Device and method for multi-stage penetration submarine sand wave in-situ observation based on resistivity probe rod

Abstract

The invention provides a multi-stage penetration type submarine sand wave in-situ observation device and method based on a resistivity feeler lever. The device comprises a support structure, a multi-stage penetration mechanism, an annular electrode resistivity feeler lever, and a matched observation apparatus. The principle thereof is as follows: penetration of the feeler lever is performed depending on a multi-stage penetration system triggered by characteristics of different stages of sand wave migration, observation of a potential value of a penetration region is performed through the feeler lever, a resistivity sudden change cross section elevation is extracted, and the change of a sandy seabed surface elevation with time is analyzed. The method includes implementation of the multi-stage penetration system and resistivity inversion submarine sand wave elevation change. According to the device and method, a new observation thought is provided for in-situ real-time observation of submarine sand wave migration, a new method is provided for penetration of medium and small submarine sand wave development areas, the device is simple and easy to use, and the applicable water area of in-situ real-time measurement is wide.

Description

technical field [0001] The invention relates to a multi-stage penetration type seabed sand wave in-situ observation device and method based on a resistivity probe rod, belonging to the technical field of seabed observation and the field of marine engineering geology. Background technique [0002] Submarine sand wave is a type of intermittent submarine geomorphology in which the sandy sediments on the continental shelf are under the action of hydrodynamic forces such as ocean waves and tides. The ridge line is long and narrow perpendicular to the direction of the main current. A large number of facts show that the existence and migration of submarine sand waves have a great impact on the safety of submarine pipelines. The migration of sand waves can easily cause suspension or burial of submarine pipelines, and in more serious cases, it will lead to breakage and failure of submarine pipelines, which affects economic security and Environmental security poses a huge threat, so i...

AI Technical Summary

Problems solved by technology

This observation method is simple and easy to implement, but it requires repeated measurements and the time is not continuous, so in-situ observation cannot be realized, and the specific situation of sand wave migration cannot be accurately judged from intermittent data

Seabed sand wave in-situ real-time observation device and method (public number: CN107631720A) and seabed sand wave migration observation device and method based on pressure gauge (public number: CN107063196A), although the in-situ, long-term, Continuous observation data, but they are all inversion of sand wave height changes through water pressure changes, and the processing of complex water pressure changes on the seabed is very complicated, which will bring large errors

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