Ecological slope protection technical system based on bamboo frame and construction method

Abstract

The invention discloses an ecological slope protection technical system based on a bamboo-wood frame and a construction method, the technical system mainly comprises a bamboo-wood ecological frame and a green and convenient construction method, and therefore the dual purposes of rapid protection and ecological restoration of a side slope are achieved. Bamboo and wood material units are adopted to be used for a frame main body structure, a frame meeting the design requirement form is spliced on site, joints are connected through metal connecting pieces and fixed through twisted steel anchor nails with one ends in a U shape, and ecological restoration is conducted on engineering wounds in cooperation with the grass planting technology. The bamboo frame can play a certain role in hooping the soil body, water and soil loss on the surface of the soil layer under rainfall, construction and other factors is prevented, the safety of the temporary side slope is effectively improved, the production cost is reduced, and the effect of regreening of the side slope is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of civil engineering and ecological restoration, in particular to an ecological slope protection technical system based on a bamboo-wood frame and a construction method. Background Art

[0002] With the rapid development of modern society, human dependence on and destruction of the natural environment have become increasingly serious, and the concept of ecology has gradually received widespread attention. In the field of civil engineering, concrete frame beams and concrete arch skeletons are currently used as the main means of slope protection. However, this traditional protection method is not only complex and costly to construct, but also contrary to the concept of green restoration of ecological slopes. Although the concrete structure is strong, it lacks ecological adaptability and cannot provide a good growth environment for plants, resulting in difficulty in vegetation coverage and slow ecological recovery. In this context, it is particularly important to seek more eco-friendly slope protection and restoration methods to achieve the harmonious coexistence of slope stability and ecology. The ecological slope restoration technology system aims to use ecological materials as the main structure, combined with slope grass planting technology, to form an ecological slope restoration technology with simple construction and low cost, so as to achieve the dual goals of slope stability and greening.

[0003] Bamboo and wood are natural materials with low production costs and no pollution. The bamboo and wood frame is also a green and environmentally friendly structural system. The material not only has carbon sequestration properties, but also reduces carbon emissions during the assembly process. The main component of wood is cellulose. When wood decays, it can be decomposed by microorganisms in the soil to form soil organic matter, which further promotes the growth of plant roots.

[0004] Therefore, the present invention proposes an ecological slope protection technology system and construction method based on bamboo-wood frame, especially innovatively generalizes the method of calculating soil pressure in soil mechanics, and combines material mechanics to propose an algorithm for calculating the strength of the bamboo and wood material units used based on the slope gradient, the inclination angle between the bamboo-wood frame and the vertical line, the weight and internal friction angle of the backfill in the bamboo-wood frame, and the friction angle between the bamboo-wood frame and the backfill, aiming to combine material science and ecological restoration technology to develop a new slope restoration technology that conforms to the concept of sustainable development. In this technical system, the main structure of the bamboo-wood frame is the bamboo and wood material unit; during construction, the slope is cleared on the premise that the slope meets the safety requirements to keep the slope flatness consistent, and the bamboo and wood material units are used on site, cut into 80-400mm wide strips along the length of the material, and the cut components are assembled into a frame according to the designed shape, wherein angle brackets and self-tapping screws are used at the nodes for connection. Put the assembled frame on the slope, use anchor nails to fix the frame, and check whether the frame is loose after fixing. Before protecting plants in the frame, the soil must be prepared. The soil should be mixed with fertilizer to provide fertility for the plants. Fill the soil mixed with fertilizer into the frame, and evenly spread the mixed seeds on the surface of the soil. If conditions permit, you can use a spike rake to turn the seeds 2 to 3 cm below the surface soil to prevent the seeds from being washed away by water. Finally, water the plant seeds and cover them with a shade net to prevent rapid evaporation of water.

[0005] The entire content and process of this technical system are low-cost, fast and green. The research and development and application of this technology provide strong support for the rapid recovery of slope ecological functions and the sustainable development of the ecological environment. Summary of the invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the purpose of the present invention is to propose an ecological slope protection technology system and construction method based on a bamboo-wood frame. The technical system mainly includes bamboo and wood material units as the main structure of the bamboo-wood frame and an innovative method of grass planting technology. The slope repair technology system can not only achieve slope protection, but also promote rapid greening of the slope, and has important practical significance and application value.

