| 利用全站仪进行大跨度网架沉降观测 |
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| 引用本文： | 王星雨.利用全站仪进行大跨度网架沉降观测[J].北京测绘,2012(3):28-31. |
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| 作者姓名： | 王星雨 |
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| 作者单位： | 北京京昌工程测绘技术有限公司,北京,102200 |
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| 摘 要： | 大跨度钢制网架结构广泛应用于大型封闭场馆屋顶的建设中,为了解网架在施工的不同阶段和在使用运营的过程中出现的沉降变形情况,分析其安全稳定性,并及时加以维护,需要进行必要的定期沉降变形观测,但大跨度网架的搭建都比较高,与地面联系的通道一般只有梯子,水准仪及水准尺无法在其上面安放,由于其空间的特殊性,很难进行精密水准测量,本文提出一种观测方法解决该问题,即利用测角精度2"以内的全站仪通过三角高程测量的方法对网架进行沉降观测,并在实际工程中验证了该方法的可行性和可靠性,同时对精度进行了分析和论证,可以满足相关变形测量规范和网架设计方的要求。在该工程中作者运用了两个自己在平时工作中研发的软件,给数据处理带来了便捷和准确,高程基准点的二等水准测量使用了"PLS软件"记录和严密平差,沉降变形数据使用了"BXZS软件"处理,计算单次和累计沉降量及沉降速率,并自动绘制"沉降量-时间"曲线图,直观地反映出沉降量与时间的关系,是分析沉降稳定性的重要依据。
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| 关 键 词： | 大跨度网架 沉降变形 三角高程 精度 自动化数据处理 |
Settlement Observation of Long Span Net Structure by Total Station |
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| WANG Xing-yu.Settlement Observation of Long Span Net Structure by Total Station[J].Beijing Surveying and Mapping,2012(3):28-31. |
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| Authors: | WANG Xing-yu |
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| Institution: | WANG Xing-yu (Beijing Jingchang Engineering Surveying Technique Ltd. ,Beijing 102200,China) |
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| Abstract: | Long span steel system net structure is extensively applied to the large close venues＇ root, to realize the settlement and deformation of the net structure at different periods of construction and the process of u- sing, analyze its safety stability, and maintain in time, it demands carrying on necessary and periodical setde- ment and deformation measurement, but the long span net structure is very high, in the channel there is usually only a ladder,level instrument and level ruler can＇t perform in it. Because of the special space of the net struc- ture, it＇s hard to carry on precise leveling. The paper puts forward a method o{ observation to solve this prob- lem, that is, using the trigonometric leveling o{ the total station that has 2＂ precision to carry on settlement and deformation measurement of the net structure, and the method is verified possibly and credibly in engineer- ing, it analyzes the precision, accord with survey standard and net structure designer requirements. In this pro- ject, the author uses the two softwares of himself to edit data and it is very convenient and accurate for leveling use ＂PLS＂ records and adjustment,the subsidence data processing use ＂BXZS＂ processing, calculation, automatic drawing the graph of ＂subsidence-time＂ ,intuitive to reflect the relationship between the subsidence and time, this is an important basis of analysis subsidence. |
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| Keywords: | long span net structure settlement and deformation observation trigonometric leveling precision automate data processing |
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