Supporting structure for temporary pier for pushing construction of steel box girder of self-anchored suspension bridge

Abstract

The utility model belongs to the technical field of bridge construction, and particularly relates to a supporting structure for a temporary pier in pushing construction of a steel box girder of a self-anchored suspension bridge, which comprises a pier, a guide beam, a pushing machine and a temporary support, and the temporary support comprises an upper base plate, a lower base plate and a plurality of adjusting base plates. Butt joint grooves are formed in the tops of the lower base plate and the adjusting base plate respectively, and the bottoms of the upper base plate and the adjusting base plate protrude downwards respectively to form butt joint layers; according to the temporary support, the adjusting base plates are placed between the upper base plate and the lower base plate, the butt-joint layers are inserted into the corresponding butt-joint grooves below, the height of the temporary support can be adjusted by increasing or decreasing the number of the adjusting base plates, the butt-joint layers can be rapidly fixed into the butt-joint grooves through the butt-joint assemblies, and the temporary support is convenient to use. And the upper base plate, the lower base plate and the adjusting base plate can be quickly stacked and assembled into the temporary support.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, in particular to a supporting structure for temporary piers used in the jacking construction of a steel box girder of a self-anchored suspension bridge. Background Art

[0002] When a self-anchored suspension bridge uses the jacking method to install the steel box girder, a guide beam is usually installed at the front end of the steel box girder to prevent excessive deflection of the cantilever at the front end of the steel box girder. The guide beam first reaches the bridge pier, and a jacking machine is installed at the bottom of the guide beam on the pier. Although the guide beam is light in weight, it still produces a certain amount of deflection in the cantilever state, especially when it reaches the bridge pier, where the deflection is the largest. Therefore, to facilitate the installation of a jacking machine at the bottom of the guide beam, temporary supports are usually installed on the bridge pier. After the front end of the guide beam reaches the bridge pier, it is first supported on the temporary supports. Conventional temporary supports are integral structures, which are relatively heavy and difficult to transport and install on the bridge pier. The construction risk is high, and the height cannot be adjusted. During construction, pads of different specifications are required, resulting in a large waste of materials.

[0003] The existing Chinese patent with announcement number CN217174403U discloses a combined guide beam pier temporary support for steel box girder jacking construction, including multiple pads, each pad includes a rectangular top plate and a bottom plate, the length and width of the bottom plate are respectively greater than the length and width of the top plate, the top plate and the center of the bottom plate are directly opposite, four side plates are welded between the four sides of the top plate and the top surface of the bottom plate, a screw hole is provided at each of the four corners of the bottom plate, multiple pads are overlapped up and down, and a bolt is respectively passed through the upper and lower opposite screw holes of the bottom plate of each pad, and the upper end of each bolt is screwed to a fixing nut on the top surface of the bottom plate of the uppermost pad.

[0004] In view of the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: the device forms a temporary support by stacking multiple pads up and down, and the thickness of the pads is fixed, which makes the height adjustment of the temporary support relatively limited and cannot be fine-tuned; therefore, in order to solve the above problems, a support structure for temporary piers in the jacking construction of steel box girders of self-anchored suspension bridges is proposed. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve its technical problems is: the support structure for temporary piers for the jacking construction of steel box girders of a self-anchored suspension bridge described in the present invention comprises bridge piers, guide beams, jacking machines and temporary supports, the temporary supports comprise an upper pad, a lower pad and a plurality of adjustment pads, the tops of the lower pad and the adjustment pad are respectively provided with docking grooves, the bottoms of the upper pad and the adjustment pad are respectively protruded downward to form docking layers, a docking assembly is installed on the temporary support, the docking assembly comprises an L-shaped mounting cavity and a docking hole, the mounting cavity is respectively opened on both sides of the upper pad and the adjustment pad, the interior of the mounting cavity is slidably connected with an L-shaped docking plate, one side of the docking plate is fixedly connected with a plurality of springs, and the other end of the spring is fixedly mounted in the mounting cavity. Internally, the other side of the docking plate is fixedly connected to several docking posts extending through the mounting cavity. The docking holes are provided in the sidewalls of the docking slot. During use, the temporary support is adjusted so that the roller is lower than the bottom of the guide beam's front end. After the guide beam's front end successfully passes the temporary support and reaches the top of the jacking machine, the guide beam's forward movement is paused. The jacking machine lifts the guide beam upward by a certain height, increasing the roller's height. The rear jacking machine continues to push the guide beam forward. Once the guide beam's bottom plate reaches the top of the temporary support, the jacking machine is lowered to a height lower than the temporary support. The rear jacking machine continues to push the guide beam forward. When the guide beam's bottom plate reaches the top of the jacking machine, the jacking machine pauses, lifts the guide beam upward, and removes the temporary support. The jacking machine on the pier then works together with the rear jacking machine to push the steel box girder and guide beam forward. The temporary support is then disassembled and transferred to the top of the next pier for reuse.

