Durable bridge deck continuous structure

Abstract

The utility model relates to the technical field of bridge engineering, in particular to a durable bridge deck continuous structure. Comprising a main beam and a continuous bridge section arranged on the surface of the main beam, a plurality of prefabricated part bridge deck pavement steel bars connected with the main beam are reserved in the continuous bridge section in the horizontal direction, and a plurality of anchor bolt holes are formed in the lower end face of the continuous bridge section in the vertical direction; the anchor bolt holes are connected with pre-embedded anchor bolts on the surface of the main beam, so that the continuous bridge section is stably connected with the main beam in the transverse direction and the longitudinal direction. The durable bridge deck continuous structure has the advantages of being good in durability, better in stability and firmness, longer in service life, convenient to construct, wide in application range, simple in structure, convenient to operate and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, in particular to a durable bridge deck continuous structure. Background Art

[0002] For medium and small bridges, as well as the approach bridges of large bridges, a commonly used structural form is a simple support followed by a continuous deck structure. The main beam is a simply supported beam system. To improve driving comfort, expansion joints between spans are eliminated, and the deck is formed into a single piece using the pavement layer. The continuous deck section in this structural system is the weakest point in the entire structure. In actual use, it often cracks and fails due to its thin thickness, insufficient shear strength, and repeated impact from heavy vehicles. This seriously impacts bridge driving safety. Common structural measures for the continuous deck section include reinforcing it with steel bars and using high-strength concrete. These treatment methods can mitigate the rate of continuous deck damage to a certain extent, but due to the thickness of the continuous deck section, their effectiveness is limited and they fail to fundamentally solve the problem of the continuous deck being easily damaged.

[0003] Chinese patent CN207227946U discloses a crack-resistant continuous bridge deck structure, comprising a reinforced concrete pavement section, shear bolts, and rubber pads. The shear bolts are installed on the upper surface of the beams, extending 60-80 cm inward from the ends of beams L1 and L2 along the longitudinal direction of the bridge. Three or four rows of shear bolts are evenly spaced longitudinally, and rows of shear bolts are evenly spaced transversely at 30-50 cm intervals, depending on the width of the bridge deck. The lower portion of the shear bolts is located within the beams, and the outer portion of the upper portion of the shear bolts is sheathed with rubber pads. The upper portion of the shear bolts and the rubber pads are located within the reinforced concrete pavement section. This structure achieves bridge deck continuity by installing reinforced sections at the joints of simply supported beams. Measures are taken to prevent the bond between the main beam and the concrete pavement within a certain range of the reinforced sections from failing. This increases the longitudinal length of the concrete pavement involved in deformation within the continuous structure, effectively preventing the continuous structure from cracking during use.

[0004] However, this technical solution can only stabilize the bridge deck in the longitudinal direction and connect it horizontally through a single concrete, resulting in an unstable structure, insufficient durability and short service life. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings of the existing technology and provide a durable bridge deck continuous structure. The bridge deck paving steel bars of the prefabricated part of the continuous bridge section are fixedly connected to the main beam. The anchor holes vertically arranged in the continuous bridge section are inserted into the pre-embedded anchor bolts of the main beam, thereby realizing the function of the continuous bridge section to firmly connect the main beam in both the horizontal and longitudinal directions, thereby solving the problems of unstable structure and insufficient durability of the existing technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A durable bridge deck continuous structure includes: a main beam and a continuous bridge section arranged above the main beam, the continuous bridge section is provided with a plurality of prefabricated partial bridge deck paving steel bars connected to the main beam in the horizontal direction, and the lower end face of the continuous bridge section is provided with a plurality of anchor holes in the vertical direction, the anchor holes are connected to the embedded anchors on the surface of the main beam, so that the continuous bridge section is firmly connected to the main beam in both the horizontal and longitudinal directions.

[0008] Preferably, a steel plate is provided on the surface of the main beam.

[0009] Preferably, the steel plate is welded to the embedded anchor bolts.

