Environment-friendly composite reinforced soil structure and construction method

Abstract

The invention discloses an environment-friendly composite reinforced soil structure and a construction method, and belongs to the field of reinforced soil, the environment-friendly composite reinforced soil structure comprises a back soil body, ecological bags which are arranged at the front end of the back soil body in a stepped mode and are arranged in a stepped mode, and anti-corrosion and anti-skid timber piles arranged at the bottom end of the back soil body, the two ends of the flexible ecological grid extend into the back soil body; seeds are sprayed and sown at the top ends of the ecological bags. According to the environment-friendly composite reinforced soil structure and the construction method, the degradable ecological bags are matched with the flexible ecological grids, the effect of stabilizing the soil layer can be achieved through the plant root systems and the flexible ecological grids in the service period, degradation is achieved after the service period expires, and the environment-friendly composite reinforced soil structure is more environmentally friendly and attractive.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of reinforced soil, in particular to an environmentally friendly composite reinforced soil structure and construction method. BACKGROUND

[0002] Reinforced soil structure is a civil engineering technology mainly used to improve the stability and bearing capacity of soil. It constrains the lateral deformation of soil by burying reinforcing materials (such as geogrids, geotextiles or metals) with certain strength in the soil, thereby enhancing the overall integrity and shear strength of the soil. This method can effectively address geological problems such as loose soil and landslides, and is widely used in road embankment reinforcement, slope protection, dam construction and foundation treatment.

[0003] The existing reinforced soil structure is as follows: CN201621480625.3 discloses a frame module type plastic geogrid reinforced soil protection structure, which is composed of a frame type reinforced concrete shelter and a tensile plastic geogrid reinforced soil structure. The side wall of the frame module type reinforced concrete shelter is composed of a reinforced concrete column and a concrete module type wall panel. The top of the frame module type reinforced concrete shelter is a reinforced concrete dome. The double-direction tensile plastic geogrid reinforced soil is covered on the top surface of the reinforced concrete dome. The single-direction tensile plastic geogrid reinforced soil around the outside of the side wall is in the form of a single-direction tensile plastic geogrid reinforced soil with vertical inner side and slope outer side. The single-direction tensile plastic geogrid reinforced soil is connected to the concrete module type wall panel on the inner side through a single-direction tensile plastic geogrid to form a single-direction tensile plastic geogrid reinforced soil retaining wall.

[0004] CN202311627472.5 discloses a reinforced soil steep slope and a construction method thereof. In the steep slope, the deformation energy absorption zone includes an L-shaped mesh and a stone arrangement assembly. The reinforced composite body includes a reinforced soil body, a reinforcing material, and a geotextile bag assembly. The geotextile bag assembly is arranged in the reinforced soil body and located on the side of the reinforced soil body away from the existing steep slope. The reinforcing material is laid in the reinforced soil body and wraps the geotextile bag assembly. The side edges of the geotextile bag assembly, the bottom edge of the L-shaped mesh, and the side edges of the L-shaped mesh form a stone accommodation space. The stone arrangement assembly is filled in the stone accommodation space.

[0005] It can be seen that the existing technology mainly uses non-degradable materials as reinforcing bars, which is not conducive to environmental protection and has poor aesthetics. SUMMARY

[0006] To solve the above problems, the present application provides an environmentally friendly composite reinforced soil structure and construction method. By using degradable ecological bags combined with flexible ecological geogrids, plant roots and flexible ecological geogrids can be used to stabilize the soil layer during the service period, and can be degraded after the service period, which is more environmentally friendly and aesthetically pleasing.

[0007] In order to achieve the above object, the present application provides an environment-friendly composite reinforced soil structure, comprising a back soil body, ecological bags arranged in steps at the front end of the back soil body and arranged in steps, and a corrosion-resistant and anti-skid wood pile arranged at the bottom end of the back soil body, the ecological bags are wrapped by flexible ecological grating, and both ends of the flexible ecological grating extend into the inside of the back soil body. The top end of the ecological bag is sprayed with seeds.

