CN110512719B - Construction method of large-span interval corridor high-altitude formwork steel platform for high-rise residence - Google Patents

Construction method of large-span interval corridor high-altitude formwork steel platform for high-rise residence Download PDF

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Publication number
CN110512719B
CN110512719B CN201910754835.9A CN201910754835A CN110512719B CN 110512719 B CN110512719 B CN 110512719B CN 201910754835 A CN201910754835 A CN 201910754835A CN 110512719 B CN110512719 B CN 110512719B
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steel
corridor
template
frame
platform
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CN110512719A (en
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鲁开明
张俊
苏斌
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Nanjing Construction Group Co ltd
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Nanjing Construction Group Co ltd
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    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/0046Loggias
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G11/00Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/36Forms, 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
    • E04G11/48Supporting structures for shutterings or frames for floors or roofs
    • E04G11/50Girders, beams, or the like as supporting members for forms

Abstract

The invention relates to a construction method of a large-span interval gallery high-altitude formwork steel platform for a high-rise residence, which comprises the following steps: step 1: deeply designing and processing a steel platform; step 2: hoisting and anchoring the section steel girder; and step 3: mounting the profile steel secondary beam; and 4, step 4: the steel girder is obliquely supported; and 5: setting plane protection; step 6: erecting an external protection frame; and 7: erecting a template support frame; and 8: mounting a beam plate template; and step 9: binding the beam plate steel bars; step 10: pouring concrete; step 11: removing the template; step 12: decorative construction of the corridor; step 13: dismantling the peripheral protective frame; step 14: and (5) dismantling the steel beam. According to the technical scheme, the large-span section steel beams are used as main stress members of the supporting platform, a certain number of transverse connection section steel secondary beams are arranged among the section steel beams, and a complete and reliable structural construction formwork steel platform is formed.

Description

Construction method of large-span interval corridor high-altitude formwork steel platform for high-rise residence
Technical Field
The invention relates to a construction method, in particular to a construction method of a large-span interval type corridor high-altitude formwork steel platform for a high-rise residence, and belongs to the technical field of building industry.
Background
With the rapid development of domestic economy at present, the requirements of people on the residential needs are improved, the rapid construction of residential projects is promoted from the aspect of visitation, and more high-rise residential projects are rapidly pulled out according to the limitation of land resource supply. High-rise dwelling houses can provide the largest quantity of dwelling house supply in a limited area, and as the height of the dwelling houses increases, the design of a fire fighting access is more and more important, and the design requirement is more and more strict, so that in some high-rise dwelling houses, galleries of adjacent units are inevitably arranged, and according to the requirement of relevant provisions of fire protection regulations of building design, the galleries are not required to be arranged at each floor, and the partition can be arranged under the condition allowed by the regulations.
The design of the spaced corridor of the high-rise residence saves the construction cost of residence projects on the premise of meeting the requirements of various design documents, objectively increases the difficulty and the measure cost of the construction of the main structure of the high-rise residence, and also increases the safety risk during the construction of the main structure. The design of the compartmental corridor is typically high starting floor level, as exemplified by 18 stories of residential projects, where 12 and 15 stories are often designed with inter-unit corridors. The height of the building floor of the house is about 2.9 meters generally, the height of the floor of the 12 floors exceeds 30 meters, and a formwork support frame body exceeding 30 meters is erected according to the conventional main structure construction measures, so that the building has the advantages of high difficulty, long period, high cost, high risk and no general operability; therefore, a new solution to solve the above technical problems is urgently needed.
Disclosure of Invention
The invention provides a construction method of a high-altitude formwork steel platform of a large-span interval corridor of a high-rise residence, aiming at the problems in the prior art.
