CN111926911B - Construction method of super high-rise air corridor structure - Google Patents

Construction method of super high-rise air corridor structure Download PDF

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Publication number
CN111926911B
CN111926911B CN202010778036.8A CN202010778036A CN111926911B CN 111926911 B CN111926911 B CN 111926911B CN 202010778036 A CN202010778036 A CN 202010778036A CN 111926911 B CN111926911 B CN 111926911B
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China
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steel
construction
concrete
safety
corridor
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CN111926911A (en
Inventor
姜升强
姜帆
孙海友
朱闯
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China Third Metallurgical Group Co Ltd
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China Third Metallurgical 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
    • 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
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • 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
    • E04G21/00Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/32Safety or protective measures for persons during the construction of buildings

Abstract

The invention relates to a construction method of a super high-rise air corridor structure, which is characterized in that an overhanging platform is built on the next construction layer of the installation position of an air corridor, a steel structure beam is simultaneously hoisted by using the existing tower crane on the construction site and is fixedly connected with two adjacent tower buildings, an operation platform and safety rope protection are built on the steel structure beam, and finally construction such as formwork support, concrete pouring and the like of the air corridor is carried out by taking the steel structure beam as the foundation to complete the construction of the air corridor. The beneficial effects are as follows: 1) the problems that the corridor has large span, and the single piece of the structural member forming the overhead corridor has overlarge weight and is not suitable for integral hoisting after assembly are solved; 2) the hoisting cost can be saved by using the tower crane for site construction; 3) the full scaffold for overhead operation is not required to be erected, so that the construction safety factor is improved; 3) the operating platform has simple structure and simple and convenient manufacture and installation, and can effectively accelerate the construction speed; 4) the template scaffold is simple to construct, and the construction difficulty is reduced; 5) the safety protection system is simple, safe and reliable.

