Multi-span continuous rigid frame girder bridge capable of realizing long connection and self-resetting

Abstract

The utility model provides a multi-span continuous rigid frame girder bridge capable of realizing long connection and self-resetting, and relates to the technical field of bridge engineering. The multi-span continuous rigid frame beam bridge capable of achieving long connection and self-resetting comprises a main beam, a bearing platform assembly, a rigid pier and two self-resetting movable piers, the rigid pier and the self-resetting movable piers are both connected with the bottom wall of the main beam, and the rigid pier is located between the two self-resetting movable piers in the longitudinal direction of the main beam; the bearing platform assembly comprises a first foundation bearing platform and two second foundation bearing platforms, and the rigid pier is connected with the first foundation bearing platform; the end face, away from the main beam, of the self-resetting movable pier is a curved surface, a groove is formed in the top wall of the second foundation platform, and the curved surface is movably matched with the groove so that the curved surface can rotate in the groove or slide in the longitudinal direction of the main beam. The multi-span continuous rigid frame girder bridge solves the technical problems that in the prior art, a continuous rigid frame bridge is small in application range, and bridge repairing after an earthquake and temporary passing of disaster relief vehicles are not facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge engineering, in particular to a multi-span continuous rigid frame beam bridge which can realize long connection and self-reset. Background Art

[0002] The continuous rigid frame bridge consolidates the pier and the main beam into one, which jointly bear the load of the superstructure. Compared with the continuous beam bridge, this type of bridge has the advantages of high overall rigidity, good driving comfort, fewer supports and expansion joints, simple maintenance and strong spanning capacity.

[0003] Conventional continuous rigid frame bridges use the flexibility of high piers to adapt to the displacement of the structure caused by concrete shrinkage creep and temperature changes. Its span and length are restricted by the height or flexibility of the lower piers. When the pier height is short, the longitudinal deformation of the bridge caused by concrete shrinkage creep and temperature makes the internal force caused by the deformation of the outer piers larger, and its strength and cracks often cannot meet the design requirements. At this time, the continuous rigid frame bridge type will no longer be applicable, or it can be solved by reducing its span and length, but it can no longer give full play to the advantages of this bridge type. In addition, the main beam of the conventional continuous rigid frame bridge is consolidated with the piers and the piers are consolidated with the foundation. Its overall stiffness is relatively large. Under the action of earthquakes, the seismic force on the lower piers and foundations is also large. Continuous seismic design is often adopted to allow the pier steel bars to yield and form plastic hinges. Therefore, the residual displacement of the piers after the earthquake is large, which is not conducive to the post-earthquake bridge repair and the temporary passage of disaster relief vehicles. Utility Model Content

[0004] The utility model aims to provide a multi-span continuous rigid frame beam bridge which can realize long connection and self-reset, so as to alleviate the technical problems existing in the prior art that the continuous rigid frame bridge has a small application range and is not conducive to post-earthquake bridge repair and temporary passage of disaster relief vehicles.

[0005] In order to solve the above technical problems, the technical solution provided by the utility model is:

[0006] The multi-span continuous rigid frame beam bridge that can realize long connection and self-reset provided by the utility model comprises a main beam, a cap assembly, a rigid pier and two self-reset movable piers, wherein the rigid pier and the self-reset movable pier are both connected to the bottom wall of the main beam, and along the longitudinal direction of the main beam, the rigid pier is located between the two self-reset movable piers;

[0007] The cap assembly includes a first base cap and two second base caps, and the rigid pier is connected to the first base cap;

[0008] The end surface of the self-resetting movable pier away from the main beam is set as a curved surface, and the top wall of the second foundation support is provided with a groove. The curved surface and the groove are movably matched so that the curved surface can rotate in the groove or slide along the longitudinal direction of the main beam.

[0009] Furthermore, along the longitudinal direction of the main beam, the width of the groove is greater than the diameter of the curved surface.

[0010] Furthermore, the groove is configured as an arc surface along two opposite side walls of the main beam, and the arc surface is recessed in a direction away from the self-resetting movable pier.

[0011] Furthermore, the bottom wall of the groove is configured as an arc surface that is recessed toward the direction approaching the self-resetting movable pier.

