CN110725525A - Supporting device of assembled cantilever scaffold and construction method thereof - Google Patents
Supporting device of assembled cantilever scaffold and construction method thereof Download PDFInfo
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- CN110725525A CN110725525A CN201911029763.8A CN201911029763A CN110725525A CN 110725525 A CN110725525 A CN 110725525A CN 201911029763 A CN201911029763 A CN 201911029763A CN 110725525 A CN110725525 A CN 110725525A
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- 238000010276 construction Methods 0.000 title abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 191
- 239000010959 steel Substances 0.000 claims abstract description 191
- 238000004873 anchoring Methods 0.000 claims abstract description 39
- 239000004567 concrete Substances 0.000 claims description 27
- 239000011150 reinforced concrete Substances 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 3
- 238000009415 formwork Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000007493 shaping process Methods 0.000 abstract description 5
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- 229910000746 Structural steel Inorganic materials 0.000 description 4
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- 238000010008 shearing Methods 0.000 description 2
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G3/00—Scaffolds essentially supported by building constructions, e.g. adjustable in height
- E04G3/18—Scaffolds essentially supported by building constructions, e.g. adjustable in height supported by cantilevers or other provisions mounted in openings in the building, e.g. window openings
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G5/00—Component parts or accessories for scaffolds
- E04G5/04—Means for fastening, supporting, or bracing scaffolds on or against building constructions
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Abstract
The invention provides a supporting device of an assembled cantilever scaffold and a construction method thereof, wherein the supporting device comprises a first embedded anchoring piece, a second embedded anchoring piece, a cantilever steel beam and a spliced diagonal draw bar; the cantilever steel beam comprises an I-shaped steel and a head steel plate, the head steel plate is welded at one end of the I-shaped steel, and the head steel plate is connected with the lower layer through a first pre-embedded anchoring part; a steel pipe for positioning and connecting the upright rod of the scaffold is arranged on the I-shaped steel; the I-shaped steel is provided with a bolt, the bolt is used for connecting a spliced diagonal draw bar, one end of the bolt is welded and fixed on a side wing plate of the I-shaped steel, and the bolt and the steel pipe are arranged in a staggered manner; one end of the spliced diagonal draw bar is fixed with the upper layer through the second pre-embedded anchoring part, and the other end of the spliced diagonal draw bar is connected with the bolt on the I-shaped steel, so that the other end of the spliced diagonal draw bar is connected with the I-shaped steel. The shaping processing and manufacturing of the cantilever type steel beam component are realized, no welding operation is carried out on a construction site, the processing and manufacturing quality of a welding joint is guaranteed, and the turnover use efficiency of the section steel cantilever beam is increased due to the use of the shaping component.
Description
Technical Field
The invention relates to the field of constructional engineering, in particular to a supporting device of an assembled cantilever scaffold and a construction method thereof.
Background
The overhanging scaffold mainly adopts the anchoring overhanging type steel beam on the floor surface of a structure, one part of the overhanging type steel beam is anchored in the floor, the other part of the overhanging type steel beam is overhanging outside the structure, and an enclosure form of the scaffold is built on the upper part of overhanging type steel, so that the overhanging type steel beam is the most important protection facility for building structure construction, and particularly, the overhanging type scaffold for high-rise building structure construction is more widely used and becomes one of the most important protection systems for high-rise building structure construction.
The cantilever type scaffold supporting system is mainly characterized in that a structural steel cantilever scaffold body system is selected according to engineering requirements, cantilever structural steel is fixed and generally adopts pre-embedded 'n' -shaped round steel in a structural floor slab, a part structural steel with large cantilever length is generally additionally provided with a welding groove steel inclined strut at the bottom close to the tail end of a cantilever beam so as to enhance the bending resistance of the cantilever beam, and a vertical pipe is erected and generally temporarily spot-welded on the cantilever structural steel. This kind of scaffold frame requires anchor length according to the standard not less than 1.25 times of the length of encorbelmenting, consequently the quantity of the shaped steel of encorbelmenting is great relatively, and one item of the most one of this kind of scaffold frame is done simultaneously, and the scaffold frame supporting system constructs the accessory and recycles very little, and the anchor of shaped steel outrigger is because pre-buried "nearly" font round steel, and the space is great, will fix the shaped steel of encorbelmenting, need fill in the wedge billet at pre-buried "nearly" font round steel top, and it takes time to set up, takes material, and material reuse efficiency and work efficiency are all relatively lower, and shaped steel outrigger passes through inside and outside the floor, can influence the construction of building two structures.