In order to achieve the purpose, the technical scheme of the invention is as follows, and the construction method for the high-altitude formwork steel platform of the large-span interval corridor of the high-rise residence is characterized by comprising the following steps of:
step 1: deeply designing and processing a steel platform;
step 2: hoisting and anchoring the section steel girder;
and step 3: mounting the profile steel secondary beam;
and 4, step 4: the steel girder is obliquely supported;
and 5: setting plane protection;
step 6: erecting an external protection frame;
and 7: erecting a template support frame;
and 8: mounting a beam plate template;
and step 9: binding the beam plate steel bars;
step 10: pouring concrete;
step 11: removing the template;
step 12: decorative construction of the corridor;
step 13: dismantling the peripheral protective frame;
step 14: and (5) dismantling the steel beam.
As a modification of the present invention, the step 1: the steel platform deepens design and processing, specifically as follows: according to the span and the width of the corridor in the design drawing and the sectional dimension of the structural beam plate, the section steel main beam and the section steel secondary beam of the high-altitude formwork steel platform are designed, the erection scheme of the support body of the structural beam plate template is adopted, the erection height and the width of the peripheral protection frame body are achieved, the plane arrangement and the outward-picking length of the section steel secondary beam are reasonably arranged, and the section steel main beam and the secondary beam with certain dimensions can be processed after the design is completed.
As a modification of the present invention, the step 2: shaped steel girder hoist and mount and anchor are specifically as follows:
the structural steel main beam is basically made of whole structural steel, a round steel lifting ring is welded at the lifting point of the structural steel, the structural steel main beam is hoisted by a tower crane and anchored in a frame column, and a double-channel steel bar anchor ring is arranged at the floor position; the shaped steel girder is installed in the outside of vestibule structure roof beam to avoid the main muscle of frame post, must not influence the normal construction of structure.
Before the section steel main beam is hoisted, the gravity center of the steel beam is carefully calculated, and clear marks are made on the member, and the hoisting point is selected during hoisting to ensure that the central lines of the hook and the member are on the same plumb line; after the tower crane is hoisted to the target position on site, the steel beam is confirmed to be in a hovering state, alignment adjustment is carried out by measuring personnel, and after the adjustment is completed, the steel beam can be completely put down by the tower crane.
As a modification of the present invention, the step 3: the installation of the profile steel secondary beam is characterized in that the profile steel secondary beam is positioned according to the positioning arrangement of the vertical rod of the support frame body of the corridor structure, and the profile steel secondary beam is connected with the profile steel main beam in a welding manner so as to ensure the safety of high altitude;
the step 4: shaped steel girder diagonal bracing sets up, specifically as follows, the selection for use of diagonal bracing member is at the reasonable lectotype of deepening design stage, and its root sets up in the side of vestibule lower floor frame construction post, at the pre-buried steel sheet in frame post side, diagonal bracing member root and pre-buried steel sheet welded connection, top and shaped steel girder welded connection, consider angle and the lower part operating space of structure atress, the angular control with the perpendicular between the diagonal bracing piece is about 30 degrees.
As a modification of the present invention, the step 5: the plane protection device is specifically arranged as follows, considering that the high-altitude formwork supporting platform is arranged at high altitude, and the safety of operation is the key, therefore, the batten back ridges are longitudinally arranged on the section steel secondary beam at equal intervals, the intervals are smaller than 200mm, and the formwork is fully paved on the section steel secondary beam to form a closed plane operation space.
As a modification of the present invention, the step 6: the outer protection frame is set up, specifically as follows, the outer protection frame is overhanging steel pipe scaffold, and the scaffold pole setting sets up on shaped steel secondary beam, sets up respectively with the template support body, during the major structure concrete is not pour, adopts horizontal member to do the interim drawknot with both sides double-row frame, ensures the stability of outer protection support body, and the width of outer protection frame sets up to 500 and adds 600mm wide, satisfies basic outer facade decoration construction can, other parameters refer to conventional outer scaffold.
