CN111232835A - Steel-concrete combined beam lifting station and assembling and disassembling method thereof - Google Patents

Abstract

The invention relates to a steel-concrete composite beam lifting station, which comprises two rows of steel pipe pile rows arranged at two sides of a constructed bridge, wherein each row of steel pipe pile rows comprises at least two steel pipe piles arranged in parallel, and each steel pipe pile is vertical to the ground where the constructed bridge is located; each steel pipe pile is provided with a lifting device; each row of main trusses is hoisted to the corresponding row of steel pipe pile rows by the hoisting device, and the main trusses are positioned above the position of the bridge deck of the bridge to be constructed; and the gantry lifting appliance comprises lifting frames and a movable lifting appliance, the lifting frames are transversely arranged on the two rows of main trusses, the longitudinal direction of each lifting frame is vertical to the longitudinal direction of each main truss, and the movable lifting appliance is movably arranged on each lifting frame and can move on the lifting frame along the longitudinal direction of the corresponding lifting frame.

Description

Steel-concrete combined beam lifting station and assembling and disassembling method thereof

Technical Field

The invention relates to a steel-concrete composite beam lifting station and an installation method thereof.

Background

The steel-concrete composite beam used for the bridge deck generally consists of a steel beam stage and a bridge deck, the conventional steel beam adopts a hollow-web type channel beam, the bridge deck is a solid concrete slab, the weight of the steel beam can reach 1.9 ten thousand tons, the weight of the bridge deck can reach 100 tons, and the bridge deck has a large construction span, so that the implementation difficulty is large if a conventional crane is adopted under the common condition.

Disclosure of Invention

The invention aims to provide a steel-concrete combined beam lifting station which is simple in structure and convenient to implement.

In order to achieve the purpose, the invention provides the following technical scheme: a steel-concrete combined beam lifting station comprises

Two rows of steel pipe pile rows are arranged on two sides of a constructed bridge, each row of steel pipe pile rows comprises at least two steel pipe piles which are arranged in parallel, and each steel pipe pile is vertical to the ground where the constructed bridge is located;

each steel pipe pile is provided with a lifting device;

each row of main trusses is hoisted to the corresponding row of steel pipe pile rows by the hoisting device, and the main trusses are positioned above the position of the bridge deck of the bridge to be constructed; and the number of the first and second groups,

the gantry lifting appliance comprises lifting frames and a movable lifting appliance, the lifting frames are transversely arranged on the two rows of main trusses, the longitudinal direction of the lifting frames is vertical to the longitudinal direction of the main trusses, and the movable lifting appliance is movably arranged on the lifting frames and can move on the lifting frames along the longitudinal direction of the lifting frames.

Furthermore, each steel pipe pile is connected with the main truss through a distribution beam, each steel pipe pile comprises a first frame body and a second frame body which are arranged oppositely, the main truss can move between the first frame body and the second frame body along the height direction of the steel pipe pile, and the distribution beam has a first position which enables the distribution beam not to be connected with the steel pipe pile and a second position which enables the distribution beam to be connected with the steel pipe pile relative to the main truss; and when the distribution beam moves to the preset installation position of the steel pipe pile along with the main truss, the distribution beam rotates relative to the truss section to be converted from the first position to the second position.

Furthermore, each row of the main truss is formed by splicing a plurality of sections of truss sections, each section of truss section is fixed between two adjacent steel pipe piles, and the distribution beam is arranged between each section of truss section and each steel pipe pile.

Furthermore, the distribution beam is abutted against the lower part of the main truss, and in the first position, the distribution beam is hung below the main truss through a steel wire rope.

Further, the distribution beam is rotatable relative to the main girder to move from a first position to a second position.

Furthermore, the steel-concrete composite beam lifting station further comprises connecting beams transversely arranged on the two rows of main trusses.

The invention also relates to an assembling and disassembling method of the steel-concrete composite beam lifting station, which comprises the following steps:

s1: two rows of steel pipe pile rows are laid on two sides of a constructed bridge, each row of steel pipe pile rows comprises at least two steel pipe piles which are arranged in parallel, and each steel pipe pile is vertical to the ground where the constructed bridge is located;

s2: a lifting device is arranged on each steel pipe pile,

s3: assembling two rows of main trusses and a gantry lifting appliance: splicing two rows of main trusses between two rows of steel pipe pile rows, wherein each row of truss consists of a plurality of truss sections, installing a gantry hanger on the two rows of main trusses, wherein the gantry hanger comprises a hanger arranged between the two rows of main trusses and a movable hanger arranged on the hanger, the movable hanger can move on the hanger, and distribution beams are arranged on the main trusses;

s4: and synchronously lifting two rows of main trusses and a gantry lifting appliance by adopting a lifting device until the distribution beam moves to the preset mounting position of the steel pipe pile along with the main trusses, and moving the distribution beam to enable the distribution beam to be in butt joint with the corresponding steel pipe pile.

