CN104674657A - Profiled steel sheet-UHP (ultra high performance) fiber reinforced concrete composite bridge deck - Google Patents
Profiled steel sheet-UHP (ultra high performance) fiber reinforced concrete composite bridge deck Download PDFInfo
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- CN104674657A CN104674657A CN201410717269.1A CN201410717269A CN104674657A CN 104674657 A CN104674657 A CN 104674657A CN 201410717269 A CN201410717269 A CN 201410717269A CN 104674657 A CN104674657 A CN 104674657A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 114
- 239000010959 steel Substances 0.000 title claims abstract description 114
- 239000011210 fiber-reinforced concrete Substances 0.000 title claims abstract description 27
- 229920006253 high performance fiber Polymers 0.000 title abstract description 17
- 239000002131 composite material Substances 0.000 title abstract description 11
- 230000002787 reinforcement Effects 0.000 claims description 22
- 238000003466 welding Methods 0.000 claims description 2
- 239000011148 porous material Substances 0.000 claims 5
- 238000010276 construction Methods 0.000 abstract description 10
- 239000004567 concrete Substances 0.000 description 9
- 239000000835 fiber Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 230000032798 delamination Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 238000009415 formwork Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910021487 silica fume Inorganic materials 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000006004 Quartz sand Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 239000011384 asphalt concrete Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
Classifications
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- 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
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/262—Concrete reinforced with steel fibres
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/268—Composite concrete-metal
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
一种压型钢板-超高性能纤维增强混凝土组合桥面板，包括凹形压型钢板、开孔钢板、竖向栓钉、横向、纵向钢筋、超高性能纤维增强混凝土，凹形压型钢板凹槽中心固定有竖立的、纵向设置的开孔钢板，其凸部设若干列固定的竖向栓钉，开孔钢板上的连接孔内贯穿横向钢筋并与竖向栓钉上端焊接，横向钢筋垂直方向设有纵向钢筋，与横向钢筋和竖向栓钉连接点固接，超高性能纤维增强混凝土浇筑在凹形压型钢板内，将开孔钢板、竖向栓钉、横向、纵向钢筋覆盖；本发明改善了压型钢板和超高性能纤维增强混凝土之间的界面粘结性能，充分发挥了两者的力学优势，具有自重轻、承载力大、抗疲劳性能优异等特点，可工厂化生产和现场组拼，加快建造和更换桥面板速度。
A profiled steel plate-ultra-high-performance fiber-reinforced concrete composite bridge deck, including concave-shaped profiled steel plates, perforated steel plates, vertical studs, transverse and longitudinal steel bars, ultra-high-performance fiber-reinforced concrete, and concave-shaped profiled steel plates The center of the slot is fixed with an upright, longitudinally arranged perforated steel plate, and several rows of fixed vertical pegs are arranged on the convex part. The connection holes on the perforated steel plate run through the horizontal steel bars and are welded with the upper ends of the vertical pegs. The horizontal steel bars are vertical Longitudinal steel bars are provided in the direction, fixedly connected with the connection points of horizontal steel bars and vertical studs, ultra-high-performance fiber reinforced concrete is poured in concave profiled steel plates, and the perforated steel plates, vertical studs, horizontal and longitudinal steel bars are covered; The invention improves the interface bonding performance between the profiled steel plate and the ultra-high-performance fiber-reinforced concrete, fully exerts the mechanical advantages of the two, has the characteristics of light weight, large bearing capacity, and excellent fatigue resistance, and can be industrialized. Combine with on-site assembly to speed up the construction and replacement of bridge decks.
Description
技术领域 technical field
本发明涉及桥梁工程领域，涉及一种组合桥面板。 The invention relates to the field of bridge engineering, in particular to a composite bridge deck.
背景技术 Background technique
随着我国交通事业的迅速发展，正交异性钢桥面板在大跨桥梁结构中得到了广泛的应用。然而，经过多年的运营，正交异性钢桥面沥青铺装层相继出现了纵横向裂缝、车辙、脱层、推移、坑槽鼓包以及与钢桥面的脱离等病害，而正交异性钢板自身刚度的不足以及焊缝处焊接缺陷和应力集中导致的疲劳破坏也不容忽视。尤其是近年来，我国出现了众多的大型车辆，其轮压大大超过设计荷载，更进一步加剧了正交异性钢桥面板上述病害的发展。 With the rapid development of my country's transportation industry, orthotropic steel bridge decks have been widely used in long-span bridge structures. However, after years of operation, the orthotropic steel deck asphalt pavement has successively suffered from longitudinal and transverse cracks, rutting, delamination, shifting, pothole bulging, and detachment from the steel deck, while the orthotropic steel deck itself Insufficient rigidity and fatigue damage caused by welding defects and stress concentration at the weld cannot be ignored. Especially in recent years, many large vehicles have appeared in our country, and their wheel pressure greatly exceeds the design load, which further aggravates the development of the above-mentioned diseases of orthotropic steel bridge decks.
