Asphalt pavement structure in industrial plant area

Abstract

The invention 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] The present disclosure relates to the technical field of straight-segment railway structures in industrial plant areas under wet roadbed conditions, and in particular to a straight-segment railway structure in an industrial plant area. Background Art

[0002] At present, industrial plants usually need a large number of transport vehicles to transport goods due to the large demand for transportation. In the related technology, the asphalt pavement structure in industrial plants requires a lot of stone materials, and the mining and use costs of stone materials are high, resulting in high construction costs for asphalt pavement structures in industrial plants. In addition, the mining of stone materials will cause environmental pollution, water quality damage and land destruction, affecting the environmental protection of the construction of straight railway sections.

[0003] Therefore, it is necessary to propose an industrial plant asphalt pavement structure to at least partially solve the problems existing in the prior art. Summary of the invention

[0004] The present disclosure aims to solve at least one of the technical problems existing in the prior art or related art.

[0005] To this end, the present disclosure provides a straight section railway structure for an industrial plant;

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

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

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

[0009] Wherein, the graded steel slag portion 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 portion is greater than or equal to 48 cm.

[0010] In a feasible implementation manner, the above two cloths and one membrane include:

[0011] Two layers of geotextiles and one layer of geomembrane, the geomembrane is arranged between the two layers of geotextiles;

[0012] Among them, the above-mentioned geotextile is a geotextile made of composite non-woven fabric; and the above-mentioned geomembrane is a geomembrane made of plastic material.

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

[0014] The thickness of the above geomembrane is 0.3mm to 2mm;

[0015] The geotextile is overlapped with the geomembrane by means of viscose, 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 a feasible implementation manner, the thickness of the lower seal layer is 4 mm to 7 mm, and the amount of asphalt used is 0.9 kg / m 2 Up to 1.3kg / m 2 The spreading amount of the above lower sealing layer is 5-8m / 1000m 2 The steel slag aggregate has a polishing value greater than 36.

[0017] In a feasible implementation manner, the cement stabilized steel slag portion comprises:

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

[0019] Among them, the first cement-stabilized steel slag layer is laid on 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 a feasible embodiment, the first cement-stabilized steel slag layer is provided with a first supporting layer and a second supporting layer, wherein the first supporting layer is located in the middle of the second supporting layer and protrudes from the second supporting layer, the first supporting layer and the road surface layer have the same width, the oil-permeable layer is laid on the first supporting layer, and the reinforcement portion is arranged on the second supporting layer; the second supporting layer is wider than the road surface layer on each side by a size greater than or equal to 30 cm;

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

[0022] Among them, the width of the above-mentioned road surface layer is the width of the above-mentioned fine-grained asphalt concrete part, and the widths of the above-mentioned fine-grained asphalt concrete part, the above-mentioned SBS modified emulsified asphalt tack coat oil part, the above-mentioned medium-grained asphalt concrete part, the above-mentioned lower seal layer and the above-mentioned oil-permeable layer are the same.

[0023] In a feasible implementation manner, the depth of asphalt in the oil-permeable layer penetrating into the first support layer is greater than or equal to 5 mm, and the amount of asphalt in the oil-permeable layer is 0.7 L / m 2 Up to 1.5L / m 2 .

[0024] In a feasible embodiment, the amount of asphalt in the oil layer of the above-mentioned SBS modified emulsified asphalt adhesive layer is 0.3L / m 2 Up to 0.5L / m 2 .

