CN111232835B - Steel-concrete composite beam lifting station and assembly and disassembly method thereof - Google Patents
Steel-concrete composite beam lifting station and assembly and disassembly method thereofInfo
- Publication number
- CN111232835B CN111232835B CN202010155609.1A CN202010155609A CN111232835B CN 111232835 B CN111232835 B CN 111232835B CN 202010155609 A CN202010155609 A CN 202010155609A CN 111232835 B CN111232835 B CN 111232835B
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- steel pipe
- lifting
- pipe pile
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C5/00—Base supporting structures with legs
- B66C5/02—Fixed or travelling bridges or gantries, i.e. elongated structures of inverted L or of inverted U shape or tripods
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C19/00—Cranes comprising trolleys or crabs running on fixed or movable bridges or gantries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C6/00—Girders, or track-supporting structures, specially adapted for cranes
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
- E01D19/125—Grating or flooring for bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
- E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Mechanical Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
本发明涉及一种钢混组合梁提升站，包括两排设置在被施工桥梁两侧的钢管桩排，每排所述钢管桩排包括至少两个平行设置的钢管桩，每个所述钢管桩垂直被施工桥梁所在的地面；若干提升装置，每个所述钢管桩上设置有一个提升装置；两排主桁架，每排主桁架被所述提升装置吊装至对应的一排所述钢管桩排上，所述主桁架位于被施工桥梁的桥面所在位置的上方；以及，龙门吊具，包括吊架和移动吊具，所述吊架横设在两排所述主桁架上，所述吊架的纵长方向垂直所述主桁架的纵长方向，所述移动吊具活动设置在所述吊架上，且可在所述吊架上沿所述吊架的纵长方向移动。
The present invention relates to a steel-concrete composite beam lifting station, comprising two rows of steel pipe piles arranged on both sides of a bridge to be constructed, each row of the steel pipe piles comprising at least two parallel steel pipe piles, each of the steel pipe piles being perpendicular to the ground where the bridge to be constructed is located; a plurality of lifting devices, with one lifting device being provided on each of the steel pipe piles; two rows of main trusses, each row of main trusses being hoisted by the lifting devices to a corresponding row of the steel pipe piles, the main trusses being located above the bridge deck of the bridge to be constructed; and a gantry hoist, comprising a hanger and a mobile hanger, the hanger being horizontally arranged on the two rows of main trusses, the longitudinal direction of the hanger being perpendicular to the longitudinal direction of the main trusses, the mobile hanger being movably arranged on the hanger and being movable on the hanger along the longitudinal direction of the hanger.
Description
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 is generally composed of a steel beam stage and a bridge deck plate, wherein a conventional steel beam adopts a hollow groove-shaped beam, the bridge deck plate is a solid concrete plate, the weight of the steel beam can reach 1.9 ten thousand t, the weight of the bridge deck plate can reach 100t, and the bridge deck is large in construction span, so that the conventional crane is generally difficult to implement.
Disclosure of Invention
The invention aims to provide a steel-concrete composite beam lifting station which is simple in structure and convenient to implement.
In order to achieve the aim, the invention provides the following technical scheme that the steel-concrete composite beam lifting station comprises
Two steel pipe pile rows arranged on two sides of a bridge to be constructed, wherein each steel pipe pile row comprises at least two steel pipe piles arranged in parallel, and each steel pipe pile is vertical to the ground where the bridge to be constructed is located;
a plurality of lifting devices, wherein each steel pipe pile is provided with one lifting device;
two rows of main trusses, each row of main trusses is hoisted to a corresponding row of steel pipe pile rows by the hoisting device, the main trusses are positioned above the position of the bridge deck of the constructed bridge, and
The gantry lifting device comprises lifting frames and movable lifting devices, wherein the lifting frames are transversely arranged on two rows of main trusses, the longitudinal directions of the lifting frames are perpendicular to the longitudinal directions of the main trusses, and the movable lifting devices are movably arranged on the lifting frames and can move on the lifting frames along the longitudinal directions of the lifting frames.
