CN107035130A - Single column high-altitude operation platform and outrigger platform - Google Patents

Single column high-altitude operation platform and outrigger platform Download PDF

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Publication number
CN107035130A
CN107035130A CN201710415950.4A CN201710415950A CN107035130A CN 107035130 A CN107035130 A CN 107035130A CN 201710415950 A CN201710415950 A CN 201710415950A CN 107035130 A CN107035130 A CN 107035130A
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CN
China
Prior art keywords
construction
platform
single column
altitude operation
column high
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710415950.4A
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Chinese (zh)
Inventor
徐永选
张华亮
周杰
朱天送
梁波
邓锐
焦朗
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China Construction Second Engineering Bureau Co Ltd
China Construction Second Bureau Installation Engineering Co Ltd
Original Assignee
China Construction Second Engineering Bureau Co Ltd
China Construction Second Bureau Installation Engineering Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by China Construction Second Engineering Bureau Co Ltd, China Construction Second Bureau Installation Engineering Co Ltd filed Critical China Construction Second Engineering Bureau Co Ltd
Priority to CN201710415950.4A priority Critical patent/CN107035130A/en
Publication of CN107035130A publication Critical patent/CN107035130A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • E04G3/00Scaffolds essentially supported by building constructions, e.g. adjustable in height
    • E04G3/24Scaffolds essentially supported by building constructions, e.g. adjustable in height specially adapted for particular parts of buildings or for buildings of particular shape, e.g. chimney stacks or pylons
    • E04G3/243Scaffolds essentially supported by building constructions, e.g. adjustable in height specially adapted for particular parts of buildings or for buildings of particular shape, e.g. chimney stacks or pylons following the outside contour of a building

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)

Abstract

The invention provides a kind of single column high-altitude operation platform, it is related to single column high-altitude operation platform technical field of construction, single column high-altitude operation platform includes construction platform and support component, avoidance hole is provided with the construction platform, columnar buildings are passed through from the avoidance hole, surface construction of the workman in the construction platform;The support component is arranged on the bottom surface of the construction platform, and the column of the support component and columnar buildings is detachably connected.Single column high-altitude operation platform of the application, it is big to solve the quantities for setting up scaffold that columnar buildings in the prior art exist in construction, the technical problem of long construction period.Include the outrigger platform of above-mentioned single column high-altitude operation platform present invention also offers a kind of.

