CN102966240A - Construction method for high-altitude reinforced concrete outer cantilevered structure - Google Patents
Construction method for high-altitude reinforced concrete outer cantilevered structure Download PDFInfo
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- CN102966240A CN102966240A CN2012105054418A CN201210505441A CN102966240A CN 102966240 A CN102966240 A CN 102966240A CN 2012105054418 A CN2012105054418 A CN 2012105054418A CN 201210505441 A CN201210505441 A CN 201210505441A CN 102966240 A CN102966240 A CN 102966240A
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Abstract
The invention discloses a construction method for a high-altitude reinforced concrete outer cantilevered structure. The construction method is used for sectionally constructing the outer cantilevered structure from inside to outside, and comprises the steps as follows: (1) mounting a supporting platform at the lower part of the outer cantilevered structure; (2) constructing a first-section structure of the outer cantilevered structure, and constructing the length of an outer cantilevered part in the first-section structure when the supporting platform does not need to be added with a hanging rod and a tilted support; (3) carrying out concrete curing on the first-section structure, and adding a hanging structure between the outer part of the first-section structure and the supporting platform; (4) constructing a lower-section structure of the outer cantilevered structure, carrying out concrete curing on the lower-section structure, and if the lower-section structure is also arranged outside the current lower-section structure, adding the hanging structure again; (5) repeating the step (4) until all the lower-section structures are finished; and (6) carrying out form stripping, constructing decoration engineering, dismounting scaffolds and the hanging structures section by section, and dismounting the supporting platform, so that the construction process of the outer cantilevered structure is finished. The construction method simplifies the erection process of the supporting platform and has the effects of convenience for operation and remarkable economic and social benefits.
Description
Technical field
The present invention relates to the suspended structure at high altitude construction field, relate in particular the job practices of the outer cantilevered structure of a kind of high-altitude steel concrete.
Background technology
Large-scale high-rise public building in order to satisfy facade or sunshade requirement, often arranges the outer cantilevered structure of steel concrete of outstanding exterior wall.In recent years, this cantilevered structure length that overhangs is more and more longer, and its form bracing system becomes the construction Difficulties of total.Because cantilevered structure is higher apart from ground, adopt the console mode support system economically with technical all infeasible, normally adopt the shaped steel cantilever platform as the bearing surface of falsework and scaffold.
As shown in Figure 1, traditional support platform 9 arranges some suspension rods 91 or support bar 92, and when support platform 9 is positioned, the mode that employing is drawn is lower than the mode cost of support, in order to make things convenient for the setting of suspension rod 91 suspension centres, this support platform 9 needs to reduce by two to three layers thus, and the height of setting up like this falsework or scaffold is also higher, load is also larger, and then has the construction complexity and set up the high shortcoming of cost.
Summary of the invention
The object of the present invention is to provide the job practices of the outer cantilevered structure of a kind of high-altitude steel concrete, it has been simplified shaped steel and has chosen setting up of platform outward, has reduced support height, and has reliable, the easy to operate and obvious characteristics of economic and social benefits of construction safety.
In order to reach above-mentioned purpose, solution of the present invention is:
The job practices of the outer cantilevered structure of a kind of high-altitude steel concrete, wherein, this job practices with outer cantilevered structure by interior outward section construction, segment structure and at least one lower segment structure headed by soon outer cantilevered structure will be divided at least, between this head segment structure and the lower segment structure and all be provided with constuction joint between the different lower segment structure, this head segment structure has inner end section and chooses section outward;
This job practices comprises the steps:
1. the bottom mounting support platform of cantilevered structure outside;
2. the first segment structure of the outer cantilevered structure of construction, this head segment structure are chosen the length of section at home and abroad and should be constructed under support platform need not to increase the situation of suspension rod and diagonal brace;
3. first segment structure is carried out concrete curing, between first segment structure outside and support platform, add overhung construction again;
4. the lower segment structure of the outer cantilevered structure of construction, and lower segment structure carried out concrete curing, if also having lower segment structure, current hypomere structural outer again adds overhung construction;
5. repeating step is 4. until finish all lower segment structures;
6. form removal, the construction decorative engineering is torn scaffold and overhung construction piecemeal open, and dismounting support platform and finish the construction of external cantilevered structure.
Further, to choose the length of section at home and abroad be 1-1.5m to described first segment structure.
Further, this support platform is the shaped steel outrigger.
Further, this support platform is positioned at lower one deck of outer cantilevered structure.
Further, before adding overhung construction, also be included in the step that first segment structure or lower segment structure carry out local stiffening.
Further, this overhung construction is selected from a kind of in wire rope, reinforcing bar or the shaped steel.
After adopting said structure, the present invention relates to the job practices of the outer cantilevered structure of a kind of high-altitude steel concrete, it passes through the section construction of outer cantilevered structure from-inner-to-outer, and allow the load of this support platform also apply stage by stage, so can utilize self intensity of molded structure in the outer cantilevered structure to bear deadweight and bear the load of support platform by pull bar, thereby greatly reduce the support platform load, optimize the support platform structure stress, greatly reduce the specification of shaped steel and suspension rod.
