阅读说明：本技术 一种超宽箱梁多桁片组合挂篮的施工方法 (A kind of construction method of the more purlin piece combination Hanging Baskets of ultra-wide box beam ) 是由 郑涛 秦晓锋 贺恩明 张涛 于 2019-09-03 设计创作，主要内容包括：本发明涉及一种超宽箱梁多桁片组合挂篮的施工方法,包括一种超宽箱梁多桁片组合挂篮的施工方法,包括A挂篮的拼装、B模拟荷载预压、C挂篮就位及模板安装、D钢筋、预埋件以及预应力体系安装、E混凝土灌注及养护、F张拉以及压浆、G挂篮前移,进入下一梁段的施工循环七个步骤；通过四榀主桁架的主纵梁能有效的分配弯矩,协调变形,对主梁的刚度要求较小；并且挂篮的结构简单,安装方便快捷,成本低；实用性强,安全系数高,降低施工过程中的安全风险。(The present invention relates to a kind of construction methods of the more purlin piece combination Hanging Baskets of ultra-wide box beam, construction method including a kind of more purlin piece combination Hanging Baskets of ultra-wide box beam, assembly, B simulation load precompressed including A Hanging Basket, C Hanging Basket is in place and template installation, D reinforcing bar, built-in fitting and prestress system installation, E filling concrete and maintenance, F tensioning and mud jacking, G hanging basket advancing, the construction into next beam section recycle seven steps；Moment of flexure can be effectively distributed by the main longitudinal grider of four Pin main couples, compatible deformation is smaller to the rigidity requirement of girder；And the structure of Hanging Basket is simple, quick and easy for installation, at low cost；Practical, safety coefficient is high, reduces the security risk in work progress.)

1. a kind of construction method of the more purlin piece combination Hanging Baskets of ultra-wide box beam, which comprises the steps of:

The assembly of A Hanging Basket:

Main couple is installed first, the central symmetry for having poured girder along 0~2# is laid with 4 tracks；4 Pin English trusses are fixed respectively Onto track, and by single Pin main couple anchoring temporarily；The upper beam before being located at two ipsilateral English truss front ends and installing, utilizes cross Beam reinforces two ipsilateral English trusses；

Then the bracket bowl buckle frame part that 0~2# of girder has poured girder, and distribution beam in the Bailey beam of bracket and thereon are removed Over-assemble lower platform, by with tackle pulley by lower platform slide in place, using preceding sunpender, rear suspension bar and walking sunpender will under The anchoring of portion's platform；

B simulates load precompressed:

Precompressed is loaded to be carried out according to the grade of Hanging Basket bearing load 60%, 80%, 100%, 110%, and every grade of load is symmetrical, equal Weighing apparatus；Adjustment value of the deformation data of record load front and back as Hanging Basket mould absolute altitude；

C Hanging Basket is in place and template is installed:

It is pushed with model hydraulic jack back-pressure by 4 Pin triangle main couples using 4, makes the walking of 4 Pin main couple back-pressures in place, and It is anchor rod anchored after being arranged 2 groups；

Lower platform is promoted in place by the screw jack on each sunpender；And bed die is completed in lower platform (containing oblique Web bed die, anchor block bed die), the installation of raising middle flask template, side case internal model, tabula beam forms, end head formwork；

D reinforcing bar, built-in fitting and prestress system installation:

Reinforcing bar includes two layers of reinforced mesh of bottom plate skew web plate, diaphragm reinforced mesh, straight web reinforcement mesh sheet, entity section and anchor Block reinforcing bar, two layers of reinforced mesh of top plate；Reinforcing bar is preferably mechanically connected, and wherein the splice of half is in staggered distribution；In diaphragm Segmentation installation bellows in reinforced mesh, and lashing steel wire bundle；

Built-in fitting includes Hanging Basket preformed hole built-in fitting, suspender belt preformed hole built-in fitting, Hanging Basket aisle built-in fitting, to put rope aisle pre-buried Part, hanging cable built-in fitting, construction survey built-in fitting；

