A pedestrian-resistant organic mulch roadway and method of making same

Abstract

The application discloses a kind of tread-resistant organic covering garden roads and its manufacturing method, by composite organic covering layer, leveling layer, cushion layer, waterproof layer, waterproof protective layer and drainage ditch composition;The prepared organic covering garden road has higher compactness and tread-resistant ability, increases the mildew-proof, fireproof, windproof ability of organic covering garden road, greatly improves the service life and safety of organic covering garden road, also has the effect of keeping moisture, adsorbing dust, adjusting soil temperature, increasing soil fertility, inhibiting weeds, promoting planting growth, reducing soil erosion and decoration beauty etc.

Description

Technical Field

[0001] This invention belongs to the field of urban landscaping construction, specifically relating to a trampling-resistant organic covered garden path and its manufacturing method. Background Technology

[0002] In urban park and green space management, visitors taking shortcuts trample the already compacted soil, making it even more compacted and restricting plant growth. Meanwhile, waste generated from garden maintenance is often discarded as garbage, failing to utilize the functions of the organic layer formed on the surface of mineral soil. Organic mulch garden paths, on the other hand, can maintain soil structure while effectively utilizing garden waste. Furthermore, it also has functions such as retaining moisture, absorbing dust, regulating soil temperature, increasing soil fertility, suppressing weeds, promoting plant growth, reducing soil erosion, and providing aesthetic appeal. However, traditional organic mulch garden paths have the following problems:

[0003] (1) It has poor resistance to trampling and a short service life. After one or two months of use, it will collapse and bald patches of varying degrees.

[0004] (2) The covering material used in traditional organic garden paths is relatively light and can be blown away in strong winds.

[0005] (3) Traditional organic mulch materials are prone to mold growth, which can cause garden paths to collapse, result in an unsightly appearance, and produce odors. If used for a long time, the mulch material needs to be added and replaced regularly, which creates a certain manpower and economic burden for maintenance.

[0006] (4) Traditional organic covered garden paths do not have a certain fire resistance. If a fire occurs, they will play a role in igniting and fueling the fire, creating safety hazards. Summary of the Invention

[0007] The purpose of this invention is to provide a trampling-resistant organic mulch garden path and its manufacturing method. The prepared garden path has high compactness and trampling resistance, increases the ability of the organic mulch garden path to prevent mold, fire and wind, greatly improves the service life and safety of the organic mulch garden path, and also has the functions of retaining moisture, absorbing dust, regulating soil temperature, increasing soil fertility, suppressing weeds, promoting plant growth, reducing soil erosion and decorative beauty.

[0008] To achieve the above objectives, the present invention provides the following technical solution:

[0009] A type of durable organic garden path, comprising, from top to bottom: a composite organic covering layer, a leveling layer, a subbase layer, a waterproof layer, a waterproof protective layer, and a drainage ditch;

[0010] The composite organic covering layer comprises, from top to bottom: a surface organic covering layer composed of organic wood chips with a particle size of 2-4 cm; a coconut fiber mesh with a grid of 2.5 cm × 2.5 cm to 3 cm × 3 cm; a support and reinforcement layer composed of organic wood chips with a particle size of 2-4 cm and imitation wood ceramic chips with a particle size of 4-5 cm; and a coconut fiber mesh with a grid of 1 cm × 1 cm to 1.5 cm × 1.5 cm; the volume ratio of organic wood chips to imitation wood ceramic chips in the support and reinforcement layer is 8:1 to 10:1.

[0011] The leveling layer comprises an upper layer of fine sand and a lower layer of polyhydroxy fatty acid hemp fiber composite geotextile.

[0012] The cushion layer is composed of gravel with a particle size of 2-4 cm;

[0013] The waterproof layer comprises an upper composite waterproof geomembrane and a lower fine sand layer;

[0014] The drainage ditch contains prefabricated drainage ditch components and a cover plate with side baffles.

[0015] Preferably, the composite organic covering layer has a thickness of 15-22cm, the leveling layer has a thickness of 1-3cm, the cushion layer has a thickness of 5-12cm, the waterproof layer has a thickness of 0.5-1cm, and the drainage ditch has a thickness of 10-20cm.

