Simply supported bridge expanding and widening device
By using a simple-supported bridge expansion and spreading device to set up the first connection part and the second connection part, and using ultra-high performance concrete and reinforced concrete to connect, the problem of cracks easily on the bridge connection surface is solved, and the bridge deck smoothness and driving safety are achieved.
Patent Information
- Application Number
- CN202421925635.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-05-30
- Estimated Expiration
- 2034-08-09
AI Technical Summary
In the existing bridge expansion and width method, cracks are easily generated on the connection surface, which affects driving safety and is inconvenient for later maintenance.
A simple-supported bridge expansion width-shaping device is designed. By setting a first connection and a second connection between the outer side plate of the original bridge and the inner side plate of the new bridge, it is connected by ultra-high performance concrete and reinforced concrete to ensure the smoothness of the bridge deck and the independent stress of the structure.
It effectively avoids cracks in the bridge connection surface, ensures smoothness of the bridge deck and driving safety, and reduces the difficulty of later maintenance.
Smart Images
Figure CN222923630U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of civil engineering, and particularly relates to a simply supported bridge expansion and widening device. Background Technique
[0002] As more and more infrastructure fails to meet the current development needs, more and more bridges need to be expanded and widened.
[0003] At present, there are mainly the following three ways to widen bridges:
[0004] The first connection method is that the upper structures of the new and old bridges are independent, and the lower structures are also independent. The advantage of this connection method is that it does not change the stress condition of the old bridge at all and maintains the original state. The new and old bridges play their respective roles independently. There are still some problems at the bridge joint. The asynchronous deformation of the upper beam slabs will cause the asphalt pavement layer at the connection part to be damaged and form longitudinal cracks. The side beam slabs directly bear the wheel load, with large and unfavorable forces. The materials filled at the joint may come off, and there will be a certain deflection difference between the new and old structures, affecting driving safety. The bridge deck pavement at the joint cracks and it is inconvenient for later maintenance. Using a transverse expansion joint can better solve the deformation difference between the new and old bridges and meet the driving requirements. However, the cost of the transverse expansion joint is relatively high, which is not conducive to large-scale application. At the same time, its later pipe maintenance is more troublesome.
[0005] The second connection method is that the upper structures of the new and old bridges are connected, and the lower structures are independent. This method is a new widening method that adapts to the situation of not interrupting traffic under large traffic volume and can effectively ensure "widening while in traffic". It fully considers the deformation and stiffness coordination of the beams on both sides of the splicing part of the new and old bridges and adopts separation at the lower part. The adjacent beam slabs of the upper structure are rigidly connected. The rigid connection of the upper structure will cause the lateral redistribution of vehicle loads and avoid the appearance of longitudinal joints. The lower structures of the widened bridge and the original bridge do not affect each other, and the internal force influence of the connection of the upper structure on the lower structure is very small. However, the uneven settlement of the lower parts of the new and old bridges will directly affect the stress at the splicing position of the upper structure.
[0006] The third connection method is that the upper and lower structures of the new and old bridges are both connected. This method is not suitable for the bridge widening that does not interrupt traffic under large traffic volume. When connecting, the outer side needs to be closed, affecting traffic. The connection between the widened bridge and the original bridge becomes an integral whole, reducing the excessive deformation generated at the connection of the new and old bridges under various load actions. However, when the settlement of the widened bridge foundation is greater than that of the old bridge, the generated additional internal forces are relatively large, which will cause cracks at the joints of the capping beam, tie beam, etc. in the lower structure, and cracks may also occur at the upper connection. Therefore, it is basically not used at present.
[0007] To avoid the problem of cracks at the bridge connection surface, we propose a simply supported bridge expansion and widening device to solve it. Content of the Utility Model
[0008] The purpose of the present utility model is to provide a simply supported bridge expansion and widening device to solve the above problems.
