CN104878922A - Post-cast strip steel pipe top supporting system and construction method thereof - Google Patents
Post-cast strip steel pipe top supporting system and construction method thereof Download PDFInfo
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- CN104878922A CN104878922A CN201510243345.4A CN201510243345A CN104878922A CN 104878922 A CN104878922 A CN 104878922A CN 201510243345 A CN201510243345 A CN 201510243345A CN 104878922 A CN104878922 A CN 104878922A
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Abstract
The invention discloses a post-cast strip steel pipe top supporting system comprising a primary beam top supporting mechanism and a secondary beam top supporting mechanism that are independent from one another. The primary beam top supporting mechanism and the secondary beam top supporting mechanism are respectively and symmetrically arranged at a post-cast strip engineering node. From bottom to top, the top supporting mechanisms sequentially comprise pedestals, height adjusting sections, end standard sections, and top supports. The end standard sections are movably connected with the top supports, thereby the top supports can extend up and down with respect to the end standard sections, and a relative position between each top support and each end standard section can be fixed by a clamping component. By respectively arranging the primary beam top supporting mechanism and the secondary beam top supporting mechanism symmetrically below a primary beam and a secondary beam at the post-cast strip node, the space occupation ratio of the post-cast strip steel pipe top supporting system is low, and the clearance between supporting structures is increased, accordingly the personnel and the material can conveniently pass through the clearance during the construction process; meanwhile, by installing the movable top supports, the installation and the detachment of the top supporting mechanisms are more convenient.
Description
Technical field
The present invention relates to a kind of late poured band support technology, be specifically related to a kind of ater-casting steel pipe and return back to top support system and construction technology thereof.
Background technology
By the 2.0.10 article of " ater-casting: consider the factors such as variation of ambient temperature, concrete shrinkage, structure differential settlement; Jiang Liang, plate (comprising sole plate), wall are divided into some parts, the concrete belt with one fixed width of building again after certain hour of " concrete structure engineering job specfication " GB506666-2011." in concrete engineering, ater-casting is divided into temperature post-cast strip and pouring after settlement, the two is at concrete structure, all variant on off-period, to set on position with 1/3 region in the middle part of span of the beam and the plank as many, except stressed needs also considers dodging of base plate cushion cap specifically staying.
Temperature post-cast strip is arranged for clearing up concrete autogenous shrinkage stress, general spacing 30-40m, about the teeming time, has different versions in different specification, general with design drawing requirement for direct basis, the saying of " both sides agent structure complete after 28 days, 45 days, 60 days " all has.
Pouring after settlement is regulate excessive settlement difference between main tower and annex to arrange, surround main building structure surrounding to arrange, teeming time requirement is at " main building top out after ", different specification concrete lag time after binding, different designs institute require and inconsistent, and the saying of 28 days, 45 days, 60 days all has.
The existence of ater-casting makes whole across beam slab disconnection, and the cantilever construction of formation both sides, for avoiding the structural element being in cantilever position to be damaged, generally retaining support body and not tearing open before the concrete teeming of ater-casting, with such support body support self and each layer in top.
Because be whole across support body retain, on the one hand frame material take generation lease expenses for a long time; The occupy-place of support body makes the discrepancy of subsequent material transport be blocked on the other hand, very large in construction infection.
Attempt to some extent cracking in the restriction of late poured band support frame at present, such as original support for shuttering implements returning back to top of local prototype mould bases after removing, and return back to top only for cantilever beam slab end one fixed width scope, support body amount greatly reduces; Problem is that former support body is removed and new support body sets up to be connected improper in time more, and the component risk of damage of period is very large, and new support body still forms the obstruct in space, in walking inconvenience, and unfavorable construction.
Summary of the invention
In view of this, be necessary to provide a kind of stable support can be carried out and the low ater-casting steel pipe of space occupancy rate returns back to top support system and construction technology thereof.
A kind of ater-casting steel pipe returns back to top support system, comprise return back to top mechanism and secondary beam of the independent girder arranged to return back to top mechanism, described girder mechanism, the secondary beam mechanism that returns back to top that returns back to top is symmetricly set in engineering node place, ater-casting respectively, the described mechanism that returns back to top comprises base, Height Adjustment joint, termination standard knot and jacking from bottom to top successively, described termination standard knot is flexibly connected with between described jacking, enable described jacking opposite end head standard knot do upper and lower telescopic displacement, and fix the relative position between described jacking and described termination standard knot by a clamping part.
