CN115596096A - Reverse construction method for overground nonstandard layer with cornice of full concrete outer wall structure - Google Patents
Reverse construction method for overground nonstandard layer with cornice of full concrete outer wall structure Download PDFInfo
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- CN115596096A CN115596096A CN202211171380.6A CN202211171380A CN115596096A CN 115596096 A CN115596096 A CN 115596096A CN 202211171380 A CN202211171380 A CN 202211171380A CN 115596096 A CN115596096 A CN 115596096A
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- 238000010276 construction Methods 0.000 title claims abstract description 69
- 230000009194 climbing Effects 0.000 claims abstract description 41
- 238000000034 method Methods 0.000 claims abstract description 34
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 30
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims description 60
- 239000010959 steel Substances 0.000 claims description 60
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims description 15
- 238000003466 welding Methods 0.000 claims description 15
- 239000002023 wood Substances 0.000 claims description 15
- 238000009415 formwork Methods 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 9
- 230000007547 defect Effects 0.000 claims description 4
- 238000004873 anchoring Methods 0.000 claims description 3
- 230000001681 protective effect Effects 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 239000004411 aluminium Substances 0.000 description 5
- 238000007493 shaping process Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/35—Extraordinary methods of construction, e.g. lift-slab, jack-block
- E04B1/3505—Extraordinary methods of construction, e.g. lift-slab, jack-block characterised by the in situ moulding of large parts of a structure
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/84—Walls made by casting, pouring, or tamping in situ
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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
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/06—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for walls, e.g. curved end panels for wall shutterings; filler elements for wall shutterings; shutterings for vertical ducts
-
- 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
- E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
- E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
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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
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
- E04G13/02—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for columns or like pillars; Special tying or clamping means therefor
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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
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
- E04G13/04—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for lintels, beams, or transoms to be encased separately; Special tying or clamping means therefor
-
- 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
- E04G13/00—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills
- E04G13/06—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for stairs, steps, cornices, balconies, or other parts corbelled out of the wall
- E04G13/066—Falsework, forms, or shutterings for particular parts of buildings, e.g. stairs, steps, cornices, balconies foundations, sills for stairs, steps, cornices, balconies, or other parts corbelled out of the wall for overhangs
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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
- E04G3/28—Mobile scaffolds; Scaffolds with mobile platforms
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention discloses a reverse construction method of a ground non-standard layer with cornices of a full concrete outer wall structure, and relates to the technical field of cornice construction of the non-standard layer. In order to solve the problem that the non-standard layer of the full cast-in-place concrete outer wall structure cannot be constructed by directly adopting an aluminum mould and a climbing frame, the overground non-standard layer reverse construction method comprises the following steps: carrying out operations of line snapping, anchor ring positioning and anchor ring embedding on a 32-layer top plate structure of a building, and preparing construction for building an overhanging scaffold in the later period; the method can fully utilize the aluminum mould of the standard layer of the full cast-in-place outer wall structure in the process of constructing the large roof layer, and can effectively ensure the construction efficiency and speed because the construction method is consistent with the standard layer.
Description
Technical Field
The invention relates to the technical field of non-standard layer cornice construction, in particular to a method for reversely constructing a ground non-standard layer with cornices on a full concrete outer wall structure.
Background
At present, in the field of building construction, a full-cast-in-place concrete outer wall, an aluminum alloy template and a climbing frame are necessary processes in a current quick penetration construction system, but roofs of some projects are different from the plane arrangement of a standard layer structure, cornices exist, and a gap of a cantilever frame is not reserved in the standard layer aluminum template, so that the standard layer process cannot be directly adopted for construction;
in order to solve the problem that a non-standard layer of a full cast-in-place concrete outer wall structure cannot be constructed by directly adopting an aluminum mould and a climbing frame, project determination and design are communicated to adjust the structural arrangement of a roof layer, the structure construction within the range of the outer wall of the roof layer is finished by using the aluminum mould and the climbing frame, the cornice range outside the outer wall is thrown temporarily, the climbing frame is climbed downwards in the later period to serve as a platform for building a suspension cantilever frame, then the construction cornice of the suspension cantilever frame is built, and the overground non-standard layer reverse-operation method with the cornice of the full concrete outer wall structure is provided.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a reverse construction method of a ground nonstandard layer of a full concrete outer wall structure with cornices.