As a modification of the present invention, the step 7: the formwork support frames are erected, specifically, as follows, a phi 48x2.8 steel pipe scaffold full-hall support frame is used as a beam-slab structure support system, two sides of a beam bottom are respectively provided with a vertical rod, wherein an inner vertical rod and a floor slab support frame body are shared, the center of the beam bottom is additionally provided with a vertical rod, and the distance between the vertical rods is not more than 0.9 x 0.9 m.
As a modification of the present invention, the step 8: the beam slab formwork is installed as follows: the beam templates are all 15mm thick by adopting nine clamping plates, the beam side molds are provided with phi 48x2.8 steel pipes for reinforcement, the cross sections of the battens used by the beam templates are 40 x 90mm, the distance between the battens at the bottom of the cross sections of the beam templates is 100mm, and the distance between the battens at the side surfaces of the cross sections of the beam templates is 250 mm. The distance between the battens at the bottom of the plate is not more than 250mm, and the joint end of the battens is not less than 200 mm.
As a modification of the present invention, the step 9: binding the beam plate reinforcing steel bars, namely binding the beam plate reinforcing steel bars after the acceptance of a beam plate supporting frame body is qualified, and performing insertion construction coordination of laying water and electricity pipelines in the process of binding the beam plate reinforcing steel bars;
step 10, concrete pouring, specifically, during concrete pouring, a tower crane hoisting hopper is adopted for pouring, concrete (400 mm high) in the two side beams is poured firstly, then the beam plates are integrally poured, and the beam parts are turned upwards for secondary pouring;
the step 11: and (3) removing the template, specifically comprising the following steps: and (3) removing the side beam templates 24 hours after the concrete pouring at the upturned part of the beam is finished, removing the bottom templates of the beam and the platform templates and the bent frames of the beam and the platform templates before the concrete pouring at the upper layer is tamped, directly adopting the modes of throwing, throwing and the like for the materials such as the templates, steel pipes and the like removed on site, and placing the materials on the ground after the materials are transferred up and down.
As a modification of the present invention, the step 12: after the corridor main body structure is finished, the working procedures are timely alternated to finish the installation of the guardrails on the two sides, finish the decoration construction of the plate bottom, the outer vertical surface and the floor surface and finish the finished product protection of the decoration finished surface;
the step 13: the peripheral protection frame is removed, specifically, before the peripheral protection frame is removed, the work of comprehensively checking the plate bottom, the outer vertical face decoration and the like of the corridor is completely finished, and the removal of the peripheral protection frame belongs to the special operation range and is performed by a scaffold worker who obtains a special work type on duty certificate. The finished product of the peripheral protection frame cannot be damaged in the process of dismantling the peripheral protection frame;
the step 14: dismantling the steel beam, which comprises the following steps: the structural steel secondary beam and the peripheral protective frame are removed at the same time, the structural steel main beam is lifted and transported by a tower crane when being removed, the structural steel main beam can be repeatedly used after being removed, and holes are reserved for the frame columns in time to recover after the steel beam is removed.
