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Ultra-large-scale flood mud-rock flow prevention and control method

A super-large-scale, debris flow technology, applied in dams, sheet pile walls, buildings, etc., can solve the problems that the prevention and control of watershed methods are difficult to achieve the effect of prevention and control, and achieve the effect of reducing threats and harm

Active Publication Date: 2020-09-01
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For a total amount greater than 100×10 4 m 3 , or the peak flow is greater than 2000m 3 / s ultra-large-scale floods and mudslides, the conventional prevention and control engineering watershed methods are difficult to achieve effective prevention and control effect

Method used

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  • Ultra-large-scale flood mud-rock flow prevention and control method
  • Ultra-large-scale flood mud-rock flow prevention and control method

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Such as figure 1 Shown. In a glacier-type debris flow valley, the channel is rich in loose solids, narrow channel, large longitudinal slope of the channel bed, and temperature rise has led to violent glacier melting. Recently, debris flow disasters have occurred frequently. Debris flows often silt and block the ditch highway and block the river to form a barrier lake, seriously threatening the safety of passing vehicles and upstream and downstream towns. According to the historical disaster survey visits in the basin and the calculation results of mud marks in the channel, the valley has experienced a 50-year debris flow disaster. This debris flow ditch highway is an important transportation hub leading to the western region, and its design standard is P = 1%; and the number of people threatened by debris flow disasters is greater than 1,000. Therefore, according to the design code of debris flow prevention and control engineering, the planning and design standard for ...

Embodiment 2

[0052] Such as figure 1 Shown. In a glacier-type debris flow valley, the channel is rich in loose solids, narrow channel, large longitudinal slope of the channel bed, and temperature rise has led to violent glacier melting. Recently, debris flow disasters have occurred frequently. According to the historical disaster survey visits in the basin and the calculation results of mud marks in the channel, the valley has experienced a mudslide disaster with a scale of 100 years. The mouth of the debris flow ditch is a proposed important railway, and its design standard is P=1%; the debris flow disaster seriously threatens the safety of the railway and passengers. According to the design code of debris flow prevention and control engineering, the planning and design standard for the prevention and control engineering of the debris flow ditch is determined as P=1%. Calculated by the hydrological calculation method of the small watershed, the total amount of debris flow washed out at o...

Embodiment 3

[0056] Such as figure 1 with figure 2 Shown. In a glacial debris flow valley, the channel is narrow and the longitudinal slope of the channel bed is large. Due to the influence of historical earthquakes, the channel is rich in loose solid materials, and the temperature rise has caused the glacier to melt violently. Recently, debris flow disasters have occurred frequently. According to the historical disaster survey visits in the basin and the calculation results of mud marks in the channel, the valley has experienced a mudslide disaster with a scale of 100 years. Debris flow seriously threatens the important road leading to the western region from the ditch (the design standard is P=1%), and seriously affects the production and life of local people. Therefore, according to the design code of debris flow prevention and control engineering, the planning and design standard for the prevention and control engineering of the debris flow ditch is determined to be P=1%. Calculated...

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Abstract

The invention provides an ultra-large-scale flood mud-rock flow prevention and control method. Firstly, a scale corresponding to a certain standard flood mud-rock flow in a watershed is determined, and then the level of the flood mud-rock flow is judged; a protection design standard of a control engineering system in the watershed is determined for prevention and control of the super-large-scale flood mud-rock flow, and a design standard of the key control engineering is further determined; and finally, a sand blocking dam design method with different functional partitions is provided according to the design standard of the key control engineering. Under the condition of ensuring the safety of the whole watershed control engineering system, a critical control sand blocking dam part dam body is allowed to collapse to increase the over-flow cross section area and the lower leakage flow, the dam body base portion of a non-collapse area can effectively control channel downward cutting andregulate the flow speed through the section, and thus the threat and harm to railways, highways, bridges, tunnels and the like in the downstream area can be reduced to the maximum extent.

Description

Technical field [0001] The invention belongs to the fields of disaster prevention and mitigation, civil engineering design, as well as the application fields of railway engineering, highway engineering, etc., and particularly relates to a method for preventing and controlling super-large-scale flood cement flow. Background technique [0002] Mountain torrents and debris flow disasters are one of the main types of geological disasters faced by mountainous areas in my country, especially large-scale glacial floods and cement flows in high altitude areas, and glacial lake outburst floods and cement flows have caused more serious damage to major linear projects such as highways, railways, and oil pipelines. . In the context of global warming, the frequency of extreme meteorological rainfall and high temperature events is increasing. At the same time, with the construction of more and more major projects such as highways and railways in high-altitude areas, the standards for the const...

Claims

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Application Information

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IPC IPC(8): E02B7/04E02D27/40E02D5/22
CPCE02B7/04E02D27/40E02D5/226E02D27/16E02B3/04E02B7/02E02D2300/002E02D2300/0034
Inventor 陈剑刚陈晓清崔一飞游勇陈华勇赵万玉栗帅
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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