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

An observation system, a technology of soft clay, applied in the directions of measurement devices, instruments, underwater operation equipment, etc., can solve the problems of observation and research with little internal wave shear stress and deformation and sliding effects.

Active Publication Date: 2022-05-13
OCEAN UNIV OF CHINA
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  • 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 deep-sea internal wave-induced deformation and sliding of seabed soft clay
  • Long-term observation system and method for deep-sea internal wave-induced deformation and sliding of seabed soft clay
  • Long-term observation system and method for deep-sea internal wave-induced deformation and sliding of seabed soft clay

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Embodiment 1

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

[0102] Among them, the core deformation measurement unit is the seabed deformation sliding monitoring part, and its main components include micro-drill bit 19 , screw male head 20 , deformation measurement cable 21 , and auxiliary penetration probe rod 18 . The micro-drill 19 is at the bottom end, the upper part is fixedly connected to the lower part of the screw male head 20, the middle position of the top of the screw male head 20 is fixedly connected to the lower part of the deformation measurement cable 21, and the outer diameter of the screw male head 20 is connected to the auxiliary penetrating probe rod 18 The inner diameters of the female heads of the bottom screws are equal in size an...

Embodiment 2

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

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

[0129] a. Overall assembly of the observation system. The retention 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, pre-experiment, actual situation, etc.), and set the working parameters of each instrument;

[0131] c. System deployment. Use the scientific research ship and satellite positioning system to transport the observation system to the target point, use the lifting device and laying cable equipped on the ship, and control the system to sink into the seawater at a uniform speed. Under the joint action o...

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Abstract

The invention belongs to the technical field of deep-sea ocean observation, and relates to a long-term observation system and method for deep-sea internal wave-induced deformation and sliding of seabed soft clay. Includes deck control unit, measurement unit, retention unit and recovery unit. The invention provides an in-situ comprehensive observation system and observation method for acquiring internal wave and seabed deformation and sliding data and predicting the critical state of seabed instability. Realize the observation and study of the influence of internal waves on the shear stress and deformation sliding of the seabed, combine the observation of internal waves in the ocean with the deformation and sliding of the seabed, and solve the scientific problem of deep sea internal waves on the deformation and sliding of soft clay on the seabed. The automatic deployment and automatic recovery of the entire device is realized by setting acoustic releasers, penetrating motors, glass floats and other components. Set recovery unit, retention unit, etc. to meet various observation modes and needs.

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 deep-sea internal wave-induced deformation and sliding of seabed soft clay. 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 issue of the influence of internal waves on the stability of seabed 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 field data by traditional observation techniques, the level of understanding of the role of ocean hydrodynamics on seabed sediments is severely restricted. [0003] Ocean internal wave is an important seawater fluctuation, which can induce strong vertical flow and cause disturbance to the seabed at a water depth of 1500m. Its ...

Claims

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Application Information

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Patent Type & Authority Patents(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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