CN109826093B - Asphalt concrete seamless expansion device and construction method thereof - Google Patents
Asphalt concrete seamless expansion device and construction method thereof Download PDFInfo
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- CN109826093B CN109826093B CN201910125204.0A CN201910125204A CN109826093B CN 109826093 B CN109826093 B CN 109826093B CN 201910125204 A CN201910125204 A CN 201910125204A CN 109826093 B CN109826093 B CN 109826093B
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Abstract
The invention discloses an asphalt concrete seamless expansion device and a construction method thereof, the asphalt concrete seamless expansion device comprises an asphalt concrete pouring layer, a seam crossing plate, an isolation layer and a paving transition belt, wherein the seam crossing plate is paved above an expansion joint formed between two bridge end parts or between a bridge abutment back wall and the bridge end parts, the number of the seam crossing plates is multiple, the length of the seam crossing plates is larger than the width of the expansion joint, the paving transition belt is arranged on one side of the bridge deck paving layer extending to the expansion joint, the isolation layer is paved on the bottom surface of a post-pouring notch formed between the two paving transition belts, the isolation layer is arranged on the top surface of the seam crossing plate, the asphalt concrete pouring layer is arranged in a post-pouring notch above the isolation layer, and the surface of one side of the paving transition belts, which is contacted with the asphalt concrete. The invention has reasonable design and convenient construction, increases the driving comfort and reduces the maintenance of the expansion device under the condition of satisfying the expansion deformation of the bridge structure, and has good engineering application value.
Description
Technical Field
The invention relates to the technical field of bridge engineering expansion joint design and construction, in particular to an asphalt concrete seamless expansion device and a construction method thereof.
Background
With the rapid development of economy in China, the traffic volume of roads is increased rapidly, the running speed of vehicles on the roads and the load of the vehicles are increased continuously, and the requirement of people on the travelling comfort is higher and higher, so that the problems of the expansion joint device, which is insufficient in the previous bridge design and construction, are emphasized, and the problems of travelling safety accidents, corrosion of prestressed reinforcement anchor heads, damage of support water and the like caused by the problems of expansion joint damage, notch blockage, clamping, expansion joint fracture and the like become more and more prominent.
The expansion joint device of the highway bridge directly bears the repeated impact action of wheel load, is exposed in the atmosphere for a long time, has a severe use environment, and is the most easily damaged part of the bridge structure and difficult to repair. The bridge expansion joint device is slightly defective or insufficient in design and construction, which can cause early damage, so that a passer-by of a bridge feels uncomfortable and lacks a sense of safety, and sometimes the bridge structure is influenced, so that an asphalt concrete seamless expansion joint device and a construction method thereof are provided.
Disclosure of Invention
The invention aims to solve the problems in the prior art, provides an asphalt concrete seamless expansion device and a construction method thereof, has simple structure, reasonable design and convenient construction, increases the driving comfort and reduces the maintenance of the expansion device under the condition of satisfying the expansion deformation of a bridge structure, and has good engineering application value.
In order to achieve the purpose, the invention provides an asphalt concrete seamless expansion device, which comprises an asphalt concrete pouring layer, a seam crossing plate, an isolation layer and a paving transition belt, wherein the seam crossing plate is paved above an expansion joint notch formed between two bridge concrete beam plates, the width of the seam crossing plate is larger than that of the expansion joint notch, the paving transition belt is arranged on one side of the bridge deck paving layer extending towards the expansion joint notch, the isolation layer is paved on the bottom surface of the pouring notch formed between the two paving transition belts, the isolation layer is arranged on the top surface of the seam crossing plate, the asphalt concrete pouring layer is arranged in the pouring notch above the isolation layer, and the surface of one side of the paving transition belt, which is in contact with the asphalt concrete pouring layer, is in a wave shape; the isolation layer material is one of metal foil paper and structural fiber cloth; the pavement transition belt is one of cast-in-place reinforced concrete and steel reinforced concrete, and the top surface of the pavement transition belt is lower than the top surface of the bridge deck pavement layer by not less than 1 cm; the bridge deck pavement layer is made of asphalt concrete.
