A comprehensive treatment measure and its application to prevent and control the initiation of gully debris flow

Abstract

The invention provides a comprehensive treatment measure and a design method for preventing and controlling the start-up of mud-rock flow in trenches, belonging to the field of mud-rock flow prevention and control engineering. The comprehensive treatment measures are to set up the Gufang group in the debris flow formation area to raise the erosion base, and then bury the structure on the debris flow ditch bed. The surface of the structure is flush with the ditch. The structure is composed of at least one structural unit. The body is a gabion grid, the surface of the ditch bed is provided with a reinforcement layer, the inside of the gabion is filled with rocks that are not easily weathered, and the middle of the gabion grid is the original ditch bed; finally, trees and / or trees are planted in the middle of the gabion grid. For shrubs, native species with well-developed root systems and tolerance to drought and flood are preferred as the vegetation to be planted. In the present invention, the Gufang group is set up to suppress trace-back erosion, and the measures of laying gabion nets and planting vegetation are used to stabilize the ditch bed, inhibit the start-up of the ditch bed material, and ensure that the vegetation will not be uprooted at the initial stage of planting. Through the combination of engineering measures and ecological measures, effectively prevent and stop the occurrence of debris flow or reduce its scale.

Description

technical field [0001] The invention belongs to the field of debris flow prevention and control engineering, and particularly relates to a channel debris flow comprehensive prevention 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 in the Bailongjiang River Basin in Gansu Province, resulting in serious vegetation degradation in the low mountain 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 exposed, aggravated the occurrence of geological disasters such as mudslides and landslides. At the same time, the weak rock mass in the basin is widely distributed, the soil is poor, the water conservation capacity is poor, and there are generally thick (about 50 meters thick) loose deposits in the d...

AI Technical Summary

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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