Further, 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 oppositely arranged, the main truss can move between the first frame body and the second frame body along the height direction of the steel pipe pile, the distribution beam has a first position for enabling the distribution beam not to be connected with the steel pipe pile and a second position for enabling the distribution beam to be connected with the steel pipe pile relative to the main truss, and when the distribution beam moves to a preset installation position of the steel pipe pile along with the main truss, the distribution beam rotates relative to the truss section to be changed from the first position to the second position.
Further, each row of main trusses 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 a distribution beam is arranged between each section of truss section and each steel pipe pile.
Further, the distribution beam abuts against the lower portion 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 may be rotatable relative to the main truss to move from a first position to a second position.
Further, 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 a method for assembling and disassembling the steel-concrete composite beam lifting station, which comprises the following steps:
S1, paving two rows of steel pipe pile rows on two sides of a bridge to be constructed, wherein 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 bridge to be constructed is located;
S2, installing a lifting device on each steel pipe pile,
S3, splicing two rows of main trusses and a gantry lifting tool, wherein the two rows of main trusses are spliced between the two rows of steel pipe pile rows, each row of trusses consists of a plurality of truss sections, the gantry lifting tool is arranged on the two rows of main trusses and comprises a lifting frame arranged between the two rows of main trusses and a movable lifting tool arranged on the lifting frame, the movable lifting tool can move on the lifting frame, and a distribution beam is arranged on the main truss;
and S4, synchronously lifting the two rows of main trusses and the gantry lifting appliance by adopting a lifting device until the distribution beam moves to a preset installation 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:
Placing a distribution beam at a corresponding position of the ground where the steel pipe pile is located;
assembling the multi-section truss and the gantry lifting appliance at the corresponding positions of the two rows of steel pipe pile rows into an integrated structure;
Lifting each row of main trusses a distance relative to the ground;
the distribution beam is suspended below the truss by a wire rope.
Further, the step S3 includes:
synchronously lifting the two rows of main trusses by adopting a lifting device until the distribution beams move to a preset installation position of the steel pipe piles along with the main trusses;
and rotating the distribution beam by 90 degrees relative to the main truss, so that the distribution beam is in butt joint with the corresponding steel pipe pile.
Further, the disassembly and assembly method comprises the following steps:
setting a temporary buttress on the bridge deck, taking the temporary buttress as a pivot for dismantling the overhead travelling crane beam after the temporary buttress is lowered, moving the overhead travelling crane beam to the position right above the bridge deck buttress, lowering a gantry lifting appliance to the position below a main truss of a girder lifting station, and cutting off the middle part of the temporary buttress above the bridge deck in parallel connection;
lowering the main truss and the gantry lifting tool to the bridge deck, and filling the gap between the temporary bridge deck buttress and the gantry lifting tool with a steel plate plug;
Removing the lifting device, cutting the steel pipe pile to the same height as the bridge deck, lifting the bridge by the automobile crane, and removing a section of main truss on the bridge deck;
The method comprises the steps of enabling an automobile crane to enter between main trusses from a notch, removing a gantry lifting appliance, removing overhead beams section by section, continuously removing the rest main trusses on a bridge deck, and removing temporary buttresses and the rest steel pipe piles.
The steel-concrete composite beam lifting station has the beneficial effects that the steel-concrete composite beam lifting station is simple in structure, can be directly built and disassembled on the building implementation ground, can improve the working efficiency, and is particularly suitable for construction of large bridges (such as an overhead bridge). Moreover, the steel-concrete composite beam lifting station has low geological requirements and wide adaptability.