At present, U bolts are embedded in cast-in-place concrete floors, customized steel sheets and fastening bolts are used as steel anchor pieces of cantilever steel profiles, the cantilever scaffold is improved slightly, steel anchor measures are improved slightly relatively, but the cantilever scaffold still does not change the inner and outer sides of the outer wall of the floor, the construction of the outer wall and the floor partition wall of the two structures is influenced, the construction quality of the two structures is mainly reflected, the construction period of the whole two structures is influenced, and the construction process of the two structures of a project is not facilitated.
Also there is pre-buried in the structural formula of pulling up scaffold strutting arrangement that encorbelments at present, through the retrieval, chinese patent publication is CN 205777424U's utility model patent, discloses an anchor in the formula of pulling up scaffold strutting arrangement that encorbelments outside the structure, including pre-buried device, load I-steel roof beam, connecting plate, high strength bolt, go up pull rod device and top anchor system, pre-buried device be the steel embedded sleeve pipe of length with the wall thickness, load I-steel roof beam pass through high strength bolt anchor, high strength bolt passes to set up in pre-buried cover intraductally, top anchor system is high strength bolt anchor, the tightening method of steel pull rod is that two-way turn buckle screws up, top anchor system position, the back sets up the steel backing plate. However, in the above patent, the wall-through bolt is adopted to anchor the bearing I-shaped steel and the upper pull rod, and the construction of the two structures is carried out before the scaffold is dismantled, and the wall-through bolt is adopted to influence the outer wall plugging construction in the outer wall construction, and meanwhile, the existence of the outer wall-through bolt hole can also become a hidden trouble point of outer wall leakage.
The application number is 201810588066.5, and the Chinese patent discloses an assembled steel cantilever scaffold and a construction method thereof, wherein the cantilever steel part comprises I-shaped steel, an end plate and a channel steel adjusting beam, one end of each of two channel steels of the channel steel adjusting beam is welded and fixed on the end plate, and the end plate and a building structure are fixed through split bolts and nuts; the pull rod assembly comprises a wall angle adjusting piece, an upper pull rod, a turn buckle and a lower pull rod, the wall angle adjusting piece and the building structure are fixedly connected through a split bolt and a nut, the wall angle adjusting piece and one end of the upper pull rod are connected through a bolt and a nut in a locking mode, the other end of the upper pull rod is connected with one end of the turn buckle in a threaded mode, the other end of the turn buckle is connected with one end of the lower pull rod in a threaded mode, and the other end of the lower pull rod is connected with the lug plate in a locking mode through a bolt and a nut. However, the cantilever steel and the anchoring piece of the outer end pull rod are specially used for the through-wall split bolt, the through-wall split bolt also affects the construction of the outer wall, and the bolt hole of the outer wall also becomes a great hidden danger point of the leakage of the outer wall, so that the defect that the construction quality of the outer wall is affected exists.
Disclosure of Invention
In view of the defects in the prior art, the invention aims to provide a supporting device of an assembled cantilever scaffold and a construction method thereof.
According to a first aspect of the invention, a supporting device of an assembled cantilever scaffold is provided, which comprises a first pre-embedded anchoring piece, a second pre-embedded anchoring piece, a cantilever steel beam and a spliced diagonal draw bar; wherein,
the first embedded anchoring part is arranged at the end part of the lower layer of the existing main body structure;
the second embedded anchoring part is arranged at the upper end part of the existing main body structure;
the cantilever steel beam comprises an I-shaped steel and a head steel plate, the head steel plate is welded at one end of the I-shaped steel, and the head steel plate is connected with the end part of the lower layer through the first embedded anchoring part;
the upper side wing plate of the I-shaped steel is provided with a steel pipe for positioning and connecting the scaffold upright rod;
bolts are arranged on the upper side wing plate of the I-shaped steel close to the outer end and used for connecting the spliced diagonal draw bars, one ends of the bolts are welded and fixed on the side wing plate, and the bolts and the steel pipes are arranged in a staggered mode;
the spliced diagonal draw bar is arranged above the cantilever steel beam, one end of the spliced diagonal draw bar is passed through the second pre-embedded anchoring piece and the upper end part of the cantilever steel beam are fixed, and the other end of the spliced diagonal draw bar is connected with the side wing plate of the I-shaped steel through the bolt.
