A Construction Method for Strengthening the Structural Strength of Jointed Cement Concrete Pavement

A cement concrete and pavement structure technology, applied in roads, roads, road repairs, etc., can solve the problems of inability to effectively reduce reflection cracks and high cost, achieve good load transfer performance, reduce pavement thickness, and enhance structural strength.

Inactive Publication Date: 2016-06-15
CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Asphalt overlays cannot effectively reduce reflective cracks and are prone to early disease under heavy traffic loads
Another way is to replace the old concrete pavement slab, this method is suitable for more serious pavement disease road sections, and has the characteristics of high cost

Method used

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  • A Construction Method for Strengthening the Structural Strength of Jointed Cement Concrete Pavement
  • A Construction Method for Strengthening the Structural Strength of Jointed Cement Concrete Pavement
  • A Construction Method for Strengthening the Structural Strength of Jointed Cement Concrete Pavement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] see figure 1 , figure 2 , image 3 , Figure 4 and Figure 5 , the construction method of enhancing the structural strength of joint cement concrete pavement, the construction steps are as follows:

[0042] Step (1), determine the unstable pavement slab in the repaired road section according to the joint load transfer capacity and maximum deflection value:

[0043] The joint load transfer capacity and deflection value are detected and determined by the drop weight deflection meter. Unstable pavement slabs whose joint load transfer coefficient is less than 40% and / or the deflection value is greater than 0.89mm when the design load is 100kN need to be tested. Repair; the calculation method of load transfer coefficient is as follows:

[0044] k j =(w u / w l )×100

[0045] where k j is the joint load transfer coefficient, (%); w u is the deflection value at the edge of the unloaded plate joint, (0.01mm); w l is the deflection value at the edge of the joint of t...

Embodiment 2

[0057] see figure 1 , figure 2 , image 3 , Figure 4 and Figure 5 , the construction method of enhancing the structural strength of joint cement concrete pavement, the construction steps are as follows:

[0058] Step (1), determine the unstable pavement slab in the repaired road section according to the joint load transfer capacity and maximum deflection value:

[0059] The joint load transfer capacity and deflection value are detected and determined by the drop weight deflection meter. Unstable pavement slabs whose joint load transfer coefficient is less than 40% and / or the deflection value is greater than 0.89mm when the design load is 100kN need to be tested. Repair; the calculation method of load transfer coefficient is as follows:

[0060] k j =(w u / w l )×100

[0061] where k j is the joint load transfer coefficient, (%); w u is the deflection value at the edge of the unloaded plate joint, (0.01mm); w l is the deflection value at the edge of the joint of t...

Embodiment 3

[0073] see figure 1 , figure 2 , image 3 , Figure 4 and Figure 5 , the construction method of enhancing the structural strength of joint cement concrete pavement, the construction steps are as follows:

[0074] Step (1), determine the unstable pavement slab in the repaired road section according to the joint load transfer capacity and maximum deflection value:

[0075] The joint load transfer capacity and deflection value are detected and determined by the drop weight deflection meter. Unstable pavement slabs whose joint load transfer coefficient is less than 40% and / or the deflection value is greater than 0.89mm when the design load is 100kN need to be tested. Repair; the calculation method of load transfer coefficient is as follows:

[0076] k j =(w u / w l )×100

[0077] where k j is the joint load transfer coefficient, (%); w u is the deflection value at the edge of the unloaded plate joint, (0.01mm); w l is the deflection value at the edge of the joint of t...

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Abstract

The invention discloses a construction method for enhancing the structural strength of jointed cement concrete pavement, which includes repairing the unstable road slab with poor joint load transfer capacity and relatively large deflection value, and adopting the form of direct overlay layer of combined continuous reinforced concrete 1. Arrange tie rods at the transverse joints corresponding to the existing pavement and specially designed tie rods at the longitudinal joints. Specially designed tie rod interfaces are preset at both ends of the overlay layer, and asphalt concrete is used as the transition section, which provides convenience for the next stage of overlay layer construction. The pavement repair technology can be used in heavy traffic, jointed cement concrete pavement diseased road sections, and has the superior performance of resisting heavy traffic loads, prolonging the service life of the pavement and preventing early diseases. At the same time, it has good durability and economy.

Description

technical field [0001] The invention relates to a construction method for enhancing the structural strength of a jointed cement concrete pavement, in particular to a method for directly adding a layer of combined continuous reinforced concrete to enhance the structural strength of a jointed cement concrete pavement. Background technique [0002] With the rapid increase of vehicle axle load and the increase of service life, many joint cement concrete pavements have approached or exceeded the design traffic volume. The jointed concrete pavement that increases year by year has entered the stage of repair and maintenance. A reasonable maintenance repair method must have two important characteristics of durability and economy. [0003] Traditional joint cement concrete pavement repair methods usually use asphalt overlay, the main reason is that asphalt overlay is economical and can effectively improve driving comfort and safety. This method is often applicable to the early stag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C23/03E01C23/04
Inventor 陈达豪易文周吴军肖宏彬
Owner CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
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