[0007] The bamboo-wood frame uses bamboo and wood material units as the base material and is assembled on site according to the design requirements. The nodes are connected using angle brackets and self-tapping screws, and the bamboo-wood frame is fixed on the slope using anchor nails. The bamboo-wood frame can play a certain hoop role on the soil, preventing soil erosion on the surface of the soil layer due to rainfall, construction and other factors. In addition, by filling the bamboo-wood frame with soil mixed with fertilizer and combining it with grass planting technology, not only can the slope be quickly regreened, but the roots of the plants can also extend into the soil to help stabilize the slope.

[0008] The following is an algorithm for calculating the strength that the bamboo and wood material units should have:

[0009] Ignoring the flexural deformation of the bamboo-wood frame, the bamboo-wood frame is regarded as a rigid retaining wall that can only translate or rotate. If the slope is β, the friction angle between the fill and the bamboo-wood frame is δ, the weight of the fill in the bamboo-wood frame is γ, and the internal friction angle of the fill is The inclination angle between the bamboo frame and the vertical line is α. In the present invention, α=β, and the total pressure of the fill on the bamboo frame is E a ,but:

[0010]

[0011] in

[0012]

[0013] H = fill thickness × cosα

[0014] Simplify the slat into a simply supported beam with thickness b and width (height) h. Then the force acting on the simply supported beam is F = frame spacing × E a , the action point is located at the mid-span of the simply supported beam. The maximum shear force is Maximum bending moment Then the maximum normal stress σ on the simply supported beam section is max The following formula should be used to obtain

[0015]

[0016] Where W z is the bending section coefficient, for this simply supported beam, Maximum shear stress τ max The following formula should be used to obtain

[0017]

[0018] Where A is the cross-sectional area of ​​the simply supported beam. For this simply supported beam, A=bh.

[0019] Assuming the allowable normal bending stress of the simply supported beam is [σ] and the allowable shear stress is [τ], then we have

[0020] σ max ≤[σ]

[0021] τ max ≤[τ]

[0022] According to some embodiments of the present invention, the slope is a stable slope with a slope gradient less than 40°, such as the slope gradient may be 10°, 20°, 30°, etc.

[0023] According to some embodiments of the present invention, the bamboo-wood frame is assembled on site using bamboo and wood material units in the form of design requirements, and the assembled frame spacing is 500-2000mm, such as the frame spacing can be 600mm, 800mm, 1000mm, etc.

[0024] According to some embodiments of the present invention, the main structure of the bamboo and wood frame is composed of bamboo and wood material units, the thickness of the material is 10-20mm, such as 12mm, 14mm, 16mm, etc.; the width of the material is 80-400mm, such as 100mm, 200mm, 300mm, etc.

[0025] According to some embodiments of the present invention, the anchor has a diameter of 8-12 mm, such as 9 mm, 10 mm, 11 mm, etc.; and a length of 600-1500 mm, such as 700 mm, 800 mm, 900 mm, etc.

[0026] According to some embodiments of the present invention, the plant protection may be mixed with local native plant species, such as bluegrass, ryegrass, Elymus salsa, Sweet Clover, Amorpha fruticosa, and the like.

[0027] According to some embodiments of the present invention, the thickness of the soil filled into the bamboo-wood frame is 50-100 mm, such as 60 mm, 70 mm, 80 mm, etc.

[0028] According to some embodiments of the present invention, the weight of the fill soil filled into the bamboo frame is 17-20 kN / m 3 , such as 17kN / m 3 、18kN / m 3 , 19kN / m 3 etc.; the internal friction angle is 26-48°, such as 26°, 30°, 40°, etc.

[0029] According to some embodiments of the present invention, the friction angle between the fill and the bamboo frame is ×Internal friction angle of fill.

[0030] According to some embodiments of the present invention, the ecological slope restoration technology system can mix different materials and combinations, not limited to one.

