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High-bearing-capacity pavement structure and paving construction method

A technology of pavement structure and construction method, which is applied in the direction of roads, roads, road construction reinforcements, etc., can solve problems affecting the integrity of pavement structure, detachment of asphalt concrete layer, interface slippage, etc., so as to reduce the risk of interlayer slippage, The effect of strengthening the strength of the base and saving the construction period

Pending Publication Date: 2022-06-03
CHINA RAILWAY BEIJING ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the cement concrete pavement paved with asphalt concrete layer has different material properties such as elastic modulus and Poisson's ratio. Tensile stress is easily generated between concrete layers, causing the interface to slip relative to each other, resulting in the detachment of the asphalt concrete layer from the cement concrete layer, affecting the integrity of the pavement structure

Method used

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  • High-bearing-capacity pavement structure and paving construction method
  • High-bearing-capacity pavement structure and paving construction method
  • High-bearing-capacity pavement structure and paving construction method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

like Figure 1-6 , a high bearing capacity pavement structure, comprising a graded gravel layer 4, a mortar layer 9 is laid above the graded gravel layer 4, an adhesive layer 10 is laid above the mortar layer 9, and the adhesive layer 10 is laid above There is an asphalt concrete overlay 12;

The bonding layer 10 is provided with a reinforcing bar cage 11 , the upper and lower sides of the reinforcing bar cage 11 are provided with a plurality of outwardly extending outer bars 114 at equal intervals, and the outer bars 114 on the upper and lower sides respectively extend to the lower layer of the bonding layer 10 . The mortar layer 9 and the asphalt concrete overlay layer 12 on the upper layer of the adhesive layer 10.

[0024] In a preferred solution, the cement mortar 6 is spread in the graded gravel layer 4 to form a gravel grouting layer.

[0025] In a preferred solution, the adhesive layer 10 is selected from modified emulsified asphalt.

[0026] In this example, the mod...

Embodiment 2

like Figure 7 , on the basis of Embodiment 1, the reinforcing bar cage 11 includes a plurality of main bars 111, and the plurality of main bars 111 are connected and bound by stirrups 112 to form a main structure of the reinforcing bar cage 11 with a rectangular cross-section. An auxiliary rib 113 is disposed between two adjacent main ribs 111 on the plane, and the outer rib 114 is obliquely welded and fixed on the auxiliary rib 113 .

[0029] The reinforcement cage 11 can be further added with spiral reinforcement to increase the strength of the reinforcement cage 11 and achieve the purpose of increasing the bearing capacity of the pavement.

Embodiment 3

Based on the above embodiments, the paving construction method of the high bearing capacity pavement structure comprises the following steps:

1) Leveling the site and erecting formwork;

2) Use the gravel paver 1 to spread the large-sized gravel layer 2;

3) Use the gravel paver 1 to spread the small-sized gravel layer 3 on the large-sized gravel layer 2;

4) Rolling the small-diameter gravel layer 3 with the road roller 5 and mixing the small-diameter gravel layer 3 into the gap of the large-diameter gravel layer 2 to form a graded gravel layer 4;

5) Use the cement paver 7 to spread the cement mortar 6 above the graded gravel layer 4, so that the cement mortar 6 penetrates into the gap of the graded gravel layer 4 to form a gravel grouting layer;

6) Install the reinforcement cage 11 above the graded gravel layer 4, and use the outer reinforcement 114 below the reinforcement cage 11 to form support;

7) Lay the mortar layer 9 above the graded gravel layer 4;

8) Lay the ...

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Abstract

The high-bearing-capacity pavement structure comprises a graded broken stone layer, a mortar layer is laid on the graded broken stone layer, a bonding layer is laid on the mortar layer, and an asphalt concrete overlay layer is laid on the bonding layer; a reinforcement cage is arranged in the bonding layer, outer ribs are arranged on the upper side and the lower side of the reinforcement cage, and the outer ribs extend into the mortar layer and the asphalt concrete overlay layer. The paving construction method of the high-bearing-capacity pavement structure comprises the following steps: 1) leveling a site and erecting a template; (2) paving a large-particle-size gravel layer; (3) paving a small-particle-size gravel layer; (4) rolling to form a graded broken stone layer; the construction method comprises the following steps of (1) paving cement mortar to form a gravel grouting layer, (2) mounting a reinforcement cage, (3) paving a bonding layer, (4) paving a bonding layer, and (5) paving cement mortar to form a gravel grouting layer, (6) mounting a reinforcement cage, (7) paving a mortar layer, (8) paving a bonding layer, and (9) paving an asphalt concrete overlay layer.By adopting the structure and the method, the pavement structure is optimized, the stability between layers of pavements is enhanced, the slippage risk of the pavement is reduced, and reliable environmental conditions are provided for normal operation of roads.

Description

technical field [0001] The invention relates to the technical field of road construction, in particular to a high bearing capacity pavement structure and a paving construction method. Background technique [0002] Under the repeated action of heavy traffic load factors and environmental factors, the pavement structure will gradually be damaged, and various diseases will appear, such as cracks, plate corner fractures, loose pavement, muddy, etc., which seriously affect the normal driving safety of the pavement. Therefore, it needs to be renovated. or expansion. [0003] At present, it takes a long time to use cement concrete for renovation or expansion, which makes the road inconvenient. Asphalt pavement has received more and more attention due to its good deformation yield, comfort and smoothness, high friction and low noise. In view of the problems of cement concrete pavement, it has become a research hotspot to add asphalt pavement on the basis of existing cement concret...

Claims

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Application Information

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IPC IPC(8): E01C7/32E01C11/16
CPCE01C7/32E01C7/325E01C11/16Y02A30/60
Inventor 金敏霍二鹏张文秀
Owner CHINA RAILWAY BEIJING ENG GRP CO LTD
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