CN114960481A - Large-span Bailey beam portal unloading and dismantling construction method - Google Patents
Large-span Bailey beam portal unloading and dismantling construction method Download PDFInfo
- Publication number
- CN114960481A CN114960481A CN202210677425.0A CN202210677425A CN114960481A CN 114960481 A CN114960481 A CN 114960481A CN 202210677425 A CN202210677425 A CN 202210677425A CN 114960481 A CN114960481 A CN 114960481A
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- China
- Prior art keywords
- bailey
- bailey beam
- universal fixed
- fixed pulley
- unloading
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- 238000010276 construction Methods 0.000 title claims abstract description 13
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 19
- 239000010959 steel Substances 0.000 claims abstract description 19
- 238000000034 method Methods 0.000 claims abstract description 10
- 230000001133 acceleration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/56—Reuse, recycling or recovery technologies of vehicles
Abstract
The invention discloses a construction method for dismounting and dismantling a large-span Bailey beam portal, which comprises the following steps: s1, erecting a truss platform on one side of the Bailey beam to be dismantled, and connecting the truss platform and the Bailey beam by I-shaped steel; s2, fixing a winch above the truss platform, installing a universal fixed pulley near a Bailey sheet to be unloaded of the Bailey beam, fixing one end of the universal fixed pulley with the winch through a steel wire rope, and fixing the other end of the universal fixed pulley with the Bailey sheet to be disassembled through the steel wire rope; s3, removing the transverse connection between the Bailey beam pieces and the Bailey beam pieces, and removing Bailey constraint; s4, slowly unloading the removed Bailey sheets to the lower open space or a transport tool through a winch and a universal fixed pulley, manually disassembling the Bailey sheets, and sorting and warehousing; s5, moving the universal fixed pulley to the next position of the accessory of the Bailey sheet to be dismantled, and dismantling the Bailey sheet by repeating the method.
Description
Technical Field
The invention relates to the technical field of bottom engineering, in particular to a large-span Bailey beam portal unloading and dismantling construction method.
Background
With the acceleration of urbanization in China, infrastructure is more and more perfect, bridge structures begin to develop rapidly and diversely, and bridges constructed by adopting combined supports of steel pipe piles, profile steel distribution beams and Bailey beams are frequently used in rivers and roads. Limited by river channels, road navigation and beam bottom space, the Bailey beam has large span, the hoisting and hoisting tool has no enough working space when being dismantled, and the effective working time is short.
However, the existing bailey beam dismantling construction method has some disadvantages, such as:
1. the bailey group is easy to deform in the dragging process by the integral dragging and hoisting method, the whole hoisting weight is heavy after dragging, the hoisting stability is poor, and the safety risk is high;
2. when the bailey beam is removed by a pontoon jacking method, the height of the pontoon is high, the synchronism of the spliced hull is difficult to guarantee, the position of the pontoon is difficult to fix, and the overall stability of the bailey beam is poor when the bailey beam is in place.
Disclosure of Invention
The invention aims to provide a construction method for unloading and dismantling a large-span Bailey beam portal, aiming at the defects of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a construction method for unloading and dismantling a large-span Bailey beam portal comprises the following steps:
s1, erecting a truss platform on one side of the Bailey beam to be dismantled, and connecting the truss platform and the Bailey beam by I-shaped steel;
s2, fixing a winch above the truss platform, installing a universal fixed pulley near a Bailey sheet to be unloaded of the Bailey beam, fixing one end of the universal fixed pulley with the winch through a steel wire rope, and fixing the other end of the universal fixed pulley with the Bailey sheet to be disassembled through the steel wire rope;
s3, removing the transverse connection between the Bailey beam pieces and the Bailey beam pieces, and removing Bailey constraint;
s4, slowly unloading the removed Bailey sheets to the lower open space or a transport tool through a winch and a universal fixed pulley, manually disassembling the Bailey sheets, and sorting and warehousing;
and S5, moving the universal fixed pulley to the next position of the accessory of the Bailey sheet to be removed, and repeating the method to remove the Bailey sheet.
Preferably, in step S1, one end of the i-beam is welded to the truss, and the other end of the i-beam is fixed to the bailey beam by using a U-shaped hoop.