[0031] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0033] Figure 1 a is a schematic diagram of an outer frame after being assembled according to an embodiment of the present invention;

[0034] Figure 1 b, c, and d are schematic diagrams of the process of assembling the inner frame according to an embodiment of the present invention;

[0035] Figure 1 Figures e and f are schematic diagrams of placing the assembled bamboo and wood frame on a cleared slope and inserting anchors to fix it, and then setting plant protection according to an embodiment of the present invention;

[0036] Figure 2 is a schematic diagram of setting plant protection between bamboo and wood frames according to an embodiment of the present invention;

[0037] Reference numerals:

[0038] Anchor nails 11; angle codes 12; self-tapping screws 13; bamboo and wood material units 14; slope surface after clearing 15; plant protection 16. DETAILED DESCRIPTION

[0039] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0040] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] An ecological slope protection technology system and construction method based on a bamboo-wood frame according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0043] like Figure 1 As shown in a, b, c, and d, the bamboo-wood frame is assembled step by step using bamboo and wood material units. Figure 1 As shown in Figures e and f, the assembled bamboo frame is placed on the slope and anchors are inserted into the nodes to fix it. Figure 2 As shown, plant protection is set between the fixed bamboo and wood frames. Finally, cover the bamboo and wood frames with a sunshade net. An ecological slope protection technology system and construction method based on bamboo and wood frames include: anchors 11, angle codes 12, self-tapping screws 13, bamboo and wood material units 14, a cleared slope surface 15, and plant protection 16. Among them, the bamboo and wood frames are assembled and connected by bamboo and wood material units 14, the nodes are connected by angle codes 12 and self-tapping screws 13, and then fixed on the slope surface by anchors 11. Thereafter, cover the bamboo and wood frames with soil, sow plant seeds and water for plant protection 16, and finally cover the bamboo and wood frames with a sunshade net.

[0044] The slope described in the present invention is a stable slope with a slope gradient less than 40°, and the slope gradient may be 10°, 20°, or 30°.

[0045] like Figure 1 As shown in a, the node is connected through an angle code 12 and a self-tapping screw 13.

[0046] The size of the frame spacing can be 600mm, 800mm, 1000mm, and bamboo and wood material units 14 of different widths and thicknesses can be selected to assemble the bamboo and wood frames according to the engineering needs. Among them, the thickness of the bamboo and wood material unit 14 can be 12mm, 14mm, 16mm. The width (height) of the bamboo and wood material unit 14 can be 100mm, 200mm, 300mm.

[0047] The diameter of the anchor nail 11 for fixing the bamboo frame can be 9mm, 10mm, 11mm; the length can be 700mm, 800mm, 900mm.

[0048] The plant species used in the optional plant protection 16 include bluegrass, ryegrass, Elymus tinctorius, Sweet Clover, Amorpha fruticosa, etc.

[0049] During construction, the slope is cleared on the premise that the slope meets the safety requirements to keep the slope flatness consistent. Bamboo and wood material units 14 are used on site to assemble the bamboo and wood frames. The strength of the bamboo and wood material units 14 is determined according to the algorithm proposed in the present invention, based on the thickness, weight, internal friction angle, and internal friction angle between the fill and the bamboo and wood frames of the soil to be filled between the bamboo and wood frames. The boards are cut into 100mm, 200mm or 300mm wide strips along the length direction, and the cut boards are assembled into bamboo and wood frames in the form required by the design. Angle codes 12 and self-tapping screws 13 are used for connection at the nodes. After fixing the bamboo and wood frames with anchor nails 11, check whether the bamboo and wood frames are loose. Before performing plant protection 16 in the bamboo and wood frames, the soil must be prepared, and the weight of the soil can be 17kN / m 3 、18kN / m 3 , 19kN / m 3 ; The internal friction angle can be 26°, 30°, 40°, and the friction angle between the soil and the bamboo frame is × Fill soil internal friction angle, the thickness of the filled soil can be 60mm, 70mm, 80mm, after the soil is mixed with an appropriate amount of fertilizer, fill the soil between the bamboo and wooden frames. Evenly spread the mixed seeds on the surface of the soil. If conditions permit, you can use a spike rake to properly turn the seeds and sow them 2 to 3 cm below the surface soil to prevent the seeds from being washed away by water. Finally, after pouring an appropriate amount of water on the surface of the soil, use a shade net to cover the bamboo and wooden frame to reduce water evaporation.

