Spliced pier

Abstract

The utility model discloses a spliced bridge pier. The spliced bridge pier comprises a cover beam, a pier column and a base which are sequentially arranged from top to bottom. The pier column is of a hollow column type structure and comprises a plurality of hollow sections, and the adjacent sections are connected through UHPC wet joints. According to the utility model, a multi-segment spliced structure is adopted, the adjacent segments are connected by adopting the UHPC wet joints, and the UHPC material has good compression resistance, tensile property, adhesive property and working performance, so that the size of the wet joints can be effectively reduced, the stress of the joints is improved, and the construction is convenient; compared with the conventional cast-in-place height, the height of a single section in the pier column is smaller, the weight of the section is lighter, the pier column is more beneficial to transportation and installation, the use amount of structural materials is reduced, the construction cost is lower, and the pier column is suitable for bridge high pier assembly construction and has wide popularization and application prospects.

Description

TECHNICAL FIELD

[0001] The utility model relates to bridge engineering field, more specifically, especially relate to a spliced bridge pier. BACKGROUND

[0002] At present, the prefabricated assembly technology of bridge superstructure in China is relatively mature, and the superstructure of small and medium span bridges basically adopts assembly construction. For the substructure, the prefabricated assembly technology is in the exploratory stage, and some conditional city bridges, sea-crossing bridges and highway bridges gradually carry out the application and research of prefabricated assembly pier technology. However, due to the current technology, the prefabricated assembly pier is basically applied to lower piers, and cannot be applied to high piers, and the cost of prefabricated pier is generally higher than that of cast-in-place construction pier. The main technical limitations at present are: the joint structure is relatively complex or the construction is relatively difficult, which leads to the height of single segment being too large, the weight of segment being large, and the transportation and installation being inconvenient; in addition, the pier mostly adopts dry joint or cement joint, grouting sleeve connecting steel bar technology, which has high construction requirements, high cost and difficult control of verticality of high pier column. SUMMARY

[0003] The utility model provides a spliced bridge pier to solve the problem in above -mentioned background art. In order to realize above -mentioned purpose, the utility model provides the following technical scheme: a spliced bridge pier, including the bent cap, pier column and base arranged in turn from top to bottom, the pier column is hollow column structure, including a plurality of internal hollow segments, the UHPC wet joint is connected between adjacent segments, prestressed reinforcement pipe is equipped on the segment, and prestressed reinforcement is arranged in the prestressed reinforcement pipe, the butt joint of two prestressed reinforcement pipes between adjacent two segments is connected through the buckling type connecting sleeve, and the adjacent two prestressed reinforcements are connected through the connector.

[0004] Preferably, the number of pier columns is two, and the two pier columns are connected through the cross beam; the cross beam is a prefabricated concrete member, and the end thereof is connected with the pier column through the UHPC wet joint.

[0005] Preferably, the pier column is a circular pipe column structure, and the cross section thereof is circular; the cross beam is connected with the segments on the pier column; the interior of the segment butt joint with the cross beam is a solid structure, and the solid structure is provided with a pre-embedded steel member, and the pre-embedded steel member is connected with the cross beam.

[0006] Preferably, the cross beam is provided with a pre-embedded steel sleeve, the pre-embedded steel sleeve is butt jointed with the pre-embedded steel member, a connecting angle steel is arranged between the pre-embedded steel sleeve and the pre-embedded steel member, one side of the connecting angle steel is welded with the pre-embedded steel sleeve, and the other side is welded with the pre-embedded steel member.

[0007] Preferably, the pier is a box column structure with a square cross section; the cross beam is connected to the segments on the pier; the segments that are connected to the cross beam are hollow inside; the cross beam comprises two beam plates, the ends of which are connected to the corresponding segments.

[0008] Preferably, the segments at the top of the pier are provided with a top steel plate, on which a top solid segment is connected, and the top solid segment is pre-buried with a top connecting steel bar; the prestressed thick steel bars on the segments at the top of the pier extend into the bent cap and are connected thereto, and the top connecting steel bar extends into the bent cap and is connected thereto.