[0016] A method for constructing a durable, trampled-resistant organic garden path includes the following steps:

[0017] I. Site Selection and Leveling

[0018] Select a branch road or path in the park's green space system as the paving site. On the selected site, dig a pit 0.9-3m wide and 20-40cm deep, remove debris and level the surface. The bottom of the pit should form a symmetrical slope with a higher center and lower sides along the width direction, with a slope of 3-5%.

[0019] II. Drainage Laying

[0020] Excavate drainage ditches with a width of 10-20cm and a depth of 10-20cm on both sides of the bottom of the foundation pit, and lay drainage ditch prefabricated components and cover plates with side baffles that are adapted to the size of the drainage ditches.

[0021] III. Laying of Leveling Layer, Subbase Layer and Waterproofing Layer

[0022] After the drainage system is laid, a layer of fine sand with a thickness of 0.5-1cm is laid, followed by a composite waterproof geomembrane on the fine sand; then a layer of gravel with a particle size of 2-4cm with a thickness of 5-12cm is laid; then a layer of polyhydroxyalkanoate hemp fiber composite geotextile is laid on the layer of gravel, and finally a layer of fine sand with a thickness of 1-3cm is laid.

[0023] IV. Laying of Composite Organic Covering Layer

[0024] A 1cm×1cm-1.5cm×1.5cm coconut fiber mesh is laid on fine sand. Then, a 5-7cm thick support and reinforcement layer is laid on the coconut fiber mesh using a mixture of organic wood chips and imitation wood ceramic chips. On top of this, another 2.5cm×2.5cm-3cm×3cm coconut fiber mesh is laid. Finally, a 10-15cm thick surface organic covering layer is laid using organic wood chips with a particle size of 2-4cm. The volume ratio of the organic wood chips to the imitation wood ceramic chips is 8:1-10:1, the particle size of the organic wood chips is 2-4cm, and the particle size of the imitation wood ceramic chips is 4-5cm.

[0025] Preferably, in step two, the prefabricated drainage ditch includes a U-shaped ditch body, a cover plate with a side baffle placed on the upper surface of the ditch body, a water inlet hole on the surface of the cover plate, a hollow X-shaped support structure on the side of the ditch body, and the ditch body is made of high-density polyethylene; the cover plate is made of stainless steel with a thickness of 0.3-0.5cm.

[0026] Preferably, in step three, the manufacturing steps of the polyhydroxyalkanoate hemp fiber composite geotextile are as follows:

[0027] (1) Select polyhydroxy fatty acid fibers and hemp fibers with a length of 10-20mm, loosen them, and mix them evenly at a volume ratio of 1-1.5:1. The mixed fibers are combed into a thin web composed of single fibers. The thin web is then laid into a fiber web with a thickness of 8-10 layers by cross-laying. Ensure that every 100cm 2 The fiber web weighs 15-20g;

[0028] (2) The fiber web is hot-pressed and shaped to obtain a polyhydroxyalkanoate hemp fiber composite geotextile with a thickness of 2-3 mm and a density of 100 cm. 2 The mass of the polyhydroxy fatty acid hemp fiber composite geotextile is 10-15g; the hot pressing pressure is 12-13MPa, the hot pressing temperature is 170-180℃, and the hot pressing and heat preservation time is 50-60min.

[0029] Preferably, in step three, the composite waterproof geomembrane is composed of a combination of long-filament geotextile and a modified polyethylene membrane, forming a two-textile-one-membrane structure.

[0030] Preferably, in step three, the specific steps for manufacturing the modified polyethylene film are as follows:

[0031] (1) Add polyethylene to a hot melt stirrer, heat to 140-150℃, add calcium carbonate powder with a particle size of less than 0.1mm, stir evenly, then add starch and stir evenly to obtain a mixed raw material; the amount of calcium carbonate powder added is 15-20% of the total weight of polyethylene, and the amount of starch added is 3-5% of the total weight of polyethylene;

[0032] (2) Add the mixed raw materials to the extruder, keep the temperature at 140-150℃, and apply pressure to extrude the molten mixed raw materials to obtain a film with a thickness of 1.2-1.7 mm and a width of 0.9-3 m;

[0033] (3) The obtained film is cooled by air to form a modified polyethylene film.