E filling concrete and maintenance:

It applies in casting concrete, according to from low to high, is carried out by the sequence of outer lateral centre；And the top surface of beam body is smeared with wood Slurry is received to smooth out；Curing agent, covering and heat insulating layer, maintenance 7 days or more are sprayed in concrete surface；

F tensioning and mud jacking；

It after concrete strength reaches 90%, is demoulded, and carries out prestressed stretch-draw to lateral sequence by longitudinal；It is complete in tensioning Bi Hou, mud jacking, sealing end；

G hanging basket advancing, the construction into next beam section recycle.

2. the construction method of the more purlin piece combination Hanging Baskets of ultra-wide box beam according to claim 1, it is characterised in that: the Hanging Basket Demoulding and walking process be,

A glides the smooth rail of side form in diaphragm plate, lays flat to lower platform stringer；

Interior backform frame is declined 190-200cm using interior backform sunpender by b, and is rested on lower platform stringer；

C, by lower platform entire lowering, makes interior backform top surface away from diaphragm bottom 15- using preceding sunpender, rear suspension bar, walking sunpender 20cm；

D goes to lower platform rear portion load on walking beam, and walking beam in spreading, removes rear suspension bar；

E removes rear portion and walks track to front end, installs counter-force seat and jack, is arranged using rear anchor hole laying traveling wheel reverse drawing is switched It applies；

F makes English truss walk forward after a jack stroke to stop；Anchor pole after new one group of installation, then last one will be located at Simultaneously anchor is tight for anchor pole Forward after group group；Finally anchor pole behind one group of centre of dismounting；And

Circulate operation extremely walking is in place；

G installs rear suspension bar, promotes lower platform using front and back sunpender, removes walking sunpender, Forward walking support roller；Installation internal model is hung Bar promotes interior backform frame in place.

3. the construction method of the more purlin piece combination Hanging Baskets of ultra-wide box beam according to claim 1, it is characterised in that: in concrete In filling process, the sequence of perfusion are as follows: bottom plate → skew web plate → side case crossbeam → straight web → intermediate box crossbeam；It is pushed up when being filled into When face, two sides entity section is first perfused, side case top is then perfused, finally completes the perfusion on intermediate box top.

4. the construction method of the more purlin piece combination Hanging Baskets of ultra-wide box beam according to claim 2, it is characterised in that: pacify in reinforcing bar During dress, the longitudinal reinforcement of half quantity is stretched out into cantilever segment and accounts for 1/10th of overall length, the other half longitudinal reinforcement stretches out Cantilever segment accounts for a quarter of overall length.

5. the construction method of the more purlin piece combination Hanging Baskets of ultra-wide box beam according to claim 2, it is characterised in that: in concrete In maintenance processes, when daily mean temperature is lower than 5 degree, handled by concreting in cold-weather, in concrete surface plastic covering film, Heat preservation is blocked with straw mattress in beam body front and back end and two sides, and pays attention to keeping beam body wet；

When daily mean temperature is higher than 5 degree, handles by concrete construction in summar, in concrete surface plastic covering film, and set Set spray waterpipe maintenance.

6. the construction method of the more purlin piece combination Hanging Baskets of ultra-wide box beam according to claim 1, it is characterised in that: pacify in template During dress, first girder center line is drawn on platform hanging basket, diaphragm center line, to be poured section of front end of line, and therefrom by bottom plate Line is to two sides splicing.

7. the construction method of the more purlin piece combination Hanging Baskets of ultra-wide box beam according to claim 3, it is characterised in that: in tensioning Cheng Zhong successively carries out tensioning according to 0 → 20% б of the б k → 40% б k → б k of k → 100% (anchoring) → 0.

8. the construction method of the more purlin piece combination Hanging Baskets of ultra-wide box beam according to claim 2, it is characterised in that: the triangle The front fulcrum and rear fulcrum of truss are that ship shape drags son；Ship shape drags son to move in fashioned iron track.