Compared with prior art, the present invention has simplified shaped steel and has chosen setting up of platform outward, reduces support height, improves construction safety, and have easy to operate, the obvious effect of economic and social benefit.
Description of drawings
Fig. 1 is at the structural representation of construction support platform during cantilevered structure in the prior art;
Fig. 2 the present invention relates to job practices China and foreign countries' cantilevered structure of the outer cantilevered structure of a kind of high-altitude steel concrete and the structural representation of support platform;
Fig. 3 is the schematic diagram of the first segment structure of construction;
Fig. 4 is the schematic diagram that adds overhung construction;
Fig. 5 is for increasing the schematic diagram that can suspend aggregated(particle) structure in midair when carrying out local stiffening.
Among the figure:
Outer cantilevered structure 1 first segment structure 11
The 111 outer sections 112 that choose of inner end section
Aggregated(particle) structure girder steel 4
Support platform 9 suspension rods 91
Support bar 92
The specific embodiment
In order further to explain technical scheme of the present invention, the present invention will be described in detail below by specific embodiment.
Extremely shown in Figure 5 such as Fig. 2, the job practices of the outer cantilevered structure 1 of a kind of high-altitude steel concrete that the present invention relates to, this job practices with outer cantilevered structure 1 by interior outward section construction, segment structure 11 and at least one lower segment structure 12 headed by soon outer cantilevered structure 1 will be divided at least, as shown in Figure 2, in the present embodiment, this outer cantilevered structure 1 has first segment structure 11 and two lower segment structures 12; Between this head segment structure 11 and the lower segment structure 12 and all be provided with constuction joint 13 between the different lower segment structure 12,11 of this head segment structures have inner end section 111 and choose section 112 outward.
This job practices specifically comprises the steps:
1. the bottom mounting support platform 2 of cantilevered structure 1 outside; In the present embodiment, this support platform 2 is the shaped steel outrigger;
2. the first segment structure 11 of the outer cantilevered structure 1 of construction, this head segment structure 11 are chosen the length of section 112 at home and abroad and should be constructed under support platform 2 need not to increase the situation of suspension rod and diagonal brace; Please refer to shown in Figure 3ly, preferably, it is 1-1.5m that this head segment structure 11 China and foreign countries choose section's 112 length, the same with normal construction for this inner end section 111, need not unnecessary description;
3. first segment structure 11 is carried out concrete curing, add overhung construction 3 again between first segment structure 11 outsides and support platform 2, this overhung construction 3 can be wire rope, reinforcing bar or shaped steel; Specifically please refer to shown in Figure 4;
4. the lower segment structure 12 of the outer cantilevered structure 1 of construction, and lower segment structure 12 carried out concrete curing, if also having lower segment structure 12, current lower segment structure 12 outsides again add overhung construction 3;
5. repeating step is 4. until finish all lower segment structures 12, and then reaches structure shown in Figure 2;
6. form removal, the construction decorative engineering is torn scaffold and overhung construction 3 piecemeal open, and dismounting support platform 2 and finish the construction of external cantilevered structure 1.
Like this, the present invention relates to the job practices of the outer cantilevered structure 1 of a kind of high-altitude steel concrete, it passes through outer cantilevered structure 1 from-inner-to-outer section construction, and allow the load of this support platform 2 also apply stage by stage, so can utilize self intensity of molded structure in the outer cantilevered structure 1 to support support platform 2, thereby greatly reduce support platform 2 loads, greatly reduce the specification of shaped steel and suspension rod, lower one deck that this support platform like this is positioned at outer cantilevered structure 1 can reach requirement, as shown in Figure 2.
Build the structure of moulding in order to ensure leading portion and can bear the pulling force of vertical and horizontal direction, before adding overhung construction 3, also be included in the step that first segment structure 11 or lower segment structure 12 carry out local stiffening.When concrete the reinforcing, can adopt following several technical scheme:
One: increase the beam slab arrangement of reinforcement, but it is unsuitable too many to increase quantity of reinforcement, otherwise can affects the performance of original structure.
Two: keep the shuttering supporting of stressed beam slab and lower some layers of beam slab thereof, in case of necessity extension supporting.
Three: the concrete slab of the single-beam of framework because not being connected, generally can not bear suspention pull bar (rope) oblique pull horizontal component, can girt be set at single-beam, suffered horizontal component is passed to other position, such as the beam column of framework zone or panel ceiling for storied building etc. is arranged;
Four: when pull bar or stay cord do not have suspensible structure, can add aggregated(particle) structure girder steel 4, by aggregated(particle) structure girder steel 4 suffered suspention pulling force is passed to main structure (such as girder, post), this aggregated(particle) structure girder steel 4 should preferentially adopt the square girder steel of lattice, specifically please refer to shown in Figure 5.