[0034] Preferably, in step four, the organic veneer wood chip manufacturing process is as follows:

[0035] (1) Preparation of antiseptic soaking solution: Mix black pine branches and needles with Taiwan crabapple branches and leaves at a volume ratio of 2-3:1, wash them, dry them at 60-80℃ to constant weight, and crush them to a particle size of 0.2-1cm; add distilled water at a ratio of 5-10ml of liquid to 1g of material, and sonicate at 70-90℃ for 20-40min with an ultrasonic power of 100-150W; the filtered liquid is soaking solution A;

[0036] The roots of Sanguisorba officinalis were crushed to a particle size of 0.1-0.2 cm. Ethanol with a volume fraction of 60-70% was added at a liquid-to-solid volume ratio of 5-10:1. The mixture was stirred evenly and ultrasonically treated for 30-40 min at an ultrasonic power of 200-300 W. The filtered liquid was concentrated using a rotary evaporator at a pressure of 400-600 mmHg, a rotation speed of 50-160 r / min, and a evaporation time of 3-5 h to obtain a pale yellow soaking solution B.

[0037] The soaking solution A and soaking solution B are mixed at a volume ratio of 20-30:1 to obtain an anti-corrosion soaking solution;

[0038] (2) Wood chip soaking: The xylem of garden woody plant waste is crushed into wood chips with a particle size of 2-4 cm, and then the wood chips are soaked in the preservative soaking solution for 48-96 hours, and then taken out and dried;

[0039] (3) Spraying surface spray: Spray a 1-2 mm thick layer of spray onto the dried wood chips.

[0040] Preferably, in step four, the steps for making the imitation wood ceramic shards are as follows:

[0041] (1) Mixed mud, wherein the mud components are as follows by weight percentage: 30-50% river mud with a particle size of 2-5mm, 10-20% quartz with a particle size of 0.5-2mm, 10-20% ceramic powder with a particle size of 0.5-2mm, 10-20% red mud with a particle size of 2-5mm, and 10-20% kaolin;

[0042] (2) Add 2-4% hematite and 1-2% pyrite tailings of the total volume of the mud to the mixed mud, then add it to a vacuum mud refining machine to make the desired wood grain color mud, and finally age it.

[0043] (3) After aging, the colored clay is divided into clay sheets with a thickness of 2-4mm. The sheets are grouped according to the color order of the natural wood grain and folded 3-4 times to make wood grain clay balls.

[0044] (4) The obtained wood grain clay is divided into wood grain clay sheets, and then molded into wood-shaped wet clay blanks with a diameter of 4-5cm. Then it is dried at 30-60℃ to a moisture content of 9-10%, and then heated to 60-80℃ to dry to a moisture content of less than 3%.

[0045] (5) Firing: The dried and shaped clay body is fired at 1200-1300℃ for 7-8 hours to obtain imitation wood ceramic pieces.

[0046] This invention provides a durable organic covering for garden paths. The organic covering layer serves the main functions of mold prevention, fireproofing, wind protection, and aesthetic enhancement, while also strengthening the main load-bearing structure of the path and increasing its resistance to trampling. Two layers of coconut fiber mesh can initially fix the wood chips and imitation wood ceramic tiles, and later, as the structure stabilizes due to trampling, the coconut fiber mesh gradually decays and disappears.

[0047] The organic wood chips used are preservative-treated using a cold-pressed extract from the branches and leaves of black pine and Taiwan apple. The black pine extract inhibits bacteria such as Escherichia coli, Staphylococcus aureus, Bacillus subtilis, and Aspergillus niger. The Taiwan apple extract also inhibits bacteria such as Aspergillus niger, Mucor, Escherichia coli, and Staphylococcus aureus. This treated wood chip treatment avoids the heavy metal and organic pollution to the soil caused by traditional preservatives such as copper, chromium, arsenic, quaternary ammonium copper, tebuconazole, tributyltin oxide, and coal tar, and also effectively utilizes garden waste.

[0048] The organic veneer wood chips, after undergoing preservative treatment, are then sprayed with a surface agent containing potassium methylsilicate and silicone-acrylic emulsion, further enhancing their preservative properties. When potassium methylsilicate is heated, it decomposes, producing water vapor and inorganic silicates, which absorb heat and slow the spread of fire, giving the organic veneer wood chips a certain degree of fire resistance. Furthermore, potassium methylsilicate has excellent heat insulation properties, effectively isolating heat from the fire source. Therefore, organic veneer wood chips simultaneously possess excellent preservative, fireproof, and heat insulation properties, improving their safety; they are also antioxidant and have good chemical stability, remaining stable for extended periods at high temperatures without being oxidized or decomposed by oxygen and moisture in the air, thus extending their service life.