Technical field

The present invention relates to cradle construction fields, and in particular to a kind of construction method of the more purlin piece combination Hanging Baskets of ultra-wide box beam.

Background technique

Cradle construction refers to when pouring cantilever glider bridge, using cradle construction method, is segmented cantilever operation on the spot.It is not required to Want erect bracket and without using large-scale crane.Cradle construction has that structure is light, it is simple and convenient to spell system, without ballast compared with other methods The advantages that.

For ultra-wide box beam (width is more than 30m) cantilever construction, when the segment in its ultra-wide section is poured, according to Conventional Hanging Basket is constructed, and the girder of Hanging Basket needs enough rigidity that can meet load bearing demand；The big girder of rigidity From great, anchor point counter-force is larger, and the safety of structure is small.And due to beam section mistake when the beam section Hanging Basket cantilever construction of ultra-wide section Weight causes to bend unstable phenomenon.

Therefore designing a kind of safe and efficient Hanging Basket cantilever pouring scheme for more case ultra-wide beams is this field urgent need to resolve The problem of.

Summary of the invention

To solve the problem of to lack the construction method of ultra-wide box beam in the prior art, the present invention provides a kind of ultra-wide casees The construction method of the more purlin piece combination Hanging Baskets of beam.

To achieve the above object, the application adopts the technical scheme that:

A kind of construction method of the more purlin piece combination Hanging Baskets of ultra-wide box beam, construction procedure are as follows:

The assembly of A Hanging Basket:

Main couple is installed first, the central symmetry for having poured girder along 0~2# is laid with 4 tracks；4 Pin English trusses are distinguished Fixed on track, and by single Pin main couple anchoring temporarily；The upper beam before being located at two ipsilateral English truss front ends and installing, benefit Two ipsilateral English trusses are reinforced with crossbeam；

Then the bracket bowl buckle frame part that 0~2# of girder has poured girder, and point in the Bailey beam of bracket and thereon are removed Preceding sunpender, rear suspension bar and walking sunpender are utilized by being slid lower platform in place with tackle pulley with beam over-assemble lower platform Lower platform is anchored；

B simulates load precompressed:

Precompressed is loaded to be carried out according to the grade of Hanging Basket bearing load 60%, 80%, 100%, 110%, every grade of load is symmetrical, It is balanced；Adjustment value of the deformation data of record load front and back as Hanging Basket mould absolute altitude；

C Hanging Basket is in place and template is installed

It is pushed with model hydraulic jack back-pressure by 4 Pin triangle main couples using 4；Arrive the walking of 4 Pin main couple back-pressures Position is promoted lower platform in place by the screw jack on each sunpender；And bed die is completed in lower platform and (contains oblique abdomen Plate bed die, anchor block bed die), the installation of raising middle flask template, side case internal model, tabula beam forms, end head formwork；

D reinforcing bar, built-in fitting and prestress system installation

Reinforcing bar includes two layers of reinforced mesh of bottom plate skew web plate, diaphragm reinforced mesh, straight web reinforcement mesh sheet, entity section And anchor block reinforcing bar, two layers of reinforced mesh of top plate；Reinforcing bar is preferably mechanically connected, and wherein the splice of half is in staggered distribution；In cross Bellows, and lashing steel wire bundle are installed every segmentation in beam steel mesh sheet；

Built-in fitting includes Hanging Basket preformed hole built-in fitting, suspender belt preformed hole built-in fitting, Hanging Basket aisle built-in fitting, puts rope aisle Built-in fitting, hanging cable built-in fitting, construction survey built-in fitting；

E filling concrete and maintenance

It applies in casting concrete, according to from low to high, is carried out by the sequence of outer lateral centre；And the top surface of beam body is used Wood is smeared receipts slurry and is smoothed out；Curing agent, covering and heat insulating layer, maintenance 7 days or more are sprayed in concrete surface；

F tensioning and mud jacking；

It after concrete strength reaches 90%, is demoulded, and carries out prestressed stretch-draw to lateral sequence by longitudinal；It is opening After drawing, mud jacking, sealing end.