Compared with the prior art, the invention has the following technical effects: 1) the high-altitude formwork steel platform is a steel structure combined platform which provides a formwork support frame body for a high-altitude reinforced concrete structure and is also assembled at high altitude, the formwork platform takes a section steel beam as a main stress component, a transverse section steel secondary beam is arranged on the section steel beam, and the longitudinal and transverse section steel components form the high-altitude formwork steel platform together; 2) the arrangement of the inclined supports on the two sides of the lower layer of the section steel girder can effectively reduce the support reaction of the placing points at the two ends of the section steel girder, extend the span application range of the steel platform and increase the span application range of the steel platform; 3) the steel platform section steel main beam and the section steel secondary beam are both made of finished section steel with common specifications, shaping processing is not needed, and the steel platform self steel beam assembling processing manufacturing process is simple and the forming effect is good; 4) all components of the steel platform are assembled by hoisting on site, hoisting equipment can be a tower crane used on site, hoisting equipment does not need to be additionally adopted, and the dismantling stage can be implemented according to the scheme. The high-altitude formwork steel platform is convenient, rapid and safe to install and dismantle and efficient in construction, the profile steel components adopted by the steel platform are basically free of consumption and damage after being used once and dismantled, can be repeatedly recycled in the steel platform according to the development progress of a project, can also be recycled among multiple projects, and is controllable in overall cost; 5) the high-altitude formwork steel platform can be used universally in the height range of a conventional high-rise residence, is not additionally provided with other settings or accessories due to the increase of the height, is not influenced by sites, surrounding environments, the complexity of structural members and the like, only needs to correspondingly adjust various parameters and indexes of the platform according to the difference of project working conditions, and has flexible arrangement and strong applicability; 6) the high-altitude formwork steel platform is mainly applied to erection of a supporting frame body of a structural construction formwork of a corridor arranged at a certain height in a high-rise residence, and particularly can be used as an operation platform for structural construction of a plurality of corridors arranged at intervals respectively, and the advantages of independent arrangement can be further displayed. The method has certain applicability to the structural construction of various types of high-altitude connectors and high-altitude platforms; 7) the steel platform is a multipurpose steel platform, and in the steel platform, the corridor structure template supports an operation platform. The structural member template support vertical rod pieces are directly arranged on the transverse profile steel secondary beams, the profile steel secondary beams are distributed according to the intervals among the vertical rods, the profile steel secondary beams are clear in stress and high in reliability, and the support frame body is simple and convenient to erect and operate; secondly, the profile steel secondary beam is also used as a steel beam of a vertical rod placing point of the outer scaffold; the profile steel secondary beam is outwards extended to two sides by a certain width to serve as a stress placing point of the structural member operation outer protection frame, and the outer scaffold is integral; thirdly, the steel platform also provides operating space for the decoration in the later stage of the corridor.
Drawings
FIG. 1 is a plan view of a high-altitude formwork steel platform of the present invention;
FIG. 2 is a longitudinal sectional view of a high-altitude formwork steel platform;
FIG. 3 is a transverse section of the high-altitude formwork steel platform.
The specific implementation mode is as follows:
for the purpose of enhancing an understanding of the present invention, the present embodiment will be described in detail below with reference to the accompanying drawings.
Example 1: referring to fig. 1, a construction method for a high-rise residential building large-span interval corridor high-altitude formwork steel platform comprises the following steps:
step 1: deeply designing and processing a steel platform;
step 2: hoisting and anchoring the section steel girder;
and step 3: mounting the profile steel secondary beam;
and 4, step 4: the steel girder is obliquely supported;
and 5: setting plane protection;
step 6: erecting an external protection frame;
and 7: erecting a template support frame;
and 8: mounting a beam plate template;
and step 9: binding the beam plate steel bars;
step 10: pouring concrete;
step 11: removing the template;
step 12: decorative construction of the corridor;
step 13: dismantling the peripheral protective frame;
step 14: and (5) dismantling the steel beam.
The step 1: the steel platform deepens design and processing, specifically as follows: according to the span and the width of the corridor in the design drawing and the sectional dimension of the structural beam plate, the section steel main beam and the section steel secondary beam of the high-altitude formwork steel platform are designed, the erection scheme of the support body of the structural beam plate template is adopted, the erection height and the width of the peripheral protection frame body are achieved, the plane arrangement and the outward-picking length of the section steel secondary beam are reasonably arranged, and the section steel main beam and the secondary beam with certain dimensions can be processed after the design is completed.
The step 2: hoisting and anchoring a profile steel main beam, wherein the profile steel main beam is basically made of whole profile steel, a round steel hoisting ring is welded at the hoisting point of the profile steel, the profile steel main beam is hoisted by a tower crane and anchored in a frame column, and a double-channel steel bar anchor ring is arranged at the floor position; the shaped steel girder is installed in the outside of vestibule structure roof beam to avoid the main muscle of frame post, must not influence the normal construction of structure. Before the section steel main beam is hoisted, the gravity center of the steel beam is carefully calculated, and clear marks are made on the member, and the hoisting point is selected during hoisting to ensure that the central lines of the hook and the member are on the same plumb line; after the tower crane is hoisted to the target position on site, the steel beam is confirmed to be in a hovering state, alignment adjustment is carried out by measuring personnel, and after the adjustment is completed, the steel beam can be completely put down by the tower crane.
