A bridge precast main girder installation device and construction method

Abstract

The present application relates to a bridge precast main girder installation device and a construction method, belonging to the field of bridge construction equipment technology. It includes a slide rail arranged on a bridge pier, a frame slidably arranged on the slide rail, two guide plates hinged at both ends of the frame, a driving assembly arranged on the frame for driving the two guide plates to rotate towards or away from each other, a fixing mechanism arranged on the frame for fixing the frame on the bridge pier, a laser emitter and a scale arranged on the frame, and the laser emitter extends away from the slide rail in the horizontal direction. The present application has the effect of reducing the labor intensity of workers.

Description

Technical Field

[0001] This application relates to the field of bridge construction equipment technology, and in particular to a device and construction method for installing precast main girders of bridges. Background Art

[0002] A bridge generally refers to a structural building erected over rivers, lakes and seas for vehicles, pedestrians, etc. to pass through smoothly. To adapt to the modern high-speed development of the transportation industry, a bridge is also extended to a building that is constructed to cross mountain streams, poor geological conditions or meet other traffic needs to make passage more convenient. Among them, the main girder refers to the beam in the superstructure that supports various loads and transfers them to the piers and abutments, and is one of the main load-bearing structures of the bridge.

[0003] In the construction of bridge main girders, for cross-river bridges, when the river channel is an important transportation route, the cantilever casting method is usually adopted to ensure that its navigation capacity is not affected; for approach bridges and interchange bridges, the support casting-in-place method is usually adopted when the foundation is good; when it is necessary to spend too much cost on foundation treatment, precast beams are usually adopted.

[0004] In view of the above related technologies, when installing precast main girders of bridges, the main girders are usually hoisted to the piers by a crane for installation. When the bridge is hoisted to the installation position on the pier, workers use tools to push the precast main girder for fine adjustment and positioning. In this process, it is time-consuming and laborious, wastes human resources, and increases the labor intensity of workers. Summary of the Invention

[0005] In order to reduce the labor intensity of workers, this application provides a device and construction method for installing precast main girders of bridges.

[0006] On the one hand, this application provides a device for installing precast main girders of bridges, adopting the following technical solution:

[0007] A device for installing precast main girders of bridges includes a slide rail arranged on the pier. A frame is slidably arranged on the slide rail. Two guide plates are hinged at both ends of the frame. A driving assembly is arranged on the frame for driving the two guide plates to rotate towards or away from each other. A fixing mechanism for fixing the frame on the pier is also arranged on the frame. A laser emitter and a scale are also arranged on the frame. The laser emitter extends horizontally away from the slide rail.

[0008] By adopting the above technical solution, the rack is installed on the slide rail, the rack is moved so that the racks on two adjacent piers are opposite to each other, and the laser emitted by the laser emitter is opposite to the center of the scale on the opposite rack, achieving the effect of positioning the rack, driving the two guide plates to rotate to be flush with the two side walls of the main beam through the driving assembly, lifting the main beam between the two guide plates by the hoisting machinery, and lowering the main beam between the two guide plates, and the fixing mechanism fixes the rack on the pier, so that there is no need for workers to adjust the position of the hoisted main beam, reducing the labor intensity of the workers.

[0009] Optionally, the driving assembly includes a first cylinder. A receiving groove for receiving the first cylinder is formed on the rack. The cylinder block of the first cylinder is hinged to the bottom wall of the receiving groove, and the end of the piston rod of the first cylinder is hinged to the guide plate.

[0010] By adopting the above technical solution, the piston rod of the first cylinder extends or retracts to drive the guide plate to rotate and be fixed, achieving the effect of facilitating the rotation of the guide plate.

[0011] Optionally, a sliding groove is further formed on the rack. A slider is slidably arranged in the sliding groove, and one end of the guide plate is hinged to the slider.

[0012] By adopting the above technical solution, one end of the guide plate is slidably installed in the sliding groove through the slider, and in cooperation with the extension or retraction of the piston rod of the first cylinder, the distance between the two guide plates is conveniently adjusted to be applicable to main beams of different sizes.

[0013] Optionally, a second cylinder is arranged in the sliding groove. The cylinder block of the second cylinder is connected to the rack, and the end of the piston rod of the second cylinder is connected to the slider.

