Self-anchored suspension bridge steel box girder sectional jacking equipment and jacking method thereof

Abstract

The present invention discloses a split-box launching equipment for the steel box girder of a self-anchored suspension bridge, which includes a first arc-shaped support structure, a second arc-shaped support structure, and a support base installed at the bottom ends of the first arc-shaped support structure and the second arc-shaped support structure. The first arc-shaped support structure includes at least two first arc-shaped pads fixed above the support base. The second arc-shaped support structure includes a second arc-shaped pad located between the two first arc-shaped pads, a jacking mechanism connecting the second arc-shaped pad and the support base, and a translation mechanism for driving the second arc-shaped pad to move between the two first arc-shaped pads. Grooves adapted to the convex blocks at the bottom of the steel box girder are provided on the top end faces of the first arc-shaped pads and the second arc-shaped pads. The split-box launching equipment for the steel box girder of the self-anchored suspension bridge proposed by the present invention solves the drawback that the existing launching equipment cannot adapt to the launching operation at the bottom of the arc section beam, saves a large amount of welding, demolition, repair work and materials of temporary structures, and is energy-saving and environmentally friendly while improving the construction efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and particularly relates to a split-box jacking equipment for a self-anchored suspension bridge steel box girder and a jacking method thereof. Background Art

[0002] Long-span bridges such as suspension bridges and cable-stayed bridges are currently widely constructed at home and abroad due to their powerful spanning ability. When constructing by traditional methods, usually the main girder is constructed first and then the bridge tower, or the bridge tower is constructed first and then the main girder is constructed, that is, the construction method of beam first and tower later or tower first and beam later is adopted. This makes the bridge construction period prolonged. Therefore, in order to improve the construction efficiency and shorten the construction period, sometimes the method of synchronous construction of the bridge tower and the main girder is adopted, that is, tower-beam synchronous construction. When constructing the main girder by the tower-beam synchronous method, it is necessary to divide the main girder into two parts in the middle and carry out split-box jacking construction. When arranging the jacking equipment at the bottom of the beam, due to the need of structural force, it is often inevitable to arrange the jacking equipment at the arc section at the bottom of the beam. The existing jacking equipment has the following problems:

[0003] 1. In order to provide sufficient jacking force, a large number of jacks need to be set for the existing jacking equipment, which has high requirements for the equipment and low jacking efficiency;

[0004] 2. The existing jacking equipment cannot adapt to the circular arc-shaped beam bottom, and a large number of temporary structures need to be set at the bottom of the beam, resulting in a large amount of welding, demolition and repair work, which is time-consuming and laborious, wastes materials, and affects the construction period. Summary of the Invention

[0005] The main purpose of the present invention is to provide a split-box jacking equipment for a self-anchored suspension bridge steel box girder and a jacking method thereof, aiming to complete the jacking of the beam bottom of the arc section.

[0006] To achieve the above purpose, the present invention provides a split-box jacking equipment for a self-anchored suspension bridge steel box girder, including a first arc support structure, a second arc support structure, and a support base installed at the bottom ends of the first arc support structure and the second arc support structure. Among them,

[0007] The first arc support structure includes at least two first arc pads fixed above the support base. The second arc support structure includes a second arc pad located between the two first arc pads, a jacking mechanism connecting the second arc pad and the support base, and a translation mechanism for driving the second arc pad to move between the two first arc pads. Grooves for adapting to the convex blocks at the bottom of the steel box girder are provided on the top end surfaces of the first arc pad and the second arc pad.

[0008] Preferably, the jacking mechanism is a plurality of jacking cylinders installed between the second arc pad and the support base.

[0009] Preferably, the translation mechanism includes a sliding block installed between the jacking oil cylinder and the support base, and a flat-pushing oil cylinder connected to the sliding block. The cylinder block of the flat-pushing oil cylinder is installed on the support base.

[0010] Preferably, a slide rail adapted to the sliding block is installed on the support base.

[0011] Preferably, the first arc-shaped cushion block and the support base are connected by at least two columns.

[0012] Preferably, the columns are connected to the first arc-shaped cushion block and the support base by welding.

[0013] Preferably, both the first arc-shaped cushion block and the second arc-shaped cushion block include a top plate and a bottom plate arranged oppositely, and rib plates connecting between the top plates. There are multiple rib plates, multiple grooves are arranged on the top plate, and the inclination angle of the top plate is adapted to the bottom end face of the beam.

[0014] Preferably, the first arc-shaped cushion block and the second arc-shaped cushion block are in the length direction in the direction parallel to the slide rail, and the length of the second arc-shaped cushion block is greater than that of the first arc-shaped cushion block.

[0015] Preferably, at least two rows and at least two columns of grooves are arranged on both the first arc-shaped cushion block and the second arc-shaped cushion block.

[0016] The present invention further provides a jacking method based on the above self-anchored suspension bridge steel box girder sectional jacking equipment, including the following steps:

[0017] Control the jacking mechanism to extend to drive the second arc-shaped cushion block to jack up, so that the steel beam convex block is embedded into the groove of the second arc-shaped cushion block, and at the same time the steel beam convex block disengages from the groove of the first arc-shaped cushion block;

[0018] Control the translation mechanism to work to drive the second arc-shaped cushion block to move between the two first arc-shaped cushion blocks, and then drive the steel box girder to move;

[0019] When the translation mechanism moves to the maximum stroke, control the jacking mechanism to retract to drive the second arc-shaped cushion block to descend, the steel beam convex block is embedded into the groove of the first arc-shaped cushion block, and at the same time the steel beam convex block disengages from the groove of the second arc-shaped cushion block;

[0020] Control the translation mechanism to retract to reset the second arc-shaped cushion block;

[0021] Repeat the above steps until the steel box girder is jacked to the target position.

[0022] The self-anchored suspension bridge steel box girder sectional incremental launching equipment proposed by the present invention solves the drawback that the existing incremental launching equipment cannot adapt to the incremental launching operation of the beam bottom in the circular arc section by arranging the first arc-shaped cushion block and the second arc-shaped cushion block to cooperate with the convex block at the bottom of the steel box girder, and drives the incremental launching of the steel box girder by the movement of the second arc-shaped cushion block. A large amount of welding, demolition, repair work and materials of temporary structures are saved, and energy is saved and the environment is protected while improving the construction efficiency. In addition, the self-anchored suspension bridge steel box girder sectional incremental launching equipment of the present invention also has the advantages of simple structure, stable and reliable operation, and easy implementation. Brief Description of the Drawings

[0023] Figure 1 It is a schematic three-dimensional structure diagram of a preferred embodiment of the self-anchored suspension bridge steel box girder sectional incremental launching equipment of the present invention;

[0024] Figure 2 It is an exploded structure diagram of a preferred embodiment of the self-anchored suspension bridge steel box girder sectional incremental launching equipment of the present invention;

[0025] Figure 3 It is a schematic structure diagram of the self-anchored suspension bridge steel box girder sectional incremental launching equipment of the present invention when used in cooperation with the steel box girder;

[0026] Figure 4 It is a schematic side structure diagram of the steel box girder used in cooperation with the self-anchored suspension bridge steel box girder sectional incremental launching equipment of the present invention;

[0027] Figure 5 It is a schematic bottom structure diagram of the steel box girder used in cooperation with the self-anchored suspension bridge steel box girder sectional incremental launching equipment of the present invention;

[0028] Figure 6 It is a schematic structure diagram of the self-anchored suspension bridge steel box girder sectional incremental launching equipment when the jacking mechanism extends;

[0029] Figure 7 It is a schematic structure diagram of the self-anchored suspension bridge steel box girder sectional incremental launching equipment when the translation mechanism moves in place;

[0030] Figure 8 It is a schematic structure diagram of the self-anchored suspension bridge steel box girder sectional incremental launching equipment when the jacking mechanism retracts;

[0031] Figure 9 It is a schematic structure diagram of the self-anchored suspension bridge steel box girder sectional incremental launching equipment when the second arc-shaped cushion block is reset.

[0032] In the figure, 1 - the first arc-shaped cushion block, 2 - the second arc-shaped cushion block, 3 - the jacking oil cylinder, 4 - the horizontal pushing oil cylinder, 5 - the sliding block, 6 - the column, 7 - the support base, 8 - the groove, 9 - the convex block, 10 - the steel pipe support, 11 - the steel box girder.

[0033] The implementation, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0034] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0035] It should be noted that in the description of the present invention, the orientation or positional relationship indicated by the terms "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0036] The present invention provides a jacking equipment for the sectional jacking of a steel box girder of a self-anchored suspension bridge.

[0037] Referring to Figures 1 to 5 , in this preferred embodiment, a jacking equipment for the sectional jacking of a steel box girder of a self-anchored suspension bridge includes a first arc-shaped support structure, a second arc-shaped support structure, and a support base 7 installed at the bottom ends of the first arc-shaped support structure and the second arc-shaped support structure. Among them,

[0038] The first arc-shaped support structure includes at least two first arc-shaped pads 1 fixed above the support base 7. The second arc-shaped support structure includes a second arc-shaped pad 2 located between the two first arc-shaped pads 1, a jacking mechanism connecting the second arc-shaped pad 2 and the support base 7, and a translation mechanism for driving the second arc-shaped pad 2 to move between the two first arc-shaped pads 1. Grooves 8 adapted to the convex blocks 9 at the bottom of the steel box girder are provided on the top end surfaces of the first arc-shaped pad 1 and the second arc-shaped pad 2.

[0039] Specifically, in this embodiment, referring to Figure 1 and Figure 2 , the jacking mechanism is a plurality of jacking oil cylinders installed between the second arc-shaped pad 2 and the support base 7 (taking 4 jacking oil cylinders as an example for specific illustration in the figure).

[0040] In this embodiment, a specific structure of the translation mechanism is proposed: the translation mechanism includes a sliding block 5 installed between the jacking oil cylinder and the support base 7 and a flat-pushing oil cylinder 4 connected to the sliding block 5. The oil cylinder seat of the flat-pushing oil cylinder 4 is installed on the support base 7.

[0041] Furthermore, a slide rail adapted to the sliding block 5 is installed on the support base 7. By providing the slide rail, the sliding of the sliding block 5 becomes smoother.

[0042] In this embodiment, referring to Figure 2 , the first arc-shaped cushion block 1 and the support base 7 are connected by at least two columns 6. The columns 6 are connected to both the first arc-shaped cushion block 1 and the support base 7 by welding.

[0043] Specifically, both the first arc-shaped cushion block 1 and the second arc-shaped cushion block 2 include a top plate and a bottom plate arranged oppositely and rib plates connecting the top plates. There are multiple rib plates. Multiple grooves 8 are provided on the top plate, and the inclination angle of the top plate is adapted to the bottom end face of the beam. The first arc-shaped cushion block 1 and the second arc-shaped cushion block 2 have their length directions in the direction parallel to the slide rail, and the length of the second arc-shaped cushion block 2 is greater than that of the first arc-shaped cushion block 1. At least two rows and at least two columns of grooves 8 are provided on both the first arc-shaped cushion block 1 and the second arc-shaped cushion block 2 to stably support the steel box girder 11.

[0044] Referring to Figures 6 to 9 , the working process of the steel box girder sectional jacking equipment of this self-anchored suspension bridge is as follows:

[0045] 1. Control the lifting mechanism to extend to drive the second arc-shaped cushion block 2 to lift upward, so that the steel beam convex block 9 is embedded into the groove 8 of the second arc-shaped cushion block 2. At the same time, the steel beam convex block 9 disengages from the groove 8 of the first arc-shaped cushion block 1, as shown in Figure 6 ;

[0046] 2. Control the translation mechanism to work to drive the second arc-shaped cushion block 2 to move between the two first arc-shaped cushion blocks 1, and then drive the steel box girder 11 to move, as shown in Figure 7 ;

[0047] 3. When the translation mechanism moves to the maximum stroke, control the lifting mechanism to retract to drive the second arc-shaped cushion block 2 to descend, and the steel beam convex block 9 is embedded into the groove 8 of the first arc-shaped cushion block 1. At the same time, the steel beam convex block 9 disengages from the groove 8 of the second arc-shaped cushion block 2, as shown in Figure 8 ;

[0048] 4. Control the translation mechanism to retract to reset the second arc-shaped cushion block 2, as shown in Figure 9 ;

[0049] 5. Repeat the above steps 1 to 4 until the steel box girder 11 is jacked to the target position.

[0050] The self-anchored suspension bridge steel box girder sectional incremental launching equipment proposed by the present invention solves the drawback that the existing incremental launching equipment cannot adapt to the incremental launching operation at the bottom of the circular arc section by arranging the first arc-shaped cushion block 1 and the second arc-shaped cushion block 2 to cooperate with the convex block 9 at the bottom of the steel box girder 11, and drives the incremental launching of the steel box girder 11 by the movement of the second arc-shaped cushion block 2, saving a large amount of welding, demolition, repair work and materials of temporary structures, and being energy-saving and environmentally friendly while improving the construction efficiency. At the same time, this incremental launching equipment requires fewer jacks and has a high incremental launching efficiency. In addition, the self-anchored suspension bridge steel box girder sectional incremental launching equipment of the present invention also has the advantages of simple structure, stable and reliable operation, and easy implementation.

[0051] The present invention further provides a method for incremental launching of a self-anchored suspension bridge steel box girder sectional incremental launching equipment.