Further, the step S2 includes in detail:

placing a distribution beam at a corresponding position on the ground where the steel pipe pile is located;

assembling a multi-section truss and a gantry lifting appliance into an integral structure at corresponding positions of the two rows of steel pipe pile rows;

hoisting each row of main trusses for a distance relative to the ground;

and the distribution beam is hung below the truss by using a steel wire rope.

Further, the step S3 includes in detail:

synchronously lifting two rows of main trusses by adopting a lifting device until a distribution beam moves to a preset mounting position of the steel pipe pile along with the main trusses;

and rotating the distribution beam by 90 degrees relative to the main truss to enable the distribution beam to be in butt joint with the corresponding steel pipe pile.

Further, the disassembling and assembling method comprises the following steps:

arranging a temporary buttress on the bridge floor as a fulcrum for detaching the overhead crane beam after the overhead crane beam is lowered, moving the overhead crane beam to be right above the bridge floor buttress, lowering the gantry lifting appliance to be below the main truss of the girder station, and cutting off the middle part of the temporary buttress above the bridge floor in a parallel connection manner; forming temporary supporting points which are used as main trusses and are placed to the rear end part of the bridge deck at the positions between the pipe piles close to the outer side of the temporary buttress, and the positions are as high as the bridge deck;

the main truss and the gantry lifting appliance are put down to the bridge floor; filling a gap between the temporary bridge deck buttress and the gantry hanger with a steel plate;

removing the lifting device, and cutting the steel pipe pile to be as high as the bridge floor; the truck is hoisted to the bridge; dismantling a section of main truss on the bridge deck;

the truck crane drives into the space between the main trusses from the gap; dismantling the gantry crane; dismantling the crown block beam section by section; continuously dismantling the rest main truss on the bridge deck; and (5) dismantling the temporary buttress and the rest steel pipe piles.

The invention has the beneficial effects that: the steel-concrete composite beam lifting station has a simple structure, can be directly built and disassembled on the ground during building implementation, can improve the working efficiency by adopting the steel-concrete composite beam lifting station, and is particularly suitable for the construction of large bridges (such as elevated frames). Moreover, the steel-concrete composite beam lifting station has low geological requirement and wide adaptability.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

Fig. 1 is a front view of a steel-concrete composite girder lifting station according to an embodiment of the present invention;

FIG. 2 is a side view of the steel and concrete composite beam lift station shown in FIG. 1;

FIG. 3 is a top view of the steel and concrete composite beam lift station shown in FIG. 1;

FIG. 4 is a schematic view of the assembled main truss and gantry spreader in a lifted state by a lifting device;

FIG. 5 is a schematic view showing the state of the main truss and the gantry crane passing through the lower part of the lifting device to the bridge floor.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

Referring to fig. 1 to 3 in combination with fig. 4, a steel-concrete composite beam lifting station according to a preferred embodiment of the present invention includes: two rows of steel pipe pile rows 10, several lifting devices 50 (as shown in fig. 4), two rows of main trusses 20, and a gantry spreader 30. Two rows of steel pipe pile rows 10 are arranged on two sides of a constructed bridge, each row of steel pipe pile rows 10 comprises at least two steel pipe piles 11 arranged in parallel, and each steel pipe pile 11 is perpendicular to the ground where the constructed bridge is located. Each steel pipe pile 11 is provided with a lifting device 50. Each row of the main trusses 20 is hoisted to a corresponding row of the steel pipe pile rows 10 by the hoisting device 50, and the main trusses 20 are located above a position where a deck (not shown) of a bridge to be constructed is located. The gantry crane 30 comprises a hanger 31 and a mobile crane 32, the hanger 31 is transversely arranged on two rows of the main trusses 20, the longitudinal direction of the hanger 31 is vertical to the longitudinal direction of the main trusses 20, the mobile crane 32 is movably arranged on the hanger 31 and can move on the hanger 31 along the longitudinal direction of the hanger 31, and the connection mode between the hanger 31 and the mobile crane 32 is as follows: the hanger 31 is provided with a slide rail 33, the mobile lifting appliance 32 is provided with a mobile seat 34 matched with the slide rail 33, and the mobile seat 34 is driven by a driving device 35 to move on the slide rail 33 along the longitudinal direction of the hanger 31.

