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An automatic deployment system and method for long-term observation of deep seabed pore water pressure

A pore water pressure, automatic technology, used in surveying and navigation, open-air water source survey, measuring devices, etc., can solve the problems of amplifying the pore water environment, the acquisition results cannot represent the characteristics of the target, and it is meaningless.

Active Publication Date: 2016-01-13
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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  • An automatic deployment system and method for long-term observation of deep seabed pore water pressure
  • An automatic deployment system and method for long-term observation of deep seabed pore water pressure
  • An automatic deployment system and method for long-term observation of deep seabed pore water pressure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0088] On-site observation of the underwater delta of the Yellow River estuary, deployment of the submarine pore water pressure observation system. According to the use method and steps adopted in the present invention, the equipment is assembled and deployed in situ smoothly.

[0089] After 25 days of deployment, drive the boat to the observation point, put down the underwater acoustic / long wave communicator, first obtain the collected data during this period (including the collection time, pore pressure value, current depth, etc.), and then obtain the current operating status parameters of the equipment (including current depth, remaining power, etc.). Since the remaining power was greater than expected, the site decided to conduct another round of observations, recover the underwater acoustic / long wave communicator, and then return.

[0090] Return to the observation point after 45 days of deployment, put down the underwater acoustic / long wave communicator, first obtain th...

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PUM

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Abstract

The invention discloses a deep-sea floor pore water pressure long-term observation automatic laying system and a deep-sea floor pore water pressure long-term observation automatic laying method. The system comprises an automatic lifting pore pressure meter, a underwater acoustic / long wave communicator, a ship-borne controller and a laying apparatus; the automatic lifting pore pressure meter orderly comprises a lower drill, a balance weight, a master control cabin, a floating body material, an upper drill and a protective rest from bottom to top; the underwater acoustic / long wave communicator and the ship-borne controller are used for controlling the automatic lifting pore pressure meter. A laying bracket and the automatic lifting pore pressure are sent into the seabed surface through a hook while laying; the lower drill begins drilling hole to enter sediment, and the stops running after arriving a set depth; and then the hook is packed up through a cable to finish the laying. When the system is used for recycling, a releaser is started through the emission of a control signal, parts of the automatic lifting pore pressure meter except the lower drill and the balance weight thereof are separated so that the automatic lifting pore pressure meter is floated, and recycled. The repeated laying-recycling of a complex deep-sea instrument is avoided, the working efficiency is improved, the research cost is lowered, and the artificial disturbance on the field search environment in the laying-recycling process is avoided.

Description

technical field [0001] The invention relates to an automatic deployment system and method for long-term observation of deep seabed pore water pressure, 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 between particles or pores, and is divided into static pore pressure and excess static pore pressure. Pore ​​pressure plays a very important role in subsea soil especially in sandy seabed. At present, it is known that the change of seabed pore pressure will cause many liquefaction damage phenomena, such as the subsidence of silt seabed, pit, silt flow and excessive scour around the foundation of structures causing the sinking of oil pipe racks and so on. Using the pore pressure observation system for in-situ observation can theoretically obtain the most authentic and r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01C13/00
CPCG01C13/008
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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