[0049] The wood-look ceramic slabs used in the organic mulch layer, with their abundant Si and Al content in the quartz and kaolin used as raw materials, significantly improve the overall strength of the slabs. The Fe content in the red mud increases the porosity of the wood-look ceramic slabs, ensuring good drainage. Adding a certain amount of wood-look ceramic slabs to the wood chips maximizes structural strength, reducing soil compaction and shear stress while maintaining overall aesthetics, thus improving the durability of organic mulch garden paths. Furthermore, neither wood chips nor wood-look ceramic slabs contain substances harmful to the soil and environment; they decompose over time, causing no environmental burden and are inexpensive.

[0050] The leveling layer consists of a fine sand layer and a polyhydroxyalkanoate hemp fiber composite geotextile. Its main function is to level the construction surface before laying the composite organic cover layer. The polyhydroxyalkanoate hemp fiber composite geotextile can isolate the gravel and fine sand in the subbase, reducing the impact of shear stress on the structure. Using polyhydroxyalkanoate (PHA) hemp fiber composite geotextile offers several advantages. First, hemp fiber is inexpensive and has a stronger water absorption capacity than ordinary synthetic fibers, providing some water retention. Second, PHA fiber possesses good mechanical strength and elasticity, compensating for the shortcomings of hemp fiber in terms of mechanical strength. Third, the PHA fiber in the material is biodegradable in soil, decomposing in almost all environments, including compost, soil, and seawater. The decomposition products are mostly water and carbon-based, enriching soil nutrients without burdening the environment, unlike traditional geotextiles which require later removal. Finally, in mechanically covered garden paths, PHA hemp fiber composite geotextile functions as aggregate separator, rainwater filter, and soil reinforcement barrier. It gradually decomposes within 2-3 years of installation, resulting in a more compact garden path structure and a more stable functional layer, at which point the soil reinforcement function of the PHA hemp fiber composite geotextile gradually becomes unnecessary.

[0051] The subbase is made of gravel with a particle size of 2-4cm. Its main function is to level the sloping roadbed and allow rainwater to infiltrate downwards in a timely manner.

[0052] The waterproof layer is designed to allow rainwater to quickly collect and be guided to drainage ditches. The composite waterproof geomembrane used in the waterproof layer is composed of a long-filament geotextile and a modified polyethylene membrane. The modified polyethylene membrane is modified with calcium carbonate and starch fillers to enhance its tensile strength and toughness, avoiding the soil contamination problem caused by the migration of plasticizers and solubilizers that occurs with traditional geomembranes buried underground. The fine sand laid beneath the composite waterproof geomembrane prevents minor protrusions from damaging the geomembrane after the underlying soil has been leveled.

[0053] Drainage ditches are mainly used to collect and drain rainwater. The high-density polyethylene prefabricated drainage ditch components used in their construction have a structure such as... Figure 2 The X-shaped frame shown reduces the amount of material used in the drainage prefabrication while maintaining high mechanical strength; its U-shaped cross-section and smooth inner wall prevent clogging during drainage. The high-density ethylene (high-density polyethylene) used is an environmentally friendly material, non-toxic and odorless. It can be recycled and reused once heated to its melting point, and has good surface hardness, tensile strength, rigidity, and other mechanical strengths, as well as good heat resistance, cold resistance, and chemical stability.

[0054] Compared with the prior art, the present invention has the following beneficial effects:

[0055] (1) Strong resistance to trampling: Through the structural design of composite organic covering layer, leveling layer, subbase layer, waterproof layer, waterproof protective layer and drainage ditch, the trampling resistance of the covered garden path is greatly improved. After two years of trampling test, the soil bulk density of the traditional organic covered garden path increased by 16.5%, while the soil bulk density of the trampling-resistant organic covered garden path designed in this invention increased by only 9.5%; the collapse depth of the trampling-resistant organic covered garden path of this invention is only one-fifth of that of the uncovered soil and one-third of that of the traditional organic covered garden path, which shows that the trampling-resistant organic covered garden path designed in this invention has strong trampling resistance.

