Greening protection structure for roadbed slope filled with construction waste regenerated coarse-grained soil

Abstract

The utility model provides a greening protection structure of a roadbed slope filled with construction waste regenerated coarse-grained soil, and relates to the technical field of slopes, the greening protection structure comprises a roadbed slope, a clay layer containing organic matters, a net-based composite slope protection pad and a soil layer, the roadbed slope comprises the construction waste regenerated coarse-grained soil; the clay layer containing organic matters is laid on the upper surface of the roadbed slope; the net-based composite slope protection pad is fixed on the upper surface of the clay layer containing organic matters through an anchoring system; and the soil layer is uniformly spread on the upper surface of the net-based composite slope protection pad. According to the utility model, the clay layer containing organic matters is used for protecting the construction waste regenerated coarse-grained soil; rainwater is prevented from scouring the slope surface through the net-based composite slope protection pad, and the erosion effect of surface runoff of the slope surface is reduced. According to the structure, external rainwater can be prevented from invading, the stability of the roadbed slope filled with the construction waste regenerated coarse particle soil is effectively guaranteed, meanwhile, the slope can be rapidly greened, and the dual purposes of waste utilization and ecological protection are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of side slopes, in particular to a greening protection structure for filling roadbed side slopes with coarse granular soil recycled from construction waste. Background Art

[0002] At present, some technologies have been tried to use abandoned construction materials to fill slopes, which can effectively utilize waste, reduce dependence on new resources, and reduce project costs. However, abandoned construction materials are mostly coarse-grained materials. On the one hand, their structure is loose and their water retention performance is insufficient. When they come into contact with water, they are easy to decompose and their strength decreases, affecting the stability of the slope. On the other hand, their porosity is large and their water retention is poor, which makes the water content of the slope filled with coarse-grained soil recycled from construction waste too low, and cannot provide suitable growth conditions for green plants. Utility Model Content

[0003] The purpose of the utility model is to provide a greening protection structure for filling roadbed slopes with coarse granular soil recycled from construction waste to solve the above problems. In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0004] The present application provides a greening protection structure for filling roadbed slopes with coarse-grained soil recycled from construction waste, comprising: a roadbed slope, a clay layer containing organic matter, a mesh-based composite slope protection mat and a soil layer, wherein the roadbed slope comprises coarse-grained soil recycled from construction waste; the clay layer containing organic matter is laid on the upper surface of the roadbed slope; the mesh-based composite slope protection mat is fixed to the upper surface of the clay layer containing organic matter by an anchoring system; and the soil layer is evenly spread on the upper surface of the mesh-based composite slope protection mat.

[0005] Furthermore, the mesh-based composite slope protection mat includes an ecological cloth base layer, a coconut fiber blanket, a matrix and seed mixture, and an erosion control layer; the ecological cloth base layer is an ecological textile with water permeability, and the lower surface of the ecological cloth base layer is connected to a clay layer containing organic matter; the erosion control layer is a wavy structure, and the material is polypropylene with added carbon black, and the bottom of the erosion control layer is connected to the upper surface of the ecological cloth base layer; the coconut fiber blanket is located in the middle of the erosion control layer, serving as the symmetry axis of the erosion control layer; the matrix and seed mixture are sewn inside the mesh-based composite slope protection mat.

[0006] Furthermore, the anchoring system includes a concrete or mortar-laid stone shoulder guard and a plurality of J-shaped nails; the concrete or mortar-laid stone shoulder guard is arranged at the top of the roadbed slope and presses the edge of the mesh-based composite slope protection pad; the nail rod of the J-shaped nail penetrates the mesh-based composite slope protection pad and the clay layer containing organic matter and is inserted into the interior of the roadbed slope, and the nail head of the J-shaped nail is provided with a bending portion, and the free end of the bending portion is inserted into the mesh-based composite slope protection pad.

[0007] Furthermore, a border water retaining edge is provided at the top of the roadbed slope, a concrete or mortar-laid stone foundation is provided at the bottom of the roadbed slope, and a drainage ditch is provided on the side of the concrete or mortar-laid stone foundation away from the roadbed slope.

[0008] Furthermore, the roadbed slope is also provided with a drainage groove, one end of which is connected to the border water retaining edge, and the other end of which is connected to the drainage ditch.

[0009] Furthermore, a plurality of barbs are arranged around the nail rod of the J-shaped nail.

[0010] Furthermore, the plurality of J-shaped nails are arranged in a plum blossom shape.

[0011] Furthermore, the mesh-based composite slope protection pads are connected by binding steel wires.

[0012] Furthermore, the pH value of the organic clay layer is between 6.0-8.5, the EC value is ≤1ms / cm, the organic matter content is ≥15g / kg, the free expansion rate is ≤40%, and the plasticity index is >20.

[0013] Furthermore, the thickness of the clay layer containing organic matter is 5cm-10cm, and the thickness of the soil layer is 1cm-3cm.

[0014] The beneficial effects of the utility model are:

[0015] The utility model prevents rainfall from penetrating into the slope through the clay layer containing organic matter, thus protecting the coarse-grained soil recycled from construction waste; the special structure of the erosion control layer in the mesh-based composite slope protection mat can effectively prevent rainwater from scouring the slope surface and reduce the erosion effect of surface runoff on the slope; the soil layer prevents too many grass seeds from falling into the mesh-based composite slope protection mat. The utility model can not only isolate the intrusion of external rainwater and effectively ensure the stability of the roadbed slope filled with coarse-grained soil recycled from construction waste, but also realize the rapid greening of the slope, achieving the dual goals of waste utilization and ecological protection.

[0016] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the embodiments of the utility model. The purpose and other advantages of the utility model can be achieved and obtained by the structures specifically pointed out in the written description, claims, and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the cross-sectional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the net-based composite slope protection mat of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure and installation of the J-type nail of the utility model;

[0021] Figure 4 A schematic diagram of the planar structure of the utility model when no soil layer is spread.

[0022] Markings in the figure:

[0023] 1. Drainage ditch; 2. Concrete or mortar-laid rubble foundation; 3. Grid-based composite slope protection pad; 4. Edge water retaining edge; 5. Concrete or mortar-laid rubble shoulder; 6. J-shaped nails; 7. Drainage trough; 8. Binding wire; 9. Steps; 10. Clay layer containing organic matter; 11. Roadbed slope; 12. Eco-fabric base layer; 13. Coconut fiber blanket; 14. Matrix and seed mixture; 15. Erosion control layer; 16. Soil layer. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. The components of the embodiment of the utility model generally described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiment of the utility model provided in the drawings is not intended to limit the scope of the utility model for protection, but merely represents the selected embodiment of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the utility model.

[0025] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. At the same time, in the description of the present utility model, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0026] This embodiment provides a greening protection structure for roadbed slopes filled with coarse granular soil recycled from construction waste, such as Figure 1 As shown, it includes: a roadbed slope 11, an organic clay layer 10, a mesh-based composite slope protection mat 3 and a soil layer 16. The roadbed slope 11 is obtained by filling coarse granular soil recycled from construction waste. The organic clay layer 10 is laid on the upper surface of the roadbed slope 11, with a thickness of 5cm-10cm. The pH value of the organic clay layer 10 is between 6.0-8.5, the EC value is ≤1ms / cm, the organic matter content is ≥15g / kg, the free expansion rate is ≤40%, and the plasticity index is >20. The mesh-based composite slope protection mat 3 is fixed on the upper surface of the organic clay layer 10 by an anchoring system, and the mesh-based composite slope protection mat 3 is connected by binding steel wires 8. The soil layer 16 is evenly spread on the upper surface of the mesh-based composite slope protection mat 3, with a thickness of 1cm-3cm.

[0027] It should be noted that the organic clay layer 10 prevents rainfall from penetrating into the slope, thus protecting the coarse granular soil regenerated from construction waste. On the other hand, the organic clay layer 10 has certain water retention and water holding capacity, which can lock rainfall on the slope, provide sufficient water for plant growth, and also provide organic matter for plant growth. The thickness of 5cm-10cm provides sufficient space for the plant roots to develop downward, enhances the root reinforcement effect of the plant roots on the slope, and improves the stability of the shallow surface of the slope.

[0028] like Figure 2 As shown, the mesh-based composite slope protection mat 3 includes an ecological cloth base layer 12, a coconut fiber blanket 13, a matrix and seed mixture 14 and an erosion control layer 15; the ecological cloth base layer 12 is an ecological textile with water permeability, and the lower surface of the ecological cloth base layer 12 is connected to a clay layer 10 containing organic matter; the erosion control layer 15 is a wavy structure, and the material is polypropylene with carbon black added, and the bottom of the erosion control layer 15 is connected to the upper surface of the ecological cloth base layer 12; the coconut fiber blanket 13 is located in the middle of the erosion control layer 15, serving as the symmetry axis of the erosion control layer 15; the matrix and seed mixture 14 is sewn into the gap formed between the erosion control layer 15, the ecological cloth base layer 12 and the coconut fiber blanket 13.

