CN108035208B - Cement concrete pavement expansion joint structure based on high-strength air bag and construction method thereof - Google Patents
Cement concrete pavement expansion joint structure based on high-strength air bag and construction method thereof Download PDFInfo
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- CN108035208B CN108035208B CN201711368546.2A CN201711368546A CN108035208B CN 108035208 B CN108035208 B CN 108035208B CN 201711368546 A CN201711368546 A CN 201711368546A CN 108035208 B CN108035208 B CN 108035208B
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- air bag
- expansion joint
- concrete
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- strength air
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/02—Arrangement or construction of joints; Methods of making joints; Packing for joints
- E01C11/04—Arrangement or construction of joints; Methods of making joints; Packing for joints for cement concrete paving
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C11/00—Details of pavings
- E01C11/02—Arrangement or construction of joints; Methods of making joints; Packing for joints
- E01C11/04—Arrangement or construction of joints; Methods of making joints; Packing for joints for cement concrete paving
- E01C11/14—Dowel assembly ; Design or construction of reinforcements in the area of joints
Abstract
The invention discloses a cement concrete pavement expansion joint structure based on a high-strength air bag, which comprises two concrete plates, wherein gaps are arranged between the concrete plates to form expansion joints, a plurality of dowel bars parallel to the length direction of the concrete plates are arranged between the concrete plates, the expansion joints between the concrete plates are filled with the high-strength air bag, and holes matched with the number and the height positions of the dowel bars and vertically arranged gaps for the dowel bars to penetrate through are reserved on the high-strength air bag. The invention also discloses a construction method of the cement concrete pavement expansion joint structure based on the high-strength air bag. According to the invention, the expansion joint between the concretes is always filled by the deformable high-strength air bag, sand and stone materials and rainwater cannot fall into the expansion joint, and diseases caused by expansion joint gap blockage, rainwater immersion and the like can be avoided. Therefore, the overall quality of the expansion joint section of the cement concrete pavement is obviously improved, and the later pavement maintenance cost is greatly reduced.
Description
Technical Field
The invention relates to a cement pavement expansion joint structure and a construction method thereof, in particular to a cement concrete pavement expansion joint structure capable of preventing water damage and a construction method thereof, and belongs to the technical field of cement concrete pavement construction.
Background
The cement concrete pavement has the advantages of high strength, good durability, high bearing capacity, convenience for driving at night and the like, and occupies a great proportion in various grades of roads and urban roads in China at present.
In order to make the cement concrete slab freely stretch when the temperature rises and eliminate the temperature stress generated by the temperature change, expansion joints are required to be arranged on the cement concrete pavement every certain length. The expansion joint adopts a true joint form, so that the expansion joint is a node of the cement concrete pavement, which is easy to cause diseases. The cause of the expansion joint disease is not only related to construction factors, but also to water damage to a great extent. Although the joint filling materials are filled in the expansion joints, along with the expansion and contraction of the concrete slab and the aging of the joint filling materials, rainwater easily enters the pavement structure layer through the expansion joints, so that a series of pavement diseases caused by insufficient water stability of the pavement structure are caused, and the driving comfort and even the safety of the road are seriously influenced.
Therefore, in order to ensure the driving safety and comfort of the expansion joint road section of the cement concrete pavement, the expansion joint needs to strictly prevent rainwater from entering the pavement structure through the expansion joint. The invention provides a cement concrete pavement expansion joint structure based on a high-strength air bag, wherein the adopted air bag can be completely attached to concrete walls on two sides of an expansion joint so as to block the possibility that rainwater enters a pavement structure layer through the expansion joint.
Disclosure of Invention
The invention aims to provide a cement concrete pavement expansion joint structure which is simple in construction process, high in reliability and capable of improving engineering quality.
The invention is realized by the following steps:
a cement concrete pavement expansion joint structure based on a high-strength air bag comprises two concrete plates, wherein a gap is formed between the concrete plates to form an expansion joint, and a plurality of dowel bars parallel to the length direction of the concrete plates are arranged between the concrete plates; high-strength air bags are filled in expansion joints among concrete plates, and holes matched with the number and the height positions of the dowel bars and vertically arranged gaps for the dowel bars to penetrate through are reserved on the high-strength air bags.
The further scheme is as follows:
the dowel bar is of a steel bar structure and comprises a steel bar structure main body and a sleeve, and the sleeve is arranged at one end of the dowel bar.
The further scheme is as follows:
dowel bars are arranged between the concrete slabs, and sleeves of adjacent dowel bars are sleeved at different ends of the dowel bars.
