A sandbag grid sand barrier and its construction method

Abstract

A construction method for a sandbag grid sand barrier, comprising: selecting a non-woven fabric material with a certain strength to make sandbags; on-site construction in the area where the grid sand barrier is to be set up, digging local natural accumulated sand to fill the sandbags and then tying the mouths of the sandbags; soaking the sandbags in cement slurry to wrap the slurry, so that the cement slurry fully infiltrates the sandbags and penetrates into the bags to a certain depth, and condenses with the sand grains in the bags to form a whole; after the sandbags are wrapped with slurry, rolling them on the sand surface to make the surfaces of the sandbags covered with natural gravel; stacking the sandbags into grids as required. The present invention uses local accumulated sand to fill the sandbags to make the sand barrier; the sandbags are wrapped with sand by hanging slurry with non-woven fabric, achieving the purpose of improving durability at low cost.

Description

Technical Field

[0001] The present invention relates to a new type of sand barrier and its construction method, in particular to a new type of sandbag grid sand barrier and its construction method. Background Art

[0002] Grid sand barriers are currently commonly used sand fixation measures, which can effectively fix the underlying sand dunes, intercept the movement of near-surface windblown sand, and protect adjacent facilities from being buried by windblown sand.

[0003] In the prior art, conventional straw grid sand barriers are usually used. Such straw grid sand barriers are formed by laying bundles of waste wheat straw in a grid pattern on the sand, then rolling them into the sand with a shovel, leaving 1 / 3 or half of the wheat straw standing upright on the four sides naturally, and then spreading the sand in the center of the grid around the roots of the wheat straw on the four sides, so that the wheat straw stands firmly on the sandy ground. The advantages are extremely low cost and convenient construction. The disadvantages are poor durability of the straw grid and short protection life. In windy sand areas, the wind is often strong. Once a local area of a large area of straw grid gaps is blown out, forming wind erosion troughs and wind erosion holes, the connected sand barriers will be continuously eroded, resulting in a gradually increasing damaged area of the sand barriers.

[0004] In addition, in the prior art, PE net grid sand barriers are also used. Such a structure is made of PE net materials to form a grid sand barrier. The advantages are that PE net geotechnical materials have little pollution, are aging-resistant, have low cost, and are convenient for construction. The disadvantages are that in windy sand areas, the wind is often strong, the temperature is high, and the sunlight is strong. The thin and fragile PE net is quickly torn and fails under harsh environments and strong wind forces, resulting in a greatly shortened protection life. If the thickness of the PE net is increased to increase the strength, the cost will increase sharply.

[0005] In summary, the grid sand barrier settings adopted in the above prior art cannot completely prevent the migration of windblown sand. After the sand barriers fail, a large amount of windblown sand accumulates, making it difficult to clear. Summary of the Invention

[0006] In order to solve the defects existing in the prior art, the present invention discloses a new type of sandbag, and its technical solution is as follows:

[0007] A new type of sandbag, characterized in that: it includes three layers. The first layer is an outer layer of sand grains, the second layer is a hard shell layer formed by the condensation of non-woven fabric material and cement, and the third layer is a hard shell layer formed by the penetration of cement slurry into the sand grains inside the bag.

[0008] Based on the above new type of sandbag, the present invention discloses a construction method for a sandbag grid sand barrier. The sandbag structure adopts the above new type of sandbag, and is characterized in that:

[0009] Step 1: Select non-woven fabric materials with a certain strength and make them into sandbags;

[0010] Step 2: At the area where the grid sand barrier is to be set, carry out on-site construction, dig the local natural accumulated sand, fill the sandbags, and then tie the mouths of the sandbags.

[0011] Step 3: Immerse the sandbag in the cement slurry to wrap it with slurry, so that the cement slurry fully infiltrates the sandbag and penetrates into the bag to a certain depth, and coagulates with the sand grains in the bag to form a whole;

[0012] Step 4: After the sandbag is wrapped with slurry, roll it on the sandy land surface so that the surface of the sandbag is covered with natural gravel;

[0013] Step 5: Stack the sandbags into squares as required.

