Method for protecting dam body and dam foundation of sand blocking dam

A technology for sand control dams and dam bodies, which is applied in the direction of coastline protection, sea area engineering, instruments, etc., and can solve problems such as low protection effect, collapse of sand control dams, and decreased stability of sand control dams

Active Publication Date: 2020-12-22
INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
View PDF6 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the scour depth increases, the stability of the dam body will gradually decrease, and even lead to the collapse of the dam, seriously affecting the disaster prevention function of the dam
[0004] How to reduce the erosion of the dam body caused by the long flowing water in the ditch, and the erosion of the dam foundation by the water tongue after passing through the dam have become important issues affecting the stability of the dam body. Field investigations have found that the effect of reducing the erosion behind the dam through the steel gabion behind the dam is not good. And as time increases and decreases, its protective effect becomes less and less

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for protecting dam body and dam foundation of sand blocking dam
  • Method for protecting dam body and dam foundation of sand blocking dam
  • Method for protecting dam body and dam foundation of sand blocking dam

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0158] There is a long-flowing gully in a debris flow channel, and a small sand dam in the ditch is selected for the configuration of ecological geotechnical measures. According to remote sensing images and field surveys, the width of the gully in front of the dam is l=4m, and the maximum flow in the gully is for Q max =2.4m 3 / s, the flow velocity is v=3m / s, the channel slope J=6°, the width of the overflow outlet of the sand check dam is B=10m, the distance between the main dam and the auxiliary dam is 6m, and the height of the sill behind the overflow outlet is 4m. And the sand control dam is full. Calculate the average water depth in the gully according to the flow formula: Q max =S·v=h·l·v, h=0.2m. According to the water depth, select the herbaceous bermudagrass. The height of the bermudagrass is about 0.3m, and the rooting depth is 0.1-0.2m. Therefore, the area 7m long and 6m wide in front of the main dam is cleared to the overflow, and 0.2m of soil is replaced. Vege...

Embodiment 2

[0162] There is a long-flowing gully in a debris flow channel, and a Gufang dam in the channel is selected to configure ecological geotechnical measures. According to remote sensing images and field surveys, it is obtained that the width of the gully in front of the dam is l=3m, and the maximum flow in the gully is Q max =1.8m 3 / s, the flow velocity is v=2m / s, the channel slope J=5°, the width of the overflow outlet of the sand check dam is B=4m, the distance between the main dam and the auxiliary dam is 6m, and the height of the sill behind the overflow outlet is 3m. And the Gufang Dam is already full. Calculate the average water depth in the gully according to the flow formula: Q max =S·v=h·l·v, h=0.3m. According to the water depth, the herbaceous vegetation Corydalis is selected. The height of Corydalis is about 0.5m, and the rooting depth is 0.1-0.3m. Therefore, the area 7m long and 4m wide in front of the main dam is cleared to the overflow, and 0.3m of soil is replac...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

Provided is a method for protecting a dam body and a dam foundation of a sand blocking dam. The method comprises: processing the front portion and the rear portion of a main dam and the front portionand the rear portion of an auxiliary dam into planes, and laying soil; planting herbaceous plants on the upstream of the main dam and the upstream of the auxiliary dam so as to retain silt, slow downflow speed and disperse water flow; planting shrubs below the main dam and the auxiliary dam, so that the flowing speed and splashing erosion of flowing water are reduced through the shrubs; and planting moss on the dam body so as to reduce adherent flow erosion. The ecological vegetation is used for gradient energy dissipation, and damage of upstream long flowing water to the sand blocking dam can be effectively reduced for a long time. Compared with existing engineering measures such as a steel bar gabion, the protection effect of the method is increased along with the increase of time, themethod is low in cost and environmentally friendly, ecological restoration in the debris flow channel can be accelerated through soil deposition around the herbaceous plants, and sustainable development of channel ecology is facilitated.

Description

technical field [0001] The invention relates to a technology for reducing the erosion of the dam body and foundation of a debris flow sand-holding dam, in particular to a method for protecting the dam body and foundation of the sand-holding dam. Background technique [0002] Debris flow is a common natural disaster in mountainous areas. There are more than 100,000 debris flow ditches distributed in the vast land of our country, threatening the life and property safety of the Chinese people, and restricting the economic development and resource development and utilization of mountainous areas. Since the 1950s, China has carried out research on the mechanism of debris flow prevention and carried out engineering practice. So far, a large number of debris flow prevention and control projects have been completed, protecting the safety of people's lives and property, and ensuring the development of mountainous areas. Prevention and control engineering mainly includes geotechnical ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/13G06F30/28G06K9/00E02B7/02
CPCG06F30/13G06F30/28E02B7/02G06V20/13Y02A10/11
Inventor 崔文榕陈晓清陈剑刚赵万玉
Owner INST OF MOUNTAIN HAZARDS & ENVIRONMENT CHINESE ACADEMY OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap