Application of geophysical exploration technologies for channel at sea
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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。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.
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Key words:
- offshore channel /
- multibeam sounding /
- sub-bottom profiling /
- offshore borehole /
- sediment
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