The further scheme is as follows:
the high-strength air bag is provided with an inflation hole, the high-strength air bag is placed between concrete plates in advance when the high-strength air bag is not inflated, the dowel bar penetrates through the high-strength air bag through a gap and is finally placed at a reserved hole of the air bag, and the expansion joint between the concrete plates is fully extruded after the air bag is inflated.
The further scheme is as follows:
the height of the high-strength air bag is slightly smaller than the thickness of the concrete slab, the width of the air bag is slightly larger than the width of an expansion joint between the concrete slabs, and an asphalt fiber board is arranged above the air bag and serves as a wearing layer.
The further scheme is as follows:
the width of the asphalt fiber board is the same as the width of the expansion joint between the concrete boards, and the length of the asphalt fiber board is the same as the width of the concrete boards.
The further scheme is as follows:
and the high-strength air bag is inflated after the concrete slab is constructed and forms strength. If in winter, the temperature is in a lower season, the gap between the concrete plates is the largest, the air bag is inflated to just fill the gap, and the road surface rainwater cannot enter the internal state of the road surface structure through the road surface expansion joint, when the temperature rises in other seasons, the air bag is extruded by the concrete plates due to the thermal expansion effect, the air pressure in the air bag is increased along with the contraction of the air bag, and at the moment, the air bag and the concrete plates reach a new balance state. As the temperature changes from high to low, the extrusion of the concrete plate to the air bag is weakened, and the air pressure of the air bag is reduced. In the period of the expansion and contraction of the concrete slab, the air bag is always tightly attached to the wall of the concrete slab, so that rainwater cannot enter the pavement structure. If the inflation is carried out in other seasons, the inflation pressure of the air bag needs to be determined through calculation.
The invention also aims to provide a construction method of the high-strength air bag-based cement concrete pavement expansion joint structure, which specifically comprises the following steps:
step one, arranging dowel bars parallel to the length direction of a concrete slab on two sides of an expansion joint, wherein the dowel bars are arranged at the height of the concrete slab 1/2; one end of the dowel bar is coated with asphalt and is provided with a sleeve pipe with the length of 10cm as a movable end, and the two sides of the sleeve pipe are staggered;
step two, pouring concrete after the dowel bars are arranged, reserving the expansion joint width, leveling the wall of the concrete slab, and waiting for the curing of the concrete slab to be finished;
step three, prefabricating a high-strength air bag capable of bearing high pressure;
step four, placing the uninflated high-strength airbag into the reserved expansion joint, and placing the dowel bar at the reserved hole of the airbag;
step five, inflating the air bag to the specified air pressure or the air pressure obtained through calculation;
and step six, filling the asphalt fiber board above the air bag to be used as a wearing layer.
The further scheme is as follows:
the distance between adjacent dowel bars is set to be 30 cm. The dowel bar is used for transferring the travelling load between the two concrete plates and preventing the adjacent concrete plates from staggering.
In the invention, the expansion joint between the concretes is always filled by the deformable high-strength air bag, and sand and stone materials and rainwater cannot enter the expansion joint, so that diseases caused by expansion joint gap blockage, rainwater immersion and the like can be avoided. Therefore, the overall quality of the expansion joint section of the cement concrete pavement is obviously improved, and the later pavement maintenance cost is greatly reduced. The construction method is simple and convenient to popularize and implement.
Drawings
In order to more clearly illustrate the technical scheme and the embodiment of the invention, the invention is carried out by the attached drawings. The drawings in the following description are only some embodiments of the invention, and other drawings can be obtained by those skilled in the art without inventive effort.
Fig. 1 is a perspective view of a cement concrete pavement expansion joint structure provided by the embodiment of the invention.
Fig. 2 is a structural diagram of a dowel and a sleeve thereof according to an embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The described embodiments are only some, not all embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any inventive changes, fall within the scope of the present invention.
Referring to the attached drawings 1 and 2, the high-strength air bag-based cement concrete pavement expansion joint structure comprises two concrete plates, namely a first concrete plate 1 and a second concrete plate 2, wherein the thickness of each concrete plate is 26cm, a 10cm gap is formed between the concrete plates to form an expansion joint, a plurality of force transmission rods 3 parallel to the length direction of the concrete plates are arranged between the concrete plates, a high-strength air bag 5 is filled in the expansion joint between the concrete plates, and holes 7 matched with the number and height positions of the force transmission rods and vertically arranged gaps 8 for the force transmission rods to penetrate through are reserved on the high-strength air bag.
Dowel bar 3 is long 50cm, and the diameter is 28 mm's plain round steel, including steel bar structure main part and sleeve pipe 4, the sleeve pipe setting is in the one end of dowel bar.