目前，已有工钢梁、普通混凝土预制板、沥青混凝土面层组合桥面板和正交异性钢板、薄层活性粉末混凝土面层组合桥面板对传统的正交异性钢桥面板进行代替，但前者组合桥面板较厚，自重较大；后者虽能极大的增加组合桥面板的刚度，减少应力幅值，但并未从根本上解决正交异性钢板可能出现的疲劳破坏以及平钢板与活性粉末混凝土之间可能出现的界面粘结破坏、层间滑移、局部鼓包、脱层等病害。 At present, there are industrial steel beams, ordinary concrete prefabricated slabs, asphalt concrete surface composite bridge decks, orthotropic steel plates, and thin-layer active powder concrete surface composite bridge decks to replace traditional orthotropic steel bridge decks, but the former The composite bridge deck is thicker and its own weight is larger; although the latter can greatly increase the stiffness of the composite bridge deck and reduce the stress amplitude, it does not fundamentally solve the possible fatigue damage of the orthotropic steel plate and the interaction between the flat steel plate and the active Interfacial bond failure, interlayer slippage, local bulging, delamination and other diseases that may occur between powder concrete.
超高性能纤维增强混凝土具有强度高、韧性大和耐久性能优异等特点；压型钢板相对于正交异性钢板，可提高结构的抗弯、抗剪能力，减少结构焊缝的数量、改善混凝土与钢板之间的界面粘结性能。 Ultra-high-performance fiber-reinforced concrete has the characteristics of high strength, high toughness, and excellent durability; compared with orthotropic steel plates, profiled steel plates can improve the bending and shear resistance of the structure, reduce the number of structural welds, and improve the strength of concrete and steel plates. interfacial bonding properties.
发明内容 Contents of the invention
本发明所要解决的技术问题是提供一种自重轻、承载力大、抗疲劳性能优异并能改善钢板与混凝土之间界面粘结性能的压型钢板-超高性能纤维增强混凝土组合桥面板。 The technical problem to be solved by the present invention is to provide a profiled steel plate-ultra-high performance fiber reinforced concrete composite bridge deck with light weight, large bearing capacity, excellent fatigue resistance and improved interface bonding performance between steel plate and concrete.
为实现上述目的，本发明采用如下技术方案。 In order to achieve the above object, the present invention adopts the following technical solutions.
本发明包括凹形压型钢板（1）、开孔钢板（2）、竖向栓钉（3）、横向钢筋（5）、纵向钢筋（6）、超高性能纤维增强混凝土（7）。在凹形压型钢板（1）凹槽中心固定有竖立的、纵向设置的开孔钢板（2），凹形压型钢板（1）的凸部设有若干列固定的竖向栓钉（3），在开孔钢板（2）上的连接孔（4）内贯穿横向钢筋（5）并与竖向栓钉（3）上端焊接，在与横向钢筋（5）垂直方向上设置有纵向钢筋（6），纵向钢筋（6）位于横向钢筋（5）上方，并与横向钢筋（5）和竖向栓钉（3）的连接点固接，超高性能纤维增强混凝土浇筑在凹形压型钢板（1）内，并将开孔钢板（2）、竖向栓钉（3）、横向钢筋（5）和纵向钢筋（6）全部覆盖。 The invention includes a concave profiled steel plate (1), a perforated steel plate (2), a vertical stud (3), a transverse steel bar (5), a longitudinal steel bar (6), and ultra-high-performance fiber-reinforced concrete (7). An upright, longitudinally arranged perforated steel plate (2) is fixed in the center of the groove of the concave profiled steel plate (1), and several rows of fixed vertical pegs (3) are provided on the convex part of the concave profiled steel plate (1). ), the connecting hole (4) on the perforated steel plate (2) runs through the transverse reinforcement (5) and is welded to the upper end of the vertical peg (3), and a longitudinal reinforcement ( 6), the longitudinal steel bar (6) is located above the horizontal steel bar (5), and is fixed to the connection point of the horizontal steel bar (5) and the vertical stud (3), and the ultra-high performance fiber reinforced concrete is poured on the concave profiled steel plate (1), and cover all the perforated steel plates (2), vertical studs (3), transverse reinforcement (5) and longitudinal reinforcement (6).
