CN110886480A - Construction method of high-rise overhead cantilever support - Google Patents
Construction method of high-rise overhead cantilever support Download PDFInfo
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- CN110886480A CN110886480A CN201911228947.7A CN201911228947A CN110886480A CN 110886480 A CN110886480 A CN 110886480A CN 201911228947 A CN201911228947 A CN 201911228947A CN 110886480 A CN110886480 A CN 110886480A
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- 238000010276 construction Methods 0.000 title claims abstract description 33
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 96
- 239000010959 steel Substances 0.000 claims abstract description 96
- 239000002023 wood Substances 0.000 claims abstract description 11
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims abstract description 4
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 4
- 238000007711 solidification Methods 0.000 claims abstract description 4
- 230000008023 solidification Effects 0.000 claims abstract description 4
- 238000000034 method Methods 0.000 claims abstract description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 abstract description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
Classifications
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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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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Conveying And Assembling Of Building Elements In Situ (AREA)
Abstract
The invention discloses a construction method of a high-rise overhead cantilever support, which comprises the following steps: reinforcing the balcony outriggers of the lower roof layer; arranging a main steel beam on a balcony outrigger of a lower layer roof layer; setting an inclined support: the upper end of the inclined support is connected with the bottom of the main steel beam, and the lower end of the inclined support is connected with the lower-layer main structure beam; installing I-shaped steel trabeculae; paving a wood board operating platform on the I-shaped steel trabeculae; and erecting a template and binding reinforcing steel bars, pouring concrete, removing the template after solidification, and finally removing the inclined supports, the main steel beams, the I-shaped steel small beams and the wood plate operation platform. According to the invention, the inclined supports are arranged below the main steel beam, so that a multi-row triangular overhanging static support system is formed, the rigidity is good, the deformation is small, the quality is easy to control, the construction load is finally transmitted to the lower-layer main structure beam through the platform plate, the I-shaped steel trabecula, the main steel beam and the inclined supports, the construction process is safe and reliable, the assembly, disassembly and use are convenient, the components can be recycled, and the cost is saved.
Description
Technical Field
The invention relates to a construction method of a high-rise (including a super high-rise) building, in particular to a construction method of a high-rise overhead cantilever support.
Background
In the construction of the daily rise and the monthly dissimilarity of cities, more and more high-rise and super high-rise buildings are built, the attractive appearance of the buildings is pursued more and more, particularly, a roof structure is subjected to a plurality of shapes, an overhead cantilever structure of a plurality of roofs, such as a concrete overhead cantilever structure, is generated, and the key problem to be solved is to ensure the quality and the construction safety of the overhead cantilever structure of the high-rise and super high-rise roofs during construction.
When the overhead structure that encorbelments of construction roofing, the basis of "worker" word steel system as the support of encorbelmenting is generally adopted at present, but the length of encorbelmenting of "worker" word steel has great limitation, the anchor section length of standard regulation "worker" word steel should be greater than the 1.25 times of the length of encorbelmenting, when the length of encorbelmenting is greater than 2.63m, "worker" word steel overall length will exceed 6.0m, not only be difficult for the purchase goods on the market, it is heavy inconvenient to use, more importantly, the degree of disturbance is bigger than a bit behind the I-steel bearing, and can't find the structure in the upper portion and carry out the steel cable to one side and draw, be unfavorable for.
The load-bearing mode of adopting "I" word steel to encorbelment and joining in marriage oblique-pull wire rope needs the structure that upper portion has sufficient intensity to dispose the wire rope cable, and generally does not have suitable structure to dispose the cable to the roofing top, even all can wait to carry out after superstructure construction and concrete strength reach 75% (14 days), so inconvenient waiting for a long time.
In conclusion, the traditional high-rise overhead cantilever support construction mode adopting I-shaped steel as a support main body has the defects of inconvenience in use, inconvenience in disassembly and assembly, delay of construction period and no guarantee of safety.
Disclosure of Invention
The invention aims to solve the problems and provide a safe and reliable construction method for a high-rise overhead cantilever support, which is convenient to disassemble, assemble and use.
