Fabricated pier rapid construction technology

Abstract

The invention relates to the technical field of bridge erection construction, in particular to a quick construction technology for a fabricated pier. The fabricated pier comprises a plurality of prefabricated pier columns, a plurality of protruding pieces are arranged on the outer side walls of the two ends of each prefabricated pier column, and the prefabricated pier columns are prefabricated parts; the cover beam is used for being arranged at the top of the prefabricated pier column, a first containing cavity is formed in the cover beam, the upper end of the prefabricated pier column extends into the first containing cavity, a first concave-convex structure is arranged on the portion, corresponding to the protruding piece, of the inner side wall of the first containing cavity, and concrete is poured between the first containing cavity and the prefabricated pier column; the bearing platform is used for being arranged at the bottom of the prefabricated pier column, a second containing cavity is formed in the bearing platform, the lower end of the prefabricated pier column extends into the second containing cavity, a second concave-convex structure is arranged on the portion, corresponding to the protruding piece, of the inner side wall of the second containing cavity, and concrete is poured between the second containing cavity and the prefabricated pier column; and the profile steel connecting pieces are connected with the two adjacent prefabricated pier columns.

Description

Technical Field

[0001] The invention relates to the technical field of bridge erection construction, and in particular to a technology for rapid construction of assembled bridge piers. Background Art

[0002] Bridge construction is mainly divided into lower works and upper works. The lower works mainly include three parts: piers, abutments and foundations; the upper works are mainly the main load-bearing structure that crosses obstacles, that is, the beam body. At present, during bridge construction, the upper structure and the lower structure are constructed separately. Usually, the upper structure is constructed after the lower structure is completed.

[0003] In recent years, the construction of bridge superstructures has gradually adopted the method of erecting prefabricated beams using construction equipment such as beam transporters and bridge erection machines to achieve assembly construction. The beam body has been fully industrialized and mechanized. However, the substructure of the bridge is still mainly constructed by cast-in-place, which has a long construction period, is difficult to control the quality of construction, and is easily affected by many external factors. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art that the lower structure of the bridge is mostly constructed in a cast-in-place manner, the construction period is long and it is difficult to control the construction quality, and to provide a rapid construction technology for assembled bridge piers.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] In a first aspect, the present invention provides a prefabricated bridge pier, comprising:

[0007] If the prefabricated pier column is used, the outer side walls at both ends of the prefabricated pier column are provided with a plurality of protrusions, and the prefabricated pier column is a prefabricated component;

[0008] A cap beam, the cap beam is used to be arranged on the top of the prefabricated pier column, the cap beam is provided with a first accommodating cavity, the upper end of the prefabricated pier column extends into the first accommodating cavity, the inner side wall of the first accommodating cavity is provided with a first concave-convex structure corresponding to the protruding piece, and concrete is poured between the first accommodating cavity and the prefabricated pier column;

[0009] A cap, the cap is used to be arranged at the bottom of the prefabricated pier, the cap is provided with a second accommodating cavity, the lower end of the prefabricated pier extends into the second accommodating cavity, the inner side wall of the second accommodating cavity is provided with a second concave-convex structure corresponding to the protruding piece, and concrete is poured between the second accommodating cavity and the prefabricated pier;

[0010] A steel connecting piece is used to connect two adjacent prefabricated piers.

[0011] The number and length of prefabricated piers are determined according to actual conditions.

[0012] The side walls at both ends of the prefabricated pier are provided with protruding pieces, and the two ends of the prefabricated pier extend into the first accommodating cavity of the cap beam and the second accommodating cavity of the pedestal, respectively. The side walls of the first accommodating cavity and the side walls of the second accommodating cavity are provided with the first concave-convex structure and the second concave-convex structure corresponding to the protruding pieces, and concrete is poured inside the first accommodating cavity and the second accommodating cavity, so that a shear key can be formed, which can effectively prevent the prefabricated pier and the cap beam, and the prefabricated pier and the pedestal from slipping, and the shear key can better transfer the load of the cap beam to the prefabricated pier and transfer the load of the prefabricated pier to the pedestal, which is beneficial to improving the structural stability of the pier. Two adjacent prefabricated piers are connected by steel connectors, which is beneficial to improving the structural stability. This device uses prefabricated piers, which is beneficial to reducing the construction cost of the piers, and the prefabricated piers are prefabricated structures, and the steel connectors can also be prefabricated, which can reduce the cast-in-place construction as much as possible, which is beneficial to reducing the construction period and controlling the construction quality.

[0013] Preferably, a group of the steel connecting parts includes two steel sleeves and two main connecting rods. The two steel sleeves are respectively covered with two adjacent prefabricated piers. The main connecting rods are arranged on the outer walls of the steel sleeves. The two adjacent main connecting rods are connected by a splicing plate.

[0014] Two adjacent piers are each covered with a steel sleeve, and the two adjacent piers are connected by a main connecting rod outside the steel sleeve. The steel connector can connect the two adjacent piers into a whole, which is beneficial to improving the integrity of the device, thereby improving the structural strength of the device and improving the stability of the bridge.

[0015] Preferably, when at least two groups of the steel connectors are provided for two adjacent prefabricated piers, the steel connectors are spaced apart along the length direction of the prefabricated piers, wherein the two adjacent groups of steel connectors are connected by an oblique connecting rod, and the angle between the oblique connecting rod and the axial direction of the prefabricated pier is greater than zero.

[0016] The two adjacent piers are also connected by an oblique connecting rod, so the axial force of the oblique connecting rod can be decomposed into a force along the axis of the pier, which is beneficial to improving the structural stability of the device.

[0017] Preferably, the steel connection member further comprises a connecting angle plate, wherein the connecting angle plate is connected to the steel sleeve and the main connecting rod, and the plane where the connecting angle plate is located is parallel to the axis of the steel sleeve.

[0018] Angle plates can be used to stiffen steel connectors, which helps to improve the stability of steel connectors.

[0019] Preferably, both ends of the oblique connecting rod are respectively connected to the connecting angle plates of two adjacent groups of steel connecting pieces.

[0020] The oblique connecting rod is connected to the connecting angle plate, so the force of the oblique connecting rod can be dispersed to the steel sleeve and the main connecting rod, which is beneficial to improving the structural stability of the steel connection.

[0021] Preferably, the protrusion is an annular component arranged on the outer side wall of the prefabricated pier.

[0022] Compared with other forms of protrusions, the annular component of the outer pier column reduces stress concentration and is beneficial to the structural stability of the pier.

[0023] Preferably, the prefabricated piers are pipe piles.

[0024] The inside of the pipe pile is hollow, light in weight, and easy to transport and install; the hollow design makes the pipe pile have higher bending resistance and can better resist lateral loads. In addition, the pipe pile can also be prefabricated in the factory to minimize the impact of cast-in-place on quality.

[0025] In a second aspect, the present invention provides a bridge construction method using a bridge erecting machine, which is used to construct a bridge using a prefabricated bridge pier as described above, comprising the following steps:

[0026] S1, erecting the middle leg of the first bridge erecting machine on the bridge pier No. n, and setting the rear leg on the completed beam, wherein the bridge pier No. n is the frontmost bridge pier currently completed, wherein the first main beam of the first bridge erecting machine protrudes from the designed position of the bridge pier No. n+1, and setting the bridge crane on the first main beam;

[0027] S2, transporting the prefabricated pier column, cap beam and beam body of the No. n+1 pier to be constructed to the bottom of the first main beam by a transport vehicle, wherein the No. n beam body is a beam body whose two ends overlap the No. n pier and the No. n+1 pier respectively, transporting the prefabricated pier column and the cap beam to the designed position by the bridge crane, and installing the prefabricated pier column and the cap beam hole by hole by the cantilever, thereby completing the construction of the No. n+1 pier;

[0028] S3, erecting the front legs on the top surface of the cap beam installed in step S2, transporting the beam body No. n to the designed position by the bridge crane and installing it;

[0029] S4, move the first bridge erecting machine and repeat steps S1 to S3 until the construction of the bridge is completed.

[0030] When the prior art uses a bridge-building machine to construct a bridge, only the beam is transported by the bridge-building machine, and the corresponding piers have been built before the bridge-building machine is erected. However, in this construction method, when the first bridge-building machine is erected, the n+1 pier corresponding to the n beam has not been constructed. Therefore, when the first bridge-building machine is erected in this construction method, the front end of the first bridge-building machine protrudes from the designed position of the n+1 pier, which is convenient for the bridge-building machine to transport and construct the prefabricated piers and cap beams of the n+1 pier. When the construction of the n+1 pier is completed, the front legs of the first bridge-building machine are erected on the n+1 pier, which is convenient for maintaining the balance of the bridge-building machine during the subsequent transportation and installation of the beam. Through the construction method of this method, the piers are directly constructed by the bridge-building machine, which improves the convenience of construction and helps shorten the construction period; and the use of prefabricated piers minimizes the impact on the pier structure.

[0031] Preferably, in step S2, the prefabricated pier column is firstly arranged in the second accommodating cavity, stirrups are arranged in the second accommodating cavity, and concrete is poured in the second accommodating cavity.

[0032] Preferably, when multi-span construction is required, the steps are replaced as follows:

[0033] A1. Erect the second bridge erecting machine and the third bridge erecting machine, one end of the second main beam of the second bridge erecting machine is set at the designed position of the said pier No. n, and the other end protrudes from the designed position of the said pier No. n+x, where x≥2, the legs of the second bridge erecting machine are set at the designed position of the said pier No. n+x, the third main beam of the said third bridge erecting machine is set above the said beam body that has been constructed, and the front end of the said third main beam protrudes from the said pier No. n, and the said bridge crane is set on both the said second main beam and the said third main beam;

[0034] A2. The prefabricated pier columns and cap beams corresponding to the piers n+1 to n+x to be constructed are transported to the bottom of the second main beam by a transport vehicle, and the beam bodies n to n+x-1 are transported to the bottom of the third bridge erection machine by a transport vehicle. The bridge crane installed on the second bridge erection machine transports the prefabricated pier columns and cap beams to the designed position and installs them, thus completing the construction of the piers n+1 to n+x;

[0035] A3, move the second bridge erecting machine forward until the rear end of the second main beam exceeds the design position of the beam body No. n, move the third bridge erecting machine forward, and use the bridge crane on the third bridge erecting machine to transport the beam body No. n to the beam body No. n+x-1 in sequence until the construction of the beam body No. n to the beam body No. n+x-1 is completed;

[0036] A4. Repeat steps A1 to A3 until the construction of the bridge is completed.

[0037] This construction method is suitable for multi-span construction, using a second bridge-erecting machine to serve as beams from n to n+x-1.

[0038] This construction method directly constructs the bridge piers through a bridge erection machine, which improves the convenience of construction and helps shorten the construction period; and uses prefabricated pier columns to minimize the impact on the bridge pier structure.

[0039] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0040] 1. An assembled bridge pier of the present invention comprises a plurality of prefabricated piers, a cap beam, a pedestal and steel connectors. The side walls at both ends of the prefabricated piers are provided with protruding pieces, and the two ends of the prefabricated piers extend into the first accommodating cavity of the cap beam and the second accommodating cavity of the pedestal respectively. The side walls of the first accommodating cavity and the side walls of the second accommodating cavity are provided with first concave-convex structures and second concave-convex structures corresponding to the protruding pieces, and concrete is poured inside the first accommodating cavity and the second accommodating cavity, so that a shear key can be formed, which can effectively prevent slippage between the prefabricated pier and the cap beam, and between the prefabricated pier and the pedestal, and the shear key can better transfer the load of the cap beam to the prefabricated pier and transfer the load of the prefabricated pier to the pedestal, which is beneficial to improving the structural stability of the bridge pier. Two adjacent prefabricated piers are connected by a steel connector, which is beneficial to improving the structural stability. The device adopts prefabricated piers, which is beneficial to reducing the construction cost of the bridge piers. The prefabricated piers are prefabricated structures, and the steel connectors can also be prefabricated, which reduces the cast-in-place construction as much as possible, is beneficial to reducing the construction period and controlling the construction quality, and overcomes the shortcomings of the prior art that the lower structure of the bridge is mostly constructed by cast-in-place, the construction period is long and it is difficult to control the construction quality.

[0041] 2. A bridge construction method using a bridge-erecting machine, when the first bridge-erecting machine is erected, the n+1 pier corresponding to the n beam has not been constructed yet. Therefore, when the first bridge-erecting machine is erected, the front end of the first bridge-erecting machine protrudes from the designed position of the n+1 pier, which is convenient for the bridge-erecting machine to transport and construct the prefabricated pier columns and cap beams of the n+1 pier. When the construction of the n+1 pier is completed, the front legs of the first bridge-erecting machine are erected on the n+1 pier, which is convenient for maintaining the balance of the bridge-erecting machine during the subsequent transportation and installation of the beam. Through the construction method of this method, the piers are directly constructed by the bridge-erecting machine, which improves the convenience of construction and helps shorten the construction period; and the use of prefabricated pier columns minimizes the impact on the pier structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural schematic diagram of an assembled bridge pier of the present invention;

[0043] Figure 2 It is a structural diagram of a prefabricated pier;

[0044] Figure 3 It is a structural diagram of the cap beam;

[0045] Figure 4 It is a structural diagram of the foundation;

[0046] Figure 5 It is a structural schematic diagram of a steel connection piece;

[0047] Figure 6 It is a structural schematic diagram of the oblique connecting rod;

[0048] Figure 7 This is a schematic diagram of the single-span construction process of a bridge construction method using a bridge erection machine. Figure 1 ;

[0049] Figure 8 This is a schematic diagram of the single-span construction process of a bridge construction method using a bridge erection machine. Figure 2 ;

[0050] Fig. 9 It is a schematic diagram of a multi-span construction process of a bridge construction method using a bridge erection machine;

[0051] Icons: 1-prefabricated pier, 101-protruding part, 2-cap beam, 201-first accommodating cavity, 202-grouting hole, 3-capping platform, 301-second accommodating cavity, 4-steel connector, 401-steel sleeve, 402-main connecting rod, 403-splicing plate, 404-oblique connecting rod, 4041-screw hole, 405-connecting angle plate, 406-stiffening rib, 407-high-strength bolt, 5-bridge pier, 6-beam body, 7-first bridge-erecting machine, 8-second bridge-erecting machine, 9-third bridge-erecting machine, 10-bridge crane, 11-transport vehicle, 12-front outrigger, 13-middle outrigger, 14-rear outrigger. DETAILED DESCRIPTION

[0052] The present invention is further described in detail below in conjunction with specific embodiments. However, this should not be understood as the scope of the above subject matter of the present invention being limited to the following embodiments, and all technologies realized based on the content of the present invention belong to the scope of the present invention.

[0053] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or position relationship such as "up", "down", "left", "right", "center", "inside", "outside", etc. are all expressions based on the orientation or position relationship shown in the drawings, or are the orientation or position relationship when the invented product / equipment / device is usually used. These terms of orientation or position relationship are only for the convenience of describing the scheme of the present invention or simplifying the description in the specific embodiments, so as to facilitate the technicians to quickly understand the scheme, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific position relationship, and therefore cannot be understood as a limitation on the present invention.

[0054] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simplified to mean that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", "parallel", etc., and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the scheme of the present invention.

[0055] In addition, the expressions “first”, “second”, “third”, etc., which appear in the terms, are merely used to distinguish the description of the same or similar components and should not be understood as emphasizing or implying the relative importance of specific components.

[0056] In addition, in the description of the embodiments of the present invention, "several", "plurality" and "a number" represent at least 2. It can be any number such as 2, 3, 4, 5, 6, 7, 8, 9, and even more than 9.