[0009] Preferably, the segments at the bottom of the pier are provided with a bottom solid segment, on which a bottom steel plate is pre-buried; the base is connected to the segments at the bottom of the pier by a cast-in-situ concrete wet joint; the base is pre-buried with a bottom connecting steel bar and a bottom prestressed steel bar, the connecting steel bar is connected to the bottom steel plate, and the bottom prestressed steel bar is connected to the prestressed thick steel bars on the segments at the bottom of the pier.

[0010] Preferably, the segments are provided with an inner ring reinforcement layer and an outer ring reinforcement layer; the inner ring reinforcement layer comprises a plurality of inner longitudinal bars and a plurality of inner stirrups, the plurality of inner longitudinal bars are arranged in a circumferential array structure, and the inner stirrups are circular rings, the surfaces of which are connected to the inner longitudinal bars; the outer ring reinforcement layer comprises a plurality of outer longitudinal bars and a plurality of outer stirrups, the plurality of outer longitudinal bars are arranged in a circumferential array structure, and the outer stirrups are circular rings, the surfaces of which are connected to the outer longitudinal bars.

[0011] Compared with the prior art, the utility model has the advantages that: the utility model has reasonable design and simple structure, the adjacent segments are connected by UHPC wet joints, the UHPC material has good compression resistance, tensile resistance, bonding performance and working performance, can effectively reduce the size of the wet joint, improve the stress of the joint, and is convenient for construction; compared with the conventional cast-in-situ height, the height of a single segment in the pier of the utility model is smaller, the weight of the segment is lighter, transportation and installation are more convenient, the amount of structural material is saved, the engineering cost is lower, the utility model is suitable for bridge high pier assembly construction, and has wide popularization and application prospect. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a front view of the spliced bridge pier of the utility model;

[0013] Figure 2 It is a side view of the spliced bridge pier of the utility model;

[0014] Figure 3Front view of another embodiment (box column type structure) of the utility model;

[0015] Figure 4 Side view of another embodiment (box column type structure) of the utility model;

[0016] Figure 5 The cross beam mounting structure schematic diagram of the spliced bridge pier of the utility model is shown in the figure;

[0017] Figure 6 The cross beam mounting structure schematic of another embodiment (box column type structure) of the utility model is shown in the figure;

[0018] Figure 7 The structure schematic diagram of the segment of the spliced bridge pier of the utility model is shown in the figure;

[0019] Figure 8 The connection structure schematic diagram between the segments of the spliced bridge pier of the utility model is shown in the figure;

[0020] Figure 9 The segment and cross beam connection structure schematic diagram of the spliced bridge pier of the utility model is shown in the figure;

[0021] Figure 10 The segment and cross beam connection structure schematic diagram of another embodiment (box column type structure) of the utility model is shown in the figure;

[0022] In Figures 1 to 10 The correspondence between the names of various components and the figure numbers is as follows:

[0023] 1 - bent cap, 2 - pier column, 21 - segment, 2101 - inner longitudinal reinforcement, 2102 - inner stirrup, 2103 - outer longitudinal reinforcement, 2104 - outer stirrup, 22 - UHPC wet joint, 23 - prestressed steel pipe, 24 - prestressed coarse steel bar, 25 - snap-fit connecting sleeve, 26 - connector, 27 - embedded steel member, 28 - top steel plate, 29 - top solid segment, 3 - base, 4 - cross beam, 41 - embedded steel sleeve, 42 - beam plate, 5 - connecting angle steel. DETAILED DESCRIPTION

[0024] The embodiments of the utility model will be further described in detail below in combination with the drawings and examples, and the accompanying drawings are only for reference and are not used to limit the embodiments of the disclosure. The following examples are used to illustrate the utility model, but cannot be used to limit the scope of the utility model.

[0025] In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more than two;The orientation or position relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0026] In the description of the utility model, it should be pointed out that, unless otherwise specified and limited, the terms "connected", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected;It can be mechanically connected, or it can be electrically connected;It can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0027] Please refer to Figures 1 to 10 The utility model provides a spliced bridge pier, including from top to bottom in proper order cover beam 1, pier column 2 and base 3, the pier column 2 is hollow column structure, it includes a plurality of inside hollow section 21, adjacent section 21 between using UHPC wet joint 22 connects, be equipped with prestressed reinforcement pipeline 23 on section 21, be equipped with prestressed reinforcement 24 in prestressed reinforcement pipeline 23, two prestressed reinforcement pipelines 23 between adjacent two sections 21 are docked through buckling type connecting sleeve 25, and two adjacent prestressed reinforcements 24 are connected through connector 26.