The step 3: the installation of the profile steel secondary beam is characterized in that the profile steel secondary beam is positioned according to the positioning arrangement of the vertical rod of the support frame body of the corridor structure, and the profile steel secondary beam is connected with the profile steel main beam in a welding manner so as to ensure the safety of high altitude;
the step 4: shaped steel girder diagonal bracing sets up, specifically as follows, the selection for use of diagonal bracing member is at the reasonable lectotype of deepening design stage, and its root sets up in the side of vestibule lower floor frame construction post, at the pre-buried steel sheet in frame post side, diagonal bracing member root and pre-buried steel sheet welded connection, top and shaped steel girder welded connection, consider angle and the lower part operating space of structure atress, the angular control with the perpendicular between the diagonal bracing piece is about 30 degrees.
The step 5: the plane protection device is specifically arranged as follows, considering that the high-altitude formwork supporting platform is arranged at high altitude, and the safety of operation is the key, therefore, the batten back ridges are longitudinally arranged on the section steel secondary beam at equal intervals, the intervals are smaller than 200mm, and the formwork is fully paved on the section steel secondary beam to form a closed plane operation space.
The step 6: the outer protection frame is set up, specifically as follows, the outer protection frame is overhanging steel pipe scaffold, and the scaffold pole setting sets up on shaped steel secondary beam, sets up respectively with the template support body, during the major structure concrete is not pour, adopts horizontal member to do the interim drawknot with both sides double-row frame, ensures the stability of outer protection support body, and the width of outer protection frame sets up to 500 and adds 600mm wide, satisfies basic outer facade decoration construction can, other parameters refer to conventional outer scaffold.
The step 7: the formwork support frames are erected, specifically, as follows, a phi 48x2.8 steel pipe scaffold full-hall support frame is used as a beam-slab structure support system, two sides of a beam bottom are respectively provided with a vertical rod, wherein an inner vertical rod and a floor slab support frame body are shared, the center of the beam bottom is additionally provided with a vertical rod, and the distance between the vertical rods is not more than 0.9 x 0.9 m.
The step 8: the beam slab formwork is installed as follows: the beam templates are all 15mm thick by adopting nine clamping plates, the beam side molds are provided with phi 48x2.8 steel pipes for reinforcement, the cross sections of the battens used by the beam templates are 40 x 90mm, the distance between the battens at the bottom of the cross sections of the beam templates is 100mm, and the distance between the battens at the side surfaces of the cross sections of the beam templates is 250 mm. The distance between the battens at the bottom of the plate is not more than 250mm, and the joint end of the battens is not less than 200 mm.
The step 9: binding the beam plate reinforcing steel bars, namely binding the beam plate reinforcing steel bars after the acceptance of a beam plate supporting frame body is qualified, and performing insertion construction coordination of laying water and electricity pipelines in the process of binding the beam plate reinforcing steel bars;
step 10, concrete pouring, specifically, during concrete pouring, a tower crane hoisting hopper is adopted for pouring, concrete (400 mm high) in the two side beams is poured firstly, then the beam plates are integrally poured, and the beam parts are turned upwards for secondary pouring;
the step 11: and (3) removing the template, specifically comprising the following steps: and (3) removing the side beam templates 24 hours after the concrete pouring at the upturned part of the beam is finished, removing the bottom templates of the beam and the platform templates and the bent frames of the beam and the platform templates before the concrete pouring at the upper layer is tamped, directly adopting the modes of throwing, throwing and the like for the materials such as the templates, steel pipes and the like removed on site, and placing the materials on the ground after the materials are transferred up and down.