[0056] (2) Anti-mildew, fireproof, and windproof: By improving the raw materials used, this invention effectively increases the anti-mildew, fireproof, and windproof capabilities of the garden path covering, significantly improving the service life and safety of the garden path covering. At the same time, it also has the functions of retaining moisture, absorbing dust, regulating soil temperature, increasing soil fertility, suppressing weeds, promoting plant growth, reducing soil erosion, and decorative aesthetics.

[0057] (3) Low cost and environmentally friendly: The organic wood chips, coconut fiber netting, hemp fiber, black pine and Taiwan apple branches and leaves used in the garden paths of this invention are all directly derived from natural materials, utilizing garden waste and realizing the recycling of organic waste. The polyhydroxy fatty acids, high-density ethylene and modified polyethylene used in this invention are also environmentally friendly materials. Moreover, polyhydroxy fatty acids can be decomposed by microorganisms in the soil, and the products are water and carbon-based, which will not burden the environment. The main materials used can be naturally degraded, reducing the later maintenance costs. Attached Figure Description

[0058] Figure 1 This is a schematic diagram of the structure of the tramp-resistant organic covered garden path of the present invention;

[0059] Figure 2 This is a partial enlarged view of section A of the walkway covered by the durable organic covering of the present invention;

[0060] Figure 3 This is a schematic diagram of the prefabricated drainage ditch component of the present invention;

[0061] Figure 4 This is a schematic diagram simulating the soil bulk density measurement results after different intensities of treatment;

[0062] Figure 5 This is a schematic diagram simulating the measurement results of ground collapse depth after different intensity treatments;

[0063] Figure 6 The curves show the temperature change of the back side of organic covered wood chips treated according to the method of the present invention and conventional organic covered wood chips as a function of heating time. Detailed Implementation

[0064] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0065] A type of durable organic garden path, from top to bottom, includes: a composite organic covering layer 1, a leveling layer 2, a subbase layer 3, a waterproof layer 4, and drainage ditches 5 set on both sides of the bottom.

[0066] The composite organic covering layer 1 comprises, from top to bottom: a surface organic covering layer 11 composed of organic covering wood chips with a particle size of 2-4 cm, a coconut fiber mesh 12 with a grid of 2.5 cm × 2.5 cm - 3 cm × 3 cm, a support and reinforcement layer 13 composed of organic covering wood chips with a particle size of 2-4 cm and imitation wood ceramic chips with a particle size of 4-5 cm, and a coconut fiber mesh 14 with a grid of 1 cm × 1 cm - 1.5 cm × 1.5 cm; the volume ratio of organic covering wood chips to imitation wood ceramic chips in the support and reinforcement layer is 8:1-10:1;

[0067] The leveling layer 2 includes an upper fine sand layer 21 and a lower polyhydroxy fatty acid hemp fiber composite geotextile 22;

[0068] The cushion layer 3 is composed of gravel with a particle size of 2-4 cm;

[0069] The waterproof layer 4 includes an upper composite waterproof geomembrane 41 and a lower fine sand layer 42;

[0070] The drainage ditch 5 contains a prefabricated drainage ditch component 51 and a cover plate 52 with side baffles.

[0071] Preferably, the composite organic covering layer has a thickness of 15-22cm, the leveling layer has a thickness of 1-3cm, the cushion layer has a thickness of 5-12cm, the waterproof layer has a thickness of 0.5-1cm, and the drainage ditch has a thickness of 10-20cm.

[0072] The prefabricated drainage ditch includes a U-shaped ditch body, a cover plate with a side baffle on one side placed on the upper surface of the ditch body, a water inlet hole on the surface of the cover plate, a hollow X-shaped support structure on the side of the ditch body, the ditch body is made of high-density polyethylene, and the cover plate is made of stainless steel with a thickness of 0.3-0.5cm.

[0073] (1) Test of resistance to trampling

[0074] The experimental site was located in the nursery of Shanghai Chenshan Botanical Garden, using ordinary planting soil with a generally consistent bulk density. Nine planting beds, each 1.5m wide and 3m long, were selected to simulate actual park green space paths, and different treatments were applied to each bed.

[0075] 1. Ordinary planting soil;

[0076] 2. Traditional organic garden paths covered with 20cm thick wood chips;

[0077] 3. This invention provides a durable, trample-resistant organic garden path cover;

[0078] Each process is repeated three times.

[0079] The constructed garden paths were subjected to simulated trampling treatment according to the calculations below. After each intensity treatment, the soil bulk density and the depth of collapse from the ground were measured.

