CN102127899B - System for lifting and sliding large-tonnage steel box girder in land area and shoal area and construction method thereof - Google Patents
System for lifting and sliding large-tonnage steel box girder in land area and shoal area and construction method thereof Download PDFInfo
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- CN102127899B CN102127899B CN2011100280738A CN201110028073A CN102127899B CN 102127899 B CN102127899 B CN 102127899B CN 2011100280738 A CN2011100280738 A CN 2011100280738A CN 201110028073 A CN201110028073 A CN 201110028073A CN 102127899 B CN102127899 B CN 102127899B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 92
- 239000010959 steel Substances 0.000 title claims abstract description 92
- 238000010276 construction Methods 0.000 title claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- -1 polytetrafluoroethylene Polymers 0.000 claims description 4
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 4
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 4
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 230000001174 ascending effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The invention relates to the technical field of bridge construction, and discloses a system for lifting and sliding a large-tonnage steel box girder in a land area and a shoal area and a construction method thereof. The method comprises the following steps of: 1, arranging a lifting system beside a pier adjacent to a waterway, and arranging a sliding system below the lifting system and on a land side; 2, conveying a steel box girder section to a lifting position from the waterway, and lifting the steel box girder section by using a lifting device; 3, drawing a lifting transverse beam by using a jack and a steel stranded wire which are arranged on a lifting longitudinal beam to ensure that the lifting transverse beam, together with the lifting device and the steel box girder section, slides to a position above a sliding platform along the lifting longitudinal beam; 4, descending the steel box girder section to the sliding platform by using the lifting device; and 5, sliding the steel box girder section to a design position along a sliding track by using drawing equipment and arranging in position. The problem that a large floating crane is limited by the water level of a river channel and influenced by tide is solved, the construction period of a single steel box girder section is shortened, and work efficiency is improved; meanwhile, the steel box girder section can be arranged in the shoal area and the land area.
Description
Technical Field
The invention relates to the technical field of bridge construction, in particular to a lifting and sliding system of a large-tonnage steel box girder in a land area and a shoal area and a construction method thereof. The lifting device is suitable for lifting and longitudinally moving a large-scale lifting station arranged at a bridge site to a designed position by utilizing the large-scale lifting station when a large-tonnage steel box girder is prefabricated by a factory and transported to the bridge site through a water path, and the steel box girder is arranged in place, so that the integral lifting of steel box girder sections is realized.
Background
In the existing bridge construction, large-tonnage steel box girders are generally processed and manufactured in factories and transported to a construction site through a waterway, and a large-scale floating crane is used for hoisting and mounting.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: a lifting system and a construction method of a large-tonnage steel box girder in a land area and a shoal area are provided to overcome the defect that the practical range of the prior art is limited.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a lifting system of a large-tonnage steel box girder in land areas and shoal areas comprises two parts: hoisting system and system that slides:
the hoisting system comprises: the lifting system is arranged beside a pier of the navigation channel; running gear, including: the device comprises a slideway, a jack, a steel strand, a polytetrafluoroethylene sliding plate and a walking base; a lifting longitudinal beam is placed on the top surface of the lifting support, a lifting cross beam is installed on the lifting longitudinal beam, a walking base is installed on the bottom surface of the lifting cross beam, a jack is arranged on the lifting longitudinal beam, a steel strand penetrates through the jack, the steel strand is anchored on the walking base and used for dragging the lifting cross beam and the steel box girder segment to walk, a slide way is arranged between the walking base and the lifting longitudinal beam, and a polytetrafluoroethylene sliding plate is placed between the two moving surfaces during walking in order to reduce the frictional resistance during the movement between the slide way and the walking base;
the sliding system comprises a sliding support, a sliding track and traction equipment, the traction equipment is arranged on the side close to the design position of the steel box girder, and the traction equipment is used for dragging and sliding the steel box girder segment to the design position to be installed in place; the sliding system is arranged below and behind the hoisting system and close to the land side, and is used for supporting, transposing and moving the steel box girder segments.
