Comprehensive treatment measure for preventing and treating channel debris flow starting and design method thereof

Abstract

The invention provides a comprehensive treatment measure for preventing and treating channel debris flow starting and a design method thereof, and belongs to the field of debris flow prevention engineering. According to the comprehensive treatment measure, a check dam group is arranged in a debris flow formation area to lift an erosion datum plane, then a structural body is buried in a debris flow gully bed, the surface of the structural body is flush with a gully, the structural body is composed of at least one structural single body, the structural single body is a gabion net square grid, a reinforcing layer is arranged on the surface layer of the gully bed; the gabion net is filled with rocks which are not prone to weathering, and an original ditch bed is arranged in the middle of square grids of the gabion net. Finally, arbor and / or shrub are / is planted in the square grids of the gabion net, and the planted vegetation is preferably selected from indigenous species which are developed in root system and resistant to drought and flood. According to the comprehensive treatment measure for preventing and treating channel debris flow starting and the design method thereof, the check dam group is arranged to inhibit traceability erosion, and the gully bed is stabilized through the measures of arranging the gabion net and planting the vegetation, so that the starting of substances in the gully bed is inhibited, and the situation that the vegetation is not rooted in an initial planting stage is guaranteed. Through combination of engineering measures and ecological measures, debris flow is effectively prevented and stopped, or the scale of the debris flow is reduced.

Description

technical field [0001] The invention belongs to the field of mud-rock flow prevention and control engineering, and in particular relates to a channel mud-rock flow comprehensive prevention and control technology and a design method combining engineering measures and ecological measures. Background technique [0002] The large-scale deforestation from the 1850s to the 1880s greatly reduced the forest coverage rate of the Bailongjiang River Basin in Gansu Province, resulting in serious degradation of vegetation in low mountainous areas. In addition, land reclamation on steep slopes was very common, resulting in the loss of vegetation protection in loess areas and loose slope areas. And a large number of exposures have exacerbated the occurrence of geological disasters such as mudslides and landslides. At the same time, the weak rock masses are widely distributed in the watershed, the soil is poor, and the water conservation capacity is poor. In addition, there are generally th...

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Problems solved by technology

[0005] However, as described in the background technology of CN 107059891A, the main problems of the debris flow retention project are that the project volume is large and there are many restrictions on use. Although the ecological project has a small investment and can improve the natural environment, the plants planted in the valley are vulnerable to rainfall and water flow. erosion, and it takes a long time to play its role, so it cannot effectively prevent the occurrence of debris flow

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