Penetration type multifunctional submarine sediment in-situ observation probe rod

Abstract

The invention relates to a penetration type multifunctional submarine sediment in-situ observation probe rod, including a static sounding probe, a resistivity measuring module, a deformation measuring tube and a control cabin which are connected in sequence from bottom to top. The resistivity measuring module includes a resistivity measuring module main body, and point electrodes are distributed at equal intervals on the outer circumferential surface of the resistivity measuring module main body. The deformation measuring tube is of a tubular structure, includes a deformation rubber tube and embedded pore water pressure sensors inside the deformation rubber tube, eight stress and strain measuring optical fibers are distributed at equal intervals along an axial direction on the outer wall of the deformation rubber tube, a row of water drainage holes are distributed along the axial direction, and each water drainage hole is connected with an embedded pore water pressure sensor. The penetration type multifunctional submarine sediment in-situ observation probe rod provided by the invention can realize CPTU detection and can also perform long-term in-situ observation, and add dynamic change process observation of pore water pressure and sediment deformation of different depths; and deformation observation and pore pressure observation are effectively combined, and taking static sounding data for reference, and a dynamic change process mechanism of seabed sediments are interpreted from different angles.

Description

technical field [0001] The invention relates to a penetrating multifunctional seabed sediment in-situ observation probe, which belongs to the technical field of marine observation and the field of marine engineering geology. Background technique [0002] In the coastal zone, sediments are rapidly settled and accumulated through long-distance transport by rivers, and a series of dynamic changes occur under the influence of ocean hydrodynamics (waves, currents, tides, etc.), soil weight, and bioturbation, including sediment Consolidation and compaction process, liquefaction rheological process, erosion and resuspension migration process, in these processes, the composition, structure, physical and mechanical properties and engineering geological properties of sediments undergo dynamic changes, which in turn lead to coastal erosion and port siltation. , submarine landslides, turbidity currents and other marine geological disasters, thus causing huge damage to offshore platforms...

AI Technical Summary

Problems solved by technology

[0011] Obviously, for complex and diverse seabed sediments, mastering any single index cannot effectively study its properties, changes, mechanisms, and processes

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