The invention realizes the purpose through the following technical scheme:
a construction method of a high-rise overhead cantilever support comprises the following steps:
step 1, reinforcing the balcony outriggers of the lower roof layer: the lower part of the balcony outrigger of the lower layer roof layer is provided with vertical steel pipes in an encrypted way;
step 2, arranging a main steel beam on the balcony outriggers of the lower roof layer: placing two ends of the main steel beam on steel backing plates in corresponding grooves on balcony outriggers of the lower layer roof layer by using a lifting appliance;
step 3, setting an inclined support: a plurality of inclined supports are arranged below the middle section of the main steel beam, the inclined supports adopt I-shaped steel columns, the upper ends of the inclined supports are connected with the bottom of the main steel beam, and the lower ends of the inclined supports are connected with the lower-layer main structure beam;
step 4, mounting I-shaped steel small beams: two ends of the I-shaped steel trabecula are respectively connected with the main steel beam and the lower-layer main structure beam;
step 5, paving a wood board operation platform on the I-shaped steel trabeculae;
and 6, erecting a template and binding reinforcing steel bars, pouring concrete, removing the template after solidification, and finally removing the inclined supports, the main steel beams, the I-shaped steel small beams and the wood plate operation platform.
Specifically, in the step 1, the diameter of the vertical steel pipe is 80mm, and the distance between the vertical steel pipes is 600 mm.
Specifically, a groove with the thickness of 210mm is preset on a concrete reversed ridge on the balcony cantilever beam of the lower roof layer, a steel base plate in the groove is a steel plate with the thickness of 200 × 300 × 10mm, and the main steel beam can be installed after the concrete strength of the lower roof layer reaches 75% after the concrete of the lower roof layer is poured for 14 days.
Specifically, in the step 3, the inclined supports are four and 16 # i-shaped steel columns, the upper ends of the inclined supports are connected with the bottoms of the main steel beams through screws, and the lower ends of the inclined supports are connected with the lower-layer main structure beam in a welding mode.
Preferably, the angle between the inclined support and the horizontal direction is 30-60 degrees.
In step 4, the I-shaped steel trabeculae are connected with the main steel beam through bolts, and the I-shaped steel trabeculae are connected with the lower main structure beam through embedded anchor bolts.
The invention has the beneficial effects that:
the invention forms a multi-row triangular overhanging static fixed supporting system by arranging the plurality of inclined supports below the main steel beam, has good rigidity, small deformation and easy quality control, the construction load transmits force to the I-shaped steel trabecula through the platform plate and the vertical steel pipe, then transmits the force to the main steel beam and the lower-layer main structure beam through the I-shaped steel trabecula, the stress of the main steel beam is transmitted to the plurality of inclined supports at the lower part, and finally transmits the force to the lower-layer main structure beam.
Detailed Description
The invention is further illustrated by the following examples:
the construction method of the high-rise overhead cantilever support comprises the following steps:
step 1, reinforcing the balcony outriggers of the lower roof layer with the thickness of 650 x 200 mm: the lower part of the balcony outrigger of the lower layer roof layer is provided with vertical steel pipes in an encrypted way; the diameter of the vertical steel pipes is 80mm, and the distance between the vertical steel pipes is 600 mm;
step 2, arranging 400 x 200 x 10mm main steel beams on the balcony outriggers of the lower roof layer: placing two ends of the main steel beam on steel backing plates in corresponding grooves on balcony outriggers of the lower layer roof layer by using a lifting appliance; the groove is realized in a preset mode: a groove with the thickness of 210mm is preset on a concrete back sill on the balcony cantilever beam of the lower roof layer, a steel base plate in the groove is a steel plate with the thickness of 200 x 300 x 10mm, and a main steel beam can be installed after the concrete of the lower roof layer reaches 70% after the concrete of the lower roof layer is poured for 14 days; the length of the main steel beam is 8000-9000mm, and a nut used for being connected with the inclined support is welded before the main steel beam is hoisted;
step 3, setting an inclined support: a plurality of inclined supports are arranged below the middle section of the main steel beam, the inclined supports adopt I-shaped steel columns, the upper ends of the inclined supports are connected with the bottom of the main steel beam, and the lower ends of the inclined supports are connected with the lower-layer main structure beam; the inclined struts are four steel columns which are No. 16H-shaped steel columns, the upper ends of the inclined struts are connected with the bottoms of the main steel beams through screws, the lower ends of the inclined struts are connected with the lower-layer main structure beam in a welding mode, and the included angle between each inclined strut and the horizontal direction is 30-60 degrees, preferably 45 degrees; the lower main structure beam is provided with a steel plate which is anchored with 200 × 300 × 10mm by 4 expansion bolts in advance and is used for being connected with the inclined support;
step 4, mounting I-shaped steel small beams: the method comprises the following steps that two ends of an I-shaped steel joist are respectively connected with a main steel beam and a lower-layer main structure beam, the I-shaped steel joist is connected with the main steel beam through bolts, and the I-shaped steel joist is connected with the lower-layer main structure beam through embedded anchor bolts;
step 5, paving a wood board operation platform on the I-shaped steel trabecula by using a wood board with the thickness of 50mm, firmly binding two ends of the wood board by using iron wires, and fully hanging a safety plain net under the wood board;
step 6, erecting a template and binding reinforcing steel bars, then pouring concrete, removing the template after solidification, and finally removing the inclined supports, the main steel beams, the I-shaped steel small beams and the wood plate operation platform; the steps are all conventional construction flows.