[0028] In the embodiment of the utility model, the bridge pier is composed of cast-in-place base 3, prefabricated pier column 2 and cast-in-place cover beam 1. Among them, the pier column 2 is a hollow column structure, and the pier column 2 can adopt a circular pipe column or a box column according to the stress requirement, each pier column 2 includes a plurality of sections 21 connected by concrete prefabrication, the sections 21 are connected by UHPC wet joint 22, and the prestressed reinforcement 24 is arranged to improve the bearing capacity of the pier column 2. When the prestressed reinforcement needs to be lengthened, the two adjacent prestressed reinforcements 24 are connected by the connector 26.

[0029] Specifically, the splicing combination between two segments 21 is completed through a UHPC wet joint 22, and UHPC is used as the connecting material in the embodiment, compared with traditional concrete pouring. Because UHPC uses fine aggregate, high-grade cement, superfine high-activity mineral admixture, micro-bead superfine powder, and special organic chemical additives, and the like, a multiple filling effect is generated in the UHPC structure system, a dense structure is formed, micro defects are reduced, the internal micro-pore structure is greatly optimized, and thus super-high mechanical properties, durability, and construction performance are achieved. The performance of the connecting joint made of UHPC material is higher, and can reach 140-160 MPa. In addition, the brittleness of the base material can be improved and the toughness can be improved by adding steel fibers or various engineering fibers in the UHPC material.

[0030] In the embodiment, the segment 21 is a hollow structure, and a plurality of prestressed steel pipe channels 23 are arranged on the side wall of the segment 21, and a prestressed reinforcing bar 24 is arranged in each prestressed steel pipe channel 23. Between two adjacent segments 21, the prestressed steel pipe channels 23 on the two segments 21 are arranged in one-to-one correspondence, and the two prestressed steel pipe channels 23 are connected through a snap-fit connecting sleeve 25. The snap-fit connecting sleeve 25 is easy to install, and can quickly splice the two prestressed steel pipe channels 23. Before the sleeve connection, the prestressed reinforcing bars 24 in the prestressed steel pipe channels 23 need to be connected with the prestressed reinforcing bars 24 on the adjacent segments 21, and the two prestressed reinforcing bars 24 that need to be lengthened are connected through a connector 26.

[0031] Preferably, the number of the pier columns 2 is two, and the two pier columns 2 are connected through the cross tie beam 4. The cross tie beam 4 is a prefabricated concrete member, and the end thereof is connected with the pier column 2 through the UHPC wet joint 22. In the embodiment, when two or more than two bridge piers are arranged, the cross tie beam 4 is used to connect the adjacent pier columns 2 in the horizontal direction. The cross tie beam 4 is also a prefabricated concrete member, and the end thereof is connected with the side surface of the pier column 2 through the wet joint made of UHPC material.

[0032] Preferably, the pier column 2 is a circular pipe column structure, and the cross section thereof is circular. The cross tie beam 4 is connected with the segment 21 on the pier column 2. The inside of the segment 21 connected with the cross tie beam 4 is a solid structure, and a pre-embedded steel member 27 is arranged on the solid structure, and the pre-embedded steel member 27 is connected with the cross tie beam 4. In the embodiment, the entire pier column 2 is a cylindrical structure, that is, the cross section thereof is a circular structure. Because more contact points are needed at the joint of the curved surface structure, the inside of the corresponding segment 21 is a solid structure, and the pre-embedded steel member 27 is arranged in the solid structure, and the pre-embedded steel member 27 is connected with the cross tie beam 44, and then the same wet joint is used to strengthen the joint.