[0029] It should be noted that the erosion control layer 15 in this embodiment is a symmetrical wavy structure, which is made by hot-melt spinning of polypropylene. Carbon black is added to the polypropylene, which effectively improves the service life of the mesh-based composite slope protection mat 3 and ensures the anti-scouring ability of the slope before vegetation is established.

[0030] The present application realizes rapid regreening of the slope through the mesh-based composite slope protection mat 3. The matrix is ​​a nutrient for plant growth, with an organic matter content of ≥94% and a water retention capacity of ≥900%. By sewing the matrix and seed mixture 14 inside the mesh-based composite slope protection mat 3, on the one hand, the seeds can grow quickly to form vegetation, and on the other hand, the problem of seeds and nutrients being enriched at the foot of the slope under the influence of gravity in conventional regreening schemes is avoided, so that the regreening effect of the slope is more uniform.

[0031] When the soil layer 16 is just spread on the upper surface of the mesh-based composite slope protection mat 3, the soil layer 16 will fill the pores of the mesh-based composite slope protection mat 3 with watering and curing. When the seeds in the mesh-based composite slope protection mat 3 grow and produce grass seeds, the grass seeds fall into the soil layer 16, and then the grass seeds in the soil layer 16 continue to grow to form greening, forming renewable vegetation. If the soil layer 16 is not set, when the seeds in the mesh-based composite slope protection mat 3 grow and produce grass seeds, a large number of grass seeds fall into the mesh-based composite slope protection mat 3. With the growth of a large number of grass seeds, the erosion control layer 15 and the coconut fiber blanket 13 of the mesh-based composite slope protection mat 3 will be lifted, resulting in the formation of cavities in the mesh-based composite slope protection mat 3 or even structural damage, making the slope surface unable to resist rain erosion, affecting the stability of the slope surface.

[0032] The anchoring system includes a concrete or mortar-laid stone shoulder guard 5 and a plurality of J-shaped nails 6; the concrete or mortar-laid stone shoulder guard 5 is arranged on the top of the roadbed slope 11, and the upper edge of the mesh-based composite slope protection pad 3 should extend by no less than 0.5m and be buried under the concrete or mortar-laid stone shoulder guard 5, so that the concrete or mortar-laid stone shoulder guard 5 presses the edge of the mesh-based composite slope protection pad 3 to prevent rainwater from flowing into the gap below the mesh-based composite slope protection pad 3.

[0033] like Figure 3 As shown, the nail rod of the J-shaped nail 6 penetrates the mesh-based composite slope protection mat 3 and the clay layer 10 containing organic matter and is inserted into the roadbed slope 11. The nail head of the J-shaped nail 6 is provided with a bent portion, and the free end of the bent portion is inserted into the mesh-based composite slope protection mat 3. A plurality of barbs are provided around the nail rod of the J-shaped nail 6.

[0034] like Figure 4 As shown, the plurality of J-shaped nails 6 are arranged in a plum blossom shape. When the slope is not steeper than 1:1, the J-shaped nails 6 are arranged at a spacing of 1m. When the slope is steeper than 1:1, the J-shaped nails need to be arranged densely.

[0035] The top of the roadbed slope 11 is provided with a border water retaining edge 4, the bottom of the roadbed slope 11 is provided with a concrete or mortar-laid stone foundation 2, and the side of the concrete or mortar-laid stone foundation 2 away from the roadbed slope 11 is provided with a drainage ditch 1.

[0036] The roadbed slope 11 is also provided with a drainage groove 7 , one end of which is connected to the border water retaining edge 4 , and the other end of which is connected to the drainage ditch 1 .

[0037] The roadbed slope 11 is further provided with a step 9 , one end of which is located at the concrete or mortar-laid rubble shoulder 5 , and the other end of which is located at the concrete or mortar-laid rubble foundation 2 .

[0038] The construction process of this embodiment is as follows:

[0039] Use recycled coarse granular soil from construction waste to fill the roadbed slope11;

[0040] Construct the concrete or mortar-laid rubble shoulder 5, the drainage ditch 1, the concrete or mortar-laid rubble foundation 2, the border water retaining edge 4 and the step 9 in sequence;

[0041] On the upper surface of the roadbed slope 11, a clay layer 10 containing organic matter is constructed by using imported soil;

[0042] The upper surface of the organic clay layer 10 is covered with a mesh-based composite slope protection mat 3;

[0043] Fix the mesh-based composite slope protection mat 3 by means of barbed J-shaped nails 6;

[0044] Spreading a soil layer 16 on the upper surface of the mesh-based composite slope protection mat 3;

[0045] Finally water and cure for 45 days.

[0046] It should be noted that before construction, the activity of the seeds in the mesh-based composite slope protection mat 3 needs to be checked, and samples need to be taken for germination test. The mesh-based composite slope protection mat 3 with a germination rate of ≥85% meets the construction requirements.

