CN109653090B - Bridge asphalt pavement seamless overall paving structure and paving process thereof - Google Patents
Bridge asphalt pavement seamless overall paving structure and paving process thereof Download PDFInfo
- Publication number
- CN109653090B CN109653090B CN201910108334.3A CN201910108334A CN109653090B CN 109653090 B CN109653090 B CN 109653090B CN 201910108334 A CN201910108334 A CN 201910108334A CN 109653090 B CN109653090 B CN 109653090B
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- cover plate
- bridge
- asphalt pavement
- key
- key pin
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- 239000010426 asphalt Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000008569 process Effects 0.000 title claims abstract description 10
- 239000002184 metal Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 5
- 239000004568 cement Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 239000007769 metal material Substances 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000010276 construction Methods 0.000 description 4
- 238000012423 maintenance Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000008602 contraction Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 244000126211 Hericium coralloides Species 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000008093 supporting effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/60—Planning or developing urban green infrastructure
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention provides a seamless integral paving structure of a bridge asphalt pavement and a paving process thereof, and relates to the technical field of bridge building engineering. The expansion joints of the two adjacent beam bodies are completely covered by paving the cover plates on the expansion ends of the two adjacent beam bodies. The beam body expansion joint is arranged below the cover plate, and the beam body can longitudinally and freely expand and contract; the upper surface of the cover plate is provided with the whole asphalt pavement without expansion joints, so that the seamless whole pavement of the asphalt pavement of the bridge is realized, the integrity and stability of the bridge are enhanced, and the safety and the comfort of driving are improved. All problems of the bridge expansion joint are solved, and all hazards of the bridge expansion joint are eliminated.
Description
Technical Field
The invention relates to the technical field of bridge building engineering, in particular to a seamless integral paving structure of a bridge asphalt pavement and a paving process thereof.
Background
The expansion joint of the highway bridge is an essential important component in bridge building facilities and is used for meeting the requirements of expansion and contraction of the bridge due to temperature stress change. However, the damage to bridge construction, bridge safety, and smooth and comfortable running of the vehicle is enormous. The new construction cost is increased, the fund investment for later maintenance is increased, and the service life of the bridge is directly influenced.
The prior art is to pre-embed steel bars in two beam bodies, and weld and manufacture various forms of steel or cement concrete road expansion joints through the pre-embedded steel bars according to the requirement after the two beam bodies are in place. Although the expansion joint has reduced the interval of expansion joint to the maximum extent and increased the flatness, the expansion joint has no problem to be solved fundamentally, the expansion joint exists objectively, and the harm exists. When the vehicle runs through the expansion joint in the bridge, up-and-down deformation, jump, impact, vibration, noise and the like are inevitably generated, so that the expansion joint is always easier to damage than a normal road surface, the running of the vehicle is influenced, and the safety and the service life of the bridge are influenced.
In order to solve the damage of the bridge expansion joint, long-term continuous theoretical research and practical exploration are carried out, but the problem is not fundamentally solved so far. The invention aims to solve the problem of expansion joints on the road surface of a highway bridge.
Disclosure of Invention
The invention provides a seamless integral paving structure and paving process of a bridge asphalt pavement according to the principle that a railway steel rail passes through an expansion joint of a railway bridge below and the principle that the expansion joint of the railway steel rail is connected by using a clamping plate. Firstly, prefabricating key grooves at the telescopic ends of two adjacent beam bodies, then connecting the telescopic ends of the two adjacent beam bodies by using key pins, paving a cover plate on a connecting surface, and completely covering an expansion joint between the two adjacent beam bodies by the cover plate. The beam expansion joint is arranged below the cover plate and can longitudinally and freely expand and contract; the whole asphalt pavement without expansion joints is arranged on the cover plate, so that the road bridge asphalt pavement can be paved in a seamless whole way. The integrity and stability of the bridge are enhanced, and the safety and comfort of driving are improved. All problems of the bridge expansion joint are solved, and all hazards of the bridge expansion joint are eliminated.