Dowel bars 3 are arranged between the concrete slabs, sleeves 4 of the adjacent dowel bars 3 are sleeved at different ends of the dowel bars, and the distance from the outermost dowel bar 3 to a longitudinal joint or the edge of a road surface is 20 cm.
The high-strength air bag 5 is provided with an inflation hole 6, the high-strength air bag is placed between concrete plates in advance when the high-strength air bag is not inflated, the dowel bar penetrates through the high-strength air bag through a gap and is finally placed at a reserved hole of the air bag, and the expansion joint between the concrete plates is fully extruded after the air bag is inflated.
The height of the high-strength air bag is slightly smaller than the thickness of the concrete plates, the width of the air bag is slightly larger than the width of expansion joints between the concrete plates, a layer of asphalt fiber plate 9 with the length consistent with the width of the concrete plates and the width of 10cm and the thickness of 2cm is arranged above the air bag and is used as a wearing layer
And the high-strength air bag is inflated after the concrete slab is constructed and forms strength. If in winter, the temperature is in a lower season, the gap between the concrete plates is the largest, the air bag is inflated to just fill the gap, and the road surface rainwater cannot enter the internal state of the road surface structure through the road surface expansion joint, when the temperature rises in other seasons, the air bag is extruded by the concrete plates due to the thermal expansion effect, the air pressure in the air bag is increased along with the contraction of the air bag, and at the moment, the air bag and the concrete plates reach a new balance state. As the temperature changes from high to low, the extrusion of the concrete plate to the air bag is weakened, and the air pressure of the air bag is reduced. In the period of the expansion and contraction of the concrete slab, the air bag is always tightly attached to the wall of the concrete slab, so that rainwater cannot enter the pavement structure. If the inflation is carried out in other seasons, the inflation pressure of the air bag needs to be determined through calculation so as to ensure that the full expansion joint is filled to the maximum extent within the pressure bearing range of the air bag.
The construction method of the expansion joint structure of the cement concrete pavement of the high-strength air bag specifically comprises the following steps:
step one, arranging dowel bars parallel to the length direction of a concrete slab on two sides of an expansion joint, arranging dowel bars 3 at the height of the concrete slab 1/2 at an interval of 30cm, and setting the distance from the outermost dowel bars to a longitudinal joint or the edge of a road surface to be 20 cm. One end of the dowel bar 3 is coated with asphalt and is provided with a sleeve 4 with the length of 10cm as a movable end, and the two sides of the sleeve are staggered;
and step two, pouring concrete after the dowel bars are arranged, and constructing the concrete slabs when the temperature reaches the lowest annual air temperature value in winter as an optimized embodiment of the invention. Reserving the expansion joint width, leveling the wall of the concrete slab, and waiting for the curing of the concrete slab to be finished;
and step three, prefabricating a high-strength air bag capable of bearing high pressure, wherein the length of the high-strength air bag is consistent with the width of the concrete slab, the height of the high-strength air bag is 24cm, the width of the high-strength air bag is 10.5cm, and the high-strength air bag is provided with an inflation hole 6. A hole 7 for inserting the dowel bar and a gap 8 for the dowel bar to pass through are reserved in the high-strength air bag;
after the concrete slab is cured, placing the uninflated high-strength air bag into the reserved expansion joint, and placing the dowel bar at the reserved hole of the air bag;
and fifthly, inflating the air bag through the inflation hole, stopping inflating when the air bag is tightly attached to the concrete wall, and enabling rainwater not to enter the pavement structure through the expansion joint structure. (ii) a
And step six, after the air bag is inflated, paving a layer of asphalt fiberboard 9 with the length consistent with the width of the concrete slab and the width of 10cm and the thickness of 2cm on the upper part of the air bag to serve as a wearing layer.
Although the present invention has been described herein with reference to the illustrated embodiments thereof, which are intended to be preferred embodiments of the present invention, it is to be understood that the invention is not limited thereto, and that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure.
Claims (7)
1. The utility model provides a cement concrete pavement expansion joint structure based on high strength gasbag, includes two concrete slab, its characterized in that:
a plurality of dowel bars parallel to the length direction of the concrete slabs are arranged between the concrete slabs; high-strength air bags are filled in expansion joints among the concrete slabs, and holes matched with the number and the height positions of the dowel bars and vertically arranged gaps for the dowel bars to penetrate through are reserved on the high-strength air bags;
the high-strength air bag is provided with an inflation hole, the high-strength air bag is placed between concrete plates in advance when the high-strength air bag is not inflated, the dowel bar penetrates through the high-strength air bag through a gap and is finally placed at a reserved hole of the air bag, and the expansion joint between the concrete plates is fully extruded after the air bag is inflated; the height of the high-strength air bag is slightly smaller than the thickness of the concrete slab, the width of the air bag is slightly larger than the width of an expansion joint between the concrete slabs, and an asphalt fiber board is arranged above the air bag and serves as a wearing layer.
