CN114875806A - Method for jacking and disassembling bailey bracket under bridge - Google Patents
Method for jacking and disassembling bailey bracket under bridge Download PDFInfo
- Publication number
- CN114875806A CN114875806A CN202210678732.0A CN202210678732A CN114875806A CN 114875806 A CN114875806 A CN 114875806A CN 202210678732 A CN202210678732 A CN 202210678732A CN 114875806 A CN114875806 A CN 114875806A
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- bailey
- towing
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- steel box
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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
- E01D21/00—Methods or apparatus specially adapted for erecting or assembling bridges
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
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- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a method for jacking and disassembling a Belley bracket under a bridge, which comprises the following steps: s1, connecting the three suspended towing ships into a ship body through beam I-steel; s2, forming a group of 2 Bailey beams on a beam I-steel longitudinally assembled to the floating vessel, and vertically erecting a plurality of layers until the Bailey beams reach the disassembly height of the Bailey bracket of the steel box girder; s3, arranging a top cross beam on the upper portion of the Bailey beam, welding a jack above the top cross beam, and distributing beam frames on the upper portion of the jack; s4, injecting water into the waterproof cabin of the ship body; s5, starting the middle towing boat, driving the three towing boats to the bottom of the steel box girder bailey bracket, and slowly erecting the steel box girder bailey bracket; s7, starting a towing ship, and carrying the steel box girder bailey bracket to a position of a temporary shoreside assembly site in a floating mode; s8, hoisting the Bailey beam group to the shore by using a 500t floating crane, and disassembling and hoisting the Bailey beam group at an assembly site.
Description
Technical Field
The invention relates to the technical field of bridge bottom engineering, in particular to a method for jacking and disassembling a Belley bracket under a bridge.
Background
In the construction of steel box girders across rivers, steel pipe columns and Bailey girder supports are often adopted as a support system of the steel box girders, generally, 9-12 meters of steel pipe columns and single-layer Bailey girders are adopted for erection, but some rivers can not be off-sailed, and the navigation width and depth have special requirements, so that the steel pipe columns of the steel box girders can not be erected in the rivers, a span of the steel pipe columns passes through the width distance required by the navigation, similarly, Bailey girders also pass through the span, 2-3 layers of Bailey girders are often adopted, the span of the Bailey girders generally reaches about 30-50 meters, the weight of the Bailey girders is increased, the installation and the disassembly are extremely difficult, the Bailey girders are often assembled to corresponding positions in a grouping and slicing manner in the installation, each group is assembled after the Bailey girders are disassembled in a grouping and slicing manner, each group is assembled, but the Bailey girders are in the lower part of the installed steel box girders, so that the Bailey girders are not enough in the hoisting space, the hoisting device cannot be normally hoisted, so that a plurality of potential safety hazards are brought, the disassembly time is long due to the reason of the construction period, the control is not easy, and the construction period is very easy to delay.
Disclosure of Invention
The invention aims to provide a method for jacking and disassembling a Belley bracket under a bridge, aiming at the defects of the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for jacking and disassembling an underbridge bailey bracket comprises the following steps:
s1, connecting three suspended towing ships into a ship body through beam I-steel, and arranging ground anchors on the three towing ships respectively to anchor the three towing ships to the shore or the water bottom so as to keep the ship body stable;
s2, forming a group of 2 Bailey beams on a beam I-steel longitudinally assembled to the floating vessel, and vertically erecting a plurality of layers until the Bailey beams reach the disassembly height of the Bailey bracket of the steel box girder;
s3, arranging a top cross beam on the upper portion of the Bailey beam, connecting the top cross beam with the Bailey beam in a locking manner, welding a jack above the top cross beam, and distributing beam frames on the upper portion of the jack;
s4, injecting water into the waterproof bin of the ship body to enable the ship body to sink to meet the jacking height and jacking tonnage;
s5, starting the middle towing boat, driving the three towing boats to the bottom of the steel box girder bailey bracket, parking the three towing boats in parallel, and bolting the cable-carrying piles of the three towing boats by cables
S6, discharging water in the water-proof bin of the towing ship to enable the ship body to slowly float to the bottom of the steel box girder Bailey bracket, stopping water discharging when a distribution beam frame on a top jack contacts the bottom of the steel box girder Bailey bracket, starting the jack on the same side to slowly support the steel box girder Bailey bracket, fixing the distribution beam frame and the steel box girder Bailey bracket, and simultaneously tensioning cross beam I-beams at the joints of three towing ships by using a chain block and a steel wire rope;
s7, starting a towing ship, and carrying the steel box girder bailey bracket to a position of a temporary shoreside assembly site in a floating mode;
and S8, hoisting the Bailey beam group to the shore by using a 500t floating crane, and disassembling and hoisting the Bailey beam group at the assembly site.