[0057] In addition, in the description of the technical solution of the present invention, unless otherwise clearly specified / defined / restricted, the terms "set", "install", "connect", "connected", "provided with", "laid", and "arranged" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, and can be welding, riveting, bolting, threading, and other commonly used connection means in the field. This connection can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements.

[0058] Example 1

[0059] like Figures 1 to 6 As shown, the assembled bridge pier used in this embodiment includes:

[0060] If the prefabricated pier 1 is used, the outer side walls at both ends of the prefabricated pier 1 are provided with a plurality of protrusions 101, and the prefabricated pier 1 is a prefabricated component;

[0061] A cap beam 2, the cap beam 2 is used to be arranged on the top of the prefabricated pier 1, the cap beam 2 is provided with a first accommodating cavity 201, the upper end of the prefabricated pier 1 extends into the first accommodating cavity 201, the inner wall of the first accommodating cavity 201 is provided with a first concave-convex structure corresponding to the protruding piece 101, and concrete is poured between the first accommodating cavity 201 and the prefabricated pier 1;

[0062] A cap 3, the cap 3 is used to be arranged at the bottom of the prefabricated pier 1, the cap 3 is provided with a second accommodating cavity 301, the lower end of the prefabricated pier 1 extends into the second accommodating cavity 301, the inner wall of the second accommodating cavity 301 is provided with a second concave-convex structure corresponding to the protruding piece 101, and concrete is poured between the second accommodating cavity 301 and the prefabricated pier 1;

[0063] A steel connector 4 is used to connect two adjacent prefabricated piers 1 .

[0064] In this embodiment, one bridge pier includes two prefabricated pier columns 1 , and the two prefabricated pier columns 1 are connected using at least two sets of steel connectors 4 .

[0065] The side walls at both ends of the prefabricated pier 1 are provided with protruding pieces 101, and the two ends of the prefabricated pier 1 extend into the first accommodating cavity 201 of the cap beam 2 and the second accommodating cavity 301 of the pedestal 3, respectively. The side walls of the first accommodating cavity 201 and the side walls of the second accommodating cavity 301 are provided with first and second concave-convex structures corresponding to the protruding pieces 101, and concrete is poured inside the first and second accommodating cavities 201 and 301, so that a shear key can be formed, which can effectively prevent slippage between the prefabricated pier 1 and the cap beam 2 and between the prefabricated pier 1 and the pedestal 3, and the shear key can better transfer the load of the cap beam 2 to the prefabricated pier 1 and the load of the prefabricated pier 1 to the pedestal 3, which is beneficial to improving the structural stability of the bridge pier 5. Two adjacent prefabricated piers 1 are connected by a steel connector 4, which is beneficial to improving the structural stability. The device adopts the prefabricated pier column 1, which is beneficial to reducing the construction cost of the bridge pier 5. The prefabricated pier column 1 is a prefabricated structure, and the steel connector 4 can also be prefabricated, which can reduce the cast-in-place construction as much as possible, and is beneficial to reducing the construction period and controlling the construction quality.

[0066] Furthermore, if Figure 5 As shown, a group of the steel connectors 4 includes two steel sleeves 401 and two main connecting rods 402. The two steel sleeves 401 are respectively covered with two adjacent prefabricated piers 1. The main connecting rods 402 are arranged on the outer walls of the steel sleeves 401. The two adjacent main connecting rods 402 are connected by a splicing plate 403.

[0067] Furthermore, if Figure 1 and Figure 5As shown, when at least two groups of the steel connectors 4 are provided at two adjacent prefabricated piers 1, the steel connectors 4 are spaced apart along the length direction of the prefabricated pier 1, wherein the two adjacent groups of steel connectors 4 are connected by an oblique connecting rod 404, and the angle between the oblique connecting rod 404 and the axial direction of the prefabricated pier 1 is greater than zero.

