文章摘要
廖振修,高旭光,曹品.精密三角高程在高铁水中墩沉降观测中的实验分析[J].安徽建筑大学学报,2021,29(1):21-25
精密三角高程在高铁水中墩沉降观测中的实验分析
Experimental Analysis of High Precision Trigonometric Leveling on High Speed Railway Water Pier SettlementObservation
  
DOI:
中文关键词: 精密三角高程  沉降观测  水中墩
英文关键词: high precision trigonometric leveling  settlement observation  water pier
基金项目:安徽省教育厅科学研究一般项目(KJ2018JD04)
作者单位
廖振修 安徽建筑大学  土木工程学院安徽  合肥  230601 
高旭光 安徽建筑大学  土木工程学院安徽  合肥  230601 
曹品 安徽建筑大学  土木工程学院安徽  合肥  230601 
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中文摘要:
      高铁桥梁墩台的沉降观测属于高精度高程测量,正常情况下采用二等水准测量方案施测。但对于落 入水中的大跨度桥梁墩台,由于跨距过大,无法采用二等水准测量方案,可以考虑采用精密三角高程测量方 案作为替代。文中对精密三角高程原理及计算方法进行了阐述,针对特定大跨桥梁水中墩的沉降观测设计了 测量方案,并进行了数据采集及分析实验。实验结果表明,采用改进的精密三角高程测量方法和改造后的强 制对中微棱镜作为观测标,在合适的观测时段进行外业测量,能够达到二等水准测量的精度水平。
英文摘要:
      Second-Class Leveling is usually adopted as a high precision leveling method in settlement observation of high-speed railway piers. But it doesn't work in the scene of long-span bridge's water piers because the span between piers is too long. As an alternative, high precise trigonometric leveling can be used. In this paper,the principle and calculation method of high precise trigonometric leveling is described. A settlement observation scheme is designed for a specific long-span bridge's water piers. The data acquisition and analysis experiments are carried out. The experimental result shows that the accuracy level of Second-Class Leveling can be achieved by using improved high precision trigonometric leveling in condition of using the reformed forced centering micro prism as observation target and carrying out field survey in appropriate observation period of time.
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