G hanging basket advancing, into the circulation of the construction of next beam section.

Scheme provided by the invention rapidly and efficiently can carry out cantilever pouring to ultra-wide box beam, pass through four Pin main couples Main longitudinal grider can effectively distribute moment of flexure, and compatible deformation is smaller to the rigidity requirement of girder；And the structure of Hanging Basket is simple, installation It is convenient and efficient, it is at low cost；Practical, safety coefficient is high, reduces the security risk in work progress.

Using technical solution of the present invention,

Preferably, the demoulding of the Hanging Basket and walking process are as follows:

A glides the smooth rail of side form in diaphragm plate, lays flat to lower platform stringer；

Interior backform frame is declined 190-200cm using interior backform sunpender by b, and is rested on lower platform stringer；

C, by lower platform entire lowering, makes interior backform top surface away from diaphragm bottom using preceding sunpender, rear suspension bar, walking sunpender 15-20cm；

D goes to lower platform rear portion load on walking beam, and walking beam in spreading, removes rear suspension bar；

E removes rear portion and walks track to front end, installs counter-force seat and jack, rear anchor hole laying traveling wheel is anti-using switching Drawing measure；

F makes English truss walk forward after a jack stroke to stop；Anchor pole after new one group of installation, then will be located at last One group of group after anchor pole Forward and anchor it is tight；Finally anchor pole behind one group of centre of dismounting；And circulate operation extremely walking is in place；

G installs rear suspension bar, promotes lower platform using front and back sunpender, removes walking sunpender, Forward walking support roller；In installation Mould sunpender promotes interior backform frame in place.Its knockout course is simple, fast.It can be improved construction efficiency.

Preferably, during filling concrete, the sequence of perfusion are as follows: bottom plate → skew web plate → side case crossbeam → straight web → intermediate box crossbeam；When being filled into top surface, two sides entity section is first perfused, side case top is then perfused, finally completes intermediate box top Perfusion.It is able to maintain the balance of lower platform, guarantees construction safety.

Preferably, during reinforcement installation, the longitudinal reinforcement of half quantity is stretched out into cantilever segment and accounts for overall length very One of, the other half longitudinal reinforcement stretches out a quarter that cantilever segment accounts for overall length.Guarantee the intensity of structure.

Preferably, during concrete curing, when daily mean temperature be lower than 5 degree, handled by concreting in cold-weather, In Concrete surface plastic covering film blocks heat preservation with straw mattress in beam body front and back end and two sides, and pays attention to keeping beam body wet；

When daily mean temperature is higher than 5 degree, handled by concrete construction in summar, in concrete surface plastic covering film, And spray waterpipe maintenance is set.Guarantee the setting rate and intensity of concrete.

Preferably, in template installation process, girder center line is drawn on platform hanging basket, diaphragm center line is to be poured Section front end of line, and by bed die from middle line to two sides splicing.

Preferably, the front fulcrum of the English truss and rear fulcrum are that ship shape drags son；Ship shape drags son to move in fashioned iron track It is dynamic.Guarantee that English truss is mobile steady.

Beneficial effects of the present invention are that safe and efficient can construct for ultra-wide box beam, and the structure of Hanging Basket is simple；By force Degree is high, and cost is relatively low, stable working.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of Hanging Basket in the present invention.

Fig. 2 is the structural schematic diagram of the Hanging Basket in Construction State.

Appended drawing reference involved in attached drawing and component part are as follows:

Girder 1, English truss 2, preceding upper beam 3, preceding sunpender 4, rear suspension bar 5, walking sunpender 6, rear anchor beam 7, steel type are poured Slideway 8, lower platform 9.

Specific embodiment

In order to be easy to understand the technical means, the creative features, the aims and the efficiencies achieved by the present invention, tie below Conjunction is specifically illustrating, and the present invention is further explained.

