A method for calculating equilibrium slope of debris flow and its application

A technology for balancing slope and debris flow, applied in data processing applications, special data processing applications, calculations, etc., can solve the problem that the drainage channel cannot play a better guiding role, does not take into account the effect of debris flow balancing slope, and is unfavorable for large-scale fields Prevention and control of engineering applications and other issues, to achieve the effect of improving disaster prevention applicability, high disaster prevention applicability, and convenient calculation

Active Publication Date: 2019-02-12
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The method for calculating the flow rate at the overflow port of the debris flow sand check dam disclosed in this patent document considers the conditions of the channel and the nature of the debris flow itself, and obtains the flow coefficient equation and the flow rate equation at the overflow port through theoretical derivation to determine the flow coefficient. It can determine the flow rate and provide a basis for the design of debris flow disaster prevention and control projects. However, because the balance slope of debris flow is not considered, it cannot play a better guiding role in the construction of drainage channels, resulting in poor disaster prevention applicability. It is not conducive to the application of large-scale control projects in the field

Method used

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  • A method for calculating equilibrium slope of debris flow and its application
  • A method for calculating equilibrium slope of debris flow and its application
  • A method for calculating equilibrium slope of debris flow and its application

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Experimental program
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Effect test

Embodiment 1

[0038] A method for calculating the balance slope of a debris flow, comprising the following steps:

[0039] a. Measure the yield stress τ through on-site investigation, the unit is pa; through the field bulk density experiment, determine the debris flow bulk density p, the unit is kg / m 3 , measure the flow depth h of debris flow through on-site investigation, and the unit is m;

[0040] b. Substitute the yield stress τ, debris flow bulk density p, and debris flow depth h in step a into Equation 1 to determine the dimensionless yield stress τ * ;

[0041]

[0042] In formula 1, g is the gravitational acceleration, which is 9.8m / s 2 ;

[0043] c, then the dimensionless yield stress τ obtained in step b * Substitute into formula 2 to determine the dimensionless slope S;

[0044] S=3.0887τ *1.3724 (Formula 2);

[0045] d. Finally, the dimensionless slope S obtained in step c is substituted into formula 3 to obtain the equilibrium slope a, unit degree;

[0046] S = tana ...

Embodiment 2

[0049] A method for calculating the balance slope of a debris flow, comprising the following steps:

[0050] a. Measure the yield stress τ through on-site investigation, the unit is pa; through the field bulk density experiment, determine the debris flow bulk density p, the unit is kg / m 3 , measure the flow depth h of debris flow through on-site investigation, and the unit is m;

[0051] b. Substitute the yield stress τ, debris flow bulk density p, and debris flow depth h in step a into Equation 1 to determine the dimensionless yield stress τ * ;

[0052]

[0053] In formula 1, g is the gravitational acceleration, which is 9.8m / s 2 ;

[0054] c, then the dimensionless yield stress τ obtained in step b * Substitute into formula 2 to determine the dimensionless slope S;

[0055] S=3.0887τ *1.3724 (Formula 2);

[0056] d. Finally, the dimensionless slope S obtained in step c is substituted into formula 3 to obtain the equilibrium slope a, unit degree;

[0057] S = tan...

Embodiment 3

[0061] A method for calculating the balance slope of a debris flow, comprising the following steps:

[0062] a. Measure the yield stress τ through on-site investigation, the unit is pa; through the field bulk density experiment, determine the debris flow bulk density p, the unit is kg / m 3 , measure the flow depth h of debris flow through on-site investigation, and the unit is m;

[0063] b. Substitute the yield stress τ, debris flow bulk density p, and debris flow depth h in step a into Equation 1 to determine the dimensionless yield stress τ * ;

[0064]

[0065] In formula 1, g is the gravitational acceleration, which is 9.8m / s 2 ;

[0066] c, then the dimensionless yield stress τ obtained in step b * Substitute into formula 2 to determine the dimensionless slope S;

[0067] S=3.0887τ *1.3724 (Formula 2);

[0068] d. Finally, the dimensionless slope S obtained in step c is substituted into formula 3 to obtain the equilibrium slope a, unit degree;

[0069] S = tan...

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Abstract

The invention discloses a debris flow equilibrium slope calculation method and an application thereof, belonging to the technical field of debris flow control works. The method comprises the following steps: measuring the yield stress tau with unit pa through field investigation; determining the debris flow volume weight p with unit kg / m<3> through an outdoor volume weight test, and measuring the debris flow depth h with unit m through field investigation; substituting the yield stress tau, the debris flow volume weight p and the debris flow depth h in the step (a) into a formula tau<*>=tau / pgh to determine the yield stress tau<*> of nondimensionalization; substituting the yield stress tau<*> of nondimensionalization obtained in the step (b) into a formula S=3.0887tau<*1.3724> to determine the slope S of nondimensionalization; and finally, substituting the slope S of nondimensionalization obtained in the step (c) into a formula S=tana to obtain the equilibrium slope. In the invention, the size effect is eliminated through nondimensionalization, the deduction into actual debris flow is facilitated, a theoretical basis is provided for the design of debris flow disaster control works, and the disaster prevention applicability is improved.

Description

technical field [0001] The invention relates to the technical field of mud-rock flow prevention and control engineering, in particular to a method for measuring and calculating the balance slope of mud-rock flow and its application. Background technique [0002] Debris flow is a torrent formed by heavy rain and floods after saturation and dilution of soft soil mountains containing sand and rocks. Its area, volume and flow are large, while landslides are areas of small areas of diluted soil mountains. Typical debris flows are caused by suspended It is composed of viscous mud rich in silt and clay with coarse solid clastics. Under appropriate terrain conditions, a large amount of water soaks the solid accumulations in the flowing water hillside or ditch bed, reducing its stability, and the solid accumulations saturated with water move under their own gravity, forming a debris flow. Debris flow is a disastrous geological phenomenon. Mudslides usually erupt suddenly and violen...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50G06Q50/26
CPCG06Q50/265G16Z99/00
Inventor 余斌禹磊
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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