Method for designing comb dam opening width of non-viscous debris flow

Abstract

The invention relates to the technical field of debris flow disaster prevention and control engineering, in particular to a method for designing the comb dam opening width of non-viscous debris flow.The method includes the steps: performing debris flow disaster prevention and control engineering investigation on debris flow gullies needing engineering prevention and control, and determining the diameters dmax of maximum solid particle matters in gully debris flow when the density of the gully debris flow is smaller than 2000kg / m<3>; determining functions of each level of comb dam, and namely,determining that the comb dam is used for intercepting debris flow solid matters and further used for adjusting the speed of debris flow; calculating relative opening b / dmax of each level of comb damto obtain the opening width of the comb dams. According to the method, a quantitative design method of the comb dam opening width is provided based on a fact that types of the debris flow are defined, and the method overcomes the shortcoming that optimal control effects of the comb dam cannot be played by a design method based on experience.

Description

technical field [0001] The invention relates to the technical field of mud-rock flow disaster prevention and control engineering, in particular to a method for designing the opening width of a comb dam aimed at non-viscous mud-rock flow. Background technique [0002] Debris flow, as a common geological disaster, has the characteristics of fast flow, large scale, sudden occurrence, wide deposition range and strong impact force. When mudslides break out, they often destroy infrastructure such as roads and railways, block rivers and even destroy villages, causing huge loss of life and property. With global warming, extreme climates are increasing, human economic activities are further expanding to mountainous areas, people's lives and property are increasingly threatened by mudslides; in addition, my country's emphasis on the construction of ecological civilization has reached an unprecedented height. In view of the above reasons, it is extremely urgent to prevent and control ...

AI Technical Summary

Problems solved by technology

[0010] From the existing engineering practice and experimental research, it has been shown that when the comb dam opening width b≤(1.5~2.0)d max At this time, the opening of the comb dam is blocked, and all the large and small particles in the debris flow are stored, so the storage capacity of the comb dam is easily silted up by the solid material of the debris flow and fails

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