The lifting support is composed of a left triangular inclined supporting leg and a right triangular inclined supporting leg, the supporting legs are supported on the top surface of the bearing platform through steel pipe piles and are connected with a connecting piece embedded in the pier body in a welding mode, and therefore the requirement for stability of the support is met.
The lifting beam adopts a double-layer multi-row Bailey beam set.
The lifting device adopts two continuous lifting jack systems, steel strands are anchored through an anchorage device, a computer is used for centrally controlling a hydraulic system, a lifting jack piston is driven to extend and contract, the steel strands and a member are driven to ascend and descend, and integral synchronous lifting and descending of a large member are realized.
The sliding support is at least two rows of steel pipe piles arranged according to the design span, the sliding support is positioned near the pier, and the top of the pipe pile is connected with the tower body embedded part by using a pipe pile connection system, so that the stability of the sliding support is enhanced. The sliding track adopts steel or channel steel, and a Bailey beam group consisting of at least three Bailey beams is a supporting structure of the sliding track.
The traction equipment adopts two winches.
The invention also provides a construction method of the large-tonnage steel box girder in the land area and the shoal area, which comprises the following steps:
firstly, installing a hoisting system beside a pier position of an adjacent channel, and arranging a sliding system below the hoisting system and on a land side, wherein the hoisting system comprises a lifting support, a lifting longitudinal beam, a lifting cross beam, a hoisting device and a traveling device, and the sliding system comprises a sliding support, a sliding track and traction equipment;
transporting the steel box girder segments to a lifting position through a water path, and lifting the steel box girder segments by using a lifting device and enabling the steel box girder segments to be higher than the top surface of a sliding platform of the sliding system;
thirdly, starting the traveling device, and dragging the traveling base by using a jack and a steel strand arranged on the lifting longitudinal beam to enable the lifting cross beam, the lifting device and the steel box girder segment to move to the position above the sliding platform along the slide way and then stop;
fourthly, the steel box girder segment is dropped onto the sliding platform by the hoisting device;
and fifthly, sliding the steel box girder segment to a designed position along a sliding track on the sliding platform by utilizing a traction device arranged on the sliding platform, and installing the steel box girder segment in place.
The invention has the advantages that: the invention has low requirement on the water level of the channel, the beam-transporting ship can return to the sea after the steel box girder segment is lifted, and the steel box girder segment can be slid to the shoal land far away from the channel by the winch traction equipment, thereby solving the problems that the large-scale floating crane is limited by the water level of the river and affected by tide, shortening the construction period of the single-section steel box girder, improving the work efficiency, and simultaneously realizing the lifting installation of the steel box girder segment at the shoal and the land.
Drawings
FIG. 1 is a schematic diagram of the overall arrangement of a steel box girder segment hoisting system and a sliding platform.
FIG. 2 is a schematic diagram of a steel box girder segment hoisting system and a side elevation arrangement of a sliding platform.
Description of the components: 1 steel box girder segment section, 2 promote the support, 3 promote the longeron, 4 promote the crossbeam, 5 hoisting accessory, 6 promote the hoist, 7 jacks, 8 slides, 9 support that slides, 10 tracks that slide, 11 traction equipment, 12 steel strand wires, 13 walk the capable base.
Detailed Description
The present invention is further described with reference to the following drawings and specific examples so that those skilled in the art can better understand the present invention and can practice the present invention, but the examples are not intended to limit the present invention.
As shown in fig. 1 and 2, the invention relates to a lifting system of a large-tonnage steel box girder in land areas and shoals, which comprises two parts: a hoisting system and a sliding platform of the steel box girder segment;
hoist and mount system includes: the lifting device comprises a lifting support 2, a lifting longitudinal beam 3, a lifting cross beam 4, a lifting device 5 and a walking device; the hoisting system is arranged beside a pier of the navigation channel, and excavates a riverbed at the position of the lifting support to meet the requirement of transportation and parking of the steel box girder segment. Running gear, including: the device comprises a walking base 13, a slideway 8, a jack 7, a steel strand 12 and a tetrafluoro sliding plate, wherein a walking device is arranged on a lifting longitudinal beam 5 and connected with a lifting cross beam 4; a hoisting device 5 is mounted above the lifting beam 4.
