A ladder-shuangtan structure-type mountain torrent debris flow drainage channel and its application

Abstract

The invention discloses a mountain torrent debris flow drainage trough of a stair-double pond structure. The mountain torrent debris flow drainage trough of the stair-double pond structure is suitable for mountain torrent debris flow gullies with an especially large gully bed longitudinal slope. The trough bottom of the drainage trough comprises a plurality of full-lining stair segments and a double-pond segment filling the space between an upstream stair segment and a downstream stair segment. The stair segments comprise upper end notched sills on the upstream, lower end notched sills on the downstream and full-lining base plates connected with the upper end notched sills and the lower end notched sills. The double-pond segment comprises an upper pond on the upstream, a lower pond on the downstream and inter-pond notched sills between the upper pond and the lower pond, the top face of the upper pond is flush with the top faces of the inter-pond notched sills, and the top face of the lower pond is flush with the highest position of the downstream stair segment. A rigid protection bottom is adopted by the upper pond, and steel cable net box bodies and energy consumption stone are laid at the protection bottom in sequence. A rigid protection bottom is adopted by the lower pond, and energy consumption stone is laid at the protection bottom. Compared with the prior art, the stair-double pond structure is fully utilized for adjusting the flowing speed of mountain torrent debris flow and controlling washout of a mountain torrent debris flow body on the trough bottom, the normal drainage function can be achieved, and later maintenance cost is lowered.

Description

technical field [0001] The invention relates to a prevention and control technology of mountain torrent and mud-rock flow, in particular to a step-shuangtan structure-type mountain torrent and mud-rock flow drainage channel suitable for a particularly large ditch bed vertical gradient drop mountain torrent and mud-rock flow ditch. Background technique [0002] Torrents and debris flow disasters are one of the main types of geological disasters in my country. With the development of the mountain economy and the deepening of the western development, the demand for prevention and control of mountain torrents and debris flows is becoming more and more strong. As one of the main types of mountain torrent and debris flow prevention and control projects, drainage channels are widely used in torrent and debris flow control. [0003] After the Wenchuan Earthquake, a large number of torrential and debris flow gullies with extremely large gully-bed vertical gradients appeared, and the...

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Problems solved by technology

[0004] The purpose of the present invention is to address the deficiencies in the prior art, and aim at the particularly large vertical gradient of the ditch bed and the frequent occurrence of torrent and debris flows. The strong abrasion and scouring of the torrent and debris fluid often cause serious damage to the bottom of the drainage channel, which cannot be used normally. In the case of high maintenance costs in the later period, it is necessary to provide a ladder-shuangtan structure-type mountain torrent and debris flow drainage channel with high safety, low maintenance costs, and the discharge of torrents and debris flows at the same time, which is suitable for special large-scale trench bed longitudinal gradient torrents and debris flow ditch

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