Artificial structure body used for scouring prevention of mud-rock flow and weir dam and application thereof

A structure and debris flow technology, applied in water conservancy projects, marine engineering, climate change adaptation, etc., can solve the problems of increasing downstream regional risks and social and economic losses, and achieve the effect of reducing the risk of dam failure, protecting safety, and saving costs.

Inactive Publication Date: 2011-05-11
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

Disposal results of several large-scale barrier lakes, such as Tangjiashan barrier lake flood discharge, Xiaogangjian barrier lake flood discharge of Mianyuan River, and Xiaojiaqiao barrier lake flood discharge of Chaping River, all show that the overflow outlet of the barrier dam is cut down too quickly to produce Exceeding the designed flood discharge will increase the risk of the downstream area and cause certain social and economic losses

Method used

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  • Artificial structure body used for scouring prevention of mud-rock flow and weir dam and application thereof
  • Artificial structure body used for scouring prevention of mud-rock flow and weir dam and application thereof
  • Artificial structure body used for scouring prevention of mud-rock flow and weir dam and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Such as figure 1 , figure 2 shown. The dam body of a dammed lake is mainly composed of gravel soil with an average particle size d 50 20cm, d 90 is 100cm, and the control flow velocity of the flood discharge of the barrier lake is 5.0m / s. In order to prevent the risk of rapid dam failure caused by flood discharge, it is planned to throw artificial structures towards the overflow section. The artificial structure includes four cylinders 1 of the same length, one end of the four cylinders 1 is concentrated and fixed at one point, and the other ends form four vertices of a regular tetrahedron in space. Column 1 is a cylindrical reinforced concrete structure, and the bulk density of the artificial structure is 27kN / m 3 . according to the formula The empirical coefficient k is taken as 5.0m 0.5 / s, starting velocity of artificial structure u c is 5.0m / s, calculated to get 0.5m; according to the formula , the stability coefficient K is 0.70, and the calculation is...

Embodiment 2

[0028] Such as image 3 , Figure 4 shown. A certain debris fluid is mainly composed of gravel soil, and its average particle size d 50 15cm, d 90 is 90cm, and the control velocity of the debris flow is 7.0m / s. In order to prevent the debris flow valley from being quickly cut down by the debris flow, it is planned to throw artificial structures into the debris flow channel. The artificial structure includes four cylinders 1 of the same length, one end of the four cylinders 1 is concentrated and fixed at one point, and the other ends form four vertices of a regular tetrahedron in space. Column 1 is a hexagonal reinforced concrete structure, and the bulk density of the artificial structure is 27kN / m 3 . according to the formula The empirical coefficient k is taken as 7.0m 0.5 / s, starting velocity of artificial structure u c is 7.0m / s, calculated to be 0.5m; according to the formula The stability factor K is 0.72, and the calculation is 1.42m; therefore, the minimum l...

Embodiment 3

[0030] Such as figure 1 , figure 2 shown. The dam body of a dammed lake is mainly composed of gravel soil with an average particle size d 50 30cm, d 90 is 120cm, and the control velocity of the flood discharge of the barrier lake is 5.0m / s. In order to prevent the risk of rapid dam failure caused by flood discharge, it is planned to throw artificial structures towards the overflow section. The artificial structure includes four cylinders 1 of the same length, one end of the four cylinders 1 is concentrated and fixed at one point, and the other ends form four vertices of a regular tetrahedron in space. Column 1 is a cylindrical reinforced concrete structure, and the bulk density of the artificial structure is 27kN / m 3 . according to the formula The empirical coefficient k is taken as 5.0m 0.5 / s, starting velocity of artificial structure uc is 5.0m / s, calculated to get 0.5m; according to the formula The stability coefficient K is 0.68, and the calculated value is 0.8...

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Abstract

The invention discloses an artificial structure body used for the scouring prevention of mud-rock flow and a weir dam and an application thereof. The artificial structure body comprises four column bodies with the same length, wherein one end of the four column bodies are fixed at a point in a concentrated way, and the other end forms four top points of a regular tetrahedron in space. The artificial structure body is placed in a ditch of mud-rock flow or an overflow port section of a weir dam in a single way or in a way of connecting in series for use. Compared with the prior art, the invention can prevent the quick downcut of the ditch of the mud-rock flow, lower the risk of dam break caused by the quick downcut of an overflow port of a weir dam body greatly, meet the requirements of thescouring prevention and the mud-rock flow discharge of the ditch of the mud-rock flow and the scouring prevention and the safe flood discharge of the overflow port of the weir dam and protect the safety of important engineering facilities and residential areas at side banks; the invention saves the manufacturing cost by more than 15% in comparison with a traditional solid regular tetrahedron structure and has convenient construction and better effect of scouring prevention.

Description

technical field [0001] The invention relates to a disaster reduction technology for disposal of mud-rock flow and dam, in particular to an artificial structure used for anti-scouring of mud-rock flow and dam and application thereof. Background technique [0002] China is one of the countries in the world where mountainous disasters frequently occur. The disasters are of various types, widely distributed and serious, which restricts the development of the national economy in the vast mountainous areas of the country and threatens the safety of people's lives and property. [0003] Debris flow disaster is one of the main types of mountain disasters. Because it has a much higher bulk density than water, its fluid structure containing a large number of rocks has special characteristics, such as high inertia, strong transport force, and huge impact force. Its harmful effects mainly include erosion, impact, abrasion, blockage, silting and so on. For the scouring effect of debris ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02B3/00
CPCY02A10/11
Inventor 陈晓清崔鹏游勇李德基赵万玉
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
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