Device for measuring scouring depth of pier downstream river bed

Abstract

The embodiment of the invention provides a device for measuring a scouring depth of a pier downstream river bed. The device comprises a floating body, an anchoring system, a positioning system, a propulsion system and a control system. The floating body floats on the water surface above a measured bed surface, an ultrasonic distance measurement instrument on the floating body measures the height value between the floating body and a measuring point on the surface of the measured river bed and transmits the height value to the control system. The positioning system is arranged on the anchoring system and the floating body, calculates three-dimensional space coordinates of the floating body and transmits the three-dimensional space coordinates to the control system. The control system calculates three-dimensional space coordinates of the measuring point on the surface of the measured river bed. According to the device, the floating body replaces a ship to serve as a carrier for measuring the local scouring depth, the device has the advantages of being fully automatic and running in all weather, and all-day 24-hour continuous autonomous measurement can be performed. The safety of operators or the instrument is not endangered when the measurement is performed under the flood conditions. Therefore, it is guaranteed that prior to the scouring endangering bridge safety, an alarm is given timely, and the basis is provided for bridge protection and traffic control.

Description

technical field [0001] The invention relates to the technical field of measuring the scour depth of a river bed, in particular to a measuring device for the scour depth of a river bed downstream of a bridge pier. Background technique [0002] The bridge across the river is an important part of the modern transportation system. A bridge accident will not only cause direct loss of life and property, but also have a potential impact on the normal development of the national economy. According to many surveys, being destroyed by floods is the main reason for the failure of modern bridges at home and abroad, and the mechanism of bridge destruction by floods may be due to excessive local erosion around the bridge piers, or because the riverbed downstream of the bridge piers is rapidly scoured as a whole , making the pier lose stability along the flow direction. Sand mining pits formed by irregular sand mining on most rivers in my country are potential factors that induce overall ...

AI Technical Summary

Problems solved by technology

First of all, the existing method requires manual boating to the measurement area, which consumes a lot of manpower and material resources, and at the same time cannot achieve 24-hour online real-time monitoring

Secondly, during the flood period when scour monitoring is most needed, the water flow downstream of the pier is often turbulent, and it is extremely dangerous to go to this area, and even the conditions for passing ships are not available at all, so it is impossible to carry out measurements

Thirdly, the satellite signal of the GPS locator is weak in the mountains and valleys, and it is difficult to accurately obtain the spatial position of the measurement point when carrying out measurements in these areas

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