Preferably, in step S2, the number of the universal fixed pulleys is two, the two universal fixed pulleys are respectively installed at positions 1/4 and 3/4 of beret, and the number of the winches is two.
Preferably, in steps S2 and S5, the universal fixed pulley is fixedly mounted on the undetached bery beam.
Compared with the prior art, the invention has the beneficial effects that: the problems that the large-span Bailey beam is heavy in weight and long in length, and the conventional dismantling method is poor in stability and easy to deform and occupies a channel and is long in road time except for the heavy Bailey beam are solved, and the dismantling method is simple, fast and convenient to achieve, and good in safety and stability.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic design of the present invention;
fig. 2 is a schematic view of the bailey piece removal design of the present invention.
In the figure: 1. truss platform, 2, I-steel, 3, hoist engine, 4, universal fixed pulley, 5, wire rope.
Detailed Description
The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the embodiments.
Referring to fig. 2 and fig. 2, a construction method for unloading and dismantling a large-span beret beam portal includes the following steps:
s1, erecting a truss platform 1 on one side of a Bailey beam to be dismantled, connecting the truss platform 1 and the Bailey beam by I-shaped steel 2, welding one end of the I-shaped steel 2 with a truss, and fixing one end of the I-shaped steel 2 with the Bailey beam by using a U-shaped hoop, so that the truss is prevented from deviating in the Bailey unloading process, and if the space for erecting the truss is still insufficient, the improvement can be that a triangular support is additionally arranged on a steel pipe pile to erect the truss platform 1, and the truss platform 1 is ensured to be stably erected;
s2, fixing two winches 3 above a truss platform 1, installing two groups of universal fixed pulleys 4 near a Bailey sheet to be unloaded of the Bailey beam, fixing one ends of the universal fixed pulleys 4 with the winches 3 through steel wire ropes 5, fixing the other ends of the universal fixed pulleys 4 with the Bailey sheet to be disassembled through the steel wire ropes 5, and installing the two groups of universal fixed pulleys 4 at 1/4 and 3/4 positions of the Bailey respectively to enable the distance between two stress positions of the Bailey sheet to be uniform relative to the length span of the Bailey sheet;
s3, removing the transverse connection between the Bailey beam pieces and the Bailey pieces, removing Bailey constraint, stopping falling under the traction of the steel wire rope 5 due to the free falling of the Bailey pieces under the action of gravity, connecting the Bailey pieces with the pulley hoist 3, and vertically unloading, wherein the Bailey pieces are good in stability and excellent in vertical unloading stress;
s4, slowly unloading the removed Bailey sheets to the lower air space or a transport tool through the winch 3 and the universal fixed pulley 4, manually disassembling the Bailey sheets, and sorting and warehousing;
and S5, moving the universal fixed pulley 4 to the next attachment of the Bailey sheet to be dismantled, fixing the universal fixed pulley 4 to the undetached Bailey beam, continuously moving the position along with the dismantling progress in the same manner as the step S1, and repeating the method to dismantle the Bailey sheet until the whole Bailey sheet group is dismantled.
The bailey is unloaded piece by piece through the winch 3 and the universal fixed pulley 4 system, so that the bailey beam is good in stability, high in safety, simple to operate and high in dismantling speed; in addition, the winch 3 fixed truss is only needed to be erected on one side of the Bailey beam, so that the extra workload is less, the requirement on the construction site environment is low, the channel is occupied, and the road time is short; finally, the invention has no connection with the existing bridge structure, does not apply any additional load on the bridge structure, and is not influenced by whether the bridge structure can bear force normally or not.
As above, while the invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limited thereto. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (4)
1. A construction method for unloading and dismantling a large-span Bailey beam portal is characterized by comprising the following steps:
s1, erecting a truss platform on one side of the Bailey beam to be dismantled, and connecting the truss platform and the Bailey beam by I-shaped steel;
s2, fixing a winch above the truss platform, installing a universal fixed pulley near a Bailey sheet to be unloaded of the Bailey beam, fixing one end of the universal fixed pulley with the winch through a steel wire rope, and fixing the other end of the universal fixed pulley with the Bailey sheet to be disassembled through the steel wire rope;
s3, removing the transverse connection between the Bailey beam pieces and the Bailey beam pieces, and removing Bailey constraint;
s4, slowly unloading the removed Bailey sheets to the lower open space or a transport tool through a winch and a universal fixed pulley, manually disassembling the Bailey sheets, and sorting and warehousing;
and S5, moving the universal fixed pulley to the next position of the accessory of the Bailey sheet to be removed, and repeating the method to remove the Bailey sheet.