The effect of the present invention will be described in more detail below by taking the construction work of four buildings of a high-rise building.
Example (b):
the 2# and 3# buildings of the project are provided with flower frame layers above the 33 layers of roof layers by 98.85 meters, and the height of the layers is 6.5 meters. The length of the overhanging part is 15.0 meters and the width is 3.0 meters except for the overhanging part of the concrete beam and the concrete cast-in-place plate of the flower frame layer and the roof beam plate of 33 layers, the length of the overhanging part is 200X 700 meters, the length of the overhanging part is 200X 500 meters, the thickness of the overhanging part is 100 meters, the structure of the overhanging part is higher than the space of 105.35 meters (the height of the plate surface), the lower part is full space in the range of 8.4 meters, and the template support frame body has no solid and reliable foundation.
The 5# building and the 6# building of the project are provided with flower frame layers above the 33 layers of roof layers by 98.85 meters, and the layer height is 6.9 meters. The length of the overhanging part is 25.0 meters and the width is 1.9 meters except for the overhanging of the concrete beam of the lattice layer and the roof beam plate of 33 layers, each layer of the overhanging beam double layer is six 200 x 500(200 x 400) and each layer of the overhanging lock port beam double layer is 200 x 500(200 x 400), the structure of the part is higher than the sky of 105.75(106.85) meters (beam top height), the lower part is full-space, and the template support frame body has no solid and reliable foundation.
The construction method of the high-rise overhead cantilever support is adopted for construction, firstly, the safety of a support system is comprehensively improved, powerful guarantee is provided for the safety of construction operators, the operators can work safely, and the fear of high altitude is overcome; the assembly type installation mode improves the working efficiency, the construction is convenient and quick, and the construction site is neat and beautiful; the support system and the main body are constructed synchronously, the construction period is shortened, the construction period is 60 days (including the form removal time) every time, and the traditional mode is at least 90 days, so that the effect of the invention is remarkable.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the technical solutions of the present invention, so long as the technical solutions can be realized on the basis of the above embodiments without creative efforts, which should be considered to fall within the protection scope of the patent of the present invention.
Claims (6)
1. A high-rise overhead cantilever support construction method is characterized in that: the method comprises the following steps:
step 1, reinforcing the balcony outriggers of the lower roof layer: the lower part of the balcony outrigger of the lower layer roof layer is provided with vertical steel pipes in an encrypted way;
step 2, arranging a main steel beam on the balcony outriggers of the lower roof layer: placing two ends of the main steel beam on steel backing plates in corresponding grooves on balcony outriggers of the lower layer roof layer by using a lifting appliance;
step 3, setting an inclined support: a plurality of inclined supports are arranged below the middle section of the main steel beam, the inclined supports adopt I-shaped steel columns, the upper ends of the inclined supports are connected with the bottom of the main steel beam, and the lower ends of the inclined supports are connected with the lower-layer main structure beam;
step 4, mounting I-shaped steel small beams: two ends of the I-shaped steel trabecula are respectively connected with the main steel beam and the lower-layer main structure beam;
step 5, paving a wood board operation platform on the I-shaped steel trabeculae;
and 6, erecting a template and binding reinforcing steel bars, pouring concrete, removing the template after solidification, and finally removing the inclined supports, the main steel beams, the I-shaped steel small beams and the wood plate operation platform.