[0025] In a feasible embodiment, the thickness of the fine-grained asphalt concrete portion is 40 mm to 60 mm;

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

[0027] In a feasible implementation manner, the reinforcement portion includes:

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

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

[0030] Compared with the prior art, the present disclosure at least includes the following beneficial effects: the industrial plant asphalt pavement structure provided by the embodiment of the present disclosure is provided with a structural component and a reinforcement part. Among them, the structural component is provided with a fine-grained asphalt concrete part, an SBS modified emulsified asphalt tack coat oil part, a medium-grained asphalt concrete part, a lower seal layer, an oil-permeable layer, a cement-stabilized steel slag part, a graded steel slag part, two cloths and one membrane, and a clay part, and the fine-grained asphalt concrete part, the SBS modified emulsified asphalt tack coat oil part, the medium-grained asphalt concrete part, the lower seal layer, the oil-permeable layer, the cement-stabilized steel slag part, the graded steel slag part, the two cloths and one membrane, and the clay part are laid in sequence from top to bottom in the direction of the road surface on the medium-wet type roadbed. And the reinforcement part is laid on the cement-stabilized steel slag part and is located at the boundaries of both sides of the road surface, and the top of the reinforcement part is flush with the top of the fine-grained asphalt concrete part. In this way, cement stabilized steel slag parts and graded steel slag parts are used to replace the crushed stones used in conventional pavement structures, which reduces the amount of stone used, reduces the mining cost and use cost of stone, and reduces the environmental pollution caused by mining stone. In addition, steel slag, as a by-product of the steelmaking process, is usually landfilled or stored as industrial waste, occupying precious land resources and generating secondary pollution. Using graded steel slag parts to replace part of the crushed stones can achieve secondary utilization of waste, which is more environmentally friendly. On the other hand, the graded steel slag parts are compacted in layers with equal thickness, the thickness of each graded steel slag layer is less than or equal to 20cm, and the total thickness of the graded steel slag parts is greater than or equal to 48cm. In this way, the asphalt pavement structure in the industrial plant area can be more suitable for the medium-wet type roadbed, so that the asphalt pavement structure in the industrial plant area is not affected by underground capillary water, and the structural strength, mechanical properties and water absorption of the asphalt pavement structure in the industrial plant area are improved, thereby improving the use stability of the asphalt pavement structure in the industrial plant area in the medium-wet type roadbed environment. The reinforcement part plays the role of edge reinforcement of the asphalt pavement structure in the industrial plant area to prevent vehicles from damaging the edge of the road. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the exemplary embodiments below. The accompanying drawings are only for the purpose of illustrating exemplary embodiments and are not to be considered as limiting the present disclosure. Also, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0032] Figure 1 A schematic structural diagram of an asphalt pavement structure in an industrial plant area according to an embodiment of the present disclosure.

[0033] in, Figure 1 The corresponding relationship between the reference numerals and the component names is as follows:

[0034] 1 fine-grained asphalt concrete part, 2 SBS modified emulsified asphalt tack coat part, 3 medium-grained asphalt concrete part, 4 lower seal layer, 5 oil-permeable layer, 6 first cement-stabilized steel slag layer, 61 first supporting layer, 62 second supporting layer, 7 second cement-stabilized steel slag layer, 8 graded steel slag part, 9 two cloths and one membrane, 10 clay part, 11 medium-wet type roadbed, 12 concrete flat curb, 13 cement mortar layer, 14 concrete backrest. DETAILED DESCRIPTION

[0035] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. The specific structures and functional details disclosed herein are only used to describe the exemplary embodiments of the present invention. However, the present invention can be embodied in many alternative forms, and it should not be understood that the present invention is limited to the embodiments set forth herein.

[0036] like Figure 1 As shown, according to the embodiment of the present disclosure, an industrial plant asphalt pavement structure is proposed, including: a structural component, including a fine-grained asphalt concrete part 1, SBS (polystyrene-polybutadiene-polys The invention relates to a roadbed 11 comprising a styrene styrene-butadiene block copolymer) modified emulsified asphalt tack coat oil portion, a medium-grained asphalt concrete portion 3, a lower sealing layer 4, an oil-permeable layer 5, a cement-stabilized steel slag portion, a graded steel slag portion 8, two cloths and one membrane 9 and clay; wherein the fine-grained asphalt concrete portion 1, the SBS modified emulsified asphalt tack coat oil portion 2, the medium-grained asphalt concrete portion 3, the lower sealing layer 4, the oil-permeable layer 5, the cement-stabilized steel slag portion, the graded steel slag portion 8, the two cloths and one membrane 9 and the clay are sequentially laid on a medium-wet type roadbed 11 from top to bottom in the direction of the road surface; a reinforcement portion is laid on the cement-stabilized steel slag portion and is located at the boundaries of both sides of the road surface, and the top of the reinforcement portion is flush with the top of the fine-grained asphalt concrete portion 1; wherein the graded steel slag portion 8 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 portion 8 is greater than or equal to 48 cm.

