CN202214968U - Overhanging scaffold erection structure - Google Patents

Overhanging scaffold erection structure Download PDF

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Publication number
CN202214968U
CN202214968U CN2011202942983U CN201120294298U CN202214968U CN 202214968 U CN202214968 U CN 202214968U CN 2011202942983 U CN2011202942983 U CN 2011202942983U CN 201120294298 U CN201120294298 U CN 201120294298U CN 202214968 U CN202214968 U CN 202214968U
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CN
China
Prior art keywords
floor
builder
jack
suspension ring
bar
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Expired - Lifetime
Application number
CN2011202942983U
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Chinese (zh)
Inventor
刘佳
彭传科
黄�良
徐思明
高照林
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Chengdu No6 Construction Engineering Co
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Chengdu No6 Construction Engineering Co
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Priority to CN2011202942983U priority Critical patent/CN202214968U/en
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Publication of CN202214968U publication Critical patent/CN202214968U/en
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Abstract

The utility model discloses an overhanging scaffold erection structure, which is safe, reliable and stable in scaffold body. The overhanging scaffold erection structure mainly comprises a fixed type steel girder, a bridging, and longitudinal and transverse bottom transoms. The outer-wall overhanging scaffold body is provided with an I-steel ram and embedded with front and rear steel bar suspension rings. The front and rear steel bar suspension rings are consistent in direction. Gaps at the upper, left and right surfaces of the front and rear suspension rings in contact with the I-steel are tightly wedged through timber wedges. The suspension rings are anchored into a floor at the depth of 30d and are pressed under steel bars at the lower layer of the floor. Meanwhile, suspension hooks are placed under the bottom ribs of a cast-in-situ concrete slab.

Description

Builder's jack is set up structure
Technical field
The utility model is the structure of setting up about the exterior wall builder's jack.
Background technology
Along with highrise building is constantly rised sheer from level ground.In process of construction, the use of exterior wall builder's jack is also more and more frequent.With respect to the console mode steel pipe scaffold, overhanging scaffold has advantages such as input is low, turnover is fast, saving cycle.Whether the builder's jack constructure scheme is complete, reasonable, reliable, whether can the accurate instruction constructor make, install, set up builder's jack, and be one of key factor of guaranteeing support body safety.In practice of construction, there is the designing and calculating principle insufficient recognition to the exterior wall builder's jack in part execution control personnel, to managing problems such as not in place in the scaffold construction.
The main foundation of builder's jack constructure scheme establishment at present is the JGJ130-2001 standard; This standard does not have the regulation of limit for height to builder's jack, and the way of various places is not quite similar, general height and the parameters of rule of thumb tentatively drafting earlier every section builder's jack; Adjust the mechanical property of external scaffolding itself again; As can not adjust parameter more one by one through checking computations, continue checking computations and require all to satisfy until each items such as intensity, rigidity, stability, node strengths.For highrise building, wind load is important horizontal loading, is to make structure produce the important water hole element of internal force and displacement.No exception for external scaffolding, along with the increase of height, the effect meeting of wind load increases gradually.In the stable checking computations of vertical rod, for the bigger area of wind reference pressure, there is wind to be combined as control combination, when segmentation was encorbelmented, a last step encorbelmented and highly just can guarantee to move the stability of bar less than next step.At the external corner place of building, length is not the longest though section steel beam is encorbelmented, and is the joint of both sides vertical rod here, and its load that bears is maximum, and is difficult for fixing.But a lot of programming personnel have ignored the calculating here, still are provided with by the general position, cause certain potential safety hazard.
We find the residential building of equal height in the builder's jack construction; Different units in charge of construction encorbelment at sustained height; It is highly identical to encorbelment, and adopts all that common i iron is encorbelmented, the wire rope inclined-pulling mode, and the i iron specification of employing is different; I14, I16, I18 are arranged, and I22a is adopted at indivedual balcony positions.Differing so big, trace it to its cause, is whether each unit in charge of construction considers the stressed appearance that understands differently to wire rope.
Builder's jack is divided into diagonal-bracing type, cantilevered, cable-stayed type by its stressed pattern, and using maximum at present is the cable-stayed type frame of encorbelmenting, and promptly common shaped steel is encorbelmented, wire rope inclined-pulling.And whether wire rope is stressed, directly has influence on stress model, also directly has influence on the selection of section steel beam.If wire rope is by stressed consideration, then the mechanical model of section steel beam is freely supported structure (the front end anchor point is not considered stressed).If do not consider that wire rope is stressed.Only as a kind of safety stock, then the mechanical model of section steel beam is a cantilevered structure.Most expertises are that wire rope is as flexible material; Bear the how much difficult definite of load; Should confirm the specification of shaped steel and steel seam rope during calculating by following two kinds of situation jointly: 1. be that section steel beam is stressed fully; Wire rope is not considered stressed, only as a kind of safety stock, presses the supporting capacity that cantilevered structure is adjusted shaped steel.Thereby selection section steel: the 2nd, wire rope is stressed fully, as ultimate load, presses the supporting capacity that freely supported structure is adjusted wire rope with the rupture pull force of wire rope, thereby selects steel seam rope.But the specialty of the scaffold personnel that set up think that then wire rope can be stressed. and most of load of scaffold born by wire rope, and computation model is considered not conform to reality by cantilevered structure.The cable-stayed type builder's jack set up with use in, though wire rope is stressed, the tensioning degree and inconsistent of respectively restricting explain not of uniform size kind that respectively restricts stressed.If press freely supported structure as computation model, as ultimate load, the shaped steel of selecting like this is less than normal with the rupture pull force of wire rope; If calculate but press cantilevered structure fully, the shaped steel of selection is then very big, has caused very big waste.Tai Gao or section steel beam are encorbelmented oversizely if external scaffolding is encorbelmented, and this load has surpassed the supporting capacity of the supporting member of section steel beam, will cause the damage or the destruction of member, the unstability that will cause outrigger with collapse.
Summary of the invention
The purpose of the utility model is the weak point to prior art, provides a kind of safe and reliable, and the stable builder's jack of support body is set up structure.
The utility model solves the technical scheme that its technical problem adopted: a kind of builder's jack is set up structure; Comprise; The bridging of fixed girder steel and setting, and the vertical and horizontal bar of sweeping the floor is characterized in that; Exterior wall builder's jack body is provided with the i iron rod, buries the consistent front and back ends reinforcing bar suspension ring of direction before and after the scaffold body is embedded with underground; The front and back ends suspension ring contact with i iron goes up, the timber wedge wedging is all used in left and right three gaps, and suspension ring anchor into floor 30d, and is pressed in below the floor lower floor reinforcing bar, and suspension hook places at the bottom of the cast-in-place plate under the muscle.
The utlity model has following beneficial effect.
