8 results about "Subbase (pavement)" patented technology

The invention relates to the technical field of roadbed structures, and particularly discloses a bubble light soil roadbed structure which comprises an underlayer, a pavement structure layer, a bubble mixed light soil layer and a prefabricated reinforced concrete slab interlayer. The underlayer and the pavement structure layer are arranged at an interval, and the bubble mixed light soil layer is arranged between the underlayer and the pavement structure layer; the prefabricated reinforced concrete slab interlayer is arranged in the bubble mixed light soil layer, and the prefabricated reinforced concrete slab interlayer and the bottom layer as well as the prefabricated reinforced concrete slab interlayer and the pavement structure layer are separately arranged at intervals; wherein the prefabricated reinforced concrete slab interlayer comprises a plurality of concrete slab single bodies and a reinforcing mesh, and the reinforcing mesh is at least partially connected to the plurality of concrete slab single bodies in a penetrating mode. By arranging the prefabricated reinforced concrete slab interlayer, the compression resistance, shear resistance and bending resistance of the whole bubble light soil roadbed structure are remarkably improved, and the bubble light soil roadbed structure can be applied to scenes with higher requirements for the bearing capacity.

The invention discloses an asphalt pavement paving structure suitable for heavy traffic and a paving method thereof, and relates to the technical field of pavement design, and the structure comprises a subbase layer, a base layer, a reinforcing layer and a surface layer which are sequentially arranged from bottom to top in the vertical direction. The reinforcing layer is additionally arranged between the base layer and the surface layer, the fiber anti-crack waterproof coiled material layer has flexibility and tensile strength, reflection cracking of the base layer can be effectively inhibited, water erosion can be blocked, the upper gravel layer and the coiled material form a good embedding and extruding effect, and the interlayer anti-shearing capacity is remarkably improved; the three layers of fiber nets are arranged in the surface layer, temperature shrinkage cracks and load stress cracks of different surface layers are effectively restrained through built-in engagement among the fiber nets, the asphalt and the gravel, the problem that cracks of an existing pavement frequently occur is solved, and the service life of the asphalt pavement is prolonged.

The utility model discloses a durable high-modulus asphalt mixture pavement structure which comprises the following layered structures: an upper surface layer: high-modulus asphalt mixture with the thickness of 3-5cm; the middle layer is modified asphalt concrete with the thickness of 6-8 cm; the lower surface layer is high-modulus asphalt stabilized macadam with the thickness of 8-10 cm; the base layer is made of cement stabilized macadam with the thickness of 15-20 cm; the subbase layer is graded broken stone, the thickness is 20-25 cm, by arranging the high-modulus upper surface layer, the transition middle layer and the rigid lower surface layer, mechanical property gradient distribution is formed, load stress is dispersed, and regenerated rubber powder and synthetic resin are adopted for compounding a modifier, so that the high and low temperature performance is balanced. The utility model belongs to the field of road engineering materials, and particularly relates to a durable high-modulus asphalt mixture pavement structure.

This invention discloses a low-carbon footprint road stabilization layer material and method based on recycled sand production tailings, belonging to the fields of road construction materials, solid waste disposal, and carbon neutrality technology. This invention replaces all fine aggregates with recycled sand production tailings. Road stabilization layers prepared using this invention exhibit the following 7-day unconfined compressive strengths: base course ≥ 3.0 MPa, subbase course ≥ 2.0 MPa; 28-day base course ≥ 5.0 MPa, subbase course ≥ 3.0 MPa; 7-day water immersion strength loss ≤ 13%. The overall performance meets the industry standard JTG / T F20-2015 "Technical Specifications for Highway Pavement Base Course Construction," reducing costs by 18%~30% and carbon emissions by 30%~50%. It achieves resource utilization of sand production tailings, is compatible with existing construction equipment, and is suitable for base and subbase construction of Class I to IV highways and municipal roads, combining environmental friendliness and engineering economy.