[0037] At present, the steel industry is a very important pillar industry of the national economy. It plays a very important role in economic construction, social development, fiscal and taxation, national defense construction, and stable employment, and has made a very important contribution to ensuring the sound and rapid development of the national economy. However, the contradictions accumulated by the long-term extensive development of the steel industry have become increasingly prominent, especially environmental protection issues, which have become a very important factor restricting the development of the steel industry. Steel slag is a by-product of the steelmaking process. Its output is huge, and most of it is landfilled or stored as industrial waste, occupying precious land resources and causing secondary pollution.

[0038] The industrial plant asphalt pavement structure provided by the embodiment of the present disclosure is provided with structural components and reinforcement parts. Among them, the structural components are provided with a fine-grained asphalt concrete part 1, an SBS modified emulsified asphalt tack coat oil part 2, a medium-grained asphalt concrete part 3, a lower sealing layer 4, an oil-permeable layer 5, a cement-stabilized steel slag part, a graded steel slag part 8, two cloths and one film 9, and a clay part 10, and the fine-grained asphalt concrete part 1, the SBS modified emulsified asphalt tack coat oil part 2, the medium-grained asphalt concrete part 3, the lower sealing layer 4, the oil-permeable layer 5, the cement-stabilized steel slag part, the graded steel slag part 8, two cloths and one film 9, and the clay part 10 are laid in sequence from top to bottom in the road surface direction on the medium-wet type roadbed 11. And the reinforcement part is laid on the cement-stabilized steel slag part and is located at the boundaries of both sides of the road surface, and the top of the reinforcement part is flush with the top of the fine-grained asphalt concrete part 1. In this way, cement stabilized steel slag part and graded steel slag part 8 are used to replace the crushed stone used in the conventional pavement structure, which reduces the amount of stone used, reduces the mining cost and use cost of stone, and reduces the environmental pollution caused by mining stone. In addition, steel slag, as a by-product of the steelmaking process, is usually landfilled or stored as industrial waste, which occupies precious land resources and produces secondary pollution. Using graded steel slag part 8 to replace part of the crushed stone can achieve secondary utilization of waste, which is more environmentally friendly. On the other hand, the graded steel slag part 8 is compacted in layers with equal thickness, and the thickness of each graded steel slag layer is less than or equal to 20cm, and the total thickness of the graded steel slag part 8 is greater than or equal to 48cm. In this way, the asphalt pavement structure of the industrial plant area can be more suitable for the medium-wet type roadbed 11, so that the asphalt pavement structure of the industrial plant area is not affected by underground capillary water, and the structural strength, mechanical properties and water absorption of the asphalt pavement structure of the industrial plant area are improved, thereby improving the use stability of the asphalt pavement structure of the industrial plant area in the environment of the medium-wet type roadbed 11. The reinforcement part plays the role of edge reinforcement of the asphalt pavement structure of the industrial plant area to prevent vehicles from damaging the edge of the road.

[0039] It can be understood that the maximum particle size of the slag particles of the graded slag part 8 is less than or equal to 37.5mm, the width of the graded slag part 8 relative to each side of the road surface layer is greater than or equal to 30CM, the graded slag part 8 uses granular graded slag, and the nominal maximum particle size of the aggregate of the graded slag part 8 is less than or equal to 53mm; the CBR (California bearing ratio) of the graded slag part 8 is greater than or equal to 120, and the compaction degree of the graded slag part 8 is greater than or equal to 97%. The crushing value of the slag of the graded slag part 8 is less than or equal to 30%, and the maximum particle size of the slag material is less than or equal to 37.5mm. The slag must be decomposed stably, and old slag that has been stored for more than one year should be used. The free calcium oxide content of the old slag should be less than 3%, the metallic iron content in the slag should be less than or equal to 2%, and it should not contain other impurities.