2. The large-span Bailey beam portal unloading and dismantling construction method according to claim 1, characterized in that: in step S1, one end of the i-beam is welded to the truss, and the other end is fixed to the bailey beam by a U-shaped hoop.
3. The construction method for unloading and dismantling the large-span Bailey beam portal frame according to claim 2, characterized in that: in step S2, the number of the universal fixed pulleys is two, the two universal fixed pulleys are respectively installed at positions 1/4 and 3/4 of beret, and the number of the winches is two.
4. The large-span Bailey beam portal unloading and dismantling construction method according to claim 3, characterized in that: in steps S2 and S5, the universal fixed pulleys are fixedly installed on the undetached Bailey beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210677425.0A CN114960481A (en) | 2022-06-15 | 2022-06-15 | Large-span Bailey beam portal unloading and dismantling construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210677425.0A CN114960481A (en) | 2022-06-15 | 2022-06-15 | Large-span Bailey beam portal unloading and dismantling construction method |
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| Publication Number | Publication Date |
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| CN114960481A true CN114960481A (en) | 2022-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210677425.0A Pending CN114960481A (en) | 2022-06-15 | 2022-06-15 | Large-span Bailey beam portal unloading and dismantling construction method |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100039080A (en) * | 2008-10-07 | 2010-04-15 | 황하수 | Movement type apparatus for constructing and detaching frame panel of a steel box bridge |
| CN204454402U (en) * | 2014-11-10 | 2015-07-08 | 中国建筑第八工程局有限公司 | Detachable winch hanging apparatus |
| CN108374351A (en) * | 2018-05-17 | 2018-08-07 | 中交公局厦门工程有限公司 | A kind of simple hoisting apparatus and method for removing box beam beret slice |
| CN208293447U (en) * | 2018-05-29 | 2018-12-28 | 中建三局第二建设工程有限责任公司 | A kind of device of bent cap bracket overall pulling down |
| CN208441446U (en) * | 2018-04-26 | 2019-01-29 | 中建三局集团有限公司 | Indoor Bailey bracket removes device |
| CN210012524U (en) * | 2019-05-29 | 2020-02-04 | 南通四建集团有限公司 | Hoisting device for indoor hoisting of prefabricated combined pipeline |
| CN111188280A (en) * | 2020-02-21 | 2020-05-22 | 中国建筑第八工程局有限公司 | Cast-in-place box girder steel pipe support dismantling device and method |
| WO2021120687A1 (en) * | 2019-12-19 | 2021-06-24 | 中建科工集团有限公司 | Method for entire removal of space truss and assistive support mechanism |
-
2022
- 2022-06-15 CN CN202210677425.0A patent/CN114960481A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100039080A (en) * | 2008-10-07 | 2010-04-15 | 황하수 | Movement type apparatus for constructing and detaching frame panel of a steel box bridge |
| CN204454402U (en) * | 2014-11-10 | 2015-07-08 | 中国建筑第八工程局有限公司 | Detachable winch hanging apparatus |
| CN208441446U (en) * | 2018-04-26 | 2019-01-29 | 中建三局集团有限公司 | Indoor Bailey bracket removes device |
| CN108374351A (en) * | 2018-05-17 | 2018-08-07 | 中交公局厦门工程有限公司 | A kind of simple hoisting apparatus and method for removing box beam beret slice |
| CN208293447U (en) * | 2018-05-29 | 2018-12-28 | 中建三局第二建设工程有限责任公司 | A kind of device of bent cap bracket overall pulling down |
| CN210012524U (en) * | 2019-05-29 | 2020-02-04 | 南通四建集团有限公司 | Hoisting device for indoor hoisting of prefabricated combined pipeline |
| WO2021120687A1 (en) * | 2019-12-19 | 2021-06-24 | 中建科工集团有限公司 | Method for entire removal of space truss and assistive support mechanism |
| CN111188280A (en) * | 2020-02-21 | 2020-05-22 | 中国建筑第八工程局有限公司 | Cast-in-place box girder steel pipe support dismantling device and method |
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