Prefabricated segment assembled double-column pier

Abstract

The utility model provides a prefabricated segment assembled double-column pier. The prefabricated segment assembled double-column pier comprises a bearing platform, a cover beam and two parallel prefabricated segment piers, the lower ends of the two prefabricated segment bridge piers are installed on the bearing platform, and the upper ends of the two prefabricated segment bridge piers are installed on the cover beam. The prefabricated segment pier comprises a plurality of concrete segments which are sequentially connected in a stacked mode in the height direction. According to the utility model, through the design of the double prefabricated segment piers, the earthquake load can be effectively shared, the deviation risk of a single column pier under the earthquake action is reduced, the double prefabricated segment pier is suitable for various geological conditions, a flexible solution is provided for bridge construction, and the double prefabricated segment pier is particularly suitable for being used in a high-intensity earthquake area; by factory-like processing of the concrete sections and on-site splicing, the construction period of the bridge pier can be shortened, environmental pollution and traffic interference on the construction site are reduced, the requirement for environmental protection is met, and remarkable economic and social benefits are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of precast segment assembled piers, and particularly relates to a precast segment assembled double-column pier. Background Art

[0002] With the acceleration of the urbanization process and the growth of traffic infrastructure demand, bridge construction is facing challenges such as tight construction periods, complex construction environments, and high environmental protection requirements. To address these challenges, the precast and assembled pier technology has emerged and gradually become an important construction method in bridge construction.

[0003] The precast and assembled pier technology significantly improves construction efficiency and component quality by factory processing pier components and using technical means such as prestressed connection, socket connection, and grouting corrugated pipes for assembly on site. This method can shorten the construction period, reduce environmental pollution and traffic interference at the construction site, and has significant economic and social benefits.

[0004] Existing precast segment assembled piers with prestressed connections are mostly single-column designs; for example, the patent with the publication number CN112900246B discloses a new type of precast segment assembled pier and its assembly method. The assembled pier includes a bottom pile cap integrated with the bottom segment of the pier, precast pier segments, and a capping beam; the precast concrete pier body includes a bottom segment, intermediate segments, and a top segment in sequence from top to bottom. Among them, the bottom segment is integrally cast with the bottom pile cap; the top segment is connected to the capping beam by circumferential welding of a steel plate with shear studs.

[0005] However, under the action of horizontal seismic loads, the piers of this single-column design are prone to displacement, especially at the joints of the bottom segments. Due to the concentration of concrete stress, local crushing may occur, affecting the structural safety of the piers. Therefore, the current single-column prestressed assembled piers have deficiencies in seismic performance, which limits their application in high-intensity earthquake areas. Summary of the Utility Model

[0006] Aiming at the above problems existing in the prior art, the technical problem to be solved by the utility model is that the current single-column prestressed assembled piers have deficiencies in seismic performance, which limits their application in high-intensity earthquake areas.

[0007] To solve the above technical problems, the utility model adopts the following technical scheme: a precast segment assembled double-column pier, comprising: a pile cap, a capping beam, and two mutually parallel precast segment piers; the lower ends of the two precast segment piers are installed on the pile cap, and the upper ends of the two precast segment piers are installed on the capping beam; the precast segment pier includes a plurality of concrete segments stacked and connected in sequence in the height direction.

[0008] Preferably, it further includes unbonded prestressed tendons; both ends of the unbonded prestressed tendons are respectively installed on the pile cap and the capping beam; prestressed tendon ducts are provided in the height direction of each concrete segment, and the unbonded prestressed tendons sequentially penetrate through multiple concrete segments through the prestressed tendon ducts.

[0009] Preferably, both ends of the unbonded prestressed tendons are respectively installed on the pile cap and the capping beam through anchor devices.

[0010] Preferably, each concrete segment is provided with multiple prestressed tendon ducts, and each prestressed tendon duct is provided with an unbonded prestressed tendon.

[0011] Preferably, adjacent two concrete segments are connected by shear keys.

[0012] Preferably, the capping beam and the precast segmental bridge pier are connected by shear keys.

[0013] Preferably, there are multiple shear keys, and multiple shear keys are provided in two mutually perpendicular directions.

[0014] Preferably, two socket grooves corresponding to the precast segmental bridge piers are provided at the upper end of the pile cap; the bottom concrete segment is inserted into the socket grooves, and the gap between the concrete segment and the socket grooves is filled with UHPC grouting material.

[0015] Preferably, the bottom concrete segment is made of UHPC material.

[0016] Preferably, multiple concrete segments are hollow.

[0017] Compared with the prior art, the utility model has at least the following advantages:

[0018] 1. In the utility model, through the design of double precast segmental bridge piers, the seismic load can be effectively shared, the deviation risk of a single-column pier under earthquake action is reduced, it is applicable to various geological conditions, provides a flexible solution for bridge construction, and is especially suitable for use in high-intensity earthquake areas.

[0019] 2. In the utility model, by prefabricating concrete segments in a factory and assembling them on site, the construction period of the bridge pier can be shortened, environmental pollution and traffic interference at the construction site can be reduced, which meets the environmental protection requirements and has significant economic and social benefits.