[0010] Preferably, studs are welded on the steel plate, and the studs are fixedly connected to the continuous bridge section.

[0011] Preferably, the stud and the embedded anchor bolt are spaced apart.

[0012] Preferably, bridge deck pavement steel bars are respectively provided at both ends of the main beam, and the bridge deck pavement steel bars are welded to the prefabricated bridge deck pavement steel bars.

[0013] Preferably, the main beam is connected to the continuous bridge section by injecting high-strength cement mortar into the anchor holes.

[0014] Preferably, the surface of the continuous bridge section is paved with a waterproof layer.

[0015] Preferably, the surface of the waterproof layer is paved with an asphalt layer.

[0016] Preferably, a slit is formed in the middle of the continuous bridge segment.

[0017] Preferably, asphalt paste is filled into the cut seam.

[0018] The beneficial effects of the present invention are:

[0019] (1) The utility model effectively connects the continuous bridge section with other parts of the bridge by inserting the anchor holes on the continuous bridge section into the pre-buried anchor bolts on the main beam and then injecting high-strength cement mortar into the anchor holes. This forms a unified whole that is jointly stressed and is easy to construct.

[0020] (2) The utility model welds the embedded anchor bolts to the steel plates, and the steel plates increase the stress-bearing area of ​​the embedded anchor bolts, so that the embedded anchor bolts are more stable and firm when inserted into the anchor bolt holes, thereby ensuring the stability and firmness between the main beam and the continuous bridge section, and having better durability, thereby ensuring the service life of the entire bridge.

[0021] (3) The utility model directly installs the prefabricated continuous bridge section on the main beam, and does not need to be cast on site. This is mainly because the continuous bridge section can be constructed in a factory, which can not only ensure the construction quality, but also shorten the construction period. It can also take advantage of the high strength and good durability of UHPC. At the same time, this bridge deck continuous scheme is applicable to various concrete main beams, such as common small box beams, T beams, hollow slabs, etc., and has strong applicability.

[0022] (4) The utility model lays a waterproof layer on the surface of the continuous bridge section. The waterproof layer has the advantages of heat resistance, cold resistance, corrosion resistance, aging resistance, good thermoplasticity, high tensile strength, high elongation, and strong tear resistance, which makes the waterproof layer more waterproof and further ensures the service life of the continuous bridge section.

[0023] (5) The utility model lays an asphalt layer on the surface of the waterproof layer. The asphalt pavement is made of a mixture of petroleum asphalt and sand and gravel. It has good softness and elasticity, a smooth surface, no joints, comfortable driving, low vibration, low noise, wear resistance, and can withstand the impact of temperature changes and earthquakes. It is not easy to crack or break. In addition, the asphalt pavement is laid quickly, the construction period is short, and the impact on traffic is small. The asphalt pavement has high anti-skid properties, which can reduce the slipping of vehicles on rainy or snowy days and improve driving safety.

[0024] (6) The utility model adopts 16mm Q345 steel plate, which has good weldability, plasticity and reliability. The steel plate also has high strength and corrosion resistance, and is suitable for various harsh working environments, with a wide range of applications and low cost.

[0025] In summary, the utility model has the advantages of good durability, better stability and firmness, longer service life, convenient construction, wide range of applications, simple structure and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0027] Figure 2 for Figure 1 A magnified view of point A;

[0028] Figure 3 for Figure 1 Enlarged view of point B;

[0029] Figure 4 It is a cross-sectional view of the continuous bridge section of the utility model;

[0030] Figure 5 It is a top view of the utility model.