The utility model is provided with bridging, the vertical and horizontal bar of sweeping the floor by code requirement, can limit the lateral deformation of scaffold well, the effect of playing and guarantee the scaffold lateral stability, strengthening the scaffold globality.The utility model is provided with horizontal diagonal brace between the rod girder steel, guaranteed the stability of horizontal direction, can effectively prevent the big and typhoon region side direction unstability at wind reference pressure.Bury front and back ends reinforcing bar suspension ring underground at the scaffold body, can guarantee that suspension ring can not extract from concrete floor.Support body is stable, and is safe and reliable.
Description of drawings
Fig. 1 is the generalized section that the utility model builder's jack is set up structure.
Fig. 2 is the positive elevational schematic view that the utility model builder's jack is set up structure.
Fig. 3 is that the shaped steel suspension ring are buried the full-page proof sketch map underground among Fig. 1.
Fig. 4 is the shaped steel section of choosing a full-page proof sketch map among Fig. 1.
Among the figure: 1. i iron, the 2. word diagonal brace of level, the little cross bar of 3. sweeping the floor, 4. sweep the floor leger, 5. railing; 6. leger, 7. little cross bar, 8. bridging, 9. bamboo basketry plate, 10. wall-connecting piece; 11. close order safety net, 12. horizontal container made of bamboo, wicker, ratten, etc. nets, 13. totally-enclosed bottom frame plates, 14. front end suspension ring; 15. the rear end suspension ring, 16. Φ, 16 reinforcing bar suspension columns, 17. suspension ring additional bars, 18. vertical rods.
The specific embodiment
Consult Fig. 1-Fig. 4.Builder's jack described in the figure is set up structure and is mainly comprised, the bridging of fixed girder steel and setting, the vertical and horizontal bar of sweeping the floor, double support body.Rod adopts 16A i shaped steel 1, spacing 1500mm.Steel I-beam adopts Φ 16 reinforcing bar front and back ends suspension ring 14,15 fixing.Front end suspension ring 14 are imbedded in the side bar, and rear end suspension ring 15 anchor in the floor, anchor into length 30d; Anchor into the suspension ring flat segments and place plate muscle bottom, and increase suspension ring additional bar 17, firm with the colligation of plate muscle; To guarantee that suspension ring are not transferred to, the i iron rear end is apart from rear end suspension ring 150~200mm.The timber wedge wedging is all used in last, left and right three gaps that suspension ring contact with i iron, prevents the i iron rollover.All frame pipes all adopt ф 48 * 3.5mm steel pipe to set up.Scaffolding height is no more than 18000mm, vertical rod 18 transfer 800mm, advance 1500mm, step pitch 1800mm.I shaped steel 1 total length 4500mm chooses segment length 1000mm, built-in length 3500mm.Steel I-beam 1 upper pright stanchion relevant position welding Φ 16 reinforcing bars 16, to stablize the builder's jack vertical rod, vertical rod is apart from metope 200mm in the builder's jack.Sweep the floor little cross bar 3 on the leger 4 of sweeping the floor, be close to the word diagonal brace 2 that the leger of sweeping the floor is provided with level for 4 times, completely spread frame plate 13 on the little cross bar 3 of sweeping the floor, and form totally-enclosed shape, guarantee that material can not fall through gap at the bottom of the frame with the flooring facade.Little cross bar is arranged under the leger, at a distance from the step bamboo basketry plate 9 hard protections is set one, and horizontal container made of bamboo, wicker, ratten, etc. net 12 is set in the middle of bamboo basketry plate 9 hard protections, railing is set in the middle of each step support body 5 one.10 liang of steps three of wall-connecting piece stride and are provided with together, and bridging 8 is arranged at support body corner and end, width 3~4 is set strides, and spacing≤15000mm is set.The outer facade of support body is completely hung close order safety net 11.For the scaffold of selecting channel-section steel as the shaped steel bearing support, notice then preventing that vertical rod from placing eccentric and the outer unstability in plane that cause, can be at the inboard welding steel of channel-section steel as ribs, rigidity outside the plane of reinforcement channel-section steel.
The scaffold body is embedded with front and back ends reinforcing bar suspension ring, and rear end suspension ring 3 anchor into floor 30d, and is pressed in below the floor lower floor reinforcing bar.It is 30d=480mm that rear end suspension ring 3 anchor into concrete length, width=120mm.Suspension ring adopt ф 16 reinforcing bars.Suspension hook places at the bottom of the cast-in-place plate under the muscle.Front and back ends reinforcing bar suspension ring 2,3 front and back are buried the direction unanimity underground.
Φ 16 reinforcing bars as shown in Figure 3 are welded in the shaped steel front end, stablize the steel pipe vertical rod.2 pairs of anchorage lengths of front end suspension ring do not have specific (special) requirements, only suspension hook are placed at the bottom of the cast-in-place plate to get final product under the muscle.The height of pre-buried suspension ring should strict control when building concrete, exceeds in the 180~200mm of concrete surface, big space is arranged after avoiding i shaped steel 1 to be inserted in, and influences the stability of whole builder's jack.For anti-worker's i shaped steel 1 breaks away and topples, on the front and back ends suspension ring 2,3, left and right three with timber wedge wedge jail.Concrete structure fixing can adopt that pre-embedded bolt is fixed, the anchoring of reinforcing bar suspension ring, must not adopt fastener to connect, and bonding strength should be definite through calculating.As can not guarantee coagulation ten protective layer thickness of reinforcing bar; Also can suspension ring be pressed in above the floor lower floor reinforcing bar; The reinforcing bar of each additional two diameter 14~16 in both sides, suspension ring top simultaneously, and firm with the floor bar colligation guarantees that draw ring can not extract from concrete floor.Or change wall-connecting piece 7 into two fasteners that spacing is encrypted.
Wall-connecting piece 7 is near the host node setting, and the distance that departs from host node is less than 300mm.Stride or two steps two strode wall-connecting piece 7 is set by two steps three.The step pitch of scaffold is generally 1.5m~1.8m. and implements away for ease, adopts 1.8m usually.Weldering ф 16 reinforcing bars on i shaped steel 1, long 60mm stabilizes to the vertical rod sleeve pipe.Amount of deflection must be controlled by other beam allowable deflection in the Code for design of steel structures ; Promptly can not carry the use outrigger by fullcharging in the construction, the corner amount of deflection is controlled at 4.72mm.
In addition, for preventing the side direction unstability, the word diagonal brace 6 of level can be set in the bar position of sweeping the floor on i shaped steel 1 rod girder steel top.

