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Long-term observation system and method for deformation and sliding of seabed soft clay induced by deep sea internal waves

An observation system and soft clay technology, applied in the direction of measuring devices, instruments, underwater operation equipment, etc., can solve the problems of observation and research on the influence of internal wave shear stress and deformation sliding

Active Publication Date: 2021-09-24
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention is aimed at the traditional current research on internal waves, which is mainly aimed at the research on the influence of water body flow velocity, temperature, salinity and turbidity, etc., and there are few problems in the observation and research of the influence of internal waves on the shear stress and deformation sliding of the seabed surface. A new type of long-term observation system and method for deep-sea internal wave-induced deformation and sliding of soft clay on the seabed

Method used

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  • Long-term observation system and method for deformation and sliding of seabed soft clay induced by deep sea internal waves
  • Long-term observation system and method for deformation and sliding of seabed soft clay induced by deep sea internal waves
  • Long-term observation system and method for deformation and sliding of seabed soft clay induced by deep sea internal waves

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Embodiment 1

[0101] The long-term observation device for the deformation and sliding of seabed soft clay induced by deep-sea internal waves provided in this embodiment includes four parts: a deck control unit, a deformation measurement unit, an indwelling unit and a recovery unit. like Figure 1-6 shown.

[0102] Among them, the core deformation measurement unit is the seabed deformation and sliding monitoring part. The micro-drill 19 is at the bottom end, the upper part is fixedly connected with the lower part of the screw male head 20, the middle position of the top of the screw male head 20 is fixedly connected with the lower part of the deformation measuring cable 21, and the outer diameter of the screw male head 20 is connected with the auxiliary penetration probe rod. 18 The inner diameter of the female head of the bottom screw is equal in size and fits exactly. The auxiliary penetration probe 18 is a hollow structure, and the lower part is provided with a female screw port, the le...

Embodiment 2

[0127] Embodiment 2 This embodiment provides the steps of a long-term observation method for deformation and sliding of seabed soft clay induced by deep-sea internal waves.

[0128] like Figure 7-9 As shown, the steps for system deployment and observation using the system described in Embodiment 1 are as follows:

[0129] a. The overall assembly of the observation system. The indwelling unit is assembled first, and then the recovery unit is assembled;

[0130] b. Equipment calibration. Calibrate each equipment on the observation system (comprehensively adjust according to experience or pre-experiment, actual situation, etc.), and set the working parameters of each instrument;

[0131] c. System deployment. The observation system is transported to the target point by the scientific research ship and the satellite positioning system, and the lifting device and laying cable equipped on the ship are used to control the system to sink into the seawater at a uniform speed. Unde...

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Abstract

The invention belongs to the technical field of deep sea observation and relates to a long-term observation system and method for deformation and sliding of seabed soft clay induced by deep sea internal waves. The system comprises a deck control unit, a measuring unit, an indwelling unit and a recycling unit. The invention provides an in-situ comprehensive observation system and observation method for acquiring internal wave and seabed deformation sliding data and predicting a seabed instability critical state, which not only can realize the research on the influence of water flow velocity, temperature, salinity, turbidity and the like, but also can realize observation research on the influence of internal waves on seabed surface shear stress and deformation sliding; ocean internal wave observation and seabed deformation sliding are combined, and a scientific problem of deformation sliding of seabed soft clay caused by deep sea internal waves is solved. By arranging an acoustic releaser, an injection motor, a glass floating ball and other components, automatic laying and automatic recovery of the whole device are achieved; and a recycling unit, an indwelling unit and the like are arranged so that various different observation modes and requirements are met.

Description

technical field [0001] The invention belongs to the technical field of deep-sea observation, and relates to a long-term observation system and method for deformation and sliding of seabed soft clay induced by deep-sea internal waves. Background technique [0002] In recent years, with the increasing number of engineering activities such as the development of deep water resources and the laying of pipelines and cables, the impact of internal waves on the stability of submarine sediments has become a research hotspot in the field of marine science and engineering. Due to the difficulty of interdisciplinary research and the limited acquisition of on-site data by traditional observation techniques, the cognition level of ocean hydrodynamics on seafloor sediments is seriously restricted. [0003] Internal ocean waves are an important seawater fluctuation, which can induce extremely strong vertical flow, and can cause disturbance to the seabed at a depth of 1500m. The wavelength r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D21/02B63C11/52
CPCG01D21/02B63C11/52
Inventor 贾永刚宋晓帅李相乾范智涵季春生
Owner OCEAN UNIV OF CHINA
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