[0040] For example, at a position of 0 cm to 30 cm below the top surface of the medium-wet type roadbed 11, the roadbed compaction is ≥ 0.92, and the CBR is ≥ 5; at a position of 30 cm to 150 cm below the top surface of the medium-wet type roadbed 11, the roadbed compaction is ≥ 0.91, and the CBR is ≥ 3; below 150 cm below the top surface of the medium-wet type roadbed 11, the roadbed compaction is greater than or equal to 0.90, and the CBR is greater than or equal to 2. The rebound model E of the medium-wet type roadbed 11 is ≥ 40 MPa. The maximum particle size of the roadbed filler of the medium-wet type roadbed 11 is less than 100 mm, and garbage and harmful impurities, such as waste magnesium bricks, should be removed.

[0041] It is understood that the clay part 10 is laid on the two cloths and one film 9, and the thickness of the clay is 60cm to 80cm to ensure the performance of the clay layer. The clay used in the clay part 10 should be free of impurities such as domestic garbage and humus.

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

[0043] It can be understood that the two-cloth-one-membrane 9 is provided with two layers of geotextiles and one layer of geomembrane, wherein one layer of geotextile is laid on the clay part 10, and the geomembrane is arranged between the two layers of geotextiles, and the anti-seepage performance of the asphalt pavement structure in the industrial plant area is improved by the two parts and one membrane, and it is more suitable for the medium-wet type roadbed 11. The geotextile can be selected from a composite non-woven fabric geotextile. Specifically, the composite non-woven fabric geotextile can be selected from polyester staple needle-punched geotextile, polyester filament spunbond geotextile, flat fiber plastic woven fabric. The geomembrane can be selected from a plastic material geomembrane. Specifically, the plastic material can be selected from polyvinyl chloride and polyethylene.

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

[0045] It is understandable that the mass of geotextile is 80g / m 2 Up to 600g / m 2 The thickness of the geomembrane is 0.3mm to 2mm to ensure the anti-seepage performance of the two-textile-one-membrane structure and have good structural strength. The fabric mass of the two geotextiles is equal, and the fabric mass of the geotextile / the thickness of the geomembrane is 400g / 0.5mm.

[0046] It is understood that the geomembrane can be glued to the geotextile to ensure the connection stability between the geomembrane and the geotextile. Specifically, in order to ensure the connection strength, 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.

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

[0048] It can be understood that the lower seal layer 4 plays a waterproof and water-tight role, protecting the medium-wet type roadbed 11 from water damage, and the lower seal layer 4 can be used as a maintenance layer for the road surface. Specifically, the thickness of the lower seal layer 4 is 4mm to 7mm, and the asphalt dosage is 0.9kg / m 2 Up to 1.3kg / m 2 The aggregate of the lower sealing layer 4 can be steel slag instead of stone, which reduces the amount of stone used, reduces the cost of stone mining and use, and reduces the environmental pollution caused by stone mining. Steel slag is a by-product of the steelmaking process and is usually landfilled or stored as industrial waste, occupying precious land resources and causing secondary pollution. Using graded steel slag 8 to replace part of the crushed stone can achieve secondary utilization of waste, which is more environmentally friendly. Specifically, the spreading amount of the lower sealing layer 4 is 5 to 8 m / 1000 m 2 Steel slag aggregate, the polishing value of steel slag aggregate is greater than 36.

[0049] In some examples, such as Figure 1 As shown, the cement-stabilized steel slag portion 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] It can be understood that the cement stabilized steel slag part is provided with 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 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%, 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.

