CN101591882B - Stress absorption band construction method - Google Patents

Stress absorption band construction method Download PDF

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Publication number
CN101591882B
CN101591882B CN2009100745437A CN200910074543A CN101591882B CN 101591882 B CN101591882 B CN 101591882B CN 2009100745437 A CN2009100745437 A CN 2009100745437A CN 200910074543 A CN200910074543 A CN 200910074543A CN 101591882 B CN101591882 B CN 101591882B
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absorption band
old
stress absorption
layer
road
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CN2009100745437A
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CN101591882A (en
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李来宾
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Xingtai road and Bridge Construction Group Co.,Ltd.
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XINGTAI ROAD AND BRIDGE CONSTRUCTION GENERAL CO
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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

A kind of job practices of stress absorption band
Technical field
The present invention relates to the job practices of connection place, new and old road in a kind of old road reorganization and expansion, related in particular to a kind of job practices of stress absorption band.
Background technology
Continuous development along with transport development, reorganization and expansion is carried out on a large amount of old roads, a lot of diseases often appear in mating formation of the combination on new and old road, road surface, wherein modal disease is, newly, the seam crossing on old road produces longitudinal joint and be full of cracks, it forms reason and comprises: sedimentation has been finished or has been finished substantially on (1) old road, certainly leads to different settling amounts between the new and old road, thereby forms the crack; (2) owing to reasons such as pollute on road surface in the construction, construction machinery is not easy to operate, seam crossing becomes the quality weak location, is easy to generate cracking; (3) driving effect, vibration cause the cracking of seam crossing.As untimely regulation, rainwater and other pollutants may infiltrate roadbed along the slit, cause the road surface to be damaged in early days, cause the road surface bearing capacity to reduce, cause that crackle strengthens and the road structure heavy damage, thereby greatly influence the traffic capacity of road and shorten service life of road surface.This just needs to explore a kind of new, old road junction and connects job practices, to solve the pavement disease after the reorganization and expansion of old road.
Summary of the invention
Technical problem to be solved by this invention provides a kind of job practices of stress absorption band, and this stress absorption band is arranged on newly, the Jiu Lu junction, can absorb and subdue stress, prevents new, old pavement junction stress effect and the pavement disease that produces.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of job practices of stress absorption band, described stress absorption band is arranged in the basic unit of new highway and old highway seam areas, described stress absorption band is set to down the groove of trapezoidal or del, fill asphalt macadam in the described groove and be equipped with bituminous concrete at the asphalt macadam end face, the job practices of this stress absorption band may further comprise the steps:
(1) the green road surface deck that connects batch position with the old pavement deck and with old pavement along pavement edge longitudinal slicing or making become the inclined-plane that becomes 15 ° of-45 ° of angle α with the rip cutting vertical plane,, the degree of depth is until the roadbed end face absolute altitude of newly paving the way, and makes new, old pavement connection place form one and fall trapezoidal or the del groove;
(2) above-mentioned new, the old highway of cleaning out form fall trapezoidal or the del groove in the placement in layers asphalt macadam, every layer thickness is controlled in the 10cm, every layer must be vibrated compacting;
Making bituminous concrete on the asphalt macadam end face that fills in the stress absorption with groove is used the road roller compacting, until the degree of compaction that reaches designing requirement.