2. The high-strength air bag-based cement concrete pavement expansion joint structure as claimed in claim 1, wherein:
the dowel bar is of a steel bar structure and comprises a steel bar structure main body and a sleeve, and the sleeve is arranged at one end of the dowel bar.
3. The high-strength air bag-based cement concrete pavement expansion joint structure as claimed in claim 2, wherein:
dowel bars are arranged between the concrete slabs, and sleeves of adjacent dowel bars are sleeved at different ends of the dowel bars.
4. The high-strength air bag-based cement concrete pavement expansion joint structure as claimed in claim 1, wherein:
the width of the asphalt fiber board is the same as the width of the expansion joint between the concrete boards, and the length of the asphalt fiber board is the same as the width of the concrete boards.
5. The high-strength air bag-based cement concrete pavement expansion joint structure as claimed in claim 1 or 4, wherein:
and the high-strength air bag is inflated after the concrete slab is constructed and forms strength.
6. A method for constructing a high-strength air bag based cement concrete pavement expansion joint structure as claimed in any one of claims 1 to 5, which comprises the following steps:
step one, arranging dowel bars parallel to the length direction of a concrete slab on two sides of an expansion joint, wherein the dowel bars are arranged at the height of the concrete slab 1/2; one end of the dowel bar is coated with asphalt and is provided with a sleeve pipe with the length of 10cm as a movable end, and the two sides of the sleeve pipe are staggered;
step two, pouring concrete after the dowel bars are arranged, reserving the expansion joint width, leveling the wall of the concrete slab, and waiting for the curing of the concrete slab to be finished;
step three, prefabricating a high-strength air bag capable of bearing high pressure;
step four, placing the uninflated high-strength airbag into the reserved expansion joint, and placing the dowel bar at the reserved hole of the airbag;
step five, inflating the air bag to the specified air pressure or the air pressure obtained through calculation;
and step six, filling the asphalt fiber board above the air bag to be used as a wearing layer.
7. The construction method of the high-strength air bag-based cement concrete pavement expansion joint structure as claimed in claim 6, wherein the construction method comprises the following steps:
the distance between adjacent dowel bars is set to be 30 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711368546.2A CN108035208B (en) | 2017-12-18 | 2017-12-18 | Cement concrete pavement expansion joint structure based on high-strength air bag and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711368546.2A CN108035208B (en) | 2017-12-18 | 2017-12-18 | Cement concrete pavement expansion joint structure based on high-strength air bag and construction method thereof |
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| CN108035208A CN108035208A (en) | 2018-05-15 |
| CN108035208B true CN108035208B (en) | 2020-06-19 |
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| CN201711368546.2A Active CN108035208B (en) | 2017-12-18 | 2017-12-18 | Cement concrete pavement expansion joint structure based on high-strength air bag and construction method thereof |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108978392A (en) * | 2018-06-27 | 2018-12-11 | 武汉华中科大土木工程检测中心 | A kind of big spacing seam arrangement of reinforcement cement concrete pavement structure and method of construction |
| CN109778633A (en) * | 2018-12-24 | 2019-05-21 | 中国电建集团山东电力建设第一工程有限公司 | A kind of detachable expansion joint plate of spigot-and-socket and construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FI116154B (en) * | 2001-02-05 | 2005-09-30 | Vaelisuomen Imubetoni Oy | Concrete tile expansion joint system |
| CN104060530B (en) * | 2014-06-25 | 2015-10-28 | 宁波交通工程建设集团有限公司 | Antiseep bridge expanssion joint and using method thereof |
| CN105839532B (en) * | 2016-05-30 | 2017-06-16 | 交通运输部公路科学研究所 | A kind of bridge expanssion joint |
| CN107237232B (en) * | 2017-07-21 | 2020-01-31 | 中冶南方城市建设工程技术有限公司 | high-durability cement concrete pavement expansion joint structure and construction method thereof |
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Inventor after: Hu Dongliang Inventor after: Wang Yang Inventor after: Cheng Xiaoliang Inventor after: Zuo Weijun Inventor after: Zhu Zhoubing Inventor before: Hu Dongliang Inventor before: Wang Yang Inventor before: Cheng Xiaoliang |
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