| 大跨径斜拉桥主梁线形测控新方法研究及应用 |
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| 引用本文： | 顾玄龙,刘成龙,李雷,沈卢明,蒋涛,杨雪峰.大跨径斜拉桥主梁线形测控新方法研究及应用[J].测绘通报,2019,0(4):49-53,59. |
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| 作者姓名： | 顾玄龙 刘成龙 李雷 沈卢明 蒋涛 杨雪峰 |
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| 作者单位： | 西南交通大学地球科学与环境工程学院,四川 成都611756;西南交通大学高速铁路运营安全空间信息技术国家地方联合工程实验室,四川 成都611756;中铁第四勘察设计院集团有限公司,湖北 武汉,430063;四川公路桥梁建设集团有限公司,四川 成都,610041 |
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| 基金项目： | 长江学者和创新团队发展计划（PCSIRT） |
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| 摘 要： | 大跨径斜拉桥结构刚度小、变形大，为保证主梁顺利合龙，施工过程必须快速精确定位主梁上各个节段的平面和竖向线形。区别于传统的极坐标主梁平面线形测控方法，本文提出采用全站仪自由设站法测控主梁平面线形；同时区别于传统的水准测量方法，提出采用全站仪间接高差传递的方法测控主梁竖向线形。介绍了两种新方法的测量原理，通过工程实例论证了新方法的可行性和实用性，且能够大幅度提高测控效率，可为其他大跨径桥梁主梁线形的测控提供一定的参考。
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| 关 键 词： | 大跨径斜拉桥 主梁线形测控 全站仪 自由设站测量 间接高差 |
| 收稿时间： | 2018-07-24 |
Research and application of a new method for measuring main girder of a large span cable-stayed bridge |
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| GU Xuanlong,LIU Chenglong,LI Lei,SHEN Luming,JIANG Tao,YANG Xuefeng.Research and application of a new method for measuring main girder of a large span cable-stayed bridge[J].Bulletin of Surveying and Mapping,2019,0(4):49-53,59. |
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| Authors: | GU Xuanlong LIU Chenglong LI Lei SHEN Luming JIANG Tao YANG Xuefeng |
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| Institution: | 1. Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China;
2. State-Province Joint Engineering Laboratory in Spatial Information Technology for High-Speed Railway Safety, Chengdu 611756, China;
3. China Railway SiYuan Survey and Design Group Co., Ltd., Wuhan 430063, China;
4. Sichuan Road and Bridge Group Co., Ltd., Chengdu 610041, China |
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| Abstract: | Large span cable-stayed bridges have small structural stiffness and large deformation. In order to ensure the naturally closure of each segment on the main girders, the plane position and vertical alignment must be quickly and accurately located. Distinguished from the traditional method of polar coordinates measuring the girder plane, we propose a free station method used to measure the plane of girder. At the same time, different from the traditional level measurement, the method of measuring the girder vertical line using the total station indirect height difference is proposed. The paper first introduces the measurement principle of two new methods, and finally demonstrates the feasibility and practicability of the new method through a engineering example,which can greatly improve the measurement efficiency. It can provide a reference for the monitoring of other large span girders. |
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| Keywords: | large span cable-stayed bridge main girder alignment survey total station free station survey indirect height difference |
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