Arched base pavement structure

A technology of pavement structure and base layer, applied in the direction of roads, roads, buildings, etc., can solve the problems of high construction technology level and high cost, and achieve the effect of facilitating later maintenance, repair and replacement, convenient construction, and eliminating fatigue damage.

Inactive Publication Date: 2016-12-07
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of pavement structure is expensive and

Method used

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  • Arched base pavement structure
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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0034] Implementation example 1

[0035] As the junction of rigid abutment and flexible embankment, the transition section of road and bridge is prone to uneven settlement. The main difference is that the lower abutment of the bridge is rigidly supported with little deformation, while the soil base layer 1 support of the road is a flexible support. The arch base 4 structure described in the present invention, such as Image 6 As shown, according to road mechanics calculations and actual conditions on site, adjust the H / L ratio to gradually change the stiffness of the transition section between roads and bridges, thereby minimizing the difference in settlement between roads and bridges, roughly using the upper layer 4cm fine-grained asphalt concrete + middle Layer 6cm medium-grain asphalt concrete + 8cm coarse-grain asphalt concrete + 2cm asphalt fiber sealing layer + 15cm vault, 40cm lean concrete + 5% cement stabilized gravel + soil base 1. When the invention is used in special...

Example Embodiment

[0036] Implementation example 2

[0037] In the application of road sections with poor foundation conditions such as soft foundations and broken foundations, when the foundation conditions are poor and difficult to handle, just as the principle of strengthening support members 8 mentioned above is known, this can effectively prevent uneven settlement, weaken uneven or relatively Poor soil base layer 1 has an impact on the stability and bearing capacity of the upper structure, but considering economy and support effectiveness, strengthening support members 8 can be arranged at the bottom end of the base layer 4 at regular intervals.

Example Embodiment

[0038] Implementation example 3

[0039] In the application of urban roads with many pipes and line segments, when municipal roads, drainage pipe E is not used for drainage, but used to bury urban pipelines to prevent too many pipes and lines from affecting the city appearance. At the same time, the drainage pipe itself can be waterproof. A drainage gravel cushion is used around the drainage pipe to prevent groundwater from affecting the upper structure. Water can also be concentrated on the upper part and then discharged through the arched roadbed through the drainage ditch, so as not to affect the normal use of the road structure.

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Abstract

The invention discloses an arched base pavement structure. The arched base pavement structure comprises two road shoulders, prestress pull rods, a soil base course, a subbase course, a base course, a middle course and an upper surface course, wherein the soil base course, the subbase course, the base course, the middle course and the upper surface course are arranged between the two road shoulders and distributed from bottom to top in sequence; the base course is of an arched structure; the soil base course is provided with a plurality of pairs of reinforcement supporting components; the two ends of the base course are located on two of the multiple pairs of reinforcement supporting components; and one ends of the prestress pull rods are fixed to the outer side surface of the first road shoulder, and the other ends of the prestress pull rods penetrate through the first road shoulder, the base course, the subbase course and the second road shoulder and are fixed to the outer side surface of the second road shoulder. According to the arched base pavement structure, bottom course tensile stress of an asphalt pavement or top surface compression strain of the soil base course can be effectively reduced, fatigue damage of the asphalt pavement is reduced, and the service life of the asphalt pavement is prolonged.

Description

technical field [0001] The invention belongs to the technical field of asphalt and relates to an arched base pavement structure. Background technique [0002] In my country, asphalt pavement is one of the main structural forms of roads, accounting for most of the market share. Most of them can maintain a good running state after they are completed and put into use. However, it cannot be ignored that there are still some asphalt pavements that appear in a short period of use, including cracking, wrapping, spalling, oil flooding, and rutting. In the early stage, more than 92% of the asphalt pavements have an average life cycle of about 7 to 8 years, which has a negative impact on driving comfort and safety, and causes a certain waste of economy and resources. [0003] my country's current "Asphalt Pavement Design Code" (JTG D50-2006) stipulates that: according to the economic and traffic development conditions and the position of the road in the road network, considering the ...

Claims

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Application Information

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IPC IPC(8): E01C3/02
CPCE01C3/02
Inventor 申爱琴王旭辉阮诚皓覃潇
Owner CHANGAN UNIV
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