安九铁路九江长江特大桥测量控制网方案研究
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摘要
为了解决目前普遍存在的铁路特大桥原线路控制网精度等级比桥梁控制网所需要精度等级低的问题,采用"一点一方向"法建立桥梁施工独立坐标系,以达到提高控制网精度的目的。以安九铁路九江长江特大桥施工控制网的建设为例,研究高等级桥梁控制网的建网方案,并验证"一点一方向"法在提高控制网精度等级方面的可行性。在线路起算点二等平面控制网的基础上,采用"一点一方向"法建立一等平面控制网,并根据现场地形、地貌、桥型和跨度,从桥梁平面与高程控制网的选点布网、外业数据采集、数据处理、成果取舍、平差计算和桥梁施工独立坐标系建立等方面着手,建立可靠的高精度大桥施工控制基准。结果表明,最弱边边长相对中误差从原有的1/210 000提高至1/321 000。
In order to the problem existed in super large railway bridge survey that precision of the original route horizontal control network is lower than bridge construction control network,this paper adopts the one point one direction adjustment method to establish the independent coordinate system for improving the precision. Taking the construction control network of the Yangtze River Bridge on the newly built AnqingJiujiang Railway for example,the research on the scheme of establishing high-grade bridge construction control network is conducted,which also verifies the feasibility of the method. On the basis of the second-order initial data from starting point,considering topographic features,bridge type and bridge span,this study establishes the first-order plane control network as high precision datum,embarking on the selection of observation points for plane and vertical control network,field data collection, data processing, acceptance or rejection rule of results and adjustment calculation. The results show that the relative mean error of the weakest baseline's length increases to1/321 000 from 1/210 000.
In order to the problem existed in super large railway bridge survey that precision of the original route horizontal control network is lower than bridge construction control network,this paper adopts the one point one direction adjustment method to establish the independent coordinate system for improving the precision. Taking the construction control network of the Yangtze River Bridge on the newly built AnqingJiujiang Railway for example,the research on the scheme of establishing high-grade bridge construction control network is conducted,which also verifies the feasibility of the method. On the basis of the second-order initial data from starting point,considering topographic features,bridge type and bridge span,this study establishes the first-order plane control network as high precision datum,embarking on the selection of observation points for plane and vertical control network,field data collection, data processing, acceptance or rejection rule of results and adjustment calculation. The results show that the relative mean error of the weakest baseline's length increases to1/321 000 from 1/210 000.
引文
[1]李剑坤.长距离跨海大桥施工控制网测量[J].铁道勘察,2013(2):1-3
[2]吴迪军. GPS在现代桥梁工程测量中的应用综述[J].铁道勘察,2006,32(2):1-2.
[3]吴迪军. GPS桥梁施工控制网设计和施测方法研究[J].桥梁建设,2009(6):72-75.
[4]杨震.轨道交通测绘中精密控制网的应用[D].北京:北京建筑大学,2017.
[5]邱冬炜,杨松林,苏浩源.大跨径桥梁GPS平面控制网的布测[J].测绘科学,2004,29(5):56-58.
[6]中铁二院集团有限公司等. TB10601—2009高速铁路工程测量规范[S].北京:中国铁道出版社,2009.
[7]吴迪军,熊伟,张建军.桥梁施工平面控制网必要精度的研究[J].地理空间信息,2008(6):100-102
[8]吴迪军.桥梁工程测量技术现状及发展方向[J].测绘通报,2016(1):1-5.
[9]余祥亮.坦桑尼亚基甘博尼大桥设计[J].世界桥梁,2017,45(1):1-4.
[10]赖鸿斌,马德英,梅熙,等.山区二等三角高程测量方法的应用研究[J].铁道工程学报,2012(6):15-19.
[11]吴迪军.精密三角高程跨海水准测量的优化设计[J].铁道勘察,2015(6):1-3.
[12]张正禄,邓勇,罗长林,等.精密三角高程代替一等水准测量的研究[J].武汉大学学报(信息科学版),2006,31(1):5-8.
[13]杨荣南,代皓.普宣高速公路普立特大桥加劲梁施工关键技术[J].桥梁建设,2017,47(3):111-115.
[14]吴迪军.全站仪系统差对三角高程跨河高差的影响分析[J].铁道勘察,2014(5):1-5.
[15]吴迪军.单标三角高程法跨河水准测量设计与实验分析[J].地理空间信息,2012(4):132-133.
[2]吴迪军. GPS在现代桥梁工程测量中的应用综述[J].铁道勘察,2006,32(2):1-2.
[3]吴迪军. GPS桥梁施工控制网设计和施测方法研究[J].桥梁建设,2009(6):72-75.
[4]杨震.轨道交通测绘中精密控制网的应用[D].北京:北京建筑大学,2017.
[5]邱冬炜,杨松林,苏浩源.大跨径桥梁GPS平面控制网的布测[J].测绘科学,2004,29(5):56-58.
[6]中铁二院集团有限公司等. TB10601—2009高速铁路工程测量规范[S].北京:中国铁道出版社,2009.
[7]吴迪军,熊伟,张建军.桥梁施工平面控制网必要精度的研究[J].地理空间信息,2008(6):100-102
[8]吴迪军.桥梁工程测量技术现状及发展方向[J].测绘通报,2016(1):1-5.
[9]余祥亮.坦桑尼亚基甘博尼大桥设计[J].世界桥梁,2017,45(1):1-4.
[10]赖鸿斌,马德英,梅熙,等.山区二等三角高程测量方法的应用研究[J].铁道工程学报,2012(6):15-19.
[11]吴迪军.精密三角高程跨海水准测量的优化设计[J].铁道勘察,2015(6):1-3.
[12]张正禄,邓勇,罗长林,等.精密三角高程代替一等水准测量的研究[J].武汉大学学报(信息科学版),2006,31(1):5-8.
[13]杨荣南,代皓.普宣高速公路普立特大桥加劲梁施工关键技术[J].桥梁建设,2017,47(3):111-115.
[14]吴迪军.全站仪系统差对三角高程跨河高差的影响分析[J].铁道勘察,2014(5):1-5.
[15]吴迪军.单标三角高程法跨河水准测量设计与实验分析[J].地理空间信息,2012(4):132-133.