The foregoing description is only an overview of the present invention, and is intended to provide a better understanding of the present invention, as it is embodied in the following description, 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-concrete composite girder lifting station shown in FIG. 1;
FIG. 3 is a top view of the steel-concrete composite girder lifting station shown in FIG. 1;
fig. 4 is a schematic view of a state of the main truss, after the gantry crane is assembled, lifted by a lifting device;
Fig. 5 is a schematic view showing a state when the main truss and the gantry crane pass through the lower part of the lifting device to the bridge deck.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
Referring to fig. 1 to 3in combination with fig. 4, a steel-concrete composite girder lifting station according to a preferred embodiment of the present invention includes two rows of steel pipe pile rows 10, a plurality of lifting devices 50 (shown in fig. 4), two rows of main trusses 20, and a gantry hanger 30. Two steel pipe pile rows 10 are arranged on two sides of a bridge to be constructed, each steel pipe pile row 10 comprises at least two steel pipe piles 11 which are arranged in parallel, and each steel pipe pile 11 is perpendicular to the ground where the bridge to be constructed is located. A lifting device 50 is provided on each of the steel pipe piles 11. Each row of 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 positioned above the position where the deck (not shown) of the bridge to be constructed is positioned. The gantry lifting device 30 comprises a lifting frame 31 and a movable lifting device 32, wherein the lifting frame 31 is transversely arranged on two rows of main trusses 20, the longitudinal direction of the lifting frame 31 is perpendicular to the longitudinal direction of the main trusses 20, the movable lifting device 32 is movably arranged on the lifting frame 31 and can move on the lifting frame 31 along the longitudinal direction of the lifting frame 31, the lifting frame 31 and the movable lifting device 32 are connected in a mode that a sliding rail 33 is arranged on the lifting frame 31, a movable seat 34 matched with the sliding rail 33 is arranged on the movable lifting device 32, and the movable seat 34 is driven by a driving device 35 to move on the sliding rail along the longitudinal direction of the lifting frame 31.
In this embodiment, in order to strengthen the overall reinforced concrete composite girder lifting station, the reinforced concrete composite girder lifting station further includes connection girders 40 transversely provided on the two rows of the main girders 20. In this embodiment, the lifting device 50 is a jack, and of course, 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 shown) and each of the steel pipe piles 11 includes a first frame body 12 and a second frame body 13 disposed opposite to each other, the main truss 20 is movable between the first frame body 12 and the second frame body 13 in a height direction of the steel pipe piles 11, the distribution beam has a first position (not shown) in which the distribution beam is not connected to the steel pipe piles 11 and a second position (not shown) in which the distribution beam is connected to the steel pipe piles 11 with respect to the main truss 20, and the jack 50 is disposed at a top of the steel pipe piles 11 in a conventional arrangement, and the distribution beam is rotated with respect to the truss section to be shifted from the first position to the second position when the distribution beam is moved with the main truss 20 to a preset installation position (indicated by an arrow a in fig. 4) of the steel pipe piles 11. Specifically, each row of main trusses 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 distribution beam may be disposed above or on the side of the main truss 20, but in actual use, the distribution beam may be disposed below the main truss 20 so that the force of the main truss 20 is directly received by the distribution beam, and the distribution beam may be disposed below the main truss 20, without considering the force problem, and the distribution beam and the main truss 20 may be connected by simple fasteners or wire ropes, or may not be connected, but when the distribution beam is in the second position, the distribution beam may be connected to the steel pipe pile 11, the main truss 20 may be connected to the steel pipe pile 11, and the distribution beam, the main truss 20, and the steel pipe pile may be connected in a manner that restricts the movement of the main truss 20 relative to the steel pipe pile in the longitudinal direction of the main truss 20, regardless of whether the distribution beam is directly connected to the main truss 20 or the distribution beam is connected to the steel pipe pile.
In the first position, the distribution beam is suspended below the main truss 20 by a wire rope (not shown), but in other embodiments, the distribution beam may be connected below the main truss 20 by other structures. In addition, in this embodiment, the distribution beam is rotatable relative to the main truss 20 to move from a first position to a second position. While in other embodiments the distribution beams may be a pull-out connection or the like with the main truss 20. In actual operation, the main truss 20 and the gantry crane 30 are usually assembled into an integral structure, then lifted to a designated position (indicated by an arrow a in fig. 4) of the steel pipe pile 11 by the jack 50, and finally the jack 50 and the steel pipe pile 11 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 lifting tool 30 are selected according to actual requirements, wherein the steel pipe pile 11 can be of two different types and is divided into a main bearing structure and an auxiliary structure, and the bearing performance of the material 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 rod and the web member are made of Q235 steel. The whole main truss girder is of a space truss structure. To ensure the overall stability of the lifting station, useAnd connecting and fixing two adjacent truss sections by using the steel pipes.
