Design method of composite concrete overlay structure for repairing road intersection

A technology for structural design and concrete, which is applied to cohesive pavement paved on site, roads, roads, etc., to achieve good bonding, reduce construction costs, and reduce disease effects

Inactive Publication Date: 2018-12-14
GUANGXI JINMENG ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional asphalt pavement repair method cannot fundamentally reduce the occurrence of rutting

Method used

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  • Design method of composite concrete overlay structure for repairing road intersection
  • Design method of composite concrete overlay structure for repairing road intersection
  • Design method of composite concrete overlay structure for repairing road intersection

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Such as Figure 1-5 As shown, a method for designing a combined concrete overlay structure at the intersection of repaired roads is provided, including the following steps:

[0039] Step 1. Evaluate the bearing capacity of the existing asphalt pavement by using the dynamic cone penetrometer. The dynamic cone penetrometer detects the penetration rate to obtain the California bearing ratio CBR and elastic modulus E:

[0040] CBR = 292 / PR 1.12

[0041] E(MPa) = 17.58×CBR 0.64

[0042] In the formula, CBR is the California bearing ratio, (%); PR is the penetration rate of the dynamic cone penetrometer test, (mm / hammer time); if the existing pavement is under weak support, go to step 2, otherwise Go to step three.

[0043] Step 2: Reinforce the existing pavement to achieve sufficient supporting capacity until the existing asphalt pavement includes at least 50 mm of asphalt surface layer and at least 150 mm thick base layer with a strength greater than 345 MPa.

[0044]...

Embodiment 2

[0050] Embodiment 2: The difference between this embodiment and Embodiment 1 lies in that the method used to evaluate the bearing capacity of the existing asphalt pavement in step 1 is a drop weight deflection tester.

Embodiment 3

[0051] Embodiment 3: The difference between this embodiment and Embodiment 1 is that in step 1, the method used to evaluate the bearing capacity of the existing asphalt pavement is the combined evaluation of the drop weight deflectometer and the dynamic cone penetrometer.

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Abstract

The invention provides a design method for repairing the combined concrete overlay structure at the intersection of roads. 2, reinforcing the existing pavement to achieve sufficient supporting capacity; 3, treating that surface of the asphalt concrete road; For the disease with rut depth less than 50mm, no milling is needed, and step 4 is carried out. 4, directly paving a white cover on that surface of the concrete pavement; Step 5: carrying out Reasonable thickness design and joint cutting design and construction. As that combine cement concrete overlay is used as a way of repair the asphaltpavement at the road intersection, the durability of the service performance of the combined cement concrete overlay at the road intersection and the economy of the life cycle cost can be effectivelyrealized.

Description

technical field [0001] The invention belongs to the field of road maintenance and repair, and in particular relates to a method for designing a combined concrete overlay structure for repairing road intersections. Background technique [0002] With the action of traffic load and environmental load, the performance of asphalt concrete pavement gradually deteriorates. At road intersections using asphalt concrete pavement, the diseases caused by plastic deformation such as rutting, wrapping, and waves are particularly obvious. It is mainly caused by frequent vehicle braking, serious traffic channelization and insufficient shear strength of asphalt concrete. [0003] Defects such as rutting seriously affect driving safety at road intersections in rainy days. The traditional asphalt pavement repair method cannot fundamentally reduce the occurrence of rutting. Cement concrete pavement has no rutting disease and good traffic load resistance performance, which can improve the dri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C7/18
CPCE01C7/187
Inventor 闫强杜荣耀卢军源易强
Owner GUANGXI JINMENG ENG
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