Stiffening Skeleton Grass-planting Slope Protection System and Construction Method

Abstract

The present invention relates to the technical field of slope protection, and particularly relates to a reinforced framework grass-planting slope protection system, which includes a slope support framework, slope support stiffening bars, and slope grass-planting soil covering. The slope support framework and the slope support stiffening bars are both made by casting geopolymer materials; multiple slope grass-planting soil covering areas are provided inside the slope support framework. Inside the slope grass-planting soil covering areas, slope support stiffening bars are laid and slope grass-planting soil covering that covers the slope support stiffening bars is provided. The slope support stiffening bars are of a T-shaped structure, and the slope grass-planting soil covering is made by mixing soil, natural fibers, and grass seeds. The present invention can effectively prevent the cumulative landslide of the soil body in the slope grass-planting soil covering area caused by rainwater scouring, avoid the soil body at the top of the slope grass-planting soil covering area from becoming void and the deformation of the slope support framework, improve the effect of soil fixation and slope protection, alleviate problems such as the loss of rooted soil, underdeveloped root systems, and withering of plants in traditional framework slope protection under rainwater scouring, avoid repeated maintenance, and achieve the effect of low cost in the whole life cycle.

Description

Technical Field

[0001] The present invention relates to the technical field of slope protection, and particularly to the field of framed grass planting slope protection. Background Art

[0002] Framed grass planting slope protection refers to a slope protection form of surface protection formed by using mortar rubble masonry or concrete to form a framework on the slope surface, and filling the framework with soil and turf, spraying grass seeds, planting seedlings, etc. Because a framework is formed on the slope surface, it can not only effectively fix the steep slope, reduce the scouring of the surface runoff on the slope body, but also reinforce the slope body through plant planting, enhance the landscape effect and ecological function advantages, and thus become a common ecological slope protection technology at present. It is widely used in highway and railway subgrade slope projects, river construction and riverbank stability reinforcement projects, as well as dike projects of reservoirs and lakes. Especially in river construction projects, framed slope protections such as arch-shaped, door-shaped, and herringbone-shaped can often be seen.

[0003] Existing research results on framed grass planting slope protection mostly focus on reinforcing the framework. For example, Chinese Patent CN117286895A discloses an arch-shaped corrugated steel slope protection structure, which is a continuous arch-shaped corrugated steel slope protection structure formed by interconnecting multiple arch-shaped corrugated steel plates or connecting them through corrugated steel plate pieces as connectors; for example, Chinese Patent CN221276642U discloses an arch-shaped framework for slope protection turf, and a tooth surface is fixedly arranged on the back of the arch-shaped framework to facilitate the arch-shaped framework to be fastened on the slope surface; such frameworks still have the following problems: the soil body in the soil covering area for grass planting on the slope surface is washed by heavy rain for a long time, resulting in soil body voiding, damage, and even landslides, affecting traffic safety; under heavy rain scouring, the rooted soil is washed away, and the roots of the framework plants are not fully developed, resulting in plant withering, greatly damaging the overall aesthetics of the slope protection.

[0004] Regarding how to solve the problems of voiding, damage, rooted soil loss, and plant withering of framed grass planting slope protection under heavy rain scouring, how to improve its rain scouring resistance and protection ability, enhance stability, durability, and ensure the overall aesthetics of the slope protection, there are currently no reported countermeasures or achievements of countermeasure technologies. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a stiffened framed grass planting slope protection system that can effectively avoid the voiding of the top soil body in the soil covering area for grass planting on the slope surface, the deformation of the slope support framework, and prevent soil erosion, and provides a convenient construction method for quickly building this system.

[0006] On the one hand, the present invention provides a stiffened framework grass-planting slope protection system, including a slope support framework, characterized in that: a plurality of slope grass-planting soil covering areas are arranged in the slope support framework, slope support stiffening rods are laid in the slope grass-planting soil covering areas, and slope grass-planting soil covering covering the slope support stiffening rods, the slope support stiffening rods are of a T-shaped structure, and the slope grass-planting soil covering is made of a mixture of soil, natural fiber and grass seeds.

[0007] Laying the slope support stiffening rods can effectively prevent the accumulation of soil body slip in the slope grass-planting soil covering area caused by rainwater scouring, thereby avoiding the soil body at the top of the slope grass-planting soil covering area from becoming void and the deformation of the slope support framework, improving the soil-fixing and slope-protecting effect of the stiffened framework grass-planting slope protection system, alleviating problems such as the loss of planted soil, underdeveloped root systems and plant withering of traditional framework slope protection under rainwater scouring, avoiding repeated maintenance, and achieving the effect of low cost in the whole life cycle.

