CN101245621A - Cast-in-situ hollow building roof construction method - Google Patents
Cast-in-situ hollow building roof construction method Download PDFInfo
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- CN101245621A CN101245621A CNA200810049403XA CN200810049403A CN101245621A CN 101245621 A CN101245621 A CN 101245621A CN A200810049403X A CNA200810049403X A CN A200810049403XA CN 200810049403 A CN200810049403 A CN 200810049403A CN 101245621 A CN101245621 A CN 101245621A
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Abstract
The invention relates to a construction method for cast-in-cast hollow floors, which can effectively solve the problems that the GRC prefabricated thin-wall pipes in the construction are easy to upward float due to the light weights, the waterproof strength is reduced, and the concrete at the bottom of the thin-wall pipes is easy to get loosened. The invention adopts the technical proposal that: a formwork of the floor is raised; steel bars of an exterior frame beam are bundled; reserving and pre-burying lines of position for the installation of an internal frame beam and a hidden beam, lines of position for the reinforced net and the lower rows of steel bars of floorslabs, and controlling sidelines for hollow pipes are marked on the formwork; the internal frame beam, the hidden beam, the lower rows of steel bars of the floorslabs are bundled; reinforcements are arranged at the lower part of the thin-wall pipes; inserted and buried pipes are installed; holes are drilled on the wood formworks between two pipes; the thin-wall pipes are installed; the anti-floating steel bars on the top of the thin-wall pipes are placed, the anti-floating steel bars on the thin-wall pipes are then bundled; iron wires are firstly fixed with the support reinforcement of the formwork, and the anti-floating steel bars are tightly screwed, then an upper layer of steel bars is bundled to be fixed with the reinforced net; bamboo plywood and pumped pipes are respectively laid and installed; the concrete is cast and maintenance for the concrete is then carried out. The construction method for cast-in-cast hollow floor has the advantages of reducing engineering cost and having great economic and social benefits.
Description
One, technical field
The present invention relates to building field, particularly a kind of job practices of cast-in-situ hollow building roof.
Two, background technology
Continual and steady fast development along with China's economy, country increases building input, builing industry is developed on an unprecedented scale, the overall technology level of builing industry is greatly improved, in order to adapt to current development situation, adopt advanced new technology to become general problem in the building, but also there is such or such problem simultaneously, be example now with current light-wall pipe commonly used or box-body cast-in-place hollow building cover, existing GRC prefabricated thin-wall pipe is the paper tube with costliness, hard plastic tube; the thin-walled corrugated steel tube is made; cost is very high owing to easily float in heavy and light and construction, is met water intensity and is reduced; leakiness appears in light-wall pipe bottom concrete easily; influence construction quality and construction speed and production efficiency greatly, therefore, its innovation is imperative.
Three, summary of the invention
Actual needs at above-mentioned situation and builing industry, the present invention's purpose just provides a kind of job practices of new cast-in-situ hollow building roof, can effectively solve GRC prefabricated thin-wall pipe (is hollow section, as follows) owing in heavy and light is constructed, easily floating, chance water intensity reduces; uncompacted problem appears in light-wall pipe bottom concrete (also claiming concrete; as follows) easily; the technical scheme of its solution is; install the superstructure template; colligation housing beam steel; mark the inner frame beam on template; dark beam is installed the set aside pre-embedded position line; reinforced mesh; the position line of placing of reinforcement and hollow section are controlled the sideline at the bottom of the floor; beginning colligation inside casing is set a roof beam in place; dark beam; underfloor placing of reinforcement; place light-wall pipe lower support muscle; interspersed pipe laying is installed; wooden form punching between two pipes; light-wall pipe is installed; disposed tubes is offended and disobey with rude remarks floating reinforcing bar, and anti-floating reinforcing bar on the colligation pipe is fixed with the template supporting steel pipe or the lumps of wood earlier with iron wire; the anti-floating reinforcing bar is tightened; the colligation top reinforcement again, fixed with reinforced mesh, carry out self check; apply for checking and examination; hidden examination; pump line position laying bamboo offset plate will be installed, ground pump pump line is installed; Build at last after the concrete, carry out concrete curing.This technology can be saved template, and accelerating construction progress reduces engineering cost, alleviates the superstructure deadweight, rational in infrastructure, soundproof effect is good, and anti-seismic performance is good, has improved the degree of safety of building, building floor area ratio, land utilization ratio increases building storey, and economic and social benefit is huge.