[0014] By adopting the above technical solution, the piston rod of the second cylinder extends or retracts to drive the slider to move along the sliding groove, thereby achieving the effect of facilitating the movement of the slider in the sliding groove.

[0015] Optionally, a plurality of third cylinders are arranged at the bottom of the rack, and gaskets are arranged at the ends of the piston rods of the third cylinders.

[0016] By adopting the above technical solution, when the rack moves to the main beam installation position, the piston rods of the third cylinders extend and the gaskets are in contact with the surface of the pier, so that when the main beam is in contact with the guide plate, the rack is supported by the third cylinders, achieving the effect of facilitating the support of the rack.

[0017] Optionally, the fixing mechanism includes a clamping arm and a clamping member. The clamping arm is C-shaped and the end of the clamping arm extends below the pier. The clamping member is arranged on the clamping arm and is used for clamping and fixing the clamping arm on the pier.

[0018] By adopting the above technical solution, the clamping member clamps and fixes the frame on the pier, thus achieving the effect of facilitating the fixing of the frame on the pier.

[0019] Optionally, the clamping member includes an extrusion plate, a pressing block and an oil delivery pipe. A placement groove is formed on the guide plate. The extrusion plate is arranged on the guide plate through the placement groove. A first oil cavity is formed on the bottom wall of the placement groove on the guide plate. One side of the extrusion plate is slidably arranged in the first oil cavity. The end of the clamping arm is provided with a second oil cavity facing the pier. The pressing block is slidably arranged in the second oil cavity. The first oil cavity is communicated with the second oil cavity through the oil delivery pipe.

[0020] By adopting the above technical solution, when the main beam abuts against the extrusion plate, the main beam drives the extrusion plate to move towards the guide plate. The hydraulic oil in the first oil cavity is extruded and delivered to the second oil cavity. The hydraulic oil in the second oil cavity drives the pressing block to move and fit against the bottom of the pier, thereby tightly pressing and fixing the frame on the pier.

[0021] Optionally, a clamping groove is formed on the side wall of the placement groove, and a clamping block is arranged on the extrusion plate. The clamping block is slidably arranged in the clamping groove.

[0022] By adopting the above technical solution, the extrusion plate is slidably installed in the clamping groove through the clamping block, which facilitates the sliding installation of the extrusion plate on the guide plate.

[0023] On the other hand, the present application provides a method for installing a bridge main beam, including the following steps:

[0024] S1: Set the slide rail on the pier and slidably arrange the frame on the slide rail; S2: Move the frame along the slide rail to the main beam installation position so that the laser emitted by the laser emitter on the frame is directly opposite to the center of the scale on the frame of the adjacent main beam; S3: Start the driving component to drive the two guide plates to rotate until they are flush with the two side walls of the main beam; S4: Hoist the main beam to between the two guide plates by a hoisting machine, lower the main beam, and the main beam is lowered along the two guide plates to be placed on the pier; S5: When the main beam abuts against the guide plate, the fixing mechanism fixes the frame on the pier.

[0025] By adopting the above technical solution, the frame is installed on the slide rail, and the frames on adjacent two piers are adjusted to be directly opposite positions. The two guide plates are rotated until they are flush with the two side walls of the main beam. The main beam is hoisted to the installation position by a hoisting machine and lowered between the two guide plates. As the main beam is lowered, the main beam is lowered until it abuts against the two guide plates on both sides respectively, thereby achieving the effect of positioning the main beam.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. Mount the frame on the slide rail, move the frame and align the frames on adjacent two bridge piers. The laser emitted by the laser emitter is aligned with the center of the scale on the opposite frame, achieving the effect of positioning the frame. Drive the two guide plates to rotate until they are flush with the two side walls of the main beam through the driving component. Lift the main beam to the position between the two guide plates by a hoisting machine and lower the main beam along the space between the two guide plates. The fixing mechanism fixes the frame on the bridge pier, so that workers do not need to adjust the position of the hoisted main beam, reducing the labor intensity of the workers.

[0028] 2. When the main beam abuts against the extrusion plate, the main beam drives the extrusion plate to move towards the guide plate. The hydraulic oil in the first oil chamber is squeezed and delivered to the second oil chamber. The hydraulic oil in the second oil chamber drives the abutting block to move and fit against the bottom of the bridge pier, thereby tightly fixing the frame on the bridge pier.

[0029] 3. Mount the frame on the slide rail and adjust the frames on adjacent two bridge piers to be in a facing position. Rotate the two guide plates until they are flush with the two side walls of the main beam. Lift the main beam to the installation position by a hoisting machine and lower it along the space between the two guide plates. As the main beam is lowered, the main beam is lowered until it abuts against the two guide plates on both sides respectively, thus achieving the effect of positioning the main beam. Description of the Drawings

[0030] Figure 1 is a schematic diagram of the installation position of the embodiment of the present application.

[0031] Figure 2 is a schematic structural diagram of the embodiment of the present application.

[0032] Figure 3 is a schematic structural diagram for showing the fixing mechanism in the embodiment of the present application.

[0033] Description of the Reference Numerals:

[0034] 1, slide rail; 2, frame; 21, laser emitter; 22, scale; 23, receiving groove; 24, chute; 25, slider; 26, second cylinder; 27, third cylinder; 28, gasket; 3, guide plate; 31, placement groove; 32, first oil chamber; 33, clamping groove; 4, driving component; 41, first cylinder; 5, fixing mechanism; 51, clamping arm; 512, second oil chamber; 52, clamping member; 521, extrusion plate; 5211, clamping block; 522, abutting block; 523, oil delivery pipe. Detailed Embodiment

[0035] The following further Figures 1 - 3 describes the present application in detail.

[0036] The embodiment of the present application discloses a kind of, referring to Figure 1 and Figure 2, A bridge precast main girder installation device includes a slide rail 1 and a frame 2 installed on the slide rail 1. Two slide rails 1 are installed in parallel on the outside of the pier. The frame 2 is a rectangular plate body and is slidably installed on the slide rail 1. The height of the frame 2 is lower than the height of the main girder installation seat on the pier. Guide plates 3 are installed at both ends of the frame 2. The guide plates 3 are rectangular plate bodies. One end of the guide plate 3 is hinged to the frame 2. A driving assembly 4 is installed on the frame 2. The driving assembly 4 is connected to the guide plate 3 and is used to drive the guide plate 3 to rotate. A fixing mechanism 5 is also installed on the frame 2. The fixing mechanism 5 is used to fix the frame 2 to the pier; a laser emitter 21 and a scale 22 are installed on the side of the frame 2 facing away from the pier. The laser emitter 21 emits laser horizontally and away from the slide rail 1. Frames 2 are also installed on adjacent piers. The laser emitters 21 and the scales 22 on two opposite frames 2 are aligned with each other.

[0037] Slidably install the frame 2 on the slide rail 1, move the frame 2 to the main girder installation position, and make the laser emitted by the laser emitter 21 on the frame 2 irradiate the center of the scale 22 on the opposite frame 2, so that the two frames 2 are aligned with each other. Drive the two guide plates 3 to rotate through the driving assembly 4, so that the inclination angles of the two guide plates 3 are flush with the two side walls of the box girder main girder. Hoist the main girder between the two guide plates 3 by a hoisting machine and gradually lower it. During the lowering process, the two guide plates 3 limit the main girder. When both sides of the main girder are in contact with the two guide plates 3, the position of the main girder is fixed, thus achieving the effect of positioning the main girder. And there is no need for workers to manually adjust the position of the main girder, reducing the labor intensity of workers, improving the safety of construction, and saving human resources, achieving the effect of green building.

[0038] Refer to Figure 2 and Figure 3 , The driving assembly 4 includes a first cylinder 41. Accommodation grooves 23 are opened at both ends of the frame 2 along the length direction of the frame 2. The cylinder body of the first cylinder 41 is hingedly installed on the bottom wall of the accommodation groove 23. The end of the piston rod of the first cylinder 41 is hinged to the side of the guide plate 3 facing the frame 2. A chute 24 is opened on the frame 2. The length direction of the chute 24 is the same as the length direction of the accommodation groove 23. A slider 25 is clamped and slidably installed in the chute 24. One section of the guide plate 3 is hinged to the slider 25. A second cylinder 26 is horizontally installed in the chute 24. The cylinder body of the second cylinder 26 is fixedly connected to the frame 2. The piston rod of the second cylinder 26 extends horizontally towards the slider 25 and is connected to the slider 25.

[0039] When installing the main beam, the first cylinder 41 drives the guide plate 3 to rotate and adjust the inclination angle of the guide plate 3 so that the guide plate 3 is parallel to the side wall of the main beam; the second cylinder 26 drives the slider 25 to move along the chute 24, thereby adjusting the distance between the two guide plates 3 to be applicable to main beams of different sizes. After the main beam is hoisted and installed on the mounting seat by a hoisting machine, the first cylinder 41 drives the guide plate 3 to rotate and fit with the frame 2, and the frame 2 is removed from below the main beam to facilitate the recycling of the frame 2.

[0040] Refer to Figure 2 and Figure 3 , at the four corners of the bottom of the frame 2, third cylinders 27 are installed. The cylinder block of the third cylinder 27 is fixedly connected to the frame 2, the piston rod of the third cylinder 27 extends vertically downward, and a gasket 28 is installed at the end of the piston rod of the third cylinder 27. When the frame 2 moves to the installation position, the piston rod of the third cylinder 27 extends vertically downward until the gasket 28 fits with the surface of the bridge pier. When the main beam is placed between the two guide plates 3 at this time, the frame 2 is supported by the third cylinder 27.

[0041] Refer to Figure 2 and Figure 3 , the fixing mechanism 5 includes a clamping arm 51 and a clamping member 52. The clamping arm 51 is a C-shaped rod body. Two clamping arms 51 are installed in parallel on the side of the frame 2 away from the bridge pier. The end of the clamping arm 51 extends below the bridge pier. The clamping member 52 is installed on the clamping arm 51 and is used to clamp the bridge pier, thereby fixing the frame 2 on the bridge pier. The clamping member 52 includes a pressing plate 521, a pressing block 522, and an oil delivery pipe 523. A rectangular placement groove 31 is formed on the side plate surface of the guide plate 3 away from the frame 2. The pressing plate 521 is a rectangular plate body, and the pressing plate 521 is slidably installed on the guide plate 3 through the placement groove 31. A first oil cavity 32 is formed on the bottom wall of the placement groove 31 on the guide plate 3. One side of the pressing plate 521 facing the guide plate 3 slidably extends into the first oil cavity 32. A second oil cavity 512 is formed at the end of the clamping arm 51 facing the bridge pier. The pressing block 522 is slidably installed in the second oil cavity 512. One end of the oil delivery pipe 523 is communicated with the first oil cavity 32, and the other end is communicated with the second oil cavity 512. The first oil cavity 32, the second oil cavity 512, and the oil delivery pipe 523 are all filled with hydraulic oil.

[0042] Refer to Figure 2 and Figure 3 , a clamping groove 33 is formed on the side wall of the placement groove 31. A clamping block 5211 is installed on the pressing plate 521. The clamping block 5211 is slidably installed in the clamping groove 33. The clamping block 5211 prevents the pressing plate 521 from detaching from the guide plate 3 and plays a role in limiting the pressing plate 521.

[0043] The implementation principle of a prefabricated bridge main beam installation device in an embodiment of the present application is as follows: the frame 2 is moved to the installation position of the main beam along the slide rail 1, the first cylinder 41 is started, and the first cylinder 41 drives the guide plate 3 to rotate until it is flush with the two side walls of the main beam. The main beam is lifted between the two guide plates 3 by a lifting machine and gradually lowered. When the main beam collides with the extrusion plate 521, the extrusion plate 521 squeezes the hydraulic oil in the first oil chamber 32, and the hydraulic oil is transported to the second oil chamber 512 through the oil pipe 523, pushing the clamping block 522 to collide with the bottom of the pier, thereby fixing the frame 2 on the pier. As the main beam is lowered, the two guide plates 3 position the main beam.