As depicted in figs. 1 and 2, the construction method of the more purlin piece combination Hanging Baskets of a kind of ultra-wide box beam.Wherein, Hanging Basket includes: to hold Weight system, suspension system, anchor system, lower platform system.

Its construction procedure is as follows:

The assembly of A Hanging Basket:

Main couple is installed first, the central symmetry for having poured girder along 0~2# is laid with 4 tracks；4 Pin English trusses 2 are divided It Gu Dingdao not be on track, and by single Pin main couple anchoring temporarily；The upper beam before being located at ipsilateral two English trusses, 2 front end and installing 3, two ipsilateral English trusses 2 are reinforced using crossbeam；

Then the bracket bowl buckle frame part that 0~2# of girder has poured girder, and point in the Bailey beam of bracket and thereon are removed Preceding sunpender 4, rear suspension bar 5 and walking are utilized by being slid lower platform 9 in place with tackle pulley with beam over-assemble lower platform 9 Sunpender 6 anchors lower platform 9.Wherein, the front fulcrum of English truss 2 and rear fulcrum are that ship shape drags son；Ship shape drags son in fashioned iron It is moved in track.

B simulates load precompressed:

Precompressed is loaded to be carried out according to the grade of Hanging Basket bearing load 60%, 80%, 100%, 110%, and cloth carries section form Simulate beam body load assignment.Every grade of load is symmetrical, balanced, after the completion of precompressed, and into classification removes heap loading, while measuring Hanging Basket Resilience value.After the completion of load examination, measurement data is summarized, and forms loading test report, as Hanging Basket mould absolute altitude Adjustment value.

C Hanging Basket is in place and template is installed:

It is pushed with model hydraulic jack back-pressure by 4 Pin triangle main couples using 4；Arrive the walking of 4 Pin main couple back-pressures Position, and it is anchor rod anchored after 2 groups of setting；Then bed die (bed die containing skew web plate, anchor block bed die), raising middle flask are completed in lower platform 9 The installation of template, side case internal model, tabula beam forms, end head formwork.

Bed die customizes punching block using bulk, is decorated with girder center line on platform hanging basket, diaphragm center line, before to be poured section End line, and by bottom plate mould middle line to two sides splicing, bed die is welded in the distribution beam of lower platform 9 by connecting rod.Skew web plate Bed die and anchor block template are laid immediately on the stringer of lower platform 9 by bracket.Raising middle flask template includes being made of customization punching block Straight web side form and girder be open roof box bed die.

Opening box template suspender spray of molten steel frame lifting, with side case web corner strut support top, the straight web of side case Template combined steel, every segment are spelled and are torn open.To prevent internal model from floating, installed between wedged bottom mould and skew web plate bed die in the case of side To lacing wire.End mould is the timber shuttering vertical with bed die.It is adjusted in the turning point of each template using wooden model or timber wedge.

D reinforcing bar, built-in fitting and prestress system installation:

Reinforcing bar includes two layers of reinforced mesh of bottom plate skew web plate, diaphragm reinforced mesh, straight web reinforcement mesh sheet, entity section And anchor block reinforcing bar, two layers of reinforced mesh of top plate；

Bottom plate, skew web plate, roof steel bar and entity section and all scene bindings on bridge of anchor block reinforcing bar.Reinforcing bar is preferably mechanical Connection, wherein the splice of half is in staggered distribution；The segmentation installation bellows in diaphragm reinforced mesh, and lashing steel strand wires Beam；

Built-in fitting includes Hanging Basket preformed hole built-in fitting, suspender belt preformed hole built-in fitting, Hanging Basket aisle built-in fitting, puts rope aisle Built-in fitting, hanging cable built-in fitting, construction survey built-in fitting.

