CN101886468B - Construction method of suspension type template support in high-position conjoined structure - Google Patents

Construction method of suspension type template support in high-position conjoined structure Download PDF

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Publication number
CN101886468B
CN101886468B CN2010101348150A CN201010134815A CN101886468B CN 101886468 B CN101886468 B CN 101886468B CN 2010101348150 A CN2010101348150 A CN 2010101348150A CN 201010134815 A CN201010134815 A CN 201010134815A CN 101886468 B CN101886468 B CN 101886468B
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China
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steel
construction
conversion layer
support
girder
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CN2010101348150A
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Chinese (zh)
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CN101886468A (en
Inventor
仓恒芳
刘亚非
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南京大地建设集团有限责任公司
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Abstract

The invention relates to a construction method of a suspension type template support in high-position conjoined structure. The construction method comprises the working procedures of installing a tank type steel hanging post, installing steel beams and profiled steel plates, welding shearing-resistance studs, bonding reinforcing bar nets and pouring floor bearing plate concrete to accomplish the construction of the suspension type template support in the high-position conjoined structure. The invention overcomes the defects of large use level of support materials, long mounting and demounting construction period, high reinforcing expense, high construction cost, large dead weight, large construction difficulty and the like existing in the traditional method of bearing full supports and erecting high-altitude heavy operation platforms. The invention sufficiently utilizes the bearing capacity of a conversion-floor steel girder so that the combined floorslab in the conversion floor is used as an operation platform for erecting the template support in the construction stage and is used as a permanent refuge floor of an ultrahigh-rise building in the usage stage, thereby ensuring the safety of high-altitude work, saving the construction expense and increasing the use area. The steel girders are used as stiff reinforcing bars in the work of steel skeleton concrete conjoined structure to together bear the structural dead weight and the construction load which are gradually increased in each layer of the upper part of the steel girder.

Description

Construction method of suspension type template support in high-position conjoined structure
Technical field
The present invention relates to high-position conjoined structure in a kind of highrise building, particularly a kind of construction method of suspension type template support in high-position conjoined structure.
Background technology
The building that aerial vestibule or conjoined structure are set between the double tower building of high-storey business and office building is more and more, whether the high-altitude disjunctor concrete structure conversion layer formwork bracing system construction technology for these buildings is reasonable, to directly affect safety, quality, duration and the construction cost of engineering, selecting correct shutterings-supported construction technology is the key of this conversion layer structure construction.Before the present invention, shutterings-supported construction technology has:
The one, adopt the full hall of traditional load-bearing bracing frame.Take measures after the reinforcing of podium roofing, the full hall formula formwork-support of the about 100m of scaffolding height on roofing, support body is guaranteed stable and is carried out effective drawknot with high building, makes it satisfy the construction requirement of conjoined structure.This scheme is comparatively safe but the backing material consumption is big, take tear open long in time limit, reinforcing expense height, construction cost is big.
The 2nd, set up high-altitude heavy duty operations platform.When two high building main body concrete structure constructions, default embedded part below conjoined structure conversion layer design elevation after this position concrete reaches design strength, utilizes embedded part welding fixed steel support.Six or four formula railway military beams are installed on the shaped steel bearing are formed the heavy construction operating platform, set up the conjoined structure formwork-support again.This construction technology is safe and reliable, but operating platform is from great temporarily, and its cost of making, lease, install and removing is also big, and has certain difficulty of construction.
Because this job practices or technology all are provisional, for the conjoined structure of constructing between two high buildings is provided with, be to need to remove after construction finishes, so engineering time and cost, the time of dismounting and cost and difficulty all are to consider.Obviously, above-mentioned two kinds of job practicess are all undesirable.
Summary of the invention
Purpose of the present invention just is to overcome above-mentioned defective, develops a kind of construction method of suspension type template support in high-position conjoined structure.
Technical scheme of the present invention is:
Construction method of suspension type template support in high-position conjoined structure, its major technique step is:
(1) conversion layer steel girder is installed
The disjunctor conversion layer is a steel reinforced concrete structure, two high buildings have all been reserved the steel corbel that is connected with conjoined structure during main body construction, utilize the steel corbel of relevant position, conversion layer upper end to hang tackle pulley, the method that lifts with two-shipper is promoted to design attitude and correction in time and welding with the steel girder by root, and all the other steel secondary beams are installed with tower crane;
(2) hang the refuge story structure construction
Utilize tower crane that steel davit and the steel work floor support plate that hangs refuge story is installed, its working procedure is:
Install bin shaped steel davit → installation girder steel → profiled sheet → welding shearing resistance peg → assembling reinforcement net sheet → build floor support plate concrete;
(3) on refuge story, set up support for shuttering
On the suspension floor support plate, set up support for shuttering, supporting conversion layer slab form, support for shuttering gate-type frame, also available bowl button frame and fastener, steel pipe are set up, and support for shuttering and two ends high building agent structure are carried out and are effectively socketed;
(4) conversion layer girder, secondary beam self-supporting template are installed
1) at the stiffening rib place welded reinforcement of steel girder web both sides as reinforcing pull rod, when deck-siding is 800mm, the reinforcing bar of a pair of Φ 18 is set, when deck-siding is 800~1200mm, two pairs of Φ 20 reinforcing bars are set;
2) it is stupefied in the reinforcing pull rod lower end channel-section steel horizontal stroke to be set, and regulate with straight screw sleeve and fix, the horizontal stupefied mounting rail soffit formwork of going up of channel-section steel, the deadweight of concrete conversion beam and whole working load upwards pass to the steel girder by reinforcing pull rod;
3) in girder, secondary beam both sides side form, back cord and split bolt are installed;
(5) conversion layer beam reinforced steel bar colligation, presstressed reinforcing steel are installed
Concrete conversion beam longitudinal stress reinforcing bar Φ 32 and the interlaced layout of steel column, to passing the longitudinal reinforcement of steel column, location drilling on the steel column web in advance, diameter steel bar adopts the sleeve cold-extrusion technology to connect; The conversion layer floor bar is the double-layer double-direction configuration, and Non-cohesive Prestressing Force Technology has been adopted in the floor design;
(6) remove conversion layer template and support for shuttering.
Advantage of the present invention and effect are to make full use of the supporting capacity of conversion layer steel girder self.Conversion layer steel girder is designed to welded H section steel, and the high 2600mm in cross section has sizable supporting capacity through checking, and can utilize its suspension operational platform and the template system of self fully.Design, construction and unit in charge of construction think and can hang one deck steel work composite floor under conversion layer steel girders through repeatedly research.This layer composite floor set up formwork-support in the construction stage as operating platform, at the permanent refuge story of operational phase as super highrise building, both guaranteed work high above the ground safety, saved operating expenses, increased usable floor area for the owner again.