In order to achieve the purpose, the invention adopts the following technical scheme:
a reverse construction method of a ground non-standard layer with cornices in a full concrete outer wall structure comprises the following steps:
s1: carrying out operations of line springing, anchor ring positioning and anchor ring embedding on a 32-layer roof structure of a building, and preparing construction for building an overhanging scaffold in the later period;
s2: pouring concrete on 32 layers of the building;
s3: after the concrete pouring is finished, the climbing frame is controlled to climb by utilizing the lifting equipment;
s4: binding reinforcing steel bars at 33 layers of wall columns of the building and embedding wood boxes for penetrating I-shaped steel;
s5: carrying out die assembly operation on 33 layers of wall column aluminum templates of the building;
s6: erecting an aluminum mould for the large roof layer beam slab;
s7: binding the reinforcing steel bars of the beam plate of the large roof layer and reserving cornice reinforcing steel bars;
s8: intercepting the cornice construction joint;
s9: carrying out concrete pouring on the beam plates within the range of the outer wall of the large roof layer;
s10: the climbing frame is used for climbing downwards by utilizing lifting equipment, and the climbing frame is used as an operation platform erected on the cantilever frame;
s11: i-shaped steel is erected on the overhanging layer, and an external scaffold is erected and tied with a steel wire rope;
s12: erecting a support frame of the cornice template;
s13: and (5) binding steel bars to the cornices, and pouring concrete to the cornices.
Preferably, the following components: and in the construction process of the 33 layers of the building, the wall columns are constructed by adopting aluminum moulds of the standard layers, and the beam plates of the large roof layer are constructed by adopting an aluminum-wood combined construction mode.
Preferably: and in the process of embedding the I-shaped steel wooden box, embedding the wooden box with the wall thickness of 300X 300 according to the drawing, and using the wooden box as a hole for penetrating and overhanging the I-shaped steel.
Preferred for the present invention are: the roof cantilever frame is as the support scaffold of roof eaves mouth, and the outrigger is single-row scaffold, and the outermost row scaffold is single-row scaffold.
As a preferable aspect of the present invention: and (5) reserving the construction joint position in the step S8 at the center line of the wall body, and overlapping the steel bars reserved at the roof cornice position by 100%.
As a preferable aspect of the present invention: and S12, erecting the supporting frame of the cornice template, wherein the length of the overhanging I-steel is 4.5m, the overhanging length is 1.7-1.75m, the anchoring length is 2.8m, the overhanging steel beam is made of 16# I-steel, the distance between vertical rods is not more than 1500mm, the step pitch is less than or equal to 1.8m, the safety rope is made of 14mm steel wire ropes, the steel wire ropes are pulled at intervals, and the steel wire ropes are installed and pulled after the strength of concrete at the upper pulling point reaches 75%.
Further: the cast-in-place outer wall adopts a mode of combining a screw rod and a steel pipe for use as a wall connecting piece of the single-row outer frame, the screw rod and the steel pipe are lapped in a welding mode, the welding length is not less than 200m, and double-sided lap welding is adopted, so that the defects of burning-through, arc pits and undercut and incomplete welding of a welding line are overcome.
As a further scheme of the invention: the pole setting interval that cornice formwork support set up is no longer than 1500mm, and the lateral distance is 750mm, and the step is no longer than 1500mm, and interior row pole setting and structure distance are no longer than 300mm, and when noting that the template was established, the eaves mouth adopted the shaping mode of many times, only was under the board of cornice that 120mm is thick under the construction for the first time.
As a still further scheme of the invention: the climbing frame is used as an operation platform erected by the cantilever frame, and after the climbing frame climbs downwards in place, part of the protective steel mesh sheets of the climbing frame are detached.
