CN102653938A - Offshore dismantling construction method of descending form traveler - Google Patents
Offshore dismantling construction method of descending form traveler Download PDFInfo
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- CN102653938A CN102653938A CN2011104519911A CN201110451991A CN102653938A CN 102653938 A CN102653938 A CN 102653938A CN 2011104519911 A CN2011104519911 A CN 2011104519911A CN 201110451991 A CN201110451991 A CN 201110451991A CN 102653938 A CN102653938 A CN 102653938A
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Abstract
The invention discloses an offshore dismantling construction method of a descending form traveler, which is suitable for a large form traveler which is suitable for over-water construction and has the characteristics of beam body pouring forming and short dismantling period. The offshore dismantling construction method can adapt to dismantling of high piers with heights of 7m and above 7m. The technical scheme is as follows: the top surface of a box girder is provided with a preformed hole where a winch is put down, a form traveler main girder is integrally put down by using a bridge floor winch, a temporary pier is built by using a steel pipe pile and the steel pipe pile is matched with a bridge girder erection machine winch for integrally hoisting the main girder to a bridge floor, and finally the main girder is decomposed on the bridge floor. Compared with the traditional dismantling scheme of erecting a bracket by putting the main girder in water and piling, the offshore dismantling construction method has the advantages of better safety, short construction period, low construction cost, and no damage to the original operation property of equipment, and fully considers the operability and the safety of the construction from the technical details and the management.
Description
Technical field
The present invention relates to a kind of building implements construction method; The marine construction of removing of specifically a kind of downlink movable mould frame; The beam body that it is applicable to over-water construction is built moulding, is removed the tight large-scale mobile framework equipment of construction period, can adapt to 7 meters and more than high pier remove.
Background technology
The MSS of mobile formwork system (Move Support System) is the comparatively advanced technology of present world bridge construction; Need not during construction under bridge, falsework to be set; And adopting two steel work girder supporting exterior sheathings that are supported on the bracket, two girders are supported on the bridge bearing platform through angle-table bracket and steel post.Critical piece has girder and exterior sheathing, cross member, the bridge of the nose, template support, counterweight and counter-balanced carriage and cross member etc.Mobile formwork configuration full hydraulic system, its walking and formwork etc. are accomplished by hydraulic system.The technical characterstic of downstriker mobile moldbase offshore construction is: it is many that slippage bracket has a number of turnover; Turnaround time is short, uses the few characteristics of auxiliary equipment, and automaticity is high; Reduced the waste of manpower goods and materials; Be specially adapted to the construction of multispan cast-in-situ box girder, both guaranteed workmanship, again can accelerating construction progress.Guarantee the civilized construction and the safe construction of job site, the application of changing in modern times in the bridge construction is increasingly extensive.
Because Construction Through Form on Traveler all at sea, and the cast-in-situ box girder of this moment forms, and the weight of mould bases own is heavier, and the loop wheel machine scope of operation is affected, and has brought very big difficulty therefore for the dismounting work of mobile formwork.Traditional dismounting method is the erection bracket dismounting scheme of driving piles in the water under the girder, and main feature is:
1, girder need be driven piles in girder line of travel (direction of retreat) water before removing; Support because all need stake under every side girder of every cover mould bases, so practicing thrift under cost and the prerequisite of duration, every side girder is driven piles 6 to 10 down; Single fixing, its stable relative mistake is a little; Also increasing along with decentering quantity increases the quantity of driving piles in addition, then the operation on the sea activity increases, and then potential safety hazard increases greatly.
2, work such as the cutting of each joint girder, decomposition, lifting all need constructor's operation on the afloat girder of frame, and its operation danger exists at any time.
3, marine guidance piling and fixing need 4 days, mould bases parts dismounting 10 days, girder decomposes transportation 20 days, and wherein piling is removed and can be carried out simultaneously with the girder parts, and it is 30 days that therefore single cover mould bases is removed total duration.The tight obvious duration of large-scale mobile framework equipment of construction period is oversize for removing.
4, spent labour cost, cost of materials, machinery expense were limited in 30 days.Remove single cover expense and reach 340,000 yuan.
Summary of the invention
Technical assignment of the present invention is to provide downlink movable mould frame the marine construction of removing to above-mentioned deficiency of the prior art; This method has low, the original transaction capabilities of damage equipment not of good safety, short construction period, construction cost, has taken into full account the operability and the safety of construction from ins and outs and management.