所述的超高性能纤维增强混凝土（7）抗压强度不低于120MPa，抗拉强度不低于20MPa，材料断裂韧性达到20~40 kJ/m2，氯离子扩散系数仅为(0.02-0.04)×10-12 m2/s。 The ultra-high-performance fiber-reinforced concrete (7) has a compressive strength of not less than 120 MPa, a tensile strength of not less than 20 MPa, a material fracture toughness of 20-40 kJ/m 2 , and a chloride ion diffusion coefficient of only (0.02-0.04 )×10 -12 m 2 /s.
所述的开孔钢板（2）与凹形压型钢板（1）之间采用双面焊接，其连接孔（4）高于凹形压型钢板（1）的凸面，低于竖向栓钉（3）的顶面。 The perforated steel plate (2) and the concave profiled steel plate (1) are welded on both sides, and the connection hole (4) is higher than the convex surface of the concave profiled steel plate (1) and lower than the vertical peg (3) the top surface.
所述的凹形压型钢板（1）与超高性能纤维增强混凝土（7）之间通过纵向开孔钢板（2）、竖向栓钉（3）、横向钢筋（5）和纵向钢筋（6）组成的抗剪连接件紧密结合。 The concave profiled steel plate (1) and the ultra-high performance fiber reinforced concrete (7) are passed through the longitudinal perforated steel plate (2), vertical studs (3), transverse steel bars (5) and longitudinal steel bars (6) ) The shear connectors composed of ) are tightly combined.
本发明的优点：（1）凹形压型钢板在工厂制作，施工中作为超高性能纤维增强混凝土浇筑的模板，使用中作为永久结构，节省了模板，降低了造价；（2）凹形压型钢板相对于正交异性钢板，可提高结构的抗弯、抗剪能力，减少结构焊缝的数量、改善混凝土与钢板之间的界面粘结性能，进而取得优异的抗疲劳性能；（3）在凹形压型钢板上设置竖向栓钉和纵向开孔钢板，横向钢筋贯穿开孔钢板的连接孔并与竖向栓钉焊接，确保了凹形压型钢板与超高性能纤维增强混凝土之间的紧密连接；（4）将凹形压型钢板与超高性能纤维增强混凝土结合形成钢-混组合结构，能充分利用超高性能纤维增强混凝土的抗压、抗拉性能以及凹形压型钢板的抗拉性能，减轻结构自重，提高结构承载力；（5）组合桥面板在工厂养护成型，现场组装，便于施工质量的控制，可加快建造和更换速度，缩短工期。 Advantages of the present invention: (1) Concave profiled steel plate is produced in the factory, used as formwork for ultra-high performance fiber reinforced concrete pouring during construction, and used as a permanent structure during use, saving formwork and reducing cost; (2) Concave profiled steel plate Compared with orthotropic steel plates, shaped steel plates can improve the bending and shear resistance of the structure, reduce the number of structural welds, improve the interface bonding performance between concrete and steel plates, and achieve excellent fatigue resistance; (3) Vertical studs and longitudinal perforated steel plates are set on the concave profiled steel plate, and the horizontal steel bar runs through the connection hole of the perforated steel plate and is welded with the vertical pegs, ensuring the connection between the concave profiled steel plate and the ultra-high performance fiber reinforced concrete. (4) Combining the concave profiled steel plate with ultra-high performance fiber reinforced concrete to form a steel-concrete composite structure, which can make full use of the compressive and tensile properties of ultra-high performance fiber reinforced concrete and concave compression The tensile performance of the steel plate reduces the weight of the structure and improves the structural bearing capacity; (5) The composite bridge deck is maintained and formed in the factory and assembled on site, which facilitates the control of construction quality, speeds up construction and replacement, and shortens the construction period.
综上所述，本发明不仅改善了凹形压型钢板和超高性能纤维增强混凝土之间的界面粘结性能，而且充分发挥了两种材料的力学优势，具有结构自重轻、承载力大、抗疲劳性能优异等特点，通过工厂化生产和现场组拼，可加快建造和更换桥面板速度，缩短工期。 To sum up, the present invention not only improves the interface bonding performance between the concave profiled steel plate and the ultra-high performance fiber reinforced concrete, but also fully exerts the mechanical advantages of the two materials, and has the advantages of light structure weight, large bearing capacity, Excellent fatigue resistance and other characteristics, through factory production and on-site assembly, can speed up the construction and replacement of bridge decks, and shorten the construction period.
附图说明 Description of drawings
图1 本发明横断面示意图。 Fig. 1 is a cross-sectional schematic diagram of the present invention.