[0050] Refer to the following Figure 1-2 An ecological slope protection technology system and a construction method based on a bamboo-wood frame according to multiple embodiments of the present invention are described.

[0051] Embodiment 1:

[0052] Reference Figure 1 to Figure 2 In this embodiment, an ecological slope protection technology system and construction method based on a bamboo-wood frame includes anchor nails 11, angle codes 12, self-tapping screws 13, bamboo and wood material units 14, a cleared slope surface 15, and plant protection 16.

[0053] The slope of the slope is 10°, the inclination angle between the bamboo and wood frames and the vertical line is 10°, and the distance between the bamboo and wood frames is 600 mm. The width (height) of the selected bamboo and wood material unit 14 is 100 mm and the thickness is 12 mm. The weight of the soil filled between the bamboo and wood frames is 18 kN / m 3 , the internal friction angle is 26°, and the friction angle between the soil and the bamboo frame is × fill soil internal friction angle is determined to be 9°, and the thickness of the filled soil is 60 mm. According to the algorithm proposed in the present invention, the strength of the bamboo and wood material unit 14 should be [σ] ≥ 0.72 MPa, [τ] ≥ 6×10 -3 MPa.

[0054] When in use, a bamboo and wood material unit 14 with a thickness of 12 mm is used on site, and is cut into 100 mm slats along the length direction of the board. The cut slats are assembled into a bamboo and wood frame with a frame spacing of 600 mm, and are connected at the nodes using angle codes 12 and self-tapping screws 13. The assembled bamboo and wood frame is placed on the slope surface that has been cleared, and then the anchor nails 11 are inserted into the soil at the nodes to fix the bamboo and wood frame, and the bamboo and wood frame is checked for looseness. 60 mm of soil prepared in advance is filled between the bamboo and wood frames, and the mixed seeds are fully and evenly spread on the surface of the soil. If conditions permit, use a nail rake to properly turn over and sow the seeds 2 to 3 cm below the surface soil to prevent the seeds from being washed away by water. Finally, after pouring an appropriate amount of water on the soil surface, a sunshade net is used to cover the bamboo and wood frame to reduce water evaporation.

[0055] In an ecological slope protection technology system and construction method based on a bamboo-wood frame, the presence of the bamboo-wood frame can play a certain framing and hooping role on the soil, preventing the soil surface from being eroded by other factors such as rainfall and construction. At the same time, the presence of plant protection 16 can not only achieve rapid greening of the slope, but the roots of the plants extend into the soil, which can also fix the soil and help stabilize the slope. From materials to structures, this embodiment is designed based on the principles of green, low-carbon, and sustainable development, which conforms to the development concept of ecological civilization. While ensuring the stability of the slope surface, it also promotes the ecological restoration of the slope, and has important practical significance and application value.

[0056] Embodiment 2:

[0057] Reference Figure 1 to Figure 2 In this embodiment, an ecological slope protection technology system and construction method based on a bamboo-wood frame may include anchor nails 11, angle codes 12, self-tapping screws 13, bamboo and wood material units 14, a cleared slope surface 15, and plant protection 16.

[0058] The slope of the slope is 20°, the inclination angle between the bamboo and wood frames and the vertical line is 20°, and the distance between the bamboo and wood frames is 800mm. The width (height) of the selected bamboo and wood material unit 14 is 200mm and the thickness is 14mm. The weight of the soil filled between the bamboo and wood frames is 19kN / m 3 , the internal friction angle is 30°, and the friction angle between the soil and the bamboo frame is × fill soil internal friction angle is determined to be 20°, and the thickness of the filled soil is 80 mm. According to the algorithm proposed in the present invention, the strength of the bamboo and wood material unit 14 should be [σ] ≥ 0.33 MPa, [τ] ≥ 8.1×10 -3 MPa.

