Bridge structure widening and transforming system and forming method thereof

Abstract

The invention discloses a broadened and transformed bridge structure system suitable for a strong earthquake area and a forming method of the broadened and transformed bridge structure system, and relates to the technical field of existing bridge reinforcing and renoving.The bridge structure system comprises an existing bridge and a newly-built bridge, and a main beam of the existing bridge is connected with a main beam of the newly-built bridge; a first support is arranged between a cover beam of the existing bridge and a main beam of the existing bridge and used for achieving sliding between the cover beam of the existing bridge and the main beam of the existing bridge, and a second support is arranged between a cover beam of the newly-built bridge and a main beam of the newly-built bridge and used for achieving sliding between the cover beam of the newly-built bridge and the main beam of the newly-built bridge. And the second support is used for consuming earthquake energy. According to the widened and transformed bridge structure and the construction method thereof, the problems that the pier and the foundation of an existing bridge are insufficient in shock resistance, and reinforcement consumes time and cost are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of reinforcement and reconstruction of existing bridges, and in particular to a bridge widening and reconstruction structural system and a construction method thereof. Background Art

[0002] In the technical requirements for bridge reconstruction and expansion, the superstructure (main beam) of the newly built bridge and the existing bridge are usually connected as a whole to facilitate traffic. The newly built bridge piers and the existing bridge piers have the characteristic of jointly resisting earthquake effects. This also brings about complex problems: in terms of seismic fortification and performance requirements, the capacity of existing bridge piers and foundations is often weak, and reinforcement measures are needed to effectively improve their ductility. However, foundation reinforcement has the obvious disadvantages of being economically and time-consuming. When soft soil / liquefied sites are involved, the contradiction will be more prominent. Summary of the Invention

[0003] The purpose of the present invention is to provide a bridge structure system for widening and reconstruction and a method for constructing the system, which solves the problem that the piers and foundations of existing bridges have insufficient seismic resistance and reinforcement is time-consuming and costly.

[0004] To achieve the above object, the present invention provides the following solutions:

[0005] The present invention provides a bridge structure system for widening and renovating, comprising: an existing bridge and a newly built bridge, wherein the main beam of the existing bridge is connected to the main beam of the newly built bridge, a first support is provided between the cap beam of the existing bridge and the main beam of the existing bridge, the first support is used to achieve sliding between the cap beam of the existing bridge and the main beam of the existing bridge, a second support is provided between the cap beam of the newly built bridge and the main beam of the newly built bridge, the second support is used to consume earthquake energy.

[0006] In some specific solutions, there are two newly built bridges, which are respectively arranged on both sides of the existing bridge.

[0007] In some specific solutions, the two piers of the newly built bridge are preferably symmetrically arranged on both sides of the pier of the existing bridge.

[0008] In some specific solutions, the two main beams of the newly constructed bridges are preferably symmetrically arranged on both sides of the main beam of the existing bridge.

[0009] In some specific embodiments, the first support is a sliding friction support.

[0010] In some specific embodiments, the second support is a seismic isolation support.

[0011] In some specific solutions, first blocks are provided at both ends of the cap beam of the existing bridge.

[0012] In some specific solutions, second blocks are provided at both ends of the cap beam of the newly built bridge.

[0013] In some specific solutions, the width of the cap beam of the existing bridge can be appropriately widened, and the width of the cap beam of the existing bridge is greater than the width of the cap beam of the newly built bridge.

[0014] The present invention also provides a method for constructing the widening and reconstruction bridge structure system, comprising:

[0015] Constructing piers for the new bridge on both sides of the piers of the existing bridge;

[0016] Constructing the main beams of the new bridge on both sides of the main beam of the existing bridge, and connecting the main beams of the new bridge to the main beams of the existing bridge;

[0017] A first bearing is provided between a cap beam of an existing bridge and a main beam of the existing bridge;

[0018] A second support is provided between the cap beam of the newly constructed bridge and the main beam of the newly constructed bridge;

[0019] Widen the cap beam of an existing bridge.

[0020] Compared with the prior art, the present invention has achieved the following technical effects:

[0021] In the widening and reconstruction bridge structure system of the present invention, the piers of the existing bridge mainly bear the weight of the main beam of the existing bridge, the main beam of the newly built bridge, and the cars traveling on the bridge deck. By setting a first bearing between the cap beam of the existing bridge and the main beam of the existing bridge to achieve sliding, the piers and foundation of the existing bridge no longer bear the horizontal seismic force of the main beam of the existing bridge and the main beam of the newly built bridge, so that the purpose of not needing seismic reinforcement is achieved; by setting a second bearing between the cap beam of the newly built bridge and the main beam of the newly built bridge to consume seismic energy, the purpose of reducing the seismic force applied to the newly built piers and foundation is achieved, making the ductile seismic design of the newly built piers easier to achieve. These will also significantly reduce the earthquake collapse risk of the bridge structure after the expansion and renovation, and have significant economic benefits. The widening and reconstruction bridge structure system of the present invention solves the problem of unified seismic design after the main beam of the existing bridge is connected to the main beam of the new bridge. More importantly, it solves the problem that the piers and foundations of the existing bridge are insufficient in seismic resistance, and reinforcement is time-consuming and costly. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 A front view of a bridge structure in some embodiments of the present invention;

[0024] Figure 2 Axonometric measurements of bridge structures in some embodiments of the present invention Figure 1 ;

[0025] Figure 3 Axonometric measurements of bridge structures in some embodiments of the present invention Figure 2 ;

[0026] Figure 4 An axonometric view of an existing bridge structure in some embodiments of the present invention;

[0027] Figure 5 An axonometric view of a first support of a bridge structure and a pier of an existing bridge in some embodiments of the present invention;

[0028] Figure 6 A schematic diagram of the positional relationship between an existing bridge and a newly constructed bridge of a bridge structure in some embodiments of the present invention;

[0029] In the figure: 1-existing bridge, 2-new bridge, 3-cap beam of existing bridge, 4-main beam of existing bridge, 5-first support, 6-cap beam of new bridge, 7-main beam of new bridge, 8-second support. DETAILED DESCRIPTION

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] The purpose of the present invention is to provide a bridge structure system for widening and reconstruction and a method for constructing the system, which solves the problem that the piers and foundations of existing bridges have insufficient seismic resistance and reinforcement is time-consuming and costly.

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] Example 1

[0034] like Figures 1 to 6As shown, this embodiment provides a bridge structure system for widening and renovating, including: an existing bridge 1 and a newly built bridge 2, the main beam 4 of the existing bridge is connected to the main beam 7 of the newly built bridge, a first bearing 5 is provided between the cap beam 3 of the existing bridge and the main beam 4 of the existing bridge, the first bearing 5 is used to realize sliding between the cap beam 3 of the existing bridge and the main beam 4 of the existing bridge, a second bearing 8 is provided between the cap beam 6 of the newly built bridge and the main beam 7 of the newly built bridge, the second bearing 8 is used to consume earthquake energy.

[0035] In specific implementations of some embodiments, there are two newly built bridges 2 , and the two newly built bridges 2 are respectively arranged on both sides of the existing bridge 1 .

[0036] In some embodiments, the piers of the two newly constructed bridges 2 are symmetrically arranged on either side of the piers of the existing bridge 1; and the main beams 7 of the two newly constructed bridges are symmetrically arranged on either side of the main beam 4 of the existing bridge. The symmetrical arrangement of the two newly constructed bridges 2 on either side of the existing bridge 1 ensures balanced force on the entire bridge structure and avoids eccentric loading (seismic torsion) caused by installing the new bridge 2 on only one side of the existing bridge 1.

[0037] In the specific implementation of some embodiments, the first bearing 5 is a sliding friction bearing, which can improve the stress-bearing performance of the bridge structure and reduce the seismic requirements for existing piers and foundations, and adapt to greater displacement requirements. The first bearing 5 can dissipate energy through friction and cooperate with the second bearing 8 to jointly reduce the transmission of seismic force to the piers of the newly built bridge 2, thereby protecting the piers of the newly built bridge 2 from greater damage.

[0038] In the specific implementation of some embodiments, the second support 8 is a seismic isolation support. By arranging the seismic isolation support between the cap beam 6 of the newly built bridge and the main beam 7 of the newly built bridge, the horizontal seismic energy of the main beam 4 of the existing bridge and the main beam 7 of the newly built bridge is dissipated by the seismic isolation support.

[0039] In specific implementations of some embodiments, first blocks are provided at both ends of the cap beam 3 of the existing bridge; second blocks are provided at both ends of the cap beam 6 of the newly built bridge; the first blocks and the second blocks can prevent the beam from falling.

[0040] In some embodiments, in order to solve the problem of fallen beams on old bridges, Figure 4 As shown, the cap beam 3 of the existing bridge is widened on both sides. By widening the cap beam, the ability to resist falling beam damage is improved.

[0041] In some specific implementations of the embodiments, the width of the cap beam 3 of the existing bridge may be greater than the width of the cap beam 6 of the newly built bridge.

[0042] In the widening and reconstruction bridge structure system of this embodiment, the piers of the existing bridge 1 mainly bear the weight of the main beam 4 of the existing bridge, the main beam 7 of the newly built bridge, and the weight of the cars on the bridge deck. By setting sliding friction bearings between the cap beam 3 of the existing bridge and the main beam 4 of the existing bridge, sliding and energy dissipation are achieved. The piers and foundation of the existing bridge 1 no longer bear the horizontal seismic forces of the main beam 4 of the existing bridge and the main beam 7 of the newly built bridge, achieving the purpose of not requiring seismic reinforcement. The piers and foundation of the newly built bridge 2 resist the horizontal seismic effects of the main beam 4 of the existing bridge and the main beam 7 of the newly built bridge with ductility. By setting seismic isolation bearings between the cap beam 6 of the newly built bridge and the main beam 7 of the newly built bridge, the seismic energy is consumed, and the earthquake collapse risk of the bridge structure after the reconstruction and expansion is significantly reduced, which has significant economic benefits. The widening and reconstruction bridge structure system of this embodiment solves the problem of unified seismic design after the main beam 4 of the existing bridge is connected to the main beam of the new bridge. More importantly, it solves the problem that the piers and foundation of the existing bridge 1 have insufficient seismic capacity, and reinforcement is time-consuming and costly.

[0043] Example 2

[0044] like Figures 1 to 6 As shown, this embodiment provides a method for constructing a bridge structure system for widening and reconstruction according to Embodiment 1, comprising:

[0045] The piers of the new bridge 2 are constructed symmetrically on both sides of the piers of the existing bridge 1;

[0046] The deck of the new bridge 2 is constructed symmetrically on both sides of the main beam 4 of the existing bridge to form the main beam 7 of the new bridge, and the main beam 7 of the new bridge is connected to the main beam 4 of the existing bridge. Specifically, the deck of the new bridge 2 and the deck of the existing bridge 1 are laterally connected by a diaphragm.

[0047] A first support 5 is provided between the cap beam 3 of the existing bridge and the main beam 4 of the existing bridge;

[0048] A second support 8 is provided between the cap beam 6 of the newly constructed bridge and the main beam 7 of the newly constructed bridge;

[0049] The cap beam 3 of an existing bridge can be widened.

[0050] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do 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 limiting the present invention. In addition, the terms "first", "second", "third" and the like are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Thus, features defined as "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0051] In the description of the present invention, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; they may refer to mechanical or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this application.

[0052] If the present invention discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connection using bolts or screws), and can also be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integrated structure (for example, manufactured by integrated molding using a casting process) (except where it is obviously impossible to use an integrated molding process).

[0053] In addition, unless otherwise stated, the terms used in any technical solution disclosed in the present invention to express positional relationships or shapes include states or shapes that are approximate, similar, or close thereto.

[0054] Any component provided by the present invention may be assembled from multiple separate components, or may be a separate component manufactured by an integral molding process.

[0055] It should be noted that the structures, proportions, sizes, etc. depicted in the drawings of this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them. They are not used to limit the conditions under which the present invention can be implemented. Therefore, they have no substantive technical significance. Any modification of the structure, change in the proportional relationship or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose that can be achieved by the present invention.

[0056] It should also be noted that in the embodiments of the present application, the same figure mark represents the same component or the same part.

[0057] Adaptive changes based on actual needs are all within the scope of protection of the present invention.

[0058] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only intended to help understand the method and core concept of the present invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the present invention. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A bridge widening and reconstruction system, characterized by: include: An existing bridge and a newly built bridge, the main beam of the existing bridge and the main beam of the newly built bridge are connected, a first bearing is provided between the cap beam of the existing bridge and the main beam of the existing bridge, the first bearing is used to achieve sliding between the cap beam of the existing bridge and the main beam of the existing bridge, a second bearing is provided between the cap beam of the newly built bridge and the main beam of the newly built bridge, the second bearing is used to consume earthquake energy.

2. The bridge widening and reconstruction structure system according to claim 1 is characterized by: There are two newly built bridges, which are respectively arranged on both sides of the existing bridge.

3. The bridge widening and reconstruction structure system according to claim 2 is characterized by: The two bridge piers of the newly built bridge are symmetrically arranged on both sides of the bridge pier of the existing bridge.

4. The bridge widening and reconstruction structure system according to claim 2 is characterized in that: The main beams of the two newly built bridges are symmetrically arranged on both sides of the main beam of the existing bridge.

5. The bridge widening and reconstruction structural system according to claim 1 is characterized in that: The first support is a sliding friction support.

6. The bridge widening and reconstruction structural system according to claim 1 is characterized by: The second support is a shock-isolating support.

7. The bridge widening and reconstruction structural system according to claim 1 is characterized by: First blocks are provided at both ends of the cap beam of the existing bridge.

8. The bridge widening and reconstruction structural system according to claim 1 is characterized by: Second blocks are provided at both ends of the cap beam of the newly built bridge.

9. The bridge widening and reconstruction structural system according to claim 1 is characterized by: The cap beam of the existing bridge can be widened, and the width of the cap beam of the existing bridge is different from the width of the cap beam of the newly built bridge.

10. A method for constructing a widened and reconstructed bridge structure system according to any one of claims 1 to 9, characterized in that: include: Construct the piers of the new bridge symmetrically on both sides of the piers of the existing bridge; The main beams of the new bridge are constructed symmetrically on both sides of the main beams of the existing bridge, and the main beams of the new bridge are connected to the main beams of the existing bridge; A first bearing is provided between a cap beam of an existing bridge and a main beam of the existing bridge; A second support is provided between the cap beam of the newly constructed bridge and the main beam of the newly constructed bridge; Widen the cap beam of an existing bridge.

Images