Adopt the stiffness arrangement of reinforcement of welded H section steel, and under conversion layer, hang the operating platform (Fig. 1) of one deck steel work floor support plate as the construction stage as concrete conjoined structure conversion layer girder, secondary beam.Make full use of the enough big supporting capacity of H shaped steel girder self,, independently bear working load such as disjunctor conversion layer self-supporting template and dead load, the following steel work refuge story deadweight of hanging of beam and floor slab formerecting frame in the disjunctor conversion layer construction stage; In the disjunctor conversion layer superstructure construction stage, this steel girder participates in the work of steel reinforced concrete conjoined structure as the stiffness arrangement of reinforcement, bears dead load and working load that its each layer of top increases gradually jointly.
Description of drawings
Fig. 1--principle of the invention structural representation.
Fig. 2--set up among the present invention at the support for shuttering structural representation that hangs on the refuge story.
The specific embodiment
As shown in Figure 1 and Figure 2:
Steel reinforced concrete disjunctor conversion layer suspended formwork support system is made up of two parts:
1) steel reinforced concrete disjunctor conversion beam 3 (being made of steel girder 1 and concrete) adopts self-supporting template (being made of steel girder 1, reinforcing pull rod 5, channel-section steel 9 and straight screw sleeve 10), and its concrete, reinforcing bar and template weight and construction mobile load are passed to steel girder 1 by many to equally distributed reinforcing pull rod 5;
2) conversion layer concrete floor 4 adopts conventional floor slab formerecting frame 6, is born every load of floor slab formerecting frame 6 by the steel work refuge story 7 of several steel davits 2 suspensions by the conversion layer bottom.
1, forms the disjunctor load-carrying construction by the suspension steel work refuge story 7 of steel reinforced concrete disjunctor conversion layer and its below.Hang steel work floor support plate 8 the construction stage as interim operating platform, as the highrise building refuge story, perfect function of use has increased building area in operational phase; H shaped steel girder 1 hangs steel work refuge story 7 as permanent structure as disjunctor conversion layer structure stiffness arrangement of reinforcement, does not increase the structural steel amount, has reduced engineering cost;
2, by steel reinforced concrete disjunctor conversion beam 3 self-supporting templates with set up at the floor slab formerecting frame 6 that hangs on the steel work refuge story 7, form the suspended formwork support system, bear whole loads of conjoined structure construction stage jointly, need not to set up and land the superelevation support for shuttering, need not to install the heavy one-shot job platform in high-altitude, need not large-scale hoisting machinery equipment, reduce a large amount of circulation materials, artificial and plant equipment input, alleviate labor strength, accelerating construction progress, technical economic benefit is remarkable;
3, the self-supporting template is by being welded on the reinforcing pull rod 5 of steel girder 1 web, conversion beam 3 templates (comprising reinforcing bar, concrete deadweight and working load) are upwards passed to steel girder 1, make full use of the enough big supporting capacity of steel girder 1 and bear the conjoined structure own wt;
4, set up conversion layer floor slab formerecting frame 6 on suspension steel work refuge story 7, refuge story 7 dead loads and whole working load upwards are passed to steel girder 1 by steel davit 2, and power transmission is clear and definite, and technology is reasonable, easy construction; Steel work refuge story 7 is suspended on disjunctor conversion layer below, forms the work high above the ground protective barrier of conjoined structure construction stage.
Performance analysis
1, suspended formwork support system operating expenses and Analysis of Time-limit
Set up conversion layer floor slab formerecting frame 6 on suspension steel work floor support plate 8, floor height 4.8m sets up area 570m 2, about 50,000 yuan of required portal support lease, mounting or dismounting expense; About 100,000 yuan of materials such as the required reinforcing pull rod 5 of conversion beam 3 self-supporting templates, channel-section steel 9, straight screw sleeve 10 and labour cost; 150,000 yuan of total expenses.1 month construction period.
2, hall supporting frame construction expense and Analysis of Time-limit are expired in traditional load-bearing
Be to adopt to set up full hall bracing frame at the podium roofing and carry out the conversion layer structure construction in the prior art, need take measures to reinforce the podium roofing, then the about 100m of scaffolding height, area 570m on roofing 2, the about 4000t of weight the full hall of a load-bearing support for shuttering, the backing material consumption is big, take tear open long in time limit, reinforcing expense height, construction cost is big.Considered by 4 months construction periods, need to drop into about 270.74 ten thousand yuan of general expenses.
3, economic and social benefit
Adopt this construction technology to save ten thousand yuan of operating expenses 270.74-15=255.74.The project subject structure bound approximately in advance in 3 months.
As the suspension steel work floor support plate 8 of construction stage operating platform, construction finishes to need not to remove, and operational phase is as building refuge story 7, for the owner increases 570m 2Building area.
4, environmental benefit
Adopt the present invention to save turnover materials such as super amount steel pipe and fastener; avoid the stacking of on-the-spot circulation material to take the construction land tenure situation, reduced the construction noise pollution, reduced the influence of construction activities surrounding enviroment; help environmental protection, site operation is civilization more.