Preferably, in step S1, the beam i-steel is provided with at least three oblong holes in the horizontal direction, and the towing boat and the beam i-steel are connected by bolts inserted into the oblong holes to complete the fixation of the three towing boats.
Preferably, in step S2, the beret beam is in a form of short lower part and wide upper part, the beret beam, the beam i-steel and the multi-layer beret beam are locked by using latches, and a guy cable is arranged on the short side of the beret beam to fix the beret beam to the ship body.
Preferably, in step S6, the distribution beam frame is fixedly connected to the steel box beam bailey bracket through a chain block and a stopper.
Compared with the prior art, the invention has the beneficial effects that:
1. the whole floating pontoon is jacked up, the dismounting speed is high, and the floating pontoon is safe and reliable;
2. the three ship bodies are arranged, the middle ship body is used for traction, the synchronization and the stability of the ship bodies can be effectively controlled, deviation is avoided, the ship bodies on two sides are used, the loaded area of the ship bodies can be increased, and the stability and the anti-overturning performance are strong;
3. the Bailey beam is adopted as the integral bracket, so that the integral stability of the bracket is increased, the strength and the rigidity of the Bailey beam bracket can be fully utilized, the stress of a lower ship body is uniform, and meanwhile, in order to further increase the anti-overturning and stability of the bracket in the driving and jacking processes, the mooring rope is arranged to be connected with the ship body, so that the Bailey beam is simple and convenient to install, strong in stability and capable of being recycled;
4. the system of the beam frame distribution and the top beam of the Bailey bracket can increase the jacking synchronism of the jack, ensure the uniform stress of the Bailey beam by utilizing the beam frame distribution, and simultaneously play a role in stamping the jack under the combined action of the beam frame distribution and the top beam so as to further increase the strength and reliability of the system; the jacking force of the jack and the buoyancy force of the ship body are balanced mutually, so that the buoyancy force is the same as the fixed buoyancy force, the steel box girder bailey bracket needing to be disassembled is slowly lifted, and the deformation and rigidity requirements of the steel box girder bailey bracket are effectively controlled.
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 design view of another aspect of the present invention;
fig. 3 is a structural schematic diagram of a beam I-steel.
In the figure: 1. the device comprises a towing ship, 2, a beam I-steel, 3, a long circular hole, 4, bolts, 5, a Bailey beam, 6, a steel box beam Bailey bracket, 7, a stay cable, 8, a top beam, 9, a jack, 10 and a distribution beam frame.
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. 1 to 3, a method for jacking and disassembling a bailey bracket under a bridge includes the following steps:
s1, connecting three suspended towing ships 1 into a ship body through beam I-steel 2, arranging at least three long round holes 3 on the beam I-steel 2 to be correspondingly connected with three floating ships through bolts 4, arranging the long round holes 3 mainly for adjusting the distance between the three towing ships 1, and being practical and capable of being used for ship body sizes with various spans respectively, wherein the bolts 4 adopt a configuration mode of four groups to play a role in fixing, avoid welding and ensure the integrity of the ship body, and the ship body is safe and reliable, the middle towing ship plays a role in jacking and towing, the towing ships on two sides play a role in jacking and stabilizing, the three towing ships 1 are respectively provided with ground anchors which are anchored to the shore or the bottom, and the stability of the ship body is kept;
s2, forming 2 Bailey beams 5 into a group on a beam I-steel 2 longitudinally assembled to the floating vessel, vertically erecting multiple layers until the disassembly height of the steel box beam Bailey bracket 6 is reached, adopting a mode that the Bailey beams 5 are short at the lower part and wide at the upper part to meet the requirement of reasonable span for disassembling the steel box beam Bailey bracket 6, and locking the Bailey beams 5 with the beam I-steel 2 and the multiple layers Bailey beams by adopting lock catches to avoid mutual movement and deformation of the Bailey beams; after the erection is finished, the stay ropes 7 are respectively arranged on the short sides of the Bailey beams 5 and fixed with the ship body, so that the Bailey beams 5 are prevented from overturning, and the stability of the Bailey beams is ensured;
s3, after the multi-layer Bailey beam 5 is installed, arranging a top cross beam 8 on the upper portion of the Bailey beam 5, connecting the top cross beam 8 with the Bailey beam 5 in a locking manner, welding a jack 9 above the top cross beam 8, and distributing a beam frame 10 on the upper portion of the jack 9 so as to achieve the effect of jacking the Bailey bracket 6 of the steel box beam;
s4, injecting water into the waterproof bin of the ship body to enable the ship body to sink to meet the jacking height and jacking tonnage;
s5, starting the middle towing ship 1, driving the three towing ships 1 to the bottom of the steel box girder bailey bracket 6, parking the three towing ships 1 in parallel, and fastening the cable-carrying piles of the three towing ships 1 by cables