The technical solution adopted for the present invention to solve the technical problems is: the marine construction of removing of downlink movable mould frame; It is characterized in that; Reserve hoist engine at the case top surface of the beam and transfer preformed hole; Utilize the bridge floor hoist engine that the mobile formwork girder is carried out integral body and transfer, utilize again steel pipe pile set up interim pier and cooperate bridge formation machine hoist engine with the girder integral lifting to bridge floor, on bridge floor, girder is decomposed at last.
Further,
1), when in the end a hole case beam is built, reserves hoist engine by design drawing at the case top surface of the beam in advance and transfer preformed hole;
2), after construction finishes, at first according to the operational procedure die sinking, remove comprise external mold, crossbeam the mobile formwork girder with top;
3), the inside matched moulds of mobile formwork to bridge floor preformed hole correspondence position secondly, girder integral body is sling through preformed hole with the bridge floor hoist engine that is erected on the bridge floor, utilize crane to remove the parts that comprise dolly and bracket of girder support system;
4), utilize the bridge floor hoist engine girder integral body to be transferred on the pontoon that is parked in advance under the girder;
5), build interim pier dismounting platform;
6), utilizing the bridge formation machine with hoist engine integral body girder to be risen winches on the bridge floor, carries out girder then and decompose dismounting; For inboard girder; The bridge floor hoist engine is transferred to girder integral body on the pontoon " gun carriage " that is parked in advance under the girder; Utilize 2 360 ° rotary " gun carriages " base as support main beam so that inboard girder is adjusted direction below shifting out the case beam, at last with pontoon be transported to the dismounting platform near; Utilize the bridge formation machine girder to be risen again and winch on the bridge floor, carry out girder then and decompose dismounting with hoist engine integral body;
7), treat mobile formwork remove finish after, the preformed hole reinforcing bars that the case top surface of the beam is all overlap, and hang and establish template, adopt cement based to repair.
When preformed hole is set; On the wing plate of case beam; Be provided with first preformed hole, second preformed hole, the 3rd preformed hole, the 4th preformed hole that is used for the hoist engine steel cable and passes through along case beam center line bilateral symmetry; The preformed hole horizontal section is rectangle, between the first bridge pier center line, the second bridge pier center line, the first girder end line and the second girder end line; The first girder end line and the second girder end line lay respectively at the outside of the first bridge pier center line and the second bridge pier center line.
Case top surface of the beam preformed hole will satisfy the hoist engine operating space, avoids case beam transverse prestress pipeline, reserves the back reinforcing bar that exposes is carried out the brushing rustproof paint.
Behind last hole of having constructed, according to classification and construction direction packet numbering, girder whole die sinking in numbering back is to Breadth Maximum to all component of mould bases, with crane successively by the numbering symmetry remove comprise external mold, crossbeam the mobile formwork girder with top.
Lifting, dismounting dolly and bracket: mobile formwork; About inside matched moulds respectively, be positioned at preformed hole to girder under, the bridge floor hoisting machine is installed on four preformed hole positions; The steel cable of bridge floor hoist engine is through under preformed hole to the case beam, be hooked on suspender that girder is connected on; Two girders are sling to setting height simultaneously; Utilize 2 cranes from about the width of cloth remove dolly, bracket, transfer to ship; The utilization crane barge divides the bracket leg section to be removed.
Utilize the bridge floor hoist engine that girder integral body is transferred on the pontoon that is parked in advance under the girder after the support system of girder below is removed and finished again, when girder was transferred, two bridge floor hoist engines will be transferred synchronously; Ship direction across bridge under girder is parked, and the off-lying sea girder can directly utilize the bridge formation machine with hoist engine integral body the off-lying sea girder to be risen and winch on the bridge floor, carries out girder then and decomposes dismounting; Capable of using 2 360 ° of rotary gun carriages are placed base as girder when removing inboard girder, can change the girder direction so that pontoon shifts out through adjustment " gun carriage " angle, are transported at last near the interim pier of dismounting platform between right width of cloth case beam; Utilize the bridge formation machine this girder to be risen again and winch on the bridge floor, carry out girder then and decompose dismounting with hoist engine integral body.
