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Impact force calculation method for viscous debris flow, and application thereof

A technology of debris flow and impact force, which is applied in the application field of debris flow retaining engineering design, can solve problems such as not specifically considering the influence of particle gradation of viscous debris flow, and achieve accurate and reasonable calculation results, few parameters, and easy access

Inactive Publication Date: 2018-09-21
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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  • Claims
  • Application Information

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Problems solved by technology

At present, the calculation of the impact force of viscous debris flow is mainly carried out by correcting the hydrodynamic pressure, but these calculation formulas do not specifically consider the influence of particle gradation of viscous debris flow

Method used

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  • Impact force calculation method for viscous debris flow, and application thereof
  • Impact force calculation method for viscous debris flow, and application thereof
  • Impact force calculation method for viscous debris flow, and application thereof

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Embodiment Construction

[0025] The preferred embodiments of the present invention will be further described below.

[0026] A debris flow ditch is located in Lvmao Township, Dongchuan District, Kunming City, Yunnan Province. It is a ditch on the right bank of the Xiaojiang River Basin, a first-level tributary of the Jinsha River Basin. The basin generally extends east-west, with a catchment area of ​​48.6km 2 , the total length of the main ditch is 19.3km, and the relative altitude of the basin is 2226m. The mud-rock flow in this gully has a clay content of 9%, which is a typical viscous mud-rock flow. In the history, there have been many large-scale mud-rock flows in the gully, flooding the downstream farmland and blocking the small river, causing huge disasters.

[0027] In order to prevent and control debris flow disasters, it is planned to build debris flow retaining works in the upstream branch of the ditch, and one of the retaining dams is proposed to be a masonry gravity retaining dam. The m...

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Abstract

The invention discloses an impact force calculation method for a viscous debris flow, and application thereof. The calculation method comprises the following steps that: firstly, through sample experiment screening, determining a maximum particle size and a median particle size in a debris flow body, then, through sampling actual measurement, determining debris flow body density and debris flow kinematic velocity, and finally, carrying out calculation to obtain the impact force of the viscous debris flow. By use of the method, the influence of viscous debris flow particle graduation is comprehensively considered, the empirical coefficient of a dynamic pressure impact force calculation formula is corrected through a flume experiment, parameters required by calculation can be obtained through field survey, sampling and experiment analysis, the impact force of viscous debris flow motion can be reasonably determined, a basis is provided for viscous debris flow prevention and treatment engineering, and the method is suitable for the practical engineering design requirements of the viscous debris flow.

Description

technical field [0001] The invention relates to a method for measuring and calculating the impact force of viscous mud-rock flow and its application in design of mud-rock flow blocking engineering. Background technique [0002] Debris flow is a common geological disaster in mountainous areas of China. In recent years, under the disturbance of increasing seismic activity, coupled with the significant increase in extreme weather caused by global climate change, debris flow activities are very active, major debris flow disasters occur frequently, and the safety of people's lives and property is seriously endangered and threatened. In order to ensure the sustainable development of the mountain economy, the prevention and control of debris flow is very necessary. [0003] The impact force of debris flow is an indispensable parameter in the engineering design of debris flow prevention and control. Due to the strong structure of the viscous debris flow and its strong straightness...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20G06F2119/06
Inventor 唐金波胡凯衡陈剑刚胡旭东
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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