A three-dimensional ecological bag slope protection structure

Abstract

The present application provides a three-dimensional eco-bag slope protection structure, which includes: a concrete foundation block arranged at the foot of the slope; and a four-way triangular geogrid arranged at the rear side of the concrete foundation block; and an eco-bag fixed above each layer of the four-way triangular geogrid and arranged in a stepped manner; the four-way triangular geogrid is arranged in a trapezoidal shape from the foot of the slope to the top of the slope, and the front end of the four-way triangular geogrid is provided with an extension extending to the outside of the slope surface, the extension is upwardly wrapped on the eco-bag and connected to the four-way triangular geogrid below the eco-bag through a connecting rod, and the four-way triangular geogrid is fixed by a U-shaped steel bar after being tensioned in the horizontal plane; the eco-bag contains: a non-woven blanket, a grass grid, a filler, and a plant bag filled in the grass grid, and the plant bag is filled with soil and plant seeds with developed root systems. The technical solution of the present application can improve the overall stability of the slope and achieve the effect of beautifying the urban landscape.

Description

Technical Field

[0001] The present application belongs to the technical field of slope support, and in particular to a three-dimensional eco-bag slope protection structure. Background Art

[0002] At present, slope support structures mostly use rigid or semi-rigid support methods such as concrete lattice beams combined with anchor cables, anchor rods or gravity retaining walls. Not only are the project costs high and the construction difficult, but they are also prone to hollowing due to long-term water erosion, posing safety hazards. At the same time, the exposed concrete structure does not meet the requirements of modern cities for urban landscapes.

[0003] Therefore, designing a new type of slope support structure has very significant practical significance. Summary of the invention

[0004] The present application provides a three-dimensional eco-bag slope protection structure, which can improve the overall stability of the slope and achieve the effect of beautifying the urban landscape.

[0005] The present application is implemented as follows: a three-dimensional eco-bag slope protection structure, comprising:

[0006] Concrete foundation blocks set at the toe of the slope;

[0007] and, a four-way triangular geogrid disposed on the rear side of the concrete foundation block;

[0008] and, eco-bags fixed on top of each layer of four-way triangular geogrids and arranged in a stepped pattern;

[0009] The four-way triangular geogrid is arranged in a trapezoidal shape from the foot of the slope to the top of the slope. The front end of the four-way triangular geogrid is provided with an extension extending to the outside of the slope surface. The extension is wrapped upward on the eco-bag and connected to the four-way triangular geogrid below the eco-bag through a connecting rod. The four-way triangular geogrid is fixed by a U-shaped steel bar after being tensioned on the horizontal plane.

[0010] The ecological bag contains: a non-woven blanket, a grass grid, a filling material and a plant bag filled in the grass grid, wherein the plant bag is filled with soil and plant seeds with developed root systems.

[0011] Optionally, adjacent eco-bags are fixed to each other using three-dimensional drainage coupling buckles.

[0012] Optionally, an impermeable membrane is laid below the top-pressing eco-bag, wherein the top-pressing eco-bag is an eco-bag fixed on the top of the slope.

[0013] Optionally, the filling material is a mixture of gravel soil, sandy soil and crushed stone soil.

[0014] Optionally, the cross-sectional shape of the concrete foundation block is L-shaped, and a drainage pipe is provided between the raised portion of the concrete foundation block and the transverse portion of the concrete foundation block.

[0015] Optionally, a drainage pipe is provided on each slope surface of the slope.

[0016] Optionally, the above three-dimensional eco-bag slope protection structure also includes: drainage ditches arranged at the top and foot of the slope.