Ater-casting steel pipe returns back to top the construction technology of support system, comprises the following steps:
1) under the primary and secondary beam of ater-casting Nodes, arrange symmetrical master respectively to return back to top mechanism, the secondary mechanism that returns back to top;
2) by base, Height Adjustment joint and termination standard knot from bottom to top successively connect build;
3) by jacking movable set on the standard knot of termination, and adopt a clamping part to position clamping in maximum displacement place of described jacking relatively described termination standard knot.
Ater-casting of the present invention steel pipe returns back to top support system and construction technology thereof, by the master at ater-casting Nodes, arrange symmetrical master under secondary beam respectively to return back to top mechanism, the secondary mechanism that returns back to top, in replacement prior art, combined formwork is to the support that returns back to top of watering built module, because described master returns back to top mechanism, the secondary mechanism that returns back to top all independently is arranged, between do not connect support, therefore its space occupancy rate is low, make the steel pipe support system space occupancy rate that returns back to top in ater-casting low, space between supporting framework increases, in constructability process, personnel and material walks, mobilizable jacking is set simultaneously, the installation and removal of mechanism of making to return back to top are convenient.Ater-casting of the present invention steel pipe returns back to top support system structure simply, and construction technology safety, it is high that project completes efficiency.
Accompanying drawing explanation
Fig. 1 is that ater-casting of the present invention steel pipe returns back to top the structural representation of mechanism;
Fig. 2 is that ater-casting of the present invention steel pipe returns back to top the floor map of construction technology of support system;
Fig. 3 is a kind of structural representation of termination of the present invention standard knot and jacking;
Fig. 4 is the mounting structure schematic diagram of Fig. 3 middle-end head standard knot and jacking;
Fig. 5 is the another kind of structural representation of termination of the present invention standard knot and jacking;
Fig. 6 is the mounting structure schematic diagram of Fig. 5 middle-end head standard knot and jacking;
Fig. 7 is that ater-casting of the present invention steel pipe returns back to top the generalized section of construction technology of support system.
Detailed description of the invention
Clearly understand to make object of the present invention, technical scheme and advantage, below in conjunction with drawings and Examples, the present invention is further elaborated, is to be understood that, specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.
As depicted in figs. 1 and 2, the invention provides a kind of ater-casting steel pipe to return back to top support system, comprise return back to top mechanism 101 and secondary beam of the independent girder arranged to return back to top mechanism 102, described girder mechanism 101, the secondary beam mechanism 102 that returns back to top that returns back to top is symmetricly set in engineering node place, ater-casting respectively, to return back to top mechanism 102 by independently arranging return back to top mechanism 101 and secondary beam of girder, compare combined formwork of the prior art, not only simplify and build technique, also save taking up room of supporting framework, make the traffic between supporting framework more convenient.
The described mechanism 10 that returns back to top comprises base 11, Height Adjustment joint 12, termination standard knot 13 and jacking 14 from bottom to top successively, be fixedly connected with between described base 11, Height Adjustment joint 12 and termination standard knot 13, concrete, for make base 11, Height Adjustment save 12 and termination standard knot 13 can circulate collocation use, need to arrange unified linkage interface to each building block, be therefore all fixedly connected with by flange between described base 11, Height Adjustment joint 12 and termination standard knot 13.
Be flexibly connected between described termination standard knot 13 with described jacking 14, make described jacking 14 can do upper and lower telescopic displacement by opposite end head standard knot 13, and fix the relative position between described jacking 14 and described termination standard knot 13 by a clamping part 15.By arranging mobilizable jacking, the installation and removal of the mechanism that makes to return back to top are convenient.Concrete, as shown in Figure 3, the middle part of relatively described jacking 14 one end of described termination standard knot 13 caves inward a groove 131, and head standard knot 13 one end, described jacking 14 opposite end is movably set in described groove 131.Wherein, head standard knot 13 one end, described jacking 14 opposite end is provided with consistent reach through hole 141, as shown in Figure 4, described clamping part 15 is connected on the notch of described groove 131 through two ends after described through hole 141, restriction jacking 14 continues to occur to bottom offset under gravity, thus fixing relative position between described jacking 14 and described termination standard knot 13.Described clamping part 15 can select the latch commonly used.