[0008] As an improvement of the stiffened framework grass-planting slope protection system of the present invention, the top cross bar of the slope support stiffening rod is horizontally arranged, further improving the soil-fixing and slope-protecting effect of the stiffened framework grass-planting slope protection system.

[0009] As an improvement of the stiffened framework grass-planting slope protection system of the present invention, there are multiple groups of the slope support stiffening rods. Among adjacent two groups of slope support stiffening rods, the middle longitudinal rod of the upper slope support stiffening rod abuts against the top cross bar of the lower slope support stiffening rod, and the middle longitudinal rod of the bottommost support stiffening rod abuts against the inner side of the lower edge of the slope support framework, which can prevent the slope support stiffening rods from sliding down and further improve the soil-fixing and slope-protecting effect of the stiffened framework grass-planting slope protection system.

[0010] As an improvement of the stiffened framework grass-planting slope protection system of the present invention, a "T"-shaped groove is formed in the slope grass-planting soil covering area, and the slope support stiffening rod is arranged in the "T"-shaped groove, so that the slope support stiffening rod is installed more firmly and provides a better slope protection effect.

[0011] As an improvement of the stiffened framework grass-planting slope protection system of the present invention, both the slope support framework and the slope support stiffening rods are made by casting with geopolymer materials; a protrusion is arranged at the edge of the upper surface of the slope support framework to form a catchment trough edge around the slope grass-planting soil covering area. The structure made by casting with geopolymer materials has high flexural strength and compressive strength not lower than that of the structure cast with traditional C25 concrete, and has the advantages of high strength and low cost; the catchment trough edge can quickly collect the rainwater flowing down from the slope support framework, avoid the formation of runoff of rainwater in the slope grass-planting soil covering area, and protect the integrity of the vegetation and soil structure in the slope grass-planting soil covering area.

[0012] As an improvement of the stiffening framework grass-planting slope protection system of the present invention, bamboo is provided inside both the top cross bar and the middle longitudinal bar of the slope support stiffening bar. Bamboo is convenient to obtain and low in cost. As a stiffening material, it can effectively improve the flexural strength of the slope support stiffening bar.

[0013] On the other hand, the present invention also provides a construction method for the stiffening framework grass-planting slope protection system, including the following steps: pouring the slope support framework; prefabricating the slope support stiffening bar; excavating a "T"-shaped groove on the inner slope surface of the slope grass-planting soil covering area, and sequentially installing the slope support stiffening bars in the "T"-shaped groove to form a slope support stiffening system inside the framework; mixing soil with natural fibers and grass seeds evenly to make the slope grass-planting soil covering, and filling the slope grass-planting soil covering in the slope support framework.

[0014] The construction method of prefabricating the slope support stiffening bar and installing it in the "T"-shaped groove excavated on site avoids the process of on-site pouring, significantly saving the construction period and cost.

[0015] As an improvement of the construction method of the stiffening framework grass-planting slope protection system of the present invention, when prefabricating the slope support stiffening bar, after placing bamboo in the center of the mold, pouring is carried out.

[0016] As an improvement of the construction method of the stiffening framework grass-planting slope protection system of the present invention, the natural fiber is one or several of rice straw fiber, cotton straw fiber, coconut shell fiber, and palm fiber; the grass seed is one or several of bermudagrass, ryegrass, and tall fescue. The natural fiber stiffens the grass seed growth soil inside the traditional slope protection framework, enhances the shear strength of the soil body and the ability to resist rainwater scouring. The degraded organic matter can also promote plant growth, accelerate the formation of the plant protection layer in the slope grass-planting soil covering area, thereby further improving the soil-fixing and slope protection effect inside the traditional framework, and alleviating problems such as the loss of planted soil, underdeveloped root systems, and plant withering under rainwater scouring in the traditional slope protection framework. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 It is a schematic plan view of the stiffening framework grass-planting slope protection system according to an embodiment of the present invention.

[0019] Figure 2 It is a schematic view of the prefabricated slope support stiffening bar according to an embodiment of the present invention.

[0020] In the figure: 1. Slope support stiffening bar; 2. Slope grass-planting soil covering; 3. Edge of arched water collecting trough; 4. Slope support framework; 5. Bamboo. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually illustrative only and in no way limits the present invention and its application or use. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0022] Unless otherwise specifically stated, the relative arrangements, numerical expressions and values of the components and steps set forth in these embodiments do not limit the scope of the present invention. In all the examples shown and discussed herein, any specific value should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values.