[0014] The present invention also discloses a sandbag square sand barrier, which is characterized in that: the above-mentioned construction method of the sandbag square sand barrier is adopted.

[0015] The present invention also discloses another sandbag square sand barrier, which is characterized in that: the above-mentioned new sandbags are used to construct multiple square sand barrier structures in the sandy and windy areas. Beneficial effects

[0016] Use the local accumulated sand to fill the sandbags to make sand barriers; the sandbags are wrapped with sand by hanging slurry with non-woven fabric, so as to achieve the purpose of low cost and improved durability. Brief description of the drawings

[0017] Figure 1 It is the on-site structure diagram of the straw checkerboard sand barrier;

[0018] Figure 2 It is the on-site structure diagram of the PE net square sand barrier;

[0019] Figure 3 It is the schematic diagram of the existing geotextile;

[0020] Figure 4 It is the schematic diagram of the sandbag made of geotextile;

[0021] Figure 5 It is the effect diagram after the geotextile sandbag is filled with sand and hung with slurry;

[0022] Figure 6 It is the effect diagram of the slurry penetration after the sandbag is cut open for inspection;

[0023] Figure 7 It is the schematic diagram of the geotextile sandbags stacked into a square sand barrier, where the lower left corner is the sand-wrapped state after hanging slurry, and the lower right corner is the non-sand-wrapped state after hanging slurry. Detailed implementation manners

[0024] Geotextile, also known as geotextile fabric, is a permeable geosynthetic material made of synthetic fibers through needle punching or weaving. Geotextile is one of the new geosynthetic materials, and the finished product is in the form of a fabric. Geotextiles are divided into woven geotextiles and non-woven filament geotextiles. A sand barrier, also known as a mechanical sand barrier or windbreak, is a barrier made of materials such as firewood, straw, clay, branches, slats, and pebbles on the sand surface. It is an effective engineering sand fixation measure to reduce wind speed and fix the sand surface. Its main function is to fix mobile sand dunes and semi-mobile sand dunes.

[0025] See the appendix Figure 1-7 As described. In the present invention, sandbags are made of non-woven fabric. After filling with sand, they are soaked in cement slurry for 10 s to allow the cement slurry to fully penetrate the sandbags. Then, they are rolled on the sand to evenly cover the surface with sand grains. After soaking, they are arranged in a grid pattern. After one day, the cement slurry hardens. A total of three layers of protection are formed. The first layer is the outer layer of sand grains, the second layer is the hard shell layer formed by the non-woven fabric material and the cement coagulation, and the third layer is the hard shell layer formed by the cement slurry penetrating into the sand grains inside the bag. The three-layer protection greatly extends the service life of the sand barrier at a relatively low cost.

[0026] The present invention discloses a construction method for a sandbag grid sand barrier, which includes the following steps:

[0027] (1) Select a non-woven material with a certain strength. For example, non-woven geotextile. Non-woven materials such as geotextiles have a very low cost on the one hand, and can absorb and penetrate cement slurry well on the other hand. After the cement slurry coagulates, it can form an integral with the geotextile material, having a certain strength and durability.

[0028] (2) Make the non-woven material into a cylindrical sandbag. It is recommended that the sandbag be 0.7 m long and 0.3 m in inner diameter. A sandbag of this size can be just lifted and operated by an adult male after being filled with sand.

[0029] (3) At the area where the grid sand barrier needs to be set up, carry out on-site construction, use local materials, dig the local natural accumulated sand, fill the sandbag, and then tie the mouth of the sandbag to prevent sand leakage.

[0030] (4) Soak and coat the sandbag in the cement slurry to allow the cement slurry to fully wet the sandbag and slightly penetrate into the bag to a certain depth. It is recommended that the soaking time be 10 s. After the cement slurry penetrates into the bag to a certain depth, it can coagulate with the sand grains in the bag to form an integral. After the bag body weathers and fails in the future, it can still maintain a certain strength and durability, improving the overall service life of the sand barrier.