[0008] Preferably, the flexible ecological grating is woven by a flexible ecological rope, and the flexible ecological rope comprises a fertilizer layer and an ecological outer layer arranged in sequence from inside to outside, the ecological outer layer is a hollow cylindrical structure wound by multiple ecological bands, and the adjacent two ecological bands are adhered by ecological glue.

[0009] Preferably, the material of the ecological band is polylactic acid, polyhydroxyalkanoate, bamboo fiber, bamboo charcoal fiber, coconut shell fiber or biodegradable plastic-based composite material.

[0010] Preferably, the biodegradable plastic-based composite material comprises a biodegradable polymer matrix, reinforcing fibers, a plasticizer, a bioactive additive, an antioxidant and an ultraviolet stabilizer, wherein the biodegradable polymer matrix is polylactic acid, polybutylene succinate or polyhydroxyaliphatic acid ester, and the reinforcing fibers are wood fibers or hemp fibers.

[0011] Preferably, the ecological glue is starch-based glue, polylactic acid glue or rubber glue.

[0012] Preferably, the ecological bag comprises a bag body woven by natural fibers and organic soil, water-retaining agent and fertilizer filled in the inside of the bag body, and the natural fibers are wool.

[0013] Preferably, the corrosion-resistant and anti-skid wood pile is an oak, a jackfruit or a black walnut subjected to corrosion treatment.

[0014] The construction method of the environment-friendly composite reinforced soil structure comprises the following steps: S1, the corrosion-resistant and anti-skid wood pile is driven into the ground by using a vibration pile driving method; S2, the flexible ecological grating and the bottommost ecological bag are placed in sequence close to the back of the corrosion-resistant and anti-skid wood pile, and both ends of the flexible ecological grating extend out of the bottommost ecological bag; S3, layered filling: the soil is filled and compacted corresponding to the bottommost ecological bag, and the compacted soil layer is flush with the top end of the bottommost ecological bag; S4, the flexible ecological grating is wrapped, so that the flexible ecological grating wraps the bottommost ecological bag; S5, the steps S2-S4 are repeated, and the ecological bags are stacked in sequence from bottom to top until the construction is completed.

[0015] Preferably, in step S1, the outer surface of oak, jackfruit or black walnut is coated with a preservative, a coating or is subjected to heat treatment or oil treatment to obtain a preservative anti-skid pile, wherein the preservative is coal tar, petroleum or coal pitch, and the coating is paint or oil.

[0016] The present application has the following beneficial effects: 1. Ecologically friendly: By spraying seeds on the top of the ecological bag, vegetation growth is promoted, which helps to restore and improve the ecological environment of the construction site, increases biodiversity, and at the same time, the ecological bag and the flexible ecological grid are made of degradable or environmentally friendly materials, reducing the long-term impact on the environment. 2. Enhanced stability and anti-skid property: The step arrangement of the ecological bag combined with the back soil body, together with the bottom preservative anti-skid pile, can effectively resist soil sliding and improve the stability of the slope, especially in rainy or humid areas, which can significantly reduce the risk of landslides. 3. Flexible adaptability: The step design can be flexibly adjusted according to the actual terrain, suitable for slope reinforcement of different slopes and heights, and the reverse wrapping and deep penetration of the flexible ecological grid enhance the overall structure and adaptability to complex terrain. 4. Promote soil and water conservation: The combination of ecological bags and ecological grids can effectively intercept rainwater and slow down surface runoff, which is beneficial to soil and water conservation and groundwater recharge, reducing soil erosion and maintaining regional hydrological balance. 5. Easy construction and maintenance: The structure uses modular construction, reducing complex site civil work, and the installation of ecological bags and grids is convenient for quick construction, and the maintenance cost is low, which is convenient for inspection and repair. 6. Economic sustainability: The use of degradable materials reduces the dependence on traditional building materials, reduces long-term maintenance and environmental restoration costs, and meets the concept of green building and sustainable development.