The interim pier of dismounting platform is built mode: will in water, beat steel pipe pile before the lifting; Totally two groups 12, wherein 6 is one group, two ends of the girder that is placed in; The top of steel pipe pile vertically, laterally be connected as a single entity by i iron; Fix with bridging for double, the right side that dismounting platform interim pier is built the case beam, and and right width of cloth case beam edge between minimum spacing greater than the Breadth Maximum of girder.
Girder promotes: after building mobile formwork dismounting platform between dismounting interim pier of platform and case beam, the bridge formation machine is installed, crane ' s major girder one end is supported on by bridge formation machine supporting leg on one's body the bridge pier, and the other end is connected on the interim pier of dismounting platform; Utilize 2 stand bridge machines on the bridge formation machine to promote girder to bridge floor with hoist engine.
During lifting, wire rope is revealed all the details wire rope underlay steel plate in beam flank position along girder suspension centre position.
The invention has the beneficial effects as follows: proposed that the invention property the mobile formwork girder is carried out integral body and transferred; Utilize again steel pipe pile set up interim pier and cooperate bridge formation machine hoist engine with the girder integral lifting to bridge floor; Last job practices of on bridge floor, girder being decomposed; With respect to traditional dismounting method, this method has following characteristics:
1, aspect safety:
At first, because the girder integral hoisting is to bridge floor, its cutting disintegration is all carried out on bridge floor, has avoided the danger of personnel's offshore constructions greatly;
Secondly, will in water, drive piles 12 before the lifting, wherein 6 is one group, fixes with crossbeam and bridging for double, has ensured the steadiness that lifts shelf; For the construction that will remove many cover mould bases, piling work once can satisfy whole mould bases removes in addition, thereby has significantly reduced dangerous work such as marine guidance piling, solid stake operation, and potential safety hazard significantly reduces.
2, aspect the dismounting duration:
Marine guidance piling and fixing need 7 days, mould bases parts dismounting 10 days, girder is transferred and handling 2 days, and girder decomposes transportation 8 days, and wherein piling is removed and can be carried out simultaneously with the girder parts, and it is 20 days that therefore single cover mould bases is removed total duration.Duration has shortened 33%.
3, aspect economy:
Spent labour cost, cost of materials, machinery expense are removed about 240,000 yuan of single cover expense only for fixing in 20 days, cost savings 30%.
In a word; Compare with piling erection bracket dismounting scheme in the water under the girder; Have low, the original transaction capabilities of damage equipment not of good safety, short construction period, construction cost, taken into full account the operability and the safety of construction from ins and outs and management.
This worker method is applicable to that the beam body of over-water construction builds moulding, removes the tight large-scale mobile framework equipment of construction period, can adapt to 7 meters and more than high pier remove.For the dismounting of low pier mould bases, can girder or nose girder be promoted, guarantee horizontal plane and girder bottom clearance greater than 3 meters, to guarantee that load-carrying 200T ship can be through using this worker's method (the common headroom of 200T ship is 2.5 meters).
Description of drawings
Fig. 1 mobile formwork is removed plane preformed hole sketch map (overlooking);
Fig. 2 case beam longitudinal section preformed hole sketch map;
Fig. 3 concrete box girder preformed hole schematic cross-section;
Fig. 4 crane is removed exterior sheathing, template support, counterweight, cross member, the bridge of the nose and girder and is connected unit status sketch mapes such as truss;
Fig. 5 removes exterior sheathing, template support, counterweight, cross member, the bridge of the nose and girder and connects view behind the parts such as truss;
Fig. 6 girder suspention sketch map;
The suitable bridge of the interim pier of Fig. 7 is to front view;
Fig. 8 is the left view (interim pier direction across bridge figure) of Fig. 7;
Fig. 9 is the vertical view of Fig. 7;
Figure 10 girder promotes sketch map.
Description of reference numerals: 1 case beam, 2 first preformed holes, 3 second preformed holes, 4 the 3rd preformed holes, 5 the 4th preformed holes, 6 first bridge pier center lines; 7 second bridge pier center lines, 8 first girder end lines, 9 second girder end lines, 10 casees beam center lines, 11 first bridge piers, 12 inboard girders; 13 second bridge piers, 14 cranes, 15 off-lying sea girders, 16 bridge floor hoist engines, 17 Bei Leiliang; 18 support 19 suspenders, 20 i iron, 21 steel pipe piles, 22 bridgings; 23 crane ' s major girders, 24 bridge formation machine supporting legs, 25 bridge pier bodies, 26 wire rope, 27 bridge formation machines are used hoist engine.
