Asphalt pavement structure in industrial plant area

Abstract

The utility model provides an industrial plant asphalt pavement structure. A fine-grain asphalt concrete part, an SBS modified emulsified asphalt bonding layer oil part, a medium-grain asphalt concrete part, a lower sealing layer, an oil permeable layer, a cement stabilized steel slag part, a graded steel slag part, two pieces of cloth and one film and a clay part are sequentially laid on a medium-wet type roadbed from top to bottom in the pavement direction; the reinforcing parts are laid on the cement stabilized steel slag parts and located at the boundaries of the two sides of the road surface; wherein the graded steel slag parts are compacted in a layered mode according to the equal thickness, the thickness of each graded steel slag layer is smaller than or equal to 20 cm, and the total thickness of the graded steel slag parts is larger than or equal to 48 cm. According to the present invention, the pavement structure can be more suitable for the medium-wet type roadbed, such that the pavement structure is not affected by the underground capillary water, and the structural strength, the mechanical property and the water absorption of the pavement structure are improved so as to improve the use stability of the pavement structure in the medium-wet type roadbed environment. And the reinforcing part plays a role in edge closing and reinforcing on the pavement structure, so that the vehicle is prevented from damaging the road edge.

Description

Technical Field

[0001] This disclosure relates to the technical field of straight railway structures in industrial plant areas under wet-type roadbed conditions, and particularly to a straight railway structure for industrial plant areas. Background Technology

[0002] Currently, industrial areas have high transportation demands, typically requiring a large number of transport vehicles to move goods. Among related technologies, asphalt pavement structures in industrial areas require a significant amount of aggregate, and the costs of quarrying and using this aggregate are high, leading to high construction costs for asphalt pavement structures in industrial areas. Furthermore, aggregate quarrying causes environmental pollution, water quality damage, and land degradation, impacting the environmental friendliness of straight railway sections.

[0003] Therefore, it is necessary to propose an asphalt pavement structure for industrial plant areas to at least partially solve the problems existing in the prior art. Utility Model Content

[0004] This disclosure aims to address at least one of the technical problems existing in the prior art or related technologies.

[0005] Therefore, this disclosure provides a straight section railway structure for an industrial plant area;

[0006] In view of this, according to an embodiment of the present disclosure, a straight section railway structure for an industrial plant is proposed, comprising:

[0007] The structural components include a fine-grained asphalt concrete section, an SBS-modified emulsified asphalt tack coat section, a medium-grained asphalt concrete section, a lower seal layer, a permeable layer, a cement-stabilized steel slag section, a graded steel slag section, a two-layer fabric and one-film structure, and a clay section; wherein the fine-grained asphalt concrete section, the SBS-modified emulsified asphalt tack coat section, the medium-grained asphalt concrete section, the lower seal layer, the permeable layer, the cement-stabilized steel slag section, the graded steel slag section, the two-layer fabric and one-film structure, and the clay section are laid sequentially from top to bottom in the road surface direction on a medium-wet type subgrade;

[0008] The reinforcement section is laid on the cement-stabilized steel slag section and located at both sides of the road surface, and the top of the reinforcement section is flush with the top of the fine-grained asphalt concrete section.

[0009] The graded steel slag section is compacted in layers of equal thickness, with each layer of graded steel slag having a thickness of less than or equal to 20 cm, and the total thickness of the graded steel slag section being greater than or equal to 48 cm.

[0010] In one feasible implementation, the above-mentioned two-layer fabric and one-layer film include:

[0011] Two layers of geotextile and one layer of geomembrane, with the geomembrane placed between the two layers of geotextile;

[0012] The geotextile is a composite nonwoven geotextile; the geomembrane is a plastic geomembrane.

[0013] In one feasible implementation, the mass of the geotextile is 80 g / m. 2 Up to 600g / m 2 ;

[0014] The thickness of the aforementioned geomembrane ranges from 0.3 mm to 2 mm;

[0015] The geotextile is bonded to the geomembrane by adhesive bonding, and the overlap length of the geotextile and the geomembrane is greater than or equal to 5 cm; and / or the overlap width of the geomembrane is greater than or equal to 30 cm.

[0016] In one feasible implementation, the thickness of the lower seal layer is 4 mm to 7 mm, and the asphalt content is 0.9 kg / m³. 2 Up to 1.3kg / m 2 The application rate of the aforementioned lower sealing layer is 5-8 m³ / 1000 m². 2 The steel slag aggregate has a polishing value greater than 36.

[0017] In one feasible implementation, the aforementioned cement-stabilized steel slag section includes:

[0018] First cement-stabilized steel slag layer and second cement-stabilized steel slag layer;

[0019] The first cement-stabilized steel slag layer is laid on top of the second cement-stabilized steel slag layer. The cement dosage of the first cement-stabilized steel slag layer is 5% to 6%, and the total thickness of the first cement-stabilized steel slag layer is 18cm to 20cm. The cement dosage of the second cement-stabilized steel slag layer is 3% to 5%, and the total thickness of the second cement-stabilized steel slag layer is 18cm to 20cm.

[0020] In one feasible implementation, the first cement-stabilized steel slag layer is provided with a first support layer and a second support layer, wherein the first support layer is located in the middle of the second support layer and protrudes from the second support layer, the first support layer and the road surface layer have the same width, the permeable layer is laid on the first support layer, and the reinforcement part is provided on the second support layer; the second support layer is wider than or equal to 30cm on each side relative to the road surface layer.

[0021] The second cement-stabilized steel slag layer and the second support layer have the same width;

[0022] The width of the aforementioned pavement surface layer is the same as the width of the aforementioned fine-grained asphalt concrete section, and the widths of the aforementioned fine-grained asphalt concrete section, the aforementioned SBS modified emulsified asphalt tack coat section, the aforementioned medium-grained asphalt concrete section, the aforementioned lower seal layer, and the aforementioned permeable layer are the same.

[0023] In one feasible embodiment, the asphalt in the permeable layer penetrates into the first support layer to a depth greater than or equal to 5 mm, and the amount of asphalt used in the permeable layer is 0.7 L / m. 2 Up to 1.5L / m 2 .

[0024] In one feasible embodiment, the amount of asphalt in the tack coat of the SBS-modified emulsified asphalt is 0.3 L / m. 2 Up to 0.5L / m 2 .

[0025] In one feasible embodiment, the thickness of the aforementioned fine-grained asphalt concrete section is 40 mm to 60 mm.

[0026] The thickness of the medium-grained asphalt concrete section mentioned above is 50mm to 80mm.

[0027] In one feasible implementation, the reinforcement includes:

[0028] A cement mortar layer is laid on the second support layer and located at both sides of the road surface layer.

[0029] The concrete curb and concrete backrest are laid on the cement mortar layer, and the top of the concrete curb is flush with the top of the fine-grained asphalt concrete section.

[0030] Compared to existing technologies, this disclosure offers at least the following advantages: The industrial plant asphalt pavement structure provided in this embodiment includes structural components and a reinforcement section. The structural components consist of a fine-grained asphalt concrete section, an SBS-modified emulsified asphalt tack coat section, a medium-grained asphalt concrete section, a lower seal coat, a permeable layer, a cement-stabilized steel slag section, a graded steel slag section, a two-layer fabric and one-film layer, and a clay section. These components are laid sequentially from top to bottom on a medium-wet type subgrade in the pavement direction. The reinforcement section is laid on top of the cement-stabilized steel slag section and located at both sides of the pavement boundary, with the top of the reinforcement section flush with the top of the fine-grained asphalt concrete section. This design, using cement-stabilized steel slag and graded steel slag sections instead of crushed stone in conventional pavement structures, reduces the amount of stone used, lowering both quarrying and usage costs. On one hand, it reduces environmental pollution from stone quarrying. Furthermore, steel slag, a byproduct of steelmaking, is typically disposed of as industrial waste through landfills or stockpiles, occupying valuable land resources and causing secondary pollution. Replacing some crushed stone with graded steel slag allows for waste recycling, making it more environmentally friendly. On the other hand, the graded steel slag section is compacted in layers of equal thickness, with each layer less than or equal to 20cm, and the total thickness of the graded steel slag section greater than or equal to 48cm. This design makes the asphalt pavement structure in industrial plant areas more suitable for medium-moisture subgrades, protecting it from the influence of groundwater capillary water and improving its structural strength, mechanical properties, and water absorption, thereby enhancing its stability in medium-moisture subgrade environments. The reinforcement section also provides edge reinforcement to the asphalt pavement structure, preventing vehicle damage to the road edges. Attached Figure Description

[0031] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of exemplary embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this disclosure. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0032] Figure 1 This is a schematic structural diagram of an asphalt pavement structure for an industrial plant area, as provided in this disclosure.

[0033] in, Figure 1 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0034] 1 Fine-grained asphalt concrete section, 2 SBS modified emulsified asphalt tack coat section, 3 Medium-grained asphalt concrete section, 4 Lower seal layer, 5 Permeable layer, 6 First cement-stabilized steel slag layer, 61 First support layer, 62 Second support layer, 7 Second cement-stabilized steel slag layer, 8 Graded steel slag section, 9 Two layers of fabric and one membrane, 10 Clay section, 11 Medium-wet type subgrade, 12 Concrete curbstone, 13 Cement mortar layer, 14 Concrete backing. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is intended to aid in understanding the present invention, but does not constitute a limitation thereof. The specific structural and functional details disclosed herein are only for describing exemplary embodiments of the present invention. However, the present invention may be embodied in many alternative forms and should not be construed as being limited to the embodiments described herein.

[0036] like Figure 1 As shown, according to an embodiment of this disclosure, an asphalt pavement structure for an industrial plant area is proposed, comprising: structural components, including a fine-grained asphalt concrete section 1 and an SBS (polystyrene-polybutadiene-polystyrene) section 2. The roadbed consists of a tyrene-butadiene block copolymer (SBS-modified emulsified asphalt tack coat, medium-grained asphalt concrete, lower seal coat, permeable layer, cement-stabilized steel slag, graded steel slag, two layers of fabric and one membrane, and clay. The fine-grained asphalt concrete, SBS-modified emulsified asphalt tack coat, medium-grained asphalt concrete, lower seal coat, permeable layer, cement-stabilized steel slag, graded steel slag, two layers of fabric and one membrane, and clay are laid sequentially from top to bottom on a medium-wet type roadbed 11. A reinforcement section is laid on top of the cement-stabilized steel slag section and located at both sides of the road surface, with the top of the reinforcement section flush with the top of the fine-grained asphalt concrete section 1. The graded steel slag section 8 is compacted in layers of equal thickness, with each layer less than or equal to 20 cm thick, and the total thickness of the graded steel slag section 8 greater than or equal to 48 cm.

[0037] Steel slag is a byproduct of the steelmaking process. It is produced in large quantities and is mostly disposed of as industrial waste through landfill or stockpiling, which occupies valuable land resources and causes secondary pollution.

[0038] The industrial plant asphalt pavement structure provided in this embodiment includes structural components and a reinforcement section. The structural components consist of a fine-grained asphalt concrete section 1, an SBS-modified emulsified asphalt tack coat section 2, a medium-grained asphalt concrete section 3, a lower seal layer 4, a permeable layer 5, a cement-stabilized steel slag section, a graded steel slag section 8, a two-layer fabric and one-film layer 9, and a clay section 10. These components are laid sequentially from top to bottom on a medium-wet type subgrade 11 in the pavement direction. The reinforcement section is laid on top of the cement-stabilized steel slag section and located at both sides of the pavement boundary, with the top of the reinforcement section flush with the top of the fine-grained asphalt concrete section 1. This design, using cement-stabilized steel slag and graded steel slag sections 8 instead of crushed stone in conventional pavement structures, reduces the amount of stone used, lowering both quarrying and usage costs. On one hand, it reduces environmental pollution from stone quarrying. Furthermore, steel slag, a byproduct of steelmaking, is typically disposed of as industrial waste through landfill or stockpiling, occupying valuable land resources and causing secondary pollution. Replacing some crushed stone with graded steel slag sections 8 allows for waste recycling, making it more environmentally friendly. On the other hand, the graded steel slag sections 8 are compacted in layers of equal thickness, with each layer less than or equal to 20cm, and the total thickness of the graded steel slag sections 8 greater than or equal to 48cm. This design makes the asphalt pavement structure in industrial plant areas more suitable for medium-moisture subgrades 11, preventing the asphalt pavement structure from being affected by underground capillary water, improving the structural strength, mechanical properties, and water absorption of the asphalt pavement structure, thereby enhancing its stability in medium-moisture subgrade environments. The reinforcement section also provides edge reinforcement to the asphalt pavement structure in industrial plant areas, preventing vehicles from damaging the road edges.

[0039] Understandably, the maximum particle size of the steel slag in graded steel slag section 8 is less than or equal to 37.5 mm; the width of graded steel slag section 8 relative to the road surface layer on each side is greater than or equal to 30 cm; graded steel slag section 8 uses granular graded steel slag; the nominal maximum particle size of the aggregate in graded steel slag section 8 is less than or equal to 53 mm; the CBR (California bearing ratio) of graded steel slag section 8 is greater than or equal to 120; and the compaction degree of graded steel slag section 8 is greater than or equal to 97%. The crushing value of the steel slag in graded steel slag section 8 is less than or equal to 30%, and the maximum particle size of the steel slag used is less than or equal to 37.5 mm. The steel slag must be decomposed and stabilized; aged slag stored for more than one year should be used, with a free calcium oxide content of less than 3% and a metallic iron content of less than or equal to 2%, and no other impurities should be present.

[0040] For example, in the section 0cm to 30cm below the top surface of the medium-moisture type subgrade 11, the subgrade compaction degree is ≥0.92 and CBR ≥5; in the section 30cm to 150cm below the top surface of the medium-moisture type subgrade 11, the subgrade compaction degree is ≥0.91 and CBR ≥3; in the section below 150cm below the top surface of the medium-moisture type subgrade 11, the subgrade compaction degree is greater than or equal to 0.90 and CBR is greater than or equal to 2. The rebound modulus E of the medium-moisture type subgrade 11 is ≥40MPa. The maximum particle size of the subgrade fill material of the medium-moisture type subgrade 11 is less than 100mm, and garbage and harmful impurities, such as waste magnesium bricks, should be removed.

[0041] Understandably, the clay layer 10 is laid on top of two layers of cloth and one membrane 9, with a thickness of 60cm to 80cm, to ensure the performance of the clay layer. The clay used in the clay layer 10 should be free of impurities such as domestic waste and humus.

[0042] In some examples, such as Figure 1 As shown, the two-layer geotextile and one-layer geomembrane 9 includes: two layers of geotextile and one layer of geomembrane, wherein the geomembrane is disposed between the two layers of geotextile; wherein the geotextile is a composite non-woven geotextile; and the geomembrane is a plastic geomembrane.

[0043] Understandably, the "two-layer geotextile and one-layer geomembrane" configuration (9) consists of two layers of geotextile and one layer of geomembrane. One layer of geotextile is laid on the clay layer (10), and the geomembrane is positioned between the two layers of geotextile. This "two-layer and one-layer" configuration improves the impermeability of the asphalt pavement structure in industrial areas and is more suitable for medium-wet subgrades (11). The geotextile can be a composite non-woven geotextile. Specifically, composite non-woven geotextiles can be polyester staple fiber needle-punched geotextile, polyester filament spunbond geotextile, or flat yarn woven fabric. The geomembrane can be a plastic geomembrane. Specifically, plastic geomembranes can be polyvinyl chloride (PVC) or polyethylene (PE).

[0044] In some examples, the mass of the geotextile mentioned above is 80 g / m. 2 Up to 600g / m 2 The thickness of the geomembrane is 0.3 mm to 2 mm; the geotextile is overlapped with the geomembrane by adhesive, and the overlap length of the geotextile and the geomembrane is greater than or equal to 5 cm; and / or the overlap width of the geomembrane is greater than or equal to 30 cm.

[0045] It is understandable that the mass of the geotextile is 80g / m. 2 Up to 600g / m 2 The thickness of the geomembrane is 0.3mm to 2mm to ensure the seepage prevention performance of the two-layer geotextile and one-layer geomembrane structure and to provide good structural strength. The fabric weights of the two geotextile layers are equal, and the ratio of geotextile fabric weight to geomembrane thickness is 400g / 0.5mm.

[0046] Understandably, geomembranes can be bonded to geotextiles to ensure the stability of the connection between the geomembrane and the geotextile. Specifically, to ensure connection strength, the overlap length between the geotextile and the geomembrane should be greater than or equal to 5 cm, and / or the overlap width of the geomembrane should be greater than or equal to 30 cm.

[0047] In some examples, such as Figure 1 As shown, the thickness of the lower sealing layer 4 is 4mm to 7mm, and the asphalt content is 0.9kg / m³. 2 Up to 1.3kg / m 2 The application rate of the lower sealing layer 4 is 5-8 m³ / 1000 m². 2 The steel slag aggregate has a polishing value greater than 36.

[0048] Understandably, the lower seal layer 4 serves a waterproof and watertight function, protecting the medium-wet type subgrade 11 from water damage, and can also act as a curing layer for the pavement surface. Specifically, the thickness of the lower seal layer 4 is 4mm to 7mm, and the asphalt content is 0.9kg / m³. 2 Up to 1.3kg / m 2 The aggregate for the lower sealing layer 4 can be steel slag instead of stone, reducing the amount of stone used and lowering the cost of stone mining and use. This reduces environmental pollution caused by stone mining, and steel slag, as a byproduct of steelmaking, is typically disposed of as industrial waste through landfill or stockpiling, occupying valuable land resources and causing secondary pollution. Using graded steel slag section 8 to replace part of the crushed stone allows for the reuse of waste, making it more environmentally friendly. Specifically, the spreading rate of the lower sealing layer 4 is 5-8 m³ / 1000 m². 2 The steel slag aggregate has a polishing value greater than 36.

[0049] In some examples, such as Figure 1 As shown, the aforementioned cement-stabilized steel slag section includes: a first cement-stabilized steel slag layer 6 and a second cement-stabilized steel slag layer 7; wherein, the first cement-stabilized steel slag layer 6 is laid on the second cement-stabilized steel slag layer 7, the cement dosage of the first cement-stabilized steel slag layer 6 is 5% to 6%, and the total thickness of the first cement-stabilized steel slag layer 6 is 18cm to 20cm; the cement dosage of the second cement-stabilized steel slag layer 7 is 3% to 5%, and the total thickness of the second cement-stabilized steel slag layer 7 is 18cm to 20cm.

[0050] Understandably, the cement-stabilized steel slag section includes a first cement-stabilized steel slag layer 6 and a second cement-stabilized steel slag layer 7 to improve the stability of the asphalt pavement structure in the industrial plant area. Specifically, the first cement-stabilized steel slag layer 6 is laid on top of the second cement-stabilized steel slag layer 7, and the cement dosage of the first cement-stabilized steel slag layer 6 is 5% to 6%, with a total thickness of 18cm to 20cm. The cement dosage of the second cement-stabilized steel slag layer 7 is 3% to 5%, and its total thickness is 18cm to 20cm.

[0051] For example, the first cement-stabilized steel slag layer 6 is a cement-stabilized steel slag semi-rigid base course, and the nominal maximum particle size of the aggregate in the first cement-stabilized steel slag layer 6 is ≤31.5mm; the compaction degree of the first cement-stabilized steel slag layer 6 is ≥98%; the 7-day unconfined compressive strength of the first cement-stabilized steel slag layer 6 is ≤4MPaP; the water immersion expansion rate of the steel slag in the first cement-stabilized steel slag layer 6 is ≤1.5%; the steel slag in the first cement-stabilized steel slag layer 6 must be decomposed and stabilized, and should be aged slag that has been stored for more than one year, with a free calcium oxide content of <3%, a metallic iron content of ≤2.0%, and should not contain other impurities.

[0052] For example, the second cement-stabilized steel slag layer 7 is a cement-stabilized steel slag semi-rigid base course, and the nominal maximum particle size of the aggregate in the second cement-stabilized steel slag layer 7 is ≤37.5mm; the compaction degree of the first cement-stabilized steel slag layer 6 is ≥97%; the 7-day unconfined compressive strength of the first cement-stabilized steel slag layer 6 is ≤2.5MPa; the water immersion expansion rate of the steel slag in the first cement-stabilized steel slag layer 6 is ≤1.5%; the steel slag in the first cement-stabilized steel slag layer 6 must be decomposed and stabilized, and aged slag stored for more than one year should be used, the free calcium oxide content should be <3%, the metallic iron content in the steel slag should be ≤2.0%, and it should not contain other impurities.

[0053] In some examples, such as Figure 1 As shown, the first cement-stabilized steel slag layer 6 is provided with a first support layer 61 and a second support layer 62. The first support layer 61 is located in the middle of the second support layer 62 and protrudes from the second support layer 62. The first support layer 61 and the road surface layer have the same width. The permeable layer 5 is laid on the first support layer 61, and the reinforcement part is provided on the second support layer 62. The second support layer 62 is wider than the road surface layer on each side by an dimension greater than or equal to 30 cm. The second cement-stabilized steel slag layer 7 and the second support layer 62 have the same width. The width of the road surface layer is the width of the fine-grained asphalt concrete section 1, and the widths of the fine-grained asphalt concrete section 1, the SBS modified emulsified asphalt tack coat section 2, the medium-grained asphalt concrete section 3, the lower seal layer 4, and the permeable layer 5 are the same.

[0054] It is understood that the first cement-stabilized steel slag layer 6 is provided with a first support layer 61 and a second support layer 62. Specifically, the first support layer 61 is laid on the second support layer 62, and the first support layer 61 is located in the middle of the second support layer 62. The second support layer 62 supports the first support layer 61, and the first support layer 61 supports the road surface layer. The first support layer 61 and the road surface layer have the same width, and the permeable layer 5 is laid on the first support layer 61. The second support layer 62 is wider than the road surface layer by at least 30cm on each side, and the reinforcing parts are provided on the second support layer 62 and located on both sides of the first support layer 61. The second cement-stabilized steel slag layer 7 has the same width as the second support layer 62 to ensure the overall support effect on the first cement-stabilized steel slag layer 6. The width of the pavement surface layer is the same as the width of the fine-grained asphalt concrete section 1, and the widths of the fine-grained asphalt concrete section 1, the SBS modified emulsified asphalt tack coat section 2, the medium-grained asphalt concrete section 3, the lower seal layer 4, and the aforementioned permeable layer 5 are the same.

[0055] In some examples, the asphalt in the permeable layer 5 penetrates into the first support layer 61 to a depth greater than or equal to 5 mm, and the amount of asphalt used in the permeable layer 5 is 0.7 L / m. 2 Up to 1.5L / m 2 .

[0056] Understandably, the permeable layer 5 is placed between the lower sealing layer 4 and the first support layer 61 to improve curing quality and reduce curing costs. Specifically, the asphalt in the permeable layer 5 penetrates into the first support layer 61 to a depth greater than or equal to 5 mm, and the asphalt content of the permeable layer 5 is 0.7 L / m. 2 Up to 1.5L / m 2 .

[0057] In some examples, the bitumen content in the tack coat 2 of the above-mentioned SBS modified emulsified bitumen is 0.3 L / m. 2 Up to 0.5L / m 2 .

[0058] Understandably, the SBS-modified emulsified asphalt tack coat 2 is positioned between the fine-grained asphalt concrete section 1 and the medium-grained asphalt concrete section 3. Using SBS-modified emulsified asphalt can improve the bond strength and stability of the tack coat. Specifically, the asphalt content in the SBS-modified emulsified asphalt tack coat 2 is 0.3 L / m³. 2 Up to 0.5L / m 2 .

[0059] In some examples, the thickness of the fine-grained asphalt concrete section 1 is 40 mm to 60 mm; the thickness of the medium-grained asphalt concrete section 3 is 50 mm to 80 mm.

[0060] Understandably, fine-grained asphalt concrete has smaller aggregate particle sizes, typically between 0mm and 5mm, resulting in better surface smoothness and density, thus improving pavement quality. Medium-grained asphalt concrete has moderate aggregate particle sizes, typically between 5mm and 10mm, offering good density and durability. Specifically, the thickness of fine-grained asphalt concrete section 1 is 40mm to 60mm; the thickness of medium-grained asphalt concrete section 3 is 50mm to 80mm to ensure performance.

[0061] In some examples, such as Figure 1 As shown, the reinforcement includes: a cement mortar layer 13, laid on the second support layer 62, located at both sides of the road surface layer; a concrete curb stone 12 and a concrete backrest 14 laid on the cement mortar layer 13, and the top of the concrete curb stone 12 is flush with the top of the fine-grained asphalt concrete part 1.

[0062] Understandably, the reinforcement section comprises a cement mortar layer 13, a concrete curb 12, and a concrete backrest 14. The cement mortar layer 13 is laid on the second support layer 62, the concrete curb 12 is laid on top of the cement mortar layer 13 with its top edge flush with the top edge of the fine-grained asphalt concrete section 1, and the concrete backrest 14 is laid on top of the cement mortar layer 13, located outside the concrete curb 12. The concrete curb 12 has a strength ≥ C50; the concrete backrest 14 has a strength ≥ C30.

[0063] For example, the construction process of asphalt pavement structure in industrial plant area is as follows:

[0064] (1) After removing the surface fill of the medium-moisture type subgrade 11, the medium-moisture type subgrade 11 is over-excavated to the depth range of the subgrade working area, and backfilled and compacted in layers. The layer thickness is not greater than 200mm. A vibratory roller is used to make the resilient modulus E of the subgrade top surface ≥ 40MPa. From 0cm to 30cm below the subgrade surface, the subgrade compaction degree is ≥ 0.92 and CBR ≥ 5; from 30 to 80cm below the subgrade surface, the subgrade compaction degree is ≥ 0.92 and CBR ≥ 3; from 80 to 150cm below the subgrade surface, the subgrade compaction degree is ≥ 0.91 and CBR ≥ 3; and below 150cm below the subgrade surface, the subgrade compaction degree is ≥ 0.90 and CBR ≥ 2.

[0065] (2) Fill with clay to construct clay section 10 with a thickness of 60cm.

[0066] (3) Lay two layers of fabric and one membrane 9, first laying the fabric with a mass of 200g / m 2 The process involves laying a polyester staple fiber needle-punched geotextile, followed by a 2.00mm thick polyethylene geomembrane, and finally a 200g / m³ geomembrane. 2Polyester staple fiber needle-punched geotextile. The geotextile material overlaps are bonded together, with an overlap length of 5cm.

[0067] (4) The graded steel slag cushion layer is filled in layers to construct the graded steel slag section 8. The layer thickness is not greater than 200mm, the maximum particle size of the steel slag is not greater than 53mm, the CBR of the graded steel slag section 8 is ≥120, the compaction degree of the graded steel slag section 8 is ≥97%, and the graded steel slag section 8 is ≥30cm wider than the road surface on each side relative to the second cement-stabilized steel slag layer 7.

[0068] (5) Fill the second cement-stabilized steel slag layer 7 with a cement dosage of 3% to 5% and a total layer thickness of 18cm to 20cm. The second cement-stabilized steel slag layer 7 and the second support layer 62 have the same width.

[0069] (6) Fill the first cement-stabilized steel slag layer 6, first fill the second support layer 62, then fill the first support layer 61. The cement dosage is 5% to 6%, and the total layer thickness is 18cm to 20cm. The second support layer 62 and the second cement-stabilized steel slag layer 7 have the same width, and the first support layer 61 has the same width as the road surface layer.

[0070] (7) An oil-permeable layer 5 is laid on top of the first support layer 61. The oil-permeable layer 5 is an emulsified asphalt tack coat. The emulsified asphalt tack coat uses emulsified asphalt PC-2, and the penetration depth into the base layer is not less than 5mm. The asphalt dosage is 0.7L / m. 2 Up to 1.5L / m 2 The permeable asphalt tack coat is made of ES-2 type slurry seal as the lower seal layer, with a thickness of 6mm.

[0071] (8) Lay the lower seal layer 4 on the permeable layer 5. The lower seal layer 4 can be paved with slow-cracking or medium-cracking mixed emulsified asphalt, with an asphalt content of 0.9 kg / m³. 2 Up to 1.3kg / m 2 The application rate is 5m / 1000m. 2 Up to 8m / 1000m 2 The steel slag aggregate is of type S12 and has a thickness of 1cm.

[0072] (9) Lay medium-grained asphalt concrete section 3 and compact it.

[0073] (10) Apply SBS modified emulsified asphalt tack coat 2 to medium-grained asphalt concrete section 3.

[0074] (11) Laying fine-grained asphalt concrete section 1.

[0075] It should be understood that the terms "first," "second," etc., are used only for distinguishing descriptions and should not be construed as indicating or implying relative importance. Although the terms "first," "second," etc., may be used herein to describe various units, these units should not be limited by these terms. These terms are only used to distinguish one unit from another. For example, a first unit may be referred to as a second unit, and similarly, a second unit may be referred to as a first unit, without departing from the scope of the exemplary embodiments of this utility model.

[0076] It should be understood that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can mean: A exists alone, B exists alone, and A and B exist simultaneously. The term " / and" in this article describes another relationship between related objects, indicating that two relationships can exist. For example, A / and B can mean: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the related objects before and after it are in an "or" relationship.

[0077] It should be understood that in the description of this utility model, the terms "upper," "vertical," "inner," "outer," etc., indicate the orientation or positional relationship when the disclosed product is used, or the orientation or positional relationship commonly understood by those skilled in the art. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0078] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0079] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the present invention. As used herein, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” “containing,” and / or “including” as used herein specify the presence of the stated features, integers, steps, operations, units, and / or components, and do not exclude the presence or addition of one or more other features, quantities, steps, operations, units, components, and / or combinations thereof.

[0080] Specific details are provided in the following description to provide a complete understanding of the exemplary embodiments. However, those skilled in the art will understand that the exemplary embodiments can be implemented without these specific details. In other embodiments, well-known processes, structures, and techniques may be omitted in the depiction of non-essential details to avoid obscuring the exemplary embodiments.

[0081] The above are merely specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

[0082] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art.

