CN102225580B - Method for longitudinally moving box girder internal mold - Google Patents

Method for longitudinally moving box girder internal mold Download PDF

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Publication number
CN102225580B
CN102225580B CN 201110097867 CN201110097867A CN102225580B CN 102225580 B CN102225580 B CN 102225580B CN 201110097867 CN201110097867 CN 201110097867 CN 201110097867 A CN201110097867 A CN 201110097867A CN 102225580 B CN102225580 B CN 102225580B
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China
Prior art keywords
box girder
internal mold
girder
rail wheel
inner formwork
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CN 201110097867
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CN102225580A (en
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徐建宏
吴承张
钱明剑
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China Railway 24th Bureau Group Co Ltd
Guixi Bridge Factory Co Ltd of China Railway 24th Bureau Group Co Ltd
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China Railway 24th Bureau Group Co Ltd
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Abstract

The invention relates to the field of pouring and forming of a bridge girder and a box girder, in particular to a method for longitudinally moving a box girder internal mold. The method is characterized by comprising the following steps of: hoisting an integral reinforcement cage of the box girder to a box girder prefabricated bed, and regulating and checking the reinforcement cage; sequentially installing a reverse rail wheel and a supporting frame of the reverse rail wheel on the box girder prefabricated bed in longitudinal direction, installing reverse rail wheels and supporting frames of the reverse rail wheels towards two ends of the box girder prefabricated bed, so as to form a box girder internal mold storage region outside the box girder prefabricated bed; and drawing the box girder internal mold in a contraction state by using a winch, dragging the whole box girder internal mold to the box girder prefabricated bed from the storage region along the reverse rail wheel or to the storage region from the box girder prefabricated bed, thus realizing the longitudinal moving of the box girder internal mold. By the adoption of the method, the whole internal mold can be drawn out from the one end of the girder once without manual removing of a mold plate and bolts, and can stretch and contract by virtue of a hydraulic oil cylinder. A spiral supporting rod can be suspended on a main girder, and the girder does not need to be carried out manually; and the main girder of the internal mold can be utilized as the longitudinally moving track and additional steel rails do not need to be paved.