[0033] Preferably, the cross beam 4 is provided with a pre-embedded steel sleeve 41, which is connected with the pre-embedded steel member 27, and a connecting angle steel 5 is arranged between the pre-embedded steel sleeve 41 and the pre-embedded steel member 27, one side of the connecting angle steel 5 is welded with the pre-embedded steel sleeve 41, and the other side is welded with the pre-embedded steel member 27. Through the above structural design, the cross beam 4 and the corresponding segment 21 are welded by the connecting angle steel 5, which facilitates the construction of wet connection and further improves the connection strength. The cross section of the connecting angle steel 5 in the embodiment is L-shaped structure, one side of the L-shaped structure is welded with the pre-embedded steel member 27, and the other side is welded with the pre-embedded steel sleeve 41 on the cross beam 4.

[0034] Preferably, the pier column 2 is a box column structure with a square cross section, the cross beam 4 is connected with the segment 21 on the pier column 2, the segment 21 connected with the cross beam 4 is a hollow structure, and the cross beam 4 includes two beam plates 42, the ends of the beam plates 42 are connected with the corresponding segments 21. In the embodiment, the pier column 2 is a box column structure with a square cross section, in which structure, the contact surface of the segment 21 and the cross beam 4 is large, and a solid segment does not need to be arranged to maintain stable connection effect.

[0035] Preferably, the segment 21 at the top of the pier column 2 is provided with a top steel plate 28, the top steel plate 28 is connected with a top solid segment 29, and a top connecting steel bar is pre-embedded in the top solid segment 29; the pre-stressed coarse steel bar 24 on the segment 21 at the top of the pier column 2 extends into the bent cap 1 and is connected with the bent cap 1, and the top connecting steel bar extends into the bent cap 1 and is connected with the bent cap 1.

[0036] In the embodiment, the pier column 2 is composed of multiple segments 21, one of which at the top is provided with a top steel plate 28, and a top solid segment 29 is arranged on the top steel plate 28, and a top connecting steel bar is pre-embedded in the top solid segment 29 to connect with the bent cap 1. The top connecting steel bar is inserted into the bent cap 1 and fixedly connected with the bent cap 1.

[0037] Preferably, the segment 21 at the bottom of the pier column 2 is provided with a bottom solid segment, a bottom steel plate is pre-embedded on the bottom solid segment; the base 3 is connected with the segment 21 at the bottom of the pier column 2 by a cast-in-place concrete wet joint; a bottom connecting steel bar and a bottom pre-stressed steel bar are pre-embedded in the base 3, the connecting steel bar is connected with the bottom steel plate, and the bottom pre-stressed steel bar is connected with the pre-stressed coarse steel bar 24 on the segment 21 at the bottom of the pier column 2.

[0038] In the embodiment, the one segment 21 at the bottom, which internally has the bottom solid segment, is embedded with a bottom steel plate in the bottom solid segment so as to butt joint the connecting steel bars on the base 3, and the bottom prestressed steel bars on the base 3 are butt jointed with the corresponding prestressed steel bars 24 on the segment 21.

[0039] Preferably, the segment 21 is internally provided with an inner ring reinforcement layer and an outer ring reinforcement layer; the inner ring reinforcement layer comprises a plurality of inner longitudinal bars 2101 and a plurality of inner hoop bars 2102, the plurality of inner longitudinal bars 2101 are distributed in a circumferential array structure, and the inner hoop bars 2102 are circular ring structures, the surfaces of which are connected with the inner longitudinal bars 2101; the outer ring reinforcement layer comprises a plurality of outer longitudinal bars 2103 and a plurality of outer hoop bars 2104, the plurality of outer longitudinal bars 2103 are distributed in a circumferential array structure, and the outer hoop bars 2104 are circular ring structures, the surfaces of which are connected with the outer longitudinal bars 2103. In the embodiment, the inner ring reinforcement layer and the outer ring reinforcement layer are respectively arranged on the inner side and the outer side of the segment 21 to jointly clamp the prestressed steel pipe 23, forming a three-layer structure, and the concrete is poured between the layers. Through the above structure design, the structural strength of the segment 21 is effectively improved, so that the hollow segment 21 with the hollow interior can also withstand greater pressure, the length of the segment 21 is controlled, and the installation and transportation are more convenient.