[0059] When in use, a bamboo and wood material unit 14 with a thickness of 14 mm is used on site, and is cut into 200 mm slats along the length direction of the board. The cut slats are assembled into a bamboo and wood frame with a frame spacing of 800 mm, and are connected at the nodes using angle codes 12 and self-tapping screws 13. The assembled bamboo and wood frame is placed on the slope surface that has been cleared, and then the anchor nails 11 are inserted into the soil at the nodes to fix the bamboo and wood frame, and the bamboo and wood frame is checked for looseness. 80 mm of soil prepared in advance is filled between the bamboo and wood frames, and the mixed seeds are fully and evenly spread on the surface of the soil. If conditions permit, use a nail rake to properly turn over and sow the seeds 2 to 3 cm below the surface soil to prevent the seeds from being washed away by water. Finally, after pouring an appropriate amount of water on the soil surface, a sunshade net is used to cover the bamboo and wood frame to reduce water evaporation.

[0060] In an ecological slope protection technology system and construction method based on a bamboo-wood frame, the presence of the bamboo-wood frame can play a certain framing and hooping role on the soil, preventing the soil surface from being eroded by other factors such as rainfall and construction. At the same time, the presence of plant protection 16 can not only achieve rapid greening of the slope, but the roots of the plants extend into the soil, which can also fix the soil and help stabilize the slope. From materials to structures, this embodiment is designed based on the principles of green, low-carbon, and sustainable development, which conforms to the development concept of ecological civilization. While ensuring the stability of the slope surface, it also promotes the ecological restoration of the slope, and has important practical significance and application value.

Claims

1. An ecological slope protection technology system and construction method based on bamboo-wood frame, characterized in that Bamboo and wood ecological framework and green and convenient construction methods, including: Bamboo-wood frame, the main structure of the frame is bamboo or wood material units, which can be pure bamboo wood, or plywood processed from bamboo or wood, reconstituted bamboo and other engineering materials; The bamboo-wood frame uses bamboo and wood as engineering materials, which are assembled on site according to the design requirements. Corner blocks and self-tapping screws are used for node connection, and anchors are used to fix them on the slope. Plant protection is set between the bamboo-wood frames. The strength of the bamboo and wood material units used in the bamboo and wood frame is calculated according to the algorithm proposed by the present invention based on the slope gradient, the inclination angle between the bamboo and wood frame and the vertical line, the weight and internal friction angle of the fill in the bamboo and wood frame, and the friction angle between the bamboo and wood frame and the fill.

2. The ecological slope protection technology system and construction method based on bamboo-wood frame according to claim 1 is characterized in that: The slope is a stable slope with a slope of less than 40°.

3. The ecological slope protection technology system and construction method based on bamboo-wood frame according to claim 1 is characterized in that: The frame is assembled on site using bamboo and wood material units in accordance with design requirements, and the spacing between the assembled frames is 500-2000mm.

4. The ecological slope protection technology system and construction method based on bamboo-wood frame according to claim 3 is characterized in that: The bamboo and wood material units may have a thickness of 10-20 mm and a width of 80-400 mm.

5. The ecological slope protection technology system and construction method based on bamboo-wood frame according to claim 1 is characterized in that: The anchor is a U-shaped threaded steel bar at one end, with a diameter of 8-12mm and a length of 600-1500mm.

6. The ecological slope protection technology system and construction method based on bamboo-wood frame according to claim 1 is characterized in that: The plant protection can be mixed with local native plant species, such as bluegrass, ryegrass, Elymus salsa, Sweet Clover, Amorpha fruticosa, etc.

7. The ecological slope protection technology system and construction method based on bamboo-wood frame according to claim 1 is characterized in that: The plant protection described above requires that the soil be prepared in advance. The soil should be mixed with fertilizers that provide fertility for the plants, and the soil is filled into the bamboo and wood frame as fill soil, with a fill soil thickness of 50-100 mm.

8. The ecological slope protection technology system and construction method based on bamboo-wood frame according to claim 7 is characterized in that: The fill weight is 17-20kN / m 3 , the internal friction angle is 26-48°.

9. The ecological slope protection technology system and construction method based on bamboo-wood frame according to claim 7 is characterized in that: The friction angle between the fill and the bamboo frame is ×(internal friction angle of fill).

10. An ecological slope protection technology system and construction method based on bamboo-wood frame according to claims 1-9, characterized in that: The ecological slope restoration technology system can mix different materials and combinations, not limited to one.

Images