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A rib sill design method for a soft foundation energy dissipation type debris flow drainage channel

A design method and technology for debris flow, applied in the field of construction engineering design and debris flow prevention and control engineering, can solve the problems of high damage rate of rib sill, affecting the normal operation of drainage channel, damage of rib sill, etc., to enhance bearing capacity and wear resistance. , Simple and effective rib sill optimization method, the effect of optimizing the support system and internal force

Active Publication Date: 2020-03-17
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the rib sills of the energy-dissipating debris flow drainage channel on soft foundations are all straight ribs that run through the bottom of the drainage channel horizontally. One of the main problems it faces is the high damage rate of the rib sill, which affects the normal operation of the drainage channel.
On the one hand, during the operation of the traditional straight rib sill, the foundation at the back of the rib sill is easily eroded by erosion, causing the soil support behind the rib sill to fail, resulting in damage to the rib sill; on the other hand, during the operation of the traditional straight rib sill , when the debris flow impact load increases, the bending moment and tensile cracks inside the rib sill increase sharply, resulting in rib sill damage

Method used

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  • A rib sill design method for a soft foundation energy dissipation type debris flow drainage channel
  • A rib sill design method for a soft foundation energy dissipation type debris flow drainage channel
  • A rib sill design method for a soft foundation energy dissipation type debris flow drainage channel

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Embodiment 1

[0040] Such as figure 1 , figure 2 , image 3shown. Several dilute debris flows broke out in a certain debris flow ditch, seriously affecting the lives and property safety of local people. In order to alleviate the debris flow disaster, it is planned to build a soft foundation energy-dissipating drainage channel on the accumulation fan of the watershed to guide the debris flow erupting in the watershed. The soft foundation energy-dissipating debris flow drainage trough includes a number of rib sills 1 arranged at certain intervals and side walls 2 on both sides. The foundation of the wall 2 or the foundation of the side wall 2 are integrated, and the steps of the design method of the arched rib sill 1 of the soft foundation energy dissipation type debris flow drainage channel are as follows:

[0041] The first step is to determine the vertical slope gradient i of the natural ditch bed through on-site investigation c is 12%; according to the type of debris flow, the slope...

Embodiment 2

[0047] Such as figure 1 , figure 2 , image 3 shown. Water and rock flows broke out in a certain mudslide ditch many times, seriously affecting the lives and property safety of local people. In order to alleviate the debris flow disaster, it is planned to build a soft foundation energy-dissipating drainage channel on the accumulation fan of the watershed to guide the debris flow erupting in the watershed. The soft foundation energy-dissipating debris flow drainage trough includes a number of rib sills 1 arranged at certain intervals and side walls 2 on both sides. The foundation of the wall 2 or the foundation of the side wall 2 are integrated, and the steps of the design method of the arched rib sill 1 of the soft foundation energy dissipation type debris flow drainage channel are as follows:

[0048] The first step is to determine the vertical slope gradient i of the natural ditch bed through on-site investigation c is 7%; according to the type of debris flow, the slop...

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Abstract

The invention discloses a rib threshold design method of a soft-foundation energy-dissipation debris flow drainage groove. The drainage groove comprises a plurality of rib thresholds arranged according to a certain distance, and side walls on two sides; the rib thresholds are in arched shapes along the negative direction of a debris flow movement direction; and arch supports are inserted into foundations of the side walls or are connected with the foundations of the side walls into a whole. The arched-shaped rib threshold design method comprises the steps of firstly determining the semi-arch width of each arched-shaped rib threshold according to the designed width of the drainage groove; then determining a load characteristic coefficient according to a soil pressure load and a debris flowimpact load borne by each rib threshold; then determining the characteristic length of a side support according to the maximum horizontal support force of each side wall foundation on the corresponding arch support; and finally determining an optimal arch axis equation. According to the method, each rib threshold is designed to be in the arched shape, and meanwhile, the optimal arch axis equationof each arched-shaped rib threshold is designed, so that the problem that the rib thresholds are damaged due to the failure of a soil boy support after the rib thresholds and the increased load beforethe rib thresholds can be effectively solved, and a simple, convenient and effective rib threshold optimization method is provided for areas and working conditions with higher damage rate of traditional straight rib thresholds.

Description

technical field [0001] The invention relates to a method for designing ribs and sills of a soft foundation energy dissipation type debris flow drainage channel, and belongs to the fields of debris flow prevention and control engineering and construction engineering design. Background technique [0002] Torrents and debris flow disasters are one of the main types of geological disasters in my country. With the economic development of mountainous areas, the demand for mountain torrent and debris flow prevention and control projects is becoming more and more vigorous. Soft ground energy dissipation debris flow drainage channels are widely used in debris flow control. [0003] At present, the rib sills of the energy-dissipating debris flow drainage channel on soft foundations are all straight ribs that run through the bottom of the drainage channel horizontally. One of the main problems it faces is the high damage rate of the rib sill, which affects the normal operation of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B5/00E02B5/08
CPCE02B5/00E02B5/08
Inventor 陈剑刚王喜安陈晓清赵万玉陈华勇唐金波
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI