CN216163991U - Gravel retention step foreign soil spray-seeding structure - Google Patents
Gravel retention step foreign soil spray-seeding structure Download PDFInfo
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- CN216163991U CN216163991U CN202122080463.1U CN202122080463U CN216163991U CN 216163991 U CN216163991 U CN 216163991U CN 202122080463 U CN202122080463 U CN 202122080463U CN 216163991 U CN216163991 U CN 216163991U
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Abstract
The utility model relates to a gravel retention stage alien soil spray-seeding structure which comprises cement shooting nails arranged on a base slope, a plurality of porous gravel retention stages formed by interval spraying to the base slope at the positions of the cement shooting nails and solidifying and a alien soil layer sprayed between the porous gravel retention stages, wherein plant seeds are filled in the alien soil layer, the height of the porous gravel retention stages is less than or equal to the designed thickness of the alien soil layer, the section of each porous gravel retention stage is approximately an equilateral triangle, and the width of the bottom edge of each porous gravel retention stage is 10-15 cm. According to the gravel retention step foreign soil spray-seeding structure, the retention step is used for replacing a steel wire mesh and a horizontal blocking measure in a net hanging spray-seeding technology, so that sprayed foreign soil is separated by the retention step to absorb force and store the water, and a washboard-shaped or three-dimensional coarse gravel ridge water-permeable rough surface formed by the retention step can prevent soil layer slippage, facilitate root system penetration and achieve a better foreign soil fixing effect.
Description
Technical Field
The utility model relates to the technical field of ecological restoration, in particular to a gravel retention stage alien soil spray-seeding structure which is particularly suitable for ecological restoration of a rock slope or a concrete protection slope along a layer.
Background
According to the engineering form, the slope greening engineering construction technology can be divided into 9 types of earthing planting, spray seeding greening, loam-like matrix greening, ecological bags, pit (groove) type, hole (cave) type, step method, suspension method and composite greening technology. The foreign soil spray-seeding technology is a re-greening technology for spraying artificial base materials for re-greening on an engineering slope surface by adopting a spray-seeding machine, and can be divided into net hanging spray-seeding (mainly combining a metal net with the foreign soil spray-seeding), common hydraulic spray-seeding and thick-layer base material spray-seeding according to process types.
In the net hanging spray seeding technology, the requirement on the flatness of the slope is high, the phenomenon that the sprayed foreign soil slips and falls off due to the fact that the bottom layer is saturated and water is retained easily occurs after the construction of the high and steep bedding rock slope, and horizontal blocking measures such as ecological bars and organic matter parting strips are often needed to be added. Therefore, it is necessary to research a new spraying foundation structure to replace the existing steel wire mesh and blocking measures to inhibit the falling-off phenomenon existing in the spraying foreign soil.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems that the saturated water holding of the bottom layer of the sprayed foreign soil is easy to slip and fall off due to the net hanging and the concrete protection slope is difficult to regress by spraying along the rock slope of the bedding, and provides a gravel retention stage foreign soil spraying structure for replacing the net hanging and other measures, blocking the foreign soil layer, dredging the seepage of the bottom layer to prevent the soil layer from slipping, facilitating the penetration of root systems and further achieving a better foreign soil fixing effect.
In order to achieve the purpose, the utility model provides a gravel retention step foreign soil spraying structure which comprises cement shooting nails arranged on a base slope, a plurality of porous gravel retention steps formed by spraying the cement shooting nails to the base slope at intervals and solidifying, and a foreign soil layer sprayed between the porous gravel retention steps, wherein plant seeds are filled in the foreign soil layer, the height of the porous gravel retention steps is smaller than or equal to the designed thickness of the foreign soil layer, the cross section of each porous gravel retention step is approximately in the shape of an equilateral triangle, and the width of the bottom edge of each porous gravel retention step is 10-15 cm.
When the gradient of the foundation slope is 25-45 degrees, the distance between the porous gravel detention stages along the longitudinal direction of the slope is 0.8-1.2 m; when the slope of the foundation slope is larger than 45 degrees, the distance is 0.5-0.8 m.
Preferably, the strength grade of the retention stage of the porous gravel is greater than the C20 grade, the bending and pulling strength of the 28d age is greater than or equal to 2.5MPa, the water permeability coefficient is greater than or equal to 0.5mm/s, and the continuous porosity is greater than or equal to 10%.
Preferably, the porous gravel retention stage has a freezing resistance rating of D25 in hot summer, cold winter and a freezing resistance rating of D35 in cold regions.
Preferably, the porous gravel retention stage is 1323kg/m3156.6kg/m of gravel362.64kg/m of cement3The mixed water is sprayed to the bedding rock or concrete slope surface for consolidation.
Preferably, the distribution form of the plurality of porous gravel retention steps on the base slope comprises a horizontal step, a straight step or a zigzag step.
Based on the technical scheme, the utility model has the advantages that:
according to the gravel retention step foreign soil spray-seeding structure, the retention step is used for replacing a steel wire mesh and a horizontal blocking measure in a net hanging spray-seeding technology, so that sprayed foreign soil is separated by the retention step to absorb force and store the water, and a washboard-shaped or three-dimensional coarse gravel ridge water-permeable rough surface formed by the retention step can prevent soil layer slippage, facilitate root system penetration and achieve a better foreign soil fixing effect.
Compared with the net hanging spray seeding, the retention step in the structure of the utility model is to establish a firm and permeable separation support structure layer in the middle of the soil dressing layer on the bedding rock slope or the concrete protection slope, which is beneficial to draining water and eliminating the hidden danger of slipping of the soil dressing layer, has the advantages of stagnant subsurface water, retaining nutrient soil and fixing plant roots, and can replace the net hanging spray seeding on the slope surface of 25-45 degrees.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the utility model and together with the description serve to explain the utility model without limiting the utility model. In the drawings:
FIG. 1 is a schematic view of a gravel retention stage alien soil spray-seeding structure;
FIG. 2 is a schematic horizontal level diagram;
FIG. 3 is a schematic view of a word level;
FIG. 4 is a schematic diagram of a step.
Detailed Description
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
The utility model provides a gravel retention step type alien soil spray-seeding structure, which is shown in figures 1-4 and is a preferred embodiment of the utility model.
Specifically, as shown in fig. 1, the gravel retention step foreign soil spray-seeding structure comprises cement shooting nails 2 arranged on a foundation slope 1, a plurality of porous gravel retention steps 4 formed by spraying the cement shooting nails 2 on the foundation slope 1 at intervals and solidifying, and a foreign soil layer 3 sprayed between the porous gravel retention steps 4, plant seeds are filled in the foreign soil layer 3, the height of the porous gravel retention steps 4 is less than or equal to the design thickness of the foreign soil layer 3, the cross section of the porous gravel retention steps 4 is approximately an equilateral triangle, and the width of the bottom side is 10-15 cm.
According to the gravel retention step foreign soil spray-seeding structure, the retention step is used for replacing a steel wire mesh and a horizontal blocking measure in a net hanging spray-seeding technology, so that sprayed foreign soil is separated by the retention step to absorb force and store water, and a washboard-shaped or three-dimensional coarse gravel ridge water-permeable rough surface formed by the retention step can prevent a bottom soil layer from being saturated, retained and slipped, root system penetration is facilitated, and a better foreign soil fixing effect is achieved.
Preferably, the porous gravel retention stage 4 is 1323kg/m3156.6kg/m of gravel362.64kg/m of cement3The mixed water is sprayed to the bedding rock or concrete slope surface for consolidation. The strength grade of the porous gravel retention stage 4 is greater than the C20 grade, the bending and pulling strength of the gravel retention stage at the age of 28d is greater than or equal to 2.5MPa, the water permeability coefficient is greater than or equal to 0.5mm/s, and the continuous porosity is greater than or equal to 10%. More preferably, the porous gravel retention stage 4 has a freezing resistance rating of D25 in hot summer and cold winter regions and a freezing resistance rating of D35 in cold regions.
Further, the light brick and tile type construction waste is selected by the gravel, crushed and subjected to harmless treatment, and the particle size is controlled to be 5-10 mm. The crushed construction waste is called reuse gravel below, and the performance index of the reuse gravel meets the requirement of the following table 1.
