Transverse splicing structure of plate girder bridge

Abstract

The utility model provides a transverse splicing structure of a plate girder bridge, and belongs to the technical field of bridges. The transverse splicing structure comprises the buffer piece and the two connecting plates, the two connecting plates are fixedly arranged on the two sides of the buffer piece, and the two connecting plates are fixedly connected with the new bridge and the old bridge respectively; when a new bridge has vertical foundation settlement in the later use process, a connecting plate on the new bridge settles along with a bridge body of the new bridge, then a height difference is generated between the connecting plate on the new bridge and a connecting plate on an old bridge, the two connecting plates are connected through a buffer part, and therefore when settlement occurs, the buffer part is stretched by external force, and the connecting plate on the old bridge is prevented from falling off. Due to the fact that the buffering pieces have certain deformation and rigidity, connection between the new bridge and the old bridge is not affected, and the technical problem that in the prior art, in the vertical foundation settlement process of the new bridge in the later period, the connecting position is torn, and consequently a bridge body is damaged is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to bridge technical field, and specifically relates to a transverse splicing structure of plate girder bridge. BACKGROUND

[0002] In the bridge reconstruction and expansion project, the connection design of new and old bridges is crucial to the structural performance and service life, and one of the most critical challenges is the transverse connection technology of new and old bridges (splicing along the longitudinal joint).

[0003] The new concrete hollow plate girder bridge will produce significant transverse and longitudinal deformation in the later construction stage due to material shrinkage and creep, while the material deformation of the old bridge has basically been completed. This deformation causes unevenness in the stress of the new and old bridges, which may lead to a significant increase in the horizontal deformation of the beam end at the splicing part. The post-construction vertical foundation settlement of the new bridge will cause stress concentration at the joint part, and if the settlement difference exceeds the critical value, it will lead to joint cracking, uneven bridge deck and other problems. In addition, the mismatch of stiffness between the new bridge and the old bridge will lead to uneven stress, and the connection stiffness may be too large to limit the normal deformation of the spliced bridge, thereby causing excessive secondary stress in the structure. If the stiffness at the splicing part is too small, the load may not be effectively transmitted, causing local damage at the joint.

[0004] In the prior art, when the new bridge is overlapped with the old bridge, the web connection position usually uses a rigid connecting piece to be anchored on the new bridge and the old bridge respectively, which will cause tearing at the connection part during the post-construction vertical foundation settlement process of the new bridge, leading to damage of the bridge body and further causing safety hazards, affecting the service life of the new bridge. UTILITY MODEL CONTENTS

[0005] The utility model embodiment provides a transverse splicing structure of plate girder bridge, which aims to solve the technical problem of tearing at the connection part during the post-construction vertical foundation settlement process of the new bridge in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model adopts the technical scheme of providing a transverse splicing structure of plate girder bridge, which comprises a buffer piece and two connecting plates, the two connecting plates are fixed on the two sides of the buffer piece, and the two connecting plates are fixedly connected with the new bridge and the old bridge respectively.

[0007] In a possible implementation manner, the cross section of the buffer piece is a honeycomb structure.

[0008] In a possible implementation manner, a plurality of transverse connection steels are arranged on the side wall of the new bridge, and a plurality of transverse steels are arranged on the side wall of the old bridge; wherein the connecting plate is fixedly connected with the transverse connection steels or the transverse steels.

[0009] In a possible implementation, a plurality of through holes are arranged on the connecting plate, and the through holes are used to accommodate the transverse steel bars or the transverse connecting steel bars.

[0010] In a possible implementation, a plurality of deep holes are arranged on the old bridge, and the deep holes are used to accommodate the transverse steel bars.

[0011] In a possible implementation, the transverse steel bars are connected with the hole walls of the deep holes through the adhesive.

[0012] In a possible implementation, the adhesive is epoxy resin glue.

[0013] In a possible implementation, the connecting plate and the transverse steel bars or the transverse connecting steel bars are connected in a welding manner.

[0014] In a possible implementation, the structure further comprises a first structural member, a second structural member and an elastic member; the first structural member is a plate structure, one end of the first structural member is provided with a groove, and the other end of the first structural member is connected with the old bridge; one end of the second structural member is provided with an extension, and the other end of the second structural member is connected with the new bridge; the extension is slidably arranged in the groove along the width direction of the first structural member; the elastic member is arranged in the groove, one end of the elastic member is fixedly connected with the side wall of the groove, and the other end of the elastic member is fixedly connected with the extension.

[0015] When the new bridge releases stress, the stress is conducted from the second structural member to the elastic member through the extension, and then conducted to the first structural member through the elastic member; the elastic member plays a role of pulling and buffering while ensuring the continuity of force conduction.

[0016] In a possible implementation, the bottom of the first structural member and the bottom of the second structural member are both provided with a hinged support.

[0017] Compared with the prior art, the transverse splicing structure of the plate girder bridge provided in the embodiment comprises a buffer member and two connecting plates, the two connecting plates are fixedly arranged on the two sides of the buffer member, and the two connecting plates are fixedly connected with the new bridge and the old bridge respectively; when vertical foundation settlement occurs in the new bridge in the later use process, the connecting plate on the new bridge will sink with the bridge body of the new bridge, and then a height difference will be caused between the connecting plate on the new bridge and the connecting plate on the old bridge; since the two connecting plates are connected through the buffer member, when the settlement occurs, the buffer member is stretched by external force, and the buffer member has a certain deformation and rigidity, so that the connection between the new bridge and the old bridge is not affected, thereby solving the technical problem that the connection is torn to cause damage to the bridge body in the process of vertical foundation settlement of the new bridge in the later period in the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A structure schematic view of a transverse splicing structure of a plate girder bridge provided by the embodiment of the present application;

[0019] Figure 2 A connection structure schematic view of the buffer member and the two connecting plates;

[0020] Figure 3 A connection structure schematic view of the transverse splicing structure, the connection unit and the new bridge and the old bridge;

[0021] Figure 4 A structure schematic view of a first structural member provided by the embodiment of the present application;

[0022] Figure 5 A structure schematic view of a second structural member provided by the embodiment of the present application;

[0023] Figure 6 A Figure 3 A local enlarged view of the region A;

[0024] BRIEF DESCRIPTION OF DRAWINGS

[0025] 10, old bridge; 20, new bridge; 11, first structural member; 110, groove; 12, hinged support; 13, elastic concrete; 14, asphalt pavement; 21, second structural member; 210, extension; 31, elastic member; 101, transverse steel bar; 201, transverse connecting steel bar; 104, first gap; 105, second gap; 40, connection unit; 41, connecting plate; 42, honeycomb plate. DETAILED DESCRIPTION

[0026] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clear and understandable, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0027] It should be further explained that the drawings and embodiments of the present application mainly describe and explain the concept of the present application, and on the basis of the concept, the specific forms and settings of some connection relationships, position relationships, power mechanisms, power supply systems, hydraulic systems and control systems may not be completely described, but the skilled in the art can realize the above-mentioned specific forms and settings in a well-known manner on the premise of understanding the concept of the present application.

[0028] When a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0029] The terms “length,” “width,” “up,” “down,” “front,” “back,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "multiple" means two or more, and "several" means one or more, unless otherwise explicitly specified.

[0031] Please refer to the following: Figure 1 and Figure 2 The present invention will now describe a transverse splicing structure for a slab beam bridge.

[0032] A transverse splicing structure for a slab bridge includes a buffer member and two connecting plates 41. The two connecting plates 41 are fixed on both sides of the buffer member and are respectively fixedly connected to the new bridge 20 and the old bridge 10.

[0033] This embodiment provides a transverse splicing structure for a slab bridge. Compared with the prior art, the transverse splicing structure includes a buffer and two connecting plates 41. The two connecting plates 41 are fixed on both sides of the buffer and are respectively fixedly connected to the new bridge 20 and the old bridge 10. When the vertical foundation of the new bridge 20 settles during its later use, the connecting plates 41 on the new bridge 20 will settle along with the bridge body of the new bridge 20, resulting in a height difference between the connecting plates 41 on the new bridge 20 and the connecting plates 41 on the old bridge 10. Since the two connecting plates 41 are connected by a buffer, when settlement occurs, the buffer is stretched by external force. Because the buffer has a certain deformation and stiffness, it does not affect the connection between the new bridge 20 and the old bridge 10, thus solving the technical problem in the prior art where the connection is torn and the bridge body is damaged during the later vertical foundation settlement process of the new bridge 20.

[0034] Further, the cross section of the buffer is a honeycomb structure. The buffer adopts the honeycomb structure, which can have certain ductility while ensuring rigidity, prevent the buffer from being torn when the connecting plates 41 on the new bridge 20 and the connecting plates 41 on the old bridge 10 are displaced up and down during the settlement of the new bridge 20, and also has certain rigidity, effectively conducting the force on the new bridge 20 to the old bridge 10 to avoid stress concentration.

[0035] The honeycomb structure has the following advantages:

[0036] Strong bearing capacity: The honeycomb structure can disperse and bear external forces from all directions, making the structure much more resistant to extrusion than any circular or square structure.

[0037] Sophisticated structure: The honeycomb structure of bees is very sophisticated, with the bottom of the cell composed of three identical rhombuses, adjacent cells sharing a wall and a cell bottom, which is very economical in construction materials.

[0038] Material saving: The honeycomb structure uses less material while maintaining strength, with high economic benefits.

[0039] Lightweight and high strength: The honeycomb panel 42 adopts a honeycomb structure, which has low density and excellent strength.

[0040] Good thermal insulation performance: The honeycomb structure of the honeycomb panel 42 forms a large number of air compartments, effectively blocking heat conduction, and has good thermal insulation performance.

[0041] Good energy absorption performance: The structure of the honeycomb panel 42 makes it have good energy absorption capacity, which can absorb energy when impacted or extruded, reducing damage and destruction.

[0042] Good acoustic performance: The honeycomb structure of the honeycomb panel 42 can effectively absorb sound waves, reducing noise propagation and reflection.

[0043] Please refer to Figure 3 and Figure 4 , a transverse splicing structure of a plate girder bridge includes a first structural member 11, a second structural member 21, and an elastic member 31. The first structural member 11 is a plate structure, one end of the first structural member 11 is provided with a groove 110, and the other end of the first structural member 11 is connected with the old bridge 10; one end of the second structural member 21 is provided with an extension 210, the other end of the second structural member 21 is connected with the new bridge 20, and the extension 210 is slidingly embedded in the groove 110 along the width direction of the first structural member 11; the elastic member 31 is arranged in the groove 110, one end of the elastic member 31 is fixedly connected with the side wall of the groove 110, and the other end of the elastic member 31 is fixedly connected with the extension 210;

[0044] When the new bridge 20 releases stress, the stress is conducted from the second structural member 21 to the elastic member 31 through the extension 210, and then is conducted from the elastic member 31 to the first structural member 11, and the elastic member 31 plays a role of connecting and buffering while ensuring the continuity of force conduction.

[0045] Compared with the prior art, the transverse splicing structure of the plate girder bridge provided in the embodiment has the following advantages: the first structural member 11 is connected with the old bridge 10, the second structural member 21 is connected with the new bridge 20, the extension 210 of the second structural member 21 is slidingly embedded in the groove 110, and the elastic member 31 is arranged in the groove 110 and connected with the side wall of the groove 110 at one end and connected with the extension 210 at the other end, so that when the new bridge 20 settles, the stress released in the settlement process is conducted from the second structural member 21 to the elastic member 31 through the extension 210, and then is conducted from the elastic member 31 to the first structural member 11. In this process, the arrangement of the elastic member 31 can avoid the technical problem that the connection stiffness between the new bridge 20 and the old bridge 10 is too large when the new bridge 20 is connected with the old bridge 10 in a conventional rigid connection manner, thereby limiting the normal settlement of the new bridge 20 and causing excessive secondary stress in the structure. In addition, the elastic member 31 plays a role of connecting and buffering while ensuring the continuity of force conduction, can bear and consume the additional internal force caused by the deformation difference, thereby relieving the damage of stress concentration to the structure, and solves the technical problem of stress concentration between the new bridge 20 and the old bridge 10 when the new bridge 20 is spliced with the old bridge 10 in the prior art.

[0046] In some embodiments, referring to Figure 3 The bottom of the first structural member 11 and the bottom of the second structural member 21 are both provided with a hinged support 12, and the top of the hinged support 12 is rotationally connected with the bottom of the first structural member 11 or the bottom of the second structural member 21.

[0047] The arrangement of the hinged support 12 can transmit the load on the road surface to the bridge body of the old bridge 10 and the bridge body of the new bridge 20 through the hinged support 12, and the arrangement of the hinged support 12 can make the first structural member 11 and the second structural member 21 more adaptable to the deformation caused by factors such as load and temperature change, and can resist the structure translation caused by factors such as wind and earthquake wave to a certain extent, so as to ensure the overall safety and stability of the bridge.

[0048] Specifically, the hinged support 12 is a plurality of hinged supports 12, and the hinged supports 12 are arranged at intervals along the longitudinal direction (the length direction) of the bridge. The arrangement of the plurality of hinged supports 12 can better ensure that the force conduction during the release of the bridge is smoother.

[0049] The articulated support 12 can reliably transmit the load and deformation of the superstructure to the substructure, and when the new bridge 20 deforms due to stress release, the articulated support 12 can drive the top transverse splicing structure to adaptively deflect, thereby ensuring the continuity and smoothness of the connection between the new bridge 20 and the old bridge 10.

[0050] Please refer to Figure 6 Specifically, the elastic member 31 is a spring. In the present application, the elastic member 31 is a spring. When the new bridge 20 releases stress, the stress is conducted to the spring through the extension part 210 in the second structural member 21, and then conducted to the first structural member 11 through the spring, and the spring absorbs energy; and the spring connects the first structural member 11 and the second structural member 21 together to ensure the continuity in the force transmission process.

[0051] Please refer to Figure 4 and Figure 5 On the basis of the above embodiment, specifically, the first structural member 11 has a concave cross section, and the second structural member 21 has a convex cross section. The first structural member 11 has a concave cross section, and the second structural member 21 has a convex cross section. The first structural member 11 and the second structural member 21 are integrally and slidably embedded, and the articulated support 12 is arranged between the first structural member 11 and the old bridge 10. The bottom of the first structural member 11 is rotationally connected with the articulated support 12, and the articulated support 12 is fixedly connected with the old bridge 10. The articulated support 12 is arranged between the first structural member 11 and the old bridge 10. The bottom of the first structural member 11 is rotationally connected with the articulated support 12, and the articulated support 12 is fixedly connected with the old bridge 10. Therefore, the specific structural arrangement of the first structural member 11 and the second structural member 21 can avoid the misalignment of the upper plane of the first structural member 11 and the upper plane of the second structural member 21, thereby preventing the new bridge 20 from sinking during the stress release process, which causes the height difference between the new bridge 20 and the old bridge 10, thereby causing the unevenness of the road surface.

[0052] Based on the same utility model concept, the embodiment of the present application also provides a construction method for transverse splicing of a plate girder bridge, comprising the following steps:

[0053] Step S1, obtaining the superstructure parameters of the new bridge 20 and the old bridge 10, the splicing joint parameter size, and the axial stiffness parameter of the articulated support 12; according to the obtained superstructure parameters of the new bridge 20 and the old bridge 10, the arrangement spacing and position of the splicing structure on the upper surface of the new bridge 20 and the old bridge 10 are calculated respectively;

[0054] Step S2, the old bridge 10 is broken, cleaning out to accommodate the splicing structure and the bearing surface of the hinged support 12; the old bridge 10 is implanted with transverse steel bars 101; when the hollow slab beam of the new bridge 20 is prefabricated, the transverse connecting steel bars 201 are arranged on the new bridge 20;

[0055] Step S3, the two ends of the splicing structure are arranged on the bearing surface of the old bridge 10 and the deck of the new bridge 20 respectively, the bearing surface is provided with the hinged support 12 and the first structural member 11, the end of the first structural member 11 is provided with the first gap 104 with the road surface of the old bridge 10; the deck of the new bridge 20 is provided with the hinged support 12 and the second structural member 21, the end of the second structural member 21 is provided with the second gap 105 with the road surface of the new bridge 20; the first gap 104 and the second gap 105 are filled with elastic concrete 13; the two ends of the connecting unit 40 are fixedly connected with the transverse steel bars 101 and the transverse connecting steel bars 201 respectively;

[0056] Step S4, asphalt pavement 14 is paved.

[0057] After the new bridge 20 is connected with the old bridge 10 through the splicing structure and the connecting unit 40, when the new bridge 20 settles, due to the arrangement of the hinged support 12, the first structural member 11 and the second structural member 21 can rotate around the hinged support 12, so that the new bridge 20 and the old bridge 10 are smoothly connected, and the top of the first structural member 11 and the second structural member 21 is paved with asphalt pavement 14, because the asphalt pavement 14 has a certain ductility (i.e. the ability of asphalt material to extend without breaking. This feature is very important for asphalt pavement 14, because it directly affects the stability and durability of the road. The asphalt pavement 14 with good ductility can produce a certain deformation under the action of temperature change and traffic load, thereby reducing the occurrence of diseases such as cracks and ruts).

[0058] The elastic concrete 13 in step S3 is a special concrete material with good elasticity and adaptability, which is suitable for various projects requiring high elasticity and crack resistance.

[0059] The elastic concrete 13 in step S3 is a special concrete material with good elasticity and adaptability, which is suitable for various projects requiring high elasticity and crack resistance.

[0060] Specifically, the connecting unit 40 involved in step S3 includes a honeycomb plate 42 and two connecting plates 41, the two connecting plates 41 are fixedly arranged on the two sides of the honeycomb plate 42 respectively, and the two connecting plates 41 are fixedly connected with the transverse steel bars 101 and the transverse connecting steel bars 201 respectively.

[0061] Further, in order to ensure the connection strength of the connecting plate 41 and the transverse steel bars 101 and the connection strength of the connecting plate 41 and the transverse connecting steel bars 201, a plurality of through holes are formed on the connecting plate 41, and the positions of the through holes are matched with the arrangement of the transverse steel bars 101 or the transverse connecting steel bars 201.

[0062] Specifically, the connecting plate 41 and the transverse steel bars 101 and the connecting plate 41 and the transverse connecting steel bars 201 are connected by welding.

[0063] Further, since the transverse steel bars 101 are embedded in the old bridge 10 through deep holes in the old bridge 10 and the transverse connecting steel bars 201 are pre-embedded in the bridge body of the new bridge 20, in order to facilitate on-site installation and ensure the stability of the connection, the connecting plate 41 and the transverse steel bars 101 or the transverse connecting steel bars 201 are welded by welding process to form an integral whole.

[0064] The arrangement of the honeycomb plate 42 can ensure the continuity of force transmission during the connection process between the new bridge 20 and the old bridge 10, and can also ensure the honeycomb plate 42 when the new bridge 20 and the old bridge 10 have a large offset displacement.

[0065] In step S2, when the old bridge 10 is implanted with the transverse steel bars 101, the gap between the transverse steel bars 101 and the bridge body of the old bridge 10 is filled with adhesive.

[0066] Specifically, the adhesive is epoxy resin glue.

[0067] In summary, the construction method has the following advantages and positive effects:

[0068] The lightweight, excellent flexibility and energy absorption capacity of the honeycomb plate 42 reduce the additional load on the bridge joint seam part, thereby reducing the additional internal force caused by the uneven settlement difference of the new bridge 20 and the old bridge 10. The excellent bending stiffness and load-bearing capacity of the honeycomb plate 42 in the transverse joint seam can improve the overall stiffness and strength of the joint area, and ensure the reliability of the structure under dynamic load or eccentric load. The customizable design of the honeycomb plate 42 makes the installation in the joint seam more convenient, can be well combined with concrete or other joint materials, improves the construction efficiency, and shortens the construction period.

[0069] The honeycomb plate 42 and the joint structure are arranged together, and the unique honeycomb structure and the length adjustment structure of the joint mechanism can disperse the concentrated action of dynamic load and temperature stress, especially at the bridge transverse joint seam, which can reduce fatigue stress and live load impact stress, thereby prolonging the service life of the joint and the whole bridge.

[0070] The high toughness and excellent crack resistance and deformation adaptation capability of the elastic concrete 13 can effectively cope with uneven settlement difference at the transverse joint and additional internal force caused by live load eccentricity, and simultaneously reduce the risk of crack propagation through high-efficiency energy dissipation performance.

[0071] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A transverse splicing structure for a slab girder bridge, characterized in that, It includes a buffer component and two connecting plates, the two connecting plates being fixedly mounted on both sides of the buffer component, and the two connecting plates being fixedly connected to the new bridge and the old bridge respectively.

2. The transverse splicing structure of a slab girder bridge as described in claim 1, characterized in that, The cross-section of the buffer component has a honeycomb structure.

3. The transverse splicing structure of a slab girder bridge as described in claim 2, characterized in that, The new bridge has multiple transverse connecting steel bars on its side wall, and the old bridge has multiple transverse steel bars on its side wall; wherein the connecting plate is fixedly connected to the transverse connecting steel bars or transverse steel bars.

4. The transverse splicing structure of a slab girder bridge as described in claim 3, characterized in that, The connecting plate is provided with multiple through holes, which are used to accommodate the transverse reinforcing bars or transverse connecting reinforcing bars.

5. The transverse splicing structure of a slab girder bridge as described in claim 4, characterized in that, The old bridge has multiple deep holes for accommodating the transverse reinforcing bars.

6. The transverse splicing structure of a slab girder bridge as described in claim 5, characterized in that, The transverse reinforcing bars are connected to the hole wall of the deep hole by an adhesive.

7. The transverse splicing structure of a slab girder bridge as described in claim 6, characterized in that, The adhesive is an epoxy resin adhesive.

8. The transverse splicing structure of a slab girder bridge as described in claim 4, characterized in that, The connection between the connecting plate and the transverse reinforcing bar or the transverse connecting reinforcing bar is by welding.

9. The transverse splicing structure of a slab girder bridge as described in claim 8, characterized in that, It also includes a first structural component, a second structural component, and an elastic component; the first structural component is a plate-shaped structure, with a groove at one end and the other end connected to the old bridge; the second structural component has an extension at one end and the other end connected to the new bridge, the extension being slidably embedded in the groove along the width direction of the first structural component; the elastic component is disposed in the groove, with one end fixedly connected to the side wall of the groove and the other end fixedly connected to the extension; When the new bridge releases stress, the stress is transmitted from the second structural member to the elastic member through the extension, and then transmitted to the first structural member through the elastic member. The elastic member acts as a tension buffer while ensuring the continuity of force transmission.

10. The transverse splicing structure of a slab girder bridge as described in claim 9, characterized in that, Both the first structural component and the second structural component have hinged supports at their bottoms.

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