S6, discharging water in a water-proof bin of the towing ship 1 to enable the ship body to slowly float to the bottom of the steel box girder bailey bracket 6, pausing water discharge when a distribution beam frame 10 on a top jack 9 contacts the bottom of the steel box girder bailey bracket 6, starting the jack 9 on the same side, slowly erecting the steel box girder bailey bracket 6 to form a ship body transportation longitudinal space, observing in time to ensure that the ship body and the steel box girder bailey bracket 6 are balanced, ensuring the stability of the ship body, avoiding the overturning and other problems, fixing the distribution beam frame 10 and the steel box girder bailey bracket 6 through a chain block and a limiter, and simultaneously respectively tensioning the beam I-steel 2 at the joint of three towing ships 1 by using a chain block and a steel wire rope to prevent the ship body from overturning inwards;
s7, starting the towing ship 1, and carrying the steel box girder bailey bracket 6 to a position of a temporary shoreside splicing site in a floating mode;
and S8, hoisting the Bailey beam 5 groups to the shore by using a 500t floating crane, and disassembling and hoisting away in the assembly site.
The three towing ships are arranged, the middle towing ship is used for towing, the synchronization and the stability of the ship body can be effectively controlled, deviation is avoided, the towing ships on the two sides are used, the loaded area of the ship body can be increased, and the stability and the anti-overturning performance are high; in addition, the Bailey beams 5 are adopted as the integral bracket, so that the integral stability of the bracket is increased, the strength and the rigidity of the Bailey beams 5 can be fully utilized, the stress of a lower ship body is uniform, and meanwhile, in order to further increase the anti-overturning and stability of the bracket in the driving and jacking processes, the mooring ropes are arranged to be connected with the ship body, so that the Bailey beams are simple and convenient to install, strong in stability and capable of being recycled; in addition, the three towing ships 1 can be suitable for multi-span ship connection by using the I-steel cross beams and adopting the long round holes 3, the limit and interval requirements of the ship transverse connection can be effectively controlled, the stability of the ship is improved, the ship can be fixed under the condition of different intervals by using the long round holes 3, the operability is strong, and the recycling rate is high; finally, the system of the Bailey bracket top beam 8 and the distribution beam frame 10 can increase the jacking synchronism of the jack 9, ensure the uniform stress of the Bailey beam 5 by utilizing the distribution beam frame 10, and simultaneously play a role in stamping the jack 9 under the combined action of the distribution beam frame 10 and the top beam 8 so as to further increase the strength and reliability of the system; the jacking force of the jack 9 and the buoyancy of the ship body are balanced mutually, so that the buoyancy is the same as the fixed buoyancy, the steel box girder bailey bracket 6 needing to be disassembled is slowly lifted, and the deformation and rigidity requirements of the steel box girder bailey bracket are effectively controlled.
The invention has the advantages of safety, reliability, high construction speed and strong popularization.
As above, while the invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as being 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 method for jacking and disassembling a Bell support under a bridge is characterized by comprising the following steps:
s1, connecting three suspended towing ships into a ship body through beam I-steel, and arranging ground anchors on the three towing ships respectively to anchor the three towing ships to the shore or the water bottom so as to keep the ship body stable;
s2, forming a group of 2 Bailey beams on a beam I-steel longitudinally assembled to the floating vessel, and vertically erecting a plurality of layers until the Bailey beams reach the disassembly height of the Bailey bracket of the steel box girder;
s3, arranging a top cross beam on the upper portion of the Bailey beam, connecting the top cross beam with the Bailey beam in a locking manner, welding a jack above the top cross beam, and distributing beam frames on the upper portion of the jack;
s4, injecting water into the waterproof bin of the ship body to enable the ship body to sink to meet the jacking height and jacking tonnage;
s5, starting the middle towing boat, driving the three towing boats to the bottom of the steel box girder bailey bracket, parking the three towing boats in parallel, and bolting the cable-carrying piles of the three towing boats by cables
S6, discharging water in the water-proof bin of the towing ship to enable the ship body to slowly float to the bottom of the steel box girder Bailey bracket, stopping water discharging when a distribution beam frame on a top jack contacts the bottom of the steel box girder Bailey bracket, starting the jack on the same side to slowly support the steel box girder Bailey bracket, fixing the distribution beam frame and the steel box girder Bailey bracket, and simultaneously tensioning cross beam I-beams at the joints of three towing ships by using a chain block and a steel wire rope;
s7, starting a towing ship, and carrying the steel box girder bailey bracket to a position of a temporary shoreside assembly site in a floating mode;
and S8, hoisting the Bailey beam group to the shore by using a 500t floating crane, and disassembling and hoisting the Bailey beam group at the assembly site.