[0031] (5) After the sandbag is coated with slurry, roll it on the sand surface so that the surface of the sandbag is covered with natural sand and gravel. The natural sand and gravel adhere to the outside of the sandbag in this way, which can increase the thickness of the outer protection layer of the sandbag and extend the service life of the sandbag at a very low cost.

[0032] (6) Then stack the sandbags into squares as required. It is recommended that the inner frame size of the square be 1m * 1m, which has the best comprehensive sand prevention effect.

[0033] The present invention uses sandbags to make square sand barriers, makes full use of the local accumulated sand, and solves the problem of sand removal and transportation; uses the existing non-woven fabric to make sandbags, and through slurry hanging, the cement slurry and the non-woven fabric are condensed into a whole, with low cost, longer service life than single non-woven fabric or cement, and more durable than conventional straw checkerboards and PE net checkerboards; after slurry hanging, roll it on the sand to evenly wrap it with gravel, which can form a gravel protection layer on the outside of the sandbag at extremely low cost and extend the service life of the sandbag.

[0034] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification is only the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection required by the present invention is defined by the appended claims and their equivalents.

Claims

1. A sandbag, characterized by: It includes three layers, the first layer is the outer layer of sand, the second layer is the hard shell layer formed by the non-woven fabric material and cement, and the third layer is the hard shell layer formed by the cement slurry penetrating into the sand in the bag; Wherein, the non-woven fabric material is a non-woven geotextile, the tensile strength of which is not less than 10 kN / m, and has anti-ultraviolet aging performance; The penetration depth of the cement slurry is 5-10 cm, and it condenses with the sand in the bag to form an overall hard shell layer; The outer layer of sand is formed by rolling and adhering to natural gravel, the gravel particle size is 0.5-2mm, and the covering thickness is 2-5mm; The overall structure of the sandbag forms multiple layers of protection inside and outside through the penetration and coagulation of cement slurry.

2. A sandbag grid sand barrier construction method, wherein the sandbag structure is the sandbag according to claim 1, characterized in that: Step 1: Select non-woven geotextile material with a tensile strength of not less than 10kN / m and make it into a cylindrical sandbag with a length of 0.7m and an inner diameter of 0.3m; Step 2: In the area where the square sand barrier is to be set up, carry out on-site construction, dig up local natural sand, fill the sandbags and tie them up; Step 3: Soak the sandbag in cement slurry for 10 seconds, so that the cement slurry fully soaks the sandbag and penetrates to a depth of 5-10 cm in the bag, and condenses with the sand in the bag to form an overall hard shell layer; Step 4: After the sandbags are coated with slurry, they are rolled on the sand surface to make the surface of the sandbags evenly covered with natural gravel with a particle size of 0.5-2mm to form an outer layer of protection; Step 5: Stack the sandbags in a 1m×1m grid to form a grid-like sand barrier.

3. The sandbag grid sand barrier construction method according to claim 2 is characterized by: The water-cement ratio of the cement slurry is 0.4-0.6, and an anti-ultraviolet aging agent is added to improve the durability of the cement hard shell layer.

4. The sandbag grid sand barrier construction method according to claim 2 is characterized by: After the sandbags are rolled and adhered to the gravel, the gravel covering thickness on the surface is 2-5 mm, and the gravel and cement slurry form a bonding layer.

5. The sandbag grid sand barrier construction method according to claim 2 is characterized by: The main belt of the square sand barrier is perpendicular to the main wind direction, the secondary belt is perpendicular to the main belt, and the spacing between the main belt and the secondary belt is 1m, forming a 1m×1m grid structure.

6. A sandbag grid sand barrier, characterized by: By using the sandbag grid sand barrier construction method described in any one of claims 2-5, a plurality of 1m×1m grid sand barrier structures are formed in sandy areas.

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