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Stress absorption band construction method

A technology of stress absorbing belt and construction method, which is applied to roads, pavement details, roads, etc., can solve the problems of difficult operation of construction machinery, reduced road bearing capacity, shortened road service life, etc., so as to reduce road maintenance costs and maximize tensile strain. The effect of reducing and alleviating stress concentration

Active Publication Date: 2011-08-24
XINGTAI ROAD & BRIDGE CONSTR GENERAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of traffic construction, a large number of old roads have been rebuilt and expanded. The combination of new and old roads and the pavement of the road surface often have many diseases. The reasons for the formation of cracks include: (1) The settlement of the old road has been completed or basically completed, and there must be different settlements between the old and new roads, thus forming cracks; (2) Due to the pollution of the road surface during construction and the difficulty in operating construction machinery, The seam becomes the weak position of quality, which is prone to cracking; (3) The cracking of the seam is caused by driving action and vibration
If it is not treated in time, rainwater and other pollutants may seep into the roadbed along the gaps, causing early damage to the road surface, resulting in a reduction in the bearing capacity of the road surface, causing cracks to increase and serious damage to the road surface structure, thereby greatly affecting the traffic capacity of the road and shortening the service life of the road surface

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Cut the old pavement structure layer 1 longitudinally along the edge of the pavement (the strength that can meet the specification requirements) or pave it into a slope 11 with an angle α of 15°-45° to the vertical plane of the longitudinal cut, until the depth of the new pavement 2 Elevation 4 of the subgrade top; Similarly, the newly paved pavement structure layer and the stubble position of the old road 1 are also paved or sliced ​​into an inclined plane 21 with an angle of 15°-45° with the vertical plane, so that the new and old pavement 11,12 An inverted trapezoidal or inverted triangular groove 3 is formed at the joint;

[0020] (2) Clean up the inverted trapezoidal or inverted triangular grooves 3 (bottom width over 3cm) formed by the above-mentioned new and old roads, spray the penetrating oil, and then fill the grooves with asphalt gravel, requiring layered filling , the thickness of each layer is controlled within 10cm, the uppermost layer is rolled by a r...

Embodiment 2

[0023] Step (1) and step (2) are with embodiment 1;

[0024] Step (3): Pave the geosynthetic material 6 on the part where the stress-absorbing belt 3 after the rolling in steps (1) and (2) is connected with the new and old road surfaces, and the geosynthetic material 6 is outside the upper opening of the groove 3 of the stress-absorbing belt The extended paving is not less than 50cm, that is, the width of the geosynthetics should be an inverted trapezoidal or inverted triangular stress-absorbing belt, and the width of the upper opening of the stress-absorbing belt should not be less than 50cm on both sides, and then pave the same asphalt concrete 5 as the new pavement surface, and use a road roller Compact until the compactness required by the design is reached.

Embodiment 3

[0026] Such as figure 1 As shown, this example is the construction method required by the construction design documents when paving a new layer of road surface on the old road surface;

[0027] Step (1) and step (2) are with embodiment 1;

[0028] Step (3):

[0029] a) Slicing a layer 12 of the original old road surface stubble part, the slicing thickness should be consistent with the thickness of the surface layer 51 in the newly widened road surface, and the slicing width should not be less than 100cm;

[0030] b) Laying geosynthetics 6 at the stubble position between the stress absorbing zone 3 and the new and old road surface after step (1) and (2) rolling, the geosynthetics 6 can be made of glass fiber mesh, and the geosynthetics 6 is under stress The outer side of the upper opening of the absorption belt groove 3 is not less than 50cm, that is, the width of the geosynthetic material should be an inverted trapezoidal or inverted triangular absorption belt, and the width...

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Abstract

The invention discloses a construction method of a stress absorption band. The stress absorption band is arranged at the joint part of a new road and an old road, namely from the top surface of a roadbed to the underside of a newly paved oil surface, the stress absorption band is arranged into an inverse trapezoid or an inverse triangular groove, and the groove is filled with asphalt macadam. The stress absorption band is arranged at the joint part of the new road and the old road, can absorb and reduce stress, and prevent road surface diseases caused by the stress at the joint part of the new road and the old road.

Description

technical field [0001] The invention relates to a construction method for the junction of old and new roads in reconstruction and expansion of old roads, in particular to a construction method for a stress absorption zone. Background technique [0002] With the continuous development of traffic construction, a large number of old roads have been rebuilt and expanded. The combination of new and old roads and the pavement of the road surface often have many diseases. The reasons for the formation of cracks include: (1) The settlement of the old road has been completed or basically completed, and there must be different settlements between the old and new roads, thus forming cracks; (2) Due to the pollution of the road surface during construction and the difficulty in operating construction machinery, The seam becomes the weak position of quality, which is prone to cracking; (3) The driving action and vibration cause cracking at the seam. If it is not treated in time, rainwate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C11/02
Inventor 李来宾
Owner XINGTAI ROAD & BRIDGE CONSTR GENERAL
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