In sum, compared with prior art, the present invention has simplified shaped steel and has chosen setting up of platform outward, reduces support height, improves construction safety, and have easy to operate, the obvious effect of economic and social benefit.
Above-described embodiment and graphic and non-limiting product form of the present invention and style, any person of an ordinary skill in the technical field all should be considered as not breaking away from patent category of the present invention to its suitable variation or modification of doing.
Claims (6)
1. the job practices of the outer cantilevered structure of a high-altitude steel concrete, it is characterized in that, this job practices with outer cantilevered structure by interior outward section construction, segment structure and at least one lower segment structure headed by soon outer cantilevered structure will be divided at least, between this head segment structure and the lower segment structure and all be provided with constuction joint between the different lower segment structure, this head segment structure has inner end section and chooses section outward;
This job practices comprises the steps:
1. the bottom mounting support platform of cantilevered structure outside;
2. the first segment structure of the outer cantilevered structure of construction, this head segment structure are chosen the length of section at home and abroad and should be constructed under support platform need not to increase the situation of suspension rod and diagonal brace;
3. first segment structure is carried out concrete curing, between first segment structure outside and support platform, add overhung construction again;
4. the lower segment structure of the outer cantilevered structure of construction, and lower segment structure carried out concrete curing, if also having lower segment structure, current hypomere structural outer again adds overhung construction;
5. repeating step is 4. until finish all lower segment structures;
6. form removal, the construction decorative engineering is torn scaffold and overhung construction piecemeal open, and dismounting support platform and finish the construction of external cantilevered structure.
2. the job practices of the outer cantilevered structure of a kind of high-altitude steel concrete as claimed in claim 1 is characterized in that the length that described first segment structure is chosen section at home and abroad is 1-1.5m.
3. the job practices of the outer cantilevered structure of a kind of high-altitude steel concrete as claimed in claim 1 is characterized in that this support platform is the shaped steel outrigger.
4. the job practices of the outer cantilevered structure of a kind of high-altitude steel concrete as claimed in claim 1 is characterized in that this support platform is positioned at lower one deck of outer cantilevered structure.
5. the job practices of the outer cantilevered structure of a kind of high-altitude steel concrete as claimed in claim 1 is characterized in that, also is included in the step that first segment structure or lower segment structure carry out local stiffening before adding overhung construction.
6. the job practices of the outer cantilevered structure of a kind of high-altitude as claimed in claim 1 steel concrete is characterized in that, this overhung construction is selected from a kind of in wire rope, reinforcing bar or the shaped steel.
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| CN201210505441.8A CN102966240B (en) | 2012-11-30 | 2012-11-30 | Construction method for high-altitude reinforced concrete outer cantilevered structure |
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Cited By (5)
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| CN103206075A (en) * | 2013-04-26 | 2013-07-17 | 中国化学工程第三建设有限公司 | Suspension platform for construction of steel reinforced concrete cantilever structure |
| CN103470036A (en) * | 2013-09-04 | 2013-12-25 | 中建三局第一建设工程有限责任公司 | Overhanging structure construction method |
| CN104100090A (en) * | 2014-07-17 | 2014-10-15 | 成都市第四建筑工程公司 | High-altitude comprehensive construction method of big-cantilever steel truss structure |
| CN106988520A (en) * | 2017-03-01 | 2017-07-28 | 中国建筑第八工程局有限公司 | Construction method and support system for high-rise overhung construction |
| CN107227814A (en) * | 2017-06-19 | 2017-10-03 | 中国建筑第二工程局有限公司 | Sectional construction method for large cantilever concrete structure |
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| CN103122693A (en) * | 2011-11-18 | 2013-05-29 | 中国建筑第七工程局有限公司 | Multi-layer oversized-area reinforced concrete ground seamless construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103206075A (en) * | 2013-04-26 | 2013-07-17 | 中国化学工程第三建设有限公司 | Suspension platform for construction of steel reinforced concrete cantilever structure |
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| CN104100090A (en) * | 2014-07-17 | 2014-10-15 | 成都市第四建筑工程公司 | High-altitude comprehensive construction method of big-cantilever steel truss structure |
| CN106988520A (en) * | 2017-03-01 | 2017-07-28 | 中国建筑第八工程局有限公司 | Construction method and support system for high-rise overhung construction |
| CN106988520B (en) * | 2017-03-01 | 2020-06-09 | 中国建筑第八工程局有限公司 | Construction method and support system for high-rise suspension structure |
| CN107227814A (en) * | 2017-06-19 | 2017-10-03 | 中国建筑第二工程局有限公司 | Sectional construction method for large cantilever concrete structure |
| CN107227814B (en) * | 2017-06-19 | 2019-05-03 | 中国建筑第二工程局有限公司 | Sectional construction method for large cantilever concrete structure |
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| CN102966240B (en) | 2014-02-19 |
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