[0017] It can be seen from the above technical solution that in this application, the technical solution is to build non-woven blankets and grass grids into the eco-bags, and the grass grids are used to place the plant bags. The non-woven blankets and grass grids are conducive to strengthening the local strength of the eco-bags. The use of plant bags is conducive to saving fertilizers and seeds, and can prevent seeds from being pecked by birds, accelerate the growth of vegetation, and achieve the effect of beautifying the urban landscape. In addition, by setting a four-way triangular geogrid on each layer of the slope and setting an eco-bag on the four-way triangular geogrid, and at the same time setting a four-way triangular geogrid on each layer of the slope to strengthen the overall stability of the slope. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the eco-slope structure provided for this application;

[0019] Figure 2 A schematic diagram of a local structure provided in the present application that is connected to the extension of the upper four-way triangular geogrid through a connecting rod;

[0020] Figure 3 A schematic diagram of the local structure of the four-way triangular geogrid provided for this application, which is fixed by U-shaped steel bars after being tensioned in the horizontal plane;

[0021] Figure 4 Schematic diagram of the eco-bag structure provided for this application;

[0022] Figures 5 to 7 Schematic diagram of the eco-bag laying provided for this application;

[0023] Figure 8 Schematic diagram of the concrete foundation block structure provided for this application. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solution and beneficial effects of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0025] See also Figure 1 The schematic diagram of the ecological slope structure shown in the figure, a three-dimensional ecological bag slope protection structure provided by the present application includes:

[0026] A concrete foundation block 1 is arranged at the foot of the slope;

[0027] and, a four-way triangular geogrid 2 disposed at the rear side of the concrete foundation block 1;

[0028] and, eco-bags 3 fixed on top of each layer of four-way triangular geogrid and arranged in a ladder shape;

[0029] The four-way triangular geogrid 2 is arranged in a trapezoidal shape from the foot of the slope to the top of the slope. The front end of the four-way triangular geogrid 2 is provided with an extension portion 21 extending to the outside of the slope surface. The extension portion 21 is upwardly wrapped on the eco-bag 3 and is connected to the four-way triangular geogrid below the eco-bag through a connecting rod 22. Figure 2 The figure shows a partial structural diagram of the extension 21 connected to the four-way triangular geogrid 2 below the eco-bag through the connecting rod 22. Figure 3 As shown, the four-way triangular geogrid is fixed by U-shaped steel bars 24 after being tensioned in the horizontal plane.

[0030] like Figure 4 As shown, the eco-bag 3 includes: a non-woven blanket 31, a grass grid 32, a filler (not shown in the figure) and a plant bag (not shown in the figure) filled in the grass grid, and the plant bag is filled with soil and plant seeds with developed root systems so as to plant green plants 6. Specifically, the other spaces in the eco-bag except the grass grid are densely filled with fillers, and the fillers can be a mixture of gravel soil, sandy soil, and crushed stone soil. If the filler is an impermeable material, a sand bag (or a drainage belt) is filled every first distance (for example, 4 square meters) on the slope surface to ensure smooth drainage.

[0031] Optional, such as Figure 1 As shown, adjacent eco-bags are fixed to each other by three-dimensional drainage buckles 4, that is, adjacent eco-bags are connected to each other by three-dimensional drainage buckles to form a stable triangular internal friction locking structure. The steps of stacking eco-bags 3 may include: first placing the bottom slope layer eco-bags (such as Figure 5 Then, a three-dimensional drainage connection buckle is used to cross adjacent eco-bags to fix adjacent eco-bags (as shown in FIG. Figure 6 Then, place the eco-bags on the upper slope and fix the upper and lower adjacent eco-bags with three-dimensional drainage buckles (as shown in Figure 7 As shown in the figure, the eco-bags are repeatedly set up on the entire slope to form a stepped arrangement of eco-bags.

[0032] Optionally, an impermeable membrane is laid under the top-pressing eco-bag to prevent surface water from seeping into the slope, wherein the top-pressing eco-bag is an eco-bag fixed on the top of the slope.

[0033] Optional, such as Figure 8As shown in the schematic diagram of the concrete foundation block, the cross-sectional shape of the concrete foundation block is L-shaped, and a drainage pipe 13 is provided between the raised portion 11 of the concrete foundation block and the transverse portion 12 of the concrete foundation block.

[0034] Optionally, a drainage pipe is provided on each layer of the slope. The drainage pipe is inserted into the slope at the location where the eco-bags are piled. Specifically, the drainage pipe can be a PVC pipe with a length of not less than 0.7 meters, and the end of the drainage pipe is wrapped with an anti-filtration membrane to prevent soil erosion.

[0035] Optional, such as Figure 1 As shown, the above three-dimensional eco-bag slope protection structure also includes: drainage ditches 5 arranged at the top and foot of the slope.