As a still further scheme of the invention: in the process of erecting the aluminum formwork of the beam plate of the large roof layer, the roof structural layer is optimized, and the specific operation method comprises the following steps:
s61: changing the downward turning beam into the upward turning beam, wherein the reinforcing bars and the section size are not changed;
s62: reserving a cloud line range by the upturning beam, and performing secondary construction;
s63: if the thickness of the floor of the standard floor is larger than that of the floor of the roof, a wood template is arranged by padding, so that the net height of 33 layers of the building meets the original design requirement or the deviation lower than the original design standard height is within the standard allowable deviation range; the top elevation of the floor slab of the roof floor is uniformly increased by 30mm compared with the original design top elevation, and the thinnest floor slab is ensured to be not less than 120mm.
The beneficial effects of the invention are as follows:
1. in the process of constructing the large roof layer, the aluminum mould of the standard layer of the full cast-in-place outer wall structure can be fully utilized, and the construction efficiency and the construction speed can be effectively ensured because the construction method is consistent with that of the standard layer;
2. through finishing at roofing structure construction back, after the structure back of capping promptly, climb down and climb the frame and set up the layer to the frame of encorbelmenting, set up the platform as the frame of encorbelmenting again, set up the scaffold frame construction of encorbelmenting and cornice, do not hinder subsequent major structure construction simultaneously, roofing pergola, computer lab etc. can alternate the construction in advance, have shortened the time limit for a project, have practiced thrift the cost.
3. The plane layout of the large roof layer is optimized, part of the beams are adjusted to be upward-returning beams, the cornice is subjected to item throwing, aluminum templates of a standard layer are fully utilized during the construction of the large roof layer structure, and the utilization rate is 100%.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the application and to enable other features, objects, and advantages of the application to be more apparent. The drawings and their description illustrate the embodiments of the invention and do not limit it. In the drawings:
FIG. 1 is a schematic flow chart of a reverse construction method of a ground non-standard layer with a cornice of a full concrete outer wall structure provided by the invention.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the present application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as appropriate.
In addition, the term "plurality" shall mean two as well as more than two.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Example 1:
a reverse construction method of a ground non-standard layer with a cornice of a full concrete outer wall structure is shown in figure 1 and comprises the following steps:
s1: carrying out operations of line springing, anchor ring positioning and anchor ring embedding on a 32-layer roof structure of a building, and preparing construction for building an overhanging scaffold in the later period;
s2: pouring concrete on 32 layers of the building;
s3: after the concrete pouring is finished, the climbing frame is controlled to climb by utilizing the lifting equipment;
s4: binding reinforcing steel bars at 33 layers of wall columns of the building and embedding wood boxes for penetrating I-shaped steel;
s5: carrying out die assembly operation on 33 layers of wall column aluminum templates of the building;
s6: erecting an aluminum mould for the large roof layer beam slab;
s7: binding the reinforcing steel bars of the beam plate of the large roof layer and reserving cornice reinforcing steel bars;
s8: intercepting the cornice construction joint;
s9: pouring concrete into the beam plates within the range of the outer wall of the large roof layer;
s10: the climbing frame is used for climbing downwards by utilizing lifting equipment, and the climbing frame is used as an operation platform erected on the cantilever frame;
s11: i-shaped steel is erected on the overhanging layer, and an outer scaffold is erected and tied with a steel wire rope;
s12: erecting a support frame of the cornice template;
s13: and (5) binding steel bars to the cornice, and pouring concrete to the cornice.
This embodiment, through when being under construction to the non-standard layer, at first use aluminium mould and climb the frame and finish the structure construction within the outer wall scope of roof layer, the eaves scope outside the outer wall is got rid of the item temporarily, later stage will climb down the frame, as the platform of setting up the cantilever frame, then set up the cantilever frame construction and cornice solved and adopted aluminium mould + climbing frame + full cast-in-place outer wall system and non-standard layer to have the structure of encorbelmenting and can not adopt the aluminium mould, the difficult problem of climbing frame construction, carry out optimal design to the construction process before the major structure construction simultaneously, with the assurance aluminium mould, the climbing frame can promote the roof layer, furthest improves the aluminium mould, the climbing frame rate of utilization, after the roof layer construction is accomplished, set up the cantilever frame again and carry out the construction of non-standard layer node of encorbelmenting, to the roof computer lab, pergola stand isotructure can alternate in advance after the roof layer construction is accomplished, be favorable to saving cost, shorten, accord with energy-saving and environmental protection requirements.
