A Calculation Method and Application of Superelevation of Viscous Debris Flow Bend

Abstract

The invention discloses a ramp turn superelevation calculation method for a viscose debris flow, and belongs to the technical field of prevention and control engineering for viscose debris flows. The ramp turn superelevation calculation method is characterized by comprising the following steps: a. obtaining an average flow speed V0 of debris flows in a place where the debris flows occur in former years, a ramp turn width B0 of the debris flows in the place where the debris flows occur in former years, and a ramp turn superelevation value Delta H0 of the debris flows in the place where the debris flows occur in former years, calculating a determination coefficient c according to a formula 1, obtaining an average flow speed V of the debris flow, and a ramp turn width B of the debris flow through field measurement, wherein the unit of the average flow speed is m / s, and the unit of the ramp turn width is m; and substituting the coefficient c obtained in the step d into a formula 2 to determine a ramp turn superelevation value Delta H of the debris flow, wherein the unit of the ramp turn superelevation value is m. The ramp turn superelevation value of the debris flow, which is obtained by the ramp turn superelevation calculation method disclosed by the invention, is more accurate, thus a better theoretic data reference can be provided for defense measures for the debris flow, higher disaster prevention applicability is achieved for disaster reduction for the debris flow, and a prevention and control effect for the debris flow is greatly improved.

Description

technical field [0001] The invention relates to the technical field of mud-rock flow prevention engineering, in particular to a method for calculating the superelevation of a viscous mud-rock flow curve 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 violently, and ...

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Problems solved by technology

[0004] 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. The curve superelevation value obtained for debris flow is inaccurate, and cannot effectively provide important data reference for the design of debris flow retaining dams, which affects the effect of debris flow prevention and control.

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