Preferred job practices 1:a) earlier former old pavement is connect a batch position slicing one deck, slicing thickness is consistent with the middle surface thickness of newly widening the road surface, and the slicing width is not less than 50cm;
B) stress absorption band after the pressure compacting of shaking is finished is laid a geosynthetics with batch position that connects new, old pavement, the geosynthetics overall width is not less than 50cm+ and falls trapezoidal or del stress absorption band width+50cm suitable for reading, be the geosynthetics width should be down trapezoidal or del absorption band width suitable for reading each extends and to be not less than 50cm, the pitch making of surface layer in carrying out then to both sides again;
C) repave by the requirement of b step and put one deck geosynthetics, carry out the pitch making of upper layer then.
Preferred job practices 2:a) earlier that former old pavement is two-layer along the joint part slicing, and form and be not less than the wide step of 50cm, slicing thickness is consistent with the upper layer and the middle surface thickness of new black top rigid pavement;
B) stress absorption band after the pressure compacting of shaking is finished connects batch position with new, old pavement and lays a geosynthetics, the geosynthetics overall width is not less than 50cm+ and falls trapezoidal or del stress absorption band width+50cm suitable for reading, be the geosynthetics width should be down trapezoidal or del absorption band width suitable for reading each extends and to be not less than 50cm to both sides again, carry out surface layer making in the pitch then, thickness is identical with lower floor's shoulder height of old pavement joint part slicing;
C) repave by the requirement of b step and put one deck geosynthetics, carry out pitch upper layer making then, thickness is identical with the upper strata shoulder height of old pavement joint part slicing.
Adopt the beneficial effect that technique scheme produced to be: to be in seam areas, be below the pasta of roadbed top to new shop stress absorption band to be set, it is as a longitudinal modulus of elasticity intermediate zone, adopt asphalt macadam to handle new, the vertical joint portion of old structure layer, asphalt macadam deck resistance to compression is stronger, absorb to dissipate self and load-bearing distortional stress of two kinds of road structures prevent that new, old structure layer from producing failure stress because of stress deformation is different, thereby preventing the road surface longitudinal cracking.Because asphalt macadam has flexibility, can whole combine coordination stressed with the less old line structure layer of modulus of elasticity; Utilize inclined-plane and asphalt macadam trapezoidal or the del groove to have the stronger effect of resistance to compression simultaneously, road surface structare layers such as cement stabilizing that can be different with modulus of elasticity broken (gravel) stone, two-ash broken stones, graded broken stone, bituminous concrete, cement stabilizing bed course squeeze the inclined-plane in conjunction with forming embedding, absorb each side's stress.In addition, between stress absorption band and new surface layer, be provided with geosynthetics, can make the stress of horizontal direction extend to wider by geosynthetics, thereby the stress of alleviating seam crossing is concentrated, play the effect of absorption portion tensile energy, effectively improve the road structure stress distribution, simultaneously, also reduced the adhesion between surface layer and the basic unit, thereby the maximum stretching strain of surface layer is reduced.The draw bail of new, the old road of the present invention junction can solve the pavement disease after the reorganization and expansion of old road, effectively improves the road surface functional performance, prolongs service life of road surface, reduces later stage highway maintenance cost.
Description of drawings
Fig. 1 is the structural representation of stress absorption band of the present invention;
Fig. 2 is the another kind of structural representation of stress absorption band of the present invention;
The specific embodiment
As Fig. 1-shown in, the present invention is in new, old road seam areas, promptly roadbed top to new shop pasta is provided with stress absorption band once, stress absorption band is made as down trapezoidal or the del groove, has filled asphalt macadam in the groove.