[0017] The technical solutions of the present application will be further described in detail below through the drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 Figure 1 is a cross-sectional view of an environmentally friendly composite reinforced soil structure according to the present application. Fig. 2 Figure 2 is a cross-sectional view of a flexible ecological grid of an environmentally friendly composite reinforced soil structure according to the present application.

[0019] Wherein: 1, back soil body; 2, flexible ecological grid; 21, ecological outer layer; 22, fertilizer layer; 3, ecological bag; 4, preservative anti-skid pile. DETAILED DESCRIPTION

[0020] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application are further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the embodiments of the present application and should not be used to limit the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application. The examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout.

[0021] It should be noted that the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or server comprising a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0022] Similar reference signs and letters in the following drawings represent similar items, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0023] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0024] In the description of the present application, it should also be noted that unless otherwise explicitly specified and limited, the terms "providing", "installing", "connecting" should be understood broadly, for example, it can be fixedly connected, or detachably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between the two elements inside. For those of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0025] As Figs. 1-2As shown, an environmentally friendly composite reinforced soil structure includes a back soil body 1, ecological bags 3 arranged in steps at the front end of the back soil body 1, and preservative anti-skid wood piles 4 arranged at the bottom end of the back soil body 1. The ecological bags 3 are wrapped by flexible ecological grating 2, and both ends of the flexible ecological grating 2 extend into the inside of the back soil body 1. The top end of the ecological bag 3 is sprayed with seeds. The flexible ecological grating 2 is woven by flexible ecological ropes, and the flexible ecological ropes include a fertilizer layer 22 and an ecological outer layer 21 arranged in turn from inside to outside, so as to provide nutrients required by plant roots. The ecological outer layer 21 is a hollow cylindrical structure wound by multiple ecological belts, and adjacent two ecological bags 3 are adhered by ecological glue.

[0026] The material of the ecological belt is polylactic acid, polyhydroxyalkanoate, bamboo fiber, bamboo charcoal fiber, coconut shell fiber, or biodegradable plastic-based composite material. The biodegradable plastic-based composite material includes a biodegradable polymer matrix, reinforcing fibers, a plasticizer, a bioactive additive, an antioxidant, and an ultraviolet stabilizer. The biodegradable polymer matrix is polylactic acid, polybutylene succinate, or polyhydroxyaliphatic acid ester, and the reinforcing fibers are wood fibers or hemp fibers. The ecological glue is starch-based glue, polylactic acid glue, or rubber glue.

[0027] The ecological bag 3 includes a bag body woven by natural fibers and organic soil, water-retaining agents, and fertilizers filled in the bag body. The natural fibers are wool.

[0028] The preservative anti-skid wood pile 4 is an oak, a jackwood, or a black walnut treated by preservative treatment.

[0029] The construction method of the environmentally friendly composite reinforced soil structure includes the following steps: S1, driving the preservative anti-skid wood pile 4 into the ground by using a vibration pile driving method; In step S1, the preservative anti-skid wood pile 4 is obtained by coating a preservative, a coating, or performing heat treatment or oil injection treatment on the outer surface of the oak, the jackwood, or the black walnut. The preservative is coal tar, petroleum, or coal tar pitch, and the coating is paint or oil.

[0030] S2, placing the flexible ecological grating 2 and the bottommost ecological bag 3 in turn close to the back of the preservative anti-skid wood pile 4, and making both ends of the flexible ecological grating 2 extend out of the bottommost ecological bag 3; S3, filling and compacting the soil corresponding to the bottommost ecological bag 3, and making the compacted soil layer flush with the top end of the bottommost ecological bag 3; S4, wrapping the flexible ecological grating 2, so that the flexible ecological grating 2 wraps the bottommost ecological bag 3; S5, repeating steps S2-S4 to stack the ecological bags 3 from bottom to top in turn until the construction is completed.

