CN104989092A - Construction method of high-altitude overhang superposition type steel truss bearing platform - Google Patents
Construction method of high-altitude overhang superposition type steel truss bearing platform Download PDFInfo
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- CN104989092A CN104989092A CN201510282733.3A CN201510282733A CN104989092A CN 104989092 A CN104989092 A CN 104989092A CN 201510282733 A CN201510282733 A CN 201510282733A CN 104989092 A CN104989092 A CN 104989092A
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Abstract
The invention discloses a construction method of a high-altitude overhang superposition type steel truss bearing platform. The construction method mainly comprises pre-embedding screw related members, locating hanging piles of a steel truss, mounting a detachable ballast plate, an additional ballast plate, a guide rail, an upper steel truss and a stay cable, and setting up a support system of a scaffold. The overhang construction bearing platform is higher in safety factor of a bearing system, and more conveniently to assemble and disassemble, the steel truss fully overcome detects of insufficient overhanging span of traditional I-steel, and the security of constructed structure can be greatly raised.
Description
Technical field
The present invention relates to a kind of construction method of steel truss bearing platform, particularly a kind of construction method of high-altitude overhanging superposed type steel truss bearing platform.
Background technology
In order to satisfied modern people are to the various using function of building and aesthetic, more and more futuramic project emerges in multitude, particularly take at the high longspan structure of encorbelmenting of tens meters, building rice even up to a hundred general especially in Gongjian's project in the air, traditional cantilevered structure construction bearing platform all adopts mostly to be set up full hall steel pipe scaffold or take pre-embedded steel slab (reinforcing bar) lower floor surface concrete structure from ground, or the on-the-spot shaped steel that adopts is encorbelmented or welds an assembled load-bearing operation platform.Although set up full hall steel pipe scaffold method of operating from ground easy, Force Calculation is directly perceived, but need in practice of construction to spend a large amount of circulation materials with artificial, and due to this type of support body apply to scaffolding height higher and bear working load and self load all larger situation time, the resistance to overturning of support body is often difficult to ensure, tall and big formwork support body easily occurs and to collapse quality accidents.Another kind of employing overhanging type steel bearing platform formwork system, its span of encorbelmenting is only applicable to 2 ~ 3 meters, the scope of application has its limitation, and need the various steel of at substantial, higher to Site Welding workman technical requirements, disposable input mostly as this kind of operation platform, not reproducible utilization, consumptive material of taking a lot of work.For the construction of highrise building cantilevered structure, and consider the weak point of above two kinds of construction methods, some units in charge of construction have employed steel truss to set up the bearing platform of cantilevered structure construction, this construction method makes full use of the frame column of original structure, pre-buried or installation ironware on frame column, connect steel truss by ironware, bearing platform is set.Cantilevered structure operation platform set up by novel steel truss no doubt many benefits, but steel truss itself may damage completing structure.
Summary of the invention
The construction method of bearing platform that the object of the present invention is to provide a kind of economy, convenience, safety, can reuse, can be effective to the construction of cantilevered structure.
For achieving the above object, technical scheme of the present invention is:
A construction method for high-altitude overhanging superposed type steel truss bearing platform, is characterized in that described bearing platform is primarily of bottom steel truss, upper steel truss, scaffold formwork system, pre-buried recoverable screw rod, local recoverable screw rod, guide rail, removable jointing plate, additional jointing plate, drag-line and structural column composition; Bottom steel truss is fixed on by pre-buried recoverable screw rod, local recoverable screw rod on the structural column of having constructed, and is connected with removable fixing jointing plate and additional jointing plate outside bottom steel truss; Upper steel truss utilizes bolt to weld and combines and is connected bottom steel truss with guide rail, between removable jointing plate and upper steel truss end, be provided with drag-line; Upper steel truss stretches out the bearing platform becoming top cantilevered structure scaffold formwork system outside structure;
The construction method of high-altitude overhanging superposed type steel truss bearing platform comprises following construction sequence:
Step one, screw rod associated part are pre-buried: before concrete construction, imbed PVC sleeve pipe and vertical anchorage screw, the screw hole of local recoverable screw rod in structural column of recoverable screw rod;
It is in place that step 2, steel truss hang stake: lifting bottom steel truss after concrete structural slab maintenance completes, and utilizes pre-buried recoverable screw rod and local recoverable screw rod to fix bottom steel truss;
Step 3, removable jointing plate, additional jointing plate are installed: be welded to connect removable jointing plate after the installation of bottom steel truss, according to the actual quantity determining additional jointing plate of engineering, additional jointing plate is arranged on removable jointing plate;
Step 4, guide rails assembling: guide rails assembling is at bottom steel truss top;
Step 5, upper steel truss installa-tion: on guide rail, insert upper steel truss, form embedded connection, connects upper steel truss and bottom steel truss after embedded connection completes by bolt weldering mode;
Step 6, drag-line are installed: between removable jointing plate and upper steel truss end, install drag-line;
Step 7, scaffold formwork system are set up: utilize upper steel truss to stretch out scaffold formwork system that structure division sets up cantilevered structure, and the section of stretching out steel truss is as the bearing platform of scaffold formwork system.