Preferably, the first embedded anchor comprises a first L-shaped embedded part screw, a first gasket and a first fastening double nut, wherein the first gasket is arranged between the end socket steel plate and the first fastening double nut and used for increasing the contact area between the first fastening double nut and the first end socket steel plate.
Preferably, two first bolt holes are symmetrically formed in two sides of the end socket steel plate web and used for being connected with the first embedded anchoring piece, and one end of the L-shaped embedded part screw penetrates through the first bolt holes and is fixed through the first fastening double nuts.
Preferably, the spliced diagonal draw bar is formed by splicing an upper section of draw bar, a lower section of draw bar and an adjusting middle section, wherein,
the upper end part of the upper section pull rod is provided with a second bolt hole which is used for connecting the second embedded anchoring piece;
a third bolt hole is formed in the lower end portion of the lower section pull rod and used for being connected with the bolt on the side wing plate of the I-shaped steel;
an adjustable bolt lock catch is arranged on the adjusting middle section;
the adjusting middle section is connected with the upper section pull rod and the lower section pull rod through the adjustable bolt lock catch respectively and is used for adjusting the length of the spliced type diagonal pull rod to ensure that the spliced type diagonal pull rod is in a stressed and tensioned state.
Preferably, the upper section pull rod is prefabricated by using bar steel, the upper end part of the upper section pull rod is a first rectangular plate-shaped component, and the second bolt hole is formed in the center of the first rectangular plate-shaped component;
the lower section pull rod is prefabricated by strip steel, the lower end portion of the lower section pull rod is a second rectangular plate-shaped component, and the third bolt hole is formed in the center of the second rectangular plate-shaped component.
Preferably, the adjusting middle section comprises two rectangular steel plates which are arranged face to face, two upper-section adjustable bolt locks and two lower-section adjustable bolt locks are arranged on the two rectangular steel plates, the upper-section adjustable bolt locks and the lower-section adjustable bolt locks respectively penetrate through the two rectangular steel plates, so that a crack is formed between two opposite surfaces of the two rectangular steel plates, the upper-section pull rod and the lower-section pull rod are respectively inserted into two ends of the crack, the upper-section pull rod is connected with the upper-section adjustable bolt locks, and the lower-section pull rod is connected with the lower-section adjustable bolt locks.
Preferably, the second embedded anchor comprises a second L-shaped embedded part screw, a second gasket and a second fastening double nut, and the second gasket is arranged between the upper end of the upper section pull rod and the second fastening double nut and is used for increasing the contact area between the second fastening double nut and the upper end of the upper section pull rod.
Preferably, the cantilever steel beam comprises a plurality of cantilever steel beams and a plurality of spliced diagonal draw bars; the number of the spliced diagonal draw bars is less than that of the cantilever steel beams.
Preferably, the length of the steel pipe is less than 100 mm.
According to a second aspect of the present invention, there is provided a method of constructing a supporting device for a fabricated cantilever scaffold, comprising:
according to the plane arrangement of the cantilever steel beams, pre-burying and fixing a first pre-buried anchoring piece before the floor structure concrete formwork is sealed until concrete pouring is finished;
after the concrete strength meets the requirement, a plurality of overhanging steel beams are installed on the lower-layer concrete structure at intervals, and the end socket steel plate ends of the overhanging steel beams are connected with the first pre-buried anchoring piece and are screwed up through a first fastening double nut;
arranging scaffold upright posts at the positions of the steel pipes of the cantilever steel beams, and sleeving the scaffold upright posts on the steel pipes to realize the position fixation of the scaffold steel pipes, wherein the scaffold upright posts cannot deviate due to the action of external force;
pre-burying and fixing a second pre-buried anchoring piece before pouring concrete of the upper reinforced concrete structure until the concrete pouring is finished;
after the strength of the upper concrete reaches the requirement, connecting the spliced diagonal draw bar, connecting the upper end part of the spliced diagonal draw bar with the second pre-embedded anchoring part, and screwing the spliced diagonal draw bar and the upper concrete structure through second fastening double nuts to realize the fixation of the spliced diagonal draw bar and the upper concrete structure; and connecting the lower end part of the spliced diagonal draw bar with a bolt on an upper side wing plate of the I-shaped steel through a bolt to complete the installation of the spliced diagonal draw bar.