[0031] Figure numerals: 1-main beam; 11-embedded anchor bolt; 12-steel plate; 13-bridge deck paving steel bar; 14-bolt; 2-continuous bridge section; 21-prefabricated partial bridge deck paving steel bar; 22-anchor bolt hole; 23-waterproof layer; 24-asphalt layer; 25-cut seam. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0034] Example

[0035] like Figure 1-5As shown, this embodiment provides a durable bridge deck continuous structure, including: a main beam 1 and a continuous bridge section 2 arranged above the main beam 1, the continuous bridge section 2 is reserved with a number of prefabricated partial bridge deck paving steel bars 21 connected to the main beam 1 in the horizontal direction, and the lower end face of the continuous bridge section 2 is provided with a number of anchor holes 22 in the vertical direction, the anchor holes 22 are connected to the embedded anchors 11 on the surface of the main beam 1, so that the continuous bridge section 2 is firmly connected to the main beam 1 in the horizontal and longitudinal directions respectively, so that the two are subjected to force together, the entire bridge deck is more stable and firm, and its service life is guaranteed.

[0036] Among them, the surface of the main beam 1 is provided with embedded anchor bolts 11, and the embedded anchor bolts 11 are connected to the prefabricated section through the reserved anchor bolt holes 22 with high-strength cement mortar, which ensures the stability and firmness between the main beam 1 and the continuous bridge section 2, that is, good durability.

[0037] At the same time, studs 14 are welded to the steel plate 12, and the studs 14 are fixedly connected to the continuous bridge section 2. That is, the steel plate 12, the studs 14 and the continuous bridge section 2 are prefabricated together in the factory, and the steel plate 12 and the UHPC concrete are tightly connected together, so that the prefabricated section forms a whole and is jointly subjected to force. Prefabrication in the factory facilitates maintenance, effectively guarantees construction quality, does not restrict each other with other construction processes, and effectively shortens the construction period.

[0038] In this embodiment, the studs 14 and the embedded anchor bolts 11 are spaced apart to avoid interference between the two, thereby ensuring that the continuous bridge section 2 can be normally installed on the main beam 1 for subsequent concrete filling.

[0039] In this embodiment, the steel plate 12 is preferably a 16mmQ345 steel plate 12, which is a low-alloy high-strength structural steel with good weldability, plasticity and reliability. The steel plate 12 also has high strength and corrosion resistance, is suitable for various harsh working environments, has a wide range of applications and is low cost.

[0040] In this embodiment, bridge deck pavement steel bars 13 are respectively provided at both ends of the main beam 1. The bridge deck pavement steel bars 13 are welded to the prefabricated bridge deck pavement steel bars 21. The prefabricated bridge deck pavement steel bars 21 correspond one-to-one to the bridge deck pavement steel bars 13, which reinforce the continuous bridge section 2 in the horizontal direction, further enhance the stability between the main beam 1 and the continuous bridge section 2, and make the entire bridge body more solid.

[0041] In this embodiment, high-strength cement mortar, i.e., concrete, is injected into the anchor hole 22 to connect the main beam 1 and the continuous bridge section 2 and fill it, thereby ensuring a tight connection between the continuous bridge section 2 and the main beam 1, and effectively connecting the continuous bridge section 2 with other parts of the bridge to form a unified whole, which is jointly stressed and convenient to construct.

[0042] In this embodiment, the concrete is preferably UHPC concrete, specifically ultra-high performance concrete, which has ultra-high durability and ultra-high mechanical properties. The mechanical properties are close to those of steel structures and it has good waterproof performance, thereby ensuring the service life of the bridge. It also has excellent wear resistance and explosion resistance, and is suitable for large-span bridges. It can also be used in high-abrasion and high-corrosion environments and has a wide range of applications.

[0043] In this embodiment, the continuous bridge section 2 can be constructed in a factory, which can not only ensure the construction quality but also shorten the construction period. It can also take advantage of the high strength and good durability of UHPC. At the same time, this bridge deck continuity scheme is applicable to various concrete main beams 1, such as common small box beams, T beams, hollow slabs, etc., and has strong applicability.