Description

Construction method of super high-rise air corridor structure
Technical Field
The invention relates to the technical field of steel-concrete structure construction, in particular to a construction method of a super high-rise air corridor structure.
Background
With the development of engineering construction, the level of engineering construction is increasing year by year. In order to show the originality and perfect conception of the architectural style, cases of applying the interconnection of the air galleries between adjacent buildings frequently appear in the aspects of planar layout, form composition, artistic processing, technique application and the like of the buildings in continuous innovation and change. At present, the traditional construction scheme of the cast-in-place reinforced concrete air corridor generally adopts a full hall scaffold to be erected to a construction floor, or adopts a method that a bidirectional hoisting device integrally hoists a precast concrete member to the construction floor, and has the following defects:
1) the space between adjacent buildings, especially high-rise buildings, is large, the corresponding corridor span is large, the weight of a single structural member forming the air corridor is too large, and the integral hoisting after the assembly is not suitable;
2) the setting height of the aerial corridor is generally very high, the difficulty in setting up the full scaffold for high-altitude operation is high, the stability is poor, and the safety coefficient is low;
3) the hoisting operation is complex and changeable, the consumption of manpower, material resources and financial resources is large, and the economic effect is poor.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a construction method of a super high-rise air corridor structure, which can effectively solve the problems in the background art by utilizing the existing mechanical equipment and protective materials in a construction site.
In order to achieve the purpose, the invention adopts the following technical scheme:
a construction method of a super high-rise air corridor structure is characterized by comprising the following steps:
1) mounting a cantilever platform: arranging a plurality of tripods on the outer wall of the concrete structure of the tower building on the next layer of the overhead corridor to be built at equal intervals, laying three groups (two in each group) of square steel keels along the outer detection section of the tripods, at least penetrating through three tripods and overlapping in a crossed manner, and laying 18mm thick wood plates on the square steel keels; a safety protection railing is inserted into a sleeve preset at the outermost end of each tripod extension, and every two safety protection railings are connected and reinforced by cross rods; a skirting board is arranged at the outer probing section of the tripod, and the skirting board is in flexible connection with a 18mm thick wood board;
similarly, the same overhanging platform is arranged on the outer wall of the concrete structure of the other tower at the same height;
2) mounting a steel structure beam: firstly, respectively standing on an overhanging platform by installers to fix a connecting plate on a tower concrete structure by adopting M20 embedded bolts; secondly, hoisting two ends of a prefabricated H-shaped steel structure beam respectively by using two tower cranes for tower construction, synchronously lifting the two ends to a mounting position, and fixing the steel structure beam and a connecting plate by using M20 high-strength bolts; thirdly, grouting and filling the gap between the connecting plate and the concrete structure of the tower building by grouting material; fourthly, similarly, a second steel structure beam and a third steel structure beam … … (a minimum of 2 steel structure beams) are installed; fifthly, connecting and reinforcing the steel structure beams at equal intervals by adopting a plurality of channel steels through M16 high-strength bolts;
3) and (3) protective installation of a safety rope: fixing a plurality of safety rope support frames on an upper wing plate of an I-shaped structure of a steel structure beam at intervals of 3m in pairs by adopting fastening bolts, wherein the safety ropes pass through safety rope through holes reserved on the safety rope support frames, and the two ends of each safety rope support frame are respectively fixed on a concrete structure of a tower building by adopting expansion bolts;
4) mounting a steel structure beam safety platform: uniformly paving a plurality of square steel keels on channel steel for connecting and reinforcing the steel structure beam, and paving a wood board with the thickness of 18mm on the square steel keels;
the overhanging platform, the safety rope protection and the steel structure beam safety platform form a safety protection system;
5) installing a template scaffold: the bottom template of the corridor concrete beam adopts an upper wing plate of a steel structure beam, and when the width of the upper wing plate of the steel structure beam is insufficient, a compensation position is built by using a common wood plate according to a conventional method; side template supports of the corridor concrete beam and plate template supports of the corridor concrete slab are constructed by adopting a conventional construction method, and scaffolds of the side template supports and the plate template supports are supported on a square steel keel of the steel structure beam safety platform;
6) pouring concrete: pumping concrete to a construction area by using a concrete pump truck, and pouring in a layered and segmented manner;
7) dismantling the formwork scaffold and the safety protection system: after the vestibule concrete is cured and meets the concrete strength, the template scaffold is dismantled according to the operation reverse to the installation, then the steel structure beam safety platform is dismantled, and the platform of encorbelmenting is dismantled at last.
The tripod is formed by welding square steel of 50mm multiplied by 50mm, the length of the long right-angle side of the tripod meets the requirement of the construction moving range, and the short right-angle side of the tripod is locked and fixed with a tower concrete structure by bolts by adopting a fixing device.
The channel steel is arranged on a lower wing plate of an I-shaped structure of the steel structure beam.
The safety rope support frame is of an F-shaped structure formed by welding 75mm angle steel and 75mm angle steel according to the width and the thickness of a wing plate on the steel structure beam.
Further, when the steel structure beam platform is installed, the square steel keels and the 18mm thick wood boards are sequentially and gradually paved together in the same direction; when the device is disassembled, the device is disassembled according to the reverse operation of the installation.
Furthermore, the steel structure beams and the channel steel are used as permanent structures to form a part of the corridor concrete structure, and the steel structure beams and the channel steel are not detached after the engineering is finished.
Compared with the prior art, the invention has the beneficial effects that:
1) the problems that the distance between adjacent buildings, particularly high-rise buildings, is large, the corresponding corridor span is large, and the single piece of structural members forming the aerial corridor is too heavy and is not suitable for integral hoisting after assembly are solved (the heavy aerial corridor structural members do not need to be prefabricated in advance);
2) the steel structure beam is hoisted by using the tower crane for the construction of the tower main body structure, so that the hoisting cost can be saved;
3) the full scaffold for overhead operation is not required to be erected, so that the construction safety factor is improved;
4) the operation platforms such as the cantilever platform, the steel structure beam platform and the like have simple structures, are simple and convenient to manufacture and install, and can effectively accelerate the construction speed;
5) the template scaffold of the air corridor concrete structure has simple engineering construction and reduces the construction difficulty;
6) the platform of encorbelmenting, steel construction roof beam safety platform and safety rope protection constitute the safety guarantee system, can satisfy safe construction requirement, construction safe and reliable.
Drawings
FIG. 1 is a schematic view of the construction plan of the air corridor of the present invention;
FIG. 2 is a schematic view of the construction elevation of the air corridor of the present invention;
FIG. 3 is a schematic view of the present invention showing the construction of the cantilever platform connected to the concrete structure of the tower;
FIG. 4 is a schematic structural view of the connection of the steel structural beam of the present invention with the concrete structure of the tower;
FIG. 5 is a schematic view of the structure of FIG. 4;
FIG. 6 is a schematic view of the connection structure of the steel structural beam and the channel steel of the present invention;
FIG. 7 is a schematic view of the connection structure of the safety rope support frame and the steel structural beam of the present invention;
fig. 8 is a schematic view of the structure in the direction C of fig. 7.
In the figure: 1-tower concrete structure 2-tripod 3-18mm thick wood plate 4-skirting board 5-safety protection railing 6-fixing device 7-safety rope support frame 8-fastening bolt 9-safety rope through hole 10-steel structural beam 11-square steel keel 12-channel steel 13-side template support 14-template support 15-vestibule concrete beam 16-vestibule concrete slab 17-M20 embedded bolt 18-connecting plate 19-M20 high-strength bolt 20-grouting material 21-M16 high-strength bolt 20
Detailed Description
The invention is further described with reference to specific examples, but without thereby limiting the scope of protection of the invention.
Referring to fig. 1 to 8, the construction method of the super high-rise air corridor structure according to the present invention includes the following steps:
1) mounting of overhanging platform (see fig. 3): a plurality of tripods 2 are arranged on the outer wall of a concrete structure 1 of a tower building on the next layer of the overhead corridor to be built at equal intervals, three groups (two in each group) of square steel keels 11 are laid along the outer detection sections of the tripods 2, each square steel keel 11 at least penetrates through three tripods 2 and is in cross lap joint, and a thick wood plate 3 with the thickness of 18mm is laid on each square steel keel 11; a safety guard rail 5 is inserted into a sleeve preset at the outermost end of each tripod 2, and the two dual-purpose cross rods are connected and reinforced between the safety guard rails 5; a skirting board 4 is arranged at the outer probing section of the tripod 2, and the skirting board 4 is in flexible connection with the 18mm thick wood board 3; the cantilever platform is made of materials and is coated with warning color paint;
