巴尔干半岛高海拔地区投影变形控制方法  

Control Method of Projection Deformation in High Altitude Area of Balkan Peninsula

作　　者：王勇 刘秋鸣 WANG Yong;LIU Qiu-ming(CCCC-SHEC Fourth Engineering Company Ltd.,Wuhu 241000,China)

机构地区：[1]中交二航局第四工程有限公司,芜湖市241000

出　　处：《公路》2024年第2期126-128,共3页Highway

摘　　要：线路控制测量中,当工程线路跨越狭长带状区域,海拔跨度较大时,长度变形是一个不可避免的问题。控制网是一个地区或者测区的统一坐标高程基准框架,是保证测量精度的重要因素,当测区长度变形大于1/2结构物容许误差时,必须对长度变形加以控制。结合黑山南北高速公路项目,介绍贝塞尔-1841椭球框架中巴尔干半岛地区长度变形的改正原理和控制方法:对线路分带分区,自定义高程和投影比例修正平距,将高斯投影长度变形和基准面高程不同引起的长度变形控制在允许范围之内,满足结构物的施工放样精度。In route control survey,if the route crosses the narrow strip area and the elevation span is large,the length projection deformation is an unavoidable problem.The control network is a unified coordinate elevation datum frame for a region or survey area,and it is an important factor to ensure the measurement accuracy.When the length deformation of the survey area is greater than 1/2 of the allowable error of the structure,the length deformation must be controlled.Combining with the Bar-Boljare Highway project in Montenegro,in the paper the correction principle and control method of the projection deformation in the Balkan Peninsula area in the Bessel-1841 ellipsoid framework are described:to divide the lines into zones,to define the elevation and the projection proportion to correct the horizontal distance,to control the projection deformation caused by the difference between the Gauss projection length deformation and the baseline elevation within the allowable range,so as to meet the construction lofting accuracy of the structure.

关 键 词：线路测量 巴尔干半岛 高海拔地区 投影变形 测量尺度 

分 类 号：U412.24[交通运输工程—道路与铁道工程]