[0051] Exemplarily, the first cement-stabilized steel slag layer 6 is a semi-rigid base layer of cement-stabilized steel slag, and the nominal maximum particle size of the aggregate of 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 4MPa≤P; the water expansion rate of the steel slag of the first cement-stabilized steel slag layer 6 is ≤1.5%; the steel slag of the first cement-stabilized steel slag layer 6 must be decomposed and stabilized, and old slag that has been 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.

[0052] Exemplarily, the second cement-stabilized steel slag layer 7 is a semi-rigid base layer of cement-stabilized steel slag, and the nominal maximum particle size of the aggregate of 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≤P; the water expansion rate of the steel slag of the first cement-stabilized steel slag layer 6 is ≤1.5%; the steel slag of the first cement-stabilized steel slag layer 6 must be decomposed and stabilized, and old slag that has been 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 supporting layer 61 and a second supporting layer 62, wherein the first supporting layer 61 is located in the middle of the second supporting layer 62 and protrudes from the second supporting layer 62, the first supporting layer 61 and the road surface layer have the same width, the oil-permeable layer 5 is laid on the first supporting layer 61, and the reinforcement part is arranged on the second supporting layer 62; the second supporting layer 62 is wider than or equal to 30 cm on each side relative to the road surface layer; the second cement-stabilized steel slag layer 7 and the second supporting layer 62 have the same width; wherein the width of the road surface layer is the width of the fine-grained asphalt concrete part 1, and the fine-grained asphalt concrete part 1, the SBS modified emulsified asphalt tack coat part 2, the medium-grained asphalt concrete part 3, the lower sealing layer 4 and the oil-permeable layer 5 have the same width.

[0054] It can be 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. Among them, the second support layer 62 is used to support the first support layer 61, the first support layer 61 is used to support the road surface layer, and the first support layer 61 and the road surface layer have the same width, and the oil-permeable layer 5 is laid on the first support layer 61. The second support layer 62 is wider than or equal to 30 cm on each side relative to the road surface layer, and the reinforcement part is arranged on the second support layer 62 and is 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 width of the fine-grained asphalt concrete portion 1, and the widths of the fine-grained asphalt concrete portion 1, the SBS modified emulsified asphalt tack coat portion 2, the medium-grained asphalt concrete portion 3, the lower seal layer 4 and the above-mentioned oil-permeable layer 5 are the same.

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

[0056] It is understandable that the oil-permeable layer 5 is disposed between the lower sealing layer 4 and the first supporting layer 61 to improve the curing quality and reduce the curing cost. Specifically, the depth of asphalt in the oil-permeable layer 5 penetrating into the first supporting layer 61 is greater than or equal to 5 mm, and the asphalt dosage of the oil-permeable layer 5 is 0.7 L / m 2 Up to 1.5L / m 2 .

[0057] In some examples, the amount of asphalt in the oil layer of the SBS modified emulsified asphalt adhesive layer oil part 2 is 0.3L / m 2 Up to 0.5L / m 2 .

[0058] It can be understood that the SBS modified emulsified asphalt tack layer oil part 2 is arranged between the fine-grained asphalt concrete part 1 and the medium-grained asphalt concrete part 3. The use of SBS modified emulsified asphalt can improve the bonding strength of the tack layer oil and improve the stability. Specifically, the amount of asphalt in the oil layer of the SBS modified emulsified asphalt tack layer oil part 2 is 0.3L / m 2 Up to 0.5L / m 2 .

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

[0060] It is understood that the aggregate particle size of fine-grained asphalt concrete is relatively small, usually between 0mm and 5mm, with good surface flatness and compactness, and improves the quality of the road surface. The aggregate particle size of medium-grained asphalt concrete is moderate, usually between 5mm and 10mm, with good compactness and durability. Specifically, the thickness of the fine-grained asphalt concrete part 1 is 40mm to 60mm; the thickness of the medium-grained asphalt concrete part 3 is 50mm to 80mm to ensure performance.