Compared with the prior art, the invention has at least one of the following beneficial effects:
the device realizes the shaping processing and manufacturing of the cantilever type steel beam component, each assembled component can be prefabricated and processed in a factory, no welding operation is carried out on a construction site, the processing and manufacturing quality of a welding joint is ensured, and the turnover use efficiency of the section steel cantilever beam is increased due to the use of the shaping component.
Furthermore, the first pre-embedded anchoring piece, the second pre-embedded anchoring piece and the profile steel are fixed in the device, so that the influence on the structural outer wall can be reduced, particularly, the plugging construction of the two structures is realized, and meanwhile, the hidden danger of water seepage after the conventional through-wall bolt hole is plugged in the prior art is avoided.
Furthermore, the connection among all the assembled components of the device is more convenient, and on the other hand, the length of the supporting outrigger is reduced, compared with the conventional cantilever frame, the length of the outrigger is much shorter, the weight of the outrigger is reduced, the labor intensity of carrying the section steel outrigger by workers is reduced, and the labor efficiency of the installation of all the components in the supporting device is improved.
Furthermore, the spliced diagonal draw bar is adopted in the device, so that the device is more convenient to install, the labor force can be saved by 30 percent and the time can be saved by 40 percent for the building with the same perimeter, and the social benefit is obvious.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic structural view of a first pre-embedded anchor according to an embodiment of the invention;
FIG. 3 is an elevation view of an overhanging steel beam anchor of one embodiment of the present invention;
FIG. 4a is a schematic structural diagram of an upper segment link according to an embodiment of the present invention;
FIG. 4b is a schematic view of a lower segment link according to an embodiment of the present invention;
FIG. 4c is a schematic structural diagram of an adjustment center section according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of an overhanging steel beam according to an embodiment of the invention;
FIG. 6 is a schematic perspective view of an embodiment of the present invention;
in the figure: the scaffold comprises I-shaped steel 1, bolts 2, steel pipes 3, end enclosure steel plates 4, spliced diagonal draw bars 5, upper section pull bars 5-1, lower section pull bars 5-2, adjusting middle sections 6, upper section adjustable bolt lock catches 6-1, lower section adjustable bolt lock catches 6-2, first L-shaped embedded part screw rods 7-1, first gaskets 7-2, first fastening double nuts 7-3, second L-shaped embedded part screw rods 8-1, second fastening double nuts 8-2, an upper layer 9-1 of a main body structure, a lower layer 9-2 of the main body structure and scaffold upright rods 10.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that variations and modifications can be made by persons skilled in the art without departing from the spirit of the invention. All falling within the scope of the present invention.
Hereinafter, "first" and "second" are used merely for convenience of description, and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present embodiment, "a plurality" means two or more unless otherwise specified.
Referring to fig. 1, which is a structural schematic diagram of a supporting device of an assembled cantilever scaffold according to a preferred embodiment of the present invention, the supporting device includes two first pre-embedded anchors, two second pre-embedded anchors, a cantilever steel beam, and a spliced diagonal draw bar 5; the first pre-embedded anchoring piece is pre-embedded in reinforced concrete at the end part of a lower reinforced concrete structure 9-2 of the existing main body structure; the second pre-embedded anchoring piece is pre-embedded in reinforced concrete at the end part of the upper layer reinforced concrete structure 9-1 of the existing main body structure.
The cantilever steel beam comprises an I-steel 1 and an end socket steel plate 4, the end socket steel plate 4 is welded at one end of the I-steel 1, and the end socket steel plate 4 is connected with the end part of the lower layer reinforced concrete structure 9-2 through two first embedded anchoring parts.
The upper side wing plate of the I-steel 1 is provided with a steel pipe 3 for positioning and connecting the scaffold upright stanchion 10, the diameter of the steel pipe 3 is smaller than that of the scaffold upright stanchion 10, and the scaffold upright stanchion 10 is sleeved on the steel pipe 3.
During specific implementation, a plurality of steel pipes 3 are arranged at certain intervals along the length direction of the I-shaped steel 1, and the bottom ends of the steel pipes 3 are welded with the upper side wing plate of the I-shaped steel 1. As another preferred embodiment, a short steel pipe having a length of less than 100mm is used as the steel pipe 3. The bolt 2 is arranged at the position, close to the outer end, of the upper side wing plate of the I-shaped steel 1, the bolt 2 is used for being connected with the spliced diagonal draw bar 5, one end of the bolt 2 is welded and fixed on the side wing plate, and the bolt 2 and the steel pipe 3 are arranged on the upper side wing plate of the I-shaped steel 1 in a staggered mode.