[0020] 3. In the utility model, by using unbonded prestressed tendons to connect multiple concrete segments into a whole, the integrity and stability of the precast segmental bridge pier are improved. This connection method reduces the prestress loss and enhances the seismic resistance of the bridge pier.

[0021] 4. In the present utility model, through the arrangement of shear keys, it is possible to effectively prevent the dislocation between two adjacent concrete segments, further improving the structural safety of the precast segment pier.

[0022] 5. In the present utility model, the gap is filled with UHPC grout, ensuring the tightness and strength of the connection between the bottom concrete segment and the bearing platform, and adjusting the construction error, simplifying the on-site construction process.

[0023] 6. In the present utility model, by using UHPC material (ultra-high performance concrete) in the bottom concrete segment and grout, it is possible to improve the strength and durability of the bottom concrete segment, increasing the self-centering ability of the pier. Description of the Drawings

[0024] In order to more clearly illustrate the specific embodiments of the present utility model, the drawings required for the specific embodiments will be briefly introduced below. In all the drawings, the elements or parts are not necessarily drawn to actual scale.

[0025] Figure 1 This is the front view of the precast segment assembled double-column pier provided in the embodiment of the present utility model.

[0026] Figure 2 This is the partial enlarged view of the precast segment assembled double-column pier provided in the embodiment of the present utility model.

[0027] Figure 3 This is the front view of the concrete segment provided in the embodiment of the present utility model.

[0028] Figure 4 This is the top view of the concrete segment provided in the embodiment of the present utility model.

[0029] Reference Numerals: 1 - Bearing platform, 2 - Capping beam, 3 - Concrete segment, 4 - Unbonded prestressing tendon, 5 - Prestressing tendon duct, 6 - Anchor, 7 - Shear key, 8 - Shear groove, 9 - Socket groove, 10 - UHPC grout. Detailed Embodiments

[0030] The embodiments of the technical solution of the present utility model will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present utility model, so they are only examples and cannot be used to limit the protection scope of the present utility model.

[0031] In the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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. Therefore, it should not be construed as a limitation to the present utility model.

[0032] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] See Figures 1 - 4 , the embodiments provided by the present utility model: a precast segment assembled double-column pier, comprising: a pile cap 1, a capping beam 2 and two precast segment piers parallel to each other; the lower ends of the two precast segment piers are installed on the pile cap 1, and the upper ends of the two precast segment piers are installed on the capping beam 2; the precast segment pier includes a plurality of concrete segments 3 stacked and connected in the height direction in sequence; further, the plurality of concrete segments 3 are provided in a hollow shape; thereby, the weight of the concrete segments 3 can be reduced, which is convenient for transportation, and materials can be saved, and the production cost can be reduced.

[0034] During specific implementation, through the design of the double precast segment piers, the seismic load can be effectively shared, the deviation risk of the single-column pier under earthquake action can be reduced, it is applicable to various geological conditions, and a flexible solution for bridge construction is provided, especially suitable for use in high-intensity earthquake areas; by factory processing the concrete segments 3 and assembling them on site, the construction period of the pier can be shortened, the environmental pollution and traffic interference at the construction site can be reduced, which meets the environmental protection requirements, and has significant economic and social benefits.

[0035] See Figures 1 - 4, in other embodiments, it further includes unbonded prestressed tendons 4; both ends of the unbonded prestressed tendons 4 are respectively installed on the pile cap 1 and the capping beam 2; prestressed tendon ducts 5 are provided in the height direction of each concrete segment 3, and the unbonded prestressed tendons 4 pass through a plurality of concrete segments 3 in sequence through the prestressed tendon ducts 5. Specifically in implementation, by using the unbonded prestressed tendons 4 to connect a plurality of concrete segments 3 into a whole, the integrity and stability of the precast segmental bridge pier are improved. This connection method reduces the prestress loss and enhances the seismic resistance of the bridge pier. Further, each concrete segment 3 is provided with a plurality of prestressed tendon ducts 5, and each prestressed tendon duct 5 is provided with an unbonded prestressed tendon 4; thereby further improving the integrity and stability of the precast segmental bridge pier, reducing the prestress loss, and enhancing the seismic resistance of the bridge pier.

[0036] See Figures 1 - 4 , in other embodiments, both ends of the unbonded prestressed tendons 4 are respectively installed on the pile cap 1 and the capping beam 2 through anchor devices 6. Specifically in implementation, the lower end of the unbonded prestressed tendon 4 penetrates through the pile cap 1 and is fixed at the bottom of the pile cap 1 by using the anchor device 6; the upper end of the unbonded prestressed tendon 4 penetrates through the capping beam 2, and the unbonded prestressed tendon 4 is tensioned. After the tensioning is completed, the upper end of the capping beam 2 is anchored by using the anchor device 6.