For ensureing closely cooperating of jacking 14 and termination standard knot 13 further, as shown in Figure 5, cell wall near described groove 131 notch offers one group of symmetrical groove 132 coaxially run through with described through hole 141, as shown in Figure 6, described latch is simultaneously through described through hole 131 and groove 141, thus the relative position secured between described jacking 14 and described termination standard knot 13 two-way up and down.
Ater-casting steel pipe returns back to top the construction technology of support system, comprises the following steps:
Arrange symmetrical master for 120 times respectively at the girder 110 of ater-casting Nodes, secondary beam to return back to top mechanism 101, the secondary mechanism 102 that returns back to top;
Base 11, Height Adjustment joint 12 and termination standard knot 13 are connected from bottom to top successively and builds;
By jacking 14 movable set on termination standard knot 13, and a clamping part 15 is adopted to position clamping in maximum displacement place of described jacking 14 relatively described termination standard knot 13.
Concrete, the described mechanism 10 that returns back to top sets up just interim namely beginning at mould bases and builds, and remove follow-up continuation of insurance at formwork system and stay, thus avoid prior art Central Plains support body and to remove and new support body is set up and is connected improper, and the problem of transporting that blocks the traffic due to the obstruct in space.Simultaneously in order to make the uniform force of each mechanism 10 that returns back to top, in design early stage, should as far as possible by the Node configuration of ater-casting at the middle part of building plate length direction, be specifically as the criterion with the plan of working design institute.
With reference to Suzhou central plaza project, return back to top support system and construction method thereof of the ater-casting steel pipe described in the application is described further:
Suzhou central plaza project civil engineering over contract engineering two bid section (backlands block) is positioned at Suzhou Industrial Park, northern Lin Suxiulu, south to Su Huilu, from Xing Yangjie, to the east of Xing Gang street, east side is towards golden pheasant lakeside city square.The large size city synthesis that this project is office, business, hotel, apartment are integrated, with track traffic line for boundary, southern plot is a bid section, and backlands block is two bid sections, will become Suzhou CBD commercial centre, city new landmark after building up.
This Deep Foundation Pit monolayer area is 7.06 ten thousand m2, by three floor, local four floor basement, on the ground 3,4,5# tri-Super Highs and business podium form, overall floorage 530,000 square metres.3# building is 33 floor on the ground, high 160 meters; 4# building is 27 floor on the ground, high 132 meters; 5# building is 21 floor on the ground, high 107 meters.Podium is 3-6 layer on the ground, high 36 meters.
As shown in Figure 7, in this work items, adopt the mode that primary-secondary beam all returns back to top, symmetrical master is set for 120 times respectively at the girder 110 of ater-casting Nodes, secondary beam and returns back to top mechanism 101, the secondary mechanism 102 that returns back to top; Wherein, the load scope that the mechanism 10 that returns back to top of an arbitrary symmetry bears is as the cross shade filling part in Fig. 2, and namely the width of described load scope is the half of building module width, and length direction is equal with the length of watering built module.
1, Components Analysis calculates
The beam adopted in this project: 400x720mm; Plate: 120mm; Flooring working load: 2Kn/ ㎡.
(1), load collects
Only for the dead load of an individual layer computing unit:
Beam: 0.4x0.6x8.4=2.016m
3
Plate: 4.2x8.4x0.12=4.2336m
3
∑＝6.2496m
3
Gravity load Fg=6.2496x25Kn/m
3=156.24Kn
Only for the live load of an individual layer computing unit;
4.2x8.4x2Kn/㎡＝70.56Kn
Do not consider load combination factor, only cumulative can obtaining is carried out to dead load, live load;
156.24+70.56＝226.8Kn
(2) stress calculation analysis
As shown in Figure 7, the end counter-force that the mechanism 10 that returns back to top bears will be collected downwards layer by layer, and the load that the mechanism 10 that returns back to top of bottommost carries is maximum, therefore selects it as the object of checking computations.
If consider to calculate by 15 floors, total load is:
226.8Knx15＝3402KN
As shown above, one end freely-supported is fixed in one end, and simply supported end counter-force is 5F/16, therefore the part being transmitted to vertical rod in total load is:
3402x5/16＝1063.125Kn
This is the total amount that two mechanisms 10 that return back to top bear.