[0061] In some examples, such as Figure 1 As shown, the reinforcement part includes: a cement mortar layer 13, which is laid on the above-mentioned second supporting layer 62 and is located at the two side boundaries of the above-mentioned road surface layer; a concrete curbstone 12 and a concrete backrest 14 are laid on the above-mentioned cement mortar layer 13, and the top of the above-mentioned concrete curbstone 12 is flush with the top of the above-mentioned fine-grained asphalt concrete part 1.

[0062] It can be understood that the reinforcement part is provided with a cement mortar layer 13, a concrete curb 12 and a concrete backrest 14. The cement mortar layer 13 is laid on the second supporting layer 62, the concrete curb 12 is laid on the cement mortar layer 13, and the top of the concrete curb 12 is flush with the top of the fine-grained asphalt concrete part 1, and the concrete backrest 14 is laid on the cement mortar layer 13 and is located outside the concrete curb 12. The strength of the concrete curb 12 is ≥C50; the strength of the concrete backrest 14 is ≥C30.

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

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

[0065] (2) Filling clay to construct the clay part 10 with a thickness of 60 cm.

[0066] (3) Laying two cloths and one film 9, first laying a mass of 200g / m 2 Polyester staple fiber needle-punched geotextile, followed by 2.00mm thick polyethylene geomembrane, and the final laying mass is 200g / m 2The geotextile is overlapped by cementation, and the overlap length is 5cm.

[0067] (4) Fill the graded steel slag cushion layer in layers to construct the graded steel slag part 8, the layer thickness is not more than 200 mm, the maximum particle size of the steel slag particles is not more than 53 mm, the CBR of the graded steel slag part 8 is ≥120, the compaction degree of the graded steel slag part 8 is ≥97%, and the graded steel slag part 8 is ≥30 cm 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, the cement dosage is 3% to 5%, the total layer thickness is 18 cm to 20 cm, and the second cement-stabilized steel slag layer 7 and the second supporting layer 62 are the same width.

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

[0070] (7) The oil-permeable layer 5 is laid on the top of the first supporting layer 61. The oil-permeable layer 5 is an emulsified asphalt permeable oil layer. The emulsified asphalt permeable oil layer adopts 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 emulsified asphalt penetrating oil layer uses ES-2 type slurry seal as the lower seal layer 4, with a thickness of 6mm.

[0071] (8) The lower sealing layer 4 is laid on the oil-permeable layer 5. The lower sealing layer 4 can be paved with slow-cracking or medium-cracking mixed emulsified asphalt. The asphalt dosage is 0.9 kg / m 2 Up to 1.3kg / m 2 , spreading amount is 5m / 1000m 2 Up to 8m / 1000m 2 The steel slag aggregate is S12 type and has a thickness of 1cm.

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

[0073] (10) Apply SBS modified emulsified asphalt tack coat oil portion 2 on the medium-grained asphalt concrete portion 3.

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

[0075] It should be understood that the terms first, second, etc. are only used to distinguish descriptions and should not be understood as indicating or suggesting 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 unit. For example, the first unit may be referred to as the second unit, and similarly, the second unit may be referred to as the first unit without departing from the scope of the exemplary embodiments of the present invention.

[0076] It should be understood that the term "and / or" in this article is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, B exists alone, and A and B exist at the same time. The term " / and" in this article describes another relationship between associated objects, indicating that two relationships may exist. For example, A / and B can represent two situations: A exists alone, and A and B exist alone. In addition, the character " / " in this article generally indicates that the previous and next associated objects are in an "or" relationship.

[0077] It should be understood that in the description of the present invention, the terms "upper", "vertical", "inside", "outside" and the like indicate orientations or positional relationships that are customarily placed when the disclosed product is used, or are orientations or positional relationships that are customarily understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0078] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "setting", "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0079] The terms used herein are only used to describe specific embodiments and are 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 the opposite meaning. It should also be understood that the terms "include", "comprising", "including", and / or "comprising" when used herein specify the existence of the claimed features, integers, steps, operations, units, and / or components, and do not exclude the existence or increase of one or more other features, quantities, steps, operations, units, components, and / or their combinations.

