pointed out. Through the application of static level gauge to test the deflection of Mudanjiang Three-strand Bridge in Heilongjiang Province, the reasons for the measurement errors caused by the two installation methods of static level were analyzed and the error precision analysis was carried out. The data analysis shows that in the small and medium bridge deflection monitoring, the liquid pipe deflection measurement method is the most suitable monitoring method in the commonly used methods. In the middle and small bridge with high gradient, the measuring method of the connecting bracket not only reduces the cost, Convenient data processing, but also high accuracy, in the future detection work in large-scale promotion.