Ecological geotextile and ecological engineering bag
Technical field
The utility model relates to a kind of ecological geotextile and ecological engineering bag.
Background technology
Along with large-scale economic construction, form a large amount of cubic metre of earth and stone slope projects, its slope protecting technique mainly still adopts the hard material bank protection, as: concrete and stone masonry bank protection etc.This class hard material, though can effectively protect the soil body to run off,, a lot of fatal shortcomings are also arranged, for example, its be far from suitable distortion of soft soil matrix is easy to generate crack and destruction.This class hard material bank protection has also destroyed view, has also destroyed ecological environment etc.
In the side slope design recently, grid-turf medium-soft bank protection is adopted in many considerations.This class slope protecting technique makes moderate progress to the compliance of its foundation deformation, and still, the mechanical property of protection side slope then greatly reduces.For the steeper soil-slope of side slope, and the river course side slope that stormy waves is arranged, this class slope protecting technique, to the protection of slope soil, then powerless.
In recent years, ecological environment severe exacerbation, environmental protection problem be subjected to more attention.Therefore, many soft slop protection materials are developed, and " the ecological bag of synthetic fibers geotechnique " slope protecting technique is wherein arranged, and have obtained exploitation." the ecological bag of synthetic fibers geotechnique " is the pocket made from the synthetic fibers geotextile, and this fabric is provided with aperture, the aperture of aperture less (effective aperture O90<0.2mm), only seep water, do not flow soil, and tension tearing toughness height, inner filling earth material can Turf Culture.Being laid on the upper side slope one by one, thereby protection side slope.
After adopting above-mentioned technology, have following benefit:
1. fetch earth on the spot, do not need other constructional materialss, economize on resources;
2. load earth material on the spot, lay one by one, do not need large-scale construction equipment equipment, easy construction, efficiency of construction height;
3. the ecological engineering bag is laid one by one, can adapt to the distortion on basis;
4. this slope protecting technique, anti-current scour performance is good;
5. on the surface of this bank protection, can Turf Culture, improved view, purified air, improved ecological environment;
6. on rock slope, afforest the more convenient safety of engineering, effect highly significant.
But this " synthetic fibers geotechnique ecological bag " are in use, normally on its surface directly Turf Culture or grass-seed use, the Turf Culture cost is higher, unsuitable large tracts of land is promoted; And the plantation grass-seed is then easily washed away grass-seed by flowing water, can not produce a desired effect.
The utility model content
For overcoming above-mentioned defective, the purpose of this utility model is to provide a kind of simple in structure, cost is low, life-span length can prevent ecological geotextile, ecological geotextile Engineering bag and ecological geotextile that seed is flushed away processing method.
For achieving the above object, a kind of ecological geotextile of the utility model, comprise the first half geotextile and the latter half geotextile that are made into integration, between described the first half geotextile and the latter half geotextile, be provided with grass-seed, wherein, the effective aperture O90 (O95) of described one second part geotextile is less than or equal to the diameter of grass-seed less than 0.2mm to the effective aperture O90 (O95) of small part position in described the first half geotextile.
Wherein, described the first half geotextile and/or the latter half geotextile are the above nonwoven of one deck.
Wherein, described the first half geotextile is low-density nonwoven fabric or fusion-jet type nonwoven.
Wherein, at the mesh fabric that is provided with one deck band mesh up and down between the two halves geotextile, described grass-seed is arranged in the mesh of described mesh fabric.
Wherein, described the latter half geotextile is made up of two-layer nonwoven and one deck weaving gauze at least.
Wherein, described weaving gauze and two-layer nonwoven are hot pressed into one by acupuncture or point.
For achieving the above object, the ecological geotextile Engineering bag of the utility model, comprise two internal layer engineering bag and outer engineering bags that are nested with together, between described internal layer engineering bag and outer engineering bag, be provided with grass-seed to the small part position, wherein said internal layer engineering bag and outer engineering bag are made by the geotextile more than one deck at least, and internal layer engineering bag and outer engineering bag are provided with the hole that does not influence the grass-seed growth.
Wherein, the part position is provided with the mesh fabric of band mesh between described two engineering bags, and described grass-seed is arranged in the mesh of mesh fabric.
Adopt said structure, grass-seed is preset in the geotextile, can prevent effectively that grass-seed from being washed away by flowing water, thereby grass-seed can be grown on geotextile.
Description of drawings
Fig. 1 is the structural representation of the related ecological geotextile embodiment of the utility model.
The specific embodiment
Related herein nonwoven refers to non-weaving cloth, or is adhesive-bonded fabric.It is a kind of fabric that does not need to spin cotton and weave cloth and form, and just textile staple or long filament is carried out orientation or supports row at random, forms fibre net structure, adopts methods such as mechanical, hot sticky or chemistry to reinforce then and forms.