Claims (1)

1. construction method of suspension type template support in high-position conjoined structure, its step is:
(1) conversion layer steel girder is installed
The disjunctor conversion layer is a steel reinforced concrete structure, two high buildings have all been reserved the steel corbel that is connected with conjoined structure during main body construction, utilize the steel corbel of relevant position, conversion layer upper end to hang tackle pulley, the method that lifts with two-shipper is promoted to design attitude and correction in time and welding with the steel girder by root, and all the other steel secondary beams are installed with tower crane;
(2) hang the refuge story structure construction
Utilize tower crane that steel davit and the steel work floor support plate that hangs refuge story is installed, its working procedure is:
Install bin shaped steel davit → installation girder steel → profiled sheet → welding shearing resistance peg → assembling reinforcement net sheet → build floor support plate concrete;
(3) on refuge story, set up support for shuttering
On the suspension floor support plate, set up support for shuttering, supporting conversion layer slab form, support for shuttering gate-type frame, also available bowl button frame and fastener, steel pipe are set up, and support for shuttering and two ends high building agent structure are carried out and are effectively socketed;
(4) conversion layer girder, secondary beam self-supporting template are installed
1) at the stiffening rib place welded reinforcement of steel girder web both sides as reinforcing pull rod, when deck-siding is 800mm, the reinforcing bar of a pair of Φ 18 is set, when deck-siding greater than 800 during smaller or equal to 1200mm, two pairs of Φ 20 reinforcing bars are set;
2) it is stupefied in the reinforcing pull rod lower end channel-section steel horizontal stroke to be set, and regulate with straight screw sleeve and fix, the horizontal stupefied mounting rail soffit formwork of going up of channel-section steel, the deadweight of concrete conversion beam and whole working load upwards pass to the steel girder by reinforcing pull rod;
3) in girder, secondary beam both sides side form, back cord and split bolt are installed;
(5) conversion layer beam reinforced steel bar colligation, presstressed reinforcing steel are installed
Concrete conversion beam longitudinal stress reinforcing bar Φ 32 and the interlaced layout of steel column, to passing the longitudinal reinforcement of steel column, location drilling on the steel column web in advance, diameter steel bar adopts the sleeve cold-extrusion technology to connect; The conversion layer floor bar is the double-layer double-direction configuration, and Non-cohesive Prestressing Force Technology has been adopted in the floor design;
(6) remove conversion layer template and support for shuttering.
CN2010101348150A 2010-03-29 2010-03-29 Construction method of suspension type template support in high-position conjoined structure CN101886468B (en)

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CN108775071A (en) * 2018-06-29 2018-11-09 聂超 A kind of construction method of prestressed suspension type building structure

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CN102337784B (en) * 2011-07-13 2013-07-10 葛加君 Method for constructing reinforced concrete frame of tall curved tower
CN102400506A (en) * 2011-09-22 2012-04-04 姚攀峰 Template-free energy consumption steel plate shear wall and construction method thereof
CN102505635B (en) * 2011-10-18 2014-01-15 中铁大桥局股份有限公司 Cast-in-situ formwork for bridge construction
CN102392536B (en) * 2011-10-28 2013-05-01 山东万鑫建设有限公司 Construction method for long-span hanging vestibule type template support system
CN102767282B (en) * 2012-08-08 2014-10-29 龙信建设集团有限公司 Assembly-type high-formwork construction method for cantilever of oversized special-shaped conversion layer
CN103046743B (en) * 2012-12-04 2016-05-25 中建三局建设工程股份有限公司 A kind of Super High conversion layer steel reinforced concrete crossbeam suspension type form bracing system and construction method
CN103452326B (en) * 2013-07-25 2015-08-05 浙江精工钢结构集团有限公司 Overlength davit is along way construction method and equipment thereof
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CN105019556A (en) * 2015-07-24 2015-11-04 安徽富煌钢构股份有限公司 Lap-joint structure assisting quick hoisting of high-rise steel beam, and application of lap-joint structure
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