Deep-sea sediment soil mechanics in-situ tester capable of carrying submersible vehicle

Abstract

The invention discloses a deep-sea sediment soil mechanics in-situ tester capable of carrying a submersible vehicle. The tester comprises a shear strength testing mechanism and a penetration resistance testing mechanism, wherein the shear strength testing mechanism comprises a shear driving device, a shear rod, a cross plate, a high-pressure chamber, torque testers and a torque motor; the torque testers are arranged in the high-pressure chamber and are used for detecting the torque of the torque motor; one end of the shear rod is fixedly connected with the cross plate, and the other end of the shear rod stretches into the high-pressure chamber and is connected with the torque motor; the shear driving device is used for driving the shear rod to move up and down; the torque motor is used for driving the shear rod and the cross plate to rotate; the penetration resistance testing mechanism comprises a penetration driving device, a penetration rod and a displacement sensor; the penetration rod and the displacement sensor are arranged on the penetration driving device; the penetration rod is connected with the displacement sensor; and the penetration driving device is used for driving the penetration rod to move up and down. The in-situ tester disclosed by the invention has the advantages that the submersible vehicle is convenient to carry, the measuring operation time is reduced, the working efficiency is high and the like.

Description

technical field [0001] The invention relates to a device for testing the mechanical properties of seabed sediments, in particular to a deep-sea sediment geomechanics in-situ tester capable of carrying submersibles. Background technique [0002] In deep sea engineering, the shear resistance and pressure bearing characteristics of seabed sediments are the necessary basis for the design, construction and operation of seabed operation equipment. Therefore, it is necessary to obtain the geomechanical parameters of seabed sediments accurately and efficiently. [0003] At present, the test for the mechanical properties of seabed sediments generally takes deep-sea samples and then completes the test in the laboratory. However, seabed sediments have the characteristics of low bearing capacity, large compression deformation, high sensitivity, and easy to be disturbed by the environment. During the sampling process, they are easily disturbed to change their natural structure; at the s...

AI Technical Summary

Problems solved by technology

Although the principle of hydraulic pressure transmission is used, pistons with different cross-sectional areas are used to amplify the pressure and improve the accuracy, but the measurement accuracy of the existing measuring devices is still very limited, and it is difficult to accurately measure the geomechanical parameters of seabed sediments

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