Measuring method of internal flow velocity and impact force spatial distribution of viscous debris flow

Abstract

Aiming at solving the problems that flow velocity and impact of any point in any section of mud-flow cannot be measured in the prior art, the invention first provides a method for measuring viscous mud-flow internal flow velocity and impact force spatial distributions. The method for measuring flow velocity is based on the viscous mud-flow body Bingham model and the scour-and-fill balance principle; first, setting any section I-I, determining values such as h0, h(x), xa, xd, xb, xc of the section through the trial method; then calculating the flow depth of a mud-flow calculation infinitesimal surface at any point on the section according to formula 1; and finally substituting h into the Bingham-model-based viscous mud-flow flow velocity distribution formula to obtain flow velocity of the point. By means of the method for measuring flow velocity at any position in any section of mud-flow, the method for measuring spatial distribution of viscous mud-flow impact force is further obtained. The calculation result of the method has high accuracy, which can be applied in real design for viscous mud-flow prevention and control engineering. The measurement method is clear in thinking and simple in calculating, which is an improvement of the present prevention and control engineering design method which is based on uniform distribution.

Description

technical field

[0001] The invention relates to a measurement method, in particular to a method for measuring the spatial distribution of viscous debris flow average flow velocity and impact force, and belongs to the field of debris flow engineering prevention and control and the field of measurement technology. Background technique

[0002] Sand control dams and other prevention and control projects are the fastest, most common and effective measures to control debris flow disasters. In this kind of engineering design, it is necessary to measure the spatial distribution of debris flow impact load as one of the most important basis for dam design parameters.

[0003] The current domestic codes temporarily suggest that the load should be considered as uniform distribution in the design of debris flow control dams and other prevention and control projects, which is very different from the actual load distribution. On the one hand, the value of the uniformly distributed load i...

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