[0044] The present application also discloses a bridge main beam installation construction method, comprising the following steps:

[0045] S1: Lay the slide rail 1 on the bridge pier, and slide the rack 2 onto the slide rail 1;

[0046] S2: driving the rack 2 to move along the slide rail 1, so that the rack 2 moves to the main beam installation position, and adjusting the positions of the two racks 2 on the adjacent piers so that the laser emitted by the laser transmitter 21 on the rack 2 is aligned with the center of the scale 22 of the rack 2 on the adjacent main beam;

[0047] S3: Start the first cylinder 41 to drive the guide plate 3 to rotate so that the guide plate 3 is parallel to the side wall of the main beam;

[0048] S4: Start the second cylinder 26 to adjust the distance between the two guide plates 3, and during this period, adjust the first cylinder 41 synchronously so that the inclination angle of the guide plates 3 remains unchanged;

[0049] S5: The main beam is hoisted between the two installation plates by a hoisting machine, and the main beam is gradually lowered. When the two side walls of the main beam are in contact with the two guide plates 3, the position of the main beam is fixed;

[0050] S6: After the main beam is lowered and installed, the first cylinder 41 is started to drive the guide plate 3 to rotate to fit the frame 2, and the frame 2 is moved out from under the installed main beam along the slide rail 1.

[0051] Finally, it should be noted that in the description of this application, it should be noted that the terms "vertical", "up", "down", "horizontal", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A bridge precast main girder installation device, Characterized in that: It includes a slide rail (1) arranged on the pier. A frame (2) is slidably arranged on the slide rail (1). Two guide plates (3) are hinged at both ends of the frame (2). A driving component (4) for driving the two guide plates (3) to rotate towards each other or away from each other is arranged on the frame (2). A fixing mechanism (5) for fixing the frame (2) on the pier is also arranged on the frame (2). A laser emitter (21) and a scale (22) are also arranged on the frame (2). The laser emitter (21) extends horizontally away from the slide rail (1); A chute (24) is also opened on the frame (2). A slider (25) is slidably arranged in the chute (24). One end of the guide plate (3) is hinged to the slider (25). A second cylinder (26) is arranged in the chute (24). The cylinder body of the second cylinder (26) is connected to the frame (2), and the end of the piston rod of the second cylinder (26) is connected to the slider (25); The fixing mechanism (5) includes a clamping arm (51) and a clamping member (52). The clamping arm (51) is C-shaped and the end of the clamping arm (51) extends below the pier. The clamping member (52) is arranged on the clamping arm (51) and is used to clamp and fix the clamping arm (51) on the pier. The clamping member (52) includes a pressing plate (521), a pressing block (522), and an oil delivery pipe (523). A placement groove (31) is opened on the guide plate (3). The pressing plate (521) is arranged on the guide plate (3) through the placement groove (31). A first oil cavity (32) is opened on the bottom wall of the guide plate (3) and located in the placement groove (31). One side of the pressing plate (521) is slidably arranged in the first oil cavity (32). A second oil cavity (512) is opened towards the pier at the end of the clamping arm (51). The pressing block (522) is slidably arranged in the second oil cavity (512). The first oil cavity (32) is connected to the second oil cavity (512) through the oil delivery pipe (523). A clamping groove (33) is opened on the side wall of the placement groove (31). A clamping block (5211) is arranged on the pressing plate (521). The clamping block (5211) is slidably arranged in the clamping groove (33).

2. The bridge precast main girder installation device according to claim 1, Characterized in that: The driving component (4) includes a first cylinder (41). A receiving groove (23) for receiving the first cylinder (41) is opened on the frame (2). The cylinder body of the first cylinder (41) is hinged to the bottom wall of the receiving groove (23), and the end of the piston rod of the first cylinder (41) is hinged to the guide plate (3).

3. The bridge precast main girder installation device according to claim 1, Characterized in that: A plurality of third cylinders (27) are arranged at the bottom of the frame (2). A gasket (28) is arranged at the end of the piston rod of the third cylinder (27).

4. A construction method for installing a bridge main girder, using the bridge precast main girder installation device described in any one of the above claims 1-3, characterized in that, it includes the following steps: S1: Set the slide rail (1) on the pier, and slidably set the frame (2) on the slide rail (1); S2: Move the frame (2) along the slide rail (1) to the main girder installation position, so that the laser emitted by the laser emitter (21) on the frame (2) is exactly opposite to the center of the scale (22) of the frame (2) on the adjacent main girder; S3: Start the driving component (4) to drive the two guide plates (3) to rotate until they are flush with the two side walls of the main girder; S4: The main girder is hoisted by a hoisting machine between the two guide plates (3), lower the main girder, and the main girder is lowered along the two guide plates (3) and placed on the pier; S5: When the main girder is in contact with the guide plate (3), the fixing mechanism (5) fixes the frame (2) on the pier.

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