[0080] 1.1 Calculation of human body pressure on the ground

[0081] To calculate the pressure exerted by a human body on the ground, use the following formula: P = F / S, where P is the pressure (in Pa), F is the force (in N), and S is the contact area with the ground (in m²). 2 The pressure exerted by a person on the ground is F = m × g, where m is the body weight (in kg) and g is the acceleration due to gravity, taken as 9.8 N / kg. The average mass of an adult is estimated to be 60 kg. Since a person exerts force on only one foot while walking, the contact area of ​​that foot is 0.02 m². 2That is, the pressure exerted on the ground by a single person walking is P = 60 × 9.8 / 0.02 = 29400 Pa. Assuming that the number of people passing through each square meter steps on the same spot, and taking the extreme pressure exerted on the ground, the total pressure exerted on the ground by the peak season pedestrian flow on the ground in one day is P = 29400 × 1920 = 56448000 Pa. Similarly, the pedestrian flow trampling pressure in 1 month, 6 months, 12 months, and 24 months should be 0 MPa, 1580 MPa, 9480 MPa, 18960 MPa, and 37920 MPa, respectively, for a total of 5 gradients.

[0082] 1.2 Calculation of Ground Pressure from Rammer

[0083] We will use a plate compactor to simulate the impact of pedestrian traffic on the ground. We will purchase a vibratory plate compactor. Based on the model and specifications of the equipment, the vibration force per compaction is 15kN, and the flat ground contact area is 50cm × 42cm = 0.21m². 2 Therefore, the pressure exerted on the ground by one tamping machine per stroke is calculated to be 71428.57 Pa. Since the machine's vibration frequency is 5500 VPM, meaning it tamps 5500 times per minute, the pressure exerted on the ground by the machine in one minute is 392.86 MPa. Thus, the required tamping depth is 1.5m × 3m = 4.5m. 2 To achieve the pressure gradients described above, the required tamping times are 0 min, 22.5 min, 108 min, 216 min, and 432 min, respectively.

[0084] Soil bulk density and ground collapse depth were measured after each intensity treatment. The measurement results are as follows: Figure 4 , Figure 5 As shown.

[0085] from Figure 4 and Figure 5 It can be seen that the bulk density and ground collapse depth of the trampling-resistant organic mulch garden path designed in this invention are significantly lower than those of traditional organic mulch garden paths and planting soil. After two years of trampling, the bulk density of the uncovered planting soil increased by 31.3%, the bulk density of the traditional organic mulch garden path increased by 16.5%, and the bulk density of the trampling-resistant organic mulch garden path of this invention increased by 9.5%. The ground collapse depth of the uncovered planting soil was 10.2 cm, the ground collapse depth of the traditional organic mulch garden path was 6.8 cm, and the ground collapse depth of the trampling-resistant organic mulch garden path of this invention was 2.4 cm, only one-fifth of the ground collapse depth of the uncovered soil and only one-third of that of the traditional organic mulch garden path. The trampling-resistant organic mulch garden path of this invention has strong trampling resistance.

[0086] (2) Performance testing of organic cover wood chips

[0087] 2.1 Corrosion Resistance Test

[0088] Traditional organic cover wood chips are made from the pulverized xylem of garden woody plant waste.

[0089] Twelve portions (100g each) of traditional organic mulch wood chips and organic mulch wood chips obtained according to the method of this invention were weighed separately and placed into 20cm×30cm nylon mesh bags. The bags were sealed and buried in the organic mulch garden paths of Shanghai Chenshan Botanical Garden at a depth of 20cm. The nylon bags containing the wood chips were dug up at 1 month, 6 months, 12 months, and 24 months, with three bags taken from each treatment. After drying, the bags were weighed and the weights recorded. The experimental results are shown in Table 1.

[0090]

[0091] As can be seen from the experimental results in Table 1, the mass of traditional organic mulch wood chips gradually decreases with increasing burial time, decreasing by 56.7% after two years. The organic mulch wood chips obtained by the method of this invention show a slight decrease in mass, decreasing by only 10.3% after two years, indicating that the organic mulch wood chips obtained by the method of this invention have strong anti-corrosion capabilities.

[0092] 2.2 Fire safety

[0093] The CZF-3 horizontal and vertical combustion tester was used as the combustion device, with a flame temperature of 950℃.