[0036] The following is an explanation of the construction process of the three-dimensional eco-bag slope protection structure:

[0037] 1. Measurement and Stakeout

[0038] 1. After the slope bottom site is leveled, a professional layout team is organized. According to the slope coordinates and the known coordinates in the red line map, control points are arranged at the proposed site according to their relationship. Then, according to the size and angle of the connecting lines and the axes in the drawings, each vertical and horizontal column is precisely measured. Permanent control piles are made according to regulations, and the measurement accuracy of the grid control network is checked and calculated. After the axis and point positions are completed, they can be used only after verification by the relevant units.

[0039] 2. Party A shall lead the absolute elevation control point to the construction site and make elevation control points at the construction site. The theodolite, level and steel ruler used shall be inspected and calibrated to the specified deviation range before use. When measuring the fixed point, the measurement closing error and distance measurement error shall be controlled within the allowable range of the specification.

[0040] 2. Laying of gravel cushion

[0041] Before laying the gravel cushion, the base should be leveled and watered, and the virtual paving thickness can be set to 230-240 mm (depending on the construction site). After paving, start sprinkling water (the surface of the gravel should be evenly moistened with a moisture content of 8-12%), and then use a roller to roll and level it.

[0042] 3. Construction of concrete foundation blocks at the foot of the slope

[0043] Please refer to Figure 8 As shown, the raised part of the concrete foundation block is used to fix the bottom ecological bag, and a PVC pipe can be pre-buried at the raised part as a drain pipe. Further, a telescopic device for settlement can be set on the mixed foundation block at a second distance (for example, 10 meters), and asphalt hemp can be filled in the seam. The strength grade of the concrete foundation block is not less than C20 and the total length of the concrete foundation block is greater than the length of the slope.

[0044] The construction of concrete foundation blocks strictly complies with the relevant requirements of "Code for Design of Concrete Structures" GB50010 and "Code for Design of Building Foundations" GB50007.

[0045] 4. Prepare eco-bags

[0046] 1. The eco-bag must be UV-resistant, acid-resistant, and water-permeable but not soil-permeable. At the same time, the plant roots can freely penetrate and grow rapidly. The tie belt must be UV-resistant and have a one-way self-locking structure. The materials of the eco-bag and tie belt must meet the relevant requirements of the Technical Specifications for the Application of Geosynthetics GB 50290.

[0047] 2. Use plant bags to wrap the seeds, fertilizers and soil of plants with well-developed root systems. The specific requirements of the plant varieties are selected and matched, and professional technical construction plans are provided by professional units with gardening qualifications. The material of the plant bags is the same as that of the ecological bags.

[0048] 3. Pre-cut the grass grid according to the size of the eco-bag, and fill the above-mentioned plant bags one by one in the grass grid. The filling density of the plant bags needs to be determined according to the professional technical construction plan. The filling range of the plant bag is the free growth end of the eco-bag. This range is calculated and determined based on factors such as the slope gradient and the size of the eco-bag. The overlap section of the upper and lower eco-bags may not be filled to prevent the stability of the upper eco-bag from being damaged by plant growth. The grass grid of the eco-bag used for the top of the slope is fully filled with plant bags.

[0049] 4. Fill the rest of the eco-bag with filling materials. First, use gravel soil, sand soil, and crushed stone soil with a certain grade. If the bag filling material is impermeable material, fill one sand bag (or set up drainage belt) for every 4 square meters of the wall to ensure smooth drainage. After filling, tie the tie belt, water it appropriately, and stack it on site for use.

[0050] 5. Laying four-way triangular geogrid

[0051] 1. First, cut out the four-way triangular geogrid, lay it in the specified position, and reserve the required length of the grid outside the slope, which should be no less than 1 meter. The four-way triangular geogrid can be made of unidirectional force-bearing materials, and the force direction is laid perpendicular to the slope, and adjacent four-way triangular geogrids are butt-jointed.

