基于沉管隧道工程的高精度多波束测深技术

High precision multibeam sounding technology based on immersed tube tunnel project

在沉管隧道的施工过程中,碎石整平的质量控制是沉管顺利沉放的重要前提。以深中通道沉管隧道基础碎石整平为例,针对该工程提出的±4 cm高精度施工要求,结合工程现场实际对多波束测量方法进行一系列优化调整,提出一种深度直接标定法提升精度,并通过点状法、线状法等多重手段对多波束数据进行比对验证。结果表明,该多波束测深技术可满足工程的精度要求;可应用该套多波束测深技术进行现场的碎石整平、管节回填等多个环节的成果检测。

Quality control of gravel leveling is an important prerequisite for successful installation of the immersed tube tunnel during construction.Taking the immersed tube tunnel foundation gravel leveling project of the Shenzhen-Zhongshan Link as an example,aiming at the high-precision construction requirement of±4 cm proposed for this project,we put forward a series of optimization adjustments to the multibeam measurement method based on the construction site,propose a direct depth calibration method to improve precision,and compare and verify the multibeam data by multiple methods,such as point method and line method etc.The results show that this multibeam sounding technology can meet the engineering requirements.The application of the multibeam sounding technology can meet the result detection of multiple stages of construction,such as gravel leveling and backfilling of tube.