摘要
沉管隧道贯通测量精度要求极高,为确保贯通测量方法的可靠性,隧道贯通之前,在管节沉放后,利用测量塔顶端的GPS接收机进行快速静态观测,确定测量塔顶端坐标;利用激光投点仪将测量塔顶端坐标穿过人孔井传递到管节内部连接点上,确定连接点坐标;使用全站仪管内贯通测量方法,测出连接点坐标;对比两种方法得到的连接点坐标,验证贯通测量方法的可靠性。
The accuracy of penetration survey of immersed tunnel is very high.In order to ensure the reliability of the penetration survey method,the GPS receiver at the top of the survey tower is used to make fast static observation before tunnel penetration and after the pipe section is sunk,and the coordinates of the top of the measuring tower are determined.The coordinates of the top of the measuring tower are transmitted through manhole to the connection point in the pipe section by optical projector,and the connection point coordinates are determined by using the penetration survey method in the tube of the total station.The coordinates of the connection points obtained by the two methods are compared to verify the reliability of the penetration survey method.
作者
成益品
CHENG Yi-pin(No.2 Engineering Co.,Ltd.of CCCC First Harbor Engineering Co.,Ltd.,Qingdao,Shandong 266071,China)
出处
《中国港湾建设》
2022年第3期67-70,共4页
China Harbour Engineering
基金
广东省重点领域研发计划项目(2019B111105002)。
关键词
沉管隧道
测量塔
投点
贯通测量
immersed tube tunnel
measuring tower
projected point
penetration survey