Preferably, the bridge pavement structure further comprises an asphalt layer, wherein the asphalt layer is a thin surface layer and is arranged on the top surfaces of the pavement transition belt and the asphalt concrete pouring layer, and the top surfaces of the pavement transition belt and the asphalt concrete pouring layer are 1-3 cm lower than the top surface of the bridge pavement layer.
Preferably, the top surfaces of the paving transition belt and the asphalt concrete pouring layer are flush with the top surface of the bridge deck paving layer.
Preferably, the width of the seam crossing plate is not less than 5cm larger than the width of the expansion joint.
A construction method of an asphalt concrete seamless telescopic device comprises the following steps:
step 1, pouring construction of paving a transition zone: when the bridge deck pavement layer is made of asphalt concrete, the pavement transition belt is required to be designed by independent reinforcement or profile steel reinforcement, an independent template is customized on the wavy surface on one side close to the asphalt concrete for forming, then the pavement transition belt is cast in situ by a vertical template, and the bridge deck asphalt concrete is poured after the strength of the pavement transition belt meets the requirement;
step 2, installing a seam crossing plate and an isolation layer: the seam crossing plate is cut into small pieces with the length of 7-15 cm from a long strip-shaped thin steel plate or other hard materials with a certain width, and then the small pieces are centrally paved on the top surfaces of the bridge concrete beam plates on the two sides of the seam to form a bearing member of an upper asphalt concrete pouring layer; then laying an isolation layer on the seam crossing plate, wherein the isolation layer needs to be fully laid at the bottom of the pouring notch and firmly adhered with the bottom of the pouring notch by using an adhesive;
step 3, pouring an asphalt concrete pouring layer: after the isolation layer is installed, the next cast-in-place construction of an asphalt concrete pouring layer can be carried out, asphalt raw materials with the well-prepared mixing ratio are heated and stirred uniformly and then poured into a pouring notch, a small-sized road roller is used for layering, compacting and compacting, the curing time is controlled, and finally an elastic asphalt concrete structure layer meeting the bearing capacity requirement and the telescopic deflection requirement is formed;
step 4, pouring a top asphalt layer: when the setting of the top surface of the pavement transition belt is lower than the top surface of the bridge deck pavement layer, the top surface asphalt layer is poured on the top surface of the pavement transition belt and the asphalt concrete pouring layer, the top surface of the pavement transition belt is flush with the top surface of the bridge deck pavement layer after being compressed tightly, and the top surface of the pavement transition belt is not required to be poured when the setting of the top surface of the pavement transition belt is flush with the top surface of the bridge deck pavement layer.
Preferably, the paving transition belt is one of cast-in-place reinforced concrete and steel reinforced concrete, the top surface of the paving transition belt is 1-3 cm lower than that of the bridge deck pavement layer, and the surface of one side close to the asphalt concrete pouring layer is in a wave shape so as to strengthen bonding with the asphalt concrete pouring layer.
Preferably, the asphalt concrete pouring layer material is one of elastic asphalt concrete and modified asphalt concrete.
Preferably, the seam crossing plate is made of a steel plate, and the width of the seam crossing plate is not less than 5cm larger than the width of the expansion joint.
Preferably, the isolation layer material is one of metal foil paper and structural fiber cloth and is used for isolating bonding between the asphalt concrete pouring layer and the lower bridge concrete beam plate.
Preferably, the asphalt layer material is one of elastic asphalt and modified asphalt.
The invention has the beneficial effects that: the invention can form a continuous whole with bridge deck pavement by combining the asphalt concrete pouring layer, the seam crossing plate, the isolation layer, the pavement transition belt and the like, overcomes the defects of uneven bridge deck, staggered platforms, skew torsion, irregular expansion joints and the like easily occurring at the expansion joints of the bridge, and has stable driving and good comfort; the telescopic device has the advantages that the telescopic device can adapt to various displacement quantities, is reasonable in design, increases the driving comfort degree and reduces the maintenance of the telescopic device under the condition of meeting the telescopic deformation of a bridge structure, and has good engineering application value.