Description

Single column high-altitude operation platform and outrigger platform
Technical field
The present invention relates to single column high-altitude operation platform technical field of construction, more particularly, to a kind of single column high-altitude application Platform.The invention further relates to a kind of outrigger platform with above-mentioned single column high-altitude operation platform.
Background technology
Marker post, also known as LOGO posts, its main function are to embody oneself culture, attract people to note, are identified in addition, also having The effect of geographical location information.There is a kind of petal identification post in Wanda's cultural tour city, moulding is unique, identification degree is high, its profile As shown in Figure 1.Petal identification post includes moulding as the petal seat 400 of a flower that a bud just ready to burst, and the lower section of petal seat is high Towering column 401, column is used to raise petal height, makes petal seat that far place can be allowed people can be allowed to notice.Petal seat 400 Upside Sign Board 402 can be set, Sign Board is displayed for geographical location information.
But, existing construction method is in the construction of petal identification post, and quantities is big, long in time limit.Existing construction party Method is sets up scaffold, and scaffold building is in the outside of petal identification post.Scaffold refers to job site for operative and solved The various supports for vertically and horizontally transporting and setting up.For profile is the such building of petal seat, the petal at the top of it Seat have it is larger extend out, be unfavorable for building in scaffold, scaffold building that support body changes of section is big, quantities is big, difficulty of construction Greatly, security is poor, therefore setting up for scaffold can consume a large amount of manpower and materials, and operation difficulty is big, and safety coefficient is low, while its Dismounting is equally wasted time and energy.
In practice of construction, the class building similar to petal identification post is referred to as extending out building, i.e. top tape at the top of single pile There is a larger structure that extends out, and it is big to extend out the change of the sectional dimension and shape of structure, entirely extends out structure only with a branch Dagger is supported.To sum up, how construction task is safely completed into such work again on the premise of cost, quickening progress is reduced Journey, is those skilled in the art's urgent problem to be solved.
Based on this, the invention provides a kind of single column high-altitude operation platform to solve above-mentioned technical problem.
The content of the invention
It is an object of the invention to provide a kind of single column high-altitude operation platform, with alleviate top in the prior art carry compared with The quantities for setting up scaffold that the big columnar buildings for extending out structure exist in construction is big, difficulty of construction is big, security is poor, The technical problem of long construction period.
Set on single column high-altitude operation platform that the present invention is provided, including construction platform and support component, the construction platform There is avoidance hole, columnar buildings are passed through from the avoidance hole, surface construction of the workman in the construction platform;The support component The bottom surface of the construction platform is arranged on, the column of the support component and columnar buildings is detachably connected.
Further, the surface of the construction platform includes network structure and laying layer, and the laying layer is arranged on the net The upside of shape structure.
Further, the network structure include multiple annular rings and multiple connecting rods, multiple annular rings by it is interior to Outer arranged for interval, diameter increases successively;Multiple annular rings are connected by the connecting rod.
Further, edge of the one end of each connecting rod with the avoidance hole is connected, the other end and outermost Annular ring connection.
Further, the radial arrangement of multiple connecting rods.
Further, the angle between two adjacent connecting rods is 30 °.
Further, annular ring is provided with three.
Further, the support component includes hound and bearing, one end of the hound and the construction platform Bottom surface is hinged, and the other end is provided with the bearing;It is provided with the outside of the column of columnar buildings outside anchor ear, the anchor ear It is provided with attachment lug week, the attachment lug is spirally connected with the bearing and/or the construction platform.
Further, the hound and the bearing are hinged.
Single column high-altitude operation platform that the present invention is provided, at the construction field (site) in use, needing only to according to operating mode Single column high-altitude operation platform is set up, is then connected it with the column portion of cylindricality or tower-shaped building.By cylindricality The outer crosshead of building and top, which extend out structure operation frame and is divided into two parts, sets up, and compared with prior art, is surrounded without expansion The outer ring scaffold of columnar buildings, top petal crosshead is individually set up in construction steel platform.Alleviate outside single-column top Expand support body changes of section in structure scaffold building big, greatly, difficulty of construction is big for quantities, the problems such as security is poor.
The outrigger platform that the present invention is provided, including single column high-altitude operation platform described in any of the above-described, are applied described Work edge of table is disposed with a circle guard rail.Because single column high-altitude operation platform has above-mentioned technique effect, with single column The outrigger platform of high-altitude operation platform should also have corresponding technique effect.
Based on this, single column high-altitude operation platform that the present invention is provided, it mounts and dismounts speed faster, easy to use, Simple operation, LOGO towers or other turriforms, the efficiency of columnar buildings are installed so as to improve, and shorten the duration.In addition, people Power material consumption is less, improves economic benefit.The present invention with installation and removal speed faster, is used than original technology Convenient, simple operation, efficiency of construction is high, and the construction period is short, and manpower, material consumption are few, the advantage of high financial profit.
Brief description of the drawings
, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical scheme of the prior art The accompanying drawing used required in embodiment or description of the prior art is briefly described, it should be apparent that, in describing below Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the schematic diagram of petal identification post;
Fig. 2 is the structural representation of single column high-altitude operation platform;