[0047] The utility model structure can utilize a large amount of construction waste to regenerate coarse-grained soil, reduce environmental pollution, save resources, and cooperate with the construction process to shorten the construction time by 40-60%, save costs by 5-15%, and improve the greening effect. The greening vegetation is renewable vegetation, which forms permanent protection for the roadbed slope 11, achieving the dual goals of waste utilization and ecological protection.

[0048] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

[0049] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A greening protection structure for roadbed slopes filled with coarse-grained soil recycled from construction waste, characterized in that: include: A roadbed slope (11), wherein the roadbed slope (11) comprises coarse-grained soil recycled from construction waste; A clay layer (10) containing organic matter, wherein the clay layer (10) containing organic matter is laid on the upper surface of a roadbed slope (11); A mesh-based composite slope protection mat (3), wherein the mesh-based composite slope protection mat (3) is fixed to the upper surface of the organic clay layer (10) through an anchoring system; A soil layer (16), wherein the soil layer (16) is evenly spread on the upper surface of the mesh-based composite slope protection mat (3).

2. The greening protection structure for roadbed slope filled with coarse-grained soil recycled from construction waste according to claim 1 is characterized in that: The mesh-based composite slope protection mat (3) comprises an ecological cloth base layer (12), a coconut fiber blanket (13), a matrix and seed mixture (14) and an erosion control layer (15); the ecological cloth base layer (12) is an ecological textile and has water permeability, and the lower surface of the ecological cloth base layer (12) is connected to a clay layer (10) containing organic matter; the erosion control layer (15) is a wavy structure, and the material is polypropylene added with carbon black, and the bottom of the erosion control layer (15) is connected to the upper surface of the ecological cloth base layer (12); the coconut fiber blanket (13) is located in the middle of the erosion control layer (15) and serves as the symmetry axis of the erosion control layer (15); and the matrix and seed mixture (14) is sewn inside the mesh-based composite slope protection mat (3).

3. The greening protection structure for roadbed slope filled with coarse-grained soil recycled from construction waste according to claim 1 is characterized in that: The anchoring system comprises a concrete or mortar-laid rubble shoulder (5) and a plurality of J-shaped nails (6); the concrete or mortar-laid rubble shoulder (5) is arranged at the top of a roadbed slope (11) and presses the edge of a mesh-based composite slope protection mat (3); the nail rod of the J-shaped nail (6) penetrates the mesh-based composite slope protection mat (3) and the organic clay layer (10) and is inserted into the inside of the roadbed slope (11); the nail head of the J-shaped nail (6) is provided with a bent portion, and the free end of the bent portion is inserted into the mesh-based composite slope protection mat (3).

4. The greening protection structure for roadbed slope filled with coarse-grained soil recycled from construction waste according to claim 1 is characterized in that: The top of the roadbed slope (11) is provided with a bordered water retaining edge (4), the bottom of the roadbed slope (11) is provided with a concrete or mortar-laid slab stone foundation (2), and a drainage ditch (1) is provided on the side of the concrete or mortar-laid slab stone foundation (2) away from the roadbed slope (11).

5. The greening protection structure for roadbed slope filled with coarse-grained soil recycled from construction waste according to claim 4 is characterized in that: The roadbed slope (11) is also provided with a drainage groove (7), one end of which is connected to the border water retaining edge (4) and the other end of which is connected to the drainage ditch (1).

6. The greening protection structure for roadbed slope filled with coarse-grained soil recycled from construction waste according to claim 3 is characterized in that: A plurality of barbs are arranged around the nail rod of the J-shaped nail (6).

7. The greening protection structure for roadbed slope filled with coarse-grained soil recycled from construction waste according to claim 3 is characterized in that: The plurality of J-shaped nails (6) are arranged in a plum blossom shape.

8. The greening protection structure for roadbed slope filled with coarse-grained soil recycled from construction waste according to claim 1 is characterized in that: The web-based composite slope protection mat (3) is connected between webs using binding steel wires (8).

9. The greening protection structure for roadbed slope filled with coarse-grained soil recycled from construction waste according to claim 1 is characterized in that: The pH value of the organic clay layer (10) is between 6.0 and 8.5, the EC value is ≤1ms / cm, the organic matter content is ≥15g / kg, the free expansion rate is ≤40%, and the plasticity index is >20.

10. The greening protection structure for roadbed slope filled with coarse-grained soil recycled from construction waste according to claim 1 is characterized in that: The thickness of the organic clay layer (10) is 5 cm to 10 cm, and the thickness of the soil layer (16) is 1 cm to 3 cm.

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