In this embodiment, in order to reinforce the strength of the integral steel-concrete composite girder lifting station, the steel-concrete composite girder lifting station further includes a connection beam 40 transversely disposed on the two rows of the main trusses 20. In the present embodiment, the lifting device 50 is a jack, but in other embodiments, other lifting devices 50 may be used.

In this embodiment, each of the steel pipe piles 11 is connected to the main truss 20 by a distribution beam (not numbered), each of the steel pipe piles 11 includes a first frame body 12 and a second frame body 13 which are disposed opposite to each other, the main truss 20 is movable in a height direction of the steel pipe pile 11 between the first frame body 12 and the second frame body 13, and the distribution beam has a first position (not shown) where the distribution beam is not connected to the steel pipe pile 11 and a second position (not numbered) where the distribution beam is connected to the steel pipe pile 11 with respect to the main truss 20; after the distributor beam is moved with the main girder 20 to a predetermined installation position of the steel pipe pile 11 (a position indicated by an arrow a in fig. 4, which is lower than a position where the jack 50 is located, in a conventional arrangement, the jack 50 is usually located at the top of the steel pipe pile 11), the distributor beam is rotated with respect to the girder segments to be transferred from the first position to the second position. Specifically, each row of the main truss 20 is formed by splicing a plurality of truss sections (not numbered), each truss section is fixed between two adjacent steel pipe piles 11, and the distribution beam is arranged between each truss section and each steel pipe pile 11. The distributor beams rest against the underside of the main girder 20, although in practice it is of course possible to arrange the distributor beams above or at the sides of the main girder 20, but by arranging the distributor beams below the main girder 20, so that the forces of the main girder 20 are directly received by the distributor beams, and the 'arrangement of the distributor beams below the main girder 20' does not require consideration of the force-receiving problem, as compared with the 'arrangement of the distributor beams above the main girder 20', and the connection between the distribution beam and the main girder 20 can be accomplished by a simple fastener or a wire rope, or they may be disconnected from each other, but when the distribution beam is at the second position, the distribution beam is connected to the steel pipe pile 11, the main truss 20 is connected to the steel pipe pile 11, in addition, regardless of whether the distributor beam is directly connected to the main girder 20 or the distributor beam and the main girder 20 are respectively connected to the steel pipe piles, the connection method may be any method as long as the main truss 20 is restricted from moving in the longitudinal direction of the main truss 20 with respect to the steel pipe pile.

In the first position, the distributor beam is suspended below the main girder 20 by a wire rope (not shown), but in other embodiments, the distributor beam may be connected below the main girder 20 by another structure. In addition, in this embodiment, the distribution beam is rotatable relative to the main girder 20 to move from the first position to the second position. In other embodiments, the spreader beam may be a pull-out connection with the main truss 20, etc. In practice, the main truss 20 and the gantry crane 30 are usually installed as an integral structure, and then lifted to the specified position of the steel pipe pile 11 by the jack 50 (as indicated by arrow a in fig. 4), and finally, the jack 50 and the steel pipe pile 11 part above the position a are removed (the final effect is shown in fig. 1).

The materials and characteristics of the steel pipe pile 11, the main truss 20, the distribution beam, the jack 50 and the gantry hanger 30 are selected according to actual requirements, wherein the steel pipe pile 11 can be of two different types, which are divided intoThe bearing performance of the main bearing structure is superior to that of the auxiliary structure. The main truss 20 can adopt a triangular main truss 20 structure, two adjacent truss sections are connected through high-strength bolts, the upper chord member and the lower chord member of the triangular main truss 20 can be made of Q345 steel, and the middle reinforcing rods and the web members adopt Q235 steel. The main truss girder is of a space truss structure as a whole. And in order to ensure the overall stability of the lifting station, the method adopts

The steel pipe connects and fixes two adjacent sections of truss sections.

The assembling and disassembling method of the steel-concrete composite beam lifting station comprises an assembling method and a disassembling method.

