Asphalt pavement structure for urban tunnel deformation seam and paving method thereof

An asphalt pavement and deformation joint technology, which is applied in the field of transportation engineering, can solve the problems affecting the service performance and driving comfort of the asphalt pavement, reduce reflection cracks and water seepage, improve flexibility, good fatigue resistance and water tightness Effect

Inactive Publication Date: 2019-09-27
南京城建隧桥智慧管理有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the pavement structure can alleviate the propagation speed of reflective cracks to a certain extent, reflective cracks can still extend to the road surface in a short time, seriously affecting the performance and driving comfort of asphalt pavement.

Method used

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  • Asphalt pavement structure for urban tunnel deformation seam and paving method thereof
  • Asphalt pavement structure for urban tunnel deformation seam and paving method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0035] like figure 1 as shown,

[0036] A kind of asphalt pavement structure that is used for the deformation joint of urban tunnel, described asphalt pavement structure comprises the stress absorbing layer 1 of laying from bottom to top, asphalt concrete lower layer 2 and asphalt concrete upper layer 3; Wherein, described stress absorbing layer is The normal temperature thermosetting modified asphalt binder 4 is composed of gravel; the asphalt concrete upper layer 3 and the asphalt concrete lower layer 2 are respectively paved with normal temperature thermosetting modified asphalt mixture.

[0037] Further, the total pavement thickness of the asphalt pavement structure is 7-10cm.

[0038] Further, the stress absorbing layer 1 is made by the following method: put the prepared normal temperature thermosetting modified asphalt binder 4 into the asphalt spreader, and spray it on the top of the base layer through the nozzle of the asphalt spreader On the surface, then sprinkle 5...

Embodiment 1

[0056] (1) Old road surface treatment

[0057] Taking the deformation joint as the center, use a milling machine to first mill out a 3cm-thick upper layer with a width of 120cm; then, mill out a 3cm-thick lower layer with a width of 90cm; then, Vacuum cleaners and hot air blowers are used to clean the dust and residual old asphalt mixture on the newly exposed road surface and dry the surface of the old road surface to ensure the cleanliness and dryness of the top surface of the old road surface.

[0058] (2) Implementation of stress absorbing layer

[0059] Mix the components D and G of the normal temperature thermosetting asphalt binder at a mass ratio of 1:1.8 at 30°C, and then use a small emulsified asphalt spreader to spray the mixed normal temperature thermosetting modified asphalt on the road surface Then, sprinkle single-size aggregates with a particle size of 5-10 mm at a coverage rate of 65% to form a stress-absorbing layer with a width of 90 cm and a thickness of 1 ...

Embodiment example 2

[0067] (1) Old road surface treatment

[0068] With the deformation joint as the center, use a milling machine to mill out a 3cm-thick upper layer with a width of 120cm; then, mill out a 4cm-thick lower layer with a width of 100cm; then, Vacuum cleaners and hot air blowers are used to clean the dust and residual old asphalt mixture on the newly exposed road surface and dry the surface of the old road surface to ensure the cleanliness and dryness of the top surface of the old road surface.

[0069] (2) Implementation of stress absorbing layer

[0070] Mix the components D and G of the normal temperature thermosetting asphalt binder at a mass ratio of 1:1.8 at 23°C, and then use a small emulsified asphalt spreader to spray the mixed normal temperature thermosetting modified asphalt on the road surface Then, sprinkle single-size aggregates with a particle size of 5-10 mm at a coverage rate of 80% to form a stress-absorbing layer with a width of 100 cm and a thickness of 1 cm.

...

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Abstract

The invention discloses an asphalt pavement structure for an urban tunnel deformation seam and a paving method thereof. The asphalt pavement structure for the deformation seam comprises a stress absorbing layer, an upper asphalt concrete surface layer and an upper asphalt concrete surface layer which are arranged from bottom to top, wherein the stress absorbing layer is manufactured through normal-temperature thermoset modified asphalt adhering material; and the upper asphalt concrete surface layer and the lower asphalt concrete surface layer are paved through normal-temperature type thermoset modified asphalt mixtures of different formulas. With the adoption of the deformation seam pavement paving structure, the reflection crack resisting performance and the flexibility of the deformation seam pavement structure are obviously improved, the water sealing performance of paving is ensured, the normal-temperature construction of an asphalt pavement is achieved, and the construction energy is extremely reduced; and reliable basis is supplied to rapid repairing of the tunnel deformation seam asphalt pavement.

Description

technical field [0001] The invention belongs to the technical field of traffic and transportation engineering, and relates to an asphalt pavement structure used for urban tunnel deformation joints and a paving method thereof. Background technique [0002] In recent years, with the continuous development of road traffic and urban construction, a large number of urban tunnels have emerged, and the asphalt pavement near the tunnel deformation joints is extremely fragile during tunnel operation. Due to the large temperature difference in the tunnel and the repeated action of vehicle loads, the pavement structure around the deformation joints is prone to reflective cracks, potholes and other diseases, while the road surface water, the groundwater at the tunnel pipe joints or sections often flow along the road surface. Cracks, adjacent pipe joints or joints of joints penetrate into the deformed pavement structure, seriously affecting the performance of the asphalt pavement structu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/18E01C7/22E01C23/06C08L95/00C08L63/00C08L79/02C08L47/00
CPCC08L63/00C08L95/00C08L2205/025C08L2205/03E01C7/18E01C7/22E01C23/065C08L79/02C08L47/00
Inventor 李志来郭屹忠周军朱吉鹏杨若冲
Owner 南京城建隧桥智慧管理有限公司
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