[0007] By placing the adjustment pad between the upper pad and the lower pad, and inserting the docking layer into the corresponding docking groove below, the height of the temporary support can be adjusted by increasing or decreasing the number of adjustment pads. During the specific installation, push the docking plate to slide inward of the installation cavity so that the docking column slides into the docking layer, so that the docking layer can be inserted into the docking groove normally. Then release the docking plate, and the tension of the spring makes the docking column slide outward and insert into the corresponding docking hole, and then fix the docking layer in the docking groove, so that the upper pad, lower pad and adjustment pad can be quickly stacked and assembled into a temporary support. When the temporary support needs to be disassembled, push the docking plate inward so that the docking column exits the docking hole, and quick disassembly can be achieved.

[0008] Preferably, the surface of the docking plate is provided with grooves, which make it easier for construction workers to hold the docking plate, thereby facilitating the disassembly, assembly and transportation of the temporary support.

[0009] Preferably, the side walls of the upper pad, lower pad and adjustment pad are respectively fixedly connected with four moving wheels. After the temporary support is disassembled, the upper pad, lower pad and adjustment pad can be easily moved by the cooperation of the moving wheels and handles, saving physical energy of construction workers.

[0010] Preferably, the side walls of the upper pad, the lower pad and the adjustment pad are respectively fixedly connected with two handles.

[0011] Preferably, a mounting groove is provided on the top of the upper pad, and a support assembly is installed above the mounting groove. The support assembly includes a support platform, and the support platform is located directly above the mounting groove. After the temporary support is assembled, the two slides are driven to move toward or in opposite directions synchronously by rotating the bidirectional screw. Therefore, through the rotation cooperation of the bracket, the height of the roller can be quickly adjusted when the jacking machine lifts the guide beam upward to a certain height, so that the roller can support the guide beam and form rolling friction with the guide beam, which can reduce the friction of the guide beam movement and facilitate the forward movement of the guide beam.

[0012] Preferably, the support platform is configured to be U-shaped, and a roller is rotatably connected to the top of the support platform via an axis.

[0013] Preferably, the support assembly further includes two slides, which are slidably mounted inside the mounting groove, and the surface of the slide is rotatably connected to a plurality of brackets via an axis, and the top end of the bracket is rotatably connected to the support platform via an axis.

[0014] Preferably, a bidirectional lead screw is threadedly connected at the center of the two slides, both ends of the bidirectional lead screw pass through and are rotatably connected to the upper pad, and both ends of the bidirectional lead screw are fixedly connected to a hand wheel.

[0015] The utility model is beneficial in that:

[0016] 1. The utility model places the adjustment pad between the upper pad and the lower pad, and inserts the docking layer into the corresponding docking groove below. By increasing or decreasing the number of the adjustment pads, the height of the temporary support can be adjusted, and the docking layer can be quickly fixed in the docking groove through the docking assembly, so that the upper pad, the lower pad and the adjustment pad can be quickly stacked and assembled into a temporary support.