2. The method for jacking and disassembling the Belley bracket under the bridge according to claim 1, wherein: in step S1, at least three oblong holes are formed in the beam i-steel in the horizontal direction, and the towing boat and the beam i-steel are connected by bolts inserted into the oblong holes to complete the fixing of the three towing boats.
3. The method for jacking and disassembling the Belley bracket under the bridge according to claim 1, wherein: in the step S2, the Bailey beam is in a form that the lower part is short and the upper part is wide, the Bailey beam, the beam I-steel and the multi-layer Bailey beam are locked by adopting the lock catches, and the Bailey beam is provided with the inhaul cable at the short side to be fixed with the ship body.
4. The method for jacking and disassembling the Belley bracket under the bridge according to claim 1, wherein: in step S6, the distribution beam frame and the steel box beam beret bracket are fixedly connected through a chain block and a stopper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210678732.0A CN114875806A (en) | 2022-06-15 | 2022-06-15 | Method for jacking and disassembling bailey bracket under bridge |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210678732.0A CN114875806A (en) | 2022-06-15 | 2022-06-15 | Method for jacking and disassembling bailey bracket under bridge |
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| CN114875806A true CN114875806A (en) | 2022-08-09 |
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| CN202210678732.0A Pending CN114875806A (en) | 2022-06-15 | 2022-06-15 | Method for jacking and disassembling bailey bracket under bridge |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990080475A (en) * | 1998-04-17 | 1999-11-05 | 김형벽 | Offshore bridge and fixed offshore structure installation device and method |
| CN204802032U (en) * | 2015-06-25 | 2015-11-25 | 中国中铁航空港建设集团有限公司 | Transportation by driving ship that transportation by driving was turned and is erect steel longeron |
| CN107244388A (en) * | 2017-05-17 | 2017-10-13 | 中铁十九局集团有限公司 | Floating towboat and bridge erection system, method for installing girder steel |
| CN206602481U (en) * | 2017-04-05 | 2017-10-31 | 合肥聚能新能源科技有限公司 | A kind of float-type floating constraint truss |
| CN107761573A (en) * | 2017-11-29 | 2018-03-06 | 中铁二十四局集团安徽工程有限公司 | Crossing bridge bottom Bailey beam falsework jacking transportation by driving method for dismounting |
| CN216515148U (en) * | 2021-11-08 | 2022-05-13 | 杭州地方铁路开发有限公司 | Floating pier system device for curve steel box girder floating support pushing |
-
2022
- 2022-06-15 CN CN202210678732.0A patent/CN114875806A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR19990080475A (en) * | 1998-04-17 | 1999-11-05 | 김형벽 | Offshore bridge and fixed offshore structure installation device and method |
| CN204802032U (en) * | 2015-06-25 | 2015-11-25 | 中国中铁航空港建设集团有限公司 | Transportation by driving ship that transportation by driving was turned and is erect steel longeron |
| CN206602481U (en) * | 2017-04-05 | 2017-10-31 | 合肥聚能新能源科技有限公司 | A kind of float-type floating constraint truss |
| CN107244388A (en) * | 2017-05-17 | 2017-10-13 | 中铁十九局集团有限公司 | Floating towboat and bridge erection system, method for installing girder steel |
| CN107761573A (en) * | 2017-11-29 | 2018-03-06 | 中铁二十四局集团安徽工程有限公司 | Crossing bridge bottom Bailey beam falsework jacking transportation by driving method for dismounting |
| CN216515148U (en) * | 2021-11-08 | 2022-05-13 | 杭州地方铁路开发有限公司 | Floating pier system device for curve steel box girder floating support pushing |
Non-Patent Citations (1)
| Title |
|---|
| 周伟明;: "大跨度贝雷梁支架顶升浮运拆除施工技术研究", 铁道建筑技术, no. 10, pages 77 - 81 * |
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