Prefabricated bridge pier cap connection structure and construction method

Abstract

The present invention discloses a prefabricated bridge pier cap connection structure and construction method, comprising a cap and a pier. The cap has a plurality of first through-holes on its upper surface that are in direct correspondence with grouting sleeves embedded therein. A first connecting plate is fixedly connected to the cap's upper surface. The first connecting plate has a plurality of second through-holes on its upper surface that are in direct correspondence with the first through-holes. A grouting material container with a top opening is fixedly connected to the upper surface of the first connecting plate. The grouting material container contains grouting material. The lower surface of the pier has an annular groove that matches the grouting material container and a container groove that matches the first connecting plate. The pier reinforcement on the pier passes through the second through-holes and the first through-hole in sequence and is then inserted into the grouting sleeve. The grouting material container is inserted into the annular groove, and the first connecting plate is fitted with the container groove. The present invention improves the connection strength between the pier and the cap and the seismic performance of the prefabricated bridge.

Description

Technical Field

[0001] The present invention belongs to the technical field of prefabricated bridge construction, and in particular relates to a prefabricated bridge pier column and abutment connection structure and a construction method. Background Art

[0002] In recent years, prefabricated bridges have gained widespread acclaim for their low-carbon, environmentally friendly, and efficient construction, leading to their widespread application. Prefabricated bridges utilize factory-manufactured piers, beams, and other structures that are assembled and connected on-site, allowing the foundation to be constructed simultaneously with prefabricated components, thereby shortening construction timelines and improving project quality.

[0003] The connection form between the piers and abutments of prefabricated bridges determines the construction quality and progress of the prefabricated bridges. The traditional connection technology currently used is only through grouting sleeves. However, a large number of indoor tests and engineering experience have shown that the connection strength and seismic performance of conventional grouting sleeves are weaker than cast-in-place. The connection between the abutment and the pier is often the first to be damaged. The specifications also make clear provisions that the grouting sleeve connection is only applicable in seismic fortification zones with degrees 6 and 7. This makes the grouting sleeve connection have great limitations and urgently needs to be improved. Summary of the Invention

[0004] In response to the problems existing in the prior art, the present invention provides a prefabricated bridge pier and abutment connection structure and construction method, which greatly improves the connection strength between the pier and the abutment and improves the seismic performance of the prefabricated bridge.

[0005] In order to solve the above technical problems, the present invention is implemented through the following technical solutions:

[0006] The pier cap connection structure of an assembled bridge comprises a cap and a pier, the upper surface of the cap being provided with a plurality of first through holes which are connected one-to-one with the grouting sleeves embedded therein, the upper surface of the cap being fixedly connected with a first connecting plate, the upper surface of the first connecting plate being provided with a plurality of second through holes which are connected one-to-one with the first through holes, the upper surface of the first connecting plate being fixedly connected with a grouting material receiving barrel with a top opening, the grouting material receiving barrel containing grouting material, the lower surface of the pier being provided with an annular groove which matches the grouting material receiving barrel and a receiving groove which matches the first connecting plate, the pier steel bars on the pier being sequentially passed through the second through holes and the first through holes and then inserted into the grouting sleeve, the grouting material receiving barrel being inserted into the annular groove, and the first connecting plate being fitted with the receiving groove.

[0007] Furthermore, a plurality of anchor bars are embedded in the pedestal, each of the anchor bars is connected to the pedestal steel mesh embedded in the pedestal, the top of each anchor bar is connected to an internal threaded sleeve, the upper surface of the pedestal and the upper surface of the first connecting plate are provided with a plurality of fourth through holes that are connected one-to-one with the internal threaded sleeves, and the first connecting plate is fixed to the upper surface of the pedestal by a screw threadedly connected to the internal threaded sleeves through the fourth through holes on the upper surface of the first connecting plate.