The specific embodiment
This worker method is transferred for utilizing the bridge floor hoist engine that the mobile formwork girder is carried out integral body, utilize again steel pipe pile set up interim pier and cooperate bridge formation machine hoist engine with girder integral lifting successively to bridge floor, on bridge floor, girder is decomposed at last.
When in the end a hole case beam is built, reserve hoist engine by design drawing at the case top surface of the beam in advance and transfer preformed hole; After construction finished, at first according to the operational procedure die sinking, the mobile formwork girder that dismounting comprises external mold, crossbeam was with top; Secondly the inside matched moulds of mobile formwork to bridge floor preformed hole correspondence position is sling girder integral body through preformed hole with the bridge floor hoist engine that is erected on the bridge floor, utilizes crane to remove the parts that comprise dolly and bracket of girder support system; Build interim pier dismounting platform; Utilize the bridge floor hoist engine that girder integral body is transferred on the pontoon that is parked in advance under the girder again, utilize the bridge formation machine girder to be risen and winch on the bridge floor, carry out girder then and decompose dismounting with hoist engine integral body; For inboard girder; The bridge floor hoist engine is transferred to girder integral body on the pontoon " gun carriage " that is parked in advance under the girder; Utilize 2 360 ° rotary " gun carriages " base as support main beam so that inboard girder is adjusted direction below shifting out the case beam, at last with pontoon be transported to the dismounting platform near; Utilize the bridge formation machine girder to be risen again and winch on the bridge floor, carry out girder then and decompose dismounting with hoist engine integral body.(annotate: long 60 meters of girder, the quiet spacing of two bridge piers is about 47 meters).
Construction technology process:
Carrying out last when striding box girder construction, for the box girder bridge face that guarantees the mould bases girder and carry mould bases is stressedly evenly to take into account the lifting convenience of mould bases girder simultaneously, case beam reserving hole position is located at the wing plate place, and bilateral symmetry is stayed and established.
See Fig. 1; On the wing plate of case beam 1; Be provided with first preformed hole 2 that is used for that the hoist engine steel cable passes through, second preformed hole 3, the 3rd preformed hole 4, the 4th preformed hole 5 along case beam center line 10 bilateral symmetry; The preformed hole horizontal section is rectangle, between the first bridge pier center line 6, the second bridge pier center line 7, the first girder end line 8 and the second girder end line 9; The first girder end line 8 and the second girder end line 9 lay respectively at the outside of the first bridge pier center line 6 and the second bridge pier center line 7.
Case top surface of the beam preformed hole will satisfy the hoist engine operating space, avoids case beam transverse prestress pipeline, reserves the back reinforcing bar that exposes is carried out the brushing rustproof paint.
Fig. 2 is along first preformed hole 2 and second preformed hole, 3 longitudinal centre line sections among Fig. 1.Wherein, first bridge pier 11, inboard girder 12, second bridge pier 13 all are positioned at the below of case beam.
Fig. 3 concrete box girder preformed hole schematic cross-section (being among Fig. 1) along first preformed hole 2 and second preformed hole, 5 cross central line sections.
Fig. 4 crane is removed body frame upper-part view.
Behind last hole of having constructed; To all component of mould bases according to classification and construction direction packet numbering; Girder whole die sinking 3450mm in numbering back removes exterior sheathing, template support, counterweight, cross member, the bridge of the nose and girder by the numbering symmetry successively with crane 14 and connects parts such as truss.
Fig. 5 is the view of Fig. 4 after removing.
Wherein, inboard girder 12 has possessed the lifting condition with off-lying sea girder 15 tops.
Fig. 6 girder suspention sketch map.
Mobile formwork; About inside matched moulds respectively, end during to girder center distance 13000mm, this moment, girder was positioned under the preformed hole; Bridge floor hoisting machine 16 is installed on four preformed hole positions; This bridge floor hoist engine through shellfish thunder beam 17 with support 18 be located in preformed hole the top, the steel cable of bridge floor hoist engine 16 is hooked on the suspender 19 that is connected with girder through under preformed hole to the case beam.
With the girder 20cm that slings simultaneously.
