Horizontal energy consumption connecting device between new bridge body and old bridge body

Abstract

The utility model discloses a horizontal energy consumption connecting device between a new bridge body and an old bridge body. The horizontal energy consumption connecting device comprises a bridge seam shielding unit and a bridge seam energy consumption connecting unit. The two sides of the bridge seam shielding unit are fixedly connected to the bridge surfaces of the newly-built bridge body and the original bridge body respectively, and the lower portion of the bridge seam shielding unit moves upwards to restrain the bridge seam energy consumption connecting unit. The number of the bridge seam energy consumption connecting units is multiple, the two sides of each bridge seam energy consumption connecting unit are fixedly connected to the opposite side walls of the newly-built bridge body and the original bridge body respectively, and kinetic energy generated when the newly-built bridge body and the original bridge body move relatively is consumed through deformation of the bridge seam energy consumption connecting units. According to the device, rigid connection is achieved through flexible connection, and the flexible connection can counteract vertical shearing force caused by differential settlement of a foundation, so that development of longitudinal cracks of a pavement is restrained, the service life of a new bridge is prolonged, and the later maintenance cost is reduced; most of energy generated by external force can be counteracted, so that the service life of the expanded and reconstructed bridge is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to a horizontal energy-consuming connection device between a new and an old bridge body. Background Art

[0002] With the rapid development of my country's economic construction, the demand for traffic volume continues to increase. Many bridges have problems such as low design load, long bridge age, insufficient bridge deck width and gradually saturated traffic capacity. At this time, bridge widening must be used to solve the problem.

[0003] The connection between the new and old bridge bodies will be continuously affected by vehicle loads during use, and will be deformed by vertical shear and lateral tensile forces, and the uneven settlement between the new and old bridges will also affect the connection. There are currently two widely used connection methods: strong connection: chiseling off the edge of the old bridge body, implanting steel bars and pouring concrete to connect the new and old bridge bodies. This connection method is that the new and old bridge bodies are jointly stressed, and it is necessary to coordinate the uneven deformation of the new and old bridges under various horizontal and vertical loads. The connection nodes are subjected to complex forces, which will produce bending moments, shear forces, and axial forces. When subjected to uneven settlement, the rigidity of the connection is too large, which will cause the development of longitudinal cracks at the connection. However, it has good integrity due to its high rigidity; weak connection: a flexible connection is used between the new and old bridge bodies. The connection device does not participate in or partially participates in the coordinated stress of the new and old bridge bodies. The internal force generated by the new and old bridge bodies is effectively absorbed through the connection device, consuming the energy caused by vehicle loads, reducing the generation of longitudinal cracks, and improving the integrity of the new and old bridge bodies through flexible connections. However, flexible connection devices are relatively rare at present.

[0004] Chinese patent CN 111441263 A discloses a method for widening a rigid connection between an old and new bridge to maintain traffic operation. Under the premise of not interrupting traffic operation, the flanges of the upper structures of the new and old bridges are first connected by gluing steel plates, so that the upper structures of the new and old bridges are subjected to force together. Under the action of the live load of the vehicle, the vibration force and vibration frequency generated by the new and old bridges are basically consistent, so that the concrete of the subsequent diaphragm construction of the upper structures of the new and old bridges will not be stretched or squeezed, thereby ensuring the concrete quality of the diaphragm at the connection part of the upper structures of the new and old bridges, and also ensuring that the quality of the embedded reinforcement of the diaphragm is not affected; in addition, the compressive strength and bending and shearing strength of the entire connection part of the new and old bridges are enhanced to ensure sufficient reaction force when the deformation of the foundations of the new and old bridges is inconsistent in the subsequent process. Such a steel plate and concrete combined rigid structure is more durable and has greater compressive strength, bending and shearing strength than a pure concrete rigid structure, which will greatly reduce the repair and maintenance costs of the new and old bridges in the later stage.

[0005] Although this rigid connection method forms a rigid connection between the new and old bridge bodies, there will be a difference in foundation settlement during the use of the widened and rebuilt bridge. That is, the old bridge has been in service for many years and the foundation settlement has been completed, while the new bridge will have foundation settlement at the beginning, resulting in vertical shear force at the connection, which will cause the development of road cracks, affecting traffic operations and posing a safety hazard. In addition, this connection method uses a large amount of steel and has low economic benefits. The steel plate cannot be guaranteed to be absolutely rigid. After a long period of load application, the steel plate will deform, which will subsequently cause damage to the connection. The use of this connection method cannot offset the horizontal load generated during vehicle driving, thereby reducing the service life of the bridge. In addition, the rigid connection between the new and old bridge bodies will cause the force on the old bridge to be transmitted to the new bridge through the rigid joints, causing the new bridge to be stressed in advance before it reaches the service strength, thereby accelerating the destruction of the new bridge. Utility Model Content

[0006] The purpose of the utility model is to solve the deficiencies of the prior art and propose a horizontal energy-consuming connection device between the new and old bridge bodies. The device is easy to construct and takes a short construction time, and can avoid affecting normal traffic to the greatest extent. The connection method realizes a rigid connection through a flexible connection. The flexible connection can offset the vertical shear force caused by uneven settlement of the foundation, thereby inhibiting the development of longitudinal cracks in the road surface. The flexible connection can reduce the force transmitted from the old bridge to the new bridge, thereby increasing the service life of the new bridge and reducing the subsequent maintenance costs. The energy generated by most external forces can be offset, thereby increasing the service life of the bridge after widening and reconstruction.

[0007] A horizontal energy-absorbing connection device between a new and an old bridge body comprises a bridge seam shielding unit and a bridge seam energy-absorbing connection unit; both sides of the bridge seam shielding unit are respectively fixed on the bridge decks of a new bridge body and an original bridge body, and the lower part of the bridge seam shielding unit upwardly constrains the bridge seam energy-absorbing connection unit; a plurality of bridge seam energy-absorbing connection units are provided, and both sides of the bridge seam energy-absorbing connection units are respectively fixed on the side walls of the opposite surfaces of the new bridge body and the original bridge body, and the deformation of the bridge seam energy-absorbing connection unit consumes the kinetic energy generated when the new bridge body and the original bridge body undergo relative movement.

[0008] Preferably, the bridge seam shielding unit includes a steel transverse connecting plate, a vertical connecting plate and an arc-shaped constraint plate, wherein the transverse connecting plate is arranged along the joint between the newly built bridge body and the original bridge body, and the two sides of the transverse connecting plate are respectively fixed to the bridge deck of the newly built bridge body and the original bridge body by expansion bolts, and a plurality of vertical connecting plates are vertically fixed in the middle of the transverse connecting plate; the top arc surface of the arc-shaped constraint plate is fixedly connected to the plurality of vertical connecting plates.

[0009] Preferably, the bridge joint energy dissipation connection unit includes a T-shaped support, an elastic deformation ring, a buffer ring, a restraint ring and a buffer spring;

[0010] The T-shaped support is fixedly mounted on the side walls of the new bridge body and the original bridge body opposite to each other through expansion bolts. The side walls of the T-shaped support are provided with a concave arc surface that is slidably supported and fits the outer arc surface of the elastic deformation ring, and a bolt is fixedly connected to the middle of the concave arc surface of the T-shaped support.

[0011] The bolts are laterally penetrated and slidably connected to the two sides of the elastic deformation circle, and the bolt ends located inside the elastic deformation circle are threadedly sleeved with a fixed buffer ring;

[0012] There are multiple buffer rings, and the other ends of the buffer rings are sleeved in the restraint rings;

[0013] A buffer spring is movably arranged in the restraining ring, and two ends of the buffer spring are respectively welded and fixed to support the buffer ring located inside the restraining ring.

[0014] Preferably, the buffer ring is a U-shaped rigid block, a locking nut is welded and fixed on the bottom of the buffer ring, and a locking pin is fixedly connected to the transverse pin at the top opening of the buffer ring; a bolt is penetrated and threaded into the locking nut; the locking pin is inserted into the restraint ring, and one end of the buffer spring is radially welded and fixed to the middle of the locking pin.

[0015] The advantages and technical effects of the utility model are:

[0016] The utility model discloses a horizontal energy-absorbing connection device between a new bridge body and an old bridge body. The bridge seam shielding unit is used to cover the bridge seam and to provide an upward limit for the deformation of the elastic deformation ring in the bridge seam energy-absorbing connection unit, so as to avoid excessive deformation of the elastic deformation ring and thus plastic deformation. In the specific bridge joint energy-absorbing connection unit, a buffer ring is first set in the constraint ring by pulling, and the bolts and T-shaped support connected at the other end of the buffer ring form a tension system on a horizontal straight line to avoid excessive gap between the original bridge body and the newly built bridge body; at the same time, the concave arc surface of the T-shaped support cooperates with the arc outer wall of the elastic deformation ring to provide the elastic deformation ring with a horizontal opposite extrusion pressure, so that the deformation of the elastic deformation ring absorbs the kinetic energy of the opposite movement of the original bridge body and the newly built bridge body; and the reset spring also provides a certain buffering effect for the buffer rings at both ends of it, absorbing the kinetic energy of the opposite movement of the new and old bridge bodies, and on the other hand, the reset spring also has a self-centering function to ensure that the constraint ring is always located in the middle position of the line connecting the buffer rings at both ends of it, so as to avoid misalignment and twisting of the constraint ring, and then directly break due to lack of buffer margin when receiving the back tension of the new and old bridge bodies again. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0018] Figure 2 It is a top view of the utility model (the bridge gap shielding unit is not shown);

[0019] Figure 3It is a three-dimensional structural schematic diagram of the energy-dissipating connection unit of the bridge seam in the utility model;

[0020] Figure 4 It is a three-dimensional structural schematic diagram of a T-shaped support in the bridge joint energy dissipation connection unit of the utility model;

[0021] In the figure: 1- horizontal connecting plate; 2- vertical connecting plate; 3- arc-shaped constraint plate; 4- elastic deformation ring; 5- constraint ring; 6- buffer spring; 7- locking pin; 8- buffer ring; 9- bolt; 10- T-shaped support; 11- locking nut; 12- concave arc surface. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, 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 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.

[0024] A horizontal energy-absorbing connection device between a new and an old bridge body comprises a bridge seam shielding unit and a bridge seam energy-absorbing connection unit; both sides of the bridge seam shielding unit are respectively fixed on the bridge decks of a new bridge body and an original bridge body, and the lower part of the bridge seam shielding unit upwardly constrains the bridge seam energy-absorbing connection unit; a plurality of bridge seam energy-absorbing connection units are provided, and both sides of the bridge seam energy-absorbing connection units are respectively fixed on the side walls of the opposite surfaces of the new bridge body and the original bridge body, and the deformation of the bridge seam energy-absorbing connection unit consumes the kinetic energy generated when the new bridge body and the original bridge body undergo relative movement.

[0025] Preferably, the bridge seam shielding unit includes a steel transverse connecting plate 1, a vertical connecting plate 2 and an arc-shaped constraint plate 3, wherein the transverse connecting plate is arranged along the joint between the newly built bridge body and the original bridge body, and the two sides of the transverse connecting plate are respectively fixed to the bridge deck of the newly built bridge body and the original bridge body by expansion bolts, and a plurality of vertical connecting plates are vertically fixed in the middle of the transverse connecting plate; the top arc surface of the arc-shaped constraint plate is fixedly connected to the plurality of vertical connecting plates.

[0026] Preferably, the bridge joint energy dissipation connection unit comprises a T-shaped support 10, an elastic deformation ring 4, a buffer ring 8, a restraining ring 5 and a buffer spring 6;

[0027] The T-shaped support is fixedly mounted on the side walls of the new bridge body and the original bridge body opposite to each other by expansion bolts. The side walls of the T-shaped support are provided with a concave arc surface 12 which is slidably supported and fits the outer arc surface of the elastic deformation ring, and a bolt 9 is fixedly connected to the middle of the concave arc surface of the T-shaped support.

[0028] The bolts are laterally penetrated and slidably connected to the two sides of the elastic deformation circle, and the bolt ends located inside the elastic deformation circle are threadedly sleeved with a fixed buffer ring;

[0029] There are multiple buffer rings, and the other ends of the buffer rings are sleeved in the restraint rings;

[0030] A buffer spring is movably arranged in the restraining ring, and two ends of the buffer spring are respectively welded and fixed to support the buffer ring located inside the restraining ring.

[0031] Preferably, the buffer ring is a U-shaped rigid block, a locking nut 11 is welded and fixed to the bottom of the buffer ring, and a locking pin 7 is fixedly connected to the top opening of the buffer ring with a transverse pin; a bolt is penetrated and threaded into the locking nut; the locking pin is inserted into the restraint ring, and one end of the buffer spring is radially welded and fixed to the middle of the locking pin.

[0032] In order to more clearly illustrate the specific implementation of the utility model, an embodiment is provided below:

[0033] The utility model discloses a horizontal energy-dissipating connection device between a new bridge body and an old bridge body. During the installation process, T-shaped supports are symmetrically fixed on the facing sides of the new bridge body and the original bridge body, and then bolts are threadedly connected to the T-shaped supports, and then the two sides of the elastic deformation ring are plugged onto the bolts; then buffer rings are threadedly connected to the ends of the two bolts inside the elastic deformation ring, and a restraining ring is placed in the middle of the two buffer rings; finally, a locking pin is inserted into the buffer ring and fixed by welding, and then a buffer spring is placed in the restraining ring, and the two ends of the buffer spring are fixed by welding to the locking pin.

[0034] The above process is the installation procedure of a set of bridge joint energy dissipation connection units. Figure 2 As shown, an appropriate number of bridge seam energy dissipation connection units are selected for installation according to the length of the bridge seam; finally, the upper opening of the bridge seam is blocked with the welded bridge seam shielding unit, thus completing the installation construction of the horizontal energy dissipation connection device of the utility model.

[0035] Finally, all the parts not fully described in the present invention adopt mature products and mature technical means in the prior art.

[0036] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in combination with the embodiment or example are included in the embodiments or examples of the utility model.

[0037] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A horizontal energy-dissipating connection device between a new and an old bridge body, characterized in that: It includes a bridge seam shielding unit and a bridge seam energy-absorbing connection unit; the two sides of the bridge seam shielding unit are respectively fixed on the bridge deck of the newly built bridge body and the original bridge body, and the lower part of the bridge seam shielding unit upwardly constrains the bridge seam energy-absorbing connection unit; the bridge seam energy-absorbing connection unit is provided with a plurality of groups, and the two sides of the bridge seam energy-absorbing connection unit are respectively fixed on the side walls of the opposite surfaces of the newly built bridge body and the original bridge body, and the deformation of the bridge seam energy-absorbing connection unit consumes the kinetic energy generated when the newly built bridge body and the original bridge body undergo relative movement.

2. The horizontal energy dissipation connection device between the new and old bridge bodies according to claim 1 is characterized in that: The bridge seam shielding unit includes a steel transverse connecting plate, a vertical connecting plate and an arc-shaped constraint plate, wherein the transverse connecting plate is arranged along the joint between the newly built bridge body and the original bridge body, and the two sides of the transverse connecting plate are respectively fixed to the bridge deck of the newly built bridge body and the original bridge body by expansion bolts, and a plurality of vertical connecting plates are vertically fixed in the middle of the transverse connecting plate; the top arc surface of the arc-shaped constraint plate is fixedly connected to the plurality of vertical connecting plates.

3. The horizontal energy dissipation connection device between the new and old bridge bodies according to claim 1 is characterized in that: The bridge joint energy dissipation connection unit comprises a T-shaped support, an elastic deformation ring, a buffer ring, a restraint ring and a buffer spring; The T-shaped support is fixedly mounted on the side walls of the new bridge body and the original bridge body opposite to each other through expansion bolts. The side walls of the T-shaped support are provided with a concave arc surface that is slidably supported and fits the outer arc surface of the elastic deformation ring, and a bolt is fixedly connected to the middle of the concave arc surface of the T-shaped support. The bolts are laterally penetrated and slidably connected to the two sides of the elastic deformation ring, and the bolt ends located inside the elastic deformation ring are threadedly sleeved on the fixed buffer ring; There are multiple buffer rings, and the other ends of the buffer rings are all sleeved in the restraint ring; A buffer spring is movably arranged in the restraining ring, and two ends of the buffer spring are respectively welded and fixed and supported on the buffer ring located inside the restraining ring.

4. The horizontal energy dissipation connection device between the new and old bridge bodies according to claim 3 is characterized in that: The buffer ring is a U-shaped rigid block, a locking nut is welded and fixed on the bottom of the buffer ring, and a locking pin is fixedly connected to the transverse pin at the top opening of the buffer ring; a bolt is penetrated and threadedly connected in the locking nut; the locking pin is inserted in the restraint ring, and one end of the buffer spring is radially welded and fixed to the middle of the locking pin.

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