[0040] Compared with the prior art, the utility model has the advantages of reasonable design, simple structure, and the like, the adjacent segments are connected through UHPC wet joints, the UHPC material has good compression resistance, tensile resistance, bonding performance and working performance, can effectively reduce the size of the wet joint, improve the stress of the joint, and is convenient for construction, the height of a single segment in the pier column is smaller, the weight of the segment is lighter, transportation and installation are more convenient, the amount of structural material is saved, the engineering cost is lower, the utility model is suitable for bridge high pier assembly construction, and has wide popularization and application prospect.

[0041] The embodiments of the utility model are given for example and description, and are not exhaustive or limit the utility model to the disclosed forms. Many modifications and changes are obvious to those skilled in the art. The embodiments are selected and described for better illustrating the principles and practical application of the utility model, and enabling those skilled in the art to understand the utility model so as to design various embodiments with various modifications suitable for specific purposes.

Claims

1. A type of spliced ​​bridge pier, characterized in that, It includes a cap beam (1), a pier (2) and a base (3) arranged sequentially from top to bottom; the pier is a hollow column structure, which includes several hollow segments (21), and adjacent segments are connected by UHPC wet joints (22); the segments are provided with prestressed steel pipes (23), and the prestressed steel pipes are provided with prestressed steel bars (24); the two prestressed steel pipes between two adjacent segments are connected by snap-fit ​​connecting sleeves (25), and the two adjacent prestressed steel bars are connected by connectors (26).

2. The spliced ​​bridge pier according to claim 1, characterized in that, The number of piers is two, and the two piers are connected by a crossbeam (4); the crossbeam is a precast concrete component, and its end is connected to the pier by a UHPC wet joint.

3. The spliced ​​bridge pier according to claim 2, characterized in that, The pier column is a circular tube column structure with a circular cross section; the transverse beam is connected to the segment on the pier column; the segment that connects with the transverse beam has a solid internal structure and is provided with a pre-embedded steel component (27), which is connected to the transverse beam.

4. The spliced ​​bridge pier according to claim 3, characterized in that, The transverse beam is provided with a pre-embedded steel sleeve (41), which is connected to the pre-embedded steel component. A connecting angle steel (5) is provided between the two. One side of the connecting angle steel is welded to the pre-embedded steel sleeve, and the other side is welded to the pre-embedded steel component.

5. The spliced ​​bridge pier according to claim 2, characterized in that, The pier is a box column structure with a square cross section; the transverse tie beam is connected to the segment on the pier; the segment connected to the transverse tie beam has a hollow interior; the transverse tie beam includes two tie beam plates (42), and the ends of the tie beam plates are connected to the corresponding segments.

6. The spliced ​​bridge pier according to claim 1, characterized in that, The segment at the top of the pier is provided with a top steel plate (28), and a top solid segment (29) is connected to the top steel plate. A top connecting steel bar is embedded in the top solid segment. The prestressed thick steel bar on the segment at the top of the pier extends into the cap beam and is connected to the cap beam. The top connecting steel bar extends into the cap beam and is connected to the cap beam.

7. The spliced ​​bridge pier according to claim 1, characterized in that, The segment at the bottom of the pier has a solid bottom section, on which a bottom steel plate is pre-embedded; the base is connected to the segment at the bottom of the pier by a cast-in-place concrete wet joint; the base has pre-embedded bottom connecting steel bars and bottom prestressed steel bars, the connecting steel bars are connected to the bottom steel plate, and the bottom prestressed steel bars are connected to the prestressed steel bars on the segment at the bottom of the pier.

8. The spliced ​​bridge pier according to any one of claims 1 to 7, characterized in that, The segment is provided with an inner ring reinforcing rib layer and an outer ring reinforcing rib layer; the inner ring reinforcing rib layer includes multiple inner longitudinal ribs (2101) and multiple inner stirrups (2102), the multiple inner longitudinal ribs are distributed in a circumferential array structure, the inner stirrups are circular ring structures, and their surfaces are connected to the inner longitudinal ribs; the outer ring reinforcing rib layer includes multiple outer longitudinal ribs (2103) and multiple outer stirrups (2104), the multiple outer longitudinal ribs are distributed in a circumferential array structure, the outer stirrups are circular ring structures, and their surfaces are connected to the outer longitudinal ribs.

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