[0044] In this embodiment, a waterproof layer 23 is laid on the surface of the continuous bridge section 2. The waterproof layer 23 is preferably a 100 cm wide SBS waterproof membrane, which is an excellent waterproof material made of styrene-butadiene-styrene (SBS) thermoplastic elastomer modified asphalt as a coating, glass fiber cloth, polyester cloth, etc. as a matrix, and high-grade wrinkled polyester film as an upper surface material. It has the advantages of heat resistance, cold resistance, corrosion resistance, aging resistance, good thermoplasticity, high tensile strength, high elongation, and strong tear resistance, so that the waterproof layer 23 has a better waterproof effect and a longer service life.

[0045] In this embodiment, the surface of the waterproof layer 23 is paved with an asphalt layer 24. The asphalt pavement is made of a mixture of petroleum asphalt and sand and gravel. It has good softness and elasticity, a flat surface, no joints, comfortable driving, low vibration, low noise, and wear resistance. It can withstand the impact of temperature changes and earthquakes and is not easy to crack or break. In addition, the asphalt pavement is laid quickly, the construction period is short, and the impact on traffic is small. The asphalt pavement has high anti-skid properties, which can reduce the slipping of vehicles on rainy or snowy days and improve driving safety.

[0046] Of course, after the concrete is poured into the anchor hole 22, a sawing operation is performed in the middle of the continuous bridge section 2 to form a cut slit 25 to prevent the concrete pavement from prematurely releasing stress due to temperature and other reasons and causing irregular cracking. Generally, the earlier the cut slit 25 of the concrete pavement is made, the better. However, if it is made too early, the cut slit will easily produce burrs, affecting the service life and appearance, and it will be easy for water and garbage to enter in the future. If it is cut too late, it will increase the difficulty of construction and affect the progress, while increasing the consumption of cutting blades.

[0047] In addition, asphalt paste is filled in the cut slit 25. Due to the shrinkage stress concentration caused by temperature at the cut, cracks will spread deep into the continuous bridge section 2, causing cracks in the continuous bridge section 2. When it rains, rainwater will seep down until it soaks into the roadbed and causes damage. Filling asphalt paste in the cut slit 25 can ensure the service life of the continuous bridge section 2 and play a protective role.

[0048] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A durable continuous bridge deck structure, characterized in that: include: A main beam and a continuous bridge section arranged above the main beam, the continuous bridge section is provided with a number of prefabricated partial bridge deck paving steel bars connected to the main beam in the horizontal direction, and the lower end face of the continuous bridge section is provided with a number of anchor holes in the vertical direction, the anchor holes are connected to the embedded anchors on the surface of the main beam, so that the continuous bridge section is firmly connected to the main beam in both the horizontal and longitudinal directions.

2. The durable continuous bridge deck structure according to claim 1, characterized in that: A steel plate is provided on the surface of the main beam, and the steel plate is welded to the embedded anchor bolts.

3. The durable continuous bridge deck structure according to claim 2, characterized in that: Studs are welded on the steel plates and fixedly connected to the continuous bridge sections.

4. The durable continuous bridge deck structure according to claim 3, characterized in that: The studs are spaced apart from the embedded anchor bolts.

5. The durable continuous bridge deck structure according to claim 1, characterized in that: Bridge deck pavement steel bars are respectively provided at both ends of the main beam, and the bridge deck pavement steel bars are welded to the prefabricated bridge deck pavement steel bars.

6. The durable continuous bridge deck structure according to claim 1, characterized in that: The main beam is connected to the continuous bridge section by injecting high-strength cement mortar into the anchor holes.

7. The durable continuous bridge deck structure according to claim 1, characterized in that: The surface of the continuous bridge section is paved with a waterproof layer.

8. The durable continuous bridge deck structure according to claim 7, characterized in that: An asphalt layer is laid on the surface of the waterproof layer.

9. The durable continuous bridge deck structure according to claim 1, characterized in that: A slit is formed in the middle of the continuous bridge section.

10. The durable continuous bridge deck structure according to claim 9, characterized in that: Asphalt paste is filled into the cut seam.

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