Fig. 3 is the structural representation of annular ring and single column high-altitude operation platform;
Fig. 4 is the structural representation of outrigger platform;
Fig. 5 is the partial enlarged drawing at A in Fig. 4;
Fig. 6 is the A direction views in Fig. 5;
Fig. 7 is the connection method schematic diagram of anchor ear.
Mark:100- construction platforms;101- network structures;102- annular rings;103- connecting rods;104- avoids hole; 200- support components;201- hounds;202- bearings;203- attachment lugs;204- anchor ears;205- connection sheets;206- Left anchor ear;The right anchor ears of 207-;208- connecting plates;300- guard rails;400- petals seat;401- columns;402- Sign Boards; 403- petal crossheads.
Embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described implementation Example is a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In the description of the invention, it is necessary to explanation, such as occur term " " center ", " on ", " under ", "left", "right", " vertical ", " level ", " interior ", " outer " etc., orientation or position relationship indicated by it are based on orientation shown in the drawings or position Relation, is for only for ease of the description present invention and simplifies description, rather than indicate or imply that the device or element of meaning must have There is specific orientation, with specific azimuth configuration and operation, therefore be not considered as limiting the invention.In addition, as occurred Term " first ", " second ", " the 3rd " are only used for describing purpose, and it is not intended that indicating or implying relative importance.
In the description of the invention, it is necessary to which explanation, unless otherwise clearly defined and limited, term " peace such as occurs Dress ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected, or integratedly Connection;Can be mechanical connection or electrical connection;Can be joined directly together, can also be indirectly connected to by intermediary, It can be the connection of two element internals.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition The concrete meaning of language in the present invention.
Embodiment one
The core of the present invention is to provide a kind of single column high-altitude operation platform, solves what columnar buildings existed in construction The quantities for setting up scaffold is big, the technical problem of long construction period.
As shown in figs 2-4, in the present embodiment there is provided a kind of single column high-altitude operation platform, single column is high Do-nothing operation platform includes being provided with avoidance hole 104, cylindricality building on construction platform 100 and support component 200, the construction platform 100 Thing is passed through from the avoidance hole 104, surface construction of the workman in the construction platform 100;The support component 200 is arranged on institute The bottom surface of construction platform 100 is stated, the column 401 of the support component 200 and columnar buildings is detachably connected.
Single column high-altitude operation platform that the present invention is provided, for building cylindricality or tower-shaped building, including is applied Work platform 100.Avoidance hole 104 is provided with construction platform 100, avoiding hole 104 is used to allowing the column 401 of cylindricality or tower-shaped building Partially pass through, workman builds the other structures for being located at the outside of column 401 on construction platform 100.The downside of construction platform 100 is provided with Support component 200, support component 200 is used for and the column 401 of cylindricality or tower-shaped building is detachably connected.
Single column high-altitude operation platform that the present invention is provided, for building cylindricality or tower-shaped building, especially The cylindricality or tower-shaped building of the single pile structure extended out with top.At the construction field (site) in use, needing only to according to operating mode Single column high-altitude operation platform is set up, is then connected it with the part of column 401 of cylindricality or tower-shaped building.With showing There is technology to compare, without expanding the outer ring scaffold around columnar buildings, top petal crosshead is single in construction steel platform Solely set up..Therefore, single column high-altitude operation platform that the present invention is provided, it mounts and dismounts speed faster, easy to use, behaviour Make convenient, LOGO towers or other turriforms, the efficiency of columnar buildings are installed so as to improve, shorten the duration.In addition, manpower Material consumption is less, improves economic benefit.
Based on this, the present invention is than original technology, and with installation and removal speed faster, easy to use, simple operation is applied Work efficiency high, the construction period is short, and manpower, material consumption are few, the advantage of high financial profit.
In such as Fig. 2, the alternative of the present embodiment, the surface of the construction platform 100 includes network structure 101 and laying Layer, the laying layer is arranged on the upside of the network structure 101.
Single column high-altitude operation platform that the present invention is provided, construction platform 100 is using network structure 101 and lays layer Structure, the intensity of network structure 101 is high and overall weight is light.In addition, network structure 101 and laying layer it is simple for assembly process, Operation is quick.
Preferably, the laying layer is at least one of mesh sheet, flitch, bamboo springboard.
Further, the network structure 101 includes multiple annular rings 102 and multiple connecting rods 103, multiple annulars The arranged for interval from inside to outside of circle 102, diameter increases successively;Multiple annular rings 102 are connected by the connecting rod 103.
Further, annular ring 102 is provided with three.
Further, edge of the one end of each connecting rod 103 with the avoidance hole 104 be connected, the other end and Outermost annular ring 102 is connected.
Further, the radial arrangement of multiple connecting rods 103.
Further, the angle between adjacent two connecting rods 103 is 30 °.
A kind of single column high-altitude operation platform that the present invention is provided, preferred structure is that annular ring 102 is built with cylindricality Build centered on the column 401 of thing, diameter increases successively, it is identical or other apart from arranged for interval every one section.Connecting rod 103 One end with avoid hole 104 be connected, the other end is connected with outermost annular ring 102.The radial arrangement of connecting rod 103, phase Angle between two adjacent connecting rods 103 is 30 °, and whole construction platform 100 is in the shape similar to cobweb.
Preferably, annular ring 102 and connecting rod 103 are welded.
Preferably, avoiding hole 104 and the arranged concentric of annular ring 102 of innermost layer.
Preferably, all equal arranged concentrics of annular ring 102.