Utilize 2 25T cranes from about the width of cloth remove dolly, bracket, transfer to ship.Utilization 50T crane barge divides the bracket leg section to be removed.
Utilize bridge floor hoist engine 16 that girder integral body is transferred on the pontoon that is parked in advance under the girder after the support system of girder below is removed and finished again, when girder was transferred, two bridge floor hoist engines will be transferred synchronously; Ship direction across bridge under girder is parked, because the interim pier of dismounting platform is nearer from outside girder 15, can directly utilize the bridge formation machine with hoist engine integral body 15 of outside girders to be winched on the bridge floor, carries out girder then and decomposes dismounting.Because inboard girder 12 is positioned at the inboard of case beam; So capable of using 2 360 ° of rotary gun carriages are placed base as girder when removing inboard girder 12; Can change the girder direction so that pontoon shifts out through adjustment " gun carriage " angle, be transported at last near the interim pier of dismounting platform of (off-lying sea side) between right width of cloth case beam; Utilize the bridge formation machine this girder to be risen again and winch on the bridge floor, carry out girder then and decompose dismounting with hoist engine integral body.
Fig. 7～Fig. 9 builds mode for the interim pier of dismounting platform.
Will in water, beat steel pipe pile 21 before the lifting, totally two groups 12, wherein 6 is one group; Two ends of girder are placed in; The top of steel pipe pile 21 vertically, laterally be connected as a single entity by i iron is fixed with bridging 22 for double, has ensured the steadiness that lifts interim pier.The right side that dismounting platform interim pier is built the case beam, and and right width of cloth case beam edge between minimum spacing greater than the Breadth Maximum of girder.To guarantee that girder lifts by crane smoothly.The interim pier of dismounting platform will guarantee that the depth of drive of bearing capacity and steel pipe pile satisfies the dismounting needs.The steel pipe pile embedded depth is controlled with pile penetration, and guarantees verticality, and actual embedded depth is as the criterion with on-the-spot generating capacity, and stiffener will be welded in the steel pipe pile joint, and the weld of beam, bridging will have groove in length and breadth, and carries out full weld.
Figure 10 girder promotes sketch map.
After building mobile formwork dismounting platform between dismounting interim pier of platform and case beam; The bridge formation machine is installed; This bridge formation machine mainly is made up of with hoist engine crane ' s major girder 23, bridge formation machine supporting leg 24, wire rope 26 and 27 bridge formation machines; Crane ' s major girder 23 1 ends are supported on the bridge pier body 25 by bridge formation machine supporting leg 24, and the other end is connected on the interim pier of dismounting platform.Utilize 2 10T bridge formation machines on the bridge formation machine to promote girder to bridge floor with hoist engine 27.During lifting, wire rope 26 is revealed all the details along girder suspension centre position, the wire rope underlay steel plate in beam flank position is cut off in case wire rope tears; After girder was promoted to slightly high outlet top surface of the beam, the bridge formation machine slowly moved to the bridge floor center with hoist engine along bridge formation machine truss track and transfers then to bridge floor, can be when removing at last with jackscrew with girder jack-up slightly, and be convenient to it is removed and decompose.
After treating that the mobile formwork dismounting finishes, the preformed hole reinforcing bars that the case top surface of the beam is all overlap, and hang and establish template, adopt cement based to repair.
The marine dismantling operation main points of downlink movable mould frame:
1, removes about the bridge of the nose: when removing the girder two ends bridge of the nose; Be connected the dismounting of bearing pin with the bridge of the nose for the high-strength bolt between the bridge of the nose and girder; The level that has the constructor to observe the bolt junction is at any time seen height through the loop wheel machine adjustment two joint bridge of the noses, and bolt and connecting pin are removed under free state to reduce impact force; Thereby reduce the amplitude of fluctuation of the bridge of the nose, guarantee safety.
2, remove about girder and decompose: no matter be bridge floor hoist engine or bridge formation machine with the model of hoist engine all will with mobile formwork girder weight-matched; Guarantee that the wire rope safety factor is enough, simultaneously the quality of inspection hoist engine service behaviour and wire rope before each lifting.This programme hoist engine adopts the JMN10 model, and single hoist engine elevating capacity reaches 160T, lifts by crane jointly with 2 hoist engines, and total elevating capacity reaches 320T, and single girder gross weight 153.407T satisfies the lifting requirement.Require to keep two of junction plate both sides outer most edge when removing girder top junction plate to corner bolt (single 8.8 grade bolts can bear the 173kN shearing at least); Whether the constructor will examine two joint girder joints at this moment has angle; Height if any deviation jackscrew adjustment capable of using girder; Make two joint girders basically at grade; Guarantee that latter two is removed under free state corner bolt, the impact force that two joint girders separately possibly occur suddenly when removing junction plate to reduce, thus guarantee construction safety.
