沉管隧道基础施工多波束测深系统高精度 检测技术研究及应用.

In the engineering construction of immersed tube tunnel, the foundation bed bathymetry is an important part of the foundation construction, and high -precision foundation bed bathymetry is an important guarantee for the quality of the foundation engineering. Relying on the gravel leveling test project of the submarine tunnel foundation bed of Shenzhen Zhongshan Link project, the research and application of high-precision detection technology based on multi-beam bathymetry system was carried out. The underwater same position parameter conversion comparison method was used to realize the testing and verification of the accuracy of multi-beam bathymetry system by geodetic high precision instruments. The calibration and error mandatory correction of the data processing model of multi -beam system by setting the underwater elevation ratio measurement steel plate effectively improves the accuracy of foundation bed laying. By comparing the multi-beam sweep data with the results of penetration measurement, the results are basically consistent, which indicates that the multi -beam bathymetry system meets the project needs. The high-precision detection technology of multi-beam bathymetry system for immersed tunnel foundation construction can provide reliable reference data for underwater foundation construction. [ABSTRACT FROM AUTHOR]