The load total amount estimated value that the single mechanism 10 that returns back to top bears is:
1063.125/2=531.5625Kn 550Kn. is got in follow-up accounting
(3), return back to top the Cross section calculation of mechanism
Mechanism 10 two ends that return back to top are hinged, its Calculation on Stability of Compressed Bar:
N represents longitudinal load; φ represents the coefficient of stability; A represents the cross sectional area of the mechanism that returns back to top; F represents the allowable stress of steel.Wherein N value 550Kn; F value 205N/mm
2.
Set up counting statistics table as follows:
2, the choosing of component
Return back to top the unified steel pipe adopting 219*6mm of material of mechanism 10, and build base 11, Height Adjustment joint 12, termination standard knot 13 and jacking 14 from bottom to top successively, wherein base 11 is fixed dimension, is highly 1500mm; Height Adjustment joint 12 has highly for 6 kinds of 100mm, 150mm, 200mm, 500mm, 1000mm, 1500mm highly selective; Termination standard knot 13 is positioned at the top of the whole mechanism 10 that returns back to top, and is connected with jacking 14, is highly 250mm; Jacking 14 is positioned at the topmost of the whole mechanism 10 that returns back to top, and is highly 450mm.
The mechanism 10 that returns back to top assembles according to floor height, and for the B1 floor in A-4 district in this project, floor height is 6.85m, both sides, ater-casting girder 110 is of a size of 400x700, secondary beam 120 is of a size of 250x600, and the lower headroom of girder 110 is 6150mm, and the lower headroom of secondary beam 120 is 6250mm.
It is highly 100mm Altitude control joint 12 for base 11, two height of 1500mm be 1500mm Altitude control joint 12, height are 1000mm Altitude control joint 12 and a height that its middle girder returns back to top that mechanism 101 selects, and is highly 250mm termination standard knot 13 and jacking 14.
The return back to top assembled component of mechanism of secondary beam is identical with the girder mechanism that returns back to top, it is selected is highly 200mm Altitude control joint 12 for base 11, two height of 1500mm be 1500mm Altitude control joint 12, height are 1000mm Altitude control joint 12 and a height, and is highly 250mm termination standard knot 13 and jacking 14.
3, component connects
(1) base 11 and Altitude control save 12, Altitude control saves between 12 and termination standard knot 13 with bolts, and bolt adopts the specification of M10, and length is not less than 40mm, respectively circumferentially on flange.
(2) termination standard knot 13 adopts latch to be connected with jacking 14, and latch is that 100mm is high, and width is 50mm.Jacking 14 is set in termination standard knot 13, and relies on the deadweight of jacking 14 to be fixed by latch.
4. build and remove
Remove successively according to order from the top down during dismounting.
(1) first taken off by latch, jacking 14 can due to the 100mm that drops downwards that conducts oneself with dignity.
(2) secondly termination standard knot 13 and Altitude control are saved 12 disassembling bolts be connected, just termination standard knot 13 and jacking 14 together can be removed.
(3) be also remove successively from the top down when Altitude control joint 12 is removed, must according to dismounting one group of bolt and the step of taking off component carry out.
(4) base 11 remove and Altitude control to save 12 method for dismounting consistent.
Ater-casting of the present invention steel pipe returns back to top support system and construction technology thereof, to return back to top mechanism, the secondary mechanism that returns back to top by arranging symmetrical master under the primary and secondary beam of ater-casting Nodes respectively, in replacement prior art, combined formwork is to the support that returns back to top of watering built module, because return back to top mechanism, the secondary mechanism that returns back to top of described master is all independently arranged, between do not connect support, make the steel pipe support system space occupancy rate that returns back to top in ater-casting low, space between supporting framework increases, the walking of personnel and material in constructability process, shortens the deadline of project greatly; Arrange mobilizable jacking, the installation and removal of the mechanism that makes to return back to top are convenient simultaneously.Ater-casting of the present invention steel pipe returns back to top support system structure simply, and construction technology safety, it is high that project completes efficiency.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. an ater-casting steel pipe returns back to top support system, it is characterized in that, comprise return back to top mechanism and secondary beam of the independent girder arranged to return back to top mechanism, described girder returns back to top mechanism, the secondary beam mechanism that returns back to top is symmetricly set in engineering node place, ater-casting respectively, the described mechanism that returns back to top comprises base from bottom to top successively, Height Adjustment saves, termination standard knot and jacking, described termination standard knot is flexibly connected with between described jacking, described jacking opposite end head standard knot is enable to do upper and lower telescopic displacement, and fix the relative position between described jacking and described termination standard knot by a clamping part.