E filling concrete and maintenance:

During concrete perfusion, concrete material is transported to both ends girder by concrete pump delivery pipe, according to From low to high, it is carried out by the sequence of outer lateral centre；And receipts slurry is smeared into wood in the top surface of beam body and is smoothed out；And according to 50 every layer of ㎝'s Highl stratification perfusion, is inserted into vibrating spear vibration compacting.Guarantee that muscle phenomenon is revealed without honeycomb in its surface, seam is good.Pitted skin area is not Obtaining is more than ipsilateral area 1%.Curing agent, covering and heat insulating layer, maintenance 7 days or more are sprayed in concrete surface.When concrete strength reaches End mould and dabbing are removed when to 2.5Mpa.

F tensioning and mud jacking:

It after concrete strength reaches 90%, is demoulded, and carries out prestressed stretch-draw to lateral sequence by longitudinal；It is opening During drawing, successively carried out according to the grade of 0 → 20% б of the б k → 40% б k → б k of k → 100% (anchoring) → 0.And it records each The elongation in stage.

Longitudinal prestressing tension sequence should be carried out by the symmetrical principle in upper and lower, left and right, and scene needs to be equipped with very heavy enough Top, to meet the needs of two symmetrical boom segments simultaneous tensions.Tensioning fracture of wire, stripped thread must not exceed section wire sum 1%；The sum of both ends amount of recovery must not exceed 6mm, every end slippage≤3mm；Steel beam elongation error≤± 6%.

After all longitudinal and transverse prestressing tendon tensioning, mud jacking, sealing end are carried out.

G hanging basket advancing, the construction into next beam section recycle.

Wherein, the demoulding of Hanging Basket and walking process are as follows:

A glides the smooth rail of side form in diaphragm plate, lays flat to 9 stringer of lower platform.

Interior backform frame is declined 190-200cm using interior backform sunpender by b, and is rested on 9 stringer of lower platform.

C, by 9 entire lowering of lower platform, makes interior backform top surface away from tabula using preceding sunpender 4, rear suspension bar 5, walking sunpender 6 Beam bottom 15-20cm.

D goes to 9 rear portion load of lower platform on walking beam；And walking beam in spreading；Remove rear suspension bar 5.

E removes rear portion and walks track to front end, installs counter-force seat and jack；Using switching, rear anchor hole laying traveling wheel is anti- Drawing measure.

F makes English truss 2 walk forward after a jack stroke to stop；Anchor pole after new one group of installation, then will be located at most Simultaneously anchor is tight for anchor pole Forward after one group of group afterwards；Finally anchor pole behind one group of centre of dismounting；And circulate operation extremely walking is in place；

G installs rear suspension bar 5, promotes lower platform 9 using front and back sunpender 5, removes walking sunpender 6, Forward walking support roller；Peace Internal model sunpender is filled, promotes interior backform frame in place.

In entire work progress, need to carry out dual control to Main beam linearity and Suo Li；Suo Li control with after hanging guy rope, it is mixed Three phases altogether after solidifying soil perfusion and after permanent cable tension.Main beam linearity control includes that Hanging Basket sets elevation, concrete in place Elevation is total to four-stage in place for elevation and Hanging Basket decline traveling after elevation, inclined guy cable stretching after perfusion, in tower displacement, girder Temperature etc. is modified when journey, girder middle line, construction.

Wherein, during concrete curing, when daily mean temperature be lower than 5 degree, handled by concreting in cold-weather, mixing Solidifying soil surface plastic covering film, blocks heat preservation with straw mattress in beam body front and back end and two sides, and pays attention to keeping beam body wet；The same day When temperature on average is higher than 5 degree, is handled by concrete construction in summar, in concrete surface plastic covering film, and shower water is set Pipe maintenance.

The basic principles, main features and advantages of the invention have been shown and described above.The technical staff of the industry should Understand, the present invention is not limited to the above embodiments, and the description in above embodiments and description only illustrates original of the invention Reason, without departing from the spirit and scope of the present invention, the present invention also has other changes and improvements, these changes and improvements It all fall within the protetion scope of the claimed invention.The claimed scope of the invention is by appended claims and its equivalent circle It is fixed.