Testing device applied to jet flow scouring of hard clay

Abstract

A test device applied to hard clay jet flow scouring comprises a clay consolidation assembly, a negative pressure pumping drainage assembly and a jet flow scouring assembly, the bottom of the clay consolidation assembly is connected with an inlet of the negative pressure pumping drainage assembly, and the jet flow scouring assembly comprises a jet flow nozzle. The jet flow nozzle is located above the clay consolidation assembly and sprays water towards clay contained in the clay consolidation assembly. According to the invention, simulation of the whole process from preparation of the hard clay to jet scouring of the hard clay is realized. The preparation device of the high-hardness clay can greatly shorten the long-time consolidation and drainage process of silt, carries out submerged jet flow on the remolded hard clay, and can be used for researching the underwater scouring characteristics and starting and diffusion rules of the hard clay, revealing the jet flow scouring mechanism of the hard clay and providing an evaluation method for the scouring capacity and the scouring efficiency. And the dredging construction operation can be more scientifically and normatively carried out, and great help is also provided for the optimal design of the jet type flushing equipment.

Description

technical field [0001] The invention belongs to the technical field of hydraulic model tests, and in particular relates to a test device applied to jet erosion of hard clay. Background technique [0002] In the existing reservoir projects, sedimentation is a very prominent problem in recent years, especially for reservoir projects on sandy rivers, the situation of sedimentation is more serious. Sedimentation not only causes many reservoirs to be downgraded or silted up and scrapped, but even for reservoirs that have not reached the level of downgrade or scrapped, the effective storage capacity is also significantly reduced, which directly affects the benefits of water storage and benefits, and also makes many reservoirs flood control. Decreasing year by year, it is very easy to cause dam failure. Sediment deposition can also easily block the bottom hole of the reservoir flood discharge or the inlet of the water conveyance tunnel, causing dangerous situations. In order to e...

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Problems solved by technology

[0003] Jet scour technology has gradually become the most commonly used sediment start-up technology in the construction of underwater dredging of reservoirs and submarine cable pipeline burial. However, jet scour construction in clay, especially hard cohesive soil at the bottom of deep water reservoirs, is more difficult.

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