Described pre-buried recoverable screw rod is arranged in the concrete floor under bottom steel truss, be made up of PVC sleeve pipe, vertical anchorage screw and anchoring top board, PVC sleeve pipe is placed on outside vertical anchorage screw, and anchoring top board to be fixedly installed under bottom steel truss on boom plate by vertical anchorage screw and nut; Vertical anchorage screw is provided with direction hinge.Vertical anchorage screw in position can locate setting direction hinge, makes screw rod be easy to folding and unfolding.Lay down anchoring top board when steel truss is removed, can to dismantle easily whole anchoring fastener by rapping screw tip, can use be had enough to meet the need.
Described local recoverable screw rod, is arranged in the structural column near steel truss, is provided with bolt hole in structural column, and after steel truss installation, the screw rod be connected on steel truss is screwed in bolt hole.During dismounting, screw rod is removed, and bolt hole is stayed in structural column and do not removed.
Described removable jointing plate connects bottom steel truss and is placed on concrete floor, is connected by pre-buried recoverable screw rod with concrete floor, its role is to the heavy burden increasing bottom steel truss, avoids toppling and slippage of bottom steel truss.Additional jointing plate is concrete block, is placed on removable jointing plate, coordinates ballast.
Described guide rail is arranged at bottom steel truss upper string board, embedded connection upper steel truss, guide rail both sides are provided with pulley, upper steel truss utilizes the pulley in guide rail to realize sliding, for ensureing the safety of construction, the mode of bolt weldering is used to connect upper steel truss and bottom steel truss except connecting fit on guide rail.
Described drag-line, connect steel truss and removable jointing plate, drag-line one end is provided with termination and is embedded in removable jointing plate, and the other end connects steel truss system.Its object is to utilize existing structure to assist the load of carrying steel truss.
the present invention has the following advantages and beneficial effect:
1, this bearing platform can be better with bearing capacity, utilizes lighter steel truss to replace traditional i iron, not only ensure that the safety of structure, and various informative due to steel truss, is applicable to the cantilevered structure of large span.
2, this bearing platform major part is all detachable, can be re-used in multiple project, improve economic benefit.3, these load-carrying members are provided with the measure of multiple protection existing structure, avoid tradition and to encorbelment the destruction of bearing platform to existing structure.
accompanying drawing illustrates:
Fig. 1-steel truss bearing platform elevation.
Fig. 2-recoverable screw rod bar elevation.
Fig. 3-local recoverable screw rod elevation.
Fig. 4-guide rail elevation.
1-bottom steel truss; 2-upper steel truss; 3-scaffold formwork system; 4-concrete floor; Boom plate under 5-; 6-upper string board; 7-local recoverable screw rod; 8-guide rail; 9-recoverable screw rod; 10-structural column; 11-screw rod; The removable jointing plate of 12-; 13-adds jointing plate; 14-drag-line; 15-drag-line end plate; 16-screw rod bellend; 17-direction is cut with scissors; 18-anchoring top board; 19-nut; 20-screw rod; 21-PVC sleeve pipe; The removable screw rod of 22-; 23-screw hole; 24-pulley.