The sliding platform comprises a sliding support 9, a sliding track 10 and a traction device 11, wherein the traction device 11 is arranged on the side close to the design position of the steel box girder, and the traction device 11 is used for dragging and sliding the steel box girder segment to the design position to be installed in place.
Referring to fig. 1 and 2, the construction method of the large-tonnage steel box girder in the land area and the shoal area comprises the following specific steps: when a bridge bearing platform and a tower column close to a river channel lifting position are constructed, embedded parts of a lifting support and a sliding platform are embedded, the lifting support 2 is assembled beside a pier, a lifting longitudinal beam 3 is arranged on the lifting support 2, a lifting jack 7 of a traveling device, a steel strand 12, a slideway 8 and other parts and a lifting cross beam 4 are arranged on the lifting longitudinal beam 3, the slideway is in contact with a traveling base 13 at the bottom of the lifting cross beam 4, a polytetrafluoroethylene sliding plate is placed between two contact surfaces during traveling, and the steel strand 12 and the lifting cross beam 4 are connected and anchored; the hoisting device 5 is arranged on the hoisting cross beam 4, two hoisting devices are arranged, two-point hoisting is adopted, namely two continuous hoisting jack systems are adopted, the steel strand is anchored through an anchorage device, a hydraulic system is controlled in a centralized manner by a computer, a piston of the hoisting jack is driven to extend and retract, the steel strand and the member are driven to ascend and descend, and integral synchronous hoisting and descending of the large member are realized. Meanwhile, a sliding support 9 is assembled below the lifting system and on the side close to the land area, a sliding track 10 is laid on the sliding support 9, and a traction device 11 is installed on the side of the side pier of the steel box girder. During construction, when the steel box girder segment 1 is conveyed to the lower part of a lifting system through a water path, the lifting sling 6 and the lifting device 5 synchronously operate to lift the steel box girder segment 1 to the position where the bottom surface of the steel box girder is higher than the top surface of a sliding platform and then stop, two jacks 7 arranged on the lifting longitudinal beam 3 are started, the lifting beam 4 is pulled through a steel strand 12, so that the lifting beam 4, the lifting device 5 and the steel box girder segment 1 are together moved to the position above the sliding platform along a slide rail 8, the steel box girder segment 1 is placed onto the sliding platform, a traction device 11 arranged on the sliding platform is adopted, and the steel box girder segment 1 is pulled to be moved to a designed position along a sliding rail 10 to be installed in place.
The above-mentioned embodiments are merely preferred embodiments for fully illustrating the present invention, and the scope of the present invention is not limited thereto. The equivalent substitution or change made by the technical personnel in the technical field on the basis of the invention is all within the protection scope of the invention.
