A device and method for in-situ detection of sediment strength in shallow sea

Abstract

The invention discloses an original-space detector and a detection method for beach shallow sea sediment strength. The original-space detector for the beach shallow sea sediment strength comprises a control ship and a frame device, wherein the control ship is provided with an air charging device and a vacuum generator and the frame device is provided with an injection device and a hydraulic device. An air pressure chamber on the frame device is connected with the air charging device and the vacuum generator. The air pressure chamber is a cylindrical leather bag with cross section being circular and vertically arranged. A protection cylinder is further arranged outside the leather bag. Water discharge holes are formed in the surface of the protection cylinder. The water discharge holes are in an oval shape, a V shape or a U shape. The method comprises the steps that the frame device is pulled to a target point through a ship and sinks to the seabed through self weight, strength of sediment under the seabed is detected through a hydraulic injection manner, contacting probe strength testing parameters are obtained, test points stratums are divided according to strength values of various layers of soil, names are chosen for the stratums, and bearing force and modulus on beach shallow sea foundation sole are confirmed. According to the original-space detector and the detection method for the beach shallow sea sediment strength, the defect that a large-scale research vessel can not be driven to a beach shallow sea range to conduct original-space strength detection for the seabed sediment is overcome, geological exploration can be repeatedly conducted in different seabed areas, cost is greatly reduced, and efficiency is improved.

Description

Technical field [0001] The invention belongs to the field of marine geological survey, and in particular relates to an in-situ detection device and method for the strength of beach and shallow sea sediments. Background technique [0002] Shoal areas mainly refer to beaches, intertidal zones and shallow seas, with water depths ranging from 0 to 10 meters. They have important scientific research and economic value and have become important positions for China's petroleum exploration and development. In-situ testing of the strength of beach and shallow sea sediments can greatly reduce the number of boreholes in marine engineering surveys, improve the quality and accuracy of engineering surveys, and have obvious economic benefits, which greatly shortens the survey cycle of marine engineering geological evaluation. As the development of marine oil and gas resources continues, in-situ sediment strength testing technology will be widely used in engineering geological surveys in beach-sh...

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Problems solved by technology

Therefore, in terms of in-situ testing technology for the strength of shallow sea sediments, my country still does not have the technology and equipment with its own independent intellectual property rights. Bottleneck technical problems in engineering construction such as coastal infrastructure

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