3, inspection machine electric control system at any time guarantees crane ' s major girder and the hoist engine operational excellence on it.
Application example
The Transbay Bridge, Qingdao is positioned at the north, Jiaozhou Bay, is the starting point section of national freeway net Qingdao speedway to Lanzhou, main line total length 26.707km, the long 25.88km of bridge spanning the sea wherein, Huang Island side joint line length 827.319m.Transbay Bridge, Qingdao the 8th contract section is undertaken the construction of by middle friendship the 4th Co., Ltd of highway engineering office; Rise and to put pile No. so far and be: K28+200～K30+650, wherein to amount to 12, the first be 5 * 50m to superstructure; It is 4 * 50m that 2-12 joins, and totally 98 hole case beams all use mobile formwork cast-in-place at sea.After construction finished the case beam, Transbay Bridge, Qingdao the 8th contract section utilized this worker method with the marine mobile formwork complete removal of 4 cover MSS50-1800, and dismounting efficient is high, and security risk reduces, and has practiced thrift construction cost significantly.Relevant test situation such as following table: table 1 is the cost statement that a cover mobile formwork is removed by traditional branch, and table 2 is removed the cost statement of a cover mobile formwork for worker's method of the present invention.Table 3 compared for the duration of worker's method of the present invention and traditional worker's method dismounting one cover mobile formwork.
The cost statement of a cover mobile formwork is removed by the traditional branch of table 1
The cost statement of table 2 overall pulling down one cover mobile formwork of the present invention
Learn through last table analysis; Overall pulling down is practiced thrift 90500 yuan of costs than remove a cover mobile formwork by joint branch, and greatly reduces security risk, has also reduced case top surface of the beam preformed hole quantity; Remove the back preformed hole reparation quantity that finishes thereby significantly reduce, also practice thrift repair materials.
Table 3 compared for the duration of worker's method of the present invention and traditional worker's method dismounting one cover mobile formwork.
Learn that through last table analysis overall pulling down has shortened about 33% than remove a cover duration by joint branch.
Claims (10)
1. construction is removed at the downlink movable mould frame sea; It is characterized in that; Reserve hoist engine at the case top surface of the beam and transfer preformed hole; Utilize the bridge floor hoist engine that the mobile formwork girder is carried out integral body and transfer, utilize again steel pipe pile set up interim pier and cooperate bridge formation machine hoist engine with the girder integral lifting to bridge floor, on bridge floor, girder is decomposed at last.
2. the marine construction of removing of downlink movable mould frame according to claim 1 is characterized in that,
1), when in the end a hole case beam is built, reserves hoist engine by design drawing at the case top surface of the beam in advance and transfer preformed hole;
2), after construction finishes, at first according to the operational procedure die sinking, remove comprise external mold, crossbeam the mobile formwork girder with top;
3), the inside matched moulds of mobile formwork to bridge floor preformed hole correspondence position secondly, girder integral body is sling through preformed hole with the bridge floor hoist engine that is erected on the bridge floor, utilize crane to remove the parts that comprise dolly and bracket of girder support system;
4), utilize the bridge floor hoist engine girder integral body to be transferred on the pontoon that is parked in advance under the girder;
5), build interim pier dismounting platform;
6), utilizing the bridge formation machine with hoist engine integral body girder to be risen winches on the bridge floor, carries out girder then and decompose dismounting; For inboard girder; The bridge floor hoist engine is transferred to girder integral body on the pontoon " gun carriage " that is parked in advance under the girder; Utilize 2 360 ° rotary " gun carriages " base as support main beam so that inboard girder is adjusted direction below shifting out the case beam, at last with pontoon be transported to the dismounting platform near; Utilize the bridge formation machine girder to be risen again and winch on the bridge floor, carry out girder then and decompose dismounting with hoist engine integral body;
7), treat mobile formwork remove finish after, the preformed hole reinforcing bars that the case top surface of the beam is all overlap, and hang and establish template, adopt cement based to repair.
