High pier of large-span continuous rigid frame bridge

Abstract

The utility model discloses a high pier of a large-span continuous rigid frame bridge. The high pier comprises a double-limb pier body, a single-limb pier body, a single-column pier body and a bearing platform which are sequentially connected end to end from top to bottom. The top of the double-limb pier body is fixedly connected with the bottom of the continuous rigid frame bridge girder; the double-limb pier body and the single-limb pier body are each of a hollow thin-wall structure, and the two pier bodies of the double-limb pier body are connected through a straining beam. The double-limb pier body which is light in self weight and large in allowable deformation is arranged on the upper portion of the pier, the weight of the pier is effectively reduced, the anti-pushing rigidity of the pier in the bridge direction is reduced, and the deformation requirement of a high-pier large-span continuous rigid frame bridge is met; meanwhile, the two pier bodies of the double-limb pier body are connected through the straining beam, and the stability of the pier is improved; the single-column pier body with strong bearing capacity and anti-collision capacity is arranged at the lower part of the pier, so that not only is the overall bearing performance of the bridge improved, but also the anti-collision capacity is enhanced; the single-limb pier body is arranged between the double-limb pier body and the single-column pier body, the rigidity and strength of the pier can be adjusted, the pier is evenly stressed, potential damage caused by uneven stress of the pier is reduced, and the service life of the pier is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge engineering, in particular to a high bridge pier of a large-span continuous rigid frame bridge. Background Art

[0002] Long-span continuous rigid-frame bridges have become a mainstream choice in modern bridge construction due to their numerous advantages, including rational structure, convenient construction, economical cost, and smooth driving. This is especially true when crossing complex terrain, such as large rivers, high mountains, and deep valleys. High-pier, long-span bridges can effectively overcome these obstacles.

[0003] However, high-pier, long-span bridges often lie beneath navigable waterways. With my country's increased efforts in waterway reconstruction and construction, navigation capacity has significantly increased. The tonnage and number of ships navigating these waterways have also increased, increasing the risk of ship collisions with bridge piers. A ship collision could damage the bridge structure or even cause it to collapse, seriously impacting traffic and navigation safety.

[0004] Existing bridge pier designs are categorized by cross-sectional form into solid and hollow piers. While solid piers offer strong load-bearing capacity and collision resistance, their application is limited by their high material consumption and construction costs. Hollow piers, on the other hand, use less material and are lighter, but their collision resistance is relatively poor.

[0005] Single-leg thin-walled hollow piers and double-leg thin-walled hollow piers are commonly used pier types in continuous rigid frame bridges. Single-leg thin-walled hollow piers suffer from excessively large peak negative bending moments when responding to longitudinal deformation, compromising bridge safety. Double-leg thin-walled hollow piers are more adaptable to longitudinal deformation, but as the pier height increases, their cross-sectional dimensions also increase, resulting in increased thrust stiffness and failing to meet the bridge's deformation requirements.

[0006] In response to the above problems, existing patent technologies have proposed some solutions to a certain extent, but there are still some shortcomings. For example, the utility model patent with application number 201620873926.6, "A high pier of a continuous rigid frame bridge", although it has improved the material consumption and deadweight, is still insufficient in terms of stability and anti-collision performance for high-pier and long-span continuous rigid frame bridges with piers usually over 100 meters. The patent with application number 202321349997.2, "A pier of a continuous rigid frame bridge", although it has improved the stability and deformation requirements, has failed to take into account the anti-collision performance. And the patent with application number 202220567416.1, "A double-limb thin-walled hollow composite pier", although it has improved the shortcomings of conventional single piers and can effectively reduce the cracking problem at the pier-beam consolidation point and the pier bottom, is still insufficient in terms of stability and anti-collision performance. Utility Model Content

[0007] The purpose of the utility model is to provide a high pier for a long-span continuous rigid frame bridge which significantly improves stability, load-bearing capacity and anti-collision capability while meeting the requirements of lightweight and deformation.

