Cobweb-shaped combined sand barrier with functions of preventing sand gathering and sand burying

A sand barrier and sand burial technology, applied in soil protection, construction, infrastructure engineering and other directions, can solve the problems of lack of dredging and diversion, increased cost of grass grids, huge total investment, etc., saving laying materials, reducing The effect of collecting and burying sand and reducing the area

Active Publication Date: 2021-01-29
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First, with the increase of raw material straw (mainly wheat straw and rice straw) purchase and transportation costs and labor costs, the cost of laying grass grids is also increasing year by year; second, the grids only block and fix the wind and sand flow, There is no dredging and shunting effect, resulting in serious sand burial and sand collection in the continuous sand transport area; third, wheat straw or rice straw is basically completely differentiated in 3 to 4 years under general climate conditions, so repeated binding is required
In some areas with harsh climate conditions in our country, it has been tied more than 60 times since liberation, and the total investment is very huge.

Method used

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  • Cobweb-shaped combined sand barrier with functions of preventing sand gathering and sand burying
  • Cobweb-shaped combined sand barrier with functions of preventing sand gathering and sand burying

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] In low (dune height less than 5 m) and relatively flat quicksand areas (slope ≤ 30°), use straw (wheat straw, rice straw, sunflower stalks, sorghum stalks, corn stalks or branches) as raw materials to roll "spider web"-shaped combinations Sand barriers, combined sand barriers are composed of arc net sand barriers and linear sand barriers, arc net sand barriers are composed of multi-layer arc nets, and each layer of arc nets is composed of several elliptical arc sand barrier connections. According to the topography and quicksand area, roll the elliptical arc sand barrier. When the rolling is completed, the column spacing of the elliptical arc sand barriers arranged in parallel outwards along the top of the dune is 2 m, the row spacing of each layer of elliptical arc sand barriers is 1 m, and the distance between two adjacent linear sand barriers on the windward slope includes 3 ~4 elliptical arc sand barriers, including 2~3 elliptical arc sand barriers between two adjace...

Embodiment 2

[0024] The slope of the sand dunes is ≤30°, and the "spider web"-shaped combined sand barrier is rolled with wheat straw or straw as raw material. The "spider web" sand barrier is composed of arc net sand barriers and linear sand barriers. figure 1 . The arc radius of the semi-circular sand barrier is 1.5 m. When laying, the column spacing of the semi-circular sand barriers arranged in parallel outwards along the top of the dune is 2 m, and the row spacing of each semi-circular sand barrier connection is 1 m. Outcrop grass The height is 25 cm, the top of the semi-circular arc is facing the direction of the main sand flow, and the distance between the linear sand barriers is 1.5-2.5 m. Each layer of arc sand barriers between two adjacent linear sand barriers on the windward slope consists of 3 to 4 semicircular sand barriers, and each layer of arc sand barriers between two adjacent linear sand barriers on the upwind slope consists of 2 to 3 All of them are composed of semi-ci...

Embodiment 3

[0027] Sand dune slopes meet the requirements of 30°figure 1 . The arc radius of the semi-circular sand barrier is 1.2 m. When laying, the column spacing of the semi-circular sand barriers arranged parallel to the outside along the top of the dune is 1.5 m, and the row spacing of each layer of semi-circular sand barriers is 1 m. The height is 25 cm, the top of the arc is directly opposite to the direction of the main sand flow, and the distance between the linear sand barriers is 1.5-2.5 m. Each layer of arc network between two adjacent linear sand barriers on the windward slope is composed of 5 to 7 semicircular sand barriers, and each layer of arc network sand barriers between two adjacent linear sand barriers on the upwind slope is composed of 3 to 4 semicircular sand barriers. Composed of arc sand barriers.

[0028] When gravel, cobblestone, gravel or soil are used as raw materials, first pile sand to form a semicircular and linear sand barrier with a height of 25 cm, and...

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Abstract

The invention discloses a cobweb-shaped combined sand barrier with functions of preventing sand gathering and sand burying. The whole sand barrier is in a cobweb shape and is formed by connecting an arc net sand barrier and a linear sand barrier; the arc net sand barrier is composed of multiple layers of arc nets; each layer of arc net is formed by connecting a plurality of elliptic arc or semicircular arc sand barriers; and the elliptic arc or semicircular sand barriers extend outwards from the top of dunes and are arranged in parallel. Compared with common grass squares, the auxiliary psammophyte planting survival rate is similar, but 20% of laying materials can be saved, and the cost is greatly reduced; and the cobweb-shaped combined sand barrier has the functions of dredging, shunting,slowing down, blocking and fixing quicksand, sand gathering and sand burying can be reduced, and compared with the common grass squares, the cobweb-shaped combined sand barrier can reduce the sand gathering and sand burying area by 30%.

Description

technical field [0001] The invention relates to a "spider web"-shaped combined sand barrier, in particular to a "spider web"-shaped combined sand barrier with functions of preventing sand collection and sand burial, and belongs to the technical field of water and soil conservation. Background technique [0002] Desertification is a major environmental problem facing the world today. More than 110 countries around the world are affected by land desertification, and the annual economic loss reaches 42 billion US dollars. my country is one of the countries with the most serious land desertification in the world. According to the fifth "China Desertification and Sandification Status Bulletin" published by the State Forestry Administration in 2015, as of 2014, the desertified land area in my country was 261.16×104 km 2 , accounting for 27.20% of the total land area. Desertified land is mainly distributed in Xinjiang, Inner Mongolia, Tibet, Qinghai and Gansu. Desertification not...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/00
CPCE02D3/005E02D2300/0045
Inventor 雷自强熊红冉叶喜娥王娜杨凤红孔妍蓉康玉茂杨尧霞米亚军
Owner NORTHWEST NORMAL UNIVERSITY
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