Monitoring method for turbulent fluctuation structure of water flow at bottom of daub block during high-sand-containing flood bed scour by hyperconcentrated flow

Abstract

The invention relates to a river work model, whose IPC code is E02B 1 / 02, in particular to a monitoring method for a turbulent fluctuation structure of water flow at the bottom of a daub block during a high-sand-containing flood bed scour by hyperconcentrated flow scouring period. According to the simulated monitoring method, the daub block is prefabricated by an organic glass die box, flaky diaphragm type pressure sensors are distributed on the bottom of the daub block and are connected with a data acquisition instrument via data lines so as to collect a water flow pressure signal in real time. The simulated monitoring method disclosed by the invention has a simple structure, is convenient to operate and can be used for accurately monitoring turbulent fluctuation status of water flow at the bottom of the daub block so as to provide a fesible test method and device for deeply researching the problem of the bed scour by hyperconcentrated flow phenomenon of the Yellow River, and a foundation for recognizing the generation mechanism of the bed scour by hyperconcentrated flow phenomenon and building the scouring index of the bed scour by hyperconcentrated flow phenomenon is laid, and an important basis and an important reference are provided for the planning and the design of a Yellow River flood control plan and a flood control project.

Description

Technical field: [0001] The invention relates to a river engineering model, the IPC international patent classification number of which is E02B1 / 02, in particular to a method for simulating and monitoring the water flow turbulence structure at the bottom of a clay block during the scouring period of a high-sediment flood "exposing the river bottom". Background technique: [0002] In rivers with high sediment content, such as the Xiaobei main stream of the Yellow River and the Weihe River, under the action of high-sediment floods, the riverbed often undergoes severe concentrated erosion, and after a certain period of siltation and sedimentation in the early stage, the density is relatively large, The "clay layer" with high strength is sometimes lifted from the bed surface, rolled up like a "carpet", and exposed to the water in pieces, with an area of ​​several square meters or even more than ten square meters. rice, and then broken and collapsed in a short period of time, and...

AI Technical Summary

Problems solved by technology

[0005] The upward lifting force generated by the turbulent water flow at the bottom of the clay block is the main driving force for the "uncovering the river bottom". However, since we cannot monitor the actual situation of the turbulent water flow structure at the bottom of the clay block in natural rivers, we can only rely on experiments with water tanks or Model test to carry out basic theoretical research

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