2. The high-rise overhead cantilever support construction method according to claim 1, characterized in that: in the step 1, the diameter of the vertical steel pipes is 80mm, and the distance between the vertical steel pipes is 600 mm.
3. The high-rise overhead cantilever support construction method according to claim 1, characterized in that: in the step 2, a groove with the thickness of 210mm is preset on the concrete reverse ridge on the balcony cantilever beam of the lower roof layer, the steel base plate in the groove is a steel plate with the thickness of 200 x 300 x 10mm, and the main steel beam can be installed after the concrete strength of the lower roof layer reaches 75% after the concrete is poured for 14 days.
4. The high-rise overhead cantilever support construction method according to claim 1, characterized in that: in the step 3, the inclined struts are four No. 16H-shaped steel columns, the upper ends of the inclined struts are connected with the bottoms of the main steel beams through screws, and the lower ends of the inclined struts are connected with the lower-layer main structure beam in a welding mode.
5. The high-rise overhead cantilever support construction method according to claim 4, characterized in that: in the step 3, an included angle between the inclined support and the horizontal direction is 30-60 degrees.
6. The high-rise overhead cantilever support construction method according to claim 1, characterized in that: in the step 4, the I-shaped steel trabeculae are connected with the main steel beam through bolts, and the I-shaped steel trabeculae are connected with the lower main structure beam through embedded anchor bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911228947.7A CN110886480A (en) | 2019-12-04 | 2019-12-04 | Construction method of high-rise overhead cantilever support |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911228947.7A CN110886480A (en) | 2019-12-04 | 2019-12-04 | Construction method of high-rise overhead cantilever support |
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| CN110886480A true CN110886480A (en) | 2020-03-17 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE9900500L (en) * | 1998-02-20 | 1999-08-21 | Karl Gustav Dunell | Console for work platform |
| CN105019639A (en) * | 2015-05-28 | 2015-11-04 | 河南国基建设集团有限公司 | Formwork with high cantilever structure and construction method thereof |
| CN205036072U (en) * | 2015-09-24 | 2016-02-17 | 浙江省长城建设集团有限公司 | A shaped steel formwork support that encorbelments for high altitude structure of encorbelmenting |
| CN205713096U (en) * | 2016-06-02 | 2016-11-23 | 江苏南通三建集团股份有限公司 | A kind of roofing cantilevered structure form bracing system |
| CN206016260U (en) * | 2016-08-31 | 2017-03-15 | 云南建投第三建设有限公司 | A kind of bracing frame of the plate that floats for xoncrete structure roofing |
-
2019
- 2019-12-04 CN CN201911228947.7A patent/CN110886480A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE9900500L (en) * | 1998-02-20 | 1999-08-21 | Karl Gustav Dunell | Console for work platform |
| CN105019639A (en) * | 2015-05-28 | 2015-11-04 | 河南国基建设集团有限公司 | Formwork with high cantilever structure and construction method thereof |
| CN205036072U (en) * | 2015-09-24 | 2016-02-17 | 浙江省长城建设集团有限公司 | A shaped steel formwork support that encorbelments for high altitude structure of encorbelmenting |
| CN205713096U (en) * | 2016-06-02 | 2016-11-23 | 江苏南通三建集团股份有限公司 | A kind of roofing cantilevered structure form bracing system |
| CN206016260U (en) * | 2016-08-31 | 2017-03-15 | 云南建投第三建设有限公司 | A kind of bracing frame of the plate that floats for xoncrete structure roofing |
Non-Patent Citations (2)
| Title |
|---|
| 丁艳宾: "《最新建筑工程抗裂堵漏施工技术与标准规范实务全书 上》", 30 June 2002, 长春：吉林人民出版社 * |
| 吴志红等: "《建筑施工技术》", 30 June 2016, 南京：东南大学出版社 * |
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Application publication date: 20200317 |
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