Seabed sand wave sediment sampling device and method

Abstract

The invention relates to the field of seabed sediment sampling, and particularly relates to a seabed sand wave sediment sampling device and method. The device comprises an extracting part and a sampling part, wherein the sampling part is movably connected with the extracting part; the extracting part comprises a plurality of steel pipe connecting rods which are arranged in parallel in the verticaldirection and a plurality of annular sand storage bins which are arranged in the axial direction of the steel pipe connecting rods; the annular sand storage bins are arranged between every two of theplurality of steel pipe connecting rods, an annular cavity is formed in the annular sand storage bin, the annular side wall of the annular sand storage bin is fixedly connected with the plurality ofsteel pipe connecting rods outside the annular sand storage bin, the top of the annular sand storage bin is open, and an annular hole is formed in the bottom of the annular sand storage bin. Effectivecollection of seabed sand wave soil samples is achieved, the structure is simple, recycling can be achieved for multiple times, and the use cost is reduced.

Description

technical field [0001] The invention relates to the field of seabed sediment sampling, in particular to a seabed sand wave sediment sampling device and method. Background technique [0002] Submarine sand wave is a mound-shaped and crescent-shaped submarine landform developed under the action of ocean waves, tides, currents and other hydrodynamic forces, and its ridge line is perpendicular to the direction of the main current. As an active landform, the migration of seabed sand waves will cause accidents such as suspension and breakage of submarine pipelines, silting of channels, and structural instability of oil and gas platforms, which pose a serious threat to the safety of engineering facilities in the ocean. Therefore, the observation of seabed sand waves Research is of great significance. [0003] In the field of marine geological exploration, on-site sediment sampling is the basic work of sediment analysis. The existing sediment samplers mainly include gravity type an...

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Problems solved by technology

[0003] In the field of marine geological exploration, on-site sediment sampling is the basic work of sediment analysis. The existing sediment samplers mainly include gravity type and excavation type, etc., each sampling volume is large, and it is suitable for soft soils that can provide large sampling depths. Soil, less ideal for sampling sandy sediments

Due to the high penetration intensity of the sandy seabed, it is difficult for the sampling column used in the existing gravity sampling to penetrate into the sandy sediment, so it is difficult to complete the sampling work; while the box sampler and the clam sampler cannot collect the seabed Internal samples and when taking seabed surface samples, due to the effect of sand and gravel, it is difficult to completely close, and sand leakage often occurs

Therefore, there is currently no sampling device that can effectively obtain the profile information of the sediment inside the sandy seabed.

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