The step 12: after the corridor main body structure is finished, the working procedures are timely alternated to finish the installation of the guardrails on the two sides, finish the decoration construction of the plate bottom, the outer vertical surface and the floor surface and finish the finished product protection of the decoration finished surface;
the step 13: the peripheral protection frame is removed, specifically, before the peripheral protection frame is removed, the work of comprehensively checking the plate bottom, the outer vertical face decoration and the like of the corridor is completely finished, and the removal of the peripheral protection frame belongs to the special operation range and is performed by a scaffold worker who obtains a special work type on duty certificate. The finished product of the peripheral protection frame cannot be damaged in the process of dismantling the peripheral protection frame;
the step 14: dismantling the steel beam, which comprises the following steps: the structural steel secondary beam and the peripheral protective frame are removed at the same time, the structural steel main beam is lifted and transported by a tower crane when being removed, the structural steel main beam can be repeatedly used after being removed, and holes are reserved for the frame columns in time to recover after the steel beam is removed.
The application example is as follows: this scheme has been tried in the experimental stage, and the corridor structure floor substructure construction is accomplished the back, vertically sets up two I-steel along the corridor and shelves in the structure floor, and the I-steel anchor transversely sets up the I-steel secondary beam in frame construction post, and horizontal girder steel arranges the interval and supports the pole setting interval for the corridor template, indulges and adopts welded connection between the horizontal girder steel to ensure steel platform overall stability. Welding the positioning steel bars on the profile steel secondary beam according to the positions of the vertical rods, and inserting the vertical rods on the profile steel secondary beam to ensure the high-altitude stability of the formwork support frame. The high-altitude formwork steel platform plane layout is shown in a figure 1, the section steel main beam is welded with a lifting ring at a lifting point, the integral hoisting installation of a tower crane is adopted, an operator can accurately adjust and position the lower-layer outer frame and the finished floor, the section steel main beam is arranged in the outer side of the finished surface of the framework beam of the corridor in a plane manner, and the lifting can be conveniently removed after the structure is finished. The lower part of the longitudinal steel beam is provided with two oblique supporting rods, so that the clear span of the longitudinal steel beam is reduced, and the bearing capacity of the longitudinal steel beam is improved. The inclined support rods are arranged by adopting I-shaped steel and are welded with the longitudinal steel beams, steel plate embedded parts are embedded in the side faces of the lower-layer structural columns, and the inclined support rods are welded with the steel plate embedded parts. The vertical included angle between the inclined support rod piece and the building is about 30 degrees, and the operation width of the outer scaffold is considered. The longitudinal section of the high-altitude formwork steel platform is shown in detail in figure 2. The template support frame body of vestibule structure directly supports on the shaped steel secondary beam to according to the distribution that supports the frame body pole setting, the plane of location shaped steel secondary beam on the shaped steel girder arranges the interval, and welds the location muscle on the shaped steel secondary beam according to the point location that the pole setting set up. The peripheral scaffold frame of protecting of vestibule uses shaped steel secondary beam as shelving the point equally, sets up with the floor is synchronous, satisfies the safety protection requirement, and the width of protection support body suitably reduces, and it can to satisfy basic operation. The transverse section of the high-altitude formwork steel platform is shown in detail in figure 3, and after the construction of the main structure of the corridor is completed, the formwork support frame body can be detached and cleaned. The high-altitude formwork steel platform keeps the original state, can be used as an operation platform for subsequent decorative operation of the corridor, and can be detached after the detachment of the outer protective frame body of the corridor is completed. When the steel section secondary beam and the steel section main beam are dismantled, the steel section secondary beam and the steel section main beam can be lifted and transported by a tower crane and can be recycled for use for many times.
