Seabed sand wave sediment sampling device and method

Abstract

The invention relates to the field of seabed sediment sampling, in particular to a seabed sand wave sediment sampling device and method. It includes an extraction part and a sampling part, the sampling part and the extraction part are flexibly connected, the extraction part includes several steel pipe connecting rods arranged in parallel in the vertical direction and several annular sand storage bins arranged along the axial direction of the steel pipe connecting rods, the ring The sand storage bin is set between several steel pipe connecting rods. There is an annular cavity inside the annular sand storage bin. The annular side wall of the annular sand storage bin is fixedly connected with several steel pipe connecting rods outside. The top of the annular sand storage bin It is in the shape of an opening, and the bottom of the annular sand storage bin is provided with an annular hole. The effective collection of seabed sand wave soil samples is realized, the structure is simple, and it can be recycled and used for many times, thereby reducing the use cost.

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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