This invention discloses a low-temperature crack-resistant composite modified asphalt pavement structure, relating to the field of asphalt concrete pavement technology. It solves the technical problem of lacking an asphalt pavement structure that can reduce thermal shrinkage cracking in low-temperature environments without affecting the bonding effect between the base course and the asphalt surface layer and with low construction difficulty. The invention comprises, from top to bottom, a dense composite modified asphalt concrete top layer, a dense-graded composite modified asphalt concrete intermediate layer, a dense-graded modified asphalt concrete fatigue-resistant bottom layer, a modified asphalt synchronous chip seal, a crack-resistant cement-stabilized crushed stone base course, a crack-resistant cement-stabilized crushed stone subbase course, and a subbase. A modified emulsified asphalt bonding layer is provided between the top layer, intermediate layer, and bottom layer. A common emulsified asphalt tack coat is provided between the synchronous chip seal and the base course. The purpose is to enhance the bonding between the various structural layers of the pavement and ensure the shear resistance of the pavement structural layers.

The utility model discloses a low-carbon anti-crack pavement base structure. The low-carbon anti-cracking pavement base structure comprises a modified asphalt mixture upper surface layer, a modified asphalt concrete middle surface layer, an asphalt concrete lower surface layer, an asphalt stabilized macadam flexible upper base layer, a lower sealing layer, a super sulfate cement fiber stabilized macadam lower base layer, a super sulfate cement stabilized macadam subbase layer and subgrade soil from top to bottom, the pavement base structure disclosed by the utility model can meet the structural bearing capacity and fully utilize the recycled aggregate, has the advantages of low carbon, crack resistance and high toughness, reduces the generation of dry shrinkage and temperature shrinkage cracks, enhances the durability of a road base and prolongs the service life of a road.

The utility model relates to a thinned cement concrete roadbed and pavement structure based on fine-grained tailing soil, and belongs to the field of road engineering and environmental geotechnical engineering. The roadbed and pavement structure comprises a cement concrete surface layer, a cement stabilized macadam base layer, a thinned lime stabilized fine grain tailing soil subbase layer, a thinned lime stabilized fine grain tailing soil upper roadbed and a thinned lime stabilized fine grain tailing soil lower roadbed, the subgrade pavement structure is sequentially paved with a thinned lime-stabilized fine-grained tailing soil lower roadbed, a thinned lime-stabilized fine-grained tailing soil upper roadbed, a thinned lime-stabilized fine-grained tailing soil subbase layer, a cement-stabilized macadam base layer and a cement concrete surface layer from bottom to top. According to the thinned cement concrete roadbed pavement structure based on the fine-grained tailing soil, the thicknesses of the subbase layer, the upper roadbed and the lower roadbed are reduced through the higher mechanical property of the fine-grained tailing soil, so that the subbase layer, the upper roadbed and the lower roadbed are compacted better in the construction process, and the construction difficulty is reduced.

The invention discloses a low-carbon economical semi-rigid base asphalt pavement durable structure which comprises four semi-rigid bases, a modified asphalt waterproof bonding layer I, an asphalt concrete lower surface layer, a modified asphalt waterproof bonding layer II and an asphalt concrete upper surface layer which are arranged layer by layer from bottom to top, the four semi-rigid base layers comprise a semi-rigid material lower subbase layer, a semi-rigid material upper subbase layer, a semi-rigid material lower base layer and a semi-rigid material upper base layer from bottom to top, and the overall structure thickness is 84-92 cm. The whole structure adopts a form of'thin asphalt layer + high-quality semi-rigid base layer ', the total thickness of the asphalt surface layer is 12cm which is reduced by 30% compared with the thickness of the asphalt surface layer which is more than 18cm and is generally adopted by the existing domestic structure, and the base layer is increased by one layer compared with the traditional structure layer, so that the bearing capacity of the pavement can be obviously improved, and the strength of the pavement is enough to bear the repeated action of heavy traffic; and the double waterproof bonding layers are arranged in the structure, so that the problem of water damage is effectively solved.