The spliced diagonal draw bar 5 is arranged above the cantilever steel beam, one end of the spliced diagonal draw bar is fixed with the end part of the upper reinforced concrete structure 9-1 through the second pre-embedded anchoring part, the other end of the spliced diagonal draw bar 5 is connected with the side wing plate upper bolt 2 of the I-shaped steel 1 through bolting, and the other end of the spliced diagonal draw bar 5 is connected with the I-shaped steel 1.
Above-mentioned supporting arrangement has realized that all components all adopt the standard component form to assemble, and component easy dismounting, the length of the girder steel of encorbelmenting among the device compares conventional cantilever beam length of cantilever frame and is short a lot, when saving steel, component weight alleviates greatly, dismouting safety risk reduces, has reduced operating personnel's working strength simultaneously.
In other preferred embodiments, as shown with reference to FIG. 2, the first embedment anchor includes a first L-shaped embedment screw 7-1, a first shim 7-2, and a first fastening double nut 7-3, the L-end of the first L-shaped embedment screw 7-1 being pre-embedded in the reinforced concrete, the straight section being threaded. The first gasket 7-2 is arranged between the end socket steel plate 4 and the first fastening double-screw cap 7-3 and used for increasing the contact area between the first fastening double-screw cap 7-3 and the first end socket steel plate 4, so that the shearing force of the fastening force generated when the first fastening double-screw cap 7-3 is fastened on the end socket steel plate 4 is reduced, and the effect of protecting the end socket steel plate 4 is better achieved.
Referring to fig. 3, two first bolt holes are symmetrically formed in two sides of a web plate of the head steel plate 4 and used for connecting a first embedded anchor, in the specific implementation, the position of a first L-shaped embedded part screw 7-1 corresponds to the two first bolt holes of the head steel plate 4, and one end of the first L-shaped embedded part screw 7-1 penetrates through the first bolt holes and is fixed through a first fastening double nut 7-3.
In other preferred embodiments, referring to fig. 1, 4a, 4b and 4c, the spliced diagonal draw bar 5 is formed by splicing an upper section draw bar 5-1, a lower section draw bar 5-2 and an adjusting middle section 6, wherein the upper section draw bar 5-1 is made of strip steel, the upper end of the upper section draw bar 5-1 is provided with two second bolt holes, and the second bolt holes are used for connecting second pre-buried anchors; the lower section pull rod 5-2 is also made of strip steel, and a third bolt hole is formed in the lower end portion of the lower section pull rod 5-2 and used for being connected with a bolt 2 on a side wing plate of the I-steel 1; the adjustable middle section 6 is provided with an adjustable bolt lock catch, and the adjustable middle section 6 is respectively connected with the upper section pull rod 5-1 and the lower section pull rod 5-2 through the adjustable bolt lock catch and is used for adjusting the length of the spliced type diagonal draw bar 5 and ensuring that the spliced type diagonal draw bar 5 is in a stress tensioning state.
Referring to fig. 4a, the upper section pull rod 5-1 is made of strip steel, the upper end portion of the upper section pull rod 5-1 is a first rectangular plate-shaped part, two second bolt holes are formed in the center of the first rectangular plate-shaped part and used for connecting a second L-shaped embedded part screw 8-1, and one end of the second L-shaped embedded part screw 8-1 penetrates through the second bolt holes and is fixed through a second fastening double nut 8-2.
Referring to fig. 4b, the lower tie rod 5-2 is prefabricated by using a bar steel, the lower end of the lower tie rod 5-2 is a second rectangular plate-shaped member, and a third bolt hole is formed in the center of the second rectangular plate-shaped member.
The second embedded anchor comprises a second L-shaped embedded part screw 8-1, a second gasket and a second fastening double nut 8-2, the L end of the second L-shaped embedded part screw 8-1 is embedded in the reinforced concrete, and the straight section is threaded. In specific implementation, the position of the second L-shaped embedded part screw 8-1 corresponds to the second bolt hole at the upper end part of the upper section pull rod 5-1. The second gasket is arranged between the upper end part (rectangular plate-shaped component) of the upper section pull rod 5-1 and the second fastening double nut 8-2 and is used for increasing the contact area between the second fastening double nut 8-2 and the upper end part (rectangular plate-shaped component) of the upper section pull rod 5-1, so that the shearing force of the fastening force generated when the second fastening double nut 8-2 is fastened on the upper end part (rectangular plate-shaped component) can be reduced, and the effect of better protecting the rectangular plate-shaped component on the upper end part is achieved.