The invention is realized in the following way:
the utility model provides a seamless integral pavement structure of bridge bituminous paving, includes the roof beam body and apron, and the breach has been seted up to the tip of the roof beam body, and the apron lid is located on the breach of two adjacent roof beam bodies.
In a preferred embodiment of the invention, the notch includes a first surface parallel to the Liang Tibiao face and a second surface at 45 degrees to Liang Tibiao face.
In a preferred embodiment of the present invention, the first surface is provided with a plurality of keyways, and the keyways may be any one of semicircular keyways, square keyways and triangular keyways;
preferably, the key slot is in the shape of a semicircular key slot.
In a preferred embodiment of the present invention, a metal connecting key pin is further disposed in the semicircular key slot to connect the adjacent two first surfaces, and the metal connecting key pin includes any one of a semicircular key pin, a square key pin and a triangular key pin;
preferably, the metallic connecting key pin is a semicircular key pin. The metal connecting key pin can fully meet the free expansion and contraction between the two beam bodies.
In a preferred embodiment of the present invention, a cover plate is disposed at the top of the semicircular key pin, and the connection manner between the semicircular key pin and the cover plate includes any one of contact connection and welding connection.
In a preferred embodiment of the present invention, the cover plate may be any one of a metal cover plate, a cement prefabricated cover plate and a flexible material cover plate;
preferably, the cover plate is a metal cover plate.
In a preferred embodiment of the present invention, a plurality of cylindrical sleeves are disposed in the middle of the beam body.
In a preferred embodiment of the present invention, a plunger is disposed in the cylindrical sleeve, and adjacent beam bodies are connected through the plunger. The connection can enable the two bridge bodies to stretch out and draw back freely longitudinally, and meanwhile, no vertical and horizontal displacement is generated, so that the integrity of the two bridge bodies is better, and the stability of the whole bridge is improved.
In the preferred embodiment of the invention, the diameter of the plunger is slightly smaller than the inner diameter of the cylindrical sleeve, so that the normal installation is satisfied, and the plunger is made of metal material. The diameter and length of the cylindrical sleeves and the number are dependent on the design of the entire bridge.
The paving process of the bridge asphalt pavement seamless overall paving structure comprises the following steps: and (3) covering the expansion joints of the two beam bodies completely by using a cover plate, and filling the asphalt pavement on the cover plate to the same horizontal plane of the beam bodies. And then the whole bridge deck asphalt is paved integrally, and the bridge deck asphalt is paved without expansion joints.
The beneficial effects of the invention are as follows: the invention provides the seamless integral pavement structure of the bridge asphalt pavement, so that the seamless integral pavement connection of the asphalt pavement on the bridge beam body is realized, the integrity and stability of the bridge are enhanced, and the safety and comfort of driving are improved. In addition, the paving process of the bridge asphalt pavement seamless overall paving structure is simple and convenient, low in cost, long in maintenance period and low in maintenance cost.
Drawings
In order to more clearly illustrate the technical solution of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below. It is to be understood that the following drawings illustrate only certain embodiments of the invention and are therefore not to be considered limiting of its scope, for the person of ordinary skill in the art may admit to other equally relevant drawings without inventive effort.
FIG. 1 is a schematic structural view of embodiment 1 of the present invention;
fig. 2 is a view Liang Tizhu of fig. 1;
FIG. 3 is a top view of the beam of FIG. 1;
FIG. 4 is a schematic structural view of embodiment 2 of the present invention;
fig. 5 is a view Liang Tizuo of embodiment 3 of the present invention;
fig. 6 is a half sectional view of embodiment 3 of the present invention.
