Simply supported beam bridge floor continuous structure

Abstract

The utility model relates to the technical field of bridge engineering, and discloses a simply supported beam bridge floor continuous structure which comprises a prestressed concrete simply supported beam, a preformed groove is formed in a flange plate at the bridge floor continuous end of the prestressed concrete simply supported beam bridge, and a rubber pad or asphalt is flatly laid at the bottom of the preformed groove; stainless steel bars are arranged in the reserved grooves and welded to the reserved longitudinal steel bars of the flange plates of the two adjacent simply supported beams in the front-back direction. The problems that a traditional simply supported beam bridge deck continuous structure is poor in structural performance, prone to cracking and short in service life are solved, and the purposes of restraining cracks, improving the durability of the bridge deck continuous structure and prolonging the overall service life of a bridge are achieved.

Description

Technical Field

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

[0002] In recent years, prestressed concrete T-beams and small box beams have been widely used in engineering. The traditional simple-supported-first-continuous-later structure requires the negative bending moment steel bundles to be tensioned after the beam and slab are erected to form a continuous structure, which leads to cumbersome construction steps, low efficiency, and difficult to control construction quality. In contrast, the continuous simple-supported bridge deck beam omits the pier top concrete and negative bending moment steel bundle processes, which is conducive to reducing construction costs and improving construction efficiency.

[0003] The continuous simply supported beam of the bridge deck has the mechanical characteristics of a simply supported beam bridge, provides a continuous driving lane, improves driving comfort, and has gradually become the mainstream structural form. However, its stress is relatively complex and is affected by multiple factors such as temperature changes, vehicle loads, temperature gradients, and bearing deformation, which may cause cracking, breakage, and other problems, affecting driving safety and comfort. The main reason for this is that there is insufficient understanding of the continuous structural behavior of the bridge deck during design and the structural treatment is simple.

[0004] The reference document CN203546590U discloses a continuous bridge deck structure of a simply supported beam bridge, including a beam body, a continuous bridge deck structural layer and a reinforced concrete pavement layer, and an asphalt concrete pavement layer, which is paved on the top surface of the continuous bridge deck structural layer and the reinforced concrete pavement layer. However, the reference document still has the problems of poor structural performance and short service life.

[0005] Therefore, in order to solve the above-mentioned problem of continuous structure of the bridge deck of a simply supported beam bridge, the utility model proposes a continuous structure of the bridge deck of a simply supported beam. Utility Model Content

[0006] The utility model proposes a continuous structure of a simply supported beam bridge deck, which is suitable for prestressed concrete simply supported T beams and small box beams, comprising: a prestressed concrete simply supported beam, a flange plate at the continuous end of the bridge deck of the prestressed concrete simply supported beam is provided with a reserved groove, and a rubber pad or asphalt is laid flat on the bottom of the reserved groove; stainless steel bars are arranged in the reserved groove at the continuous end of the prestressed concrete simply supported beam bridge deck, and the stainless steel bars are welded to the reserved longitudinal steel bars of the flange plates of the two adjacent spans of the simply supported beams in the front and rear.

[0007] As a preferred method, UHPC is cast in the reserved groove to form a continuous simply supported beam bridge deck. Ultra-high performance concrete is cast in the reserved groove to help improve the compressive strength and durability of the bridge. The excellent performance of UHPC can effectively reduce cracking and improve the overall performance of the structure.

[0008] Thickening the flange plate of the simply supported beam at the preferred reserved groove can increase the strength of the beam, improve the bearing capacity and bending stiffness of the beam, and improve the bridge deck performance; the reserved grooves of the two adjacent spans of simply supported beams are symmetrically arranged along the span line, which helps to balance the structural force, reduce the deformation caused by uneven loads, and improve the stability and reliability of the bridge.

[0009] As a preferred option, stirrups and longitudinal reinforcement of the simply supported beam flange plate are reserved in the reserved groove to improve the shear strength of the inclined section, fix the position of the main reinforcement, strengthen the synergistic effect of the load-bearing main reinforcement and concrete, and increase the overall toughness.