Claims (6)
1. A lifting and sliding system of a large-tonnage steel box girder in land areas and shoal areas is characterized by comprising a hoisting system and a sliding system; wherein,
the hoisting system comprises a hoisting support, a hoisting longitudinal beam, a hoisting cross beam, a hoisting device and a traveling device, and is arranged beside a pier of the navigation channel; the lifting support consists of a left triangular inclined supporting leg and a right triangular inclined supporting leg, the supporting legs are supported on a pier bearing platform and are welded and connected with a connecting piece embedded in advance on a pier body, a group of lifting longitudinal beams are arranged on the top of each supporting leg along the bridge span direction, the length of each lifting longitudinal beam meets the requirement that a steel box girder segment travels to the position above a sliding platform of a sliding system, a set of traveling device is arranged on each group of lifting longitudinal beams, and each traveling device comprises a slideway, a jack, a steel strand, a tetrafluoro sliding plate and a traveling base; the lifting cross beam is arranged on a walking base on the lifting longitudinal beam and is temporarily locked, a jack is arranged on the lifting longitudinal beam, a steel strand penetrates through the jack, the steel strand is anchored on the walking base and is used for dragging the lifting cross beam and a steel box girder segment to walk, a slideway is arranged between the walking base and the lifting longitudinal beam, the slideway adopts a steel rail, and a polytetrafluoroethylene sliding plate is arranged between two moving surfaces during walking in order to reduce the friction resistance during moving;
the sliding system comprises a sliding support, a sliding track and traction equipment, is arranged at the lower rear part of the hoisting system, is arranged along the whole length of the side span of a land area, and is used for supporting, transposing and moving the steel box girder segment; the sliding support is a bearing structure of the whole sliding system and is arranged along the axle line of the bridge according to the designed span, and the sliding track is fixed on the support; the traction equipment is arranged on the side of the side pier at the design position of the steel box girder, and the traction equipment pulls the steel box girder segment to slide to the design position along the sliding track to be installed in place.
2. The system of claim 1, wherein the lifting beam is a double-layer multi-row beret beam set.
3. The lifting and sliding system of the large-tonnage steel box girder in the land area and the shoal area as claimed in claim 1, wherein the sliding support is at least two rows of steel pipe piles arranged according to a designed span, the sliding track adopts steel or channel steel, and a Bailey beam group consisting of at least three Bailey beams is a supporting structure of the sliding track.
4. The system of claim 1, wherein the traction device comprises two winches.
5. The system of claim 1, wherein the hoisting device comprises two continuous hoisting jack systems, the steel strand is anchored by anchors, the hydraulic system is centrally controlled by a computer, the piston of the hoisting jack is driven to extend and retract, the steel strand and the member are driven to ascend and descend, and the integral synchronous ascending and descending of the large member are realized.
6. A construction method of large-tonnage steel box girders in land areas and shoals by using the hoisting slip system according to any one of claims 1 to 5, characterized by comprising the following steps:
firstly, installing a hoisting system beside a pier position of an adjacent channel, and arranging a sliding system below the hoisting system and on a land side, wherein the hoisting system comprises a lifting support, a lifting longitudinal beam, a lifting cross beam, a hoisting device and a traveling device, and the sliding system comprises a sliding support, a sliding track and traction equipment;
transporting the steel box girder segments to a lifting position through a water path, and lifting the steel box girder segments by using a lifting device and enabling the steel box girder segments to be higher than the top surface of a sliding platform of the sliding system;
thirdly, starting the traveling device, and dragging the lifting beam by using a jack and a steel strand arranged on the lifting longitudinal beam to enable the lifting beam to slide to the upper part of the sliding platform along the lifting longitudinal beam together with the lifting device and the steel box girder segment, and then stopping moving;
fourthly, the steel box girder segment is dropped onto the sliding platform by the hoisting device;
and fifthly, sliding the steel box girder segment to a designed position along a sliding track on the sliding platform by utilizing a traction device arranged on the sliding platform, and installing the steel box girder segment in place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100280738A CN102127899B (en) | 2010-12-30 | 2011-01-26 | System for lifting and sliding large-tonnage steel box girder in land area and shoal area and construction method thereof |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010624514 | 2010-12-30 | ||
| CN201010624514.6 | 2010-12-30 | ||
| CN2011100280738A CN102127899B (en) | 2010-12-30 | 2011-01-26 | System for lifting and sliding large-tonnage steel box girder in land area and shoal area and construction method thereof |
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| Publication Number | Publication Date |
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| CN102127899A CN102127899A (en) | 2011-07-20 |
| CN102127899B true CN102127899B (en) | 2012-07-04 |
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| CN2011100280738A Active CN102127899B (en) | 2010-12-30 | 2011-01-26 | System for lifting and sliding large-tonnage steel box girder in land area and shoal area and construction method thereof |
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