[0094] Traditional organic-coated wood chips (5mm thick, 4cm x 4cm) and organic-coated wood chips obtained by the method of this invention were selected and vertically fixed onto a combustion testing instrument. Thermocouples were fixed to the back of the wood chips. While a Bunsen burner was applied to one side of the wood chips, the thermocouples measured the temperature of the back of the wood chips, which was automatically recorded by a computer every 20 seconds. The initial ignition time was also recorded. The results... Figure 6 .

[0095] from Figure 6 The experimental results show that the ignition time of traditional organic covered wood chips is 12s, while the ignition time of organic covered wood chips obtained by the method of this invention is 43s.

[0096] The back surface temperature of both conventional organic veneer wood chips and the organic veneer wood chips treated by this invention gradually increased with increasing heating time. After 60 seconds, the back surface temperature of conventional organic veneer wood chips was 108.7℃, while the back surface temperature of the organic veneer wood chips treated by this invention was 39.9℃. After 80 seconds, the back surface temperature of conventional organic veneer wood chips was 294.2℃, while the back surface temperature of the organic veneer wood chips treated by this invention was 72.9℃. After the same treatment time, the back surface temperature of the organic veneer wood chips treated by this invention was only one-quarter of that of conventional organic veneer wood chips, indicating that the organic veneer wood chips treated by this invention have strong fire resistance.

[0097] Since the main raw material of the organic covering layer of the garden path in this invention is the organic covering wood chip obtained by the method of this invention, the garden path made using the organic covering wood chip with good anti-corrosion and fire resistance also has good anti-corrosion and fire resistance properties.

Claims

1. A type of durable, trampled organic-covered garden path, characterized in that, From top to bottom, it includes: composite organic covering layer, leveling layer, subbase layer, waterproof layer, waterproof protective layer and drainage ditch; The composite organic covering layer comprises, from top to bottom: a surface organic covering layer composed of organic wood chips with a particle size of 2-4 cm; a coconut fiber mesh with a grid of 2.5 cm × 2.5 cm to 3 cm × 3 cm; a support and reinforcement layer composed of organic wood chips with a particle size of 2-4 cm and imitation wood ceramic chips with a particle size of 4-5 cm; and a coconut fiber mesh with a grid of 1 cm × 1 cm to 1.5 cm × 1.5 cm; the volume ratio of organic wood chips to imitation wood ceramic chips in the support and reinforcement layer is 8:1 to 10:

1. The leveling layer comprises an upper layer of fine sand and a lower layer of polyhydroxy fatty acid hemp fiber composite geotextile. The cushion layer is composed of gravel with a particle size of 2-4 cm; The waterproof layer comprises an upper composite waterproof geomembrane and a lower fine sand layer; The drainage ditch contains prefabricated drainage ditch components and a cover plate with side baffles; The composite organic covering layer is 15-22cm thick, the leveling layer is 1-3cm thick, the cushion layer is 5-12cm thick, the waterproof layer is 0.5-1cm thick, and the drainage ditch is 10-20cm thick.

2. A method for manufacturing a tramp-resistant organic garden path as described in claim 1, characterized in that, Specifically, the following steps are included: I. Site Selection and Leveling Select a branch road or path in the park's green space system as the paving site. On the selected site, dig a pit 0.9-3m wide and 20-40cm deep, remove debris and level the surface. The bottom of the pit should form a symmetrical slope with a higher center and lower sides along the width direction, with a slope of 3-5%. II. Drainage Laying Excavate drainage ditches with a width of 10-20cm and a depth of 10-20cm on both sides of the bottom of the foundation pit, and lay drainage ditch prefabricated components and cover plates with side baffles that are adapted to the size of the drainage ditches. III. Laying of Leveling Layer, Subbase Layer and Waterproofing Layer After the drainage system is laid, a layer of fine sand with a thickness of 0.5-1cm is laid, followed by a composite waterproof geomembrane on the fine sand; then a layer of gravel with a particle size of 2-4cm with a thickness of 5-12cm is laid; then a layer of polyhydroxyalkanoate hemp fiber composite geotextile is laid on the layer of gravel, and finally a layer of fine sand with a thickness of 1-3cm is laid. IV. Laying of Composite Organic Covering Layer A 1cm×1cm-1.5cm×1.5cm coconut fiber mesh is laid on fine sand. Then, a 5-7cm thick support and reinforcement layer is laid on the coconut fiber mesh using a mixture of organic wood chips and imitation wood ceramic chips. On top of this, another 2.5cm×2.5cm-3cm×3cm coconut fiber mesh is laid. Finally, a 10-15cm thick surface organic covering layer is laid using organic wood chips with a particle size of 2-4cm. The volume ratio of the organic wood chips to the imitation wood ceramic chips is 8:1-10:1, the particle size of the organic wood chips is 2-4cm, and the particle size of the imitation wood ceramic chips is 4-5cm.

