Coastal engineering silt physical model test bottom bed dynamic and comprehensive observation method

Abstract

The invention provides a coastal engineering silt physical model test bottom bed dynamic and comprehensive observation method. The method is characterized in that the method is involved in a total station, high-speed cameras, a mini-type soil pressure sensor and pore water pressure sensors, wherein the total station and the high-speed cameras are arranged on the outer side of a silt physical model test water tank and the mini-type soil pressure sensor and the pore water pressure sensors are arranged in a bottom bed in the silt physical model test water tank; the observation method includes a high-speed photographing method, a double-sensor synchronous point detection method and a total station section measurement method, the high-speed photographing method is used for photographing the bottom bed dynamic evolution and the wave time interval change from the glass side wall of the silt physical model test water tank, the double-sensor synchronous point detection method is used for separating dynamic pressure generated from waves through the pore water pressure sensors so as to acquire the actual change of the elevation of the bottom bed, the total station section measurement method includes the steps that after waves are generated and water is drained out slowly, the section is scanned in a scattered mode through the total station, so that final terrain is acquired and corrected. The method is suitable for being used in a water tank test and the dynamic evolution of the whole physical model test bottom bed is synchronously observed in real time.

Description

technical field [0001] The invention relates to a physical model test in the field of port and coastal engineering, in particular to an observation method for dynamic adjustment of a bottom bed profile under the action of waves in a two-dimensional tank, in particular to a dynamic comprehensive observation method for a bottom bed in a coastal engineering sediment physical model test. Background technique [0002] In the field of coastal engineering physical model tests, especially in experiments involving sediment movement, terrain, as an important factor affecting wave motion, has been in a process of dynamic change. Therefore, the acquisition of dynamic terrain data is very important for studying the mechanism of experiments. . The traditional topographic measurement methods mainly rely on tools such as total stations and ultrasonic rangefinders. Although they have the advantages of high precision, they have great limitations because they cannot be used in the presence o...

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a dynamic comprehensive observation method for the bottom bed of a coastal engineering sediment physical model test, to solve the problem that the dynamic observation of the bottom bed during the test process cannot be realized in the prior art, and the cost of the new test measurement method High and complex operation defects, suitable for use in tank tests, to achieve synchronous real-time observation of the dynamic evolution of the entire physical model test bed, and easy to operate and low cost

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