深中通道沉管安装测量塔法浮态标定与坐底标定精度对比试验

成益品; 陈伟乐; 宋神友; 孙海丰; 锁旭宏

doi:10.3973/j.issn.2096-4498.2021.08.017

隧道建设 >

2021 , Vol. 41 >Issue 8: 1399

DOI: https://doi.org/10.3973/j.issn.2096-4498.2021.08.017

施工技术

深中通道沉管安装测量塔法浮态标定与坐底标定精度对比试验

成益品 ,
陈伟乐 ,
宋神友 ,
孙海丰 ,
锁旭宏

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(1. 中交一航局第二工程有限公司，山东青岛 266071； 2. 深中通道管理中心，广东中山 528400)

成益品（1983—），男，河南济源人，2008年毕业于武汉大学，测绘工程专业，本科，高级工程师，从事沉管隧道施工测量技术管理与研究工作。E-mail： 28825114@qq.com。

网络出版日期: 2021-09-06

基金资助

广东省重点领域研发计划项目（2019B111105002）

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Calibration Accuracy Comparison between Floating State of Measuring

Tower and Coordinate Bottom for ImmersedTube Installation  in ShenzhenZhongshan Link

CHENG Yipin ,
CHEN Weile ,
SONG Shenyou ,
SUN Haifeng ,
SUO Xuhong

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(1. No.2 Engineering Company Ltd.of CCCC First Harbor Engineering Company Ltd., Qingdao 266071, Shandong, China; 2. Shenzhen-Zhongshan Link Administration Center, Zhongshan 528400, Guangdong, China)

Online published: 2021-09-06

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摘要

受沉管漂浮影响，沉管浮态标定测量塔法标定的精度及稳定性很难得到有效保障和提升。为解决沉管深水安装测量塔法高精度对接定位的难题，提出沉管坐底标定测量塔法。在完成沉管浮态下测量塔标定后，通过预先在深坞内铺设碎石基床，使沉管稳定坐落在碎石基床上；然后把仪器架设在陆地控制点再次标定沉管顶部特征点与测量塔特征点，并进行坐标转换；最后，分别将2种标定方法获取的测量塔定位参数输入定位系统进行内符合精度比对。通过沉管安装贯通测量对2种方法定位结果进行精度验证，证明采用坐底标定方法获取的测量塔定位参数精度稳定可靠，且可以有效提升沉管安装对接精度。

关键词： 沉管; 测量塔; 坐底标定; 浮态标定; 特征点; 坐标转换; 精度比对

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成益品 , 陈伟乐 , 宋神友 , 孙海丰 , 锁旭宏 . 深中通道沉管安装测量塔法浮态标定与坐底标定精度对比试验[J]. 隧道建设, 2021 , 41(8) : 1399 . DOI: 10.3973/j.issn.2096-4498.2021.08.017

Abstract

To achieve highprecision docking and positioning of immersed tubes in deepwater, the measuringtower method for coordinatebottom calibration is proposed. The immersed tube is stably located on a gravel base bed to accurately calibrate the relative position between the measuring tower and the immersed tube by prelaying the gravel bed in a deep dock, thus improving the measuringtower positioning accuracy and realizing highprecision docking of the immersed tube. The accuracy and stability of the measuringtower floating calibration are difficult to be effectively guaranteed and improved owing to the influence of the floating of the immersed tube. Further, the immersed tube is located on the gravel base bed after the completion of the measuringtower calibration under the immersedtube floating condition. Additionally, the measuring instrument is installed at the land control point to calibrate the feature points at the top of the immersed tube and measuring tower and perform a coordinate transformation. Subsequently, the positioning parameters obtained using the two calibration methods are inputted into the positioning system and compared with each other. Finally, the accuracy of the positioning results obtained using the two methods is verified by measuring the immersedtube installation. It is proven that the positioning parameters obtained using the two methods are stable and reliable and can effectively improve the installation and docking accuracy of the immersed tubes.

Key words： immersed tube; measuring tower; coordinate-bottom calibration; floating calibration; feature points; coordinate transformation; accuracy comparison

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