The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a schematic cross-sectional view showing a seamless expansion device for asphalt concrete and a method for constructing the same according to a first embodiment of the present invention;
fig. 2 is a schematic cross-sectional structure view of a seamless expansion device according to a second embodiment of the present invention.
In the figure: 1-asphalt concrete pouring layer, 2-seam crossing plate, 3-isolation layer, 4-asphalt layer, 5-paving transition zone, 6-bridge deck paving layer and 7-bridge concrete beam plate.
Detailed Description
Example 1
Referring to fig. 1, the asphalt concrete seamless expansion device of the invention comprises an asphalt concrete pouring layer 1, a seam crossing plate 2, an isolation layer 3 and a paving transition belt 5, the seam crossing plate 2 is laid above an expansion joint notch formed between two bridge concrete beam plates 7, the width of the seam crossing plate 2 is not less than 5cm larger than the width of the expansion joint, the pavement transition belt 5 is arranged on one side of the bridge deck pavement layer 6 extending to the expansion joint slot, the isolation layer 3 is laid on the bottom surface of a pouring notch formed between the two paving transition belts 5, the isolation layer 3 is arranged on the top surface of the seam crossing plate 2, the asphalt concrete pouring layer 1 is arranged in a pouring notch above the isolation layer 3, and the surface of one side of the pavement transition belt 5, which is in contact with the asphalt concrete pouring layer 1, is wavy so as to strengthen the adhesion with the asphalt concrete pouring layer 1; the isolating layer 3 is made of one of metal foil paper and structural fiber cloth; the pavement transition belt 5 is one of cast-in-place reinforced concrete and steel reinforced concrete, and the top surface is lower than the top surface of the bridge deck pavement layer 6 by not less than 1 cm; the bridge deck pavement layer 6 is made of asphalt concrete.
Further, still include pitch layer 4, pitch layer 4 is the thin surface course, sets up in the transition of mating formation area 5 and bituminous concrete pouring layer 1 top surface, the top surface of transition of mating formation area 5, bituminous concrete pouring layer 1 is 1~3cm lower than the top surface on bridge deck pavement layer 6.
Example 2
Referring to fig. 2, the difference from embodiment 1 is: the asphalt layer 4 is not arranged, and the top surfaces of the pavement transition belt 5 and the asphalt concrete pouring layer 1 are flush with the top surface of the bridge pavement layer 6.
Referring to fig. 1, a construction method of an asphalt concrete seamless expansion device includes the following steps:
step 1, pouring construction of paving the transition zone 5: when the bridge deck pavement layer 6 is made of asphalt concrete, the pavement transition belt 5 needs to be designed by independent reinforcement or profile steel reinforcement, an independent template is customized on the wavy surface on one side close to the asphalt concrete for forming, then the pavement transition belt 5 is cast in situ by erecting a mold, and the bridge deck asphalt concrete is poured after the strength of the pavement transition belt 5 meets the requirement; the paving transition belt 5 is one of cast-in-place reinforced concrete and steel reinforced concrete;
step 2, installing a seam crossing plate 2 and an isolation layer 3: the seam crossing plate 2 is cut into small pieces 7-15 cm long from a strip-shaped thin steel plate or other hard materials with a certain width, then the small pieces are centrally paved on the top surfaces of the beam plates on two sides of a seam, the width of the seam crossing plate 2 is not less than 5cm larger than the width of the seam, and the seam crossing plate becomes a bearing member of the upper asphalt concrete pouring layer 1; then an isolation layer 3 is laid on the seam crossing plate 2, and the isolation layer 3 needs to be fully laid at the bottom of the pouring notch and is firmly adhered with the bottom by an adhesive; the seam crossing plate 2 is made of a steel plate. The isolation layer 3 is made of one of metal foil paper and structural fiber cloth and is used for isolating bonding between the asphalt concrete pouring layer 1 and the lower bridge concrete beam plate 7;
