Method for lifting and installing a steel cover beam of a single-column pier of a bridge

Abstract

The application provides a method for lifting and installing a steel cover beam of a single-column pier of a bridge, comprising a plurality of supporting units arranged along the length direction of a tunnel; each supporting unit comprises a base, a supporting rod and a supporting fork; the bases of two adjacent supporting units are connected; the supporting rod is arranged on the base and extends away from the base; and the supporting fork is arranged at the end of the supporting rod away from the base. The application also provides a construction method of the method for lifting and installing a steel cover beam of a single-column pier of a bridge. The application can improve the installation precision of the profile steel and is simple to install.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering construction technology, specifically to a method for lifting and installing steel cap beams on a single-column pier of a bridge. Background Technology

[0002] For urban bridges requiring large spans, when existing bridge structures cannot meet the demands of larger loads or spans, adding steel cap beams can enhance the overall load-bearing capacity. In complex terrains such as urban interchanges, overpasses, or mountainous areas, steel cap beams are a preferred solution due to their lightweight and spatial adaptability. For projects requiring rapid construction, steel cap beams offer high processing and installation efficiency, making them suitable for projects with tight deadlines. Lifting the steel cap beams is an essential step in the construction process.

[0003] Chinese utility model patent CN217810544U discloses a bridge steel cap beam lifting device, including a pier foundation. A main support is fixedly installed at the top center of the pier foundation, and a beam box is fixedly installed at the top of the main support. A top lifting device is fixedly installed at the top of the pier foundation. The top lifting device consists of two first support frames and two second support frames fixedly connected together. Steel beam rails are fixedly installed at the middle of each of the two first support frames and two second support frames. Compared with traditional steel cap beam lifting devices, this device overcomes the problems of being bulky and inefficient, and also solves the problem of occupying space under the bridge during construction. It is suitable for working environments where the road surface under the bridge needs to be open to traffic. However, in actual construction, please refer to the appendix to the specification. Figure 1 When a steel expansion joint reinforcement beam 400 is provided on one side of the top of the bridge single-column pier 300, the distance between the expansion joint reinforcement beam 400 and the bridge single-column pier 300 is too close, which often makes it impossible to install the components used to lift the steel cap beam, such as the first support frame and the second support frame disclosed in the above announcement, or the lifting lugs used to hook pulleys or electric hoists in other methods, which makes it impossible to lift the steel cap beam to the preset position. Therefore, based on this situation, it is necessary to provide a method for lifting and installing the steel cap beam on the bridge single-column pier 300. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems mentioned above, and provides a method for lifting and installing steel cap beams on single-column piers of bridges, which can solve the problem that lifting lugs cannot be installed normally in a limited position.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A method for lifting and installing a steel cap beam on a single-column pier of a bridge includes the following steps:

[0007] S1 provides a spreader beam lifting mechanism: the spreader beam lifting mechanism includes several crossbeams and several lifting lugs, one end of the crossbeam extends to the bottom of the expansion joint reinforcement support beam, and the end is provided with a hook hole; the lifting lugs are used to install lifting components;

[0008] S2 Install the spreader beam lifting mechanism: At the position corresponding to the expansion joint reinforcement beam gap, install several of the crossbeams at intervals along the width direction of the bridge box girder;

[0009] S3 Installation of lifting lugs: Based on the structure of the pre-lifted steel cap beam, install lifting lugs at the bottom of the bridge box girder and on the pre-lifted steel cap beam;

[0010] S4 Installation of lifting components: The lifting components are used for lifting steel cap beams. The lifting components are hooked onto the hook holes and the lifting lugs at the bottom of the bridge box beams, and the lifting chain of the lifting components is connected and installed on the lifting lugs of the pre-lifted steel cap beams.

[0011] S5 Lifting component operation: When the lifting component starts operating, the steel cap beam can be lifted along the height direction of the pier.

[0012] Furthermore, the spreading beam lifting mechanism also includes two pairs of extension steels, which are spaced apart along the length of the bridge box girder and the straight line connecting the two pairs of extension steels can extend to the gap of the expansion joint reinforcement beam; the opposite ends of the crossbeam are welded to the two pairs of extension steels.

[0013] Furthermore, the pair of extension steels includes two elongated bolts and a supporting steel plate. The two elongated bolts are spaced apart along the width direction of the bridge box girder, and one end of the elongated bolts is fixedly installed on the top of the bridge box girder. The supporting steel plate is fixed to one end of the two elongated bolts away from the bridge box girder. The crossbeam is welded to the supporting steel plate and located between the two elongated bolts.

[0014] Furthermore, the spreading beam lifting mechanism also includes a wooden block, which is placed on one end of the crossbeam away from the expansion joint reinforcement beam, with the top surface of the wooden block contacting the bridge box girder and the bottom surface of the wooden block contacting the supporting steel plate.

[0015] Furthermore, the lifting component is an electric hoist.

[0016] Furthermore, the lifting lugs include a top lifting lug and a beam lifting lug. The top lifting lug is installed on the bottom of the bridge box girder on the side away from the expansion joint reinforcement support beam, and the beam lifting lug is installed on the middle of the top surface of the pre-lifted steel cap beam.

[0017] Furthermore, the top lifting lug includes a top plate and a vertical plate. The top plate is fixed to the bottom of the bridge box girder by bolts, and the vertical plate is welded to the top plate and perpendicular to the top plate. The vertical plate has hook lifting holes.

[0018] By adopting the above technical solution, the present invention has the following beneficial effects:

[0019] The spreader beam lifting mechanism provides a location for the installation of lifting components. By using the spreader beam lifting mechanism to transmit force, the problem of not being able to install the lifting lugs properly in a limited position can be solved. At the same time, by taking advantage of the lightweight and space adaptability of the steel cap beam, the simple lifting component traction system can greatly speed up the construction efficiency of the steel cap beam and reduce the construction difficulty. Attached Figure Description

[0020] Figure 1 Diagram showing the positional relationship between the expansion joint reinforcement beam and the bridge's single-column pier.

[0021] Figure 2 A schematic diagram of the arrangement of the spreader beam lifting mechanism and lifting components in the method of lifting and installing steel cap beams for single-column piers of bridges.

[0022] Figure 3 for Figure 2 A magnified view of point A in the image.

[0023] In the attached diagram, 1-spreader beam lifting mechanism, 11-crossbeam, 111-hook hole, 12-extension steel, 121-extended bolt, 122-support steel plate, 13-wooden block, 2-lifting lug, 21-top lifting lug, 211-top plate, 212-vertical plate, 213-hook lifting hole, 22-lifting lug on beam, 3-lifting component, 4-lifting chain, 100-pre-lifted steel cap beam, 200-bridge box girder, 300-bridge single-column pier, 400-expansion joint reinforcement support beam. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or it may be centered within another component. When a component is described as "set to" another component, it can be directly set on the other component or it may be centered within another component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this article are for illustrative purposes only.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] like Figure 2 and Figure 3 As shown, a preferred embodiment of the present invention provides a bridge spreader beam lifting mechanism 1, including a crossbeam 11 and a lifting lug 2. One end of the crossbeam 11 extends below the expansion joint reinforcement beam, and this end is provided with a hook hole 111. The crossbeam 11 is made of I-beam. The lifting lug 2 is used to install the lifting component 3.

[0028] In this embodiment, the spreading beam lifting mechanism 1 further includes two pairs of extension steels 12. The two pairs of extension steels 12 are spaced apart along the length direction of the bridge box girder 200, and the straight line connecting the two pairs of extension steels 12 can extend to the gap of the expansion joint reinforcement support beam 400. The opposite ends of the crossbeam 11 are welded to the two pairs of extension steels 12. Specifically, each pair of extension steels 12 includes two elongated bolts 121 and a supporting steel plate 122. The two elongated bolts 121 are spaced apart along the width direction of the bridge box girder 200, and one end of the elongated bolts 121 is fixedly installed on the top of the bridge box girder 200. The fixing method of the elongated bolts 121 is a common technical means in the art and will not be described in detail here. The supporting steel plate 122 is fixed to the end of the two elongated bolts 121 away from the bridge box girder 200. The crossbeam 11 is welded to the supporting steel plate 122 and located between the two elongated bolts 121.

[0029] In actual construction, the end of the crossbeam 11 that extends into the gap of the expansion joint reinforcement beam 400 is the end where the lifting component 3 is hung, which is the end that applies force. This end is pressed down by force when used to lift the pre-lifted steel cap beam 100. The structure of the extended bolts 121 and the supporting steel plate 122 can increase the load-bearing area of ​​the crossbeam 11, facilitating the work of the lifting component 3. The end of the crossbeam 11 that is away from the expansion joint reinforcement beam 400 is the load-bearing end. Therefore, in actual installation, the supporting steel plate 122 at this end can be omitted. In this case, the two extended bolts 121 can be directly welded to the crossbeam 11.

[0030] In this embodiment, the spreading beam lifting mechanism 1 further includes a wooden block 13, which is placed on the end of the crossbeam 11 away from the expansion joint reinforcement beam 400. The top surface of the wooden block 13 contacts the bridge box girder 200, and the bottom surface of the wooden block 13 contacts the supporting steel plate 122. When the lifting component 3 performs work, the wooden block 13 can provide support for the crossbeam 11.

[0031] In this embodiment, the lifting component 3 is an electric hoist. The electric hoist is equipped with an anti-collision device and a limit system, which can avoid the swinging and impact of the pre-lifted steel cap beam 100 during the hoisting process and ensure the accurate positioning of the pre-lifted steel cap beam 100.

[0032] In this embodiment, the lifting lug 2 includes a top lifting lug 21 and a beam-mounted lifting lug 22. The top lifting lug 21 is installed on the bottom of the bridge box girder 200 away from the expansion joint reinforcement beam 400, and the beam-mounted lifting lug 22 is installed on the middle of the top surface of the pre-lifted steel cap beam 100. The top lifting lug 21 includes a top plate 211 and a vertical plate 212. The top plate 211 is fixed to the bottom of the bridge box girder 200 by bolts, and the vertical plate 212 is welded to the top plate 211 and perpendicular to the top plate 211. The vertical plate 212 has hook lifting holes 213. The beam-mounted lifting lug 22 is obtained by bending steel bars into a U-shape. The structure of the top lifting lug 21 can reduce the inertial impact during horizontal operation and improve construction safety.

[0033] This embodiment also provides a method for lifting and installing a steel cap beam on a single-column pier of a bridge, including the following steps:

[0034] S1 provides a spreader beam lifting mechanism 1;

[0035] S2 Install the spreader beam lifting mechanism 1: At the position corresponding to the gap of the expansion joint reinforcement beam 400, install several crossbeams 11 at intervals along the width direction of the bridge box girder 200. Specifically, fix the extension bolts 121 to the bottom of the bridge box girder 200, and then place the wooden blocks 13 between the support steel plate 122 and the bottom of the bridge box girder 200.

[0036] S3 Install lifting lug 2: According to the structure of the pre-lifted steel cap beam 100, install lifting lug 2 at the bottom of the bridge box girder 200 and on the pre-lifted steel cap beam 100. Specifically, install top lifting lug 21 on the side of the bottom of the bridge box girder 200 away from the expansion joint reinforcement support beam 400, and install beam lifting lug 22 in the middle of the top surface of the pre-lifted steel cap beam 100.

[0037] S4 Install lifting component 3: Hook the lifting component 3 onto the hook hole 111 and the top lifting lug 21, and connect the lifting chain 4 of the lifting component 3 to the beam lifting lug 22 of the pre-lifted steel cap beam 100;

[0038] S5 Lifting Component 3 Operation: When lifting component 3 starts operating, the steel cap beam can be lifted along the height direction of the pier.

[0039] The method of lifting and installing steel cap beams on single-column piers in this embodiment can achieve the following technical effects:

[0040] 1. The spreading beam lifting mechanism 1 is set to provide a position for the installation of the lifting component 3. The spreading beam lifting mechanism 1 is used to transmit the force point, which can solve the problem that the lifting lug 2 cannot be installed normally in a limited position. At the same time, taking advantage of the lightweight and space adaptability of the steel cap beam, the simple lifting component 3 traction system greatly speeds up the construction efficiency of the steel cap beam and reduces the construction difficulty.

[0041] 2. Simple structure and wide applicability: The electric hoist supports various rail types such as I-beams and channel steel, adapting to the installation requirements of different specifications of pre-lifted steel cap beams. In bridge reinforcement projects, complex structural adjustments can be flexibly addressed by replacing or adding supports and installing upper and lower support pads, among other supporting processes.

