A new farmland road structure and soil solidification method

Abstract

The application provides a novel farmland road structure, which is paved on farmland base soil and comprises, from bottom to top, a mesh cloth layer, a water guide grid layer, a sand cushion layer and a solidified soil layer. The mesh cloth layer is covered on the farmland base soil, the water guide grid layer is covered on the mesh cloth layer and comprises an HDPE three-dimensional honeycomb grid, the height of the HDPE three-dimensional honeycomb grid is set as 150±50 mm, the sand cushion layer is filled in the HDPE three-dimensional honeycomb grid, the sand cushion layer is composed of medium coarse sand and / or gravel, and the solidified soil layer is covered on the sand cushion layer. The three-dimensional composite framework structure composed of the water guide grid layer and the sand cushion layer effectively disperses the upper vehicle load to a larger area of the base layer, greatly improves the overall rigidity and anti-deformation capacity of the road, effectively avoids the rut and subsidence problems of the traditional soil road under the rolling of heavy agricultural machinery, and the overlying solidified soil layer further provides a solid and flat driving surface.

Description

Technical Field

[0001] This invention relates to the field of agricultural infrastructure engineering technology, specifically to a novel farmland road structure and soil consolidation method suitable for modern agricultural production, which combines high load-bearing capacity, excellent drainage performance, eco-friendly characteristics, and multi-functional integration potential. Background Technology

[0002] Farmland roads are core infrastructure connecting fields, farmhouses, and main transportation networks. Their performance directly affects the efficiency of agricultural machinery passage, the cost of transporting agricultural production materials, and the convenience of field management. With the development of large-scale and mechanized agriculture, the limitations of traditional farmland roads have become increasingly prominent, becoming one of the bottlenecks restricting the improvement of efficiency and sustainable development in modern agriculture.

[0003] However, the common farmland road structures currently exist in the following types and their inherent defects: Simple dirt roads or gravel roads are the most traditional form of farmland roads. They typically involve directly leveling and compacting the existing surface, or laying a thin layer of gravel or crushed stone as the surface layer. Their structure is simple and inexpensive. However, their load-bearing capacity is extremely poor: under the repeated compaction of heavy agricultural machinery (such as combine harvesters and large tractors), they easily form deep ruts, potholes, and localized subsidence. Especially after rain, the roads quickly become muddy, making it difficult for agricultural machinery to pass or even causing it to get stuck, severely delaying farming operations. Furthermore, the muddy and waterlogged conditions during rainy days and the dusty conditions on sunny days worsen the working environment, affecting the precision of agricultural machinery operation and the health of personnel. Frequent leveling and compaction maintenance is required, resulting in significant long-term labor and machinery costs, and the maintenance period also disrupts traffic.

[0004] Concrete or asphalt-paved roads, using cement concrete or asphalt concrete for surface hardening, are commonly found in high-standard farmland construction projects. They offer advantages such as a smooth surface, high load-bearing capacity, and stable traffic conditions. However, large areas of impermeable paving completely block the exchange of soil moisture and air within the road area, easily leading to waterlogging and potentially exacerbating waterlogging or drought in the adjacent farmland. Furthermore, hard road surfaces absorb and release heat rapidly, creating localized high temperatures, which is detrimental to the farmland's micro-ecology. Simultaneously, they act as a "barrier," cutting off the habitat and migration routes of farmland organisms.

[0005] Simple gravel-base roads, where a thick layer of graded gravel is laid on a subgrade, attempt to improve load-bearing capacity and drainage. This is an improvement over purely dirt roads. However, under dynamic loads and water, the gravel easily embeds into the underlying soft soil (the "spring" phenomenon), leading to structural layer failure. Furthermore, fine soil particles rise and contaminate the base layer, blocking drainage channels. Therefore, this design is solely for passage and cannot be integrated with farmland irrigation and drainage systems, ecological conservation, or other functions. Moreover, it requires large quantities of externally purchased sand and gravel, which contradicts the principles of resource recycling and low-carbon development. Furthermore, current regulations on the protection and restoration of natural ecosystems explicitly prohibit the use of toxic or hazardous waste as fertilizer or for land reclamation; prohibit the entry of substandard sludge into arable land, forest land, or green space; prohibit the discharge of tailings, slag, and substandard dredged sediment that may cause soil pollution into agricultural land; restrict the construction of large-scale hard paving, large artificial mountains, fountains, and other artificial facilities in green spaces; restrict the large-scale use of imported soil to alter the original topography and landforms; strictly protect and utilize the original natural vegetation and trees of the site; and strictly restrict the use of non-native plants and artificial landscaping methods for rural greening construction.

[0006] Therefore, existing technologies have certain limitations. Summary of the Invention

[0007] This invention is made to solve the above-mentioned problems, and aims to provide a new type of farmland road structure and soil consolidation method.

