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Debris flow drainage channel of steel cable net bottom protection type and its application and construction method

A steel cable net and drainage channel technology, which is applied in water conservancy projects, artificial waterways, buildings, etc., can solve the problems of the bottom damage of drainage channels, high maintenance costs in the later period, and inability to use normally. The effect of reducing post-maintenance costs and improving project reliability

Active Publication Date: 2015-11-11
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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. Provides a steel cable net bottom protection type debris flow drainage channel with high safety, low maintenance cost, and suitable for large trench bed vertical slope debris flow trenches and its construction method

Method used

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  • Debris flow drainage channel of steel cable net bottom protection type and its application and construction method
  • Debris flow drainage channel of steel cable net bottom protection type and its application and construction method
  • Debris flow drainage channel of steel cable net bottom protection type and its application and construction method

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Embodiment 1

[0029] Such as figure 1 , figure 2 , image 3 shown. The drainage area of ​​a debris flow ditch is 1.86km 2 , in order to control debris flow disasters, it is planned to set up 2 sand-retaining dams in the middle of the basin, and build a 400m drainage channel on the accumulation fan. For the drainage channel, the vertical gradient i of the trench bed at the bottom of the channel is 0.35, and the discharge flow rate of debris flow is 98m 3 / s, bulk density 21kN / m 3 , in order to control the strong abrasion and erosion of debris flow, a steel cable net bottom protection type debris flow drainage channel is used. The steel cable net bottom protection type debris flow drainage trough includes the transverse penetrating rib sill 1 at the bottom of the trough arranged at a certain distance and the side walls 2 of the drainage trough on both sides, and steel cables are arranged between the adjacent upstream and downstream rib sills 1 Net 3 bottom protection, the steel cables ...

Embodiment 2

[0036] Such as figure 1 , figure 2 , image 3 shown. The drainage area of ​​a debris flow ditch is 9.52km 2 , in order to control debris flow disasters, it is planned to set up 4 sand-retaining dams in the middle of the basin, and build a drainage channel of 560m on the accumulation fan. For the drainage channel, the vertical gradient i of the trench bed at the bottom of the channel is 0.15, and the discharge flow rate of debris flow is 278m 3 / s, bulk density 16kN / m 3 , in order to control the strong abrasion and erosion of debris flow, a steel cable net bottom protection type debris flow drainage channel is used. The steel cable net bottom protection type debris flow drainage trough includes the transverse penetrating rib sill 1 at the bottom of the trough arranged at a certain distance and the side walls 2 of the drainage trough on both sides, and steel cables are arranged between the adjacent upstream and downstream rib sills 1 Net 3 bottom protection, the steel cab...

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Abstract

The invention discloses a wire mesh bottom protection type debris flow drain and guide ditch applicable to debris flow gullies with very large longitudinal gradient, and application and construction methods thereof. The drain and guide ditch comprises a plurality of bottom transverse through ribs arranged at certain intervals and ditch sidewalls on two sides. A wire mesh bottom protection is arranged between each adjacent two of upstream and downstream ribs. Stone blocks are laid above a wire mesh. The top for laying the stone blocks is level with the top of the downstream ribs. Compared to the prior art, the drain and guide ditch and the application and construction methods thereof have the advantages that kinetic energy of part of debris flow is consumed by interaction between the stone blocks filling the adjacent ribs and the debris flow, the speed of the debris flow is controlled, scouring of the bottom of the drain and guide ditch by the debris flow is controlled by the using the wire mesh to decrease exchange between the debris flow and ditch-bottom foundation earth, normal drainage and guiding functions are given to play, and late maintenance cost is reduced.

Description

technical field [0001] The invention relates to a mud-rock flow prevention technology, in particular to a steel cable net bottom-protecting mud-rock flow drainage channel and a construction method thereof which are suitable for a mud-rock flow ditch with a large ditch bed longitudinal gradient. 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 deb...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B5/00
Inventor 陈晓清游勇赵万玉陈剑刚王涛李德基
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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