step 3, pouring the asphalt concrete pouring layer 1: after the isolation layer 3 is installed, the next cast-in-place construction of the asphalt concrete pouring layer 1 can be carried out, the asphalt raw materials with the well-prepared mixing ratio are heated and stirred uniformly and then poured into a pouring notch, a small-sized road roller is used for layering, compacting and compacting, the maintenance time is controlled, and finally an elastic asphalt concrete structure layer meeting the bearing capacity requirement and the telescopic deflection requirement is formed; the surface of one side, close to the asphalt concrete pouring layer 1, of the pavement transition belt 5 is wave-shaped so as to strengthen the adhesion with the asphalt concrete pouring layer 1; the material of the asphalt concrete pouring layer 1 is one of high-strength high-elasticity asphalt concrete, elastic asphalt concrete, rubber modified asphalt concrete and modified asphalt concrete;
step 4, pouring a top asphalt layer 4: when 5 top surfaces of transition zone of mating formation set up and lower than 6 top surfaces of bridge deck pavement layer, pour top surface pitch layer 4 at the top surface of 5, the bituminous concrete placement layer 1 of transition zone of mating formation, compress tightly its top surface after closely knit and 6 top surfaces looks parallel and level of bridge deck pavement layer, when 5 top surfaces of transition zone of mating formation set up and compare 6 top surfaces parallel and level of bridge deck pavement layer, need not pour top surface pitch layer 4. The asphalt layer 4 is made of one of high-strength high-elasticity asphalt, elastic asphalt, rubber modified asphalt and modified asphalt
The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.
Claims (8)
1. The utility model provides an asphalt concrete seamless telescoping device which characterized in that: comprises an asphalt concrete pouring layer (1), a seam crossing plate (2), an isolation layer (3) and a paving transition belt (5), the seam crossing plates (2) are laid above an expansion joint formed between two bridge end parts (7) or between a bridge abutment back wall and the bridge end parts, the number of the seam crossing plates (2) is a plurality of plates, the length of the bridge deck pavement transition belt is larger than the width of the expansion joint, the pavement transition belt (5) is arranged on one side of the bridge deck pavement layer (6) extending to the expansion joint, the isolation layer (3) is laid on the bottom surface of a post-pouring notch formed between the two paving transition belts (5), the isolation layer (3) is arranged on the top surface of the seam crossing plate (2), the asphalt concrete pouring layer (1) is arranged in a post-pouring notch above the isolation layer (3), the surface of one side of the paving transition belt (5) which is in contact with the asphalt concrete pouring layer (1) is in a wave shape; the asphalt layer (4) is a thin surface layer and is arranged on the top surfaces of the pavement transition belt (5) and the asphalt concrete pouring layer (1); the isolating layer (3) is made of one of metal foil paper and structural fiber cloth; the pavement transition belt (5) is one of cast-in-place reinforced concrete and steel reinforced concrete, and the top surface is lower than the top surface of the bridge deck pavement layer (6) by not less than 1 cm; the bridge deck pavement layer (6) is made of asphalt concrete.
2. The asphalt concrete seamless telescoping device of claim 1, wherein: the top surfaces of the paving transition belt (5) and the asphalt concrete pouring layer (1) are lower than the top surface of the bridge deck paving layer (6) by not less than 1 cm.
3. The asphalt concrete seamless telescoping device of claim 1, wherein: the seam crossing plate (2) is made of thin steel bars or other hard sheet materials, the number of the seam crossing plates is multiple, and the length of the seam crossing plate exceeds the width of the expansion joint and is not less than 4 cm.