[0010] Preferably, the wet joints on both sides of the reserved groove are cast-in-place with UHPC, and longitudinal steel bars are provided in the wet joints. The longitudinal steel bars are full-length bars, which can effectively avoid the uneven shrinkage and creep of the continuous structure of the bridge deck, reduce the risk of cracks caused by this, and improve the durability of the bridge.

[0011] As a preference, stainless steel bars are used in the reserved slots at the cast-in-place UHPC to provide better corrosion resistance.

[0012] Preferably, the stainless steel bars are longitudinally arranged steel bars.

[0013] Preferably, the stainless steel bars are arranged below the reserved stirrups of the simply supported beam flange plates, and the two ends of the stainless steel bars are welded to the reserved longitudinal steel bars of the two adjacent spans of the simply supported beam flange plates, thereby improving the longitudinal continuity of the steel bars and the protective effect of the concrete cover layer and improving its crack resistance.

[0014] Preferably, a rubber pad is provided in the middle of the bottom of the beam ends of two adjacent front and rear spans of simply supported beams, which helps to mitigate the vibration and shock caused by the impact of the vehicle and improve driving comfort.

[0015] The beneficial effects of the utility model are as follows: Casting UHPC in the reserved groove can effectively improve the structural stress performance, delay the development of displacement and concrete strain, and thus inhibit the development of cracks. The use of stainless steel bars avoids the development of cracks caused by steel bar rust expansion. Laying rubber pads or rubber asphalt at the bottom of the reserved groove can effectively improve the tensile stress distribution of the top surface of the continuous end, delay the appearance of cracks, and improve the durability of the continuous structure of the UHPC bridge deck. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an elevation view of an embodiment of a continuous structure of a simply supported beam bridge deck of the utility model.

[0017] Figure 2 It is a cross-sectional view of an embodiment of a continuous structure of a simply supported beam bridge deck of the utility model.

[0018] Figure 3 It is a plan view of an embodiment of a continuous structure of a simply supported beam bridge deck of the utility model.

[0019] 1-reserved groove, 2-stainless steel bar, 3-UHPC, 4-rubber pad, 5-longitudinal reinforcement, 6-stirrups, 7-wet joint, 8-wet joint longitudinal reinforcement, 9-rubber pad. DETAILED DESCRIPTION

[0020] First embodiment:

[0021] The present application embodiment proposes a continuous structure of a simply supported beam bridge deck, such as Figures 1 to 3 , including a prestressed concrete simply supported beam, the flange plate of the continuous end of the bridge deck of the prestressed concrete simply supported beam is provided with a reserved groove 1, and the bottom of the reserved groove 1 is paved with a rubber pad 4 or asphalt, which can effectively reduce vibration and vibration, improve the comfort of bridge driving, and help reduce the impact on the structure; the prestressed concrete simply supported beam bridge deck is provided with stainless steel bars 2, and the stainless steel bars 2 are welded to the reserved longitudinal steel bars 5 of the flange plates of the two adjacent spans of the simply supported beams. This design enhances the corrosion resistance of the structure, improves the overall crack resistance, and enhances the protective effect of the concrete cover.

[0022] UHPC3, i.e. ultra-high performance concrete, is poured in the reserved groove 1. It has the characteristics of high strength, high toughness and high durability. The continuous simply supported beam bridge deck is composed of UHPC3. The use of ultra-high performance concrete to pour the reserved groove 1 helps to improve the tensile strength and durability of the bridge. The excellent performance of UHPC3 can effectively reduce cracking and improve the overall performance of the structure, thereby improving the performance level of the overall structure.

[0023] Thickening the flange plate of the simply supported beam at the reserved groove 1 can increase the strength of the beam, improve the bearing capacity and bending stiffness of the beam, and improve the bridge deck performance; the reserved grooves 1 of the two adjacent simply supported beams in the front and rear spans are symmetrically arranged along the span line, which helps to balance the structural force, reduce the deformation caused by uneven loads, and improve the stability and reliability of the bridge.

