A test device for geomechanical parameters of deep-sea rare and soft substrates with different grounding ratios

Abstract

The present disclosure provides a device for testing geomechanical parameters of deep-sea rare and soft substrates with different grounding ratios, and relates to the technical field of deep-sea engineering and equipment. The installation can be completed quickly on the ship, and the soil samples on the ship can be tested for the indentation process, as well as the shear strength test under different indentation states (achieved by different grounding specific pressures), so as to realize the disassembly of the test device; The sliding connection between the side plate and the guide rod and the first chute enables the device to test the soil of any block in the box sampler; by changing the setting of the weight plate in the weight seat, it can simulate different Ground pressure. The device can timely test the shear strength and the subsidence process of the soil samples collected from the seabed by the deep-sea scientific research vessel, simulate the interaction between the grounding mechanism and the substrate during the driving process of the submarine operation vehicle, and ensure the accuracy of the test results. .

Description

technical field [0001] The present disclosure relates to the technical field of deep-sea engineering and equipment, and in particular, to a device for testing geomechanical parameters under different grounding specific pressures of deep-sea thin and soft substrates. Background technique [0002] Seabed cable laying, seabed mining, etc. may all involve working on seabed sediments. In the process of interacting with the sediment, these operating equipment inevitably involve the problems of depression and traction on the sediment. The deep-sea sediments used by the grounding mechanisms such as the tracks and skids of the deep-sea polymetallic collectors are thin and soft substrates, and the shear strength of the surface layer is very low. The variation law of shear strength. In view of the difficulty of measuring the mechanical parameters of deep-sea sediments, some scholars use the shear plate simulation experiment of the crawler vehicle. Although the motion posture of the c...

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Problems solved by technology

In view of the difficulty in measuring the mechanical parameters of deep-sea sediments, some scholars have used the shear plate simulation experiment of crawler vehicles. Although the movement attitude of crawler vehicles and the test of mechanical properties of sediments can be well simulated, the device is large in size and cumbersome to install. It is only suitable for the shear test of simulated soil indoors, and cannot test the shear strength of soil samples from deep-sea scientific research ships; and the evaporation of water and the disturbance of soil samples cannot be avoided after long-distance transportation of soil samples, which seriously affects the accuracy of the test sex

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