Example 2:
a reverse construction method of a ground non-standard layer with a cornice of a full concrete outer wall structure is shown in figure 1 and comprises the following steps:
s1: carrying out operations of line springing, anchor ring positioning and anchor ring embedding on a 32-layer roof structure of a building, and preparing construction for building an overhanging scaffold in the later period;
s2: pouring concrete on 32 layers of the building;
s3: after the concrete pouring is finished, the climbing frame is controlled by utilizing lifting equipment to climb;
s4: binding reinforcing steel bars at 33 layers of wall columns of the building and embedding wood boxes for penetrating I-shaped steel;
s5: carrying out die assembly operation on the 33-layer wall column aluminum templates of the building;
s6: carrying out aluminum formwork erection on the large roof layer beam slab;
s7: binding the reinforcing steel bars of the beam plate of the large roof layer and reserving cornice reinforcing steel bars;
s8: intercepting the cornice construction joint;
s9: carrying out concrete pouring on the beam plates within the range of the outer wall of the large roof layer;
s10: the climbing frame is used for climbing downwards by utilizing lifting equipment and is used as an operation platform erected by the cantilever;
s11: i-shaped steel is erected on the overhanging layer, and an outer scaffold is erected and tied with a steel wire rope;
s12: erecting a support frame of the cornice template;
s13: and (5) binding steel bars to the cornice, and pouring concrete to the cornice.
Preferably, after the main structure is finished, the wall columns of 33 layers of the building are constructed by adopting aluminum moulds of standard layers in the construction process, and the beam plates of the large roof layer are constructed by adopting an aluminum-wood combined construction mode;
preferably, in the process of pre-embedding the I-steel wooden box, pre-embedding the wooden box with the wall thickness of 300 × 300 according to a drawing, and using the wooden box as a hole for penetrating and overhanging I-steel;
preferably, the I-steel specification adopts 16# I-steel;
furthermore, the roof cantilever frame is used as a supporting scaffold of the roof cornice, the outer frame is a single-row scaffold, and the outermost row of scaffold is a single-row scaffold.
Example 3:
a reverse construction method of a ground non-standard layer with a cornice of a full concrete outer wall structure is shown in figure 1 and comprises the following steps:
s1: carrying out operations of line snapping, anchor ring positioning and anchor ring embedding on a 32-layer top plate structure of a building, and preparing construction for building an overhanging scaffold in the later period;
s2: pouring concrete on 32 layers of the building;
s3: after the concrete pouring is finished, the climbing frame is controlled to climb by utilizing the lifting equipment;
s4: binding reinforcing steel bars at 33 layers of wall columns of the building and embedding wood boxes for penetrating I-shaped steel;
s5: carrying out die assembly operation on the 33-layer wall column aluminum templates of the building;
s6: carrying out aluminum formwork erection on the large roof layer beam slab;
s7: binding the reinforcing steel bars of the beam plate of the large roof layer and reserving cornice reinforcing steel bars;
s8: intercepting the cornice construction joint;
s9: carrying out concrete pouring on the beam plates within the range of the outer wall of the large roof layer;
s10: the climbing frame is used for climbing downwards by utilizing lifting equipment, and the climbing frame is used as an operation platform erected on the cantilever frame;
s11: i-shaped steel is erected on the overhanging layer, and an outer scaffold is erected and tied with a steel wire rope;
s12: erecting a cornice template support frame;
s13: and (5) binding steel bars to the cornices, and pouring concrete to the cornices.
Preferably, the construction seam position in the step S8 is reserved at the center line of the wall, and the steel bars reserved at the roof cornice are lapped by 100%;
preferably, the climbing frame is used as an operation platform for erecting the cantilever frame, and after the climbing frame climbs down to the proper position, part of the protective steel meshes of the climbing frame are removed;
preferably, in the step S12, the overhanging beam is 4.5m in length, 1.7-1.75m in length, 2.8m in anchoring length, 16# beam is adopted as the overhanging beam, the distance between the vertical rods is not more than 1500mm, the step pitch is not more than 1.8m, 14mm steel wire ropes are adopted as the safety ropes, and the steel wire ropes are pulled one by one at intervals, and are installed and pulled after the concrete at the upper pulling point reaches 75% strength.
