Temporary bridge support

Abstract

The utility model relates to a temporary support for a bridge. The temporary support comprises a base, a screw rod and a top plate, the base comprises a vertically-arranged steel pipe, a bottom plate is welded to the bottom of the steel pipe, a bearing plate is welded to the top of the steel pipe, a lower base plate is welded to the middle of the top face of the bearing plate, and a through hole is formed in the lower base plate and right faces the center of the steel pipe. The lower end of the screw is inserted into the steel pipe from the through hole in the lower base plate, the axis of the screw coincides with the axis of the steel pipe, and the screw is in threaded connection with an adjusting nut on the top face of the lower base plate. An upper base plate is welded to the middle of the bottom face of the top plate, a fixing nut is welded to the middle of the bottom face of the upper base plate, the axis of the fixing nut right faces the center of the top plate, and the upper end of the screw is in threaded connection with the fixing nut and abuts against the bottom face of the upper base plate. The lifting of the screw rod can be adjusted by rotating the adjusting nut, so that the height of the temporary support is adjusted, the adjusting precision is high, and the controllability is good.

Description

Technical Field

[0001] The utility model belongs to the technical field of bridge construction and relates to a temporary support used for the installation and construction of prefabricated bridge beams. Background Art

[0002] During the installation and construction of precast bridge beams, temporary supports are usually placed on the piers. The height of the temporary supports is adjustable. The initial height of the temporary supports is set higher than the permanent supports. The precast beams are placed on the temporary supports first. After the position is adjusted, the height of the temporary supports is lowered and the precast beams are dropped onto the permanent supports.

[0003] At present, the prefabricated beams are mostly installed with steel sand cylinders as temporary supports. Sand cylinders are a common unloading device in support structures. As temporary supports for prefabricated beam installation, there are the following problems:

[0004] 1. The installation of prefabricated beams has high requirements for elevation control, but the height of the sand barrel is controlled by the amount of sand filled inside. The compression of the sand is difficult to control accurately, which is not conducive to refined construction;

[0005] 2. It takes a long time to fill and release the sand in the sand barrel, and the overall weight of the sand barrel is large, so lifting equipment is required for installation, and the construction efficiency is low;

[0006] 3. When the beam is dropped, the temporary supports on each pier need to be lowered synchronously. However, since the sand release speed of each sand barrel is different and the sand flow rate is difficult to control, the falling speed at both ends of the precast beam is inconsistent, affecting the stability of the bridge structure and posing a safety hazard. Summary of the invention

[0007] The utility model aims to solve the above problems and provide a temporary bridge support which can accurately control the elevation and has simple operation and safe construction.

[0008] The technical solution of the utility model is as follows:

[0009] A temporary bridge support, characterized in that it includes a base, a screw and a top plate; the base includes a vertically arranged steel pipe, a bottom plate is welded to the bottom of the steel pipe, a bearing plate is welded to the top, a lower pad is welded in the middle of the top surface of the bearing plate, and a through hole is opened on the lower pad facing the center of the steel pipe; the lower end of the screw is inserted into the steel pipe from the through hole on the lower pad, and the axis of the screw coincides with the axis of the steel pipe, and an adjusting nut is screwed on the top surface of the lower pad on the screw; an upper pad is welded in the middle of the bottom surface of the top plate, a fixing nut is welded in the middle of the bottom surface of the upper pad, and the axis of the fixing nut faces the center of the top plate, and the upper end of the screw is screwed to the fixing nut and tightened to the bottom surface of the upper pad.

[0010] The utility model adjusts the height of the temporary support by lifting the screw rod, and the steel structure has a strong bearing capacity and a small deformation when under pressure, so it is easy to realize the precise construction of the temporary support; the lifting height is well controllable and safe; the overall structure is light and easy to install and unload, which can improve construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the elevation structure of the utility model when it is elevated;

[0012] Figure 2 This is a schematic diagram of the elevation structure of the utility model when the height is reduced;

[0013] Figure 3 It is a schematic diagram of the cross section of the base steel pipe. DETAILED DESCRIPTION

[0014] like Figure 1 , Figure 2 As shown, the utility model includes a base, a screw and a top plate; the base includes a vertically arranged steel pipe 1, a bottom plate 2 is welded to the bottom of the steel pipe, a bearing plate 3 is welded to the top of the steel pipe 1, a lower pad 4 is welded in the middle of the top surface of the bearing plate 3, and a through hole is opened on the lower pad facing the center of the steel pipe; the lower end of the screw 5 is inserted into the steel pipe 1 from the through hole on the lower pad 4, and the axis of the screw 5 coincides with the axis of the steel pipe 1, and an adjusting nut 6 is screwed on the screw 5 on the top surface of the lower pad 4; an upper pad 8 is welded in the middle of the bottom surface of the top plate 7, and a fixing nut 9 is welded in the middle of the bottom surface of the upper pad 8, and the axis of the fixing nut faces the center of the top plate, and the upper end of the screw 5 is screwed with the fixing nut 9 and pressed against the bottom surface of the upper pad 8.

[0015] In the above structure, by rotating the adjusting nut 6, the screw rod 5 can be adjusted to rise and fall, thereby adjusting the height of the temporary support.

[0016] During the specific implementation of the utility model, in order to ensure the compressive resistance of the base, a plurality of stiffening plates 10 are welded between the top surface of the bottom plate and the bottom surface of the load-bearing plate in the steel pipe 1 of the base. The plurality of stiffening plates are welded crosswise in the vertical and horizontal directions, and the plane is arranged in a "well" shape. The center of the "well" shape is located on the axis of the steel pipe, and the four intersection points between the stiffening plates are located below the lower pad 4. The outer edges of the stiffening plates 10 are welded to the inner wall of the steel pipe 1.

[0017] When the utility model is used, it is placed on the bridge pier, and the height of the temporary support is adjusted to be higher than the permanent support by adjusting the nut, and the height of the temporary supports on each pier is adjusted to be consistent; the prefabricated beam is hoisted onto the temporary support for position adjustment, and when the beam is dropped, multiple construction workers synchronously operate to lower the height of each temporary support, and drop the prefabricated beam onto the permanent support.

Claims

1. A temporary bridge support, characterized in that: It includes a base, a screw and a top plate; the base includes a vertically arranged steel pipe, a bottom plate is welded to the bottom of the steel pipe, a load-bearing plate is welded to the top, a lower pad is welded in the middle of the top surface of the load-bearing plate, and a through hole is opened on the lower pad facing the center of the steel pipe; the lower end of the screw is inserted into the steel pipe from the through hole on the lower pad, and the axis of the screw coincides with the axis of the steel pipe, and an adjusting nut is screwed on the top surface of the lower pad on the screw; an upper pad is welded in the middle of the bottom surface of the top plate, a fixing nut is welded in the middle of the bottom surface of the upper pad, and the axis of the fixing nut faces the center of the top plate, and the upper end of the screw is screwed to the fixing nut and tightened to the bottom surface of the upper pad.

2. The temporary bridge support according to claim 1, characterized in that: A plurality of stiffening plates are welded between the top surface of the bottom plate and the bottom surface of the bearing plate in the steel pipe of the base. The plurality of stiffening plates are welded crosswise in a vertical and horizontal direction and arranged in a "well" shape in the plane. The center of the "well" shape is located on the axis of the steel pipe. The four intersection points between the stiffening plates are located below the lower pad, and the outer edges of the stiffening plates are welded to the inner wall of the steel pipe.

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