Embodiment 1:
(1) with old pavement deck 1 along pavement edge (can satisfy the intensity of code requirement) vertically slicing or making become the inclined-plane 11 that becomes 15 ° of-45 ° of angle α with the rip cutting vertical plane, the degree of depth is high by 4 until 2 the roadbed top mark of newly paving the way; Equally, green road surface deck and old road 1 connect batch position also making or slicing become the inclined-plane 21 that becomes 15 ° of-45 ° of angles with vertical plane, make new, old pavement 11,12 connection places form one and fall trapezoidal or del groove 3;
(2) above-mentioned new, old road is formed fall trapezoidal or del groove 3 (more than the bottom width 3cm) is cleaned out, spray priming oil, in groove 3, fill asphalt macadam then, require placement in layers, every layer thickness is controlled in the 10cm, topmost one deck adopts road roller to roll, and all the other each layers all vibrate compacting, and the degree of compaction that reaches designing requirement promptly forms stress absorption band of the present invention;
(3) making and the new identical bituminous concrete 5 of top course on the groove 3 are used the road roller compacting, get final product until the degree of compaction that reaches designing requirement.
Embodiment 2:
Step (1) and step (2) are with embodiment 1;
Step (3): the stress absorption band 3 after step (1), (2) are rolled and finished connects batch position with new, old pavement and lays geosynthetics 6, geosynthetics 6 is not less than 50cm at stress absorption with groove 3 outside Yan Pu suitable for reading, be the geosynthetics width should be down trapezoidal or del stress absorption band width suitable for reading each extends and to be not less than 50cm to both sides again, making and the newly identical bituminous concrete 5 of top course then, and use the road roller compacting, get final product until the degree of compaction that reaches designing requirement.
Embodiment 3:
Job practices when as shown in Figure 1, this fact Example is the new road surface of making one deck on old pavement of working design documentation requirements;
Step (1) and step (2) are with embodiment 1;
Step (3):
A) former old pavement is connect a batch position slicing one deck 12, slicing thickness Ying Yuxin widens surface layer 51 consistency of thickness in the road surface, and the slicing width is not less than 100cm;
B) stress absorption band after step (1), (2) are rolled and finished 3 is laid geosynthetics 6 with batch position that connects new, old pavement, geosynthetics 6 can adopt glass fiber net, geosynthetics 6 is not less than 50cm at stress absorption with groove 3 outside Yan Pu suitable for reading, be the geosynthetics width should be down trapezoidal or del absorption band width suitable for reading each extends and to be not less than 50cm, the asphalt surface course making of surface layer 51 in carrying out then to both sides again;
C) by the requirement of b step, re-lay one deck geosynthetics 6, and then the bituminous concrete making that carries out upper layer 52 gets final product at joint part new, old pavement.
Embodiment 4:
As shown in Figure 2, this fact Example is the old pavement of the working design documentation requirements job practices when not overlaying new road surface;
Step (1) and step (2) are with embodiment 1;
Step (3):
A) earlier that former old pavement is two-layer 12,13 along the joint part slicing, and form and be not less than the wide step of 50cm, slicing thickness respectively with new black top rigid pavement in, upper layer 51,52 consistency of thickness;
B) shake in step (1), (2) and press the stress absorption band 3 after compacting is finished to lay a geosynthetics 6 with batch position that connects new, old pavement, the overall width of geosynthetics 6 is not less than down trapezoidal or adds both sides to triangular groove width suitable for reading and prolongs the later width of 50cm, carry out the laying of surface layer 51 in the pitch then thereon again, thickness is identical with lower floor's shoulder height of joint part slicing;
C) repave at joint part new, old pavement by the requirement of b step and put one deck geosynthetics 6, carry out pitch upper layer 52 makings then thereon again, thickness is identical with the upper strata shoulder height of old pavement joint part slicing.