Referring to fig. 4c, the adjusting middle section 6 comprises two rectangular steel plates, the two rectangular steel plates are arranged face to face, two upper section adjustable bolt lock catches 6-1 and two lower section adjustable bolt lock catches 6-2 are arranged on the two rectangular steel plates, the upper section adjustable bolt lock catches 6-1 and the lower section adjustable bolt lock catches 6-2 respectively penetrate through the two rectangular steel plates, and a crack is formed between the two opposite surfaces of the two rectangular steel plates. An upper section pull rod 5-1 and a lower section pull rod 5-2 are respectively inserted from two ends of a crack, then the upper section pull rod 5-1 is connected with an upper section adjustable bolt lock catch 6-1, the lower section pull rod 5-2 is connected with a lower section adjustable bolt lock catch 6-2, and two rectangular steel plates are respectively fastened with the upper section pull rod 5-1 and the lower section pull rod 5-2 by adopting two adjustable bolt lock catches.
In other preferred embodiments, as shown in fig. 5 and 6, the supporting device includes a plurality of cantilever steel beams and a plurality of spliced diagonal braces, the number of the spliced diagonal braces being less than the number of the cantilever steel beams, for example: a plurality of steel girders of encorbelmenting are arranged at intervals on the existing main structure, and a spliced diagonal draw bar is arranged on one steel girder of encorbelmenting at intervals.
In the construction of a new high-rise building, in order to ensure the construction safety of a main structure and the decoration construction of an outer wall, scaffold enclosure is needed, and the construction requirement of the main structure cannot be met due to the limitation of the erection height of a common floor scaffold, so that an overhanging scaffold erected in sections from low to high needs to be adopted, and the structural characteristics of the assembled overhanging scaffold are further explained by using the supporting device of the assembled overhanging scaffold in the construction with reference to fig. 1, 5 and 6.
The specific construction can comprise the following steps:
firstly, carrying out plane arrangement and structural design of a supporting device according to the high-rise building structure design drawing, and carrying out safety analysis and calculation on the supporting device;
secondly, according to the design of the supporting device, preparing materials and processing and manufacturing corresponding components (the cantilever steel beam, the splicing type inclined pull rod 5 and the pre-buried anchoring piece) in a factory, and transporting the components to a construction site in batches;
thirdly, pre-burying a first L-shaped pre-buried screw 7-1 of a first pre-buried anchoring piece before the floor structure concrete formwork is sealed according to the plane arrangement of the cantilever steel beams, and reliably fixing the pre-buried screw until the concrete pouring is finished;
fourthly, after the concrete strength reaches C10 or above, referring to the figure 5, installing a plurality of cantilever steel beams on the lower-layer concrete structure 9-2 at intervals, connecting the end socket steel plate 4 of each cantilever steel beam with the first pre-embedded L-shaped screw 7-1 of the first pre-embedded anchoring piece, and screwing the cantilever steel beams through first fastening double nuts 7-3 so as to anchor and install cantilever steel beam section steel;
fifthly, arranging the scaffold upright stanchions 10 at the positions of the steel pipes 3 at the tops of the overhanging steel beams, and directly sleeving the scaffold upright stanchions 10 on the steel pipes 3 to realize the position fixation of the scaffold steel pipes 3, wherein the scaffold upright stanchions 10 cannot generate deviation under the action of external force;
sixthly, pre-burying a second L-shaped pre-buried part screw 8-1 of a second pre-buried anchoring part before pouring concrete of the upper layer reinforced concrete structure 9-1, and reliably fixing the second L-shaped pre-buried part screw until the pouring of the concrete is finished;
seventhly, after the strength of the upper-layer concrete reaches above C10, connecting and installing the spliced diagonal draw bar 5, connecting the upper end part of the upper-section draw bar 5-1 with a second L-shaped embedded part screw rod, and screwing the upper-section draw bar 5-1 and the upper-layer concrete structure 9-1 through a second fastening double nut 8-2; the lower end part of the lower section pull rod 5-2 is connected with a bolt 2 on an upper side wing plate of the I-shaped steel 1 through the bolt 2, and therefore the reinforced upper pull rod is installed.