Description

Box girder inner formwork vertical shift method
Technical field
The present invention relates to bridge box and beam and build the moulding class, particularly a kind of box girder inner formwork vertical shift method.
Background technology
In bridge on highway was built, the application of prestressing force prefabricated case beam was more and more general.And its prefabricated box girder inner formwork adopts gang form more.It is maximum a kind of template form of using in engineering construction.It is comprised of plate, angle mould, support and the connector of the some types with certain modulus, can risk sizes and geometry with it.Direct-assembling at the scene during construction can also be assembled into the bulk template in advance or component template is installed with crane for hoisting.The plate of gang form has all steel material to make, also useful steel framework and compound the making of wood (bamboo) plywood panel.Gang form not only is used for architectural engineering, science of bridge building, and underground engineering is extensive use also.But it is more difficult manually to enter the indoor form removal of case for the low clearance combined inner mold, and consuming time taking a lot of work not only makes construction cost increase, and affect construction speed; In addition, when removing, model is knocked, box girder inner formwork is deformed, the beam weight of construction after impact.
Except above-mentioned common methods, a kind of shifting formwork method of internal mold is disclosed in " full-automatic hydraulic prefabricated box girder inner formwork system " application (patent) number CN200610201284.6.Way is: inner formword is by backform and a pair of upper inner corner trim mould and hinged the forming of a pair of lower inner corner trim mould, upper oblique oil cylinder is connected between backform and upper inner corner trim mould, lower oblique oil cylinder is connected between inner corner trim mould and lower inner corner trim mould, the cavity bottom central authorities that enclose at inner formword are interval with bracing frame along case beam depth, set up rail on bracing frame, walking translation dolly on rail, the translation dolly comprises travelling wheel, vehicle frame and is fixed on pedestal beam on vehicle frame, the vehicle frame of translation dolly extends to outside inner formword, lays hydraulic power unit and operating desk on it.The present invention is simple in structure, and steel using amount is few, and is with low cost, uses simple to operate, translation dolly whole walk, facilitated the integral body discrepancy of internal mold.
Although it is certain that the disclosed technical scheme of above patent has advantages of, the movement that rail and translation dolly coordinate internal mold need to be set, increased a large amount of equipment auxiliary constructions, promote inconvenience in bridge construction; Adopt on the other hand rail, can't freely extend according to demand in practice of construction, limitation is stronger.
Summary of the invention
The objective of the invention is according to above-mentioned the deficiencies in the prior art part, a kind of box girder inner formwork vertical shift method is provided, the method utilizes internal mold self girder as the vertical shift track, and in beam making bench and two ends stretch out anti-rail wheel and bracing frame thereof be set, this anti-rail wheel is equipped with internal mold main girder, can realize the vertical shift of internal mold in the case beam by equipment such as hoist engines.
The object of the invention realizes being completed by following technical scheme:
A kind of box girder inner formwork vertical shift method is characterized in that comprising the steps: to lift the box girder integral steel reinforcement cage to beam making bench, adjusts and checked steel reinforcement cage; Anti-rail wheel and bracing frame thereof longitudinally are installed on the case girder prefabricated pedestal successively, and are stretched out to lay through beam making bench two ends and install, to consist of the box girder inner formwork storage area outside beam making bench; Adopt the hoist engine traction to be in the box girder inner formwork of contraction state, described box girder inner formwork is dragged to beam making bench or dilatory to storage area by beam making bench along anti-rail wheel is whole by storage area, realize the vertical shift of box girder inner formwork.
Be provided with the track that coordinates with described anti-rail wheel on the contact-making surface of described box girder inner formwork girder downside and described anti-rail wheel.
The described precast pedestal quantity that is provided with anti-rail wheel and bracing frame thereof in it is a plurality of, and longitudinal arrangement and anti-rail wheel and bracing frame transition connection thereof by described storage area.
Advantage of the present invention is:
1, internal mold one piece end in the beam body is extracted out, need not artificial form removal and bolt, and internal mold all adopts hydraulic jack to carry out convergent-divergent.The spiral strut can be suspended from girder, need not a dead lift and goes out the beam body.
2, utilize internal mold self girder to need not to re-lay in addition rail as the vertical shift track;
3, internal mold main girder has higher strength and stiffness, but a whole set of internal mold both integral hoisting enter mould, also can slip into voluntarily and stretch out again the oil cylinder formwork erection in steel reinforcement cage, the lifting internal mold need not suspension bracket and other special suspender, lifts very convenient;
4, internal mold from great, can effectively prevent Form floating in casting process;
5, the bracing frame of internal mold has designed the traveling undercarriage, singlely can easily bracing frame be hauled out the beam intracoelomic cavity.
Description of drawings
Accompanying drawing 1 is inner membrance overall structure schematic diagram of the present invention;
Accompanying drawing 2 is sections softened state schematic diagram in internal mold of the present invention;
Accompanying drawing 3 is sections contraction state schematic diagram in internal mold of the present invention;
Accompanying drawing 4 is inner membrance vertical shift process schematic diagram of the present invention.
The specific embodiment
Feature of the present invention and other correlated characteristic are described in further detail by embodiment below in conjunction with accompanying drawing, so that technical staff's of the same trade understanding:
As shown in Fig. 1-4, label 1-7 represents respectively: beam making bench 1, internal mold 2, anti-rail wheel 3, bracing frame 4, storage area 5, track 6, crossbeam 7.
Referring to Fig. 2, in the present embodiment, related structure mainly contains internal mold carriage and inner membrance 2:
The internal mold carriage is comprised of anti-rail wheel 3, crossbeam 7 and bracing frame 4 three parts.When internal mold carriage (totally 8) is installed, its integral body is lifted in the baseplate reinforcing bar preformed hole and (utilize in the bottom die of box-beam spilled water hole), bracing frame 4 lower end screw rods need preformed hole on corresponding bed die simultaneously, connect with bed die by nut and be connected, keep its resistance to overturning.Corresponding, be provided with described anti-rail on the contact-making surface of internal mold 2 girder downsides and described anti-rail wheel 3 and take turns the track 6 that coordinates.Adopt this kind structure, utilize internal mold 2 self girder to need not to re-lay in addition rail as the vertical shift track, and after two uniform some internal mold carriages in beam making bench 1 middle part, internal mold 2 is moved on another beam making bench 1 by a beam making bench 1, remove afterwards the internal mold carriage do not re-use, be routed to hypomere zone to be transported.When having avoided adopting on rail mobile inner membrance 2 scheme, inner membrance 2 is subject to rail length and can't continuous moving, can only take to suspend in midair means mobile and that slide and combine.
In conjunction with the said apparatus structure, below be described in detail for method in the present embodiment:
1, steel reinforcement cage is adjusted and checked to lifting box girder integral steel reinforcement cage to beam making bench 1;
2, the anti-rail in mounting end and middle part wheel 3 and bracing frame 4 relevant position to the case beam beam making bench 1;
3, adopt 5t hoist engine traction internal mold 2, internal mold 2 integral body on the anti-rail wheel 3 that leaves in storage area 5 are dragged to beam making bench 1 relevant position;
4, by the support top effect of hydraulic jack, internal mold 2 opens sequentially gradually to be propped up;
5, treat that internal mold 2 all opens, the people enters internal mold 2, adopts spiral strut and bearing pin to carry out bracing reinforcement to internal mold 2, then will hold mould to be in place;
6, the people enters box house internal mold 2 reinforcing struts is taken off during the demoulding, handles the hydraulic control system that is positioned over internal mold 2 outer ends, shrinks in order hydraulic jack;
7, harvest after, internal mold 2 is whole to descend, the track 6 of internal mold 2 girder lower ends is fallen on anti-rail wheel 3 on bracing frame 4;
8, with the 5t hoist engine, that internal mold 2 is whole dilatory to the beam body, fall on the anti-rail wheel 3 of storage area 5;
Whole knockout course only needs 4 workmans, just can all complete in 2 hours.
Should note following problem in above-mentioned steps:
1, before each operation cycle, check whether each limit switch reliable, whether haulage cable, pulley and hydraulic system pressure, liquid level normal, pulley, travelling wheel bearing block, lubricated whether good, confirm normal, can operation;
2, before the cast, reply concrete each several part size is carried out check measurement, guarantees can carry out pouring concrete after relative dimensions and flatness reach requirement;
When 3, traction traveling dolly template moved, observing at any time moving direction had accessiblely, prevents that chassis from jumping the road and pulling other plants;
4, the concrete setting time unsuitable oversize, intensity reach concrete design strength 60 ~ 70% the time need carry out the demoulding, otherwise can cause demoulding difficulty;
If 5, vertical shift traveling rail is in short supply, also can adopt the back-to-back welding of I-steel or channel-section steel all can.