Detailed description of the invention
Present embodiment emphasis sets forth the design feature and effect that the present invention relates to, and coordinates accompanying drawing to be described in detail as follows:
High-altitude overhanging superposed type steel truss bearing platform as shown in Figure 1, is made up of bottom steel truss 1, upper steel truss 2, scaffold formwork system 3, recoverable screw rod 9, local recoverable screw rod 7, guide rail 8, removable jointing plate 12, additional jointing plate 13, drag-line 14, structural column 10.Bottom steel truss 1 is fixed on concrete floor by recoverable screw rod 9, local recoverable screw rod 7.Removable jointing plate 12 is connected to bottom steel truss 1, and additional jointing plate 13 is placed on removable jointing plate 12.Upper steel truss 2 is connected with bottom steel truss 1 by guide rail 8, coordinates with bolt-weld joint simultaneously.Drag-line 14 connects removable jointing plate 12 and upper steel truss 2.
As shown in Figure 2, recoverable screw rod is by screw rod bellend 16, and anchoring top board 18, nut 19, screw rod 20, direction hinge 17, PVC sleeve pipe 21 form.PVC sleeve pipe 21 is embedded in concrete floor in advance, after steel truss is placed, inserts in screw rod 20 to PVC sleeve pipe 21, and anchoring top board to be positioned under bottom steel truss on boom plate 5, utilizes fastening nut 19 to fix bottom steel truss.Screw rod 20 is provided with direction hinge 17, is convenient to folding and unfolding and arranges.Back out nut 19 after having constructed, take off anchoring top board 18, rap screw rod 20 top and can to dismantle easily whole anchoring fastener, can use be had enough to meet the need.
As shown in Figure 3, local recoverable screw rod 7 is made up of the screw hole 23 be embedded in structural column 10 and removable screw rod 22, and screw hole 23 is just imbedded wherein when structural column is constructed, and the later stage does not also remove.Removable screw rod 22 is screwed in screw hole 23 after bottom steel truss is installed, and fixes the lower boom plate 6 of bottom steel truss.Later stage to back-out removable screw rod 22 when removing, and reuses.
As shown in Figure 4, upper steel truss 2 is connected by guide rail 8 with bottom steel truss upper string board 6, is provided with pulley 24 in guide rail, facilitates top steel truss to horizontally slip.In order to ensure the safety of structure, upper steel truss 2 and bottom steel truss upper string board 6 are also welded to connect.
The construction method of above-mentioned high-altitude overhanging superposed type steel truss bearing platform, comprises following construction sequence:
Step one, screw rod associated part are pre-buried: before concrete construction, need imbed the PVC sleeve pipe 21 of recoverable screw rod, vertical anchorage screw 20 and the screw hole of local recoverable screw rod in structural column;
It is in place that step 2, steel truss hang stake: lifting bottom steel truss after concrete structural slab maintenance completes, and utilizes pre-buried recoverable screw rod 9 and local recoverable screw rod 7 to fix bottom steel truss 1.
Step 3, removable jointing plate 12, additional jointing plate 13 are installed: be welded to connect removable jointing plate 12 after bottom steel truss 1 installation, and according to the actual quantity determining additional jointing plate 13 of engineering, additional jointing plate 13 is arranged on removable jointing plate 12.
Step 4, guide rails assembling: guide rail 8 is arranged on bottom steel truss 1 top;
Step 5, upper steel truss 2 are installed: on guide rail 8, insert upper steel truss 2, form embedded connection, connect upper steel truss 2 and bottom steel truss 1 after embedded connection completes by bolt weldering mode;
Step 6, drag-line 14 are installed: between removable jointing plate 12 and upper steel truss 2 end, install drag-line 14;
Step 7, scaffold formwork system are set up: utilize upper steel truss 2 to stretch out scaffold formwork system that structure division sets up cantilevered structure, and the section of stretching out steel truss is as the bearing platform of scaffold formwork system.
