A method and structure for solving rigid-flexible overlap before road overlaying

A rigid-flexible, old-pavement technology, applied in the direction of roads, roads, pavement details, etc., can solve problems such as influence, bad society, and influence on the performance of overlays, and achieve the effect of mature technology, improved service life, and reduced impact.

Active Publication Date: 2017-07-07
FUZHOU PLANNING DESIGN & RES INST
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Problems solved by technology

[0003] It has been found in practice that if the rigid-flexible joint longitudinal joints between the old cement pavement and the asphalt pavement are not properly dealt with during the renovation process, the directly overlaid asphalt concrete layer will lose rigidity and flexibility under the action of external traffic loads and temperature cycles. The overlapping longitudinal joints will quickly reflect to the asphalt concrete layer, forming longitudinal reflection cracks in the asphalt concrete layer, seriously affecting the performance of the overlay layer, and causing adverse social impact

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  • A method and structure for solving rigid-flexible overlap before road overlaying
  • A method and structure for solving rigid-flexible overlap before road overlaying

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Embodiment Construction

[0018] Such as figure 1 As shown, the standard cross-sectional diagram of the road surface structure before the renovation, the road surface of the non-motor vehicle lane in the old pavement structure is the upper layer 1 (made of 4cmAC-16 medium-grained asphalt concrete) and the lower layer 2 (made of 7cmATB -25 densely graded asphalt stabilized gravel) and cement stabilized gravel base 3 and 15cm mountain stone cushion 4;

[0019] The road surface of the motorway in the old pavement structure consists of cement layer 5-1 (composed of 22cmC35 cement concrete), 20cm thick cement stabilized gravel base 3 and 15cm mountain stone cushion 4 from top to bottom; in addition, It also includes the longitudinal joint at the junction of the old asphalt pavement and the old cement pavement, the longitudinal joint 10 of the cement pavement itself, and the tie rod 11 between the longitudinal joints of the cement pavement.

[0020] Above-mentioned 1,2,3,4,5-1,10,11 all belong to old struct...

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Abstract

The invention provides a method and structure for achieving a rigid-soft overlapping joint before pavement paving. Different lanes are provided with different old pavement structures. The old pavement structure of a motor vehicle lane is a cement pavement, and the old pavement structure of a non-motor vehicle lane is an asphalt pavement. The old cement pavement of the motor vehicle lane is treated through a rubblization technology, and then the whole fracture surface is uniformly paved with at least one asphalt concrete layer. According to the method and structure, the old cement pavement approximates the old asphalt pavement in equivalent modulus of elasticity after being treated through the rubblization technology, so that the influence on a newly-paved asphalt face layer of a rigid-soft overlapping longitudinal gap is reduced; longitudinal reflection cracks of the pavements are delayed; the service life of the pavements is prolonged.

Description

technical field [0001] The invention relates to a method and a structure for solving rigid-flexible overlapping before road overlaying. Background technique [0002] Cement pavement has the advantages of high strength, strong load capacity, wear resistance, and impact resistance, while asphalt pavement has the advantages of good toughness, no joints, low noise, and fast construction. Therefore, in the 1990s, the standard sections of municipal roads in some areas adopted the combination of the two pavement structures, and the pavement structure of motor vehicles was designed as cement pavement, and the pavement structure of non-motor vehicles was designed as asphalt pavement. In recent years, in order to improve the service performance of the pavement, large-scale reconstruction of this type of pavement with asphalt has been carried out. [0003] It has been found in practice that if the rigid-flexible joint longitudinal joints between the old cement pavement and the asphalt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C11/02E01C11/06
Inventor 蔡叶澜黄金龙
Owner FUZHOU PLANNING DESIGN & RES INST
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