[0037] See Figures 1 - 4 , in other embodiments, two adjacent concrete segments 3 are connected by shear keys 7. Specifically in implementation, a shear key groove 8 matching with the shear key 7 is provided at the upper end of each concrete segment 3; except for the bottom concrete segment 3, a shear key 7 is provided at the lower end of each concrete segment 3 to connect a plurality of concrete segments 3 in sequence; through the setting of the shear keys 7, the dislocation between two adjacent concrete segments 3 can be effectively prevented, and the structural safety of the precast segmental bridge pier is further improved. Further, the capping beam 2 and the precast segmental bridge pier are connected by shear keys 7. A shear key 7 is provided at the lower end of the capping beam 2, thereby effectively preventing the dislocation between the capping beam 2 and the precast segmental bridge pier. Further, a plurality of shear keys 7 are provided, and a plurality of shear keys 7 are provided in two mutually perpendicular directions; thereby preventing the dislocation between two adjacent concrete segments 3 from two mutually perpendicular directions.

[0038] See Figures 1 - 4, in another embodiment, two socket grooves 9 corresponding to the precast segment piers are formed at the upper end of the bearing platform 1; the concrete segment 3 at the bottom is inserted into the socket groove 9, and the gap between the concrete segment 3 and the socket groove 9 is filled with UHPC grouting material 10. During specific implementation, the gap between the concrete segment 3 and the socket groove 9 is 30 to 50 mm, and the depth of the socket groove 9 is 50% of the cross-sectional length of the bottom concrete segment 3. By inserting the bottom concrete segment 3 into the bearing platform 1 and then filling the gap with the UHPC grouting material 10, the tightness and strength of the connection between the bottom concrete segment 3 and the bearing platform 1 are ensured, the construction error is adjusted, and the on-site construction process is simplified. Further, the bottom concrete segment 3 is made of UHPC material; by using UHPC material (ultra-high performance concrete) in the bottom concrete segment 3 and the grouting material, the strength and durability of the bottom concrete segment 3 can be improved, and the self-centering ability of the pier is increased.

[0039] The connection process is as follows: Insert the concrete segment 3 made of UHPC material at the bottom into the socket groove 9 on the bearing platform 1, and fill the gap between the concrete segment 3 and the socket groove 9 with UHPC grouting material 10; then, insert the remaining concrete segments 3 into the adjacent shear grooves 8 through the shear keys 7 in sequence, and then insert the shear keys 7 on the capping beam 2 into the shear grooves 8 on the top concrete segment 3; then, pass the unbonded prestressed tendons 4 through the prestressed tendon ducts 5 on the bearing platform 1, the concrete segment 3 and the capping beam 2, and fix them with the anchor devices 6 at the bottom of the bearing platform 1; then, tension the unbonded prestressed tendons 4, and after the tensioning is completed, anchor them with the anchor devices 6 at the upper end of the capping beam 2.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the various embodiments of the present invention, and they should all be covered within the scope of the claims and the description of the present invention.

Claims

1. A prefabricated segment assembled double column pier, characterized in that: include: A pedestal, a cap beam and two mutually parallel prefabricated segmental piers; the lower ends of the two prefabricated segmental piers are installed on the pedestal, and the upper ends of the two prefabricated segmental piers are installed on the cap beam; the prefabricated segmental piers include a plurality of concrete segments stacked and connected in sequence in the height direction.

2. The prefabricated segment assembled double column pier according to claim 1, characterized in that: It also includes unbonded prestressed tendons; the two ends of the unbonded prestressed tendons are respectively installed on the pedestal and the cap beam; a prestressed tendon channel is opened in the height direction of each concrete segment, and the unbonded prestressed tendons pass through multiple concrete segments in sequence through the prestressed tendon channel.

3. The prefabricated segment assembled double column pier according to claim 2, characterized in that: The two ends of the unbonded prestressed tendons are respectively installed on the pedestal and the cap beam through anchors.

4. The prefabricated segment assembled double column pier according to claim 2, characterized in that: Each of the concrete segments is provided with a plurality of prestressed tendon channels, and each of the prestressed tendon channels is provided with unbonded prestressed tendons.

5. The prefabricated segment assembled double column pier according to claim 1, characterized in that: Two adjacent concrete segments are connected via shear keys.

6. The prefabricated segment assembled double column pier according to claim 5, characterized in that: The cap beam and the prefabricated segment pier are connected via shear keys.

7. The prefabricated segment assembled double column pier according to claim 5, characterized in that: The shear keys are provided in plurality, and the plurality of shear keys are provided in plurality in two directions perpendicular to each other.

8. The prefabricated segment assembled double column pier according to claim 1, characterized in that: The upper end of the pedestal is provided with two socket grooves corresponding to the prefabricated segment bridge piers one by one; the concrete segment at the bottom is inserted into the socket grooves, and the gap between the concrete segment and the socket grooves is filled with UHPC grouting material.

9. The prefabricated segment assembled double column pier according to claim 8, characterized in that: The concrete section at the bottom is made of UHPC material.

10. The prefabricated segment assembled double column pier according to claim 1, characterized in that: The plurality of concrete segments are hollow.

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