图2 本发明整体结构示意图。 Figure 2 is a schematic diagram of the overall structure of the present invention.
图中：1为凹形压型钢板，2为开孔钢板，3为竖向栓钉，4为连接孔，5为横向钢筋，6为纵向钢筋，7为超高性能纤维增强混凝土。 In the figure: 1 is a concave profiled steel plate, 2 is a perforated steel plate, 3 is a vertical stud, 4 is a connecting hole, 5 is a transverse steel bar, 6 is a longitudinal steel bar, and 7 is ultra-high performance fiber reinforced concrete.
具体实施方式 Detailed ways
下面结合附图和实施例对本发明作进一步说明。 The present invention will be further described below in conjunction with drawings and embodiments.
如图1和图2所示，包括凹形压型钢板1、开孔钢板2、竖向栓钉3、横向钢筋5、纵向钢筋6、超高性能纤维增强混凝土7。在凹形压型钢板1凹处设置开孔钢板2，凸处设置竖向栓钉3，在开孔钢板连接孔4内贯穿横向钢筋5并与竖向栓钉3上方焊接，在与横向钢筋5垂直方向上设置有纵向钢筋6，纵向钢筋6位于横向钢筋5上方，并与横向钢筋5和竖向栓钉3的连接点固接，超高性能纤维增强混凝土浇筑在凹形压型钢板1内，并将开孔钢板2、竖向栓钉3、横向钢筋5和纵向钢筋6全部覆盖。 As shown in Figures 1 and 2, it includes concave profiled steel plate 1, perforated steel plate 2, vertical stud 3, transverse steel bar 5, longitudinal steel bar 6, and ultra-high performance fiber reinforced concrete 7. The perforated steel plate 2 is set in the recess of the concave profiled steel plate 1, the vertical peg 3 is set at the protruding part, the horizontal steel bar 5 runs through the connecting hole 4 of the perforated steel plate and is welded with the vertical peg 3, and the vertical peg 3 is welded with the horizontal steel bar 5. A longitudinal steel bar 6 is provided in the vertical direction. The longitudinal steel bar 6 is located above the horizontal steel bar 5 and fixedly connected to the connection point between the horizontal steel bar 5 and the vertical stud 3. The ultra-high performance fiber reinforced concrete is poured on the concave profiled steel plate 1 Inside, and cover the perforated steel plate 2, the vertical stud 3, the transverse reinforcement 5 and the longitudinal reinforcement 6 completely.
以常用的带纵梁和横梁的框架式桥梁为例，具体的实施方式如下。 Taking the commonly used frame bridge with longitudinal girders and cross girders as an example, the specific implementation methods are as follows.
凹形压型钢板加工成型：凹形压型钢板由平钢板在工厂冷压成型，其中钢板厚6-12mm，凸处宽度与凹处宽度比为2-4，单块压型钢板宽度取框架式桥梁中相邻横梁中心距的1-3倍，长度为6-8m，下料时纵向切割位置位于凹型钢板的凸面。 Concave profiled steel plate processing and forming: concave profiled steel plate is formed by cold pressing of flat steel plate in the factory, the thickness of the steel plate is 6-12mm, the ratio of the width of the convex part to the width of the concave part is 2-4, and the width of a single profiled steel plate is taken as the frame 1-3 times the center distance of adjacent beams in the type bridge, the length is 6-8m, and the longitudinal cutting position is located on the convex surface of the concave steel plate when blanking.
形成抗剪连接件。为确保凹形压型钢板与超高性能纤维增强混凝土之间的紧密结合，在凹形压型钢板凹槽中心均双面焊接一块纵向开孔钢板，凸部焊接竖向栓钉，在开孔钢板连接孔内贯穿横向钢筋并与竖向栓钉上方焊接，在横向钢筋上方与竖向栓钉相交处均设置一根与之垂直的纵向钢筋。抗剪连接件在工厂制作完成，其中开孔钢板厚度为5-10mm，连接孔纵向间距与竖向栓钉一致，均为0.2-0.5m，高度高于凹形压型钢板的凸面，低于竖向栓钉的顶面，纵向钢筋与横向钢筋之间通过钢丝绑扎连接，纵向钢筋、横向钢筋和竖向栓钉直径以及单个凸面竖向栓钉列数根据组合桥面板受力情况由计算来确定。 Form a shear connection. In order to ensure the tight combination between the concave profiled steel plate and the ultra-high-performance fiber reinforced concrete, a steel plate with longitudinal holes is welded on both sides in the center of the groove of the concave profiled steel plate, and the convex part is welded with vertical studs. The connecting hole of the steel plate runs through the horizontal steel bar and is welded to the top of the vertical peg, and a vertical steel bar perpendicular to it is arranged at the intersection of the top of the horizontal steel bar and the vertical peg. The shear connectors are finished in the factory, the thickness of the perforated steel plate is 5-10mm, the longitudinal spacing of the connecting holes is consistent with the vertical studs, both are 0.2-0.5m, and the height is higher than the convex surface of the concave profiled steel plate and lower than The top surface of the vertical stud, the longitudinal reinforcement and the transverse reinforcement are connected by steel wire binding, the diameter of the longitudinal reinforcement, the transverse reinforcement and the vertical stud, and the number of rows of vertical studs on a single convex surface are calculated according to the force of the composite bridge deck Sure.