[0008] This invention provides a novel farmland road structure, paved on farmland subgrade, comprising, from bottom to top: a mesh layer, a water-conducting mesh layer, a sand cushion layer, and a solidified soil layer. A mesh layer is placed on the farmland subgrade soil, and a water-conducting grid layer is placed on top of the mesh layer. The mesh layer includes an HDPE three-dimensional honeycomb grid with a height of 150±50mm. A sand cushion layer is filled in the HDPE three-dimensional honeycomb grid and is composed of medium-coarse sand and / or gravel. A solidified soil layer is placed on top of the sand cushion layer.

[0009] The novel structure for understory economic land provided by this invention also has the following feature: the mesh layer is geotextile.

[0010] The novel structure for understory economic land provided by this invention also has the following characteristics: the medium-coarse sand and gravel used in the sand cushion layer have a particle size of 10~15mm.

[0011] This invention also provides a soil stabilization method for producing stabilized soil, applicable to any of the aforementioned novel farmland road structures, characterized by the following steps: S1. Add farmland base soil to a mixing mixer and add solidifying agent at 3-6% of the original soil weight; S2. Start the mixer and mix at room temperature for 5-10 minutes to make the original soil evenly mixed. Then, put the evenly mixed modified soil into the dryer and dry it for at least half an hour or let it air dry for at least 3 days to obtain solidified soil with a moisture content of no more than 25%.

[0012] The soil solidification method provided by the present invention also has the following characteristics: by weight ratio, the solidifying agent includes 50% to 60% magnesium inorganic minerals, 12% to 15% calcium inorganic minerals, 5% to 10% clay minerals, and 5% to 10% activated alumina.

[0013] Furthermore, the inorganic mineral form of magnesium is magnesium oxide.

[0014] Furthermore, the inorganic mineral form of calcium is calcium carbonate.

[0015] Furthermore, the particle size of the curing agent is less than 120 μm.

[0016] The soil solidification method provided by this invention also has the following feature: the mixer is an impeller centrifugal mixer.

[0017] The soil solidification method provided by this invention also has the following feature: the dryer is a blower dryer.

[0018] The role and effect of invention According to the present invention, a novel farmland road structure and soil stabilization method utilize a three-dimensional composite skeleton structure consisting of a "water-guiding grid layer + sand cushion layer" to effectively distribute the vehicle load over a larger area of ​​the base layer. This significantly improves the overall rigidity and deformation resistance of the road, effectively preventing rutting and subsidence problems that occur on traditional dirt roads under heavy agricultural machinery. The overlying stabilized soil layer further provides a solid and smooth driving surface. Furthermore, the entire structural layer (except for the mesh isolation layer) has good permeability, maintaining water and air connectivity in the road area and reducing disruption and interference to the farmland ecosystem. The stabilized soil layer utilizes locally sourced or nearby farmland subgrade soil, reducing the need for purchased materials and waste soil, lowering carbon emissions and construction costs, and meeting the requirements for green agricultural infrastructure construction. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a novel farmland road structure according to the present invention; Figure 2 This is a top view of the water-guiding grid layer in a novel farmland road structure according to the present invention. Attached Figure

[0020] 10. Farmland base soil; 20. Mesh layer; 30. Drainage grid layer; 40. Sand cushion layer; 50. Stabilized soil layer. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this invention easier to understand, the following embodiments are described in detail with reference to the accompanying drawings. Example

[0022] This embodiment provides a novel farmland road structure, which is laid on farmland base soil 10 and includes, from bottom to top: a mesh layer 20, a water-conducting mesh layer 30, a sand cushion layer 40, and a solidified soil layer 50.

[0023] The mesh layer 20 covers the farmland subgrade soil 10, the water-conducting grid layer 30 covers the mesh layer 20, including HDPE three-dimensional honeycomb grid, the height of the HDPE three-dimensional honeycomb grid is set to 150±50mm, the sand cushion layer 40 is filled in the HDPE three-dimensional honeycomb grid, the sand cushion layer 40 is composed of medium and coarse sand and / or gravel, and the solidified soil layer 50 covers the sand cushion layer 40.

[0024] In this embodiment, the mesh layer 20 is preferably a geotextile.

[0025] In this embodiment, the particle size of the medium-coarse sand and gravel used in the sand cushion layer 40 is preferably 10~15mm.

[0026] The construction steps are as follows: First, the existing farmland foundation soil 10 on the site was leveled.

[0027] Secondly, lay a 20-layer mesh fabric. In this embodiment, a 150g / ㎡ polypropylene spunbond geotextile is selected. The fabric is laid flat, and the seams overlap by no less than 20cm.

[0028] Next, a water-guiding mesh layer 30 is laid, using a 160mm high HDPE three-dimensional honeycomb mesh, with the mesh panels securely connected using special plastic fasteners.

[0029] Then, a sand cushion layer 40 is filled into the honeycomb grid. The sand cushion layer 40 is made of medium-coarse sand with a particle size of 10-15mm and crushed stone mixed in a 1:1 volume ratio. It is filled to the level of the top of the grid and compacted by vibration.

[0030] Subsequently, a 50mm thick layer of solidified soil was laid.