The application of the construction method of the high-altitude formwork steel platform of the large-span interval corridor of the high-rise residential building obviously reduces the operation difficulty, improves the efficiency of field construction and improves the safety in the operation process on the premise of ensuring the reliability of the erection of a structural member supporting system, compared with the conventional floor scaffold construction mode, the construction method has the advantages that the material, labor and other aspects are comprehensively input, the consumption can be saved by 30%, and the benefit is more obvious when the height of the corridor is higher. The application of the construction method of the high-altitude formwork steel platform of the large-span interval corridor of the high-rise residence is not only independent of various peripheral and base conditions of the building to which the high-altitude corridor belongs, but also can be universal for the corridor with any height, and particularly has more obvious applicability for the discontinuously arranged high-altitude corridor; the device also has certain universality for other various types of high-altitude fire fighting passages, overhanging components and the like.
It should be noted that the above-mentioned embodiments are not intended to limit the scope of the present invention, and all equivalent modifications and substitutions based on the above-mentioned technical solutions are within the scope of the present invention as defined in the claims.

Claims (6)

1. A construction method for a large-span interval corridor high-altitude formwork steel platform of a high-rise residence is characterized by comprising the following steps:
step 1: deeply designing and processing a steel platform;
step 2: hoisting and anchoring the section steel girder;
and step 3: mounting the profile steel secondary beam;
and 4, step 4: the steel girder is obliquely supported;
and 5: setting plane protection;
step 6: erecting an external protection frame;
and 7: erecting a template support frame;
and 8: mounting a beam plate template;
and step 9: binding the beam plate steel bars;
step 10: pouring concrete;
step 11: removing the template;
step 12: decorative construction of the corridor;
step 13: dismantling the peripheral protective frame;
step 14: dismantling the steel beam;
the step 1: the steel platform deepens design and processing, specifically as follows: selecting specifications of a section steel main beam and a section steel secondary beam of the high-altitude formwork steel platform are designed according to the span and width of a corridor and the section size of a structural beam plate in a design drawing, the plane arrangement and the overhanging length of the section steel secondary beam are reasonably arranged according to the erection scheme of a structural beam plate template support frame body and the erection height and width of a peripheral protection frame body, and the section steel main beam and the section steel secondary beam with certain sizes can be processed after the design is finished;
the step 2: the section steel girder is hoisted and anchored as follows
The structural steel main beam is made of whole structural steel, a round steel lifting ring is welded at the lifting point of the structural steel, the structural steel main beam is hoisted by a tower crane and anchored in a frame column, and a double-channel steel bar anchor ring is arranged at the floor position;
before the section steel main beam is hoisted, the gravity center of the steel beam is carefully calculated, and clear marks are made on the member, and the hoisting point is selected during hoisting to ensure that the central lines of the hook and the member are on the same plumb line; after the tower crane is hoisted to a target position on site, the steel beam is confirmed to be in a hovering state, alignment adjustment is carried out by a measurer, and the steel beam can be completely put down by the tower crane after the adjustment is completed;
the step 3: the installation of the profile steel secondary beam is characterized in that the profile steel secondary beam is positioned according to the positioning arrangement of the vertical rod of the support frame body of the corridor structure, and the profile steel secondary beam is connected with the profile steel main beam in a welding manner so as to ensure the safety of high altitude;
the step 4: the profile steel main beam is obliquely supported, specifically, a profile steel main beam is reasonably selected in a deepening design stage, the root of the profile steel main beam is arranged on the side surface of a lower-layer framework structure column of a corridor, a steel plate is embedded in the side surface of the framework column, the root of the oblique support rod is welded with the embedded steel plate, the top of the oblique support rod is welded with the profile steel main beam, and the angle between the oblique support rod and a vertical plane is controlled to be 30 degrees;
the step 5: the plane protection device is characterized in that wood square back ridges are longitudinally arranged on the section steel secondary beam at equal intervals, the interval is smaller than 200mm, and a template is fully paved on the wood square back ridges to form a closed plane operation space.