3. The method for manufacturing a tramp-resistant organic cover garden path as described in claim 2, characterized in that, In step two, the prefabricated drainage ditch includes a U-shaped ditch body, a cover plate with a side baffle on one side is placed on the upper surface of the ditch body, the surface of the cover plate is provided with water inlet holes, the side of the ditch body is a hollow X-shaped support structure, the ditch body is made of high-density polyethylene, and the cover plate is made of stainless steel with a thickness of 0.3-0.5cm.

4. The method for manufacturing a tramp-resistant organic cover garden path as described in claim 2, characterized in that, Step three involves the following steps in the fabrication of the polyhydroxy fatty acid hemp fiber composite geotextile: (1) Select polyhydroxy fatty acid fibers and hemp fibers with a length of 10-20mm, loosen them, and mix them evenly at a volume ratio of 1-1.5:

1. The mixed fibers are combed into a thin web composed of single fibers. The thin web is then laid into a fiber web with a thickness of 8-10 layers by cross-laying. Ensure that every 100cm 2 The fiber web weighs 15-20g; (2) The fiber web is hot-pressed and shaped to obtain a polyhydroxyalkanoate hemp fiber composite geotextile with a thickness of 2-3 mm and a density of 100 cm. 2 The mass of the polyhydroxy fatty acid hemp fiber composite geotextile is 10-15g; the hot pressing pressure is 12-13MPa, the hot pressing temperature is 170-180℃, and the hot pressing and heat preservation time is 50-60min.

5. The method for manufacturing a tramp-resistant organic cover garden path as described in claim 2, characterized in that, In step three, the composite waterproof geomembrane is composed of a combination of long-filament geotextile and modified polyethylene film, forming a two-fabric-one-film structure.

6. The method for manufacturing a tramp-resistant organic cover garden path as described in claim 5, characterized in that, In step three, the specific steps for manufacturing the modified polyethylene film are as follows: (1) Add polyethylene to a hot melt stirrer, heat to 140-150℃, add calcium carbonate powder with a particle size of less than 0.1mm, stir evenly, then add starch and stir evenly to obtain a mixed raw material; the amount of calcium carbonate powder added is 15-20% of the total weight of polyethylene, and the amount of starch added is 3-5% of the total weight of polyethylene; (2) Add the mixed raw materials to the extruder, keep the temperature at 140-150℃, and apply pressure to extrude the molten mixed raw materials to obtain a film with a thickness of 1.2-1.7 mm and a width of 0.9-3 m; (3) The obtained film is cooled by air to form a modified polyethylene film.

7. The method for manufacturing a tramp-resistant organic cover garden path as described in claim 2, characterized in that, Step four involves the following steps in creating the imitation wood ceramic shards: (1) Mixed mud, wherein the mud components are as follows by weight percentage: 30-50% river mud with a particle size of 2-5mm, 10-20% quartz with a particle size of 0.5-2mm, 10-20% ceramic powder with a particle size of 0.5-2mm, 10-20% red mud with a particle size of 2-5mm, and 10-20% kaolin; (2) Add 2-4% hematite and 1-2% pyrite tailings of the total volume of the mud to the mixed mud, then add it to a vacuum mud refining machine to make the desired wood grain color mud, and finally age it. (3) After aging, the colored clay is divided into clay sheets with a thickness of 2-4mm. The sheets are grouped according to the color order of the natural wood grain and folded 3-4 times to make wood grain clay balls. (4) The obtained wood grain clay is divided into wood grain clay sheets, and then molded into wood-shaped wet clay blanks with a diameter of 4-5cm. Then, it is dried at 30-60℃ to a moisture content of 9-10%, and then heated to 60-80℃ to dry to a moisture content of less than 3%. (5) Firing: The dried and shaped clay body is fired at 1200-1300℃ for 7-8 hours to obtain imitation wood ceramic pieces.

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