[0023] Embodiment 1: As Figure 1 shown, this embodiment provides a stiffening skeleton grass-planting slope protection system, which includes a slope support skeleton 4 and a plurality of slope grass-planting soil covering areas arranged in the slope support skeleton 4. In this embodiment, an arched slope grass-planting soil covering area is adopted, with a width of 3.6 m and a depth of 0.5 m, arranged in a matrix, and the spacing between each slope grass-planting soil covering area is 0.6 m; a slope support stiffening rod 1 is laid in the slope grass-planting soil covering area, and a slope grass-planting soil covering 2 covering the slope support stiffening rod 1 is provided. The slope support stiffening rod 1 is laid at a position close to the top end of the slope grass-planting soil covering area, and the slope grass-planting soil covering 2 is made of a mixture of soil, natural fiber and grass seeds. The shape of the slope grass-planting soil covering area arranged in the slope support skeleton 4 is not limited to an arch, and can also be arranged in a gate shape, a herringbone shape, etc.

[0024] In some embodiments, the top cross bar of the slope support stiffening rod 1 is horizontally arranged, and it can also be inclined, but the horizontal arrangement has a better support effect. The beneficial effect of these embodiments is to further improve the soil-fixing and slope-protecting effect of the stiffening skeleton grass-planting slope protection system.

[0025] In some embodiments, there are multiple sets of slope support stiffening bars 1. Among two adjacent sets of slope support stiffening bars 1, the middle longitudinal bar of the upper slope support stiffening bar 1 abuts against the top cross bar of the lower slope support stiffening bar 1. When there are multiple columns of slope support stiffening bars 1, the top cross bars of adjacent slope support stiffening bars 1 are abutted against each other, and the middle longitudinal bar of the lowermost support stiffening bar 1 abuts against the inner side of the lower edge of the slope support framework 4. The number of slope support stiffening bars 1 is adjusted according to the size of the slope grass-planting and soil-covering area inside the slope support framework 4, and the top cross bar of the slope support stiffening bar 1 should be avoided from being too long. The middle longitudinal bar of the lowermost support stiffening bar 1 abutting against the inner side of the lower edge of the slope support framework 4 can prevent the slope support stiffening bar 1 from sliding down, and the combination of multiple sets of slope support stiffening bars 1 can provide a better support effect and further improve the slope protection effect.

[0026] In some embodiments, a "T"-shaped groove is formed in the slope grass-planting and soil-covering area, and the slope support stiffening bar 1 is arranged in the "T"-shaped groove. It is also possible to directly place the slope support stiffening bar 1 in the slope grass-planting and soil-covering area and then cover it with soil without digging a groove, but the method of installing by digging a groove is more firm. The beneficial effects of these embodiments are that the slope support stiffening bar 1 is installed more stably, providing a better slope protection effect.

[0027] In some embodiments, both the slope support framework 4 and the slope support stiffening bar 1 are made by casting with a geopolymer material; a protrusion is arranged at the edge of the upper surface of the slope support framework 4 to form an arched water collecting trough edge 3 around the slope grass-planting and soil-covering area. Preferably, the geopolymer material includes slag, fly ash, soil and natural fiber; the natural fiber can be selected from organic fibers such as rice straw, cotton straw, coconut shell, palm, etc. The beneficial effects of these embodiments are: the structure made by casting with a geopolymer material has a high flexural strength and a compressive strength not lower than that of the structure cast with traditional C25 concrete, and has the advantages of high strength and low cost; the arched water collecting trough edge 3 can quickly collect the rainwater flowing down from the slope support framework, avoid the formation of runoff of rainwater in the slope grass-planting and soil-covering area, and protect the integrity of the vegetation and soil structure in the slope grass-planting and soil-covering area.

[0028] In some embodiments, bamboo 5 is arranged inside both the top cross bar and the middle longitudinal bar of the slope support stiffening bar 1, and the whole bamboo is selected for the bamboo 5 instead of bamboo materials. The beneficial effects of these embodiments are that the bamboo 5 is convenient to obtain materials and has a low cost, and as a stiffening material, it can effectively improve the flexural strength of the slope support stiffening bar 1.

[0029] Embodiment 2: This embodiment proposes a construction method for implementing the stiffening framework grass-planting slope protection system described in Embodiment 1, including the following steps:

[0030] The slope is repaired to ensure that its surface is smooth and stable. A rectangular groove with a depth of 0.5m and a width of 0.8m is excavated at the foot of the slope. Only the rectangular groove needs to be excavated at the foot of the slope, and arched grooves with a depth of 0.5m and a width of 3.6m are excavated from the foot of the slope upward. The distance between the two arched grooves is 0.6m. The mold is placed, and the slope support skeleton 4 is cast. It is vibrated and compacted and maintained in time; preferably, a protrusion can be set on the edge of the upper surface of the slope support skeleton 4 while casting the skeleton, forming an arched water collection trough edge 3 around the grass-planting and covering area of ​​the slope.