[0009] To achieve the above purpose, the present utility model provides the following solution:
[0010] A simply supported bridge expansion and widening device includes an outer side plate of the original bridge and an inner side plate of the new bridge. One side at the bottom of the outer side plate of the original bridge and one side at the bottom of the inner side plate of the new bridge are connected by a first connecting part;
[0011] A connecting groove is opened on one side of the original bridge reinforced concrete casting section at the top of the outer side plate of the original bridge near the joint. A splicing groove is provided on one side of the inner side plate of the new bridge at the top near the joint. The groove formed after the connection groove and the splicing groove are spliced is filled with a second connecting part;
[0012] A new bridge casting reinforced concrete casting section is laid on one side of the inner side plate of the new bridge away from the splicing groove. An asphalt concrete bridge deck is laid on the top of the new bridge casting reinforced concrete casting section. The asphalt concrete bridge deck extends towards the outer side plate of the original bridge. After the asphalt concrete bridge deck is laid to the top of the original bridge reinforced concrete casting section, it is spliced with the original concrete pavement.
[0013] Preferably, the first connecting part includes a plurality of implanted steel bars of the outer side plate of the original bridge. The plurality of implanted steel bars of the outer side plate of the original bridge are arranged in a matrix. One end of the implanted steel bars of the outer side plate of the original bridge is embedded in the outer side plate of the original bridge. The other end of the implanted steel bars of the outer side plate of the original bridge is fixedly connected to one end of the embedded steel bars of the inner side plate of the new bridge. The other end of the embedded steel bars of the inner side plate of the new bridge is embedded in the inner side plate of the new bridge;
[0014] Ultra-high performance concrete is filled between the inner side plate of the new bridge and the outer side plate of the original bridge. The ultra-high performance concrete wraps the outside of the plurality of implanted steel bars of the outer side plate of the original bridge and the plurality of embedded steel bars of the inner side plate of the new bridge.
[0015] Preferably, the second connecting part includes ultra-high performance reinforced concrete. The ultra-high performance reinforced concrete is filled in the groove formed by the splicing of the connecting groove and the splicing groove. The two ends of the ultra-high performance reinforced concrete are respectively fixedly connected to the outer side plate of the original bridge and the inner side plate of the new bridge.
[0016] Preferably, the length of the connecting groove is 0.3 - 0.7 m.
[0017] Preferably, the length of the splicing groove is 0.2 - 0.3 m.
[0018] Preferably, a waterproof layer is laid on the asphalt concrete bridge deck.
[0019] Preferably, the length of the ultra-high performance reinforced concrete is 0.5 - 1 m, the transverse width is 3 - 5 m, and the thickness is 0.1 - 0.15 m.
[0020] Compared with the prior art, the utility model has the following advantages and technical effects:
[0021] During use, when the outer side plate of the original bridge needs to be expanded, the inner side plate of the new bridge is spliced on one side of the outer side plate of the original bridge. A first connecting part is used to connect between one side of the bottom of the outer side plate of the original bridge and one side of the bottom of the inner side plate of the new bridge. A connecting groove is opened at the top of the outer side plate of the original bridge, and a splicing groove is opened at the top of the inner side plate of the new bridge. After the connecting groove and the splicing groove are spliced to form a complete groove, the outer side plate of the original bridge and the inner side plate of the new bridge are fixed through a second connecting part. Subsequently, a reinforced concrete pouring section of the new bridge is constructed on the inner side plate of the new bridge. After the construction of the reinforced concrete pouring section of the new bridge is completed, an asphalt concrete bridge deck is laid on its upper part, and the asphalt concrete bridge deck is extended to the upper part of the original reinforced concrete pouring section of the outer side plate of the original bridge and then spliced with the original road surface, thus completing the expansion. By arranging the second connecting part at the top of the outer side plate of the original bridge and the inner side plate of the new bridge, and arranging the first connecting part between the bottom of the outer side plate of the original bridge and the inner side plate of the new bridge, the first connecting part and the second connecting part can make the force transmission between the outer side plate of the original bridge and the inner side plate of the new bridge clear, well disperse the deformation, adapt to the large differential deformation between structures, and maintain the smoothness of the bridge deck. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings:
[0023] Figure 1 It is a schematic structural diagram of the present utility model;
[0024] Figure 2 It is a schematic structural diagram of the second connecting part of the present utility model;
[0025] Figure 3 It is a schematic structural diagram of the first connecting part of the present utility model;
[0026] Figure 4 It is a schematic structural diagram of the steel bar connecting joint of the present utility model;
[0027] Among them, 1. The original bridge outer guardrail; 2. The original bridge reinforced concrete casting section; 3. The original bridge outer side plate; 4. The new bridge inner side plate; 5. Ultra-high performance reinforced concrete; 6. Asphalt concrete bridge deck; 7. The new bridge casting reinforced concrete casting section; 8. The original bridge outer side plate implanted steel bars; 9. Ultra-high performance concrete; 10. The new bridge inner side plate embedded steel bars; 11. Connecting male head; 12. Sleeve; 13. Threaded block; 14. Clamping ring groove; 15. Leakage hole; 16. Docking column; 17. Spring; 18. Trapezoidal card; 19. Connecting female head. Detailed implementation manners
[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
[0029] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific implementation manners.
