| GPS在桥梁跨河水准测量中的应用研究 |
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| 引用本文： | 熊伟,吴迪军,李剑坤.GPS在桥梁跨河水准测量中的应用研究[J].测绘科学,2012,37(2):100-102. |
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| 作者姓名： | 熊伟 吴迪军 李剑坤 |
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| 作者单位： | 中铁大桥勘测设计院有限公司,武汉,430050 |
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| 摘 要： | 传统的跨河水准测量方法以几何光学观测为基础,受距离和气候条件的影响显著,工作效率较低。GPS技术所具有的三维定位功能,以其快速、全天候测量的优点,为跨河高程测量提供了一条新的途径。本文针对桥梁工程特点,探讨了GPS跨河水准测量的基本原理和方法,采用线性拟合模型推求跨河点之间的高程异常差,再结合GPS大地高即可求得跨河高差。在安庆长江铁路大桥精密控制网测量中,进行了二等GPS跨河水准测量试验,采用测距三角高程法进行验证,较差为4.7mm。
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| 关 键 词： | 跨河水准测量 安庆长江铁路大桥 GPS高程 |
Application of GPS in bridge river-crossing leveling |
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| XIONG Wei
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WU Di-jun
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LI Jian-kun.Application of GPS in bridge river-crossing leveling[J].Science of Surveying and Mapping,2012,37(2):100-102. |
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| Authors: | XIONG Wei WU Di-jun LI Jian-kun |
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| Institution: | (China Railway Major Bridge Reconnaissance & Design Institute CO.LTD.,Wuhan 430050,China) |
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| Abstract: | The traditional method of river-crossing leveling based on geometric optical measurement which is influenced by the distance and weather conditions significantly and have lower efficiency.GPS technology provides a new approach of river-crossing leveling which has three-dimensional positioning function with the advantages of quickly and all-weather measurement.According to the features of bridge engineering,the basic principles and methods of river-crossing leveling was introduced firstly in the paper.The linear fitting model was applied to estimate the height anomaly difference between the river-crossing points,and then combining with the GPS geodetic height,the river-crossing height difference was obtained.Finally the second order GPS river-crossing leveling experiment was carried out in the high precision control network for Anqing railway bridge over Yangtze river,which was validated by trigonometric leveling,and the difference is 4.7mm. |
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| Keywords: | river-crossing leveling the Anqing railway bridge over Yangtze river GPS elevation |
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