2. The construction method for the high-rise residential large-span spaced corridor high-altitude formwork steel platform according to claim 1, wherein the step 6: the outer protection frame is set up, specifically as follows, and the outer protection frame is the steel pipe scaffold frame of encorbelmenting, and the scaffold pole setting sets up on shaped steel secondary beam, supports the support body with the template and sets up respectively, does interim drawknot with both sides double-row frame at the major structure concrete during not pouring, adopts horizontal member to do the stability of outer protection support body, and the width of outer protection frame sets up to 500 and adds 600mm wide.
3. The construction method for the high-rise residential large-span spaced corridor high-altitude formwork steel platform according to claim 2, wherein the step 7: the formwork support frames are erected, specifically, as follows, a phi 48x2.8 steel pipe scaffold full-hall support frame is used as a beam-slab structure support system, two sides of a beam bottom are respectively provided with a vertical rod, wherein an inner vertical rod and a floor slab support frame body are shared, the center of the beam bottom is additionally provided with a vertical rod, and the distance between the vertical rods is not more than 0.9 x 0.9 m.
4. The construction method of the high-rise residential large-span spaced corridor high-altitude formwork steel platform according to claim 3, wherein the step 8: the beam slab formwork is installed as follows: the beam template is 15mm thick by adopting nine battens, the beam side mold is provided with phi 48x2.8 steel pipes for reinforcement, the cross section of a batten used by the beam template is 40 x 90mm, the space between battens at the bottom of the cross section of the beam template is 100mm, the space between battens at the side surface of the cross section of the beam template is 250mm, the space between the battens at the bottom of the plate is not more than 250mm, and the cross-over end of the battens is not less than 200 mm.
5. The construction method of the high-rise residential large-span spaced corridor high-altitude formwork steel platform according to claim 4, wherein the step 9: binding the beam plate reinforcing steel bars, namely binding the beam plate reinforcing steel bars after the acceptance of a beam plate supporting frame body is qualified, and performing insertion construction coordination of laying water and electricity pipelines in the process of binding the beam plate reinforcing steel bars; step 10, concrete pouring, specifically, during concrete pouring, a tower crane hoisting hopper is adopted for pouring, concrete in the two side beams is poured firstly, the height of the concrete is 400mm, then the beam plates are integrally poured, and the beam parts are turned upwards for secondary pouring;
the step 11: and (3) removing the template, specifically comprising the following steps: and (3) removing the beam side templates 24 hours after the concrete pouring of the upturned part of the beam is finished, removing the beam, the platform plate bottom moulds and the bent frames before the concrete pouring of the upper layer, directly adopting a throwing and throwing mode for the templates and the steel pipe materials which are removed on site, and placing the templates and the steel pipe materials on the ground after up-and-down transmission.
6. The construction method for the high-rise residential large-span spaced corridor high-altitude formwork steel platform according to claim 1, wherein the step 12: after the corridor main body structure is finished, the working procedures are timely alternated to finish the installation of the guardrails on the two sides, finish the decoration construction of the plate bottom, the outer vertical surface and the floor surface and finish the finished product protection of the decoration finished surface;
the step 13: the peripheral protection frame is dismantled, specifically, before the peripheral protection frame is dismantled, the decoration work of the plate bottom and the outer vertical surface of the corridor is comprehensively checked and finished,
the step 14: dismantling the steel beam, which comprises the following steps: the structural steel secondary beam and the peripheral protective frame are removed at the same time, the structural steel main beam is lifted and transported by a tower crane when being removed, the structural steel main beam can be repeatedly used after being removed, and holes are reserved for the frame columns in time to recover after the steel beam is removed.
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CN105649314A (en) * 2016-03-15 2016-06-08 中国建筑第六工程局有限公司 Suspension platform for high and long-span corridor construction
CN206329024U (en) * 2016-07-15 2017-07-14 中建三局第二建设工程有限责任公司 Hanging large-span steel-reinforced concrete structure construction steel platform
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JPH0565764A (en) * 1991-09-06 1993-03-19 Sekisui Chem Co Ltd Scaffold structure of building unit
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