[0068] Furthermore, if Figure 5 As shown, the steel connection member 4 further includes a connection angle plate 405 , and the connection angle plate 405 is connected to the steel sleeve 401 and the main connecting rod 402 , and the plane where the connection angle plate 405 is located is parallel to the axis of the steel sleeve 401 .

[0069] Furthermore, both ends of the oblique connecting rod 404 are respectively connected to the connecting angle plates 405 of two adjacent groups of steel connecting pieces 4. The ends of the oblique connecting rod 404 are provided with screw holes 4041.

[0070] Furthermore, if Figure 3 As shown, the protrusion 101 is an annular component arranged on the outer side wall of the prefabricated pier 1, and the annular component is sheathed around the prefabricated pier 1.

[0071] Furthermore, the prefabricated pier 1 is a pipe pile.

[0072] Example 2

[0073] like Figures 7 to 9 As shown, a bridge construction method using a bridge erecting machine is characterized in that it is used to construct a bridge using an assembled bridge pier as in Example 5, and comprises the following steps:

[0074] S1, erecting the middle leg 13 of the first bridge erecting machine 7 on the bridge pier No. n 5, and setting the rear leg 14 on the completed beam 6, wherein the bridge pier No. n 5 is the frontmost bridge pier 5 currently completed, wherein the first main beam of the first bridge erecting machine 7 protrudes from the designed position of the bridge pier No. n+1 5, and setting the bridge crane 10 on the first main beam;

[0075] S2, transport the prefabricated pier column 1, cap beam 2 and beam body n 6 of the n+1 pier 5 to be constructed to the bottom of the first main beam by means of a transport vehicle 11, wherein the beam body n 6 is a beam body 6 whose two ends overlap the n pier 5 and the n+1 pier 5 respectively, and the bridge crane 10 transports the prefabricated pier column 1 and the cap beam 2 to the designed position, and the cantilever installs the prefabricated pier column 1 and the cap beam 2 hole by hole, thereby completing the construction of the n+1 pier 5;

[0076] S3, erecting the front legs 12 on the top surface of the cap beam 2 installed in step S2, and transporting the nth beam body 6 to the designed position by the bridge crane 10 and installing it;

[0077] S4, move the first bridge erecting machine 7 and repeat steps S1 to S3 until the construction of the bridge is completed.

[0078] In step S2, the single-column pier is hoisted as a whole during construction, and the cap 3 and the prefabricated pier column 1 are connected and constructed. After the connection is completed, the pre-stacked stirrups are arranged at intervals outside the longitudinal reinforcement, and C50 self-compacting concrete is poured outside the prefabricated pier column 1. The box girder can only be erected after the connection between the pier column and the cap 3 has been strengthened for 24 hours. The progress of erecting a single pier and a box girder is 35 hours / 1 beam. During the hoisting construction of the double-column pier, the cap 3 and the prefabricated pier column 1 are connected and constructed, and the prefabricated pier column 1 is connected to the cap beam 2. Both the upper and lower connection parts need to consider the 24-hour strengthening time before the next step of erection can be carried out. The progress of erecting double-column piers and box beams is 63 hours / 1 beam.

[0079] During single span construction, the performance parameters of the bridge erecting machine refer to the following table:

[0080]

[0081]

[0082] When multi-span construction is required, the steps are replaced as follows:

[0083] A1. Erect the second bridge erecting machine 8 and the third bridge erecting machine 9. One end of the second main beam of the second bridge erecting machine 8 is set at the nth bridge pier 5, and the other end protrudes from the designed position of the n+xth bridge pier 5, where x≥2. The legs of the second bridge erecting machine 8 are set at the designed position of the n+xth bridge pier 5. The third main beam of the third bridge erecting machine 9 is set above the completed beam body 6, and the front end of the third main beam protrudes from the nth bridge pier 5. The bridge crane 10 is set on both the second main beam and the third main beam.