Preferably, the fully cast-in-place outer wall adopts a mode of combining a screw and a steel pipe for use as a wall connecting piece of the single-row outer frame, the screw and the steel pipe are overlapped in a welding mode, the welding length is not less than 200m, double-face lap welding is adopted, and the defects of burn-through, crater, undercut and incomplete welding of a welding seam are overcome;
furtherly, the pole setting interval of cornice formwork support setting up is no longer than 1500mm, and the lateral distance is 750mm, and the step is no longer than 1500mm, and interior row pole setting and structure distance are no longer than 300mm, and when noting that the template is propped up and establishing, the eaves mouth adopts many times of shaping modes to carry out the shaping, only constructs the board bottom of cornice that 120mm is thick for the first time.
Example 4:
a reverse construction method of a ground non-standard layer with a cornice of a full concrete outer wall structure is shown in figure 1 and comprises the following steps:
s1: carrying out operations of line springing, anchor ring positioning and anchor ring embedding on a 32-layer roof structure of a building, and preparing construction for building an overhanging scaffold in the later period;
s2: pouring concrete on 32 layers of the building;
s3: after the concrete pouring is finished, the climbing frame is controlled by utilizing lifting equipment to climb;
s4: binding reinforcing steel bars at 33 layers of wall columns of the building and embedding wood boxes for penetrating I-shaped steel;
s5: carrying out die assembly operation on the 33-layer wall column aluminum templates of the building;
s6: carrying out aluminum formwork erection on the large roof layer beam slab;
s7: binding steel bars of a girder plate of a large roof layer and reserving cornice steel bars;
s8: intercepting the cornice construction joint;
s9: pouring concrete into the beam plates within the range of the outer wall of the large roof layer;
s10: the climbing frame is used for climbing downwards by utilizing lifting equipment, and the climbing frame is used as an operation platform erected on the cantilever frame;
s11: i-shaped steel is erected on the overhanging layer, and an outer scaffold is erected and tied with a steel wire rope;
s12: erecting a support frame of the cornice template;
s13: and (5) binding steel bars to the cornices, and pouring concrete to the cornices.
Further, in the process of erecting the large roof layer beam slab aluminum formwork, the roof structure layer is optimized, and the specific operation method comprises the following steps:
s61: changing the downward turning beam into the upward turning beam, wherein the reinforcing bars and the section size are not changed;
s62: reserving a cloud line range by the upturning beam, and performing secondary construction;
s63: if the thickness of the floor slab of the standard floor is larger than that of the floor slab of the roof, a wood template is arranged by padding, so that the net height of 33 layers of the building meets the original design requirement or the deviation lower than the original design standard height is within the standard allowable deviation range; the top elevation of the floor slab of the roof layer is uniformly increased by 30mm compared with the original design top elevation, and the thinnest floor slab is ensured not to be lower than 120mm.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A reverse construction method of a ground nonstandard layer of a full concrete outer wall structure with cornices is characterized by comprising the following steps:
s1: carrying out operations of line springing, anchor ring positioning and anchor ring embedding on a 32-layer roof structure of a building, and preparing construction for building an overhanging scaffold in the later period;
s2: pouring concrete on 32 layers of the building;
s3: after the concrete pouring is finished, the climbing frame is controlled to climb by utilizing the lifting equipment;
s4: binding reinforcing steel bars at 33 layers of wall columns of the building and embedding wood boxes for penetrating I-shaped steel;
s5: carrying out die assembly operation on the 33-layer wall column aluminum templates of the building;
s6: erecting an aluminum mould for the large roof layer beam slab;
s7: binding steel bars of a girder plate of a large roof layer and reserving cornice steel bars;
s8: intercepting the cornice construction joint;
s9: carrying out concrete pouring on the beam plates within the range of the outer wall of the large roof layer;
s10: the climbing frame is used for climbing downwards by utilizing lifting equipment, and the climbing frame is used as an operation platform erected on the cantilever frame;
s11: i-shaped steel is erected on the overhanging layer, and an outer scaffold is erected and tied with a steel wire rope;
s12: erecting a support frame of the cornice template;
s13: and (5) binding steel bars to the cornices, and pouring concrete to the cornices.
