A cableless long-term observation device for deep seabed pore water pressure with automatic lifting

A pore water pressure and observation device technology, which is applied in measurement devices, fluid pressure measurement, instruments, etc., can solve the problems of amplifying the pore water environment, the acquisition results cannot represent the characteristics of the target, and is meaningless, so as to avoid human disturbance and avoid The effect of repeated deployment and recycling to improve work efficiency

Active Publication Date: 2016-03-30
OCEAN UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional methods amplify the pore water environment, and even change it into an open environment, making the acquisition results unable to represent the target characteristics, or even meaningless
At present, there is no generally accepted method in the industry to solve this problem.

Method used

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  • A cableless long-term observation device for deep seabed pore water pressure with automatic lifting
  • A cableless long-term observation device for deep seabed pore water pressure with automatic lifting
  • A cableless long-term observation device for deep seabed pore water pressure with automatic lifting

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0076] On-site observation of the underwater delta in the Yellow River Estuary, deployment of a submarine pore water pressure observation system. According to the use method and steps adopted by the present invention, the equipment is assembled and deployed in situ smoothly.

[0077] Drive the ship to the observation point 25 days after deployment, put down the hydroacoustic / long wave communicator, first obtain the collected data (including collection time, pore pressure value, current depth, etc.) during this period, and then obtain the current operating state parameters of the equipment (Including current depth, remaining power, etc.). As the remaining power is greater than expected, the site decided to conduct another round of observations, recover the hydroacoustic / long wave communicator, and then return home.

[0078] After 45 days of deployment, return to the observation point, put down the hydroacoustic / long wave communicator, first obtain the collected data (including coll...

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PUM

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Abstract

An auto-lift cable-free long-term observation apparatus for deep-sea bed pore-water pressure comprises a lower bit, a counterweight, a master control cabin, float material, an upper bit and a protective frame. An auto-lift pore pressure meter is controlled through a hydroacoustic / long-wave communicator and a marine controller. During deployment, a deploying support and the auto-lift pore pressure meter are sent to the surface of the sea bed through a hook; the lower bit starts drilling into sediment until a set depth; the hook is retracted through a cable, and deployment is complete. During recycling, a control signal is transmitted to start a releaser, the auto-lift pore pressure meter is separated except the lower bit and the counterweight, and the auto-lift pore pressure meter is enabled to float up and recycled. The apparatus has the advantages that repeatedly deploying and recycling the complex deep-sea instruments is avoided, work efficiency is improved, scientific research cost is lowered, and artificial disturbance to the field research environment caused in the recycling and re-deploying process is avoided.

Description

Technical field [0001] The invention relates to a cable-free long-term observation device for deep seabed pore water pressure with automatic lifting, belonging to the technical field of marine observation and the field of marine engineering geology. Background technique [0002] Pore ​​water pressure (hereinafter referred to as pore pressure) refers to the pressure of groundwater in soil or rock, which acts on particles or pores. It is divided into static pore pressure and excess pore pressure. Pore ​​pressure plays a very important role in the seabed soil, especially in the sandy seabed. At present, it is known that the change of seabed pore pressure will cause many liquefaction damage phenomena, such as the collapse of the silt seabed, pits, silt flow and excessive erosion around the foundation of the structure causing the oil pipe frame to sink and so on. Using the pore pressure observation system for in-situ observation can theoretically obtain the most true and reliable dat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L11/00
Inventor 贾永刚郭磊刘晓磊张少同王振豪单红仙
Owner OCEAN UNIV OF CHINA
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