Simulation device and multi-point real-time monitoring method for riverbed dynamic change under flood action

Abstract

The invention discloses a simulation device for river bed dynamic change under flood action. The simulation device comprises a river channel simulation groove; a dam body is arranged in the groove; anelectric gate is arranged on the dam body; river channel simulation groove on the upstream portion and the downstream portion of the dam body is divided into a water storage area and a flood simulation area; a sand layer is laid at the bottom of the flood simulation area; a plurality of high-frequency pressure sensors are mounted on the bottom wall, under the sand layer, of the river channel simulation groove; laser devices are arranged directly above all the high-frequency pressure sensors in a one-to-one mode; and an electric control device calculates the real-time thickness of the corresponding sand layer according to a real-time thickness calculation formula of the sand layer. The invention also discloses a multipoint real-time monitoring method adopting the simulation device for river bed dynamic change under flood action. Water and the sand layer are not interfered, the side wall of a water tank does not need to be transparent, multi-point measurement can be achieved, and the high-frequency pressure sensors are mounted on the bottom wall needing to be monitored points of the river channel simulation groove and the laser devices correspondingly, so that measurement results are accurate.

Description

technical field [0001] The invention relates to the technical field of water conservancy engineering, in particular to a simulation device and a multi-point real-time monitoring method for dynamic changes of a riverbed under flood action. Background technique [0002] Flood is a term in the field of water conservancy, which refers to the rapid increase in the volume of rivers and lakes or the rapid rise of water levels caused by factors such as heavy rain, rapid ice and snow melting, storm surges, and dam breaks. The flood velocity is fast and the water head difference at the front end is large, and the downstream river bed is scoured quickly and violently, which will cause various geological disasters. Therefore, it is necessary to carry out experimental research on the dynamic change law of the river bed under the action of flood. However, due to the turbulent and turbulent characteristics of the flood, the scour process of the river bed is extremely rapid and violent, an...

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Problems solved by technology

However, the side wall of the tank must be transparent, and only one-dimensional flow can be measured (that is, the terrain changes on one line are the same), and multi-point simultaneous measurement of three-dimensional flow cannot be realized.

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