After above-mentioned step, accomplished the installation of the supporting device that the scaffold frame of encorbelmenting set up, operating personnel is at the top of the scaffold frame of lower part, can carry out the setting up of the scaffold frame of encorbelmenting of this structure construction, the scaffold frame stand pole 10, horizontal pole and auxiliary facilities of encorbelmenting upper portion demolish the completion back, stand and to twist the bolt loose on the top backing plate of lower part scaffold frame and can dismantle the girder steel of encorbelmenting, each component of the corresponding supporting device of categorised recovery, the component rate of recovery reuse is high, the turnover is convenient.
In summary, in this embodiment, on one hand, the components are manufactured by shaping processing, so that the connection between the components is more convenient, on the other hand, the length of the supporting outriggers (cantilever steel beams) is reduced, the weight of the outriggers is reduced, the labor intensity of workers for carrying the section steel outriggers is reduced, the labor efficiency of installation of each component in the supporting device is improved, due to the adoption of the upper pull rods, the installation of the supporting device is more convenient than that of the lower supporting device, the labor force can be saved by 30%, the time can be saved by 40% for the building with the same perimeter, and the social benefit is obvious.
All the components used in this document may be standard components or conventional components, and may be purchased from the market, the specific connection manner of each component may be conventional means such as bolts, rivets and welding, etc., the conventional connection manner of machines, components and electrical equipment is conventional, and the conventional connection manner of circuit is conventional, and is easily implemented by those skilled in the art, and will not be described herein.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes and modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (10)
1. The supporting device of the assembled cantilever scaffold is characterized by comprising a first pre-embedded anchoring piece, a second pre-embedded anchoring piece, a cantilever steel beam and a spliced diagonal draw bar; wherein,
the first embedded anchoring part is arranged at the end part of the lower layer of the existing main body structure;
the second embedded anchoring part is arranged at the upper end part of the existing main body structure;
the cantilever steel beam comprises an I-shaped steel and a head steel plate, the head steel plate is welded at one end of the I-shaped steel, and the head steel plate is connected with the end part of the lower layer through the first embedded anchoring part;
the upper side wing plate of the I-shaped steel is provided with a steel pipe for positioning and connecting the scaffold upright rod;
bolts are arranged on the upper side wing plate of the I-shaped steel close to the outer end and used for connecting the spliced diagonal draw bars, one ends of the bolts are welded and fixed on the side wing plate, and the bolts and the steel pipes are arranged in a staggered mode;
the spliced diagonal draw bar is arranged above the cantilever steel beam, one end of the spliced diagonal draw bar is passed through the second pre-embedded anchoring piece and the upper end part of the cantilever steel beam are fixed, and the other end of the spliced diagonal draw bar is connected with the side wing plate of the I-shaped steel through the bolt.
2. The supporting device of an assembled cantilever scaffold according to claim 1, wherein the first pre-buried anchor comprises a first L-shaped pre-buried part screw, a first gasket and a first fastening double nut, and the first gasket is arranged between the end socket steel plate and the first fastening double nut and used for increasing the contact area between the first fastening double nut and the first end socket steel plate.
3. The supporting device of an assembled cantilever scaffold according to claim 2, wherein two first bolt holes are symmetrically formed on both sides of the head steel plate web for connecting the first embedded anchor, and one end of the L-shaped embedded part screw rod passes through the first bolt holes and is fixed by the first fastening double nut.
4. The supporting device of an assembled cantilever scaffold of claim 1, wherein the spliced diagonal draw bar is composed of an upper segment draw bar, a lower segment draw bar and an adjusting middle segment splice, wherein,
the upper end part of the upper section pull rod is provided with a second bolt hole which is used for connecting the second embedded anchoring piece;
a third bolt hole is formed in the lower end portion of the lower section pull rod and used for being connected with the bolt on the side wing plate of the I-shaped steel;
an adjustable bolt lock catch is arranged on the adjusting middle section;
the adjusting middle section is connected with the upper section pull rod and the lower section pull rod through the adjustable bolt lock catch respectively and is used for adjusting the length of the spliced type diagonal pull rod to ensure that the spliced type diagonal pull rod is in a stressed and tensioned state.