TABLE 1 Performance index of recycled gravel
| Item | Unit of | Index (I) |
| Micro powder content (by mass) | ％ | <1.0 |
| Content of mud cake (by mass) | ％ | <0.5 |
| By mass (by mass) | ％ | <3.0 |
| Needle-shaped particles (by mass) | ％ | <10 |
| Apparent density | kg/m3 | >2350 |
| Loose packed porosity | ％ | <50 |
| Sulfides and sulfates (converted to SO3 by mass) | ％ | <2.0 |
| Sundries (by mass) | ％ | <1.0 |
| Loss of mass | ％ | <5.0 |
| Crush index | ％ | <20.0 |
| Organic matter | Qualified |
As shown in fig. 2 to 4, the distribution pattern of the plurality of porous gravel retention steps 4 on the base slope 1 includes a horizontal step, a straight step or a zigzag step. And fixing the porous gravel retention step 4 on the slope surface, and determining the interval along the longitudinal direction of the slope according to the gradient. When the gradient of the foundation slope 1 is 25-45 degrees, the distance between the porous gravel retention steps 4 along the longitudinal direction of the slope is 0.8-1.2 m; when the gradient of the base slope 1 is larger than 45 degrees, the distance is 0.5-0.8 m.
Mixing plant seeds and foreign soil together, spraying the mixture between the porous gravel retention steps 4 to form a foreign soil layer 3, and directly spraying the mixture onto a slope surface through a spray seeder, wherein the height of the porous gravel retention steps 4 is less than or equal to the design thickness of the foreign soil layer 3.
Compared with the net hanging spray seeding, the retention step in the structure of the utility model is to establish a firm and permeable separation support structure layer in the middle of the soil dressing layer on the rock stratum, which is beneficial to draining water, eliminates the hidden danger of saturated water holding slippage of the soil dressing bottom layer, has the advantages of retaining submerged water, retaining nutrient soil and fixing plant roots, and can replace the net hanging spray seeding on the slope surface of 25-45 degrees.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the utility model or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the utility model as defined by the appended claims.
Claims (5)
1. The utility model provides a gravel is detained rank foreign soil and is spouted structure which characterized in that: the device comprises cement shooting nails (2) arranged on a base slope (1), a plurality of porous gravel retention steps (4) formed by solidifying the positions of the cement shooting nails (2) which are sprayed to the base slope (1) at intervals, and a passenger soil layer (3) sprayed between the porous gravel retention steps (4), wherein plant seeds are filled in the passenger soil layer (3), the height of the porous gravel retention steps (4) is less than or equal to the design thickness of the passenger soil layer (3), the section of each porous gravel retention step (4) is approximately an equilateral triangle, and the width of the bottom edge is 10-15 cm;
when the gradient of the foundation slope (1) is 25-45 degrees, the distance between the porous gravel retention steps (4) along the longitudinal direction of the slope is 0.8-1.2 m; when the slope of the base slope (1) is larger than 45 degrees, the distance is 0.5-0.8 m.
2. The gravel retention step alien soil spray-seeding structure according to claim 1, wherein: the strength grade of the porous gravel retention stage (4) is greater than the C20 grade, the bending and pulling strength of the gravel retention stage at the age of 28d is greater than or equal to 2.5MPa, the water permeability coefficient is greater than or equal to 0.5mm/s, and the continuous porosity is greater than or equal to 10%.
3. The gravel retention step alien soil spray-seeding structure according to claim 1, wherein: the freezing resistance of the porous gravel retention stage (4) in hot summer, cold winter and cold regions is D25 grade, and the freezing resistance of the porous gravel retention stage in cold regions is D35 grade.
4. The gravel retention step alien soil spray-seeding structure according to claim 1, wherein: the porous gravel retention stage (4) is 1323kg/m3156.6kg/m of gravel362.64kg/m of cement3The mixed water is sprayed to the bedding rock or concrete slope surface for consolidation.
5. The gravel retention step alien soil spray-seeding structure according to claim 1, wherein: the distribution form of the multi-channel porous gravel retention steps (4) on the foundation slope (1) comprises a horizontal step, a straight step or a zigzag step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122080463.1U CN216163991U (en) | 2021-08-31 | 2021-08-31 | Gravel retention step foreign soil spray-seeding structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122080463.1U CN216163991U (en) | 2021-08-31 | 2021-08-31 | Gravel retention step foreign soil spray-seeding structure |
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| Publication Number | Publication Date |
|---|---|
| CN216163991U true CN216163991U (en) | 2022-04-05 |
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| CN202122080463.1U Active CN216163991U (en) | 2021-08-31 | 2021-08-31 | Gravel retention step foreign soil spray-seeding structure |
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| CN (1) | CN216163991U (en) |
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2021
- 2021-08-31 CN CN202122080463.1U patent/CN216163991U/en active Active
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