Related herein weaving gauze refers to natural fiber or chemical fibre is woven into netted or cloth shape product.
The utility model is further described below in conjunction with accompanying drawing.
Ecological geotextile of the present utility model comprises the first half geotextile 1 and the latter half geotextile 2 that are made into integration, is provided with grass-seed 3 between described the first half geotextile and the latter half geotextile.Wherein, because the first half geotextile mainly works to cover grass-seed, therefore, the technical requirements of the latter half geotextile can be made about the technical standard (GB/T17639-1998) of non-woven geotextile according to country, and is less than or equal to the diameter of grass-seed in the first half geotextile to the effective aperture O90 (O95) of small part position.In this structure, grass-seed is preset in the geotextile, can prevents effectively that grass-seed from being washed away by flowing water, thereby grass-seed can be grown on geotextile.
Following technical application standard can be used as reference:
|
Interventions Requested |
Unit |
The first half geotextile |
The latter half geotextile |
Normative reference |
1 |
Mass area ratio |
g/m
2 |
60-100 |
100-200 |
D-5261 |
2 |
Thickness |
mm |
0.1-1.0 |
0.5-5.5 |
|
3 |
Breaking strength |
kN/m |
6.0 |
|
D-4632 |
4 |
Elongation at break |
% |
20~40 |
|
|
5 |
Trapezoidal tearing resistance |
N |
|
>140 |
D-4533 |
6 |
The CBR bursting strength |
N |
|
>1000 |
D-3786 |
7 |
Effective aperture O95 |
mm |
0.15 more than |
0.07-0.2 |
GB/T17639-1998 |
8 |
Transmission coefficient |
cm/sec |
10-1 |
10-1 |
D-4491 |
9 |
The uvioresistant strength retention |
% |
500h-70 |
500h-70 |
D-4355 |
As further improvement of the present utility model, above-mentioned the first half geotextile and/or the latter half geotextile are the above nonwoven of one deck.Above-mentioned the first half geotextile is low-density nonwoven fabric or fusion-jet type nonwoven.
As the further improvement of technique scheme, at the mesh fabric 4 that is provided with one deck band mesh up and down between the two halves geotextile, described grass-seed is arranged in the mesh of described mesh fabric.Described mesh fabric can be textile strand cloth etc.This structure both can effectively improve the tension tearing toughness of fabric, again can be well the fixing position of grass-seed, can reduce the use amount of grass-seed in geotextile manufacturing process of the present utility model greatly.
Wherein, above-mentioned the latter half geotextile is made up of two-layer nonwoven and one deck weaving gauze at least, increases the tension tearing toughness that the weaving gauze can effectively improve fabric in the latter half geotextile.Above-mentioned weaving gauze and two-layer nonwoven are combined into one by technologies such as acupuncture or some hot pressing.
A kind of distortion as above-mentioned utility model, ecological geotextile Engineering bag of the present utility model, comprise two internal layer engineering bag and outer engineering bags that are nested with together, between described internal layer engineering bag and outer engineering bag, be provided with grass-seed to the small part position, wherein said internal layer engineering bag and outer engineering bag are made by the geotextile more than one deck at least, and internal layer engineering bag and outer engineering bag are provided with the hole that does not influence the grass-seed growth.Wherein, the described hole that does not influence the grass-seed growth is that the diameter of finger-hole does not influence the growth of its root system, and for outer Engineering bag, is meant the growth that does not influence cursive script with respect to the internal layer Engineering bag.According to relevant national standards, usually geotextile itself effective aperture O90 (O95)<0.2 millimeter, again in conjunction with the elasticity of geotextile self, this aperture can not influence the growth of grass-seed root system, therefore the internal layer Engineering bag material can select effective aperture O90 (O95)<0.2 millimeter geotextile manufacturing for use, and, can choose effective aperture O90 (O95) greater than 0.15 millimeter geotextile manufacturing according to the size of cursive script itself less than 1 millimeter for outer Engineering bag.
The part position is provided with the mesh fabric of band mesh between described two engineering bags, and described grass-seed is arranged in the mesh of mesh fabric.This structure both can effectively improve the tension tearing toughness of fabric, again can be well the fixing position of grass-seed, can reduce the use amount of grass-seed in geotextile manufacturing process of the present utility model greatly.
The utility model is not limited to above-mentioned embodiment; no matter on its shape or structure, do any variation; every to utilize the ecological geotextile of said structure and ecological engineering bag fabric thereof all be a kind of distortion of the present utility model, all should think and drop within the utility model protection domain.