[0008] Furthermore, it also includes a second connecting plate, which is pre-buried inside the base, and is provided with a plurality of third through holes that are connected to the grouting sleeves one by one, and a fifth through hole for the anchor bars to pass through. The pier steel bars on the pier pass through the second through hole, the first through hole and the third through hole in sequence and are inserted into the grouting sleeve, and the anchor bars pass through the fifth through hole accordingly.

[0009] Furthermore, the outer surface of the anchor bar is provided with threads.

[0010] Furthermore, each anchor bar is welded and fixed to the cap steel mesh embedded in the cap.

[0011] Furthermore, the grouting material holding bucket is fixed at the center position of the first connecting plate.

[0012] Furthermore, the grouting material holding barrel is welded and fixed to the first connecting plate.

[0013] Furthermore, the grouting material is concrete slurry.

[0014] A construction method for an assembled bridge pier cap connection structure, comprising:

[0015] Cast the pedestal so that the upper surface of the pedestal is reserved with several first through holes that are connected to the grouting sleeves embedded in it one by one. After the pedestal is cast, the first connecting plate is fixed to the upper surface of the pedestal, the grouting material holding barrel with a top opening is fixed to the upper surface of the first connecting plate, and grouting material is added to the grouting material holding barrel; cast the pier column so that the lower surface of the pier column is reserved with an annular groove matching the grouting material holding barrel and a holding groove matching the first connecting plate, the pier column steel bars on the pier column are passed through the second through holes and the first through holes in turn and then inserted into the grouting sleeve, the grouting material holding barrel is inserted into the annular groove on the lower surface of the pier column, the first connecting plate is fitted with the holding groove, the grouting material in the grouting material holding barrel is squeezed, flows out of the grouting material holding barrel and fills the connection gap between the pedestal and the pier column.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] The present invention provides an assembled bridge pier column and abutment connection structure, which utilizes a first connecting plate to be fixedly connected to the abutment, a grouting material holding barrel to be fixedly connected to the first connecting plate, the grouting material holding barrel to be inserted into the annular groove on the pier column, and the first connecting plate 3 to fit the holding groove 19, thereby increasing the steel structure connection between the abutment and the pier column. At the same time, when the pier column is lowered, the grouting material in the grouting material holding barrel can be squeezed out, and the squeezed grouting material can fill the connection between the abutment and the pier column, effectively reducing damage to the connection between the abutment and the pier column, greatly improving the connection strength between the pier column and the abutment, and improving its seismic performance. The present invention provides a construction method for an assembled bridge pier column and abutment connection structure, which is simple to operate, convenient for construction, and precise to control.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the specific embodiments. Obviously, the drawings described below are 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.

[0020] Figure 1 This is a partial perspective structural diagram of a cap in an assembled bridge pier cap connection structure according to the present invention;

[0021] Figure 2 This is a schematic diagram of the installation of the second connecting plate in an assembled bridge pier cap connection structure of the present invention;

[0022] Figure 3 This is a schematic diagram of a cap poured after completion in an assembled bridge pier cap connection structure according to the present invention;

[0023] Figure 4 This is a schematic diagram of the installation of the first connecting plate in an assembled bridge pier cap connection structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the coordination of anchor bars, internally threaded sleeves, and screw rods in an assembled bridge pier cap connection structure according to the present invention;

[0025] Figure 6 This is a schematic diagram of the coordination between anchor bars and internally threaded sleeves in a prefabricated bridge pier cap connection structure according to the present invention;

[0026] Figure 7 This is a schematic diagram of the screw rod matching in an assembled bridge pier cap connection structure of the present invention;

[0027] Figure 8 This is a schematic diagram of a prefabricated pier in an assembled bridge pier cap connection structure according to the present invention;

[0028] Figure 9 This is a schematic diagram of the completed installation of an assembled bridge pier and cap connection structure according to the present invention.

