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Debris flow silt arrester apron design method and application

A design method and sand control dam technology, applied in design optimization/simulation, computer-aided design, special data processing applications, etc., can solve problems such as increasing engineering costs, and achieve easy access, scientific and simple calculation process, and accuracy of calculation results high effect

Active Publication Date: 2021-08-13
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 actual engineering design, the apron design of the sand check dam under the guidance of this method tends to be biased towards a conservative value within a large value range, thereby increasing unnecessary engineering costs

Method used

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  • Debris flow silt arrester apron design method and application
  • Debris flow silt arrester apron design method and application
  • Debris flow silt arrester apron design method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0053] The method of the invention is used to complete the apron design of a proposed debris flow sand retaining dam.

[0054] A debris flow ditch is located in Jiuzhaigou Scenic Area, Aba Tibetan and Qiang Autonomous Prefecture, Sichuan Province, and the scenic road passes through the mouth of the ditch. The overall shape of the ditch is leaf-shaped, and the drainage area of ​​the ditch is 1.96km 2 , the main ditch is 2.57km long, and it is a seasonal flow channel; the altitude is 2470m-4040m, and the relative height difference is about 1570 meters. Small-scale mudslides have occurred many times in the ditch in history, and large-scale mudslides have occurred in recent years. A large amount of solid matter rushed to the scenic road. Although no casualties were caused, the landscape ecology and infrastructure of the scenic spot were damaged. At the same time, it seriously threatened tourists. personal safety.

[0055] In order to ensure the normal operation of scenic highway...

Embodiment 2

[0066] The method of the invention is used to complete the apron design of a proposed debris flow sand retaining dam.

[0067] A debris flow ditch is located on the left bank of a tributary of the Minjiang River in Sichuan. It is a rainstorm-induced debris flow ditch with frequent activities in the region. The Wenchuan earthquake caused a large number of adverse geological phenomena of landslides, and debris flow disasters broke out in the ditch many times. The drainage area of ​​the ditch is about 10.7km 2 , the length of the main ditch is about 6.12km, and the average longitudinal gradient of the main ditch is 266‰. Due to the frequent occurrence of mudslides after the earthquake, the ditch seriously threatened the personal safety of residents in the quake area and infrastructure such as highway traffic arteries, and caused a certain degree of blockage to the Minjiang River, affecting the flooding of the Minjiang River. The blocked river backwater may also threaten the safet...

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Abstract

The invention discloses a design method and application of a debris flow silt arrester apron. The apron design method comprises the steps: carrying out the energy balance and motion characteristic analysis of two stages of a debris flow body dam-crossing overflowing process, and introducing a debris flow velocity coefficient function established through early-stage experimental research; perfecting functions of key variables of the two stages, and establishing a debris flow silt arrester apron design method which directly considers debris flow silt arrester structure characteristics, silt arrester in-reservoir back-silting accumulation body characteristics, debris flow property characteristics and channel topographic characteristics. According to the method, the minimum apron length value can be directly measured and calculated through scientific calculation based on field survey data. The method is reliable in principle and high in result precision, and can overcome the defects that in the prior art, the longitudinal ratio drop value is deviated to be conservative in actual engineering design due to high empirical performance and large value range change, and then unnecessary engineering cost is increased. The method can also be applied to stability evaluation of debris flow silt arrester engineering and design of the minimum distance between a silt arrester body and an auxiliary dam.

Description

technical field [0001] The invention relates to an engineering design method of a debris flow sand retaining dam, in particular to a design method for measuring and calculating the debris flow sand retaining dam apron, and the application of the method in the design and evaluation of engineering measures for the prevention and control of debris flow disasters, which belongs to the engineering technology of debris flow disaster prevention and control field. Background technique [0002] Sand control dam Debris flow sand control dam is a kind of artificial structure built in the debris flow channel across the ditch bed. On the one hand, the debris flow retaining dam has the characteristics of simple engineering structure, fast prevention and control effect, local materials, convenient construction and maintenance, long service life, and low cost. The scale of debris flow, and the role of stabilizing gully slopes, controlling channel erosion, and inhibiting the development of ...

Claims

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Application Information

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IPC IPC(8): G06F30/13G06F30/28G06F113/08G06F119/14
CPCG06F30/13G06F30/28G06F2113/08G06F2119/14
Inventor 孙昊游勇柳金峰芦明赵万玉
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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