Box body lining type mudslide discharging and guiding groove and application and construction method thereof

Abstract

The invention discloses a box body lining type mudslide discharging and guiding groove suitable for mudslide with great longitudinal river slope of a gully bed, and an application and construction method thereof. The discharging and guiding groove comprises a groove bottom and side walls at two sides of the discharging and guiding groove, wherein the groove bottom comprises a transverse penetrating type ribbed threshold and a plurality of stages of baffle sills which are filled between an upstream ribbed threshold and a downstream ribbed threshold and are distributed in a stepped shape; each-stage baffle sill is formed by connecting a plurality of prefabricated reinforced concrete rectangular box bodies along the direction of the transversely penetrating the discharging and guiding groove; the top surface of each rectangular box body is opened; other five surfaces of each rectangular box body are closed; and each rectangular box body is filled with soil mass. Compared with the prior art, mutual action between the soil mass filled in the rectangular box bodies and the mudslide is used to consume the movement kinetic energy of part of the mudslide, regulate and control the flow speed of the mudslide and control the corrosion and the scouring of the mudslide to the groove bottom, so that the safety of the discharging and guiding groove is improved and the later-stage maintenance expense is reduced; compared with a full-lining type groove, the box body lining type mudslide discharging and guiding groove has the construction period shortened by 10-30 percent and the later-stage maintenance expense reduced by 50-80 percent; and compared with a soft-foundation energy dissipation type groove, the box body lining type mudslide discharging and guiding groove has the later-stage maintenance expense reduced by 30-50 percent.

Description

technical field [0001] The invention relates to a mud-rock flow prevention technology, in particular to a box-lined mud-rock flow drainage guide groove suitable for a large ditch bed vertical gradient and a construction method thereof. Background technique [0002] Debris flow disaster is one of the main types of geological disasters in my country. With the development of the mountainous economy and the deepening of the western development, the demand for debris flow control is becoming more and more vigorous. As one of the main types of debris flow prevention and control engineering, drainage channels are widely used in debris flow control. [0003] After the Wenchuan Earthquake, a large number of landslides provided a rich source of solid matter for the formation of debris flows, and a large number of debris flows in ultra-small watersheds and slope debris flows occurred. The vertical gradient of this type of debris flow is very large, generally exceeding 0.15. Even up t...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the deficiencies of the prior art, and to solve the situation that the strong abrasion and scouring action of the debris flow often causes serious damage to the bottom of the drainage channel, cannot be used normally, and the maintenance cost is high in the later period when the vertical gradient of the trench bed is large. Provide a box-lined debris flow drainage channel with high safety, low maintenance cost, beneficial to the ecological restoration of the channel, and suitable for large trench bed vertical slope debris flow and its construction method

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