Referring to fig. 1 to 4, the installation method includes:

s1: two rows of steel pipe pile rows 10 are laid on two sides of a constructed bridge, each row of steel pipe pile rows 10 comprises at least two steel pipe piles 11 arranged in parallel, and each steel pipe pile 11 is vertical to the ground where the constructed bridge is located;

s2: installing a lifting device 50 on each steel pipe pile 11;

s3: assembling two rows of main trusses 20 and a gantry hanger 30: splicing two rows of main trusses 20 between two rows of steel pipe pile rows 10, wherein each row of trusses is composed of a plurality of truss sections, installing a gantry hanger 30 on the two rows of main trusses 20, wherein the gantry hanger 30 comprises a hanger 31 installed between the two rows of main trusses 20 and a movable hanger 32 installed on the hanger 31, the movable hanger 32 can move on the hanger 31, and distribution beams are arranged on the main trusses 20;

s4: and synchronously lifting two rows of main trusses 20 and a gantry lifting appliance 30 by adopting a lifting device 50 until the distribution beam moves to the preset installation position of the steel pipe pile along with the main trusses 20, and moving the distribution beam to enable the distribution beam to be in butt joint with the corresponding steel pipe pile 11.

Referring to fig. 1 to 3 and fig. 5, the disassembling method includes:

arranging a temporary buttress 70 on the bridge floor 60 as a fulcrum for detaching the overhead crane beam after the lowering, moving the overhead crane beam to the position right above the buttress of the bridge floor 60, lowering the gantry lifting appliance 30 to the position below the girder station main truss 20, and cutting off the middle part of the temporary buttress 70 above the bridge floor 60 in a parallel connection manner; forming temporary supporting points which are used as main trusses 20 and are lowered to the rear end part of the bridge deck 60 between the pipe piles close to the outer side of the temporary buttress 70 and are as high as the bridge deck 60 plate;

the main truss 20 and the gantry crane 30 are put down to the bridge floor 60; the gap between the temporary buttress 70 of the bridge deck 60 and the gantry crane 30 is padded by steel plates;

removing the lifting device 50, and cutting the steel pipe pile 11 to be equal to the bridge floor 60 in height; the truck is hoisted to the bridge; dismantling a section of the main truss 20 on the bridge deck 60;

the truck crane drives into the gap between the main trusses 20; dismantling the gantry crane 30; dismantling the crown block beam section by section; continuing to demolish the remaining main girders 20 on the deck 60; and (5) removing the temporary buttress 70 and the rest of the steel pipe pile 11.

In this embodiment, the step S2 includes:

placing a distribution beam at a corresponding position on the ground where the steel pipe pile 11 is located;

assembling a multi-section truss and a gantry lifting appliance 30 into an integral structure at corresponding positions of the two rows of steel pipe pile rows 10;

hoisting each row of main trusses 20 a distance relative to the ground;

and the distribution beam is hung below the truss by using a steel wire rope.

In this embodiment, the step S3 includes:

synchronously lifting two rows of main trusses 20 by using a lifting device 50 until a distribution beam moves to a preset installation position of the steel pipe pile along with the main trusses 20;

and rotating the distribution beam by 90 degrees relative to the main truss 20 to enable the distribution beam to be in butt joint with the corresponding steel pipe pile 11.

In conclusion, the steel-concrete composite beam lifting station has a simple structure, can be directly built and disassembled on the ground of building implementation, can improve the working efficiency by adopting the steel-concrete composite beam lifting station, and is particularly suitable for the construction of large bridges (such as elevated bridges). Moreover, the steel-concrete composite beam lifting station has low geological requirement and wide adaptability.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A steel-concrete combined beam lifting station is characterized by comprising

Two rows of steel pipe pile rows are arranged on two sides of a constructed bridge, each row of steel pipe pile rows comprises at least two steel pipe piles which are arranged in parallel, and each steel pipe pile is vertical to the ground where the constructed bridge is located;

each steel pipe pile is provided with a lifting device;

each row of main trusses is hoisted to the corresponding row of steel pipe pile rows by the hoisting device, and the main trusses are positioned above the position of the bridge deck of the bridge to be constructed; and the number of the first and second groups,

the gantry lifting appliance comprises lifting frames and a movable lifting appliance, the lifting frames are transversely arranged on the two rows of main trusses, the longitudinal direction of the lifting frames is vertical to the longitudinal direction of the main trusses, and the movable lifting appliance is movably arranged on the lifting frames and can move on the lifting frames along the longitudinal direction of the lifting frames.