Icon: 1-a beam body; 11-a cylindrical sleeve; 2-asphalt pavement; 3-cover plate; 4-notch; 41-a first surface; 411-keyway; 42-a second surface; 5-a plunger; 6-semicircular key pins; 7-an expansion joint; 100-seamless overall pavement structure of bridge asphalt pavement.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of 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, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
Example 1
The invention provides a seamless integral paving structure 100 of a bridge asphalt pavement, which is shown by referring to fig. 1 and 2, and comprises a beam body 1 and a cover plate 3, wherein a notch 4 is formed at the end part of the beam body 1, the cover plate 3 is covered on the notches 4 of two adjacent beam bodies 1, expansion joints of the two beam bodies 1 are completely covered, and an asphalt pavement 2 is paved on the cover plate 3 and the notches 4.
By providing the seamless overall pavement structure 100 for the bridge asphalt pavement, the seamless connection of the asphalt pavement on the adjacent beam bodies 1 is realized, and the structural arrangement of the asphalt pavement ensures that a vehicle does not have impact and vibration or jolt and noise when passing through the expansion joint between the beam bodies 1, thereby improving the safety and comfort of riding.
Further, the beam 1 provided by the invention is a prefabricated beam 1, a slope notch 4 is prefabricated at the end part of the beam 1, and the notch 4 comprises a first surface 41 parallel to the horizontal plane of the beam 1 and a second surface 42 at 45 degrees with the surface of the beam 1. In addition, in other embodiments, the second surface 42 may be disposed at an angle of 60 degrees with respect to the beam 1.
Further, a plurality of key grooves 411 are prefabricated in the first surface 41, as shown with reference to fig. 1 and 3. The shape of the key slot 411 may be any one of a semicircular key slot, a square key slot, and a triangular groove. The key slot 411 selected in the embodiment of the present invention is a semicircular key slot, which is beneficial to the butt-joint installation of the beam body 1.
Further, the depth and the radius of the key slot 411 of the two adjacent beams 1 are equal, and the positions are symmetrically arranged. This arrangement ensures that the metal connector pins can be abutted in the keyways 411 of two adjacent beams 1.
Further, a metal connecting key pin is arranged in the semicircular key groove and used for connecting the first surfaces 41 of the adjacent two beam bodies 1, and in use, the metal connecting key pin is inserted into the semicircular key groove of the adjacent two beam bodies 1.
Further, the metal connecting key pin includes any one of a semicircular key pin, a square key pin and a triangular key pin, and in this embodiment, the metal connecting key pin is a semicircular key pin 6.
Further, the length of the semicircular key pin 6 is the difference between the total length of the semicircular key grooves of the two beam bodies 1 and the length of the expansion joint. In this way, a certain gap is left in the key slot 411 to ensure that two adjacent beams 1 can be extended and retracted longitudinally.
Further, a cover plate 3 is arranged on the top of the semicircular key pin 6, and the connection mode of the semicircular key pin 6 and the cover plate 3 comprises any one of contact connection and welding connection. The connection mode adopted by the embodiment of the invention is contact connection. In other embodiments, when welding is adopted, the bottom end of the cover plate 3 and the top end of the semicircular key pin 6 may be welded.
The cover plate 3 is arranged at the top of the semicircular key pin 6, and the semicircular key pin 6 has very stable supporting effect on the cover plate 3, so that the cover plate 3 can bear larger pressure. Meanwhile, the asphalt pavement 2 is filled above the cover plate 3, so that the cover plate 3 can be compacted, and the cover plate 3 is prevented from sliding relatively.
Further, the cover plate 3 may be any one of a metal cover plate, a cement prefabricated cover plate, and a flexible material cover plate. The embodiment of the invention adopts a metal cover plate. The material of the cover plate 3 is selected to meet the requirements of impact and vibration generated during running and rolling of the bridge deck vehicle, and the firmness of the roadbed is not affected.
Further, the surface of the cover plate 3 may be subjected to technical treatment, both ends of the cover plate 3 may be designed into a comb-tooth shape, and the upper edges of the comb-tooth shape of the cover plate 3 may be chamfered.
