Roadbed protective system in debris flow gully and implementation method for roadbed protective system

Abstract

The invention discloses a roadbed protective system in a debris flow gully and an implementation method for the roadbed protective system, and the roadbed protective system is arranged along the debris flow gully (7). The roadbed protective system comprises a blocking dam (2), a stop and deposit field (3), a drainage guide culvert (4) and an energy dissipation slot (5), wherein the blocking dam (2) is positioned in an upstream channel of the debris flow gully (7); the stop and deposit field (3) is positioned between the blocking dam (2) and a roadbed filling body (1) arranged at the downstream; an inlet of the drainage guide culvert (4) is mutually jointed with the stop and deposit field (3); the drainage guide culvert (4) transversely penetrates through the roadbed filling body (1); and a downstream slope surface at the outlet of the drainage guide culvert (4) is jointed with the energy dissipation slot (5). The roadbed protective system overcomes the defects that a drainage guide structure in the prior art is easily damaged and finally causes the roadbed to be destroyed by rush of water, and has the advantages of reducing scouring, on the both sides of the channel, of debris flow, and prevents most of rock blocks from discharging.

Description

Background technique [0001] The invention relates to the technical field of highway mud-rock flow prevention and control, and more specifically relates to a roadbed protection system in a mud-rock flow ditch and an implementation method. Background technique [0002] When mountain roads shuttle through the mountains, they often encounter debris flow valleys, where the valleys are deep and the slopes are steep, and the runoff in the rainy season is large and accompanied by debris flow disasters. There are mainly two ways to cross the road section of the debris flow ditch: 1. Bridge; 2. Subgrade filling body. Due to the characteristics of high speed, high energy, and large particle impact of debris flow, if a bridge is used, its structure is complicated and the cost is high. When debris flow passes in the ditch, it will pose a huge threat to the bridge structure. The subgrade filling body has a simple structure and can use road excavation materials, and the cost is relative...

AI Technical Summary

Problems solved by technology

The disadvantages of this method are: the route of the drainage tunnel is long, the construction period is long, and the project investment is large; in addition, a complex layered drainage structure needs to be built at the entrance of the tunnel to reduce maintenance costs and risk of blockage during tunnel drainage

[0004] For the high-fill road section in the valley, the problem of uneven settlement of the subgrade is more prominent, and the force of the drainage structure is uneven. The traditional masonry culvert or concrete culvert is easily cracked. , the drainage structure is easily damaged, and eventually the roadbed is washed away

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