Claims (8)

1. a builder's jack is set up structure, comprises the bridging of fixed girder steel and setting; And the vertical and horizontal bar of sweeping the floor; It is characterized in that exterior wall builder's jack body is provided with the i iron rod, bury the consistent front and back ends reinforcing bar suspension ring of direction before and after the scaffold body is embedded with underground; The front and back ends suspension ring contact with i iron goes up, the timber wedge wedging is all used in left and right three gaps, and suspension ring anchor into floor 30d, and is pressed in below the floor lower floor reinforcing bar, and suspension hook places at the bottom of the cast-in-place plate under the muscle.
2. builder's jack as claimed in claim 1 is set up structure, it is characterized in that, said rod is No. 16 i iron.
3. builder's jack as claimed in claim 1 is set up structure, it is characterized in that, it is 30d=480mm that the front and back ends suspension ring anchor into concrete length, width=120mm.
4. builder's jack as claimed in claim 1 is set up structure, it is characterized in that, the height of pre-buried suspension ring exceeds builds in the 180~200mm of concrete surface.
5. builder's jack as claimed in claim 1 is set up structure, it is characterized in that, and the reinforcing bar of each additional two diameter 14mm~16mm in both sides, suspension ring top, and firm with the floor bar colligation.
6. builder's jack as claimed in claim 1 is set up structure, it is characterized in that, wall-connecting piece is near the host node setting, and the distance that departs from host node is less than 300mm.
7. builder's jack as claimed in claim 1 is set up structure; It is characterized in that, sweep the floor little cross bar 3 on the leger of sweeping the floor (4), be close to the word diagonal brace (2) of the level that is provided with under the leger of sweeping the floor (4); Sweep the floor and completely spread frame plate (13) on the little cross bar (3), and form totally-enclosed shape with the flooring facade.
8. builder's jack as claimed in claim 1 is set up structure; It is characterized in that little cross bar is arranged under the leger, one bamboo basketry plate (9) hard protection is set at a distance from the step; Horizontal container made of bamboo, wicker, ratten, etc. net (12) is set in the middle of bamboo basketry plate (9) hard protection, railing (5) is set together in the middle of each step support body.
CN2011202942983U 2011-08-15 2011-08-15 Overhanging scaffold erection structure Expired - Lifetime CN202214968U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011202942983U CN202214968U (en) 2011-08-15 2011-08-15 Overhanging scaffold erection structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011202942983U CN202214968U (en) 2011-08-15 2011-08-15 Overhanging scaffold erection structure

Publications (1)

Publication Number Publication Date
CN202214968U true CN202214968U (en) 2012-05-09

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Application Number Title Priority Date Filing Date
CN2011202942983U Expired - Lifetime CN202214968U (en) 2011-08-15 2011-08-15 Overhanging scaffold erection structure

Country Status (1)

Country Link
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105350761A (en) * 2015-11-06 2016-02-24 广西华业建筑工程有限公司 Installation method of I-steel cantilevered external scaffolding
CN108104453A (en) * 2017-11-30 2018-06-01 中国二十冶集团有限公司 Cantilevered structure construction method
CN111946042A (en) * 2020-08-25 2020-11-17 中建八局第四建设有限公司 Method for building external scaffold of concrete cantilever structure and external scaffold device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105350761A (en) * 2015-11-06 2016-02-24 广西华业建筑工程有限公司 Installation method of I-steel cantilevered external scaffolding
CN108104453A (en) * 2017-11-30 2018-06-01 中国二十冶集团有限公司 Cantilevered structure construction method
CN111946042A (en) * 2020-08-25 2020-11-17 中建八局第四建设有限公司 Method for building external scaffold of concrete cantilever structure and external scaffold device

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CX01 Expiry of patent term

Granted publication date: 20120509

CX01 Expiry of patent term