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Stability calculation method and application of solid sand check dam for viscous debris flow

A technology for sand dams and debris flow, applied in dams, dikes, buildings, etc., can solve the problems of not being able to truly reflect the dynamic process of sand dams intercepting debris flow, conservative design, and increased project costs

Active Publication Date: 2018-12-18
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, the above method may make the design more conservative, increase the project cost, and cannot truly reflect the dynamic process of the debris flow intercepted by the sand check dam

Method used

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  • Stability calculation method and application of solid sand check dam for viscous debris flow
  • Stability calculation method and application of solid sand check dam for viscous debris flow
  • Stability calculation method and application of solid sand check dam for viscous debris flow

Examples

Experimental program
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Effect test

Embodiment 1

[0090] Such as Figure 1 ~ Figure 2 A. figure 2 Shown in B, measure and calculate the dynamic stability of the proposed solid sand retaining dam of a certain debris flow ditch in Wudu area, Gansu with the inventive method.

[0091] A debris flow ditch is located on the left bank of the Bailong River in Wudu District, Gansu. Due to frequent human economic activities in recent years, the debris flow tends to be active. The drainage area of ​​the ditch is about 12.4km 2 , the length of the main ditch is about 7.84km, the relative height difference of the watershed is about 1960m, and the average longitudinal gradient of the main ditch is 250‰. The dangerous area of ​​the debris flow ditch is mainly distributed in the submerged or silted areas of the debris flow ditch mouth and the upper and lower reaches of the main river due to river blockage.

[0092] In order to effectively control the debris flow, prevent the debris flow from blocking the river, intercept the debris flow ...

Embodiment 2

[0099] Such as Figure 3 ~ Figure 4 A. Figure 4 Shown in B, use the inventive method to check and calculate the stability of the built solid sand retaining dam of a certain debris flow ditch in Sichuan.

[0100] The debris flow ditch is located on the left bank of a river in Mianzhu City, Sichuan Province. It is a frequent but small-scale debris flow ditch in the southern section of a certain highway traffic trunk line. The drainage area of ​​the ditch is 7.81km 2 , the total length of the main ditch is about 3.25km, the relative height difference of the watershed is about 812m, and the average longitudinal gradient of the ditch bed is 250‰. Debris flows broke out in the ditch, causing serious economic losses and casualties, threatening highway piers. In order to ensure the normal operation of highway traffic and the safety of life and property of local residents, a series of prevention and control projects have been built on the debris flow ditch. The calculation target ...

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Abstract

The invention discloses a stability measurement and calculation method for a viscous debris flow entity silt arrester, and aiming at avoiding the defect that a conventional measurement and calculation method only draws the most extreme situations into consideration and cannot demonstrate the dynamic change process of the stability of the silt arrester in the debris flow process, provides the stability measurement and calculation method which can reflect the dynamic change process of the stability of the silt arrester in the process that the entity silt arrester intercepts debris flow. The stability measurement and calculation method comprises the following steps: firstly, investigating and determining that the entity silt arrester belongs to an empty reservoir overflowing working condition or a half reservoir overflowing working condition; determining engineering parameters through field investigation, indoor soil tests and silt arrester design projects; and measuring and calculating the stability of the silt arrester by use of calculation methods of anti-slip stability parameters Kc(n-1) and stability against overturning parameters Ky(n-1) under different working conditions. The stability measurement and calculation method can be used for particularly measuring and calculating the stability of the silt arrester in the full reservoir overflowing state, can provide scientific basis and references for parameter optimal design, structural safety checkup and the like of debris flow control projects, avoids waste of the construction cost, is closer to the project reality and conforms to the requirements of actual engineering.

Description

technical field [0001] The invention relates to a method for measuring and calculating the stability of a sand dam and an application thereof, in particular to a method for measuring and calculating the stability of a viscous debris flow solid sand dam and an application thereof, belonging to the fields of engineering measurement and mountain disaster prevention and control. Background technique [0002] The sand check dam is a kind of artificial structure built in the debris flow ditch across the ditch bed. It has the characteristics of simple engineering structure, good control effect, local materials, convenient construction and maintenance, long service life and low cost. The physical sand check dam not only has a good retention effect, but also reduces the power of debris flow, raises the erosion surface, and increases the stability of the ditch bed. It is one of the most widely used engineering measures in the control of debris flow disasters, especially in towns, mines...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B1/00E02B3/10
CPCE02B1/00E02B3/10
Inventor 柳金峰孙昊游勇林雪平杨东旭
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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