[0029] In the figure: 1-cap; 2-pier; 3-first connecting plate; 4-grouting sleeve; 5-first through hole; 6-second through hole; 7-grouting material receiving barrel; 8-annular groove; 9-grouting material; 10-pier steel bar; 11-second connecting plate; 12-third through hole; 13-anchor bar; 14-cap steel mesh; 15-inner threaded sleeve; 16-fourth through hole; 17-screw; 18-PVC pipe; 19-receiving groove. DETAILED DESCRIPTION

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0031] As a specific embodiment of the present invention, Figure 1 、 Figure 3 、 Figure 4 、 Figure 8 and Figure 9 As shown, a prefabricated bridge pier cap connection structure includes a cap 1 and a pier 2. A plurality of first through holes 5 are reserved on the upper surface of the cap 1 and are connected to the grouting sleeves 4 embedded therein. A first connecting plate 3 is fixedly connected to the upper surface of the cap 1. A plurality of second through holes 6 are opened on the upper surface of the first connecting plate 3 and are connected to the first through holes 5. In other words, the second through holes 6, the first through holes 5 and the grouting sleeves 4 are all arranged one by one to facilitate the insertion of the pier reinforcement 10 on the pier 2. Figure 4 As shown, a grouting material container 7 with an open top is fixedly connected to the upper surface of the first connecting plate 3, and grouting material 9 is contained in the grouting material container 7. Preferably, the grouting material container 7 is fixed at the center of the first connecting plate 3. Figure 8 As shown, the lower surface of the pier column 2 is reserved with an annular groove 8 that matches the grouting material container 7 and a receiving groove 19 that matches the first connecting plate 3. In other words, the grouting material container 7 can be inserted into the annular groove 8, and the first connecting plate 3 can fit into the receiving groove 19. The pier column reinforcement 10 on the pier column 2 passes through the second through hole 6 and the first through hole 5 in sequence and is then inserted into the grouting sleeve 4. The grouting material container 7 is inserted into the annular groove 8. The overall structure after installation is as shown in FIG. Figure 9 In this embodiment, the first connecting plate 3 is a steel plate, the grouting material holding barrel 7 is a steel structure barrel, the grouting material holding barrel 7 is welded and fixed to the first connecting plate 3, and the grouting material 9 is concrete slurry.

[0032] Specifically, after the pedestal 1 and the pier 2 are installed and matched, the grouting material 9 in the grouting material receiving barrel 7 is squeezed out by the pier 2, filling the connection between the pedestal 1 and the pier 2, effectively slowing down the damage to the connection between the pedestal and the pier. At the same time, the first connecting plate 3 is fixedly connected to the pedestal 1, the grouting material receiving barrel 7 is fixedly connected to the first connecting plate 3, the grouting material receiving barrel 7 is inserted into the annular groove 8 on the pier 2, and the first connecting plate 3 fits into the receiving groove 19, realizing the connection with the steel structure of the pier 2 and increasing the steel-concrete connection of the pedestal pier.

[0033] On the basis of the above embodiment, as a more preferred embodiment of the present invention, Figure 2 、 Figure 5 、 Figure 6 and Figure 7 As shown, a plurality of anchor bars 13 are embedded in the pedestal 1, and each anchor bar 13 is connected to the pedestal reinforcement mesh 14 embedded in the pedestal 1. That is, before the pedestal 1 is cast, the anchor bars 13 are connected to the pedestal reinforcement mesh 14 embedded in the pedestal 1. Preferably, each anchor bar 13 is welded and fixed to the pedestal reinforcement mesh 14 embedded in the pedestal 1, and the outer surface of the anchor bar 13 is provided with a thread, so that the anchor bar 13 on the threaded surface can better combine with the concrete. An internal threaded sleeve 15 is connected to the top of each anchor bar 13, and a plurality of fourth through holes 16 are provided on the upper surface of the pedestal 1 and the upper surface of the first connecting plate 3, which are connected to the internal threaded sleeve 15 one by one. That is, the fourth through holes 16 are arranged opposite to the internal threaded sleeve 15, and the first connecting plate 3 is fixed to the upper surface of the pedestal 1 by a screw 17 threadedly connected to the internal threaded sleeve 15 and inserted from the fourth through holes 16 on the upper surface of the first connecting plate 3. In this embodiment, the anchor bar 13 fixedly connected to the base steel mesh 14, the internal threaded sleeve 15 connected to the anchor bar 13, and the screw 17 threadedly matched with the internal threaded sleeve 15 work together to reliably fix the first connecting plate 3 on the base 1, thereby improving the reliability of the pier base connection.