2. The steel-concrete composite beam lifting station according to claim 1, wherein each of the steel pipe piles is connected to the main girder by a distribution beam, each of the steel pipe piles includes a first frame body and a second frame body which are disposed opposite to each other, the main girder is movable in a height direction of the steel pipe pile between the first frame body and the second frame body, and the distribution beam has a first position where the distribution beam is not connected to the steel pipe pile and a second position where the distribution beam is connected to the steel pipe pile with respect to the main girder; and when the distribution beam moves to the preset installation position of the steel pipe pile along with the main truss, the distribution beam rotates relative to the truss section to be converted from the first position to the second position.

3. The steel-concrete composite beam lifting station according to claim 2, wherein each row of the main truss is formed by splicing a plurality of truss sections, each truss section is fixed between two adjacent steel pipe piles, and the distribution beam is arranged between each truss section and each steel pipe pile.

4. The reinforced concrete composite beam lift station of claim 2, wherein the spreader beam rests below the main truss, and in the first position, the spreader beam is suspended below the main truss by wire rope.

5. The steel and concrete composite beam lift station of claim 2, wherein the distributor beam is rotatable relative to the main truss to move from a first position to a second position.

6. The steel-concrete composite beam lift station of claim 1, further comprising a tie beam disposed across the two rows of the main trusses.

7. The assembling and disassembling method of the steel-concrete composite beam lifting station is characterized by comprising the following steps of:

s1: two rows of steel pipe pile rows are laid on two sides of a constructed bridge, each row of steel pipe pile rows comprises at least two steel pipe piles which are arranged in parallel, and each steel pipe pile is vertical to the ground where the constructed bridge is located;

s2: a lifting device is arranged on each steel pipe pile,

s3: assembling two rows of main trusses and a gantry lifting appliance: splicing two rows of main trusses between two rows of steel pipe pile rows, wherein each row of truss consists of a plurality of truss sections, installing a gantry hanger on the two rows of main trusses, wherein the gantry hanger comprises a hanger arranged between the two rows of main trusses and a movable hanger arranged on the hanger, the movable hanger can move on the hanger, and distribution beams are arranged on the main trusses;

s4: and synchronously lifting two rows of main trusses and a gantry lifting appliance by adopting a lifting device until the distribution beam moves to the preset mounting position of the steel pipe pile along with the main trusses, and moving the distribution beam to enable the distribution beam to be in butt joint with the corresponding steel pipe pile.

8. The method for attaching and detaching the steel-concrete composite girder lifting station according to claim 7, wherein the step S2 comprises in detail:

placing a distribution beam at a corresponding position on the ground where the steel pipe pile is located;

assembling a multi-section truss and a gantry lifting appliance into an integral structure at corresponding positions of the two rows of steel pipe pile rows;

hoisting each row of main trusses for a distance relative to the ground;

and the distribution beam is hung below the truss by using a steel wire rope.

9. The method for attaching and detaching the steel-concrete composite girder lifting station according to claim 7, wherein the step S3 comprises in detail:

synchronously lifting two rows of main trusses by adopting a lifting device until a distribution beam moves to a preset mounting position of the steel pipe pile along with the main trusses;

and rotating the distribution beam by 90 degrees relative to the main truss to enable the distribution beam to be in butt joint with the corresponding steel pipe pile.

10. The method for assembling and disassembling the steel-concrete composite beam lifting station according to claim 7, wherein the method for assembling and disassembling comprises the following steps:

arranging a temporary buttress on the bridge floor as a fulcrum for detaching the overhead crane beam after the overhead crane beam is lowered, moving the overhead crane beam to be right above the bridge floor buttress, lowering the gantry lifting appliance to be below the main truss of the girder station, and cutting off the middle part of the temporary buttress above the bridge floor in a parallel connection manner; forming temporary supporting points which are used as main trusses and are placed to the rear end part of the bridge deck at the positions between the pipe piles close to the outer side of the temporary buttress, and the positions are as high as the bridge deck;

the main truss and the gantry lifting appliance are put down to the bridge floor; filling a gap between the temporary bridge deck buttress and the gantry hanger with a steel plate;

removing the lifting device, and cutting the steel pipe pile to be as high as the bridge floor; the truck is hoisted to the bridge; dismantling a section of main truss on the bridge deck;

the truck crane drives into the space between the main trusses from the gap; dismantling the gantry crane; dismantling the crown block beam section by section; continuously dismantling the rest main truss on the bridge deck; and (5) dismantling the temporary buttress and the rest steel pipe piles.

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