Construction method for enhancing structural strength of joint cement concrete pavement

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

Inactive Publication Date: 2014-01-22
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 t

Method used

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  • Construction method for enhancing structural strength of joint cement concrete pavement
  • Construction method for enhancing structural strength of joint cement concrete pavement
  • Construction method for enhancing structural strength of joint cement concrete pavement

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0040] Example 1:

[0041] See figure 1 , figure 2 , image 3 , Figure 4 with Figure 5 , The construction method to enhance the structural strength of the joint cement concrete pavement, the construction steps are as follows:

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

[0043] The joint load transfer capacity and deflection value are detected and determined by the falling weight deflection instrument. The joint load transfer coefficient is less than 40% and the deflection value is greater than 0.89mm when the design load is 100kN. The unstable pavement needs to be repaired. ; 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 seam of the unloaded plate, (0.01mm); w l It is the deflection value at the edge of t...

Example Embodiment

[0056] Example 2:

[0057] See figure 1 , figure 2 , image 3 , Figure 4 with Figure 5 , The construction method to enhance the structural strength of the joint cement concrete pavement, the construction steps are as follows:

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

[0059] The joint load transfer capacity and deflection value are detected and determined by the falling weight deflection instrument. The joint load transfer coefficient is less than 40% and the deflection value is greater than 0.89mm when the design load is 100kN. The unstable pavement needs to be repaired. ; 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 seam of the unloaded plate, (0.01mm); w l It is the deflection value at the edge of t...

Example Embodiment

[0072] Example 3:

[0073] See figure 1 , figure 2 , image 3 , Figure 4 with Figure 5 , The construction method to enhance the structural strength of the joint cement concrete pavement, the construction steps are as follows:

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

[0075] The joint load transfer capacity and deflection value are detected and determined by the falling weight deflection instrument. The joint load transfer coefficient is less than 40% and the deflection value is greater than 0.89mm when the design load is 100kN. The unstable pavement needs to be repaired. ; 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 seam of the unloaded plate, (0.01mm); w l It is the deflection value at the edge of t...

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Abstract

The invention discloses a construction method for enhancing the structural strength of a joint cement concrete pavement. The method comprises the steps that an unstable pavement plate which is poor in joint load transmission capacity and large in deflection value is repaired, the mode that a paving layer is directly added on combined type continuous reinforcement concrete is used, a pulling rod is arranged on the horizontal joint corresponding to an existing pavement, and a specially-designed pulling rod is arranged on the longitudinal joint. Pulling rod connecting openings which are specially designed are arranged at the two ends of the paving layer in advance, bituminous concrete is used as a transition section, and convenience is provided for paving layer construction at the nest stage. The pavement repairing technology can be used on a heavy traffic and joint cement concrete pavement distress section, heavy traffic load resisting capacity is achieved, the service life of the pavement is prolonged, and early distress is prevented. Meanwhile, good durability and economy are achieved.

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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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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