[0034] On the basis of the above embodiment, as a more preferred embodiment of the present invention, Figure 1As shown, a second connecting plate 11 is also pre-embedded within the pier cap 1. The second connecting plate 11 is provided with a plurality of third through holes 12 that are directly connected to the grouting sleeves 4. A fifth through hole is also provided for the passage of anchor bars 13. The pier column reinforcement bars 10 on the pier column 2 are sequentially passed through the second through holes 6, the first through holes 5, and the third through holes 12 before being inserted into the grouting sleeve 4. The anchor bars 13 are correspondingly passed through the fifth through holes. In other words, the pre-embedded second connecting plate 11 better positions the pier column reinforcement bars 10 and the anchor bars 13, further facilitating the reliability of the overall connection of the pier cap. In this embodiment, the second connecting plate 11 is a steel plate.

[0035] The present invention provides a construction method for an assembled bridge pier cap connection structure, which is specifically as follows:

[0036] Place the second connecting plate 11 on the pedestal reinforcement mesh 14, set the grouting sleeve 4, pass the anchor bar 13 through the fifth through hole on the second connecting plate 11, weld the anchor bar 13 to the pedestal reinforcement mesh 14, and before pouring the pedestal 1, insert the PVC pipe 18 into the grouting sleeve 4 so that the PVC pipe 18 extends out of the third through hole 12 on the second connecting plate 11 to prevent concrete from flowing into the grouting sleeve 4. Pour the pedestal 1 so that a number of first through holes 5 are reserved on the upper surface of the pedestal 1 that are in direct connection with the grouting sleeve 4 embedded therein. After the pedestal 1 is poured, fix the first connecting plate 3 to the upper surface of the pedestal 1 by threading the screw 17 with the internal threaded sleeve 15, fix the grouting material container 7 with the top opening on the upper surface of the first connecting plate 3, and add grouting material 9 into the grouting material container 7. Cast the pier 2 so that the lower surface of the pier 2 is reserved with an annular groove 8 that matches the grouting material receiving barrel 7 and a receiving groove 19 that matches the first connecting plate 3. The pier steel bar 10 on the pier 2 is passed through the second through hole 6, the first through hole 5 and the third through hole 12 in sequence and then inserted into the grouting sleeve 4. The grouting material receiving barrel 7 is inserted into the annular groove 8 on the lower surface of the pier 2, and the first connecting plate 3 is fitted with the receiving groove 19. After the grouting material 9 in the grouting material receiving barrel 7 is squeezed, it flows out of the grouting material receiving barrel 7 and fills the connection gap between the base 1 and the pier 2.

