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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摘要

扩(新)建海上航道前需要获得航道水深、底质资料,以便确定疏浚设备和工艺等。基于已有验潮站、海上钻孔和不同勘查技术数据的相互检核,用多波束测深技术、浅地层剖面探测技术分别获得了航道精确的水深、海底地形和软土层、硬土层底质的厚度和展布。在此基础上,总结出海上航道勘查的关键技术处理措施以及底质软土层和硬土层的反演特征。上述应用结果有益于多波束测深技术、浅地层剖面探测技术在涌浪较大的海上开展经济、高效的航道勘查,而且能延拓到含有毒物质的水下沉积物勘查。

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	田培先
	陈伟坚
	林启辉
	周伟斌

关键词 ：航道, 多波束测深, 浅地层剖面探测, 海上钻孔, 底质

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

收稿日期: 2023-04-19 修回日期: 2023-08-30 出版日期: 2023-12-20

:	P631
	U616

作者简介: 田培先(1978-),男,高级工程师,长期从事岩土工程、工程物探等工作。Email:417509023@qq.com

引用本文:

田培先, 陈伟坚, 林启辉, 周伟斌. 海上航道地球物理勘查技术的应用[J]. 物探与化探, 2023, 47(6): 1450-1455.
TIAN Pei-Xian, CHEN Wei-Jian, LIN Qi-Hui, ZHOU Wei-Bin. Application of geophysical exploration technologies for channel at sea. Geophysical and Geochemical Exploration, 2023, 47(6): 1450-1455.

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https://www.wutanyuhuatan.com/CN/10.11720/wtyht.2023.0175 或 https://www.wutanyuhuatan.com/CN/Y2023/V47/I6/1450

Fig.1 新航道位置

Fig.2 多波束测深技术原理示意

Table 1 多波束测深系统主要部件

Table 2 浅地层剖面探测系统主要部件

Fig.3 多波束测深主要工作流程

Fig.4 多波束测深水位校正原理示意

Fig.5 K30+000至K31+100航道段实测水深等值线平面

Fig.6 K30+000至K31+100航道段浅地层剖面

Table 3 ZK101钻孔底质地层

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