[0017] 2. The utility model drives the two slides to move toward or in opposite directions synchronously by rotating the bidirectional screw, so that the height of the roller can be quickly adjusted when the jacking machine lifts the guide beam to a certain height through the rotation coordination of the bracket, so that the roller can support the guide beam and form rolling friction with the guide beam, which can reduce the friction of the guide beam and facilitate the forward movement of the guide beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the expanded structure of the temporary support of the utility model;

[0021] Figure 3 This is a cross-sectional view of the adjusting pad of the utility model;

[0022] Figure 4 For this utility model Figure 3 Schematic diagram of the A structure;

[0023] Figure 5 This is a schematic diagram of the support assembly structure of the utility model.

[0024] In the figure: 1. Bridge pier; 2. Guide beam; 3. Pusher; 4. Temporary support; 41. Upper pad; 42. Lower pad; 43. Adjusting pad; 44. Docking groove; 45. Docking layer; 5. Docking assembly; 51. Mounting cavity; 52. Docking plate; 53. Spring; 54. Docking column; 55. Docking hole; 6. Slot; 7. Moving wheel; 8. Handle; 9. Support assembly; 91. Support platform; 92. Roller; 93. Slide; 94. Bracket; 95. Bidirectional screw; 10. Mounting groove. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] Example 1

[0027] See also Figure 1-4As shown, a support structure 1 for temporary piers for jacking construction of steel box girders of a self-anchored suspension bridge comprises a pier 1, a guide beam 2, a jacking machine 3 and a temporary support 4. The temporary support 4 comprises an upper pad 41, a lower pad 42 and a plurality of adjusting pads 43. The tops of the lower pad 42 and the adjusting pad 43 are respectively provided with docking grooves 44. The bottoms of the upper pad 41 and the adjusting pad 43 are respectively raised downward to form a docking layer 45. A docking assembly 5 is installed on the temporary support 4. The docking assembly 5 comprises an L-shaped mounting cavity 51 and a docking hole 55. The mounting cavity 51 is respectively opened on both sides of the upper pad 41 and the adjusting pad 43. An L-shaped docking plate 52 is slidably connected to the interior of the mounting cavity 51. One side of the docking plate 52 is fixedly connected to a plurality of springs 53, and the other end of the spring 53 is fixedly installed in the interior of the mounting cavity 51. The other side of the docking plate 52 is fixed Several docking posts 54 extending through the mounting cavity 51 are fixedly connected, and docking holes 55 are provided in the sidewalls of the docking slot 44. During use, the height of the temporary support 4 is adjusted so that the height of the roller 92 is lower than the height of the bottom end of the guide beam 2. After the bottom end of the guide beam 2 successfully passes through the temporary support 4 and reaches above the jacking machine 3, the guide beam 2 is paused from moving forward. The jacking machine 3 lifts the guide beam 2 upward by a certain height, raising the height of the roller 92. The jacking machine 3 then continues pushing the guide beam 2 forward from behind. After the bottom plate of the guide beam 2 reaches above the temporary support 4, the jacking machine 3 is lowered to a height lower than the temporary support 4. The jacking machine 3 continues pushing the guide beam 2 forward from behind. When the bottom plate of the guide beam 2 reaches above the jacking machine 3, the jacking is paused. The jacking machine 3 lifts the guide beam 2 upward, and the temporary support 4 is withdrawn. The jacking machine 3 on the pier 1 then works together with the jacking machine 3 behind to push the steel box girder and guide beam 2 forward. The temporary support 4 is then disassembled and moved to the top of the next pier 1 for reuse.

[0028] By placing the adjusting pad 43 between the upper pad 41 and the lower pad 42, and inserting the docking layer 45 into the corresponding docking groove 44 below, the height of the temporary support 4 can be adjusted by increasing or decreasing the number of adjusting pads 43. During specific installation, push the docking plate 52 to slide into the interior of the installation cavity 51, so that the docking column 54 slides into the docking layer 45, so that the docking layer 45 can be normally inserted into the docking groove 44, and then release the docking plate 52. The tension of the spring 53 causes the docking column 54 to slide outward and insert into the corresponding docking hole 55, and then fix the docking layer 45 in the docking groove 44, so that the upper pad 41, the lower pad 42 and the adjusting pad 43 can be quickly stacked and assembled into a temporary support 4. When the temporary support 4 needs to be disassembled, push the docking plate 52 inward so that the docking column 54 exits the docking hole 55, and rapid disassembly can be achieved.

