Abstract: A long-term in-situ observation device for the deep sea bottom supported engineering geological environment is provided, including: a sediment acoustic probe, a sediment pore water pressure probe, a three-dimensional resistivity probe, a water observation instrument, a long-term observation power supply system, a probe hydraulic penetration system, a general control and data storage transmission system, an acoustic releaser, an underwater acoustic communication apparatus, and an instrument platform. The observations include the engineering properties, physical properties, mechanical properties, and biochemical properties of a seawater-seabed interface-sediment. The engineering properties and the physical and mechanical indexes of seafloor sediments are comprehensively determined by three-dimensional measurement of seafloor resistivity and acoustic wave measurements. The physical and biochemical properties of seawater are expected to be acquired by sensors.

Abstract: The present invention discloses a second-generation in-situ test device for strength of a shallow water sediment, including a workboat and a static cone penetration test unit carried by the workboat, where the static cone penetration unit includes a mounting frame, a penetration unit, a control cabin and a hydraulic unit; the penetration unit and the hydraulic unit are both electrically connected to the control cabin. In this solution, the workboat is used to carry the test equipment, and the static cone penetration test unit is carried on the workboat with a special structure. Based on a double-cable lifting frame, the equipment is launched and recovered through a moon pool in the center of a hull. This significantly improves the efficiency and safety of the sediment strength test operation in a shallow water environment.

Abstract: A long-term in-situ observation device for the deep sea bottom supported engineering geological environment is provided, including: a sediment acoustic probe, a sediment pore water pressure probe, a three-dimensional resistivity probe, a water observation instrument, a long-term observation power supply system, a probe hydraulic penetration system, a general control and data storage transmission system, an acoustic releaser, an underwater acoustic communication apparatus, and an instrument platform. The observations include the engineering properties, physical properties, mechanical properties, and biochemical properties of a seawater-seabed interface-sediment. The engineering properties and the physical and mechanical indexes of seafloor sediments are comprehensively determined by three-dimensional measurement of seafloor resistivity and acoustic wave measurements. The physical and biochemical properties of seawater are expected to be acquired by sensors.

Abstract: The present invention discloses a system for measuring the mechanical properties of sea floor sediments at full ocean depth.

Abstract: The present invention discloses a system for measuring the mechanical properties of sea floor sediments at full ocean depth.

Abstract: The present invention discloses a second-generation in-situ test device for strength of a shallow water sediment, including a workboat and a static cone penetration test unit carried by the workboat, where the static cone penetration unit includes a mounting frame, a penetration unit, a control cabin and a hydraulic unit; the penetration unit and the hydraulic unit are both electrically connected to the control cabin. In this solution, the workboat is used to carry the test equipment, and the static cone penetration test unit is carried on the workboat with a special structure. Based on a double-cable lifting frame, the equipment is launched and recovered through a moon pool in the center of a hull. This significantly improves the efficiency and safety of the sediment strength test operation in a shallow water environment.

Abstract: An observation system and determination method for the re-suspension quantity of submarine sediments by deep-sea internal waves. The observation system comprises a submarine observation platform, a mooring rope, and an anchor mooring counterweight. Acoustic release transponder, a single-point current meter, a turbidity meter, a high-precision temperature and salinity detector, and a sediment catcher are mounted on the submarine observation platform. A main floating body and auxiliary floating bodies are arranged on the mooring rope, wherein the main floating body is located in the middle of the mooring rope and is equipped with acoustic Doppler current profilers, and the auxiliary floating bodies are equipped with turbidity meters and high-precision temperature and salinity detectors. The anchor mooring counterweight is a gravity anchor provided with a square clamping groove and a fixed ring.

Abstract: An observation system and determination method for the re-suspension quantity of submarine sediments by deep-sea internal waves. The observation system comprises a submarine observation platform, a mooring rope, and an anchor mooring counterweight. Acoustic release transponder, a single-point current meter, a turbidity meter, a high-precision temperature and salinity detector, and a sediment catcher are mounted on the submarine observation platform. A main floating body and auxiliary floating bodies are arranged on the mooring rope, wherein the main floating body is located in the middle of the mooring rope and is equipped with acoustic Doppler current profilers, and the auxiliary floating bodies are equipped with turbidity meters and high-precision temperature and salinity detectors. The anchor mooring counterweight is a gravity anchor provided with a square clamping groove and a fixed ring.