Claims (4)

1. the job practices of a stress absorption band, described stress absorption band is arranged in the basic unit of new highway (2) and old highway (1) seam areas, described stress absorption band is set to down the groove of trapezoidal or del, fill asphalt macadam in the described groove and be equipped with bituminous concrete at the asphalt macadam end face, the job practices of this stress absorption band may further comprise the steps:
1) old pavement deck (1) is reached the green road surface deck (2) that connects batch position with old road, become inclined-plane (11), (21) that become 15 ° of-45 ° of angle α with the rip cutting vertical plane along pavement edge longitudinal slicing or making, the degree of depth is until going to a grassroots level or roadbed end face absolute altitude (4) of newly paving the way, and makes new, old pavement junction form one and fall trapezoidal or del groove (3);
2) above-mentioned new, the old road of cleaning out form fall trapezoidal or del groove (3) in fill asphalt macadam, fill and require layering to handle, every layer thickness is controlled in the 10cm, every layer all need be vibrated compacting.
2. the job practices of a kind of stress absorption band according to claim 1 is characterized in that: go up making bituminous concrete (5) at stress absorption with groove (3), use the road roller compacting, until the degree of compaction that reaches designing requirement.
3. the job practices of a kind of stress absorption band according to claim 1 is characterized in that:
A) earlier former old pavement is connect a batch position slicing one deck (12), slicing thickness and middle surface layer (51) consistency of thickness of newly widening the road surface, the slicing width is not less than 50cm;
B) stress absorption band (3) after the pressure compacting of shaking is finished is laid a geosynthetics (6) with batch position that connects new, old pavement, geosynthetics (6) overall width is not less than 50cm+ and falls trapezoidal or del absorption band width+50cm suitable for reading, be the geosynthetics width should be down trapezoidal or del absorption band width suitable for reading each extends and to be not less than 50cm to both sides again, carry out the asphalt surface course making of middle surface layer (51) then thereon again;
C) repave by the requirement of b step and put one deck geosynthetics (6), carry out the asphalt surface course making of upper layer (52) then thereon again.
4. the job practices of a kind of stress absorption band according to claim 1 is characterized in that:
A) earlier with former old pavement along joint part slicing two-layer (12), (13), and form and be not less than the wide step of 50cm, the going up of slicing thickness and new black top rigid pavement, middle surface layer (52), (51) consistency of thickness;
B) stress absorption band (3) after the pressure compacting of shaking is finished is laid a geosynthetics (6) with batch position that connects new, old pavement, geosynthetics (6) overall width is not less than 50cm+ and falls trapezoidal or del absorption band width+50cm suitable for reading, be the geosynthetics width should be down trapezoidal or del absorption band width suitable for reading each extends and to be not less than 50cm to both sides again, carry out surface layer in the pitch (51) making then thereon again, thickness is identical with lower floor's shoulder height of old pavement joint part slicing;
C) repave by the requirement of b step and put one deck geosynthetics (6), carry out pitch upper layer (52) making then thereon again, thickness is identical with the upper strata shoulder height of old pavement joint part slicing.
CN2009100745437A 2009-06-29 2009-06-29 Stress absorption band construction method Active CN101591882B (en)

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CN101591882B true CN101591882B (en) 2011-08-24

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Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102061658B (en) * 2010-12-03 2012-05-30 上海市城市建设设计研究院 Pavement repairing method for preventing pavement structure joints from generating reflection cracks
CN102505606B (en) * 2011-10-31 2014-09-17 湖南云中沥青有限责任公司 Processing method for cracks when asphalt layer is additionally paved on cement road surface
CN103343504B (en) * 2013-06-24 2015-07-15 中国十七冶集团有限公司 Ultra-thin asphalt sand seaming method
CN103758009B (en) * 2013-12-31 2016-08-17 山东省交通科学研究院 A kind of asphalt pavement crack fast repairing method
CN104562889A (en) * 2014-12-31 2015-04-29 王新华 Cement concrete pavement with novel expansion joints and pre-broken joints
CN105888082B (en) * 2016-04-29 2018-08-14 陆庆祥 A kind of new and old building concrete joins seamless method
CN108589453B (en) * 2018-04-04 2020-07-07 中交第三公路工程局有限公司 New and old roadbed splicing process and equipment
CN110258238A (en) * 2019-05-09 2019-09-20 昆山市交通航务工程有限公司 A kind of laying method of new-old concrete bond intersection
CN111305088B (en) * 2020-03-16 2020-09-29 高增辉 Method for reinforcing expansion joint of highway bridge

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Address after: 054001, 79 Qiao Road, Qiaodong District, Hebei, Xingtai

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Patentee before: XINGTAI ROAD & BRIDGE CONSTRUCTION GENERAL Co.,Ltd.