[0031] Therefore, the application adopts the above-mentioned environment-friendly composite reinforced soil structure and construction method, and through the use of the degradable ecological bag combined with the flexible ecological grid, the plant root system and the flexible ecological grid can be used to stabilize the soil layer during the service period, and can be degraded after the service period, which is more environmentally friendly and beautiful.

[0032] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application and not to limit them. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can still be modified or replaced by equivalents, and these modifications or replacements cannot make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present application.

Claims

1. An environmentally friendly composite reinforced soil structure, characterized in that: It includes the back soil, the ecological bags arranged in a stepped manner at the front end of the back soil, and the anti-corrosion and anti-slip wooden piles set at the bottom of the back soil. The ecological bags are wrapped by a flexible ecological grid, and both ends of the flexible ecological grid extend into the interior of the back soil. Seeds were sprayed onto the top of the eco-bags.

2. The environmentally friendly composite reinforced soil structure according to claim 1, characterized in that: The flexible ecological grid is woven from flexible ecological ropes. The flexible ecological ropes include fertilizer layers and ecological outer layers arranged sequentially from the inside out. The ecological outer layer is a hollow cylindrical structure made of multiple layers of ecological strips. Adjacent ecological bags are bonded together with ecological adhesive.

3. The environmentally friendly composite reinforced soil structure according to claim 2, characterized in that: The materials used in the ecological belt are polylactic acid, polyhydroxyalkanoate, bamboo fiber, bamboo charcoal fiber, coconut shell fiber, or biodegradable plastic-based composite materials.

4. The environmentally friendly composite reinforced soil structure according to claim 3, characterized in that: Biodegradable plastic matrix composites include a biodegradable polymer matrix, reinforcing fibers, plasticizers, bioactive additives, antioxidants, and UV stabilizers. The biodegradable polymer matrix is ​​polylactic acid, polybutylene succinate, or polyhydroxyalkanoate, and the reinforcing fibers are wood fibers or hemp fibers.

5. The environmentally friendly composite reinforced soil structure according to claim 2, characterized in that: Ecological adhesives are starch-based adhesives, polylactic acid adhesives, or rubber adhesives.

6. The environmentally friendly composite reinforced soil structure according to claim 1, characterized in that: An eco-bag consists of a bag body woven from natural fibers and organic soil, water-retaining agents, and fertilizers filled inside the bag, with wool being the natural fiber.

7. The environmentally friendly composite reinforced soil structure according to claim 1, characterized in that: The anti-corrosion and anti-slip wooden stakes are made of oak, teak, or black walnut wood that has undergone anti-corrosion treatment.

8. A construction method for an environmentally friendly composite reinforced soil structure as described in any one of claims 1-7, characterized in that: Includes the following steps: S1. Use vibratory pile driving method to drive anti-corrosion and anti-slip wooden piles into the ground; S2. Place the flexible ecological grid and the bottom ecological bag in sequence on the back of the anti-corrosion and anti-slip wooden pile, so that both ends of the flexible ecological grid extend out of the bottom ecological bag. S3, Layered soil filling: Fill and compact the soil corresponding to the bottommost ecological bag, and make the compacted soil layer flush with the top of the bottommost ecological bag. S4, Reverse-wrapped flexible ecological grid, which allows the flexible ecological grid to wrap around the bottommost ecological bag; S5. Repeat steps S2-S4, stacking the eco-bags from bottom to top until construction is complete.

9. The construction method of an environmentally friendly composite reinforced soil structure according to claim 8, characterized in that: In step S1, the outer surface of oak, teak, or black walnut is coated with a preservative, a coating, or subjected to heat treatment or oil injection to obtain a corrosion-resistant and anti-slip wooden stake. The preservative is coal tar, petroleum, or coal tar pitch, and the coating is paint or oil.

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