Preferably, annular ring 102 and/or connecting rod 103 use shaped steel.
In such as Fig. 5-Fig. 7, the alternative of the present embodiment, the support component 200 includes hound 201 and bearing 202, the bottom surface of one end of the hound 201 and the construction platform 100 is hinged, and the other end is provided with the bearing 202;In post Anchor ear 204 is provided with the outside of the column of shape building, the periphery of the anchor ear is provided with attachment lug 203, the engaging lug Piece 203 is spirally connected with the bearing and/or the construction platform.
Preferably, the anchor ear includes left anchor ear 206 and right anchor ear 207, the left anchor ear 206 and the right anchor ear 207 middle part is provided with the arc section with being matched on the outside of the columns of columnar buildings, the left anchor ear and the right anchor ear Two ends are respectively arranged with connection sheet 205, and left anchor ear and the right anchor ear are spirally connected by the connection sheet 205.
Further, the hound 201 and the bearing 202 are hinged.
As shown in Figure 5-Figure 7, single column high-altitude operation platform that the present invention is provided, construction platform 100 is built by cylindricality The column 401 for building thing is built, and operating procedure is simple.In order to not destroy the column of columnar buildings, anchor ear is provided with the outside of it 204.The periphery of anchor ear is provided with attachment lug 203.
Anchor ear can be arranged at the avoidance hole of construction platform, can also be arranged on the junction of support component and column, made To be preferred, anchor ear is respectively provided with Liang Chu.As shown in fig. 7, when anchor ear is arranged at the avoidance hole of construction platform, the net on construction platform Connecting rod and annular ring in shape structure can be connected with anchor ear, preferably, connecting rod is connected with anchor ear.Construct platform and company Connected between lug piece using connecting plate 208, connecting plate 208 is a kind of conventional connected mode of steel construction.When anchor ear is arranged on During the junction of support component and column, bearing and anchor ear connection in support component.Certainly, the anchor ear uses left anchor ear 206 and right anchor ear 207 structure when, the connection sheet 205 at the two ends of the left anchor ear 206 and the right anchor ear 207 can also be same Shi Zuowei attachment lugs 203 are used.
Preferably, the hound 201 uses 140X6 shaped steel.
Preferably, the place of being spirally connected uses M32 bolt connections.
Embodiment two
The outrigger platform that Fig. 4 provides for another embodiment of the present invention;As shown in figure 4, the described of the present embodiment offer is encorbelmented Platform, is the further improvement of the outrigger platform provided embodiment one, and the technical scheme described by embodiment one also belongs to In the embodiment, description is not repeated in the technical scheme that embodiment one has been described above.
Specifically, as shown in figure 4, providing in the present embodiment any in a kind of outrigger platform, including embodiment one Single column high-altitude operation platform described in kind, a circle guard rail 300 is disposed with the edge of the construction platform 100.
Guard rail 300 is used to prevent workmen from falling, and prevents construction material and article from dropping.
Optionally, safe blanket net is set in the downside of the construction platform 100.
Safe blanket net is used to be further ensured that construction safety.When workman falls from single column high-altitude operation platform by mistake Wait, workman can be dropped on level of security blanket net, level of security blanket net can prevent workman from directly dropping into ground and injured; In addition, during workman carries out installation operation on single column high-altitude operation platform, single column high-altitude operation platform can be put into Some upper instruments, instrument may drop from single column high-altitude operation platform, and instrument can fall from single column high-altitude operation platform Fall on level of security blanket net, level of security blanket net can prevent instrument from falling down to pound below single column high-altitude operation platform Other staff, broken while being also possible to prevent instrument and dropping to ground from eminence.
The outrigger platform that the present embodiment is provided, is welded the network structure on the surface of construction platform 100 on the ground in advance 101, then hound 201 is spirally connected to the construction place absolute altitude of platform 100 with crane lifting, now single column high-altitude application is put down Platform is installed, and removes crane.Laying layer is then installed on construction platform 100, laying layer can use steel pipe mesh sheet, wood One or more in side and bamboo springboard.The bar of guard rail 300 is finally set up, and safety is set below construction platform 100 Blanket net.
The outrigger platform that the present embodiment is provided, when building this cylindricality of petal identification post or tower-shaped building, only Only need to set up single column high-altitude operation platform according to operating mode, then by its 401, column with cylindricality or tower-shaped building Divide connection.Compared with prior art, without expanding the outer ring scaffold around columnar buildings, top petal crosshead exists Individually set up in construction steel platform.It mounts and dismounts speed faster, easy to use, simple operation, improves efficiency of construction, shortens Duration.In addition manpower, material consumption are less, improve economic benefit.
Below exemplified by building petal identification post, illustrate the installation steps of the application.Petal mark includes moulding as one The petal seat 400 for the flower that a bud just ready to burst, the lower section of petal seat is towering column 401.Need to make when building petal seat 400 With petal crosshead 403.Fig. 1 is the schematic diagram of petal identification post, and outrigger platform uses steel construction, the construction of above-mentioned outrigger platform Step is as follows:
Step 1, the annular ring 102 for welding assembled steel construction at the scene;
Step 2, lift and the fixed above-mentioned network structure 101 spliced by annular ring 102 is installed;
Step 3, laying steel pipe mesh sheet, flitch, bamboo springboard etc.;
Step 4, setting guard rail 300, safe blanket net;
Step 5, top petal crosshead is set up on single column high-altitude operation platform;Petal crosshead.
Finally it should be noted that:Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations;To the greatest extent The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that:Its according to The technical scheme described in foregoing embodiments can so be modified, or which part or all technical characteristic are entered Row equivalent substitution;And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology The scope of scheme.