[0029] The surface of the docking plate 52 is provided with a slot 6 , which makes it convenient for construction workers to hold the docking plate 52 , thereby facilitating the disassembly, assembly and transportation of the temporary support 4 .

[0030] The side walls of the upper pad 41, the lower pad 42 and the adjustment pad 43 are respectively fixedly connected with four moving wheels 7. After the temporary support 4 is disassembled, the upper pad 41, the lower pad 42 and the adjustment pad 43 can be easily moved by the cooperation of the moving wheels 7 and the handle 8, saving physical energy of the construction workers.

[0031] Two handles 8 are fixedly connected to the side walls of the upper pad 41 , the lower pad 42 and the adjustment pad 43 .

[0032] Example 2

[0033] For comparison with Example 1, please refer to Figure 5 As shown, the present invention provides another embodiment, a mounting groove 10 is opened on the top of the upper pad 41, and a support assembly 9 is installed above the mounting groove 10, and the support assembly 9 includes a support platform 91, and the support platform 91 is located directly above the mounting groove 10. After the temporary support 4 is assembled, the two slides 93 are driven to move toward each other or in the opposite direction synchronously by rotating the bidirectional screw 95, so that the height of the roller 92 can be quickly adjusted when the pushing machine 3 lifts the guide beam 2 to a certain height, so that the roller 92 can support the guide beam 2 and form rolling friction with the guide beam 2, which can reduce the friction of the guide beam 2 and facilitate the forward movement of the guide beam 2.

[0034] The support platform 91 is configured to be U-shaped, and a roller 92 is rotatably connected to the upper portion of the support platform 91 via an axis.

[0035] The support assembly 9 also includes two slides 93, which are slidably installed inside the installation groove 10. The surface of the slide 93 is connected to a plurality of brackets 94 through an axis, and the top of the bracket 94 is connected to the support platform 91 through an axis.

[0036] A bidirectional lead screw 95 is threadedly connected at the center of the two slides 93 , and both ends of the bidirectional lead screw 95 pass through and are rotatably connected to the upper pad 41 , and both ends of the bidirectional lead screw 95 are fixedly connected to hand wheels respectively.

[0037] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art.

[0038] Working principle: During use, the height of the temporary support 4 is adjusted so that the height of the roller 92 is lower than the height of the bottom of the front end of the guide beam 2. After the bottom of the guide beam 2 successfully passes through the temporary support 4 and reaches the top of the jacking machine 3, the guide beam 2 is suspended. The jacking machine 3 lifts the guide beam 2 upward to a certain height, increasing the height of the roller 92. The jacking machine 3 continues to push the guide beam 2 forward from behind. After the bottom plate of the guide beam 2 reaches the top of the temporary support 4, the jacking machine 3 is lowered to a height lower than the temporary support 4. The jacking machine 3 continues to push the guide beam 2 forward from behind. When the bottom plate of the guide beam 2 reaches the top of the jacking machine 3, the jacking is suspended. The jacking machine 3 lifts the guide beam 2 upward and the temporary support 4 is withdrawn. The jacking machine 3 on the pier 1 and the jacking machine 3 behind it then work together to push the steel box girder and guide beam 2 forward. The temporary support 4 is then disassembled and transferred to the top of the next pier 1 for recycling.

[0039] By placing the adjusting pad 43 between the upper pad 41 and the lower pad 42, and inserting the docking layer 45 into the corresponding docking groove 44 below, the height of the temporary support 4 can be adjusted by increasing or decreasing the number of adjusting pads 43. During specific installation, push the docking plate 52 to slide into the interior of the installation cavity 51, so that the docking column 54 slides into the docking layer 45, so that the docking layer 45 can be normally inserted into the docking groove 44, and then release the docking plate 52. The tension of the spring 53 causes the docking column 54 to slide outward and insert into the corresponding docking hole 55, and then fix the docking layer 45 in the docking groove 44, so that the upper pad 41, the lower pad 42 and the adjusting pad 43 can be quickly stacked and assembled into a temporary support 4. When the temporary support 4 needs to be disassembled, push the docking plate 52 inward so that the docking column 54 exits the docking hole 55, and rapid disassembly can be achieved.

