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Stress segmentation-type pavement structural layer

A pavement structure and stress decomposition technology, applied in the directions of roads, roads, pavement details, etc., can solve problems such as lateral cracks in asphalt concrete pavement, improve construction technology, enhance longitudinal flexural tensile strength, and reduce later maintenance costs.

Inactive Publication Date: 2019-07-26
CHANGAN UNIV
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  • Abstract
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Problems solved by technology

[0004] Aiming at the problems existing in the prior art, the present invention provides a stress-decomposed pavement structure layer, which can solve the problem of transverse cracks in the asphalt concrete pavement

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  • Stress segmentation-type pavement structural layer
  • Stress segmentation-type pavement structural layer
  • Stress segmentation-type pavement structural layer

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Embodiment Construction

[0028] The present invention will be further described in detail below in conjunction with specific embodiments, which are for explanation rather than limitation of the present invention.

[0029] Analyzing the cause of cracks is the fundamental solution to the problem of pavement cracking. The cracks are mainly caused by expansion and contraction stress, including the internal force of the material itself, the external force exerted by the outside, and the fatigue caused by the repeated action of internal and external forces. In the entity, this Several kinds of stress exist objectively. Through stress analysis, to make the object crack, the stress applied to the object is greater than the crack resistance of the object itself, and the stress applied to the road is a cumulative force, which is proportional to the longitudinal length of the road. When the length reaches a certain value , When the stress accumulates to be greater than the crack resistance of the road material, a c...

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Abstract

The invention discloses a stress segmentation-type pavement structural layer. Joint-type stress bars are laid longitudinally in a structural layer of asphalt concrete pavement, the joint-type stress bars laid on an upper layer can prevent cracks generated by traffic loads and climate change, laid on a lower layer can prevent reflection cracks of a base layer, and laid on the base layer can preventcracks appearing on the base layer in the hardening process. According to the stress segmentation-type pavement structural layer, the problem of the horizontal cracks of a road is solved, the servicelife of the road is prolonged, later supporting of the road is delayed, the thickness of a pavement surface layer is reduced, and a pavement structure of a strong-base thin surface can be realized.

Description

Technical field [0001] The invention belongs to the field of road engineering, and specifically relates to a stress decomposition type pavement structure layer. Background technique [0002] The total mileage of highways in China has reached 131,000 kilometers, ranking first in the world. Among the highways built, more than 90% are semi-rigid base asphalt concrete pavements. With the increasing progress of national science and technology, quality engineering has become the focus. From the perspective of roads, road cracking is one of the most important quality problems for asphalt concrete pavement. The transverse cracks of the semi-rigid base asphalt concrete pavement structure are the most prominent. In order to prevent cracks, people have spent a lot of manpower, financial resources and energy, but have not yet fundamentally solved the problem of cracks in asphalt concrete pavements. [0003] In the design of asphalt concrete pavement, a strong base thin surface should be used....

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Application Information

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IPC IPC(8): E01C7/32E01C11/16
CPCE01C7/32E01C11/165
Inventor 周志军苏毅徐天宇任晨宁
Owner CHANGAN UNIV
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