[0024] The reserved groove 1 is used to reserve stirrups 6 and longitudinal steel bars 5 of the flange plate of the simply supported beam, improve the shear strength of the inclined section, fix the position of the main steel bars, strengthen the synergy between the main steel bars and concrete, and increase the overall toughness, which helps to make the bridge more durable and resistant to external forces.

[0025] The wet joints 7 on both sides of the reserved groove 1 are cast-in-place with UHPC. Longitudinal steel bars 5 are arranged in the wet joints 7. The longitudinal steel bars 5 are through-length bars, which can effectively avoid uneven shrinkage and creep of the continuous structure of the bridge deck, reduce the risk of cracks caused thereby, and improve the durability of the bridge.

[0026] The reserved slot 1 uses stainless steel ribs 2 at the cast-in-place UHPC 3 to provide better corrosion resistance.

[0027] The stainless steel bar 2 is a longitudinally arranged steel bar.

[0028] The stainless steel bar 2 is arranged below the reserved stirrups 6 of the simply supported beam flange plate, and the two ends of the stainless steel bar 2 are welded to the reserved longitudinal steel bars of the two adjacent spans of the simply supported beam flange plates, thereby improving the longitudinal continuity of the steel bars and the protective effect of the concrete cover layer, and improving its crack resistance.

[0029] A rubber pad 9 is arranged in the middle of the bottom of the beam end of two adjacent front and rear span simply supported beams, which helps to reduce the vibration and vibration caused by the impact of the vehicle and improve the driving comfort.

[0030] When constructing a continuous structure of a simply supported beam bridge deck, the process is as follows:

[0031] Step 1: When prefabricating the simply supported beam, a reserved groove 1 is set, and stirrups 6 and longitudinal steel bars 5 are arranged on the flange plate.

[0032] Step 2: Place rubber pads 9 in the middle of the bottom of the beam ends of two adjacent spans of simply supported beams to achieve effective buffering and bridge support.

[0033] Step three, lay a rubber mat or rubber asphalt 4 at the bottom of the reserved groove 1 to make the bridge waterproof and moisture-proof.

[0034] Step 4: Place the longitudinal stainless steel reinforcement 2 in the reserved groove 1 and place it below the reserved stirrups 6 of the simply supported beam flange plate to enhance the strength and stability of the structure.

[0035] Step five: placing longitudinal stainless steel ribs 2 in the wet joint 7 to enhance the durability of the connection.

[0036] Step six, weld the two ends of the longitudinal stainless steel bar 2 to the longitudinal steel bars 6 of the flange plates of the front and rear two spans of simply supported beams and the wet joint longitudinal steel bars 8 to increase the firmness of the connection.

[0037] Step seven, UHPC3 is cast in the reserved groove 1 to make the bridge deck of the two adjacent spans of simply supported beams form a continuous bridge deck, thereby improving the bearing capacity of the overall structure.

[0038] Step 8: After UHPC3 reaches the strength requirements, the cast-in-place bridge deck layer and asphalt concrete bridge deck pavement are constructed to increase the smoothness of the bridge surface and enhance its durability.

[0039] Second embodiment:

[0040] This embodiment proposes a bridge using a continuous structure of a simply supported beam bridge deck, the bridge type is a prestressed concrete simply supported beam, and its continuous structure is that the flange plate of the continuous end of the bridge deck of the prestressed concrete simply supported beam is provided with a reserved groove 1, and the bottom of the reserved groove 1 is paved with a rubber pad 4 or asphalt, which can effectively reduce vibration and vibration, improve the comfort of bridge driving, and help reduce the impact on the structure; stainless steel bars 2 are provided in the reserved groove at the continuous end of the prestressed concrete simply supported beam bridge deck, and the stainless steel bars 2 are welded to the reserved longitudinal steel bars 5 of the flange plates of the two adjacent spans of the simply supported beams. This design enhances the corrosion resistance of the structure, improves the overall crack resistance, and enhances the protective effect of the concrete cover layer.

[0041] When constructing a bridge with a continuous simply supported beam deck, the process is as follows:

[0042] Step 1: During the prefabrication stage of the simply supported beam, a reserved groove 1 needs to be set, and stirrups 6 and longitudinal reinforcement 5 are arranged on the flange plate.