The assembly and disassembly method of the steel-concrete composite beam lifting station comprises an assembly method and a disassembly method.
Referring to fig. 1 to 4, the mounting method includes:
S1, paving two rows of steel pipe pile rows 10 on two sides of a bridge to be constructed, wherein each row of steel pipe pile rows 10 comprises at least two steel pipe piles 11 which are arranged in parallel, and each steel pipe pile 11 is perpendicular to the ground where the bridge to be constructed is located;
S2, installing a lifting device 50 on each steel pipe pile 11;
S3, splicing two rows of main trusses 20 and a gantry lifting tool 30, wherein the two rows of main trusses 20 are spliced between the two rows of steel pipe pile rows 10, each row of trusses consists of a plurality of truss sections, the gantry lifting tool 30 is arranged on the two rows of main trusses 20, the gantry lifting tool 30 comprises a lifting frame 31 arranged between the two rows of main trusses 20 and a movable lifting tool 32 arranged on the lifting frame 31, the movable lifting tool 32 can move on the lifting frame 31, and a distribution beam is arranged on the main trusses 20;
And S4, synchronously lifting the two rows of main trusses 20 and the gantry lifting tool 30 by adopting a lifting device 50 until the distribution beam moves to a 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:
Setting a temporary buttress 70 on the bridge deck 60, taking the temporary buttress 70 as a pivot for dismantling the overhead travelling crane beam after lowering, running the overhead travelling crane beam to the position right above the bridge deck 60 buttress, lowering the gantry lifting appliance 30 below the main truss 20 of the girder lifting station, and cutting off the middle part of the temporary buttress 70 above the bridge deck 60 in parallel;
Lowering the main truss 20 and the gantry crane 30 to the bridge deck 60, and filling the gap between the temporary buttress 70 of the bridge deck 60 and the gantry crane 30 with a steel plate plug;
Removing the lifting device 50, cutting the steel pipe pile 11 to the same height as the bridge deck 60, lifting the bridge by an automobile crane, and removing a section of main truss 20 on the bridge deck 60;
The truck crane is driven into the space between the main trusses 20 from the gap, the gantry crane 30 is dismounted, the overhead crane beams are dismounted section by section, the rest of the main trusses 20 on the bridge deck 60 are dismounted continuously, and the temporary buttresses 70 and the rest of the steel pipe piles 11 are dismounted.
In this embodiment, the step S2 includes:
placing a distribution beam at a corresponding position of the ground where the steel pipe pile 11 is positioned;
assembling the multi-section truss and the gantry lifting tool 30 into an integrated structure at the corresponding positions of the two rows of steel pipe pile rows 10;
lifting each row of main trusses 20 a distance from the ground;
the distribution beam is suspended below the truss by a wire rope.
In this embodiment, the step S3 includes:
Synchronously lifting the two rows of main trusses 20 by adopting a lifting device 50 until the distribution beams move to a preset installation position of the steel pipe piles along with the main trusses 20;
the distribution beam is rotated 90 degrees relative to the main truss 20 so that the distribution beam is butted with the corresponding steel pipe pile 11.
In summary, the steel-concrete composite beam lifting station has a simple structure, can be directly constructed and disassembled on the ground of a building implementation, can improve the working efficiency, and is particularly suitable for construction of large bridges (such as an overhead bridge). Moreover, the steel-concrete composite beam lifting station has low geological requirements and wide adaptability.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (5)
1. The steel-concrete composite beam lifting station is characterized by comprising two rows of steel pipe pile rows arranged on two sides of a constructed bridge, wherein each steel pipe pile row comprises at least two steel pipe piles which are arranged in parallel, and each steel pipe pile is perpendicular to the ground on which the constructed bridge is positioned;
a plurality of lifting devices, wherein each steel pipe pile is provided with one lifting device;
two rows of main trusses, each row of main trusses is hoisted to a corresponding row of steel pipe pile rows by the hoisting device, the main trusses are positioned above the position of the bridge deck of the constructed bridge, and
The gantry lifting appliance comprises lifting frames and movable lifting appliances, the lifting frames are transversely arranged on two rows of main trusses, the longitudinal direction of each lifting frame is perpendicular to the longitudinal direction of each main truss, and the movable lifting appliances are movably arranged on the lifting frames and can move on the lifting frames along the longitudinal direction of each lifting frame;
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 oppositely arranged, the main truss can move between the first frame body and the second frame body along the height direction of the steel pipe pile, the distribution beam has a first position for enabling the distribution beam not to be connected with the steel pipe pile and a second position for enabling the distribution beam to be connected with the steel pipe pile relative to the main truss, and when the distribution beam moves to a preset installation position of the steel pipe pile along with the main truss, the distribution beam rotates relative to truss sections to be converted from the first position to the second position;
the distribution beam is propped against the lower part of the main truss, and is hung below the main truss through a steel wire rope when in a first position;
the distribution beam is rotatable relative to the main truss to move from a first position to a second position.