Further, referring to fig. 1, asphalt pavement 2 is packed on the cover plate 3 until the asphalt pavement 2 is on the same level as the upper planes of the two beams 1.
Example 2
Embodiment 2 is a simplified version of embodiment 1.
Referring to fig. 4, this embodiment provides a simplified beam structure as compared with embodiment 1. A key slot 411 is formed in one end of the telescopic beam body 1, a semicircular key pin 6 is arranged in the key slot 411, and two adjacent beam bodies 1 are connected through the semicircular key pin 6.
The top of the semicircular key pin 6 is provided with the cover plate 3, the cover plate 3 can be directly paved, and also can be welded on the semicircular key pin 6, the cover plate 3 completely covers expansion joints of two beam ends, and the cover plate 3 and the upper planes of the two beam bodies 1 are on a horizontal plane. In this way, the two beam bodies 1 are connected through the key pin 6, and the cover plate 3 completely covers the expansion joint 7, so that the upper surface of the whole bridge body forms an integral plane, and the seamless integral pavement of the asphalt pavement of the bridge is realized.
By the simplest beam structure provided in the embodiment 2, the seamless overall pavement of the asphalt pavement of the bridge is very easy to realize. All problems of the existing bridge expansion joint are solved, and all hazards of the existing bridge expansion joint are eliminated.
Example 3
Referring to fig. 5 and 6, a plurality of cylindrical sleeves 11 are prefabricated in the middle of the beam body 1, and the plungers 5 are provided in the cylindrical sleeves 11. The cylindrical sleeves 11 of two adjacent beam bodies 1 are connected in a penetrating manner through the plunger 5. The arrangement can effectively and firmly connect the end parts of the two beam bodies 1, does not generate vertical and horizontal displacement, and can normally perform longitudinal expansion and contraction.
The cylindrical sleeve 11 can realize the connection of the two beam bodies 1, enhance the stability of a bridge, generate no vertical and horizontal displacement, and can meet the requirement of longitudinal expansion of the two beam bodies. Two adjacent bridge ends are formed into a whole, so that the whole bridge is firmer.
Further, in this embodiment, two cylindrical sleeves 11 are provided, and referring to fig. 5 and 6, the diameter of the plunger 5 is slightly smaller than the inner diameter of the cylindrical sleeve 11, so that normal installation is satisfied, and the material of the plunger 5 is a metal material.
The above examples 1-3 were paved using the following procedure. The paving process of the bridge asphalt pavement seamless integral paving structure 100 comprises the following steps of: inserting the plunger 5 into the cylindrical sleeves 11 of two adjacent beams; the semicircular key pin 6 is inserted into the semicircular key slot, the cover plate 3 is paved on the semicircular key pin 6, the cover plate 3 completely covers the expansion joint 7, and the cover plate 3 is filled with the asphalt pavement 2 to the same horizontal plane of the beam body 1. After the treatment by the process, the upper surface of the bridge expansion joint 7 and the upper planes of the two beam bodies 1 form a complete horizontal plane, and then the construction of leveling is carried out, so that the construction of the seamless overall pavement of the asphalt pavement on the upper surface of the whole bridge can be completed.
Furthermore, the bridge asphalt pavement seamless overall paving structure 100 provided by the invention can cover any width expansion joint 7, so that the bridge asphalt pavement seamless overall paving structure 100 provided by the invention has a great application prospect.