4. A construction method of the asphalt concrete seamless expansion device according to claim 1, characterized in that: the method comprises the following steps:
step 1, pouring construction of paving a transition zone (5): when the bridge deck pavement layer (6) is made of asphalt concrete, the pavement transition belt (5) needs to be designed by independent reinforcement or profile steel reinforcement, an independent template is customized on the wavy surface on one side close to the asphalt concrete for forming, then the vertical template is used for cast-in-place pavement of the transition belt (5), and the bridge deck asphalt concrete can be poured after the strength of the pavement transition belt (5) meets the requirement;
step 2, installing a seam crossing plate (2) and an isolation layer (3): the seam crossing plate (2) needs to be cut into small pieces with the length of 7-15 cm from a strip-shaped thin steel strip or other hard sheet materials with a certain width, and then the small pieces are centrally paved on the top surfaces of the bridge end parts (7) on the two sides of the seam to form a bearing member of the upper asphalt concrete pouring layer (1); then an isolation layer (3) is laid on the seam crossing plate (2), and the isolation layer (3) needs to be fully laid at the bottom of the pouring notch and is firmly adhered with the pouring notch by using an adhesive;
step 3, pouring an asphalt concrete pouring layer (1): after the isolation layer (3) is installed, the next cast-in-place construction of the asphalt concrete pouring layer (1) can be carried out, firstly, the asphalt material is heated and melted, then, other mineral materials with corresponding proportions are added and uniformly stirred, the materials are poured into a post-pouring spout in a layering mode after being discharged, a small-sized road roller is used for compacting in a layering mode, the maintenance time is controlled, and finally, an elastic asphalt concrete structure layer meeting the bearing capacity requirement and the telescopic deflection requirement is formed;
and 4, pouring the top asphalt layer (4): when the top surface of the pavement transition belt (5) is lower than the top surface of the bridge deck pavement layer (6), pouring a top surface asphalt layer (4) on the top surfaces of the pavement transition belt (5) and the asphalt concrete pouring layer (1), and leveling the top surface of the pavement transition belt (5) and the top surface of the asphalt concrete pouring layer (1) after compaction; if the top surface of the existing pavement transition belt (5) is arranged to be flush with the top surface of the bridge deck pavement layer (6), the top surface asphalt layer (4) does not need to be poured;
the pavement transition belt (5) is one of cast-in-place reinforced concrete and steel reinforced concrete, the top surface is lower than the top surface of the bridge deck pavement layer (6) by not less than 1cm, and the surface of one side close to the asphalt concrete pouring layer (1) is in a wave shape so as to strengthen the bonding with the asphalt concrete pouring layer (1).
5. The construction method of the asphalt concrete seamless expansion device according to claim 4, characterized in that: the material of the asphalt concrete pouring layer (1) is one of elastic asphalt concrete and modified asphalt concrete.
6. The construction method of the asphalt concrete seamless expansion device according to claim 4, characterized in that: the material of the seam crossing plate (2) is thin steel strips or other hard sheet materials, and the length of the seam crossing plate exceeds the width of the expansion joint and is not less than 4 cm.
7. The construction method of the asphalt concrete seamless expansion device according to claim 4, characterized in that: the isolation layer (3) is made of one of metal foil paper and structural fiber cloth and is used for isolating bonding between the asphalt concrete pouring layer (1) and the end part (7) of the bridge below.
8. The construction method of the asphalt concrete seamless expansion device according to claim 4, characterized in that: the asphalt layer (4) is made of one of elastic asphalt and modified asphalt.
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| CN111074762B (en) * | 2019-12-11 | 2021-08-31 | 南通大学 | Seamless expansion joint of compound concrete bridge face of carbon cloth |
| CN110965422B (en) * | 2019-12-13 | 2021-11-05 | 江苏中路工程技术研究院有限公司 | Flexible splicing paving structure and construction method thereof |
| CN110983967B (en) * | 2019-12-27 | 2021-09-28 | 同济大学建筑设计研究院(集团)有限公司 | Bridge deck continuous process |
| CN113152270B (en) * | 2021-04-22 | 2022-06-17 | 济南金诺公路工程监理有限公司 | Seamless bridge deck expansion joint device and construction method thereof |
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