The Calculating Method of Deposition Thickness of Viscous Debris Flow

2012 ◽  
Vol 524-527 ◽  
pp. 808-812
Author(s):  
Yong You ◽  
Xue Ping Lin ◽  
Jin Feng Liu
Keyword(s):  
Debris Flow ◽  
Calculation Method ◽  
Flow Cell ◽  
Force Analysis ◽  
Slope Gradient ◽  
Calculating Method ◽  
Maximum Value ◽  
Viscous Debris Flow ◽  
Deposition Thickness ◽  
Theoretical Mechanics

The deposition thickness is one of the most important parameters of debris flow. How to define the deposition shape along the viscous debris flow gully and how to calculate deposition thickness rationally were rarely studied in previous researches. This paper discussed the calculation method of deposition thickness of viscous debris flow based on theoretical deduction. Firstly, force analysis was carried out for a debris flow cell selected from the deposition. Then, the formula for calculating the deposition thickness of viscous debris flow was constructed based on deduction from the viewpoint of theoretical mechanics. At last, the deposition thickness under different slope gradients, yield stresses and densities was calculated based on the deduced formula. The results showed that the deposition thickness decreases with the increasing of the slope gradient and density, and increases with the increasing of the yield stress before the deposition thickness reaches to the maximum value.

The Calculating Method of Erosion Depth of Viscous Debris Flow

2012 ◽  
Vol 204-208 ◽  
pp. 3441-3444
Author(s):  
Yong You ◽  
Yan Bo Zhao ◽  
Jin Feng Liu
Keyword(s):  
Debris Flow ◽  
Good Method ◽  
Gully Erosion ◽  
Affecting Factors ◽  
Erosion Depth ◽  
Calculating Method ◽  
Viscous Debris Flow ◽  
Bed Erosion ◽  
Debris Flow Disaster ◽  
Theoretical Mechanics

Gully erosion depth is one of the most important parameters for the assessment and prevention of debris flows. So far, there is no good method for calculating the gully bed erosion depth of viscous debris flow. This paper discussed the calculation method of erosion depth of viscous debris flow based on theoretical deduction. The formula for calculating the erosion depth was constructed based on deduction from the viewpoint of theoretical mechanics. Then, the affecting factors of gully erosion were discussed. This method can be used to calculate the erosion depth for viscous debris flow under different frequencies and provide a better evaluation and prevention tool for mitigating debris flow disaster.

Quantitative investigation of sediment regulation performance of slot-check dam on viscous debris flow

2021 ◽  
Vol 14 (14) ◽  
Author(s):  
Jinfeng Liu ◽  
Huaquan Yang ◽  
Wenbing Zhou ◽  
Yong You ◽  
Hao Sun ◽  
...  
Keyword(s):  
Debris Flow ◽  
Check Dam ◽  
Quantitative Investigation ◽  
Viscous Debris Flow

Optimal Solution for Hyper-Sphere Integral Classification Process of Big Data

2014 ◽  
Vol 687-691 ◽  
pp. 1462-1465
Author(s):  
Zhi Liang Zhang
Keyword(s):  
Big Data ◽  
Calculation Method ◽  
Optimal Solution ◽  
Constraint Condition ◽  
Target Problem ◽  
Maximum Value ◽  
Dual Programming ◽  
Optimal Classification ◽  
Classification Function ◽  
Optimal Calculation

This paper mainly discusses the optimal solution for hyper-sphere integral classification process of big data. The paper proposes an optimal calculation method for the target problem. Through statistics and analysis of big data, we get the constraint condition, and calculate a maximum value of data characteristic. Then, by the dual programming of Quadratic Programming, we obtain the optimal classification function for hyper-sphere integral classification process of big data. The experiment results show that the proposed algorithm can significantly improve the accuracy of the classification hyper-sphere integral for big data.

scholarly journals A Condition of Occurrence On The Roll Waves Of Viscous Debris Flow

2004 ◽  
Vol 7 ◽  
pp. 813-820 ◽  
Author(s):  
Muneyuki ARAI ◽  
Xuelan LIU ◽  
Nobuhiko TAHARA
Keyword(s):  
Debris Flow ◽  
Roll Waves ◽  
Viscous Debris Flow

scholarly journals Dimensionless Assessment Method of Landslide Dam Formation Caused by Tributary Debris Flow Events