[0043] Step 2: Place the rubber pad 9 at the middle position of the bottom of the two adjacent spans of simply supported beams to effectively achieve the buffering and bridge supporting functions.

[0044] Step 3: Lay a rubber mat or rubber asphalt 4 at the bottom of the reserved groove 1 to ensure that the bridge has waterproof and moisture-proof properties.

[0045] Step 4: Place the longitudinal stainless steel reinforcement 2 in the reserved groove 1, and the position should be below the reserved stirrups 6 of the simply supported beam flange plate to enhance the strength and stability of the structure.

[0046] Step 5: Place the longitudinal stainless steel ribs 2 in the wet joint 7 to enhance the durability of the connection.

[0047] Step 6: Weld the two ends of the longitudinal stainless steel bar 2 to the longitudinal steel bars 6 of the flange plates of the front and rear simply supported beams and the wet joint longitudinal steel bars 8 to improve the firmness of the connection.

[0048] Step 7: Perform the cast-in-place process of UHPC3 and fill the reserved groove 1, so that the two adjacent spans of simply supported beams in the front and rear form a continuous structure of the bridge deck, thereby enhancing the bearing capacity of the overall structure.

[0049] Step 8: After UHPC3 reaches the strength requirements, the cast-in-place bridge deck layer and asphalt concrete bridge deck are paved to improve the smoothness and durability of the bridge surface.

[0050] The bridge built according to the above steps is divided into two parts, with a split span line in the middle, which divides the bridge into the front span simple supported beam and the rear span simple supported beam, that is, two adjacent spans of simple supported beams, wherein the reserved groove 1 of the front span simple supported beam is a groove with a length of 140 cm and a depth of 25 cm, which is paved with a rubber pad 4 and cast-in-place UHPC3; the rear span simple supported beam is behind the split span line, and the reserved groove 1 of the rear span simple supported beam is a groove with a length of 140 cm and a depth of 25 cm, which is paved with cast-in-place UHPC3 and asphalt or rubber pad 4, and the stainless steel bars 2 are respectively longitudinally penetrated and buried in the UHPC3, placed under the reserved stirrups 6, and welded with the reserved longitudinal steel bars 5, forming a continuous longitudinal force main reinforcement system. A rubber pad 9 is provided at the lower end of the cross section where the split span line is located, that is, at the bottom of the two front and rear simply supported beam ends.

[0051] A thickened wing section is provided at the continuous end of the simply supported beam deck to make the simply supported beam deck more solid. At the same time, deformation buffering and vibration isolation technology are introduced into the side beams and the middle beams to slow down the structural stress rate, improve the seismic performance of the bridge, and reduce structural damage caused by earthquakes.

[0052] The reserved groove 1 is cast with UHPC3 (ultra-high performance concrete), which has excellent characteristics such as high strength, high toughness, and high durability, forming a continuous simply supported beam bridge deck structure. By using ultra-high performance concrete in the reserved groove 1, the compressive strength and durability of the bridge are effectively improved. The excellent performance of UHPC3 helps to reduce cracking and improve the overall structural performance level.

[0053] For the reserved slot 1, the flange plate of the simply supported beam is thickened to increase the strength of the beam, improve the bearing capacity and bending stiffness, and thus improve the performance of the bridge deck. At the same time, the reserved slots 1 of the two adjacent simply supported beams are symmetrically arranged along the span line, which helps to balance the structural force, reduce the deformation caused by uneven loads, and improve the stability and reliability of the bridge.

[0054] The reserved groove 1 is used to reserve stirrups 6 and longitudinal steel bars 5 of the flange plate of the simply supported beam, which can improve the shear strength of the inclined section, fix the position of the main steel bars, strengthen the synergy between the main steel bars and concrete, and increase the overall toughness. This design helps to improve the durability of the bridge and its resistance to external forces.

[0055] The wet joints 7 on both sides of the reserved groove 1 are cast in place with UHPC, and full-length longitudinal steel bars 5 are arranged in the wet joints 7, which effectively avoid the uneven shrinkage creep caused by the continuous structure of the bridge deck, reduce the risk of cracks, and improve the durability of the bridge.