[0084] A2, transport the prefabricated pier columns 1 and the cap beams 2 corresponding to the bridge piers n+1 to n+x to be constructed to the bottom of the second main beam by the transport vehicle 11, transport the beam bodies n to n+x-1 to the bottom of the third bridge erection machine 9 by the transport vehicle 11, and the bridge crane 10 installed on the second bridge erection machine 8 transports the prefabricated pier columns 1 and the cap beams 2 to the designed positions and installs them, thus completing the construction of the bridge piers n+1 to n+x;

[0085] A3, move the second bridge erecting machine 8 forward until the rear end of the second main beam exceeds the design position of the No. n beam body 6, and move the third bridge erecting machine 9 forward, and use the bridge crane 10 on the third bridge erecting machine 9 to transport the No. n beam body 6 to the No. n+x-1 beam body 6 in sequence until the construction of the No. n beam body 6 to the No. n+x-1 beam body 6 is completed;

[0086] A4. Repeat steps A1 to A3 until the construction of the bridge is completed.

[0087] In this embodiment, x=3

[0088] In this embodiment, the nth beam body 6 and the nth bridge pier 5 are

[0089] It takes 24 hours to grout each cap beam 2 and prefabricated pier column 1 to reach 35MPa. The progress of erecting single-column piers and box beams is 42 hours / 3 spans. The progress of erecting double-column piers and box beams is 73 hours / 3 spans. Taking into account the on-site working conditions and work breaks, the actual on-site construction time of single-column piers can be calculated as 1.3 days / 1 span, and the actual on-site construction time of double-column piers can be calculated as 1.8 days / 1 span.

[0090] During multi-span construction, the performance parameters of the bridge erection machine refer to the following table:

[0091]

[0092] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An assembled bridge pier, characterized in that: Include: If the prefabricated pier (1) is present, the outer side walls at both ends of the prefabricated pier (1) are provided with a plurality of protrusions (101), and the prefabricated pier (1) is a prefabricated component; A cap beam (2), the cap beam (2) being used to be arranged on the top of the prefabricated pier column (1), the cap beam (2) being provided with a first accommodating cavity (201), the upper end of the prefabricated pier column (1) extending into the first accommodating cavity (201), the inner side wall of the first accommodating cavity (201) being provided with a first concave-convex structure corresponding to the protruding piece (101), and concrete being poured between the first accommodating cavity (201) and the prefabricated pier column (1); A capping platform (3), the capping platform (3) being used to be arranged at the bottom of the prefabricated pier column (1), the capping platform (3) being provided with a second accommodating cavity (301), the lower end of the prefabricated pier column (1) extending into the second accommodating cavity (301), the inner side wall of the second accommodating cavity (301) being provided with a second concave-convex structure corresponding to the protruding piece (101), and concrete being poured between the second accommodating cavity (301) and the prefabricated pier column (1); A steel connecting piece (4), wherein the steel connecting piece (4) connects two adjacent prefabricated piers (1).

2. The assembled bridge pier according to claim 1, characterized in that: A group of the steel connecting parts (4) comprises two steel sleeves (401) and two main connecting rods (402). The two steel sleeves (401) are respectively covered with two adjacent prefabricated piers (1). The main connecting rods (402) are arranged on the outer walls of the steel sleeves (401). Two adjacent main connecting rods (402) are connected by a splicing plate (403).

3. The assembled bridge pier according to claim 2, characterized in that: When two adjacent prefabricated piers (1) are provided with at least two groups of the steel connection pieces (4), the steel connection pieces (4) are spaced apart along the length direction of the prefabricated pier (1), wherein the two adjacent groups of steel connection pieces (4) are connected by an oblique connection rod (404), and the angle between the oblique connection rod (404) and the axis direction of the prefabricated pier (1) is greater than zero.

4. The assembled bridge pier according to claim 3, characterized in that: The steel connecting member (4) further comprises a connecting angle plate (405), wherein the connecting angle plate (405) is connected to the steel sleeve (401) and the main connecting rod (402), and the plane where the connecting angle plate (405) is located is parallel to the axis of the steel sleeve (401).