similarly, the same overhanging platform is arranged on the outer wall of the concrete structure 1 of the other tower at the same height, so that the two towers can be constructed at the same time conveniently;
2) mounting the steel structure beam (see fig. 4, 5 and 6): firstly, respectively standing on an overhanging platform by an installer to fix a connecting plate 18 on a tower concrete structure 1 by using M20 embedded bolts 17; secondly, hoisting two ends of a prefabricated H-shaped steel structure beam 10 by using two tower cranes for tower construction respectively, synchronously lifting the two ends to a mounting position, and fixing the steel structure beam 10 and a connecting plate 18 by using M20 high-strength bolts 19; thirdly, grouting and filling the gap between the connecting plate 18 and the tower concrete structure 1 by grouting material 20; fourthly, similarly, a second steel structural beam 10 and a third steel structural beam 10 … … are installed (generally, at least 2 steel structural beams 10 are needed); fifthly, connecting and reinforcing the steel structure beams 10 at equal intervals by adopting a plurality of channel steels 12 through M16 high-strength bolts 21 (figure 6); the channel steel 12 and the steel structural beam 10 form a stable stress system;
3) safety rope protection installation (see fig. 7, 8): fixing a plurality of safety rope support frames 7 on an upper wing plate of an I-shaped structure of a steel structure beam 10 at intervals of 3m in pairs by using fastening bolts 8, wherein a safety rope (not shown in the figure) passes through a safety rope through hole 9 reserved on each safety rope support frame 7, and two ends of each safety rope support frame are respectively fixed on the tower concrete structure 1 by using expansion bolts;
4) mounting a steel structure beam safety platform: uniformly paving a plurality of square steel keels 11 on channel steel 12 connected with the reinforced steel structure beam 10, and paving a 18mm thick wood plate 3 on the square steel keels 11 to form a steel structure beam safety platform and provide an operation platform for scaffold template engineering, reinforced concrete pouring and the like;
the overhanging platform, the safety rope protection and the steel structure beam safety platform form a safety protection system;
5) installing a template scaffold: the bottom template of the corridor concrete beam 15 is replaced by the upper wing plate of the steel structure beam 10, and when the width of the upper wing plate of the steel structure beam 10 is insufficient, a repairing position is set up by using a common wood plate according to a conventional method so as to meet the width requirement of the corridor concrete beam 15; side template supports 13 of the corridor concrete beam 15 and plate template supports 14 of the corridor concrete slab 16 are constructed by adopting a conventional construction method, scaffolds of the side template supports 13 and the plate template supports 14 are supported on a square steel keel 11 of a steel structure beam safety platform and cannot be directly located on a 18mm thick wood plate 3 at the neutral position of the square steel keel 11 (the strength is not enough, and the safety is not high);
6) pouring concrete: pumping concrete to a construction area by using a concrete pump truck, pouring in a layered and segmented manner, and monitoring the stress deformation condition of the steel structure beam 10 and the safe operation platform in real time;
7) dismantling the formwork scaffold and the safety protection system: after the vestibule concrete is cured and meets the concrete strength, the template scaffold is dismantled according to the operation reverse to the installation, then the steel structure beam safety platform is dismantled, and the platform of encorbelmenting is dismantled at last.
The tripod 2 is formed by welding square steel of 50mm multiplied by 50mm, the length of the long right-angle side of the tripod is required to meet the requirement of the construction activity range, and the short right-angle side of the tripod 2 is locked and fixed with the tower concrete structure 1 by bolts by adopting a fixing device 6.
The channel steel 12 is arranged on the lower wing plate of the I-shaped structure of the steel structure beam 10.
The safety rope support frame 7 is welded into an F-shaped structure by using angle steel of 75mm multiplied by 75mm according to the width and the thickness of an upper wing plate of the steel structural beam 10.
Further, when the steel structure beam platform is installed, the square steel keels 11 and the 18mm thick wood plates 3 are sequentially and gradually paved together in the same direction; when the device is disassembled, the device is disassembled according to the reverse operation of the installation.
Further, the steel structural beam 10 and the channel steel 12 form a part of the corridor concrete structure as a permanent structure, and are not dismantled after the construction is completed.