3. the marine construction of removing of downlink movable mould frame according to claim 1 and 2; It is characterized in that; When preformed hole is set, on the wing plate of case beam, be provided with first preformed hole, second preformed hole, the 3rd preformed hole, the 4th preformed hole that is used for the hoist engine steel cable and passes through along case beam center line bilateral symmetry; The preformed hole horizontal section is rectangle, between the first bridge pier center line, the second bridge pier center line, the first girder end line and the second girder end line; The first girder end line and the second girder end line lay respectively at the outside of the first bridge pier center line and the second bridge pier center line.
4. the marine construction of removing of downlink movable mould frame according to claim 3 is characterized in that case top surface of the beam preformed hole will satisfy the hoist engine operating space, avoids case beam transverse prestress pipeline, reserves the back reinforcing bar that exposes is carried out the brushing rustproof paint.
5. the marine construction of removing of downlink movable mould frame according to claim 3; It is characterized in that; Behind last hole of having constructed; According to classification and construction direction packet numbering, girder whole die sinking in numbering back is to Breadth Maximum to all component of mould bases, with crane successively by the numbering symmetry remove comprise external mold, crossbeam the mobile formwork girder with top.
6. the marine construction of removing of downlink movable mould frame according to claim 5; It is characterized in that, lifting, remove dolly and bracket: mobile formwork, about inside matched moulds respectively; Under being positioned at preformed hole to girder; The bridge floor hoisting machine is installed on four preformed hole positions, and the steel cable of bridge floor hoist engine is through under preformed hole to the case beam, be hooked on suspender that girder is connected on; The both sides girder is sling to setting height simultaneously; Utilize 2 cranes from about the width of cloth remove dolly, bracket, transfer to ship; The utilization crane barge divides the bracket leg section to be removed.
7. the marine construction of removing of downlink movable mould frame according to claim 6; It is characterized in that; The braking of girder below utilizes after dismounting finishes with support system the bridge floor hoist engine girder integral body to be transferred on the pontoon that is parked in advance under the girder again; When girder was transferred, two bridge floor hoist engines will be transferred synchronously; Ship direction across bridge under girder is parked, and outside girder can directly utilize the bridge formation machine with hoist engine integral body outside girder to be risen and winch on the bridge floor, carries out girder then and decomposes dismounting; Capable of using 2 360 ° of rotary gun carriages are placed base as girder when removing inboard girder, can change the girder direction so that pontoon shifts out through adjustment " gun carriage " angle, are transported at last near the interim pier of dismounting platform between right width of cloth case beam; Utilize the bridge formation machine this girder to be risen again and winch on the bridge floor, carry out girder then and decompose dismounting with hoist engine integral body.
8. the marine construction of removing of downlink movable mould frame according to claim 7 is characterized in that the interim pier of dismounting platform is built mode: will in water, beat steel pipe pile before the lifting; Totally two groups 12, wherein 6 is one group, two ends of the girder that is placed in; The top of steel pipe pile vertically, laterally be connected as a single entity by i iron; Fix with bridging for double, the interim pier of dismounting platform is built in the case beam outside, and the minimum clear spacing between assurance and case beam edge is greater than the girder Breadth Maximum.
9. the marine construction of removing of downlink movable mould frame according to claim 8; It is characterized in that; Girder promotes: after building mobile formwork dismounting platform between dismounting interim pier of platform and case beam; The bridge formation machine is installed, and crane ' s major girder one end is formed support pier by bridge formation machine supporting leg and case beam with bridge pier, and the other end is formed interim support pier by dismantling platform; Utilize 2 stand bridge machines on the bridge formation machine to promote girder to bridge floor with hoist engine.