[0030] Referring to Figures 1 to 3 , the present invention discloses a simply supported bridge expansion and widening device, including the original bridge outer side plate 3 and the new bridge inner side plate 4. One side of the bottom of the original bridge outer side plate 3 and one side of the bottom of the new bridge inner side plate 4 are connected through a first connecting portion;
[0031] A connecting groove is provided on one side of the original bridge reinforced concrete casting section 2 near the joint at the top of the original bridge outer side plate 3. A splicing groove is provided on one side near the joint at the top of the new bridge inner side plate 4. The groove formed after the connection groove and the splicing groove are spliced is filled with a second connecting portion;
[0032] On one side of the top of the new bridge inner side plate 4 away from the splicing groove, a new bridge casting reinforced concrete casting section 7 is laid. An asphalt concrete bridge deck 6 is laid on the top of the new bridge casting reinforced concrete casting section 7. The asphalt concrete bridge deck 6 extends towards the original bridge outer side plate 3. After the asphalt concrete bridge deck 6 is laid to the top of the original bridge reinforced concrete casting section 2, it is spliced with the original concrete road surface.
[0033] When in use, when it is necessary to expand the outer side plate 3 of the original bridge, the inner side plate 4 of the new bridge is spliced on one side of the outer side plate 3 of the original bridge. A first connecting portion is provided between one side of the bottom of the outer side plate 3 of the original bridge and one side of the bottom of the inner side plate 4 of the new bridge. A connecting groove is formed at the top of the outer side plate 3 of the original bridge, and a splicing groove is formed at the top of the inner side plate 4 of the new bridge. After the connecting groove and the splicing groove are spliced to form a complete groove, the outer side plate 3 of the original bridge and the inner side plate 4 of the new bridge are fixed through a second connecting portion. Subsequently, a reinforced concrete casting section 7 of the new bridge is constructed on the inner side plate 4 of the new bridge. After the construction of the reinforced concrete casting section 7 of the new bridge is completed, an asphalt concrete bridge deck 6 is laid on its upper part, and the asphalt concrete bridge deck 6 is extended to the upper part of the original bridge reinforced concrete casting section 2 of the outer side plate 3 of the original bridge and then spliced with the original road surface, and the expansion can be completed. By providing a second connecting portion at the top of the outer side plate 3 of the original bridge and the inner side plate 4 of the new bridge, and providing a first connecting portion between the bottom of the outer side plate 3 of the original bridge and the inner side plate 4 of the new bridge, the first connecting portion and the second connecting portion can make the force transmission between the outer side plate 3 of the original bridge and the inner side plate 4 of the new bridge clear, well disperse the deformation, adapt to the large differential deformation between the structures, and maintain the smoothness of the bridge deck.
[0034] The outer side plate 3 of the original bridge and the inner side plate 4 of the new bridge are arranged in parallel, and the top of the outer side plate 3 of the original bridge and the top of the inner side plate 4 of the new bridge are at the same horizontal height.
[0035] Before construction, it is necessary to remove the original bridge outer guardrail 1 on the outer side plate 3 of the original bridge and remove the reinforced concrete at the upper end of the outer side plate 3 of the original bridge.
[0036] For a further optimized solution, the first connecting portion includes a number of reinforcing bars implanted in the outer side plate of the original bridge 8. The number of reinforcing bars implanted in the outer side plate of the original bridge 8 is arranged in a matrix. One end of the reinforcing bar implanted in the outer side plate of the original bridge 8 is embedded in the outer side plate 3 of the original bridge, and the other end of the reinforcing bar implanted in the outer side plate of the original bridge 8 is fixedly connected to one end of the embedded reinforcing bar of the inner side plate of the new bridge 10. The other end of the embedded reinforcing bar of the inner side plate of the new bridge 10 is embedded in the inner side plate 4 of the new bridge;
[0037] Ultra-high performance concrete 9 is filled between the inner side plate 4 of the new bridge and the outer side plate 3 of the original bridge. The ultra-high performance concrete 9 wraps the outside of a number of reinforcing bars implanted in the outer side plate of the original bridge 8 and a number of embedded reinforcing bars of the inner side plate of the new bridge 10.
[0038] By implanting a number of reinforcing bars 8 for the outer side plate of the original bridge into the side wall of the outer side plate 3 of the original bridge close to the inner side plate 4 of the new bridge, and then aligning and splicing the inner side plate 4 of the new bridge with the outer side plate 3 of the original bridge, the embedded reinforcing bars 10 in the inner side plate 4 of the new bridge pre-buried correspond one by one with the reinforcing bars 8 implanted in the outer side plate of the original bridge. After fixedly connecting the reinforcing bars 8 implanted in the outer side plate of the original bridge and the embedded reinforcing bars 10 in the inner side plate of the new bridge by welding, formwork is set up for the gap between the bottom of the outer side plate 3 of the original bridge and the inner side plate 4 of the new bridge, and ultra-high performance concrete 9 is poured to achieve the fixed connection of the bottom of the outer side plate 3 of the original bridge and the inner side plate 4 of the new bridge.
[0039] In a further optimized solution, the second connecting part includes ultra-high performance reinforced concrete 5, and the ultra-high performance reinforced concrete 5 is filled in the groove formed by splicing the connecting groove and the splicing groove. The two ends of the ultra-high performance reinforced concrete 5 are fixedly connected to the outer side plate 3 of the original bridge and the inner side plate 4 of the new bridge respectively.
[0040] The ultra-high performance reinforced concrete 5 is prepared by first implanting reinforcing bars into the outer side plate 3 of the original bridge and the inner side plate 4 of the new bridge, and then pouring ultra-high performance concrete. The ultra-high performance reinforced concrete 5 is provided with first bent anchor bars and second bent anchor bars. One end of the first bent anchor bar is bent and implanted into the top of the inner side plate 4 of the new bridge, and the other end of the first bent anchor bar is horizontally arranged towards the side of the outer side plate 3 of the original bridge. One end of the second bent anchor bar is bent and implanted into the top of the outer side plate 3 of the original bridge, and the other end of the second bent anchor bar is horizontally arranged towards the side of the inner side plate 4 of the new bridge. Then ultra-high performance concrete is poured and filled in the groove formed by splicing the connecting groove and the splicing groove to complete the fixation of the top of the outer side plate 3 of the original bridge and the inner side plate 4 of the new bridge.
[0041] The asphalt concrete bridge deck 6 is laid on the upper end surfaces of the ultra-high performance reinforced concrete 5, the cast-in-place section of the reinforced concrete of the original bridge 2 and the cast-in-place section of the reinforced concrete of the new bridge 7.
[0042] Through the setting of the ultra-high performance reinforced concrete 5 and the ultra-high performance concrete 9, the outer side plate 3 of the original bridge and the inner side plate 4 of the new bridge are rigidly connected.
[0043] In a further optimized solution, the length of the connecting groove is 0.3 - 0.7 m.
[0044] In a further optimized solution, the length of the splicing groove is 0.2 - 0.3 m.
[0045] In a further optimized solution, a waterproof layer is laid on the asphalt concrete bridge deck 6.
[0046] In a further optimized solution, the length of the ultra-high performance reinforced concrete 5 is 0.5 - 1 m, the transverse width is 3 - 5 m, and the thickness is 0.1 - 0.15 m.
[0047] The construction process of the widened bridge described in the present utility model is as follows:
[0048] Step 1: Demolish the outer guardrail 1 of the original bridge;
[0049] Step 2: Chisel the asphalt concrete and reinforced concrete at the splicing part of the original bridge, chisel out a connection groove of 0.3 - 0.7 m until the outer side plate 3 of the original bridge is exposed;
[0050] Step 3: Pre-bury steel bars at the connection between the new bridge and the original bridge, and leave a splicing groove of 0.2 - 0.3 m on the inner side plate 4 of the new bridge for splicing and pouring ultra-high performance reinforced concrete with the connection groove;
[0051] Step 4: Implant the steel bars for implanting in the outer side plate of the original bridge 8 on the outer side plate 3 of the original bridge, and weld the steel bars for implanting in the outer side plate of the original bridge 8 with the pre-buried steel bars 10 of the inner side plate of the new bridge;
[0052] Step 5: Place the steel bars at the connection and pour ultra-high performance concrete;
[0053] Step 6: Lay asphalt concrete on the upper part of the ultra-high performance reinforced concrete reinforcement connection section as the bridge deck pavement.
[0054] Compared with the prior art, the present utility model has the following advantages and beneficial effects:
[0055] The present utility model connects the new and old bridges by designing an ultra-high performance concrete connection section, ensuring the continuity of the bridge deck. Moreover, the new and old structures are independently stressed, which can adapt to large differential deformations between the structures and maintain the smoothness of the bridge deck.
[0056] The present utility model utilizes the ultra-high bearing capacity and stiffness of ultra-high performance concrete to improve the strength of the connection between the new and old bridges, and solves the problem of cracks occurring on the connection surface due to insufficient bearing capacity at the connection in traditional connections.
[0057] Embodiment 2:
[0058] Reference Figure 4, the difference between this embodiment and Embodiment 1 is that the reinforcing bars 8 implanted in the outer side plate of the original bridge and the embedded reinforcing bars 10 in the inner side plate of the new bridge are fixedly connected through a reinforcing bar connection joint. The reinforcing bar connection joint includes a connecting male head 11. One end of the connecting male head 11 is axially connected to the reinforcing bar 8 implanted in the outer side plate of the original bridge, and the other end of the connecting male head 11 is axially connected to a docking column 16. A screw sleeve 12 is sleeved outside the connecting male head 11, and the screw sleeve 12 is movably connected to the connecting male head 11. A threaded block 13 is threadedly connected to the inner side of the screw sleeve 12. A groove is formed in the threaded block 13. The docking column 16 extends into the groove. Trapezoidal cards 18 are circumferentially and equally spaced on the docking column 16. The trapezoidal cards 18 are radially slidably connected to the docking column 16. A spring 17 is provided between the trapezoidal cards 18 and the docking column 16. One end of the spring 17 is fixedly connected to the trapezoidal card 18, and the other end of the spring 17 is fixedly connected to the docking column 16. A plurality of trapezoidal cards 18 are in limiting cooperation with a clamping ring groove 14. The clamping ring groove 14 is opened on the side of the groove away from the connecting male head 11. A plurality of leakage holes 15 are circumferentially and equally spaced in the clamping ring groove 14. The number of leakage holes 15 matches the number of trapezoidal cards 18, and the leakage holes 15 correspond to the trapezoidal cards 18 one by one. A connecting female head 19 is axially connected to the end of the threaded block 13 away from the connecting male head 11, and the connecting female head 19 is fixedly connected to the end of the embedded reinforcing bar 10 in the inner side plate of the new bridge.
[0059] During use, through friction welding, the connecting male head 11 is axially connected to the reinforcing bar 8 implanted in the outer side plate of the original bridge, and the connecting female head 19 is axially connected to the embedded reinforcing bar 10 in the inner side plate of the new bridge. After the docking column 16 extends into the groove, initially under the action of the inclined surface of the trapezoidal card 18, the trapezoidal card 18 presses the corresponding spring 17. As the trapezoidal card 18 moves into the clamping ring groove 14, the spring 17 returns to its initial length, causing the trapezoidal card 18 to protrude. Under the limiting cooperation of the trapezoidal card 18 and the clamping ring groove 14, the docking column 16 is clamped with the threaded block 13. Subsequently, the screw sleeve 12 is rotated to be threadedly fixed to the threaded block 13, and the rapid docking and fixation of the reinforcing bar 8 implanted in the outer side plate of the original bridge and the embedded reinforcing bar 10 in the inner side plate of the new bridge can be completed.
[0060] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.
[0061] The embodiments described above are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention shall fall within the protection scope determined by the claims of the present invention.
Claims
1. A device for widening a simply supported bridge, comprising an outer side plate (3) of an original bridge and an inner side plate (4) of a new bridge, characterized in that: The bottom side of the outer side plate (3) of the original bridge and the bottom side of the inner side plate (4) of the new bridge are connected via a first connecting portion; A connection groove is provided on one side of the original bridge reinforced concrete casting section (2) near the joint at the top of the original bridge outer side plate (3), and a splicing groove is provided on one side of the new bridge inner side plate (4) near the joint, and a second connection portion is filled in the groove formed by splicing the connection groove and the splicing groove; A new bridge reinforced concrete casting section (7) is paved on the top of the new bridge inner side plate (4) away from the splicing groove, and an asphalt concrete bridge deck (6) is paved on the top of the new bridge reinforced concrete casting section (7). The asphalt concrete bridge deck (6) extends to the side of the original bridge outer side plate (3). After the asphalt concrete bridge deck (6) is paved to the top of the original bridge reinforced concrete casting section (2), it is spliced with the original concrete road surface.
2. The device for expanding and widening a simply supported bridge according to claim 1, characterized in that: The first connection portion comprises a plurality of original bridge outer side plate embedded steel bars (8), the plurality of original bridge outer side plate embedded steel bars (8) are arranged in a matrix, one end of the original bridge outer side plate embedded steel bars (8) is embedded in the original bridge outer side plate (3), the other end of the original bridge outer side plate embedded steel bars (8) is fixedly connected to one end of the new bridge inner side plate embedded steel bars (10), the other end of the new bridge inner side plate embedded steel bars (10) is embedded in the new bridge inner side plate (4); Ultra-high performance concrete (9) is filled between the inner side plate (4) of the new bridge and the outer side plate (3) of the original bridge, and the ultra-high performance concrete (9) is wrapped around the outer sides of a number of embedded steel bars (8) of the outer side plates of the original bridge and a number of embedded steel bars (10) of the inner side plates of the new bridge.
3. The device for expanding and widening a simply supported bridge according to claim 1, characterized in that: The second connection part comprises ultra-high performance reinforced concrete (5), wherein the ultra-high performance reinforced concrete (5) is filled in a groove formed by splicing the connection groove and the splicing groove, and the two ends of the ultra-high performance reinforced concrete (5) are respectively fixedly connected to the outer side plate (3) of the original bridge and the inner side plate (4) of the new bridge.
4. The device for expanding and widening a simply supported bridge according to claim 1, characterized in that: The length of the connecting groove is 0.3-0.7 m.
5. The device for expanding and widening a simply supported bridge according to claim 1, characterized in that: The length of the splicing groove is 0.2 to 0.3 m.
6. The device for expanding and widening a simply supported bridge according to claim 1, characterized in that: A waterproof layer is laid on the asphalt concrete bridge deck (6).
7. The device for expanding and widening a simply supported bridge according to claim 3, characterized in that: The ultra-high performance reinforced concrete (5) has a length of 0.5 to 1 m, a transverse width of 3 to 5 m, and a thickness of 0.1 to 0.15 m.