[0031] Cast in a rectangular prefabricated rod mold with a length, width and height of 1.20×0.25×0.25 m respectively, remove the mold after curing for 28 days, and obtain a rectangular rod, which is used as the top cross bar or middle longitudinal bar of the slope support stiffening rod 1; or directly cast a "T"-shaped rod as the slope support stiffening rod 1;

[0032] A "T"-shaped groove is excavated on the slope surface in the grass-planting and covering area of ​​the slope surface, and the slope support stiffening rods are installed in the "T"-shaped grooves in sequence. The number of the slope support stiffening rods 1 and the "T"-shaped grooves is adjusted according to the size, shape and specific needs of the grass-planting and covering area of ​​the slope surface to form a slope support stiffening system within the framework;

[0033] The soil is mixed with natural fiber and grass seeds to form a slope grass covering soil 2. The soil is selected as a slope protection soil to save costs. The slope grass covering soil 2 is filled in the slope grass covering soil area with a thickness of 1-5 cm. Water is sprayed regularly to keep the soil moist and promote the germination of grass seeds. Straw blankets can also be directly selected, but the cost of straw blankets is relatively high.

[0034] Preferably, the slope support skeleton 4 and the prefabricated slope support stiffener 1 are cast using a geopolymer slurry mixture.

[0035] In some embodiments, when the prefabricated slope supports the stiffening rod 1, Figure 2 As shown, after placing the bamboo in the center of the mold, pouring can be carried out.

[0036] In some embodiments, the natural fiber is one or more of straw fiber, cotton straw fiber, coconut shell fiber, and palm fiber, and the grass species is one or more of bermudagrass, ryegrass, and tall fescue. Bermudagrass, ryegrass, and tall fescue should be selected from grass species with strong adaptability, and other grass species that adapt to local climate and soil conditions can be added at the same time. The beneficial effects of these embodiments are that the natural fiber has a reinforcing effect on the grass seed growth soil within the traditional skeleton slope protection framework, enhances the shear strength and rain erosion resistance of the soil body, and the degraded organic matter can also promote plant growth and accelerate the formation of a plant protective layer in the grass-planting and covering area on the slope, thereby further enhancing the soil consolidation and slope protection effect inside the traditional skeleton, and alleviating the problems of root soil loss, root stunting, and plant wilting in the traditional skeleton slope protection under rain erosion.

Claims

1. A stiffened frame grass planting slope protection system, comprising a slope support frame, characterized in that: The slope support frame is provided with a plurality of slope grassing and covering areas, a protrusion is provided on the edge of the upper surface of the slope support frame, and an arched water collection trough edge is provided around the slope grassing and covering areas; The slope support stiffening rods and the slope grass covering soil covering the slope support stiffening rods are laid in the slope grass covering soil area, and the slope grass covering soil is made of a mixture of soil, natural fiber and grass seeds; the slope support stiffening rods are T-shaped structures, and bamboo is arranged inside the top horizontal rod and the middle longitudinal rod; The slope support stiffening rods are provided in multiple groups, and in two adjacent groups of slope support stiffening rods, the middle longitudinal rods of the upper slope support stiffening rods are butted against the top cross rods of the lower slope support stiffening rods, and the middle longitudinal rods of the bottom support stiffening rods are butted against the inner side of the lower edge of the slope support frame; The slope support stiffener and slope support frame are cast by geopolymer materials, and the geopolymer materials include slag, fly ash, soil and natural fiber; The top cross bar of the slope support stiffening rod is arranged horizontally.

2. The stiffened frame grass-planting slope protection system according to claim 1, characterized in that: A "T"-shaped groove is opened in the grass-planting and soil-covering area of ​​the slope surface, and the slope surface supporting stiffening rod is arranged in the "T"-shaped groove.

3. A construction method of the stiffened frame grass-planting slope protection system according to claim 1, characterized in that: The following steps are involved: Casting slope support frame; Prefabricated slope support stiffeners, made by pouring geopolymer materials after placing bamboo in the center of the mold; geopolymer materials include slag, fly ash, soil and cotton straw; Dig a "T"-shaped groove on the slope surface in the grass-covered area, and install the slope support stiffening rods in the "T"-shaped groove in sequence to form a slope support stiffening system within the framework; Grass seeds and one or more of rice straw fibers, cotton straw fibers, coconut shell fibers and palm fibers are mixed into soil, and the mixture is evenly mixed to form slope grass covering soil, and the slope grass covering soil is filled in the slope support frame.

4. The construction method of the stiffened frame grass-planting slope protection system according to claim 3 is characterized in that: The grass species is one or more of Bermuda grass, ryegrass and tall fescue.

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