[0031] Finally, simple drainage ditches can be installed on both sides of the structure, depending on the terrain, to systematically drain any surface water that may accumulate. If it is necessary to connect areas with different elevations, stable steps can be constructed using the same structural principles.

[0032] This embodiment also provides a soil stabilization method for creating stabilized soil in the stabilized soil layer 50, comprising the following steps: S1. Add 10g of farmland base soil to the mixing mixer and add 3-6% of the original soil weight of solidifying agent; S2. Start the mixer and mix at room temperature for 5-10 minutes to make the original soil evenly mixed. Then, put the evenly mixed modified soil into the dryer and dry it for at least half an hour or let it air dry for at least 3 days to obtain solidified soil with a moisture content of no more than 25%.

[0033] In this embodiment, the curing agent comprises, by weight, 50% to 60% magnesium inorganic minerals, 12% to 15% calcium inorganic minerals, 5% to 10% clay minerals, and 5% to 10% activated alumina.

[0034] Among them, the inorganic mineral of magnesium is preferably magnesium oxide; the inorganic mineral of calcium is preferably calcium carbonate; and the particle size of the curing agent is preferably less than 120 μm.

[0035] In this embodiment, the mixer is preferably an impeller centrifugal mixer.

[0036] In this embodiment, the dryer is preferably a blower dryer.

[0037] The specific steps for on-site preparation of solidified soil are as follows: Take 10g of farmland base soil and add 4.5% of a special solidifying agent by weight of the original soil (its composition by weight is: 58% magnesium oxide, 13% calcium carbonate, 8% bentonite, 8% activated alumina, and the remainder being processing auxiliary materials; powder fineness D100 < 120um). Use an impeller centrifugal mixer to mix the soil and solidifying agent for 7 minutes. Spread the uniformly mixed modified soil on the spot and let it air dry naturally for 4 days. The moisture content was measured to be below 22%, forming stable and permeable solidified soil.

[0038] The role and effect of the embodiments According to the present invention, a novel farmland road structure and soil stabilization method utilize a three-dimensional composite skeleton structure consisting of a "water-guiding grid layer + sand cushion layer" to effectively distribute the vehicle load over a larger area of ​​the base layer. This significantly improves the overall rigidity and deformation resistance of the road, effectively preventing rutting and subsidence problems that occur on traditional dirt roads under heavy agricultural machinery. The overlying stabilized soil layer further provides a solid and smooth driving surface. Furthermore, the entire structural layer (except for the mesh isolation layer) has good permeability, maintaining water and air connectivity in the road area and reducing disruption and interference to the farmland ecosystem. The stabilized soil layer utilizes locally sourced or nearby farmland subgrade soil, reducing the need for purchased materials and waste soil, lowering carbon emissions and construction costs, and meeting the requirements for green agricultural infrastructure construction.

[0039] The above embodiments are preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention.

Claims

1. A new type of farmland road structure, which is paved on a farmland base soil, characterized in that, From bottom to top, it includes: a mesh layer, a water-conducting mesh layer, a sand cushion layer, and a solidified soil layer. The mesh layer covers the farmland subgrade soil, the water-conducting mesh layer covers the mesh layer, including HDPE three-dimensional honeycomb mesh, the height of the HDPE three-dimensional honeycomb mesh is set to 150±50mm, the sand cushion layer is filled in the HDPE three-dimensional honeycomb mesh, the sand cushion layer is composed of medium and coarse sand and / or gravel, and the solidified soil layer covers the sand cushion layer.

2. The novel farmland road structure according to claim 1, characterized in that: wherein The mesh layer is geotextile.

3. The novel farmland road structure according to claim 1, characterized in that: wherein The medium-coarse sand and gravel used in the sand cushion layer have a particle size of 10~15mm.

4. A soil stabilization method for producing stabilized soil, applicable to the novel farmland road structure described in claims 1-3, characterized in that, Includes the following steps: S1. Add farmland base soil to a mixing mixer and add solidifying agent at 3-6% of the original soil weight; S2. Start the mixer and mix at room temperature for 5-10 minutes to make the original soil evenly mixed. Then, put the evenly mixed modified soil into the dryer and dry it for at least half an hour or let it air dry for at least 3 days to obtain solidified soil with a moisture content of no more than 25%.

5. The soil consolidation method according to claim 4, characterized in that: By weight, the curing agent comprises 50% to 60% magnesium inorganic minerals, 12% to 15% calcium inorganic minerals, 5% to 10% clay minerals, and 5% to 10% activated alumina.

6. The soil consolidation method according to claim 5, characterized in that: in, The inorganic mineral of magnesium is magnesium oxide.

7. The soil consolidation method according to claim 5, characterized in that: in, The inorganic mineral of calcium mentioned is calcium carbonate.

8. The soil consolidation method according to claim 5, characterized in that: in, The particle size of the curing agent is less than 120 μm.

9. The soil consolidation method according to claim 4, characterized in that: in, The mixer is an impeller centrifugal mixer.

10. The soil consolidation method according to claim 4, characterized in that: in, The dryer is a blower dryer.

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