[0012] Furthermore, a first sliding plate is installed on the curved surface of the self-resetting movable pier, and a second sliding plate is installed on the inner wall of the groove.

[0013] Furthermore, the first sliding plate is connected to the curved surface via shear nails.

[0014] Furthermore, the second sliding plate is connected to the inner wall of the groove via shear nails.

[0015] Furthermore, a plurality of the rigid piers are provided, and the plurality of the rigid piers are arranged at intervals along the longitudinal direction of the main beam, and are all located between two of the self-resetting movable piers.

[0016] Furthermore, the multi-span continuous rigid frame beam bridge also includes beam end abutments, and both ends of the main beam are movably connected to the beam end abutments.

[0017] Furthermore, a sliding bearing is installed between the end of the main beam and the beam end abutment.

[0018] Based on the above technical solutions, the technical effects that can be achieved by the present invention are analyzed as follows:

[0019] The utility model provides a multi-span continuous rigid frame beam bridge that can realize long connection and self-reset, including a main beam, a cap assembly, a rigid pier and two self-reset movable piers, the rigid pier and the self-reset movable pier are both connected to the bottom wall of the main beam, and along the longitudinal direction of the main beam, the rigid pier is located between the two self-reset movable piers; the cap assembly includes a first basic cap and two second basic caps, the rigid pier is connected to the first basic cap; the end face of the self-reset movable pier away from the main beam is set as a curved surface, the top wall of the second basic cap is provided with a groove, the curved surface and the groove are movably matched so that the curved surface can rotate in the groove or slide along the longitudinal direction of the main beam. Among them, the main beam plays a spanning role.

[0020] The middle pier of this bridge type is a rigid pier, and the piers on both sides are self-resetting movable piers, which not only ensure that the bridge has a certain rigidity under the action of horizontal external forces and guarantee the normal use of the bridge, but also its outer self-resetting movable piers can slide and rotate freely longitudinally, and can adapt to the longitudinal translation and rotation caused by concrete shrinkage creep and temperature. Under the same conditions, the span and joint length of the continuous rigid frame bridge type can be significantly increased, and even if the pier height is relatively short, it will not be affected. This greatly improves the applicability of the continuous rigid frame bridge.

[0021] The bottom of the self-resetting movable pier of this bridge type and the second foundation pedestal adopt a curved surface movable contact. When the bridge undergoes a large deformation under the action of an earthquake, the bridge's own weight will provide a horizontal component force on the curved surface, so that the bridge has a certain self-resetting ability, thereby greatly reducing the residual deformation of the bridge after the earthquake and facilitating the post-earthquake repair of the bridge. At the same time, the sliding of the self-resetting movable pier in the top groove of the second foundation pedestal can also play a certain energy dissipation role, which can reduce the seismic response of the bridge structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the structure of a multi-span continuous rigid frame beam bridge that can achieve long connection and self-reset provided by an embodiment of the utility model;

[0024] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0025] Figure 3 for Figure 1 A partial enlarged view of point B in the middle;

[0026] Figure 4 for Figure 1 A partial enlarged view of point C in the middle.

[0027] icon:

[0028] 110-main beam; 120-rigid pier; 130-self-resetting movable pier; 131-first sliding plate;

[0029] 210 - first basic support platform; 220 - second basic support platform; 221 - groove; 222 - second sliding plate;

[0030] 300- beam end abutment; 310- sliding bearing;

[0031] 400-shear nails;

[0032] 500-pile foundation;

[0033] a-longitudinal direction of the main beam; DETAILED DESCRIPTION

[0034] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0037] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0038] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0039] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0041] The multi-span continuous rigid frame beam bridge that can achieve long connection and self-reset provided by the embodiment of the utility model includes a main beam 110, a pedestal assembly, a rigid pier 120 and two self-reset movable piers 130, the rigid pier 120 and the self-reset movable pier 130 are both connected to the bottom wall of the main beam 110, and along the longitudinal direction a of the main beam, the rigid pier 120 is located between the two self-reset movable piers 130; the pedestal assembly includes a first basic pedestal 210 and two second basic pedestals 220, the rigid pier 120 is connected to the first basic pedestal 210; the end face of the self-reset movable pier 130 facing away from the main beam 110 is set as a curved surface, and the top wall of the second basic pedestal 220 is provided with a groove 221, and the curved surface and the groove 221 are movably matched so that the curved surface can rotate in the groove 221 or slide along the longitudinal direction a of the main beam.

