A Calculation Method and Application of the Superelevation Position of the Largest Bend of Debris Flow

A calculation method and debris flow technology, applied in design optimization/simulation, instrumentation, informatics, etc., can solve the problem of not being able to provide an accurate calculation of the maximum curve superelevation position, inaccurate curve superelevation value, and affecting debris flow prevention and control projects prevention effects etc.

Active Publication Date: 2020-10-23
CHENGDU UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The optimization method for the design of debris flow retaining dams disclosed in this patent document under the action of eccentric loads calculates the flow velocity lateral distribution on the cross section through the equal angular velocity ω of the debris flow passing through the bend and the peak flow Qc of the fortified debris flow. The flow velocity is used to replace the longitudinal flow velocity, which is not consistent with the actual situation, and the curve superelevation value of the debris flow is inaccurate; it cannot provide a model for accurately calculating the maximum curve superelevation position of the debris flow at different curves and speeds, and cannot be effective Provide scientific data reference for the design of debris flow retaining dams, and affect the prevention and control effect of debris flow prevention and control projects

Method used

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  • A Calculation Method and Application of the Superelevation Position of the Largest Bend of Debris Flow
  • A Calculation Method and Application of the Superelevation Position of the Largest Bend of Debris Flow
  • A Calculation Method and Application of the Superelevation Position of the Largest Bend of Debris Flow

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Embodiment 1

[0032] A method for calculating the superelevation position of the largest curve of a debris flow, comprising the following steps:

[0033] a. Obtain the average flow velocity V of the debris flow in the place where the debris flow occurs, in m / s, and measure the width of the debris flow channel B in the place where the debris flow occurs, in m;

[0034] b. On-site measurement of the radius of curvature R of the center of the debris flow bend at the place where the debris flow occurs, in m;

[0035] c. Measure and calculate the yield stress τ of debris flow, in Pa;

[0036] d. Measurement and calculation of debris flow density p, unit kg / m 3 ; Calculate the maximum superelevation position θ of the debris flow curve according to formula 1, unit degree;

[0037]

[0038] In the present invention, "a. Obtain the average flow velocity V of the debris flow at the place where the debris flow occurs, in m / s, and measure the width of the debris flow channel B at the place where t...

Embodiment 2

[0040] A method for calculating the superelevation position of the largest curve of a debris flow, comprising the following steps:

[0041] a. Obtain the average flow velocity V of the debris flow in the place where the debris flow occurs, in m / s, and measure the width of the debris flow channel B in the place where the debris flow occurs, in m;

[0042] b. On-site measurement of the radius of curvature R of the center of the debris flow bend at the place where the debris flow occurs, in m;

[0043] c. Measure and calculate the yield stress τ of debris flow, in Pa;

[0044] d. Measurement and calculation of debris flow density p, unit kg / m 3 ; Calculate the maximum superelevation position θ of the debris flow curve according to formula 1, unit degree;

[0045]

[0046] The present invention is applicable to the calculation of the maximum curve superelevation position of debris flow at different curves and different speeds.

[0047] Furthermore, it is suitable for large-sca...

Embodiment 3

[0049] A method for calculating the superelevation position of the largest curve of a debris flow, comprising the following steps:

[0050] a. Obtain the average flow velocity V of the debris flow in the place where the debris flow occurs, in m / s, and measure the width of the debris flow channel B in the place where the debris flow occurs, in m;

[0051] b. On-site measurement of the radius of curvature R of the center of the debris flow bend at the place where the debris flow occurs, in m;

[0052] c. Measure and calculate the yield stress τ of debris flow, in Pa;

[0053] d. Measurement and calculation of debris flow density p, unit kg / m 3 ; Calculate the maximum superelevation position θ of the debris flow curve according to formula 1, unit degree;

[0054]

[0055] The invention is suitable for road and bridge engineering construction.

[0056] It is suitable for the construction of road and bridge projects. By accurately calculating the superelevation position of th...

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Abstract

The invention relates to a debris flow maximum curve ultrahigh position calculating method and application and belongs to the technical field of debris flow prevention and control engineering. The method comprises the steps that a, the average debris flow velocity V of a debris flow locality is obtained, and the debris flow channel width B of the debris flow locality is measured on site; b, the debris flow curve center curvature radius R of the debris flow locality is measured on site; c, the debris flow yield stress tau is measured on site; d, the debris flow density rho is measured; the debris flow curve maximum ultrahigh position theta is calculated according to the formula 1. The method and application follow the theory of dimensional homogeneity, can provide a model which can accurately calculate the maximum curve ultrahigh position of the debris flow in different curves and at different speeds, can provide better theoretical data reference for debris flow defensive measures, accordingly can effectively prevent personal casualty and property loss, has higher disaster prevention applicability for disaster reduction of the debris flow and greatly improves the prevention and control effect of the debris flow.

Description

technical field [0001] The invention relates to the technical field of debris flow prevention and control engineering, in particular to a method for calculating the superelevation position of the largest curve of debris 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. [0003] 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 eru...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20
CPCG16Z99/00
Inventor 余斌李龙刘清华
Owner CHENGDU UNIVERSITY OF TECHNOLOGY
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