2. The method for reverse construction of the overground nonstandard layer with cornice of the full concrete external wall structure according to claim 1, characterized in that in the construction process of 33 layers of the building, wall columns are constructed by adopting aluminum molds of standard layers, and beam plates of large roof layers are constructed by adopting an aluminum-wood combined construction mode.
3. The method for inversely constructing the overground nonstandard layer with the cornice of the full concrete outer wall structure according to claim 2, wherein the 33 layers of wall columns are embedded with wood boxes with the wall thickness of 300 x according to a drawing in the process of embedding the I-steel wood boxes, and the wood boxes are used as holes for penetrating and overhanging the I-steel.
4. The method for reverse construction of the overground nonstandard layer with cornice of the full concrete outer wall structure according to claim 3, wherein the roof cantilever frame is used as a support scaffold of the cornice of the roof, the outer frame is a single-row scaffold, and the outermost row of scaffolds is a single-row scaffold.
5. The method for reverse construction of the overground nonstandard layer with the cornice of the full concrete outer wall structure according to claim 4, wherein the construction seam position in the step S8 is reserved at the center line of the wall body, and the reinforcing steel bars reserved at the cornice of the roof are overlapped by 100%.
6. The method for reverse construction of the overground nonstandard layer with the cornice of the full concrete outer wall structure according to claim 5, characterized in that the cornice formwork support frame in the step S12 is erected, wherein the length of the overhanging I-steel is 4.5m, the overhanging length is 1.7-1.75m, the anchoring length is 2.8m, the overhanging steel beam is made of 16# I-steel, the distance between the vertical rods is not more than 1500mm, the step distance is not more than 1.8m, the safety rope is made of 14mm steel wire ropes, and the steel wire ropes are installed and tied at intervals after the strength of concrete at the upper pulling point reaches 75%.
7. The method for reverse construction of the overground nonstandard layer with cornice of the full concrete outer wall structure according to claim 6, characterized in that a mode of combining a screw rod and a steel pipe is adopted at the full cast-in-place outer wall as a wall connecting piece of a single-row outer frame, the screw rod and the steel pipe are overlapped in a welding mode, the welding length is not less than 200m, and double-sided lap welding is adopted, so that the defects of burning-through, arc pits, undercut and incomplete welding of the welding line cannot be caused.
8. The method for reverse construction of the overground nonstandard layer with cornice of the full concrete external wall structure according to claim 7, characterized in that the cornice formwork frames are erected with the vertical rods at intervals of not more than 1500mm, the transverse distance is 750mm, the step distance is not more than 1500mm, the distance between the inner row vertical rods and the structure is not more than 300mm, when the formwork is supported, the cornice is formed in a multi-forming mode, and only the cornice bottom with the thickness of 120mm is constructed for the first time.
9. The method for reverse construction of the overground nonstandard layer with the cornice of the full concrete external wall structure according to claim 8, characterized in that the climbing frame is used as an operation platform for erecting the cantilever frame, and after the climbing frame climbs in place, the protective steel mesh sheets of part of the climbing frame are removed.
10. The method for inversely constructing the overground nonstandard layer with the cornice of the full-concrete outer wall structure according to claim 9, wherein the method is optimized for a roof structure layer in the process of erecting a beam-slab aluminum mould of a large roof layer, and comprises the following specific operation steps:
s61: changing the downward turning beam into the upward turning beam, wherein the reinforcing bars and the section size are not changed;
s62: reserving a cloud line range by the upturning beam, and performing secondary construction;
s63: if the thickness of the floor of the standard floor is larger than that of the floor of the roof, a wood template is arranged by padding, so that the net height of 33 layers of the building meets the original design requirement or the deviation lower than the original design standard height is within the standard allowable deviation range; the top elevation of the floor slab of the roof layer is uniformly increased by 30mm compared with the original design top elevation, and the thinnest floor slab is ensured not to be lower than 120mm.
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