Claims

1. An industrial plant asphalt pavement structure characterized by, Comprise: a structural assembly comprising a fine-grained asphalt concrete part, an SBS modified emulsified asphalt tack coat oil part, a medium-grained asphalt concrete part, a lower seal coat, an oil permeable layer, a cement stabilized steel slag part, a graded steel slag part, a two-cloth-one-film, and a clay part; wherein the fine-grained asphalt concrete part, the SBS modified emulsified asphalt tack coat oil part, the medium-grained asphalt concrete part, the lower seal coat, the oil permeable layer, the cement stabilized steel slag part, the graded steel slag part, the two-cloth-one-film, and the clay part are sequentially laid from top to bottom from the road surface direction on a medium-wet type subgrade; a reinforcing part laid on the cement stabilized steel slag part and located at the two side boundaries of the road surface, and the top of the reinforcing part is flush with the top of the fine-grained asphalt concrete part; wherein the graded steel slag part is compacted in layers of equal thickness, the thickness of each graded steel slag layer is less than or equal to 20 cm, and the total thickness of the graded steel slag part is greater than or equal to 48 cm.

2. The industrial plant asphalt pavement structure of claim 1, wherein, The two-cloth-one-film comprises: two layers of geotextile cloth and one layer of geomembrane, the geomembrane is arranged between the two layers of geotextile cloth; wherein the geotextile cloth is a composite non-woven cloth material, and the geomembrane is a plastic material.

3. The industrial plant asphalt pavement structure according to claim 2, wherein: The geotextile has a mass of 80 g / m 2 up to 600 g / m 2 ; the thickness of the geomembrane is 0.3mm to 2mm; the geotextile cloth is overlapped on the geomembrane by adhesive bonding, and the overlapping length of the geotextile cloth and the geomembrane is greater than or equal to 5cm; and / or the overlapping width of the geomembrane is greater than or equal to 30cm.

4. The industrial plant asphalt pavement structure according to claim 1, wherein: The thickness of the lower seal coat is 4mm to 7mm, and the asphalt dosage is 0.9kg / m 2 to 1.3kg / m 2 The spreading dosage of the lower seal coat is 5 to 8m / 1000m 2 of steel slag aggregate, and the polishing value of the steel slag aggregate is greater than 36.

5. The industrial plant asphalt pavement structure of claim 1, wherein, the cement stabilized steel slag part comprises: a first cement stabilized steel slag layer and a second cement stabilized steel slag layer; wherein the first cement stabilized steel slag layer is laid on the second cement stabilized steel slag layer, the total thickness of the first cement stabilized steel slag layer is 18cm to 20cm; and the total thickness of the second cement stabilized steel slag layer is 18cm to 20cm.

6. The industrial plant asphalt pavement structure according to claim 5, wherein: the first cement stabilized steel slag layer is provided with a first support layer and a second support layer, wherein the first support layer is located in the middle of the second support layer and protrudes from the second support layer, the first support layer has the same width as the road surface layer, the oil permeable layer is laid on the first support layer, and the reinforcing part is arranged on the second support layer; the second support layer is wider than the road surface layer on each side by a dimension greater than or equal to 30cm; the second cement stabilized steel slag layer has the same width as the second support layer; wherein the width of the road surface layer is the width of the fine-grained asphalt concrete part, and the widths of the fine-grained asphalt concrete part, the SBS modified emulsified asphalt tack coat oil part, the medium-grained asphalt concrete part, the lower seal coat, and the oil permeable layer are the same.

7. The industrial plant asphalt pavement structure according to claim 6, wherein: The depth of penetration of the bitumen of the oil-permeable layer into the first support layer is greater than or equal to 5 mm, and the bitumen of the oil-permeable layer is used in an amount of 0.7 L / m 2 to 1.5 L / m 2 .

8. The industrial plant asphalt pavement structure according to claim 1, wherein: The asphalt amount in the oil layer of the SBS modified emulsified asphalt tack coat oil part is 0.3L / m 2 to 0.5L / m 2 .

9. The industrial plant asphalt pavement structure according to claim 6, wherein: The thickness of the fine-grained asphalt concrete part is 40mm to 60mm; The thickness of the medium-grained asphalt concrete part is 50mm to 80mm.

10. The industrial plant asphalt pavement structure of claim 6, wherein, The reinforcing part comprises: A cement mortar layer is laid on the second supporting layer at the two side boundaries of the pavement surface layer; Concrete curb stones and concrete backrests are laid on the cement mortar layer, and the top ends of the concrete curb stones are flush with the top end of the fine-grained asphalt concrete part.

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