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Stress-decomposed pavement structure layer

A technology of pavement structure and stress decomposition, applied in the direction of roads, roads, pavement details, etc., can solve problems such as lateral cracks in asphalt concrete pavement, and achieve the effect of improving construction technology, preventing lateral cracks, and enhancing longitudinal flexural tensile strength

Inactive Publication Date: 2020-12-08
CHANGAN UNIV
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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

Method used

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  • Stress-decomposed pavement structure layer
  • Stress-decomposed pavement structure layer
  • Stress-decomposed pavement structure 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 explanations of the present invention rather than limitations.

[0029] Analyzing the cause of cracks is the root of solving the problem of pavement cracking. Cracks are mainly caused by expansion and contraction stress, including the internal force of the material itself, the external force applied by the outside world, and the fatigue caused by the repeated action of internal force and external force. In the entity, this Several stresses exist objectively. Through stress analysis, to make an object crack, the stress applied to the object must be 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 strength of the road materia...

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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 in particular relates to a stress-decomposed road surface structure layer. Background technique [0002] The total mileage of China's expressways has reached 131,000 kilometers, ranking first in the world. Among the completed expressways, more than 90% are semi-rigid 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 quality problems that need to be solved most in the current asphalt concrete pavement, especially the transverse cracks in the semi-rigid base asphalt concrete pavement structural layer. In order to prevent cracks, people have spent a lot of manpower, financial resources and energy, but the problem of cracks in asphalt concrete pavement has not been fundamentally solved. [0003] In the design of asphalt concrete pavement, a strong base an...

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Application Information

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Patent Type & Authority Patents(China)
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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