海上航道地球物理勘查技术的应用

doi:10.11720/wtyht.2023.0175

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Abstract

Prior to the construction of an offshore channel, it is necessary to acquire data on the water depth and seabed sediments within the channel, aiming to determine appropriate dredging equipment and processes. Based on the mutual verification of data from existing tidal stations, offshore boreholes, and different exploration technologies, this study determined accurate water depth, seabed topography, and the thicknesses and distributions of sediments in both soft and hard oil layers utilizing the multibeam sounding and sub-bottom profiling techniques. Accordingly, this study summarized the technical measures, as well as the inversion characteristics of soft and hard soil layers of sediments, for offshore channel exploration. The obtained results are beneficial for the economical and efficient offshore channel exploration in sea areas with large waves using the multibeam sounding and sub-bottom profiling techniques. Furthermore, these results can be promoted to the exploration of subsea sediments containing toxic substances.

Key words： offshore channel multibeam sounding sub-bottom profiling offshore borehole sediment

Received: 19 April 2023 Published: 23 January 2024

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	Articles by authors
	Pei-Xian TIAN
	Wei-Jian CHEN
	Qi-Hui LIN
	Wei-Bin ZHOU

Cite this article:

Pei-Xian TIAN,Wei-Jian CHEN,Qi-Hui LIN, et al. Application of geophysical exploration technologies for channel at sea[J]. Geophysical and Geochemical Exploration, 2023, 47(6): 1450-1455.

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https://www.wutanyuhuatan.com/EN/10.11720/wtyht.2023.0175 OR https://www.wutanyuhuatan.com/EN/Y2023/V47/I6/1450

New channel location map

Principle diagram of multi-beam sounding technology

Main components of multi beam sounding system

Main components of sub-bottom profiler detection system

Main working flow of multi beam sounding

Schematic Diagram of water level correction with multi beam sounding

Actual bathymetric chart of K30+000 to K31+100 Channel

Sub-bottom profiler K30+000 to K31+100 Channel

Sediment table of ZK101 drilling hole

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