Geofluids ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-14 ◽  
Author(s):  
Kun-Ting Chen ◽  
Xiao-Qing Chen ◽  
Gui-Sheng Hu ◽  
Yu-Shu Kuo ◽  
Yan-Rong Huang ◽  
...  
Keyword(s):  
Debris Flow ◽  
Water Depth ◽  
Debris Flows ◽  
Landslide Dam ◽  
Assessment Method ◽  
Main Stream ◽  
Deposition Thickness ◽  
The Relationship ◽  
Prepared Response

In this study, we develop a dimensionless assessment method to evaluate landslide dam formation by considering the relationship between the run-out distance of a tributary debris flow and the width of the main stream, deposition thickness of the tributary debris flow, and the water depth of the main stream. Based on the theory of debris flow run-out distance and fan formation, landslide dam formation may result from a tributary debris flow as a result of two concurrent formation processes: (1) the run-out distance of the tributary debris flow must be greater than the width of the main stream, and (2) the minimum deposition thickness of the tributary debris flow must be higher than the in situ water depth of the main stream. At the confluence, one of four types of depositional scenarios may result: (1) the tributary debris flow enters into the main stream and forms a landslide dam; (2) the tributary debris flow enters into the main stream but overflow occurs, thus preventing complete blockage of the main stream; (3) the tributary debris flow enters into the main stream, does not reach the far bank, and sediment remains partially above the water elevation of the main stream; or (4) the tributary debris flow enters into the main stream, does not reach the far bank, and sediment is fully submerged in the main stream. This method was applied to the analysis of 11 tributary debris flow events during Typhoon Morakot, and the results indicate that the dimensionless assessment method can be used to estimate potential areas of landslide dam formation caused by tributary debris flows. Based on this method, government authorities can determine potential areas of landslide dam formation caused by debris flows and mitigate possible disasters accordingly through a properly prepared response plan, especially for early identification.

Cogging Force Analysis of Moving Magnet Type Permanent Magnet Synchronous Linear Servo Motor

2015 ◽  
Vol 741 ◽  
pp. 663-668
Author(s):  
Zhi Gang Shen ◽  
Qing Wang ◽  
Qing Jie Sun ◽  
Hong Xing Wu
Keyword(s):  
Permanent Magnet ◽  
Structural Characteristics ◽  
Linear Motor ◽  
Middle Part ◽  
Servo Motor ◽  
Direct Drive ◽  
Force Analysis ◽  
Detent Force ◽  
Maximum Value ◽  
Moving Magnet

Linear motor eliminates the middle part of mechanical drive train, but because of structural characteristics of itself, must to take effective measures to reduce thrust fluctuations, or direct drive will lost its original meaning. In this paper, firstly research on detent force of moving magnet type permanent magnet synchronous linear servo motor and analyze the principle of generate detent force, secondly analyze the cogging force of moving magnet type permanent magnet synchronous linear motor and obtain the expression of cogging force maximum value, finally propose effective method to reduce detent force.

Internal Force Analysis of Frame Structure Considering the Soil Constraint

2015 ◽  
Vol 777 ◽  
pp. 38-41
Author(s):  
Shu Zhi Liu
Keyword(s):  
Soil Column ◽  
Internal Force ◽  
The Body ◽  
Frame Structure ◽  
Force Analysis ◽  
Ground Floor ◽  
Calculating Method ◽  
The Earth

Part of the bottom column in the frame structure is buried in the soil,sometimes it should be considered the affects from the body of the soil when calculating the ground floor of the frame structure. The Winkler assumes is quoted in this article, as considering the coefficient of the Soil-column interaction, the equivalent height calculating formula of the column restrained by the earth is deduced , this can change the frame structure that restrained by the earth into the commonly structure to calculate. It illustrates that the restrained load by the earth in the bottom of the structure has the big affects on the internal force and lateral. It provides a simple calculating method for such structure.

Rainfall threshold calculation method for debris flow pre-warning in data-poor areas

2013 ◽  
Vol 24 (5) ◽  
pp. 854-862 ◽  
Author(s):  
Huali Pan ◽  
Jiangcheng Huang ◽  
Ren Wang ◽  
Guoqiang Ou
Keyword(s):  
Debris Flow ◽  
Calculation Method ◽  
Rainfall Threshold
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