[0052] Referring to Figures 6 to 9 , in this preferred embodiment, a method for incremental launching of a self-anchored suspension bridge steel box girder sectional incremental launching equipment based on the above includes the following steps:

[0053] Step S10: Control the lifting mechanism to extend to drive the second arc-shaped cushion block 2 to lift upwards, so that the convex block 9 of the steel girder is embedded in the groove 8 of the second arc-shaped cushion block 2, and at the same time, the convex block 9 of the steel girder disengages from the groove 8 of the first arc-shaped cushion block 1;

[0054] Step S20: Control the translation mechanism to work to drive the second arc-shaped cushion block 2 to move between the two first arc-shaped cushion blocks 1, thereby driving the steel box girder 11 to move;

[0055] Step S30: When the translation mechanism moves to the maximum stroke, control the lifting mechanism to retract to drive the second arc-shaped cushion block 2 to descend, the convex block 9 of the steel girder is embedded in the groove 8 of the first arc-shaped cushion block 1, and at the same time, the convex block 9 of the steel girder disengages from the groove 8 of the second arc-shaped cushion block 2;

[0056] Step S40: Control the translation mechanism to retract to reset the second arc-shaped cushion block 2;

[0057] Step S50: Repeat the above steps S40 to S40 until the steel box girder 11 is incrementally launched to the target position.

[0058] The incremental launching method proposed by the present invention is simple in construction, easy to operate, and has high construction efficiency.

[0059] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made by using the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present invention by the same token.

Claims

1. A self-anchored suspension bridge steel box girder jacking device, characterized in that: It includes a first arc-shaped support structure, a second arc-shaped support structure, and a support base installed at the bottom ends of the first arc-shaped support structure and the second arc-shaped support structure, wherein: The first arc-shaped support structure includes at least two first arc-shaped pads fixed above the support base, the second arc-shaped support structure includes a second arc-shaped pad located between the two first arc-shaped pads, a lifting mechanism connecting the second arc-shaped pad and the support base, and a translation mechanism for driving the second arc-shaped pad to move between the two first arc-shaped pads, and grooves for matching with the bottom protrusions of the steel box girder are provided on the top surfaces of the first arc-shaped pad and the second arc-shaped pad; the lifting mechanism is a plurality of lifting cylinders installed between the second arc-shaped pad and the support base; the translation mechanism includes a sliding block installed between the lifting cylinder and the support base and a push cylinder connected to the sliding block, and the cylinder seat of the push cylinder is installed on the support base; a slide rail for matching with the sliding block is installed on the support base.

2. The self-anchored suspension bridge steel box girder jacking device according to claim 1, characterized in that: The first arc-shaped pad is connected to the support base via at least two columns.

3. The self-anchored suspension bridge steel box girder jacking device according to claim 2, characterized in that: The column is connected to the first arc-shaped pad and the support base by welding.

4. The self-anchored suspension bridge steel box girder jacking device according to claim 1, characterized in that: The first arc-shaped pad and the second arc-shaped pad both include a top plate and a bottom plate arranged opposite to each other and a rib plate connecting the top plate and the top plate. There are multiple rib plates, and multiple grooves are arranged on the top plate. The inclination angle of the top plate is adapted to the bottom end face of the beam.

5. The self-anchored suspension bridge steel box girder jacking device according to claim 4, characterized in that: The first arc-shaped cushion block and the second arc-shaped cushion block are in the length direction parallel to the slide rail, and the length of the second arc-shaped cushion block is greater than the length of the first arc-shaped cushion block.

6. The self-anchored suspension bridge steel box girder jacking device according to any one of claims 1 to 5, characterized in that: The grooves on the first arc-shaped pad and the second arc-shaped pad are both provided with at least two rows and at least two columns.

7. A method for pushing the steel box girder of a self-anchored suspension bridge based on the self-anchored suspension bridge steel box girder pushing device according to any one of claims 1 to 6, characterized in that: The following steps are involved: Control the lifting mechanism to extend to drive the second arc-shaped pad to lift upward, so that the steel beam protrusion is embedded in the groove of the second arc-shaped pad, and the steel beam protrusion is separated from the groove of the first arc-shaped pad; Control the translation mechanism to drive the second arc-shaped pad to move between the two first arc-shaped pads, thereby driving the steel box girder to move; When the translation mechanism moves to the maximum stroke, the lifting mechanism is controlled to retract to drive the second arc-shaped pad down, the steel beam protrusion is embedded in the groove of the first arc-shaped pad, and the steel beam protrusion is separated from the groove of the second arc-shaped pad; Controlling the translation mechanism to retract and reset the second arc-shaped pad; Repeat the above steps until the steel box girder is pushed to the target position.

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