5. The assembled bridge pier according to claim 4, characterized in that: The two ends of the oblique connecting rod (404) are respectively connected to the connecting angle plates (405) of two adjacent groups of steel connecting pieces (4).

6. The assembled bridge pier according to any one of claims 1 to 5, characterized in that: The protruding member (101) is an annular member arranged on the outer side wall of the prefabricated pier (1), and the annular member is sheathed around the prefabricated pier (1).

7. The assembled bridge pier according to any one of claims 1 to 5, characterized in that: The prefabricated pier (1) is a pipe pile.

8. A bridge construction method using a bridge erecting machine, characterized in that: A method for constructing a bridge using a prefabricated bridge pier as claimed in any one of claims 1 to 7 comprises the following steps: S1, erecting the middle leg (13) of the first bridge erecting machine (7) on the nth bridge pier (5), and setting the rear leg (14) on the completed beam (6), wherein the nth bridge pier (5) is the frontmost bridge pier (5) currently completed, wherein the first main beam of the first bridge erecting machine (7) protrudes from the designed position of the n+1th bridge pier (5), and setting the bridge crane (10) on the first main beam; S2, transporting the prefabricated pier column (1), cap beam (2) and beam body (6) of the No. n+1 bridge pier (5) to be constructed to the bottom of the first main beam by means of a transport vehicle (11), wherein the No. n beam body (6) is a beam body (6) with two ends respectively overlapping the No. n bridge pier (5) and the No. n+1 bridge pier (5), the bridge crane (10) transporting the prefabricated pier column (1) and the cap beam (2) to the designed position, and installing the prefabricated pier column (1) and the cap beam (2) hole by hole with a cantilever, thereby completing the construction of the No. n+1 bridge pier (5); S3, erecting the front support leg (12) on the top surface of the cap beam (2) installed in step S2, and transporting the beam body (6) No. n to the designed position by the bridge crane (10) and installing it; S4, move the first bridge erection machine (7) and repeat steps S1 to S3 until the construction of the bridge is completed.

9. A bridge construction method using a bridge erecting machine according to claim 8, characterized in that: In step S2, the prefabricated pier column (1) is firstly arranged in the second accommodating cavity (301), stirrups are arranged in the second accommodating cavity (301), and concrete is poured in the second accommodating cavity (301).

10. A bridge construction method using a bridge erecting machine according to claim 8, characterized in that: When multi-span construction is required, the steps are replaced as follows: A1. Install a second bridge erecting machine (8) and a third bridge erecting machine (9), wherein one end of the second main beam of the second bridge erecting machine (8) is arranged on the nth bridge pier (5), and the other end protrudes from the designed position of the n+xth bridge pier (5), wherein x≥2, the legs of the second bridge erecting machine (8) are arranged at the designed position of the n+xth bridge pier (5), the third main beam of the third bridge erecting machine (9) is arranged above the completed beam body (6), the front end of the third main beam protrudes from the nth bridge pier (5), and the bridge crane (10) is arranged on both the second main beam and the third main beam; A2, transport the prefabricated pier columns (1) and the cap beams (2) corresponding to the bridge piers (5) to be constructed from No. n+1 to No. n+x to below the second main beam by means of a transport vehicle (11), transport the beam bodies (6) to No. n+x-1 (6) to below the third bridge erection machine (9) by means of a transport vehicle (11), and the bridge crane (10) provided on the second bridge erection machine (8) transports the prefabricated pier columns (1) and the cap beams (2) to the designed positions and installs them, thereby completing the construction of the bridge piers (5) to No. n+1 to No. n+x (5); A3, the second bridge erecting machine (8) is moved forward until the rear end of the second main beam exceeds the design position of the beam body (6) No. n, and the third bridge erecting machine (9) is moved forward, and the bridge crane (10) on the third bridge erecting machine (9) is used to transport the beam body (6) No. n to the beam body (6) No. n+x-1 in sequence, until the construction of the beam body (6) No. n to the beam body (6) No. n+x-1 is completed; A4. Repeat steps A1 to A3 until the construction of the bridge is completed.

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