[0040] After the temporary support 4 is assembled, the two slides 93 are driven to move synchronously toward or in opposite directions by rotating the bidirectional screw 95, so that through the rotation coordination of the bracket 94, the height of the roller 92 can be quickly adjusted when the pushing machine 3 lifts the guide beam 2 to a certain height, so that the roller 92 can support the guide beam 2 and form rolling friction with the guide beam 2, which can reduce the friction force of the guide beam 2 and facilitate the forward movement of the guide beam 2.

[0041] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0042] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A support structure for temporary piers in the jacking construction of a self-anchored suspension bridge steel box girder, comprising a pier (1), a guide beam (2), a jacking machine (3) and a temporary support (4), characterized in that: The temporary support (4) comprises an upper pad (41), a lower pad (42) and a plurality of adjustment pads (43), the tops of the lower pad (42) and the adjustment pad (43) are respectively provided with docking grooves (44), the bottoms of the upper pad (41) and the adjustment pad (43) are respectively convex downwards to form docking layers (45), a docking assembly (5) is installed on the temporary support (4), the docking assembly (5) comprises an L-shaped installation cavity (51) and a docking hole (55), the installation cavity (51) ) are respectively opened on both sides of the upper pad (41) and the adjustment pad (43); the interior of the installation cavity (51) is slidably connected with an L-shaped docking plate (52); one side of the docking plate (52) is fixedly connected with a plurality of springs (53), and the other end of the spring (53) is fixedly installed in the interior of the installation cavity (51); the other side of the docking plate (52) is fixedly connected with a plurality of docking columns (54) passing through the installation cavity (51); the docking hole (55) is opened on the side wall of the docking groove (44).

2. The support structure for temporary piers used in the jacking construction of a self-anchored suspension bridge steel box girder according to claim 1, characterized in that: The surface of the docking plate (52) is provided with a slot (6).

3. The supporting structure for temporary piers used in the jacking construction of a self-anchored suspension bridge steel box girder according to claim 1, characterized in that: Four moving wheels (7) are fixedly connected to the side walls of the upper pad (41), the lower pad (42) and the adjustment pad (43), respectively.

4. The support structure for temporary piers used in the jacking construction of a self-anchored suspension bridge steel box girder according to claim 1, characterized in that: The side walls of the upper pad (41), the lower pad (42) and the adjustment pad (43) are respectively fixedly connected to two handles (8).

5. The supporting structure for temporary piers used in the jacking construction of a self-anchored suspension bridge steel box girder according to claim 1, characterized in that: A mounting groove (10) is provided on the top of the upper pad (41), and a support assembly (9) is installed above the mounting groove (10). The support assembly (9) includes a support platform (91), and the support platform (91) is located directly above the mounting groove (10).

6. The supporting structure for temporary piers used in the jacking construction of a self-anchored suspension bridge steel box girder according to claim 5, characterized in that: The support platform (91) is configured to be U-shaped, and a roller (92) is rotatably connected to the upper portion of the support platform (91) via an axis.

7. The supporting structure for temporary piers used in the jacking construction of a self-anchored suspension bridge steel box girder according to claim 5, characterized in that: The support assembly (9) further includes two slides (93), the slides (93) being slidably mounted inside the mounting groove (10), the surfaces of the slides (93) being rotatably connected to a plurality of brackets (94) via an axis, and the top ends of the brackets (94) being rotatably connected to the support platform (91) via an axis.

8. The supporting structure for temporary piers used in the jacking construction of a self-anchored suspension bridge steel box girder according to claim 7, characterized in that: A bidirectional lead screw (95) is threadedly connected at the center of the two slides (93), and both ends of the bidirectional lead screw (95) pass through and are rotatably connected to the upper pad (41), and both ends of the bidirectional lead screw (95) are fixedly connected to a hand wheel.

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