Test method applied to jet flow scouring of hard clay

Abstract

A test method applied to hard clay jet flow scouring mainly comprises the following steps that clay slurry is loaded into a clay consolidation assembly, and the clay consolidation assembly is sealed; the negative pressure drainage assembly is started to dehydrate and consolidate clay slurry in the clay consolidation assembly; the dewatered and solidified clay is subjected to jet washing through a movable jet washing assembly; all the assemblies are disassembled, and the jet flow scouring test under one set of working conditions is completed. The method can greatly shorten the long-time consolidation drainage process of silt, carries out submerged jet flow on the remolded hard clay, can be used for researching the underwater scouring characteristics and the starting and diffusion rules of the hard clay, reveals the jet flow scouring mechanism of the hard clay, provides an evaluation method for the scouring capacity and the scouring efficiency, and has a good application prospect. 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 method 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...

AI Technical Summary

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

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