[0042] Specifically, see Figures 1 to 3 The main beam 110 and the bridge piers are rigidly connected. One or more bridge piers located in the middle of the bridge body are rigidly connected to the first foundation pedestal 210, which are rigid piers 120; the bridge piers located on both sides of the bridge body are in contact with the second foundation pedestal 220 through a smooth curved surface that can slide and rotate longitudinally, and have a certain self-resetting ability, which are self-resetting movable piers 130; the bridge piers on both sides that are greatly affected by concrete shrinkage creep and temperature changes adopt self-resetting movable piers 130, which are rigidly connected to the main beam 110, and the bottom of the self-resetting movable pier 130 is in contact with the second foundation pedestal 220 through a smooth curved surface that can slide and rotate longitudinally. After a large longitudinal displacement occurs under the action of an earthquake, the self-resetting movable pier 130 has a certain self-resetting ability. Furthermore, a plurality of rigid piers 120 are provided, and the plurality of rigid piers 120 are spaced apart along the longitudinal direction a of the main beam, and are all located between two self-resetting movable piers 130; the number of rigid piers 120 located in the middle of a multi-span continuous rigid frame beam bridge that can achieve long connection and self-resetting is calculated and determined based on comprehensive factors such as the number of bridge spans, bridge length, bridge height, external forces, etc.

[0043] The main beam 110 plays a spanning role, and the number of spans of the main beam 110 is not less than three. The middle pier of this bridge type adopts a rigid pier 120, and the piers on both sides adopt self-resetting movable piers 130, which can not only ensure that the bridge has a certain rigidity under the action of horizontal external forces and ensure the normal use of the bridge, but also its outer self-resetting movable piers 130 can slide and rotate freely longitudinally, and can adapt to the longitudinal translation and rotation caused by concrete shrinkage creep and temperature. Under the same conditions, the span and joint length of the continuous rigid frame bridge type can be significantly increased, even if the pier height is shorter, it will not be affected, which greatly improves the applicability of the continuous rigid frame bridge. The pier bottom and the second foundation pedestal 220 of this bridge type adopt curved surface movable contact. When the bridge undergoes a large deformation under the action of an earthquake, the bridge's own weight will provide a horizontal component force on the curved surface, so that the bridge has a certain self-resetting ability, thereby greatly reducing the residual deformation of the bridge after the earthquake, and facilitating the post-earthquake repair of the bridge. At the same time, the self-resetting movable pier 130 sliding in the top groove 221 of the second foundation pedestal 220 can also play a certain role in energy consumption, thereby reducing the seismic response of the bridge structure.

[0044] The following is a detailed description of the structure and shape of a multi-span continuous rigid frame beam bridge that can achieve long connection and self-reset:

[0045] In an optional solution of the embodiment of the utility model, along the longitudinal direction a of the main beam, the width of the groove 221 is greater than the diameter of the curved surface.

[0046] Specifically, see Figure 2 The horizontal cross-section of the self-resetting movable pier 130 is set to be a rectangle, and the bottom wall is set to be a downwardly concave curved surface.

[0047] The width of the groove 221 is greater than the diameter of the curved surface, so as to expand the movable range of the self-resetting movable pier 130 in the groove 221 .

[0048] In the optional scheme of the embodiment of the utility model, please see Figure 2 The groove 221 is configured as an arc surface along two opposite side walls of the main beam 110 , and the arc surface is recessed in a direction away from the self-resetting movable pier 130 .

[0049] The two side walls are both configured as arc surfaces, so that the self-resetting movable pier 130 can be reset.

[0050] In the optional scheme of the embodiment of the utility model, please see Figure 2 The bottom wall of the groove 221 is configured as an arc surface that is recessed toward the direction approaching the self-resetting movable pier 130 .

[0051] Specifically, the diameter of the arc surface of the bottom wall is greater than the diameter of the arc surface of the side wall.

[0052] The bottom wall is configured as a slightly upwardly concave arc surface so that the self-resetting movable pier 130 can slide.

[0053] In an optional solution of the embodiment of the utility model, a first sliding plate 131 is installed on the curved surface of the self-resetting movable pier 130 , and a second sliding plate 222 is installed on the inner wall of the groove 221 .

[0054] Specifically, the first sliding plate 131 is consistent with the curved surface shape of the self-resetting movable pier 130, so that the first sliding plate 131 fits the curved surface of the self-resetting movable pier 130; similarly, the second sliding plate 222 is consistent with the inner wall shape of the groove 221, so that the second sliding plate 222 fits the inner wall of the groove 221; it is worth noting that the fit refers to the contact between two objects, and does not limit the connection method. In this embodiment, the first sliding plate 131 and the second sliding plate 222 are both set as stainless steel plates; of course, the first sliding plate 131 and the second sliding plate 222 are made of other materials to achieve a smoother effect between the curved surface of the self-resetting movable pier 130 and the inner wall of the groove 221, which should also be within the protection scope of the embodiment of the utility model.

[0055] The first sliding plate 131 cooperates with the second sliding plate 222 to reduce the friction between the self-resetting movable pier 130 and the inner wall of the groove 221, so that the self-resetting movable pier 130 can be self-reset and slide along the longitudinal direction a of the main beam. In addition, when constructing the self-resetting movable pier 130, the first sliding plate 131 can be pre-buried and then cast to form the self-resetting movable pier 130 with a curved surface. In addition, the first sliding plate 131 and the second sliding plate 222 can protect the self-resetting movable pier 130 and the second foundation pedestal 220.

[0056] In an optional solution of the embodiment of the utility model, the first sliding plate 131 is connected to the curved surface through the shear nail 400, and the second sliding plate 222 is connected to the inner wall of the groove 221 through the shear nail 400.

[0057] Specifically, a plurality of shear nails 400 installed on the curved surface are provided, and the plurality of shear nails 400 are arranged at intervals along the circumference of the curved surface; a plurality of shear nails 400 installed on the inner wall of the groove 221 are provided, and the plurality of shear nails 400 are arranged at intervals along the circumference of the groove 221.

[0058] The shear nails 400 enable the first sliding plate 131 to be installed at the bottom of the self-resetting movable pier 130 , and enable the second sliding plate 222 to be installed in the groove 221 of the second foundation platform 220 .

[0059] In an optional solution of the embodiment of the utility model, the second basic support 220 is provided with a drainage hole.

[0060] Specifically, the top surface of the second foundation pedestal 220 is higher than the design flood level of the bridge, and a drainage hole is provided at the lowest point of the groove 221. Furthermore, for the self-resetting movable pier 130 with a small volume, a prefabricated assembly structure can be used, and the construction is more convenient and quick. The bottom of the self-resetting movable pier 130 and the corresponding top of the second foundation pedestal 220 can be made of high-strength and high-performance concrete materials, such as UHPC (ultra-high performance concrete).

[0061] The second foundation support 220 is provided with drainage holes and the like to improve the durability of the curved surface of the self-resetting movable pier 130 .

[0062] In the optional scheme of the embodiment of the utility model, please see Figure 1 and Figure 4 The multi-span continuous rigid frame beam bridge further includes a beam end abutment 300, and both ends of the main beam 110 are movably connected to the beam end abutment 300.

[0063] Specifically, due to thermal expansion and contraction, the ends of a bridge generally have large longitudinal deformations, so the beam end abutments 300 are movably connected to both ends of the main beam 110 to achieve free deformation of the ends of the main beam 110 in the longitudinal direction.

[0064] In an optional solution of the embodiment of the utility model, a sliding bearing 310 is installed between the end of the main beam 110 and the beam end abutment 300.

[0065] Specifically, the sliding bearing 310 can be set as a skateboard-type rubber bearing. Of course, the sliding bearing 310 can be set as other bearings that can meet the requirements of the main beam 110 and the beam end abutment 300 being able to shift along the longitudinal direction a of the main beam, which are all within the protection scope of the embodiments of the utility model.

[0066] The sliding platform support realizes the movable connection between the two ends of the main beam 110 and the abutments at both ends.

[0067] The following is a detailed description of the construction steps of a multi-span continuous rigid frame beam bridge that can achieve long-span connection and self-reset:

[0068] The first step is to construct the pile foundation 500, and then construct the first foundation cap 210, and pre-embed the rigid pier 120 pier body steel bars in the first foundation cap 210;

[0069] The second basic support 220 can be implemented simultaneously, and the second sliding plate 222 on the second basic support 220 can be embedded in advance;

[0070] The second step is to construct the beam end abutment 300;

[0071] The third step is to temporarily fix the self-resetting movable pier 130 by using a bracket, install the first sliding plate 131 at the bottom of the self-resetting movable pier 130, and construct the self-resetting movable pier 130 and the rigid pier 120;

[0072] Step 4: Using the cantilever construction method, the main beam 110 is cantilevered and cast from the pier to the middle of the span, and the side span main beams 110 are first closed, and then the middle span main beams 110 are closed in the middle of the span;

[0073] Step 5: dismantle the temporary consolidation support of the self-resetting movable pier 130 and carry out system conversion;

[0074] Step 6: Construct the bridge deck system.

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A multi-span continuous rigid frame beam bridge capable of achieving long connection and self-reset, characterized in that: include: A main beam (110), a cap assembly, a rigid pier (120) and two self-resetting movable piers (130); The rigid pier (120) and the self-resetting movable pier (130) are both connected to the bottom wall of the main beam (110), and along the longitudinal direction (a) of the main beam, the rigid pier (120) is located between the two self-resetting movable piers (130); The capping platform assembly comprises a first basic capping platform (210) and two second basic capping platforms (220), and the rigid pier (120) is connected to the first basic capping platform (210); The end surface of the self-resetting movable pier (130) facing away from the main beam (110) is arranged as a curved surface, and the top wall of the second foundation support platform (220) is provided with a groove (221), and the curved surface and the groove (221) are movably matched so that the curved surface can rotate in the groove (221) or slide along the longitudinal direction (a) of the main beam.

2. The multi-span continuous rigid frame beam bridge according to claim 1, characterized in that: Along the longitudinal direction (a) of the main beam, the width of the groove (221) is greater than the diameter of the curved surface.

3. The multi-span continuous rigid frame beam bridge according to claim 2, characterized in that: The groove (221) is configured as an arc surface along two opposite side walls of the main beam (110), and the arc surface is recessed in a direction away from the self-resetting movable pier (130).

4. The multi-span continuous rigid frame beam bridge according to claim 3, characterized in that: The bottom wall of the groove (221) is configured as an arc surface that is recessed in a direction approaching the self-resetting movable pier (130).

5. The multi-span continuous rigid frame beam bridge according to claim 1, characterized in that: A first sliding plate (131) is installed on the curved surface of the self-resetting movable pier (130), and a second sliding plate (222) is installed on the inner wall of the groove (221).

6. The multi-span continuous rigid frame beam bridge according to claim 5, characterized in that: The first sliding plate (131) is connected to the curved surface via shear pins (400).

7. The multi-span continuous rigid frame beam bridge according to claim 6, characterized in that: The second sliding plate (222) is connected to the inner wall of the groove (221) via shear nails (400).

8. The multi-span continuous rigid frame beam bridge according to any one of claims 1 to 7, characterized in that: A plurality of the rigid piers (120) are provided, and the plurality of the rigid piers (120) are arranged at intervals along the longitudinal direction (a) of the main beam, and are all located between two of the self-resetting movable piers (130).

9. The multi-span continuous rigid frame beam bridge according to claim 1, characterized in that: The multi-span continuous rigid frame beam bridge also includes a beam end abutment (300), and both ends of the main beam (110) are movably connected to the beam end abutment (300).

10. The multi-span continuous rigid frame beam bridge according to claim 9, characterized in that: A sliding support (310) is installed between the end of the main beam (110) and the beam end abutment (300).

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