10. the marine construction of removing of downlink movable mould frame according to claim 9 is characterized in that, during lifting, wire rope is revealed all the details the wire rope underlay steel plate in beam flank position along girder suspension centre position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110451991.1A CN102653938B (en) | 2011-12-29 | 2011-12-29 | Offshore dismantling construction method of descending form traveler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110451991.1A CN102653938B (en) | 2011-12-29 | 2011-12-29 | Offshore dismantling construction method of descending form traveler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102653938A true CN102653938A (en) | 2012-09-05 |
| CN102653938B CN102653938B (en) | 2014-07-30 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103243663A (en) * | 2013-05-03 | 2013-08-14 | 广东省长大公路工程有限公司 | Construction process for using bridge girder erection machine to remove T-shaped cantilever continuous rigid frame box girders |
| CN105648912A (en) * | 2015-12-11 | 2016-06-08 | 中铁大桥局集团第二工程有限公司 | Construction method for integrally transferring and splicing movable formwork |
| CN106192761A (en) * | 2016-08-12 | 2016-12-07 | 中铁二十五局集团第三工程有限公司 | A kind of method disassembling mobile formwork in bridge tunnel narrow short transition time section |
| CN106284109A (en) * | 2016-08-17 | 2017-01-04 | 中铁二十局集团第三工程有限公司 | On across the most wired bridge main beam method for dismounting |
| CN106436581A (en) * | 2016-10-10 | 2017-02-22 | 山东省路桥集团有限公司 | Upstroke type movable mould frame in-situ modularization rapid detaching construction method |
| CN106574449A (en) * | 2014-06-06 | 2017-04-19 | 索列丹斯-弗莱西奈公司 | Method for building a bridge and bridge-building apparatus |
| CN110747761A (en) * | 2019-10-21 | 2020-02-04 | 宁波市政工程建设集团股份有限公司 | Dismantling construction method and tool for temporary supporting system of small box girder type hidden cover beam of road and bridge prefabricated |
| CN111155433A (en) * | 2019-12-31 | 2020-05-15 | 中交路桥华南工程有限公司 | Method for dismantling movable formwork |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103243663B (en) * | 2013-05-03 | 2015-06-17 | 广东省长大公路工程有限公司 | Construction process for using bridge girder erection machine to remove T-shaped cantilever continuous rigid frame box girders |
| CN103243663A (en) * | 2013-05-03 | 2013-08-14 | 广东省长大公路工程有限公司 | Construction process for using bridge girder erection machine to remove T-shaped cantilever continuous rigid frame box girders |
| CN106574449A (en) * | 2014-06-06 | 2017-04-19 | 索列丹斯-弗莱西奈公司 | Method for building a bridge and bridge-building apparatus |
| CN106574449B (en) * | 2014-06-06 | 2018-12-04 | 索列丹斯-弗莱西奈公司 | It builds the method for bridge and builds the device of bridge |
| CN105648912A (en) * | 2015-12-11 | 2016-06-08 | 中铁大桥局集团第二工程有限公司 | Construction method for integrally transferring and splicing movable formwork |
| CN105648912B (en) * | 2015-12-11 | 2017-04-19 | 中铁大桥局集团第二工程有限公司 | Construction method for integrally transferring and splicing movable formwork |
| CN106192761A (en) * | 2016-08-12 | 2016-12-07 | 中铁二十五局集团第三工程有限公司 | A kind of method disassembling mobile formwork in bridge tunnel narrow short transition time section |
| CN106192761B (en) * | 2016-08-12 | 2017-09-12 | 中铁二十五局集团第三工程有限公司 | A kind of method for disassembling mobile formwork in the narrow short transition time section of bridge tunnel |
| CN106284109B (en) * | 2016-08-17 | 2018-02-06 | 中铁二十局集团第三工程有限公司 | On across both wired bridge main beam method for dismounting |
| CN106284109A (en) * | 2016-08-17 | 2017-01-04 | 中铁二十局集团第三工程有限公司 | On across the most wired bridge main beam method for dismounting |
| CN106436581A (en) * | 2016-10-10 | 2017-02-22 | 山东省路桥集团有限公司 | Upstroke type movable mould frame in-situ modularization rapid detaching construction method |
| CN110747761A (en) * | 2019-10-21 | 2020-02-04 | 宁波市政工程建设集团股份有限公司 | Dismantling construction method and tool for temporary supporting system of small box girder type hidden cover beam of road and bridge prefabricated |
| CN110747761B (en) * | 2019-10-21 | 2021-03-23 | 宁波市政工程建设集团股份有限公司 | Dismantling construction method for temporary supporting system of small box girder type hidden cover beam prefabricated on road and bridge |
| CN111155433A (en) * | 2019-12-31 | 2020-05-15 | 中交路桥华南工程有限公司 | Method for dismantling movable formwork |
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| CN102653938B (en) | 2014-07-30 |
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