Claims (10)

1. a kind of single column high-altitude operation platform, for building columnar buildings, it is characterised in that including construction platform and support group Avoidance hole is provided with part, the construction platform, columnar buildings are passed through from the avoidance hole, table of the workman in the construction platform Surface construction;
The support component is arranged on the bottom surface of the construction platform, and the column of the support component and columnar buildings detachably connects Connect.
2. single column high-altitude operation platform according to claim 1, it is characterised in that the surface of the construction platform includes net Shape structure and laying layer, the laying layer are arranged on the upside of the network structure.
3. single column high-altitude operation platform according to claim 2, it is characterised in that the network structure includes multiple rings Shape circle and multiple connecting rods, multiple annular rings arranged for interval from inside to outside, diameter increase successively;Multiple annular rings are equal Connected by the connecting rod.
4. single column high-altitude operation platform according to claim 3, it is characterised in that one end of each connecting rod is equal It is connected with the edge in the avoidance hole, the other end is connected with outermost annular ring.
5. single column high-altitude operation platform according to claim 4, it is characterised in that multiple connecting rods are radial Arrangement.
6. single column high-altitude operation platform according to claim 5, it is characterised in that two adjacent connecting rods it Between angle be 30 °.
7. single column high-altitude operation platform according to claim 3, it is characterised in that annular ring is provided with three.
8. single column high-altitude operation platform according to claim 1, it is characterised in that the support component includes hound And bearing, the bottom surface of one end of the hound and the construction platform is hinged, and the other end is provided with the bearing;
Anchor ear is provided with the outside of the column of columnar buildings, the periphery of the anchor ear is provided with attachment lug, the connection Auricle is spirally connected with the bearing and/or the construction platform.
9. single column high-altitude operation platform according to claim 8, it is characterised in that the hound and bearing hinge Connect.
10. a kind of outrigger platform, it is characterised in that put down including single column high-altitude application described in claim any one of 1-9 Platform, a circle guard rail is disposed with the construction edge of table.
CN201710415950.4A 2017-06-05 2017-06-05 Single column high-altitude operation platform and outrigger platform Pending CN107035130A (en)