[0080] Specific details are provided in the following description to facilitate a complete understanding of the exemplary embodiments. However, it should be understood by those of ordinary skill in the art that the exemplary embodiments may be implemented without these specific details. In other embodiments, well-known processes, structures, and techniques may not be shown in unnecessary detail to avoid making the exemplary embodiments unclear.

[0081] The above is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

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

Claims

1. An asphalt pavement structure for an industrial plant, characterized in that: include: The structural components include a fine-grained asphalt concrete part, an SBS modified emulsified asphalt tack coat part, a medium-grained asphalt concrete part, a lower seal layer, an oil-permeable layer, a cement-stabilized steel slag part, a graded steel slag part, two cloths and one membrane, and a clay part; wherein the fine-grained asphalt concrete part, the SBS modified emulsified asphalt tack coat part, the medium-grained asphalt concrete part, the lower seal layer, the oil-permeable layer, the cement-stabilized steel slag part, the graded steel slag part, the two cloths and one membrane, and the clay part are laid in sequence from top to bottom in the road surface direction on a medium-wet type roadbed; A reinforcement part is laid on the cement-stabilized steel slag part and is located at the boundaries of both sides of the road surface, and the top of the reinforcement part is flush with the top of the fine-grained asphalt concrete part; Wherein, the graded steel slag portion is compacted in layers with 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 portion is greater than or equal to 48 cm.

2. The straight section railway structure of an industrial plant according to claim 1, characterized in that: The two cloths and one membrane include: Two layers of geotextiles and one layer of geomembrane, wherein the geomembrane is arranged between the two layers of geotextiles; Among them, the geotextile is a geotextile made of composite non-woven fabric; and the geomembrane is a geomembrane made of plastic.

3. The industrial plant asphalt pavement structure according to claim 2 is characterized in that: The mass of the geotextile is 80g / 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 means of viscose, 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.

4. The industrial plant asphalt pavement structure according to claim 1, characterized in that: The thickness of the lower sealing layer is 4mm to 7mm, and the amount of asphalt is 0.9kg / m 2 Up to 1.3kg / m 2 The spreading amount of the lower sealing layer is 5-8m / 1000m 2 The steel slag aggregate has a polishing value greater than 36.

5. The industrial plant asphalt pavement structure according to claim 1, characterized in that: The cement stabilized slag unit comprises: a first cement-stabilized steel slag layer and a second cement-stabilized steel slag layer; Among them, the first cement-stabilized steel slag layer is laid on 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.

6. The industrial plant asphalt pavement structure according to claim 5, characterized in that: The first cement-stabilized slag layer is provided with a first supporting layer and a second supporting layer, wherein the first supporting layer is located in the middle of the second supporting layer and protrudes from the second supporting layer, the first supporting layer and the road surface layer have the same width, the oil-permeable layer is laid on the first supporting layer, and the reinforcement part is arranged on the second supporting layer; the second supporting layer is wider than the road surface layer on each side by a size greater than or equal to 30 cm; The second cement-stabilized slag layer and the second supporting layer have the same width; Among them, 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 part, the medium-grained asphalt concrete part, the lower seal layer and the oil-permeable layer are the same.

7. The industrial plant asphalt pavement structure according to claim 6, characterized in that: The depth of asphalt in the oil-permeable layer penetrating into the first supporting layer is greater than or equal to 5 mm, and the amount of asphalt in the oil-permeable layer is 0.7 L / m 2 Up to 1.5L / m 2 .

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

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

10. The industrial plant asphalt pavement structure according to claim 6, characterized in that: The reinforcement portion comprises: A cement mortar layer is laid on the second supporting layer and is located at the boundaries of both sides of the road surface layer; The concrete curbstone and the concrete backrest are laid on the cement mortar layer, and the top of the concrete curbstone is flush with the top of the fine-grained asphalt concrete part.

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