Claims (2)

1. a box girder inner formwork vertical shift method, is characterized in that comprising the steps: to lift the box girder integral steel reinforcement cage to beam making bench, adjusts and checked steel reinforcement cage; Anti-rail wheel and bracing frame thereof longitudinally are installed on the case girder prefabricated pedestal successively, and are stretched out to lay through beam making bench two ends and install, to consist of the box girder inner formwork storage area outside beam making bench; Adopt the hoist engine traction to be in the box girder inner formwork of contraction state, described box girder inner formwork is dragged to beam making bench or dilatory to storage area by beam making bench along anti-rail wheel is whole by storage area, realize the vertical shift of box girder inner formwork, be provided with the track that coordinates with described anti-rail wheel on the contact-making surface of described box girder inner formwork girder downside and described anti-rail wheel.
2. a kind of box girder inner formwork vertical shift method according to claim 1, it is characterized in that: the described precast pedestal quantity that is provided with anti-rail wheel and bracing frame thereof in it is a plurality of, and longitudinal arrangement and anti-rail wheel and bracing frame transition connection thereof by described storage area.
CN 201110097867 2011-04-19 2011-04-19 Method for longitudinally moving box girder internal mold Active CN102225580B (en)

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Application Number Priority Date Filing Date Title
CN 201110097867 CN102225580B (en) 2011-04-19 2011-04-19 Method for longitudinally moving box girder internal mold

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CN102225580A CN102225580A (en) 2011-10-26
CN102225580B true CN102225580B (en) 2013-06-12

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Publication number Priority date Publication date Assignee Title
CN107160542B (en) * 2017-06-09 2019-05-10 中铁建大桥工程局集团第五工程有限公司 Bracket type inner form support system construction method
CN112757474A (en) * 2020-12-30 2021-05-07 湖南中铁五新钢模有限责任公司 Method for prefabricating hollow pier stud by integrally overturning inner mold, outer mold and reinforcement cage

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* Cited by examiner, † Cited by third party
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CN200991949Y (en) * 2007-04-09 2007-12-19 中铁大桥(郑州)工程机械有限公司 Box-beam internal mould

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