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CN201710415950.4A CN107035130A (en) 2017-06-05 2017-06-05 Single column high-altitude operation platform and outrigger platform

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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107558719A (en) * 2017-10-16 2018-01-09 中国二十二冶集团有限公司 For high-rise frame steel construction adjustable mobile operating platform and its construction method
CN111236607A (en) * 2020-01-16 2020-06-05 中铁二局集团有限公司 Super high-rise steel pipe column operating platform and dismounting and mounting method thereof
CN114525939A (en) * 2022-02-16 2022-05-24 中建七局国际工程建设有限公司 Assembled building used chooses net
WO2023046225A1 (en) * 2021-09-22 2023-03-30 Seilkonzeipt Gmbh & Co. Kg Suspended scaffold

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CN204299147U (en) * 2014-12-15 2015-04-29 重庆钢铁(集团)有限责任公司 The chimney top operating platform that a kind of construction cost is low
CN204552050U (en) * 2015-03-13 2015-08-12 北京市政建设集团有限责任公司 A kind of anchor ear bearing frame and scaffolding platform assembly
CN207260549U (en) * 2017-06-05 2018-04-20 中国建筑第二工程局有限公司 Single column high-altitude operation platform and outrigger platform

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EP2439356A1 (en) * 2010-10-06 2012-04-11 Audi AG Maintenance platform for a robot console
CN202730656U (en) * 2012-08-08 2013-02-13 中铁二十局集团第一工程有限公司 Double-beam-clamp triangular bracket for construction of highway bridge single-column pier bent cap
CN104032940A (en) * 2014-05-30 2014-09-10 江苏柏诚工程股份有限公司 Chimney flange work platform
CN204112234U (en) * 2014-09-24 2015-01-21 河南省公路工程局集团有限公司 Only pier stud bent cap monolithic list hoop bracket
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CN204552050U (en) * 2015-03-13 2015-08-12 北京市政建设集团有限责任公司 A kind of anchor ear bearing frame and scaffolding platform assembly
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107558719A (en) * 2017-10-16 2018-01-09 中国二十二冶集团有限公司 For high-rise frame steel construction adjustable mobile operating platform and its construction method
CN111236607A (en) * 2020-01-16 2020-06-05 中铁二局集团有限公司 Super high-rise steel pipe column operating platform and dismounting and mounting method thereof
WO2023046225A1 (en) * 2021-09-22 2023-03-30 Seilkonzeipt Gmbh & Co. Kg Suspended scaffold
CN114525939A (en) * 2022-02-16 2022-05-24 中建七局国际工程建设有限公司 Assembled building used chooses net

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