[0008] The high pier of the large-span continuous rigid frame bridge provided by the utility model comprises a double-limb pier body, a single-limb pier body, a single-column pier body and a pedestal which are connected end to end from top to bottom; the top of the double-limb pier body is consolidated with the bottom of the main beam of the continuous rigid frame bridge; the double-limb pier body and the single-limb pier body are both hollow thin-walled structures, and the two pier bodies of the double-limb pier body are connected by a tie beam.

[0009] In one embodiment of the above-mentioned high bridge pier, the double-limb pier body is composed of two pier bodies with the same cross-sectional structure, and both pier bodies are rectangular thin-walled hollow piers.

[0010] In one embodiment of the above-mentioned high bridge pier, the two pier bodies of the double-limb pier body are connected by a cross tie beam, and a plurality of cross tie beams are evenly distributed along the height direction of the double-limb pier body.

[0011] In one embodiment of the above-mentioned high bridge pier, the cross tie beam is formed by two tie beams crossing each other at an inclined angle, and a triangle is formed when the cross tie beam is connected to the two pier bodies of the double-leg pier body.

[0012] In one embodiment of the above-mentioned high bridge pier, the single-column pier body is a solid pier.

[0013] In one embodiment of the above-mentioned high bridge pier, one of the double-limb pier bodies is a multi-chamber thin-walled hollow pier with an even number of chambers or a single-chamber thin-walled hollow pier.

[0014] In one embodiment of the above-mentioned high bridge pier, the single-limb pier body is a multi-chamber thin-walled hollow pier with an even number of chambers or a single-chamber thin-walled hollow pier.

[0015] In one embodiment of the above-mentioned high bridge pier, the cross-sections of the double-limb pier body, the single-limb pier body and the single-column pier body are all rectangular.

[0016] In one embodiment of the above-mentioned high bridge pier, the cross-sectional dimensions of the double-limb pier body, the single-limb pier body and the single-column pier body are the same.

[0017] The beneficial effects of the utility model are as follows:

[0018] 1. The double-legged pier, which is lightweight and has a large allowable deformation, is located on the upper part of the pier, effectively reducing the pier's weight and its thrust-resistance stiffness along the bridge direction, meeting the deformation requirements of high-pier, long-span continuous rigid frame bridges. At the same time, the use of tie beams to connect the two piers of the double-legged pier improves the pier's stability.

[0019] 2. Placing the single-column pier, which has strong load-bearing and collision resistance capabilities, at the bottom of the pier not only improves the overall load-bearing performance of the bridge, but also enhances its collision resistance.

[0020] 3. Installing a single-leg pier between the double-leg pier and the single-column pier can adjust the stiffness and strength of the pier, ensuring uniform stress on the pier, reducing potential damage caused by uneven stress and extending its service life.

[0021] 4. Both the double-leg pier and the single-leg pier adopt a thin-walled hollow structure, which effectively reduces material consumption, lowers construction costs, and reduces the weight of the pier. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural diagram of an embodiment of the present utility model.

[0023] Figure 2 for Figure 1 Schematic diagram of the cross section at AA in the middle.

[0024] Figure 3 for Figure 1 Schematic diagram of the cross section at the middle BB.

[0025] Figure 4 for Figure 1 Schematic diagram of the cross section at CC.

[0026] Description of the marks in the figure:

[0027] 1-Double-leg pier, 2-Single-leg pier, 3-Single-column pier, 4-Pedestal, 5-Cross tie beam. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the relevant technical solutions. Obviously, the embodiments described are only some embodiments, not all 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.

[0029] like Figure 1 As shown, the high pier of the large-span continuous rigid frame bridge disclosed in this embodiment includes a double-leg pier body 1, a single-leg pier body 2, a single-column pier body 3, a cap 4 and a cross tie beam 5.

[0030] The various components of the bridge pier are connected end to end in the following order from top to bottom: double-leg pier body 1, single-leg pier body 2, single-column pier body 3 and foundation 4.

[0031] The double-limb pier body 1 is a double-limb thin-walled hollow pier body. The top of the double-limb pier body is consolidated with the bottom of the main beam of the continuous rigid frame bridge, which can make the pier's anti-thrust stiffness along the bridge direction smaller and can meet the deformation requirements of high-pier and long-span continuous rigid frame bridges.

[0032] like Figure 2 As shown, the double-limb pier body 1 is composed of two pier bodies with the same cross-sectional structure, and the pier bodies are both rectangular thin-walled hollow piers. The rectangular thin-walled hollow pier can be a single-chamber thin-walled hollow pier ( Figure 2 a), double-chamber thin-walled hollow pier ( Figure 2 b) Four-chamber thin-walled hollow pier ( Figure 2 c) etc.

[0033] The two piers of the double-leg pier 1 are connected by a cross tie beam 5, which is evenly distributed along the height of the double-leg pier, improving the stability of the pier structure. The cross tie beams are formed by two tie beams that cross at an angle. When connected to the two piers of the double-leg pier, the cross tie beams form a triangle, further improving the stability of the pier structure.

[0034] The single-limb pier body 2 is a single-limb thin-walled hollow pier body. The top of the single-limb pier body is connected to the bottom of the double-limb pier body 1, and the bottom of the single-limb pier body is connected to the top of the single-column pier body 3.

[0035] like Figure 3 As shown, the single-limb pier body is composed of a rectangular thin-walled hollow pier, which can be a single-chamber thin-walled hollow pier ( Figure 3 a), double-chamber thin-walled hollow pier ( Figure 3 b) Four-chamber thin-walled hollow pier ( Figure 3 c) etc.

[0036] Both the double-limb pier 1 and the single-limb pier 2 adopt a thin-walled hollow structure, which can reduce material consumption, lower construction costs, and reduce the weight of the pier.

[0037] like Figure 4 As shown, the single-column pier body 3 is a rectangular solid pier, and the bottom of the single-column pier body 3 is consolidated with the pedestal 4. By arranging the solid pier at the lower part of the bridge pier, the bridge pier can be provided with excellent load-bearing performance and anti-collision performance.

[0038] The single-leg pier body 2 is arranged between the double-leg pier body 1 and the single-column pier body 3, so that the rigidity and strength of the pier can be adjusted and the force on the pier can be evenly distributed.

[0039] The cross sections of the double-limb pier 1, the single-limb pier 2 and the single-column pier 3 are all rectangular and have the same cross-sectional dimensions.

[0040] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although detailed descriptions have been made with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalent features for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A high pier for a long-span continuous rigid frame bridge, characterized by: It includes double-limb pier, single-limb pier, single-column pier and cap which are connected end to end from top to bottom. The top of the double-leg pier is consolidated with the bottom of the main beam of the continuous rigid frame bridge; both the double-leg pier and the single-leg pier are hollow thin-walled structures, and the two piers of the double-leg pier are connected by a tie beam.

2. The high pier of a long-span continuous rigid frame bridge according to claim 1, characterized in that: The double-limb pier body is composed of two pier bodies with the same cross-sectional structure, and both pier bodies are rectangular thin-walled hollow piers.

3. The high pier of a long-span continuous rigid frame bridge according to claim 2, characterized in that: The two pier bodies of the double-limb pier body are connected by a cross tie beam, and a plurality of cross tie beams are evenly distributed along the height direction of the double-limb pier body.

4. The high pier of a long-span continuous rigid frame bridge according to claim 3, characterized in that: The cross tie beam is formed by obliquely crossing two tie beams, and a triangle is formed when the cross tie beam is connected to the two pier bodies of the double-limb pier body.

5. The high pier of a long-span continuous rigid frame bridge according to claim 1, characterized in that: The single-column pier body is a solid pier.

6. The high pier of a long-span continuous rigid frame bridge according to claim 1, characterized in that: One of the double-limb pier bodies is a multi-chamber thin-wall hollow pier with an even number of chambers or a single-chamber thin-wall hollow pier.

7. The high pier of a long-span continuous rigid frame bridge according to claim 1, characterized in that: The single-limb pier body is a multi-chamber thin-wall hollow pier with an even number of chambers or a single-chamber thin-wall hollow pier.

8. The high pier of a long-span continuous rigid frame bridge according to claim 1, characterized in that: The cross sections of the double-limb pier, the single-limb pier and the single-column pier are all rectangular.

9. The high pier of a long-span continuous rigid frame bridge according to claim 1, characterized in that: The cross-sectional dimensions of the double-limb pier, the single-limb pier and the single-column pier are the same.

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