浇筑超高性能纤维增强混凝土。超高性能纤维增强混凝土是一种钢纤维增强活性粉末混凝土，其材料断裂韧性达到20~40 kJ/m2，氯离子扩散系数仅为(0.02-0.04)×10-12 m2/s。制作时，首先将石英砂、水泥、硅灰、硅粉倒入强制式搅拌机，干拌5-8分钟；然后将溶有减水剂的全部用水量一次性倒入，搅拌至出现流动性征后再延续5-10分钟；最后掺入钢纤维继续搅拌至钢纤维均匀。制作完成后，在凹形压型钢板内浇筑将开孔钢板、竖向栓钉、横向钢筋和纵向钢筋包含在内的超高性能纤维增强混凝土，浇筑完成覆盖养护24h脱模，再在80±5oC高温下养护48h后，冷却到室温。所有浇筑工序均在工厂完成，要求浇筑时四边各预留10cm作为施工接缝，浇筑后混凝土抗压强度不低于120MPa，抗拉强度不低于20MPa。 Pouring ultra-high performance fiber reinforced concrete. Ultra-high performance fiber reinforced concrete is a kind of steel fiber reinforced reactive powder concrete. The fracture toughness of the material reaches 20~40 kJ/m 2 , and the chloride ion diffusion coefficient is only (0.02-0.04)×10 -12 m 2 /s. When making, first pour the quartz sand, cement, silica fume, and silica fume into the forced mixer, and dry mix for 5-8 minutes; then pour all the water dissolved in the water reducer at one time, and stir until fluidity appears Continue for another 5-10 minutes; finally add steel fiber and continue stirring until the steel fiber is uniform. After the production is completed, pour ultra-high performance fiber-reinforced concrete including the perforated steel plate, vertical studs, transverse steel bars and longitudinal steel bars in the concave profiled steel plate. After curing at 5oC for 48 hours, cool to room temperature. All the pouring process is completed in the factory, and it is required to reserve 10cm on each of the four sides as the construction joint during pouring. After pouring, the compressive strength of the concrete should not be lower than 120MPa, and the tensile strength should not be lower than 20MPa.
吊装就位浇筑接缝。桥面板工厂预制完成后，采用大型运输设备如运梁车运抵施工现场，通过桥面吊机吊装就位，为保证桥面板和纵梁之间变形协调，在两者之间每隔6-8m设置一个橡胶支座，其吨位由组合桥面板的重量确定；吊装完成后首先将接缝处凹形压型钢板焊接形成整体，然后将开孔钢板纵向焊接贯通，为保证桥面板整体性，接缝处横向钢筋和纵向钢筋需连接贯通；接缝处连接件形成后，在接缝处凹形压型钢板上浇筑超高性能纤维增强混凝土，浇筑完成覆盖养护24h脱模，再在80±5oC高温下养护48h后，冷却到室温，待所有接缝浇筑养护到位后进行桥面铺装的施工。 Lifting and pouring joints in place. After the bridge deck is prefabricated in the factory, it will be transported to the construction site with large-scale transportation equipment such as girder trucks, and hoisted into place by the bridge deck crane. A rubber bearing is installed at 8m, the tonnage of which is determined by the weight of the combined bridge deck; after the hoisting is completed, the concave profiled steel plates at the joints are first welded to form a whole, and then the perforated steel plates are welded through longitudinally. In order to ensure the integrity of the bridge deck, The horizontal reinforcement and longitudinal reinforcement at the joints need to be connected through; after the joints are formed, ultra-high performance fiber reinforced concrete is poured on the concave profiled steel plate at the joints. After curing for 48 hours at a high temperature of 5oC, cool to room temperature, and carry out bridge deck pavement construction after all joints are poured and cured in place.
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