Claims (6)
1. a construction method for high-altitude overhanging superposed type steel truss bearing platform, is characterized in that described bearing platform is primarily of bottom steel truss, upper steel truss, scaffold formwork system, pre-buried recoverable screw rod, local recoverable screw rod, guide rail, removable jointing plate, additional jointing plate, drag-line and structural column composition; Bottom steel truss is fixed on by pre-buried recoverable screw rod, local recoverable screw rod on the structural column of having constructed, and is connected with removable fixing jointing plate and additional jointing plate outside bottom steel truss; Upper steel truss utilizes bolt to weld and combines and is connected bottom steel truss with guide rail, between removable jointing plate and upper steel truss end, be provided with drag-line; Upper steel truss stretches out the bearing platform becoming top cantilevered structure scaffold formwork system outside structure;
The construction method of high-altitude overhanging superposed type steel truss bearing platform comprises following construction sequence:
Step one, screw rod associated part are pre-buried: before concrete construction, imbed PVC sleeve pipe and vertical anchorage screw, the screw hole of local recoverable screw rod in structural column of recoverable screw rod;
It is in place that step 2, steel truss hang stake: lifting bottom steel truss after concrete structural slab maintenance completes, and utilizes pre-buried recoverable screw rod and local recoverable screw rod to fix bottom steel truss;
Step 3, removable jointing plate, additional jointing plate are installed: be welded to connect removable jointing plate after the installation of bottom steel truss, according to the actual quantity determining additional jointing plate of engineering, additional jointing plate is arranged on removable jointing plate;
Step 4, guide rails assembling: guide rails assembling is at bottom steel truss top;
Step 5, upper steel truss installa-tion: on guide rail, insert upper steel truss, form embedded connection, connects upper steel truss and bottom steel truss after embedded connection completes by bolt weldering mode;
Step 6, drag-line are installed: between removable jointing plate and upper steel truss end, install drag-line;
Step 7, scaffold formwork system are set up: utilize upper steel truss to stretch out scaffold formwork system that structure division sets up cantilevered structure, and the section of stretching out steel truss is as the bearing platform of scaffold formwork system.
2. construction method according to claim 1, it is characterized in that, pre-buried recoverable screw rod is arranged in the concrete floor under bottom steel truss, be made up of pvc pipe, vertical anchorage screw and anchoring top board, PVC sleeve pipe is placed on outside vertical anchorage screw, and anchoring top board to be fixedly installed under bottom steel truss on boom plate by vertical anchorage screw and nut; Vertical anchorage screw is provided with direction hinge.
3. construction method according to claim 1, is characterized in that, local recoverable screw rod is arranged in structural column.
4. construction method according to claim 1, is characterized in that, removable jointing plate is connected by pre-buried recoverable screw rod with concrete, and additional jointing plate is concrete block, is placed on removable jointing plate.
5. construction method according to claim 1, is characterized in that, guide rail is arranged at the upper string board of bottom steel truss, embedded connection upper steel truss, and guide rail both sides are provided with pulley, and upper steel truss utilizes the pulley in guide rail to realize sliding.
6. construction method according to claim 1, is characterized in that, drag-line one end is provided with termination and is embedded in removable jointing plate, and the other end connects upper steel truss.
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| CN201510282733.3A CN104989092B (en) | 2015-05-28 | 2015-05-28 | A kind of construction method of high-altitude overhanging superposed type steel truss bearing platform |
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| CN201510282733.3A CN104989092B (en) | 2015-05-28 | 2015-05-28 | A kind of construction method of high-altitude overhanging superposed type steel truss bearing platform |
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| CN105926915A (en) * | 2016-05-05 | 2016-09-07 | 河南省第建筑工程集团有限责任公司 | Construction method of Bailey beam high-altitude long overhanging working platform |
| CN108222480A (en) * | 2017-12-15 | 2018-06-29 | 北京工业大学 | A kind of high-altitude overhanging main truss posture steel mould base construction platform |
| CN111042510A (en) * | 2020-01-02 | 2020-04-21 | 中国建筑第八工程局有限公司 | Construction platform for constructing daylighting roof and construction method thereof |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105926915A (en) * | 2016-05-05 | 2016-09-07 | 河南省第建筑工程集团有限责任公司 | Construction method of Bailey beam high-altitude long overhanging working platform |
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| CN108222480B (en) * | 2017-12-15 | 2024-02-02 | 北京工业大学 | High-altitude cantilever main truss type steel formwork construction platform |
| CN111042510A (en) * | 2020-01-02 | 2020-04-21 | 中国建筑第八工程局有限公司 | Construction platform for constructing daylighting roof and construction method thereof |
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Inventor after: Wu Zerui Inventor before: Wang Xinquan |
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Effective date of registration: 20170609 Address after: Luohu District Baoan road Shenzhen city Guangdong province 518000 No. 3083 Caiwuwei development building 2101 Patentee after: Shenzhen Golden Century Engineering Industry Co., Ltd. Address before: Gongshu District Shi Xiang Road Hangzhou city Zhejiang province 310015 and Hangzhou Road intersection C Wanda Plaza office building room 1901 Patentee before: Hangzhou Jiang Run Science and Technology Ltd. |
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