[0056] The reserved slot 1 uses stainless steel ribs 2 at the cast-in-place UHPC 3 to provide better corrosion resistance.

[0057] The stainless steel bar 2 is a longitudinally arranged steel bar, located below the reserved stirrups of the simply supported beam flange plate, and its two ends are welded to the reserved longitudinal steel bars of the two adjacent simply supported beam flange plates in the front and rear spans, thereby improving the longitudinal continuity of the steel bar and the protective effect of the concrete cover layer, and improving the crack resistance.

[0058] A rubber pad 9 is arranged in the middle of the bottom of the beam end of two adjacent front and rear span simply supported beams, which helps to reduce the vibration and vibration caused by the impact of the vehicle and improve the driving comfort.

[0059] In the embodiments provided in the present invention, it should be understood that the disclosed system and method can also be implemented in other ways. The above described system and method embodiments are merely illustrative.

[0060] In this embodiment, a continuous structure of a simply supported beam bridge deck and a bridge thereof are used. Casting UHPC in the reserved groove can effectively improve the stress performance of the structure, delay the development of displacement and concrete strain, and thus inhibit the development of cracks. The use of stainless steel bars avoids the development of cracks caused by steel bar rust expansion. Laying rubber pads or rubber asphalt at the bottom of the reserved groove can effectively improve the tensile stress distribution on the top surface of the continuous section, delay the appearance of cracks, and improve the durability of the continuous structure of the UHPC bridge deck.

[0061] Obviously, although the embodiments disclosed in the utility model are as above, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments, and are not intended to limit the utility model. Based on the embodiments in the utility model, all other embodiments obtained by any ordinary technician in the field without creative work are within the scope of protection of the utility model.

Claims

1. A simply supported beam bridge deck continuous structure, characterized in that: It comprises a prestressed concrete simply supported beam, wherein the flange plate at the continuous end of the bridge deck of the prestressed concrete simply supported beam is provided with a reserved groove (1), and a rubber pad (4) is laid flat on the bottom of the reserved groove (1); A stainless steel rib (2) is arranged in the reserved groove (1), and the stainless steel rib (2) is welded to the reserved longitudinal steel bars (5) of the flange plates of the two adjacent front and rear spans of the simply supported beam.

2. The continuous structure of simply supported beam bridge deck according to claim 1, characterized in that: UHPC (3) is poured in the reserved groove (1) to form a continuous simply supported beam bridge deck.

3. The continuous structure of simply supported beam bridge deck according to claim 2, characterized in that: The flange plate of the simply supported beam at the reserved groove (1) is thickened, and the reserved grooves (1) of the two adjacent spans of simply supported beams are symmetrically arranged along the span dividing line.

4. The continuous structure of simply supported beam bridge deck according to claim 3, characterized in that: The reserved groove (1) is reserved for stirrups (6) and longitudinal steel bars (5) of the simply supported beam flange plate.

5. A continuous simply supported beam bridge deck structure according to any one of claims 1 to 4, characterized in that: The wet joints (7) on both sides of the reserved groove (1) are cast in situ using UHPC (3), and wet joint longitudinal steel bars (8) are arranged in the wet joints (7), and the wet joint longitudinal steel bars (8) are through-length bars.

6. The continuous structure of simply supported beam bridge deck according to claim 5, characterized in that: The reserved groove (1) uses stainless steel bars (2) at the cast-in-place UHPC (3).

7. The continuous structure of simply supported beam bridge deck according to claim 1, characterized in that: The stainless steel bar (2) is arranged below the reserved stirrups (6) of the simply supported beam flange plate, and the two ends of the stainless steel bar (2) are welded to the reserved longitudinal steel bars (5) of the simply supported beam flange plates of the two adjacent spans.

8. The continuous structure of simply supported beam bridge deck according to claim 1, characterized in that: The stainless steel bars (2) are longitudinally arranged steel bars.

9. The continuous structure of simply supported beam bridge deck according to claim 1, characterized in that: A rubber pad (9) is arranged in the middle of the bottom of the beam ends of the two adjacent spans of the front and rear simply supported beams.

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