2. ater-casting according to claim 1 steel pipe returns back to top support system, it is characterized in that, the middle part of the relatively described jacking one end of described termination standard knot caves inward a groove, and standard knot one end, described jacking relatively described termination is movably set in described groove.
3. ater-casting according to claim 2 steel pipe returns back to top support system, and it is characterized in that, standard knot one end, described jacking relatively described termination is provided with consistent reach through hole, and described clamping part is connected on the notch of described groove through two ends after described through hole.
4. ater-casting according to claim 2 steel pipe returns back to top support system, it is characterized in that, standard knot one end, described jacking relatively described termination is provided with consistent reach through hole, described termination standard knot is provided with one group of symmetrical groove near the cell wall of described groove notch, described symmetrical groove and described through hole coaxially run through, and described clamping part is arranged through described through hole and groove simultaneously.
5. ater-casting according to claim 1 steel pipe returns back to top support system, it is characterized in that, is all fixedly connected with by flange between described base, Height Adjustment joint and termination standard knot.
6. ater-casting steel pipe returns back to top a construction technology for support system, it is characterized in that, comprises the following steps:
1) under the primary and secondary beam of ater-casting Nodes, arrange symmetrical master respectively to return back to top mechanism, the secondary mechanism that returns back to top;
2) by base, Height Adjustment joint and termination standard knot from bottom to top successively connect build;
3) by jacking movable set on the standard knot of termination, and adopt a clamping part to position clamping in maximum displacement place of described jacking relatively described termination standard knot.
7. ater-casting according to claim 6 steel pipe returns back to top the construction technology of support system, it is characterized in that, described in the mechanism that returns back to top set up just interim namely beginning at mould bases and build, and remove follow-up continuation of insurance at formwork system and stay, replace mould bases to play supporting role.
8. ater-casting according to claim 6 steel pipe returns back to top the construction technology of support system, and it is characterized in that, the node of described ater-casting is positioned at the middle part of building plate length direction.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510243345.4A CN104878922A (en) | 2015-05-13 | 2015-05-13 | Post-cast strip steel pipe top supporting system and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510243345.4A CN104878922A (en) | 2015-05-13 | 2015-05-13 | Post-cast strip steel pipe top supporting system and construction method thereof |
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| CN104878922A true CN104878922A (en) | 2015-09-02 |
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| CN201510243345.4A Pending CN104878922A (en) | 2015-05-13 | 2015-05-13 | Post-cast strip steel pipe top supporting system and construction method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109457952A (en) * | 2018-11-20 | 2019-03-12 | 中建四局第六建筑工程有限公司 | A kind of return back to top ruggedized construction and its construction method for post-cast strip cantilever |
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| CN201424810Y (en) * | 2009-04-17 | 2010-03-17 | 新七建设集团有限公司 | Supporting head of concrete molding board |
| CN203080705U (en) * | 2013-01-10 | 2013-07-24 | 浙江建设职业技术学院 | Concrete post-cast strip supporting top |
| CN204152200U (en) * | 2014-08-29 | 2015-02-11 | 中国建筑第八工程局有限公司 | Adjustable support structure |
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- 2015-05-13 CN CN201510243345.4A patent/CN104878922A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR100367519B1 (en) * | 2000-01-13 | 2003-01-15 | 현대산업개발 주식회사 | measuring type Jack support |
| CN201424810Y (en) * | 2009-04-17 | 2010-03-17 | 新七建设集团有限公司 | Supporting head of concrete molding board |
| CN101575890A (en) * | 2009-06-05 | 2009-11-11 | 中建三局第二建设工程有限责任公司 | Girder and profiled steel sheet concrete combined floor construction method without support of hack lever |
| CN203080705U (en) * | 2013-01-10 | 2013-07-24 | 浙江建设职业技术学院 | Concrete post-cast strip supporting top |
| CN204152200U (en) * | 2014-08-29 | 2015-02-11 | 中国建筑第八工程局有限公司 | Adjustable support structure |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109457952A (en) * | 2018-11-20 | 2019-03-12 | 中建四局第六建筑工程有限公司 | A kind of return back to top ruggedized construction and its construction method for post-cast strip cantilever |
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Application publication date: 20150902 |
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