The beneficial effects of the invention are as follows: the seamless overall pavement structure of the bridge asphalt pavement provided by the invention realizes the seamless overall pavement connection of the bridge asphalt pavement, enhances the integrity and stability of the bridge, and improves the safety and comfort of driving. In addition, the paving technology of the bridge asphalt pavement seamless overall paving structure is simple and convenient, low in cost and long in maintenance period.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and various modifications and variations may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The seamless integral paving structure for the bridge asphalt pavement is characterized by comprising a beam body and cover plates, wherein a notch is formed in the end part of the beam body, and the cover plates are covered on the notches of two adjacent beam bodies; the notch comprises a first surface parallel to the Liang Tibiao surface and a second surface 45 degrees away from the Liang Tibiao surface; the first surface is provided with a plurality of key grooves, and the key grooves are any one of semicircular key grooves, square key grooves and triangular key grooves; a metal connecting key pin is further arranged in the key groove to connect the adjacent two first surfaces, and the metal connecting key pin comprises any one of a semicircular key pin, a square key pin and a triangular key pin; the top of the metal connecting key pin is provided with the cover plate, and the cover plate is any one of a metal cover plate, a cement prefabricated cover plate and a flexible material cover plate; the connection mode of the semicircular key pin and the cover plate comprises any one of contact connection and welding connection; the middle of the beam body is provided with a plurality of cylindrical sleeves.
2. The bridge asphalt pavement seamless overall pavement structure according to claim 1, wherein the key slot is in the shape of a semicircular key slot.
3. The bridge asphalt pavement seamless overall paving structure according to claim 1, wherein the metal connecting key pin is a semicircular key pin.
4. The bridge asphalt pavement seamless overall paving structure according to claim 1, wherein the cover plate is a metal cover plate.
5. The bridge asphalt pavement seamless overall paving structure according to claim 1, wherein a plunger is arranged in the cylindrical sleeve, and adjacent beam bodies are connected through the plunger in a penetrating manner.
6. The bridge asphalt pavement seamless overall paving structure according to claim 5, wherein the diameter of the plunger is slightly smaller than the inner diameter of the cylindrical sleeve, and the plunger is made of metal material.
7. A process for paving the seamless overall paving structure of the bridge asphalt pavement according to any one of claims 1 to 6, comprising: and the cover plates are used for completely covering the expansion joints of two adjacent beam bodies, and asphalt pavement is filled on the cover plates to the same horizontal plane of the beam bodies.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910108334.3A CN109653090B (en) | 2019-01-18 | 2019-01-18 | Bridge asphalt pavement seamless overall paving structure and paving process thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910108334.3A CN109653090B (en) | 2019-01-18 | 2019-01-18 | Bridge asphalt pavement seamless overall paving structure and paving process thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109653090A CN109653090A (en) | 2019-04-19 |
| CN109653090B true CN109653090B (en) | 2024-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910108334.3A Active CN109653090B (en) | 2019-01-18 | 2019-01-18 | Bridge asphalt pavement seamless overall paving structure and paving process thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2063538U (en) * | 1990-03-24 | 1990-10-10 | 上海市政工程设计院 | Bridge body and spherical plate type rubber bearing |
| CN101701448A (en) * | 2009-11-19 | 2010-05-05 | 潘志洪 | Bridge expansion joint structure |
| CN207295435U (en) * | 2017-09-07 | 2018-05-01 | 浙江省大成建设集团有限公司 | Bridge expanssion joint built-in integral drainage arrangement |
| CN209686234U (en) * | 2019-01-18 | 2019-11-26 | 余艳 | A kind of seamless entirety paving structure of bridge bituminous pavement |
-
2019
- 2019-01-18 CN CN201910108334.3A patent/CN109653090B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2063538U (en) * | 1990-03-24 | 1990-10-10 | 上海市政工程设计院 | Bridge body and spherical plate type rubber bearing |
| CN101701448A (en) * | 2009-11-19 | 2010-05-05 | 潘志洪 | Bridge expansion joint structure |
| CN207295435U (en) * | 2017-09-07 | 2018-05-01 | 浙江省大成建设集团有限公司 | Bridge expanssion joint built-in integral drainage arrangement |
| CN209686234U (en) * | 2019-01-18 | 2019-11-26 | 余艳 | A kind of seamless entirety paving structure of bridge bituminous pavement |
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| Publication number | Publication date |
|---|---|
| CN109653090A (en) | 2019-04-19 |
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