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Calculation method of starting flow velocity of channel sediment block under high sediment flow

A technology of high sand content flow and starting velocity, applied in the direction of hydraulic model, etc., can solve problems such as not taking into account the physical properties of sediment blocks

Inactive Publication Date: 2016-09-07
CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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Problems solved by technology

However, the existing research on channel sediment blocks does not take into account the influence factor of the physical properties of the sediment blocks themselves, and there is a lack of a calculation method for directly calculating the starting velocity of channel sediment blocks under the action of high-sediment flow based on measured data

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  • Calculation method of starting flow velocity of channel sediment block under high sediment flow
  • Calculation method of starting flow velocity of channel sediment block under high sediment flow
  • Calculation method of starting flow velocity of channel sediment block under high sediment flow

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Embodiment Construction

[0033] Combine below figure 1 with figure 2 , the present invention is described in detail.

[0034] The method for measuring and calculating the starting flow velocity of the channel sediment block under the action of high-sediment water flow of the present invention comprises the following steps:

[0035] (1) At first, set up the mathematical model that the present invention adopts, also set forth the principle of the present invention simultaneously. Most of the sedimentary blocks naturally formed in the river channel are clay blocks formed by clay. For the convenience of theoretical analysis, it is assumed that the sedimentary block is a thin cylindrical shape. figure 1 , where: G is the gravity of the sediment block; F s is the shearing force on the sediment block; F f is the buoyancy force on the sediment block; F max is the upward lifting force of the sediment block when it starts under the action of high-sedinity flow.

[0036] According to the principle of stat...

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Abstract

The invention relates to an application method of a hydraulic mathematical model, in particular to a method for calculating starting speed of channel deposit blocks under the action of hyperconcentrated flow with the hydraulic mathematical model, and belongs to the field of water conservation. According to the method, when the mathematical model is established, parameters representing intrinsic physical characteristics of the deposit blocks are introduced in, test and measured data of a to-be-calculated channel segment are combined for calculating critical starting coefficients of the channel deposit blocks, force conditions when the deposit blocks are started can be reflected more really, and the starting speeds of the deposit blocks different in size can be calculated accurately.

Description

Technical field: [0001] The present invention relates to an application method of a hydraulic mathematical model, in particular to a method for measuring and calculating the starting flow velocity of a river sediment block by using a hydraulic mathematical model under the action of a high-sedinity flow. Its IPC international patent classification number is E02B1 / 00, E02B 1 / 02, belonging to the field of water conservancy. Background technique: [0002] Most of the studies related to the starting velocity focus on the study of river sediment. Scholars at home and abroad have proposed many calculation methods and calculation formulas for the starting velocity of sediment through years of research. However, the movement law of sediment before cementation is different from that after cementation, and the physical state and stress situation have changed greatly. Therefore, the existing formula of sediment velocity cannot be applied to river sediment blocks. In recent years, some...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B1/02
Inventor 张慧范北林朱勇辉岳红艳李会云甘孝清刘心愿张文二
Owner CHANGJIANG RIVER SCI RES INST CHANGJIANG WATER RESOURCES COMMISSION
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