5. The supporting device of an assembled cantilever scaffold according to claim 1, wherein the upper section tie rod is prefabricated by using a bar steel, the upper end of the upper section tie rod is a first rectangular plate-shaped member, and the second bolt hole is arranged at the center of the first rectangular plate-shaped member;
the lower section pull rod is prefabricated by strip steel, the lower end portion of the lower section pull rod is a second rectangular plate-shaped component, and the third bolt hole is formed in the center of the second rectangular plate-shaped component.
6. The supporting device of an assembled cantilever scaffold of claim 1, the adjusting middle section comprises two rectangular steel plates which are arranged face to face, two upper-section adjustable bolt lock catches and two lower-section adjustable bolt lock catches are arranged on the two rectangular steel plates, the upper-section adjustable bolt lock catch and the lower-section adjustable bolt lock catch respectively penetrate through the two rectangular steel plates to form a crack between two opposite surfaces of the two rectangular steel plates, the upper section pull rod and the lower section pull rod are respectively inserted from two ends of the crack, the upper section pull rod is connected with the upper section adjustable bolt in a locking way, the lower section pull rod is connected with the lower section adjustable bolt through a lock catch, and the two rectangular steel plates are fastened with the upper section pull rod and the lower section pull rod through the upper section adjustable bolt lock catch and the lower section adjustable bolt lock catch respectively.
7. The supporting device of an assembled cantilever scaffold of claim 4, wherein the second pre-buried anchor comprises a second L-shaped pre-buried part screw, a second gasket and a second fastening double nut, the second gasket is arranged between the upper end of the upper section pull rod and the second fastening double nut for increasing the contact area between the second fastening double nut and the upper end of the upper section pull rod.
8. The supporting device of a fabricated cantilever scaffold according to any one of claims 1 to 7, comprising a plurality of cantilever steel beams and a plurality of spliced diagonal draw bars; the number of the spliced diagonal draw bars is less than that of the cantilever steel beams.
9. A support means for a fabricated overhanging scaffold according to any one of claims 1 to 7, wherein the length of the steel tube is less than 100 mm.
10. A method of constructing a supporting structure of a fabricated cantilever scaffold according to claim 1, comprising:
according to the plane arrangement of the cantilever steel beams, pre-burying and fixing a first pre-buried anchoring piece before the floor structure concrete formwork is sealed until concrete pouring is finished;
after the strength of concrete meets the requirement, a plurality of overhanging steel beams are installed on a lower-layer concrete structure at intervals, and the end socket steel plate ends of the overhanging steel beams are connected with the first pre-embedded anchoring piece and are screwed up through first fastening double nuts;
arranging scaffold upright posts at the positions of the steel pipes of the cantilever steel beams, and sleeving the scaffold upright posts on the steel pipes to realize the position fixation of the scaffold steel pipes, wherein the scaffold upright posts cannot deviate due to the action of external force;
pre-burying and fixing a second pre-buried anchoring piece before pouring concrete of the upper layer reinforced concrete structure until the pouring of the concrete is finished;
after the strength of the upper concrete reaches the requirement, connecting the spliced diagonal draw bar, connecting the upper end part of the spliced diagonal draw bar with the second pre-embedded anchoring part, and screwing the spliced diagonal draw bar and the upper concrete structure through second fastening double nuts to realize the fixation of the spliced diagonal draw bar and the upper concrete structure; and connecting the lower end part of the spliced diagonal draw bar with a bolt on an upper side wing plate of the I-shaped steel to complete the installation of the spliced diagonal draw bar.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911029763.8A CN110725525A (en) | 2019-10-28 | 2019-10-28 | Supporting device of assembled cantilever scaffold and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911029763.8A CN110725525A (en) | 2019-10-28 | 2019-10-28 | Supporting device of assembled cantilever scaffold and construction method thereof |
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| CN201911029763.8A Pending CN110725525A (en) | 2019-10-28 | 2019-10-28 | Supporting device of assembled cantilever scaffold and construction method thereof |
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| CN111734110A (en) * | 2020-06-17 | 2020-10-02 | 北京首钢建设集团有限公司 | Method for fixing overhanging section steel by high-strength bolt |
| CN112942791A (en) * | 2021-04-13 | 2021-06-11 | 北京天润建设有限公司 | Small-space lifting scaffold and construction method |
| CN114016718A (en) * | 2021-10-28 | 2022-02-08 | 中建四局第六建设有限公司 | A face empty operation platform for prefabricated building fire compartment wall is built by laying bricks or stones |
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