[0042] 3. Minimal impact on traffic and flexible traffic access: The pre-embedded lifting lugs 2 are used as the load-bearing points, resulting in a small additional load during construction. Moreover, most construction is carried out at night or in a partial manner, which minimizes the impact on the clearance under the bridge and daily traffic. Construction is carried out at night and traffic is restored during the day.

[0043] This is understandable. The lifting component 3 is not limited to using an electric hoist in this embodiment. In other embodiments, the lifting component 3 can be a manual hoist. When using a manual hoist, those skilled in the art can select the installation position of the hand-operated end, which is a common technical means used by those skilled in the art and will not be described in detail here.

[0044] The above description is a detailed description of the preferred embodiments of the present invention. However, the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modifications made under the technical spirit of the present invention should fall within the patent scope covered by the present invention.

Claims

1. A method for lifting and installing a steel cap beam on a single-column pier of a bridge, characterized in that, Includes the following steps: S1 provides a spreader beam lifting mechanism (1): the spreader beam lifting mechanism (1) includes several crossbeams (11) and several lugs (2), one end of the crossbeam (11) extends to the bottom of the expansion joint reinforcement support beam (400), and the end is provided with a hook hole (111); the lugs (2) are used to install lifting components (3). S2 Install the spreading beam lifting mechanism (1): At the position corresponding to the gap of the expansion joint reinforcement beam (400), install several of the crossbeams (11) at intervals along the width direction of the bridge box girder (200). S3 Install lifting lugs (2): According to the structure of the pre-lifted steel cap beam (100), install lifting lugs (2) at the bottom of the bridge box girder (200) and on the pre-lifted steel cap beam (100); S4 Install lifting component (3): The lifting component (3) is used for lifting steel cap beams. The lifting component (3) is hooked onto the hook hole (111) and the lifting lug (2) at the bottom of the bridge box girder (200). The lifting chain (4) of the lifting component (3) is connected and installed on the lifting lug (2) of the pre-lifted steel cap beam (100). S5 Lifting component (3) operation: When the lifting component (3) starts to operate, the steel cap beam can be lifted along the height direction of the pier.

2. The method for lifting and installing a steel cap beam on a single-column pier of a bridge as described in claim 1, characterized in that: The spreading beam lifting mechanism (1) also includes two pairs of extension steels (12), which are spaced apart along the length of the bridge box girder (200) and the straight line connecting the two pairs of extension steels (12) can extend to the gap of the expansion joint reinforcement beam (400); the opposite ends of the crossbeam (11) are welded to the two pairs of extension steels (12).

3. The method for lifting and installing a steel cap beam on a single-column pier of a bridge as described in claim 2, characterized in that: The pair of extension steels (12) includes two extension bolts (121) and a support steel plate (122). The two extension bolts (121) are spaced apart along the width direction of the bridge box girder (200), and one end of the extension bolts (121) is fixedly installed on the top of the bridge box girder (200). The support steel plate (122) is fixed to one end of the two extension bolts (121) away from the bridge box girder (200). The crossbeam (11) is welded to the support steel plate (122) and located between the two extension bolts (121).

4. The method for lifting and installing a steel cap beam on a single-column pier of a bridge as described in claim 3, characterized in that: The spreading beam lifting mechanism (1) also includes a wooden block (13), which is placed on one end of the crossbeam (11) away from the expansion joint reinforcement beam (400), and the top surface of the wooden block (13) contacts the bridge box girder (200), and the bottom surface of the wooden block (13) contacts the supporting steel plate (122).

5. The method for lifting and installing a steel cap beam on a single-column pier of a bridge as described in claim 1, characterized in that: The lifting component (3) is an electric hoist.

6. The method for lifting and installing a steel cap beam on a single-column pier of a bridge as described in claim 1, characterized in that: The lifting lug (2) includes a top lifting lug (21) and a beam lifting lug (22). The top lifting lug (21) is installed on the bottom of the bridge box girder (200) away from the expansion joint reinforcement beam (400), and the beam lifting lug (22) is installed on the middle of the top surface of the pre-lifted steel cap beam (100).

7. The method for lifting and installing a steel cap beam on a single-column pier of a bridge as described in claim 6, characterized in that: The top lifting lug (21) includes a top plate (211) and a vertical plate (212). The top plate (211) is fixed to the bottom of the bridge box girder (200) by bolts. The vertical plate (212) is welded to the top plate (211) and is perpendicular to the top plate (211). The vertical plate (212) has a hook lifting hole (213).

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