[0052] 2. Fill a certain amount of soil on the four-way triangular geogrid, tighten the four-way triangular geogrid through the other free end of the four-way triangular geogrid, press the fill soil on it or fix it with sandbags. Furthermore, you can also use U-shaped steel bars / wooden nails for temporary fixation. The U-shaped steel bars / wooden nails are arranged in a plum blossom shape with a horizontal and vertical spacing of 2 meters.

[0053] 6. Stacking eco-bags on slopes

[0054] 1. Stack the prepared eco-bags from the concrete foundation blocks at the foot of the slope. The eco-bags are butted parallel to the slope surface, and the upper and lower eco-bags are overlapped. Three-dimensional drainage connectors are used at the butt joints and overlaps to connect the eco-bags into a whole. At the steps of the slope sections and the top of the slope, the eco-bags are placed perpendicular to the slope surface in the long direction to form a top, and an impermeable membrane is laid under the top eco-bag to prevent surface water from seeping into the slope. The width of the impermeable membrane is not less than 1 meter and wider than the width of the steps of the slope sections. Water the eco-bags for pre-settlement every 2 meters of construction. The construction of the eco-bag stacking can refer to the above description and will not be repeated here.

[0055] 2. The material and environmental performance of the three-dimensional drainage coupling buckle are consistent with those of the eco-bag. The upper and lower surfaces of the three-dimensional drainage coupling buckle must have ratchets with barb characteristics. The ratchets are scientifically and reasonably distributed according to mechanical requirements. Any two ratchets are not on the same shear failure trajectory, so as to maximize the mechanical effect of each ratchets. It also has no less than 32 vertical holes that can meet the needs of plant growth and drainage. The diameter of each hole is greater than 15 mm, and the water permeable area of ​​the hole is not less than 45% of the total area of ​​the coupling buckle to meet the requirements of multi-directional drainage and plant root growth. Its two-way grooves and vertical holes are combined into an interlaced nonlinear rib structure, which forms an internal friction locking structure with the scientifically and reasonably distributed barb ratchets to meet the requirements of structural safety and stability.

[0056] 3. A PVC drainage pipe is set at every third distance (for example, 2 meters) on the slope. The drainage pipe is inserted into the slope at the place where the eco-bags are piled. The length of the drainage pipe is not less than 0.7 meters, and the end is wrapped with a filter membrane to prevent soil erosion.

[0057] 7. Filling, compaction and slope shaping

[0058] 1. Fill the soil layer by layer behind the eco-bag and roll it until the next layer of four-way triangular geogrid. Use mechanical equipment such as bucket excavators or bulldozers with buckets to carry out the filling construction. The purpose is to ensure that the filling soil is spread on the four-way triangular geogrid by dumping. To avoid damage to the four-way triangular geogrid during construction, a 150 mm thick filling layer is maintained between the mechanical crawler and the four-way triangular geogrid.

[0059] 2. When filling soil in layers, the thickness of one paving shall not be less than 200 mm. When paving by machine, the paving machine shall be no less than 2 meters away from the slope surface. Manual paving and rolling shall be applied within 2 meters from the slope surface, and the density shall reach 93%. In order to prevent the slope surface from tilting outwards due to soil pressure, paving shall be carried out from the end of the reinforcement far away from the slope surface toward the slope surface. The running direction of the machine shall be perpendicular to the reinforcement, and it shall not be driven or parked on the reinforcement that is not covered with soil.

[0060] 3. The layered fill slope should be gradually compacted as it is filled, and then the slope surface should be smoothed to facilitate the stacking of the next layer of eco-bags. The slope construction should be carried out simultaneously with the roadbed.

[0061] 4. Before a large amount of filling work is carried out, a compaction test section should be set up. The thickness of the filling layer and the number of rolling times should be determined according to the rolling machinery and the properties of the filling to guide the construction. Each layer of filling should be rolled in time after it is paved. The rolling is generally light first and then heavy. The compaction operation should start from the middle of the reinforcement and gradually move to the tail in parallel to the slope direction, and then roll in the direction of the slope (rolling in parallel to the reinforcement direction is strictly prohibited). When using clay for filling, drainage and covering measures should be taken during the rainy season.