[0037] Finally, it should be noted that the above-described embodiments are only specific implementations of the present invention, which are used to illustrate the technical solutions of the present invention, rather than to limit them. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the above-described embodiments, those skilled in the art should understand that any person skilled in the art can modify or easily conceive of changes to the technical solutions described in the above-described embodiments within the technical scope disclosed by the present invention, or replace some of the technical features therein with equivalents. Such modifications, changes, or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. An assembled bridge pier cap connection structure, characterized in that: The invention comprises a pedestal (1) and a pier (2), wherein the upper surface of the pedestal (1) is reserved with a plurality of first through holes (5) which are in direct correspondence with the grouting sleeves (4) embedded therein, the upper surface of the pedestal (1) is fixedly connected with a first connecting plate (3), the upper surface of the first connecting plate (3) is provided with a plurality of second through holes (6) which are in direct correspondence with the first through holes (5), the upper surface of the first connecting plate (3) is fixedly connected with a grouting material receiving barrel (7) with a top opening, the grouting material receiving barrel (7) The barrel (7) contains grouting material (9), and the lower surface of the pier column (2) is reserved with an annular groove (8) matching the grouting material containing barrel (7) and an accommodating groove (19) matching the first connecting plate (3). The pier column reinforcement (10) on the pier column (2) passes through the second through hole (6) and the first through hole (5) in sequence and is inserted into the grouting sleeve (4). The grouting material containing barrel (7) is inserted into the annular groove (8), and the first connecting plate (3) is fitted with the accommodating groove (19); A plurality of anchor bars (13) are embedded in the pedestal (1), each anchor bar (13) is connected to a pedestal steel mesh (14) embedded in the pedestal (1), and the top of each anchor bar (13) is connected to an internal threaded sleeve (15). The upper surface of the pedestal (1) and the upper surface of the first connecting plate (3) are both provided with a plurality of fourth through holes (16) that are in direct correspondence with the internal threaded sleeves (15). The first connecting plate (3) is fixed to the upper surface of the pedestal (1) by inserting a screw (17) threadedly connected to the internal threaded sleeves (15) through the fourth through holes (16) on the upper surface of the first connecting plate (3); It also includes a second connecting plate (11), the second connecting plate (11) is pre-buried in the base (1), a plurality of third through holes (12) are provided on the second connecting plate (11) and are connected to the grouting sleeves (4) one by one, and a fifth through hole is provided for the anchor bar (13) to pass through, the pier column steel bar (10) on the pier column (2) passes through the second through hole (6), the first through hole (5) and the third through hole (12) in sequence and is then inserted into the grouting sleeve (4), and the anchor bar (13) passes through the fifth through hole accordingly; The outer surface of the anchor bar (13) is provided with threads.

2. The assembled bridge pier cap connection structure according to claim 1, characterized in that: Each anchor bar (13) is welded and fixed to a cap steel mesh (14) pre-buried in the cap (1).

3. The assembled bridge pier cap connection structure according to claim 1, characterized in that: The grouting material holding barrel (7) is fixed at the center of the first connecting plate (3).

4. The assembled bridge pier cap connection structure according to claim 1, characterized in that: The grouting material holding barrel (7) is fixed to the first connecting plate (3) by welding.

5. The assembled bridge pier cap connection structure according to claim 1, characterized in that: The grouting material (9) is concrete slurry.

6. The construction method of a prefabricated bridge pier cap connection structure according to any one of claims 1 to 4, characterized in that: include: Casting the pedestal (1) so that the upper surface of the pedestal (1) is reserved with a plurality of first through holes (5) that are in direct communication with the grouting sleeves (4) embedded therein. After the pedestal (1) is cast, the first connecting plate (3) is fixed to the upper surface of the pedestal (1), the grouting material receiving barrel (7) with a top opening is fixed to the upper surface of the first connecting plate (3), and grouting material (9) is added to the grouting material receiving barrel (7); casting the pier column (2) so that the lower surface of the pier column (2) is reserved with an annular groove that matches the grouting material receiving barrel (7). (8) and a receiving groove (19) matching the first connecting plate (3), the pier column steel bar (10) on the pier column (2) is sequentially passed through the second through hole (6) and the first through hole (5) and then inserted into the grouting sleeve (4), the grouting material receiving barrel (7) is inserted into the annular groove (8) on the lower surface of the pier column (2), the first connecting plate (3) is fitted with the receiving groove (19), and the grouting material (9) in the grouting material receiving barrel (7) is squeezed and flows out of the grouting material receiving barrel (7) to fill the connection gap between the base (1) and the pier column (2).

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