2. The steel and concrete composite beam lifting station of claim 1, wherein each row of the main trusses 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.
3. The steel and concrete composite girder lifting station of claim 1, further comprising a connecting girder transversely disposed on two rows of the main girders.
4. The method for assembling and disassembling the steel-concrete composite beam lifting station is characterized by comprising the following steps of:
S1, paving two rows of steel pipe pile rows on two sides of a bridge to be constructed, wherein 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 bridge to be constructed is located;
S2, installing a lifting device on each steel pipe pile,
S3, splicing two rows of main trusses and a gantry lifting tool, wherein the two rows of main trusses are spliced between the two rows of steel pipe pile rows, each row of trusses consists of a plurality of truss sections, the gantry lifting tool is arranged on the two rows of main trusses and comprises a lifting frame arranged between the two rows of main trusses and a movable lifting tool arranged on the lifting frame, the movable lifting tool can move on the lifting frame, and a distribution beam is arranged on the main truss;
S4, synchronously lifting the two rows of main trusses and the gantry lifting appliance by adopting a lifting device until the distribution beam moves to a preset installation 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;
The step S2 includes:
Placing a distribution beam at a corresponding position of the ground where the steel pipe pile is located;
assembling the multi-section truss and the gantry lifting appliance at the corresponding positions of the two rows of steel pipe pile rows into an integrated structure;
Lifting each row of main trusses a distance relative to the ground;
hanging the distribution beam below the truss by using a steel wire rope;
The step S3 includes:
synchronously lifting the two rows of main trusses by adopting a lifting device until the distribution beams move to a preset installation position of the steel pipe piles along with the main trusses;
and rotating the distribution beam by 90 degrees relative to the main truss, so that the distribution beam is in butt joint with the corresponding steel pipe pile.
5. The method for assembling and disassembling the steel-concrete composite girder lifting station according to claim 4, wherein the assembling and disassembling method comprises the steps of:
Setting a temporary buttress on the bridge deck, taking the temporary buttress as a pivot for dismantling the overhead travelling crane beam after lowering, running the overhead travelling crane beam to the position right above the bridge deck buttress, lowering the gantry lifting appliance to the position below the main truss of the girder lifting station, and cutting off the middle part of the temporary buttress above the bridge deck in parallel;
Forming a temporary supporting point which is used as a main truss to be lowered to the rear end part of the bridge deck at the same height as the bridge deck between the tubular piles on the outer side of the temporary buttress;
lowering the main truss and the gantry lifting tool to the bridge deck, and filling the gap between the temporary bridge deck buttress and the gantry lifting tool with a steel plate plug;
Removing the lifting device, cutting the steel pipe pile to the same height as the bridge deck, lifting the bridge by the automobile crane, and removing a section of main truss on the bridge deck;
The method comprises the steps of enabling an automobile crane to enter between main trusses from a notch, removing a gantry lifting appliance, removing overhead beams section by section, continuously removing the rest main trusses on a bridge deck, and removing temporary buttresses and the rest steel pipe piles.
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| CN211712455U (en) * | 2020-03-09 | 2020-10-20 | 中交一公局第二工程有限公司 | Steel-concrete composite beam lifting station |
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