Claims (6)

1. A construction method of a super high-rise air corridor structure is characterized by comprising the following steps:
1) mounting a cantilever platform: arranging a plurality of tripods on the outer wall of the concrete structure of the tower building on the next layer of the overhead corridor to be built at equal intervals, laying three groups of square steel keels along the outer detection section of each tripod, at least penetrating through the three tripods and overlapping in a crossed manner, and laying a 18mm thick wood plate on each square steel keel; a safety protection railing is inserted into a sleeve preset at the outermost end of each tripod extension, and every two safety protection railings are connected and reinforced by cross rods; a skirting board is arranged at the outer probing section of the tripod, and the skirting board is in flexible connection with a 18mm thick wood board;
similarly, the same overhanging platform is arranged on the outer wall of the concrete structure of the other tower at the same height;
2) mounting a steel structure beam: firstly, respectively standing on an overhanging platform by installers to fix a connecting plate on a tower concrete structure by adopting M20 embedded bolts; secondly, hoisting two ends of a prefabricated H-shaped steel structure beam respectively by using two tower cranes for tower construction, synchronously lifting the two ends to a mounting position, and fixing the steel structure beam and a connecting plate by using M20 high-strength bolts; thirdly, grouting and filling the gap between the connecting plate and the concrete structure of the tower building by grouting material; fourthly, similarly, mounting a second steel structure beam and a third steel structure beam, wherein the number of the steel structure beams is at least 2; fifthly, connecting and reinforcing the steel structure beams at equal intervals by adopting a plurality of channel steels through M16 high-strength bolts;
3) and (3) protective installation of a safety rope: fixing a plurality of safety rope support frames on an upper wing plate of an I-shaped structure of a steel structure beam at intervals of 3m in pairs by adopting fastening bolts, wherein the safety ropes pass through safety rope through holes reserved on the safety rope support frames, and the two ends of each safety rope support frame are respectively fixed on a concrete structure of a tower building by adopting expansion bolts;
4) mounting a steel structure beam safety platform: uniformly paving a plurality of square steel keels on channel steel for connecting and reinforcing the steel structure beam, and paving a wood board with the thickness of 18mm on the square steel keels;
the overhanging platform, the safety rope protection and the steel structure beam safety platform form a safety protection system;
5) installing a template scaffold: the bottom template of the corridor concrete beam adopts an upper wing plate of a steel structure beam, and when the width of the upper wing plate of the steel structure beam is insufficient, a compensation position is built by using a common wood plate according to a conventional method; side template supports of the corridor concrete beam and plate template supports of the corridor concrete slab are constructed by adopting a conventional construction method, and scaffolds of the side template supports and the plate template supports are supported on a square steel keel of the steel structure beam safety platform;
6) pouring concrete: pumping concrete to a construction area by using a concrete pump truck, and pouring in a layered and segmented manner;
7) dismantling the formwork scaffold and the safety protection system: after the vestibule concrete is cured and meets the concrete strength, the template scaffold is dismantled according to the operation reverse to the installation, then the steel structure beam safety platform is dismantled, and the platform of encorbelmenting is dismantled at last.
2. The construction method of the super high-rise air corridor structure according to the claim 1, wherein the tripod is welded by using 50mm x 50mm square steel, the length of the long right-angle side of the tripod meets the requirement of construction activity range, and the short right-angle side of the tripod is locked and fixed with a tower concrete structure by using bolts by adopting a fixing device.
3. The method for constructing a super high-rise air corridor structure according to claim 1, wherein the channel steel is arranged on a lower wing plate of an I-shaped structure of a steel structural beam.
4. The method as claimed in claim 1, wherein the safety rope support frame is welded to form an F-shaped structure according to the width and thickness of the upper wing plate of the steel structural beam using angle steel of 75mm x 75 mm.
5. The construction method of the super high-rise air corridor structure according to claim 1, wherein when the steel structure beam platform is installed, the square steel keels and the 18mm thick wood boards are sequentially and gradually laid together in the same direction; when the device is disassembled, the device is disassembled according to the reverse operation of the installation.
6. The method of claim 1, wherein the steel structural beams and the channel steel form part of the corridor concrete structure as a permanent structure, and are not removed after the construction is completed.
CN202010778036.8A 2020-08-05 2020-08-05 Construction method of super high-rise air corridor structure Active CN111926911B (en)

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CN112391949A (en) * 2020-11-25 2021-02-23 中交第二航务工程局有限公司 Large-span steel-concrete gallery bridge structure concrete crack control construction method

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JP5309798B2 (en) * 2008-08-29 2013-10-09 株式会社大林組 Beam form support structure, beam form support method, concrete placement method, column beam frame construction method
CN101886468B (en) * 2010-03-29 2011-08-24 南京大地建设集团有限责任公司 Construction method of suspension type template support in high-position conjoined structure
CN102444203B (en) * 2011-09-15 2013-06-19 浙江城建建设集团有限公司 High-altitude long-span overhanging corridor type reinforced concrete structure and construction method
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
CN207567965U (en) * 2017-10-13 2018-07-03 辽宁省建筑设计研究院有限责任公司 A kind of connection structure for connecting vestibule girder steel and agent structure
CN109025295A (en) * 2018-08-03 2018-12-18 中国十七冶集团有限公司 A kind of high-altitude long-span steel reinforced concrete corridor construction method
CN110512719B (en) * 2019-08-15 2021-07-20 南京建工集团有限公司 Construction method of large-span interval corridor high-altitude formwork steel platform for high-rise residence

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