[0062] 8. Four-way triangular geogrid reverse packaging and tensioning

[0063] 1. The four-way triangular geogrid reinforcement layer spacing should be the same, no more than 0.5m, and in multiples of the height of a single eco-bag. When the four-way triangular geogrid is used to wrap the eco-bag, the wrapping grid is laid on the fill soil, cut and position the four-way triangular geogrid as required (and reserve the next layer of wrapping length), and this layer of four-way triangular geogrid is connected to the wrapping grid with a connecting rod / belt.

[0064] 2. Use the tensioning beam to hook the end of the four-way triangular geogrid and apply tension to it, tighten the connection between the four-way triangular geogrids and tighten the reverse grid on the structural surface below. While maintaining the tension of the four-way triangular geogrid, fill a layer of backfill on the four-way triangular geogrid to ensure that the four-way triangular geogrid will not shrink after the tensioning beam is removed. After the backfill is completed, release the tension and remove the tensioning beam.

[0065] IX. Construction of supporting facilities

[0066] Drainage ditches shall be constructed within 1m of the top and foot of the slope, and the cross-sectional dimensions of the drainage ditches shall not be less than 0.5×0.5 meters.

[0067] It can be seen from the above technical solution that in this application, the technical solution is to build non-woven blankets and grass grids into the eco-bags, and the grass grids are used to place the plant bags. The non-woven blankets and grass grids are conducive to strengthening the local strength of the eco-bags. The use of plant bags is conducive to saving fertilizers and seeds, and can prevent seeds from being pecked by birds, accelerate the growth of vegetation, and achieve the effect of beautifying the urban landscape. In addition, by setting a four-way triangular geogrid on each layer of the slope and setting an eco-bag on the four-way triangular geogrid, and at the same time setting a four-way triangular geogrid on each layer of the slope to strengthen the overall stability of the slope.

[0068] It should be noted that the above is only a preferred embodiment of the present application, and the product form of the present application is not limited to the illustrations and embodiments of this case. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the scope of protection of the present application.

Claims

1. A three-dimensional ecological bag slope protection structure, characterized in that: include: Concrete foundation blocks set at the toe of the slope; and, a four-way triangular geogrid disposed on the rear side of the concrete foundation block; and, eco-bags fixed on top of each layer of four-way triangular geogrids and arranged in a stepped pattern; The four-way triangular geogrid is arranged in a trapezoidal shape from the foot of the slope to the top of the slope. The front end of the four-way triangular geogrid is provided with an extension extending to the outside of the slope surface. The extension is wrapped upward on the eco-bag and connected to the four-way triangular geogrid below the eco-bag through a connecting rod. The four-way triangular geogrid is fixed by a U-shaped steel bar after being tensioned on the horizontal plane. The eco-bag contains: a non-woven blanket, a grass grid, a filler, and a plant bag filled in the grass grid, the plant bag is filled with soil and plant seeds with developed root systems, and the rest of the space in the eco-bag except the grass grid is densely filled with the filler; The reinforcement layer spacing of the four-way triangular geogrid is the same and no more than 0.5m, and is in multiple relationship with the height of a single eco-bag.

2. The three-dimensional ecological bag slope protection structure according to claim 1 is characterized in that: Adjacent eco-bags are fixed to each other using three-dimensional drainage buckles.

3. The three-dimensional ecological bag slope protection structure according to claim 1 or 2, characterized in that: An anti-seepage membrane is laid below the top-pressing eco-bag, wherein the top-pressing eco-bag is an eco-bag fixed on the top of the slope.

4. The three-dimensional ecological bag slope protection structure according to claim 1 or 2, characterized in that: The filling material is a mixture of gravel soil, sandy soil and crushed stone soil.

5. The three-dimensional ecological bag slope protection structure according to claim 1 or 2, characterized in that: The cross-sectional shape of the concrete foundation block is L-shaped, and a drainage pipe is provided between the raised portion of the concrete foundation block and the transverse portion of the concrete foundation block.

6. The three-dimensional ecological bag slope protection structure according to claim 5 is characterized in that: A drainage pipe is arranged on each slope surface of the slope.

7. The three-dimensional ecological bag slope protection structure according to claim 6 is characterized in that: The three-dimensional eco-bag slope protection structure also includes drainage ditches arranged at the top and foot of the slope.

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