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Method for determining opening parameters of window dams for viscous debris flow

A technology of debris flow and debris flow ditch, which is applied in water conservancy projects, sea area engineering, coastline protection, etc., can solve the problems of not considering the interaction of permeable sand check dams and the influence of control performance of permeable sand check dams, etc. achieve the effect of reducing experiential

Active Publication Date: 2019-07-30
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

In the current code, the influence of its opening parameters on the control performance of the permeable sand check dam is not considered, nor is the mutual influence between the relevant parameters of the permeable sand check dam taken into account, and it is impossible to carry out the operation according to the special needs of the project. Design of Window Dam Opening Parameters

Method used

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  • Method for determining opening parameters of window dams for viscous debris flow
  • Method for determining opening parameters of window dams for viscous debris flow
  • Method for determining opening parameters of window dams for viscous debris flow

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Such as figure 1 As shown, the inventive method is applied to the window dam opening parameter design of a certain debris flow ditch in Mianyang City, Sichuan Province.

[0029] A debris flow ditch is located in Mianyang City, Sichuan Province, with a drainage area of ​​10.2km 2 , the length of the main ditch is about 5.1km, and the average longitudinal slope gradient of the main ditch bed is 202.15‰. Landslides and collapses are developed in the watershed, and loose solid matter is very rich. Under the excitation of rainfall factors, large-scale debris flows are easy to erupt, which seriously threatens the life and property safety of residents living in gully mouths and debris flow accumulation fans.

[0030] In order to prevent the mud-rock flow from causing harm to the life and property safety of local villagers, it is planned to carry out mud-rock flow disaster control work in the mud-rock flow ditch. Due to the large drainage area of ​​the debris flow ditch, when...

Embodiment 2

[0038] Such as figure 1 shown. The method of the invention is applied to the parameter design of the window dam opening of a certain debris flow ditch in Longnan City, Gansu Province.

[0039] A debris flow ditch is located in Longnan City, Gansu Province. It is a secondary tributary of the Bailong River, with a drainage area of ​​0.63km 2 , the length of the main ditch is about 1.6km, and the average longitudinal slope gradient of the main ditch bed is 169.04‰. Affected by man-made activities, debris flow activities in this ditch are very frequent. Due to the dense population around the debris flow, once a debris flow breaks out, it will directly threaten the 946 villagers living on the debris flow accumulation fan in this area, and the property damage will be more than 43 million yuan, which is a relatively large degree of damage.

[0040] In order to prevent the debris flow ditch from endangering life and the life and property safety of residents near the debris flow ditc...

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Abstract

The invention provides a method for determining opening parameters of window dams for a viscous debris flow. The method comprises the steps: the gully bed longitudinal river slope I at the positions where the window dams are located is determined, and the volume concentration Cv and the maximum solid particle diameter dmax of the debris flow capable of being formed in a debris flow gully are determined; according to the protection level of all the window dams in an area where the debris flow gully is located, the main control function of the window dams is analyzed to determine the priority ofthe adjusting and control functions achieved by one of the window dams; and according to the determined main control adjustment function, corresponding check is conducted, and thus the opening parameters of the window dams are obtained. The opening parameters of the window dams are designed starting from main adjusting and control effect indexes and the blocking condition of adjusting and controlling of the window dams for the viscous debris flow, combined with an indoor water tank experiment, based on the main adjusting and control indexes, namely the debris flow peak flow cutting rate and the blocking degree of openings of the window dams, of the window dams for the viscous debris flow, and starting from the results of adjusting and controlling of the window dams for the viscous debrisflow, the specific design needs of specific projects can be met, new ideas are provided for design of opening parameters of a through-type debris dam, and thus realistic value is achieved better.

Description

technical field [0001] The invention relates to the technical field of debris flow disaster prevention and control engineering, in particular to a design method for window dam opening parameters of viscous debris flow. Background technique [0002] Viscous debris flow is a common type of natural disaster in mountainous areas. Due to its characteristics of high bulk density, large flow rate, strong impact force, and severe destructiveness, it has become one of the disasters that cause major economic losses and casualties in most mountainous countries and regions. . In addition, in recent years, the construction of infrastructure has continued to expand to the western mountainous areas, and a large number of harmful viscous debris flow ditches are more likely to be formed under the action of rainfall. Therefore, the control of viscous debris flows is very urgent. [0003] As one of the main measures of debris flow prevention and control engineering, the permeable sand control...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02B1/00E02B8/06
CPCE02B1/00E02B8/06
Inventor 柳金峰周文兵游勇焦亮张文涛
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI