Novel oval bridge pier

Abstract

The utility model relates to a novel oval pier which comprises an oval pier abutment and a pier column arranged above the oval pier abutment, a groove is formed in the center of the top of the pier abutment, a plurality of positioning key grooves are formed in the groove bottom of the groove, and the pier column is inserted into the groove. Positioning keys in one-to-one correspondence with the positioning key grooves are arranged at the bottom of the pier column; a damping support is arranged at the bottom of the abutment. The pier abutment in the pier adopts a unique oval section design, the proportion of a long shaft to a short shaft is flexibly adjusted according to different water flow conditions, and the impact force of water flow on the pier can be effectively reduced. In torrential water flow and flood periods, water flow can bypass the bridge pier more smoothly due to the large ratio of the long axis to the short axis, vortexes and scour are remarkably reduced, the damage risk of flood to the bridge pier is reduced, and therefore the service life of the bridge is prolonged, and the maintenance cost is reduced. And in a water flow gentle area, other performances can be considered by a proper proportion, and the balance of the overall performance is realized while the water flow adaptability is ensured.

Description

Technical Field

[0001] This utility model relates to the field of bridge engineering technology, specifically to a novel elliptical bridge pier. Background Technology

[0002] Existing bridge piers are generally cylindrical, which are subject to significant impact from flowing water, especially during floods, making them susceptible to severe erosion and damage, greatly affecting the bridge's service life and safety. Traditional pier-column connections are simple and unreliable, lacking efficient seismic design specifically for bridge piers, or employing relatively limited seismic measures. To address this, this invention provides a novel elliptical bridge pier with improved mechanical properties, a stable and reliable connection, reduced water flow impact, superior seismic performance, and a long service life. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a new type of elliptical bridge pier with improved mechanical properties, stable and reliable connection, reduced water flow impact force, good seismic performance, and long service life.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0005] A novel elliptical bridge pier includes an elliptical pier platform and a pier column disposed on top of it. A groove is formed at the center of the top of the pier platform, and multiple positioning keyways are provided at the bottom of the groove. The pier column is inserted into the groove, and a positioning key corresponding to each positioning keyway is provided at the bottom of the pier column. A shock-absorbing support is provided at the bottom of the pier platform.

[0006] As one embodiment of this utility model, the shock-absorbing support includes a high-elasticity core layer, a transition damping layer and a wear-resistant protective layer arranged sequentially from top to bottom. The high-elasticity core layer is made of natural rubber, the transition damping layer is made of a blend of nitrile rubber and chlorinated polyethylene, and the wear-resistant protective layer is made of a composite material of neoprene rubber and polyurethane.

[0007] In one embodiment of this utility model, the thickness of the high-elasticity core layer is 30-50mm, the thickness of the transition damping layer is 10-20mm, and the thickness of the wear protection layer is 5-10mm.

[0008] In one embodiment of this utility model, the gap between the lower part of the pier and the groove is filled with epoxy structural adhesive.

[0009] In one embodiment of this utility model, the positioning keyway is provided on the positioning block, the bottom of multiple positioning blocks is connected to the same first connecting ring, the positioning block and the first connecting ring are embedded in the pier, and the upper surface of the positioning block is flush with the bottom of the groove.

[0010] In one embodiment of this utility model, the tops of the plurality of positioning keys are connected to the same second connecting ring via connecting columns. The positioning keys and the second connecting ring are pre-embedded inside the pier column, and the bottom of the positioning keys is flush with the bottom surface of the pier column.

[0011] In one embodiment of this utility model, both the positioning keyway and the positioning key are dovetail-shaped.

[0012] In one embodiment of this utility model, both the groove and the pier are cylindrical; the plurality of positioning blocks and the plurality of positioning keys are uniformly arranged in a ring.

[0013] In one embodiment of this utility model, the positioning block, the first connecting ring, the positioning key, the connecting post, and the second connecting ring are all made of metal.

[0014] In one embodiment of this utility model, the shock-absorbing support is installed on the foundation, and the top of the pier is connected to the bridge.

[0015] The beneficial effects of adopting the above technical solution are as follows:

[0016] This invention provides a novel elliptical bridge pier. The pier abutment features a unique elliptical cross-section design, allowing for flexible adjustment of the major and minor axis ratios according to different water flow conditions. This effectively reduces the impact of water flow on the pier. During turbulent flow and flood seasons, the larger major-to-minor axis ratio allows water to flow more smoothly around the pier, significantly reducing eddies and scouring, lowering the risk of flood damage, thereby extending the bridge's service life and reducing maintenance costs. In areas with gentle water flow, an appropriate ratio balances other performance characteristics, achieving a balance of overall performance while ensuring adaptability to water flow.

[0017] Elliptical piers improve the problem of uneven distribution of lateral and longitudinal stiffness. Compared with cylindrical piers, they can make the stress distribution of piers more reasonable when subjected to asymmetrical loads or complex load combinations, effectively alleviate local stress concentration, and thus improve the overall stability and load-bearing capacity of the bridge, enhancing the safety of the bridge under various traffic and natural loads.

[0018] The piers and columns are connected by an embedded groove, and precise positioning is achieved by setting a positioning keyway and a positioning key. This prevents circumferential loosening, rotation or displacement between the piers and columns, ensuring effective force transmission, providing strong support for the stability of the bridge structure, and improving the stability and reliability of the connection.

[0019] Installing damping bearings at the bottom of the piers can effectively absorb and disperse seismic energy during an earthquake, reduce the seismic force on the piers, reduce damage to the piers, ensure the structural safety of the bridge, and reduce the impact of earthquake disasters on transportation infrastructure. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the structure of the pier in this utility model.

[0022] Figure 3 This is a schematic diagram of the pier column in this utility model.

[0023] Figure 4 This is a schematic diagram of the positioning block and the first connecting ring in this utility model.

[0024] Figure 5 This is a schematic diagram of the positioning key and the second connecting ring in this utility model.

[0025] The components include: 1. Pier, 2. Groove, 3. Positioning block, 4. Positioning keyway, 5. First connecting ring, 6. Pier column, 7. Positioning key, 8. Connecting column, 9. Second connecting ring, 10. High elasticity core layer, 11. Transition damping layer, and 12. Wear-resistant protective layer. Detailed Implementation

[0026] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be clearly and completely described below in conjunction with specific embodiments.

[0027] like Figures 1-3 The illustration shows a novel elliptical bridge pier, comprising an elliptical pier platform 1 and a pier column 6 positioned above it. A groove 2 is formed at the center of the top of the pier platform 1, and multiple positioning keyways 4 are provided at the bottom of the groove 2. The pier column 6 is inserted into the groove 2, and a positioning key 7 corresponding to each positioning keyway 4 is provided at the bottom of the pier column 6. A vibration damping support is provided at the bottom of the pier platform 1. Both the positioning keyways 4 and the positioning keys 7 are dovetail-shaped and arranged in an inverted trapezoidal shape. The vibration damping support is mounted on the foundation, and the top of the pier column 6 is connected to the bridge.

[0028] The pier 1 adopts a unique elliptical cross-section design. The ratio of its major and minor axes is precisely calculated based on the working location. While meeting the bridge's load-bearing capacity and stability requirements, the size and shape of the pier are optimized to achieve the best mechanical performance. If the river where the bridge is located has a high flow velocity and drastic water level changes during floods, more emphasis should be placed on reducing the impact force of the water flow. The ratio of the major to minor axes can reach 3:1 or even greater, allowing the water flow to bypass the pier more smoothly and reducing eddies and scouring. In relatively calm waters, the ratio of the major to minor axes can be appropriately reduced, such as from 1.5:1 to 2:1, to meet the water flow requirements without excessively sacrificing the pier's performance in other directions.

[0029] like Figure 2 As shown, the shock absorber features a multi-layered composite design using rubber materials, comprising a high-elasticity core layer 10, a transition damping layer 11, and a wear-resistant protective layer 12 arranged sequentially from top to bottom. The high-elasticity core layer 10 provides the main elastic support and deformation capacity; the transition damping layer 11 achieves gradient energy absorption and transfer by adjusting the hardness and damping coefficient of the rubber; the wear-resistant protective layer 12 uses a special rubber formulation with excellent wear resistance, weather resistance, and tear resistance, effectively protecting the internal rubber layers from external environmental erosion and mechanical damage. The high-elasticity core layer 10 is made of natural rubber, the transition damping layer 11 is a blend of nitrile rubber and chlorinated polyethylene, and the wear-resistant protective layer 12 is a composite material of neoprene rubber and polyurethane.

[0030] In this embodiment, the thickness of the high-elasticity core layer 10 is 30-50mm, the thickness of the transition damping layer 11 is 10-20mm, and the thickness of the wear protection layer 12 is 5-10mm.

[0031] As a further optimization, the gap between the lower part of the pier 6 and the groove 2 is filled with epoxy structural adhesive, which has high strength, high adhesion and good weather resistance.

[0032] like Figure 4 As shown, in this embodiment, the positioning keyway 4 is set on the positioning block 3, and the bottom of multiple positioning blocks 3 is connected to the same first connecting ring 5. The positioning block 3 and the first connecting ring 5 are pre-embedded inside the pier 1 when the pier 1 is poured, and the upper surface of the positioning block 3 is flush with the bottom of the groove 2.

[0033] like Figure 5 As shown, the tops of the multiple positioning keys 7 are connected to the same second connecting ring 9 via connecting columns 8. The positioning keys 7 and the second connecting ring 9 are pre-embedded inside the pier 6 during the casting of the pier 6, and the bottom of the positioning keys 7 is flush with the bottom surface of the pier 6.

[0034] In this embodiment, both the groove 2 and the support column 6 are cylindrical; the multiple positioning blocks 3 and multiple positioning keys 7 are uniformly arranged in a ring.

[0035] The positioning block 3, the first connecting ring 5, the positioning key 7, the connecting post 8, and the second connecting ring 9 are all made of metal, preferably carbon steel or stainless steel.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A new type of elliptical pier characterized in that: It includes the elliptical pier (1) and the pier column (6) arranged above it, the recess (2) is arranged at the top center of the pier (1), a plurality of positioning key grooves (4) are arranged at the groove bottom of the recess (2), the pier column (6) is inserted into the recess (2), and the pier column (6) is provided with a positioning key (7) corresponding to the positioning key groove (4); the bottom of the pier (1) is provided with a shock absorbing support.

2. A new type of elliptical pier according to claim 1, characterized by: The shock absorbing support includes a high elasticity core layer (10), a transition damping layer (11) and a wear-resistant protective layer (12) arranged in sequence from top to bottom, the high elasticity core layer (10) is made of natural rubber material, the transition damping layer (11) is made of a blend of nitrile rubber and chlorinated polyethylene, and the wear-resistant protective layer (12) is made of a composite material of neoprene and polyurethane.

3. A new type of elliptical pier according to claim 2, characterized by: The thickness of the high elasticity core layer (10) is 30-50mm, the thickness of the transition damping layer (11) is 10-20mm, and the thickness of the wear-resistant protective layer (12) is 5-10mm.

4. A new type of elliptical pier according to claim 1, characterized in that: The gap between the lower part of the pier column (6) and the recess (2) is filled with epoxy structural adhesive.

5. A new type of elliptical pier according to claim 1, characterized in that: The positioning key groove (4) is arranged on the positioning block (3), a plurality of the positioning block (3) bottoms are connected with the same first connecting ring (5), the positioning block (3) and the first connecting ring (5) are pre-buried in the interior of the pier (1), and the upper surface of the positioning block (3) is flush with the groove bottom of the recess (2).

6. A novel elliptical pier as claimed in claim 5, wherein: The top of a plurality of the positioning key (7) is connected with the same second connecting ring (9) through the connecting column (8), the positioning key (7) and the second connecting ring (9) are pre-buried in the interior of the pier column (6), and the bottom of the positioning key (7) is flush with the bottom surface of the pier column (6).

7. A novel elliptical pier as claimed in claim 6, wherein: The positioning key groove (4) and the positioning key (7) are both dovetail type.

8. A new type of elliptical pier according to claim 6, characterized by: The recess (2) and the pier column (6) are both cylindrical; a plurality of the positioning block (3) and a plurality of the positioning key (7) are both annular and uniformly arranged.

9. A new type of elliptical pier according to claim 6, characterized by: The positioning block (3), the first connecting ring (5), the positioning key (7), the connecting column (8) and the second connecting ring (9) are all metal materials.

10. A new type of elliptical pier according to claim 1, characterized by: The shock absorbing support is arranged on the foundation, and the top of the pier column (6) is connected with the bridge.

Images