Four, description of drawings
Accompanying drawing is a process chart of the present invention.
Five, the specific embodiment
Below in conjunction with process chart the present invention is elaborated.Provided by process chart, the present invention is realized by following steps:
1, installs the superstructure template;
2, colligation housing beam steel;
3, on template, mark inner frame beam, the dark beam installation set aside pre-embedded position line, the reinforced mesh position line, the placing of reinforcement position line at the bottom of the floor, hollow section control sideline;
4, the colligation inside casing set a roof beam in place, dark beam, underfloor placing of reinforcement;
5, place light-wall pipe lower support muscle, after underlying network sheet reinforcing bar binding finishes, lay light-wall pipe lower support muscle, and be connected with muscle colligation at the bottom of the beam, the brace rod bottom is provided with the thick concrete pad of 50mm;
6, install to intert pipe laying, for ease of the installation that is provided with of anti-floating reinforcing bar, suitable shop earlier standard pipe, pipe range 900mm, after put short tube;
7, wooden form punching between two pipes, adopting diameter is the electric drill of 10mm drill bit, holes on the template of bottom;
8; Light-wall pipe is installed; Disposed tubes is offended and disobey with rude remarks floating reinforcing bar; Before the light-wall pipe construction; The pipe of prefabricated different size; Carry out light-wall pipe processing; After light-wall pipe is transported to the job site examination; Stack respectively according to the light-wall pipe specifications and models; So that management and using; In order to make things convenient for vertical transport; 48# steel pipe manufacturing light-wall pipe cage should be used in the scene; By tower crane light-wall pipe is transported to the floor scope of operation; The forbidding rope directly bundlees handling; Light-wall pipe is stored; Necessary horizontal positioned during carrying; Forbid to stand up; In order to avoid the pipe end breakage when causing casting concrete concrete flow in the pipe; After light-wall pipe is transported to the operation floor; Planar dimension according to every floor; The construction joint position; The orientation of set aside pre-embedded light-wall pipe is discharged, and notes during comb handling with care, avoids breaking thin-wall hollow pipe; Undesirable timely replacing; Because light-wall pipe from heavy and light, can produce larger buoyancy, so must carry out the fixing of light-wall pipe; Otherwise can cause come-up; In conjunction with field condition, adopt fixedly light-wall pipe of anti-floating beading mode, every tube head 1/5 place is the anti-floating application point; The Anti-floating reinforcing steel bar node weld wants firmly slag inclusion to be arranged;
9, anti-floating reinforcing bar on the colligation pipe makes it be connected with beam main tendon, and the anti-floating rebar spacing must not be greater than 70mm, and the anti-floating reinforcing bar is tied up across light-wall pipe and with the beam rib and is one;
10, the anti-floating reinforcing bar is worn the 12# iron wire on the pipe, (spacing 500～700mm) passes template and form bracing system draws the anti-floating reinforcing bar on the supporting steel pipe that is fixed under the template with the 12# iron wire, the anti-floating reinforcing bar is tied up to after the one apart from end 100～180mm and with the beam rib across light-wall pipe, utilize the electric drill of diameter for the 10mm drill bit, on the template of bottom, hole, the anti-floating reinforcing bar is socketed on the supporting steel pipe under the template by spacing 500～700mm with the 12# iron wire then, follow binding structure plate top mat sheet, anti-floating reinforcing bar and the colligation of top mat sheet are fixed, and form a complete anti-floating drawknot system;
11, anti-floating steel reinforcing is fixed with the template supporting steel pipe or the lumps of wood earlier with iron wire, the anti-floating reinforcing bar is tightened again, and the anti-floating reinforcing bar of light-wall pipe must be firm with iron wire and falsework drawknot, and its bottom template hole must stop up tightly;
12, colligation top reinforcement, fix with reinforced mesh; after light-wall pipe has been laid and reinforced; colligation top mat sheet, top reinforcement colligation and mooring anchor spacing are even, and anti-floating reinforcing bar and the colligation of top mat sheet are fixed; make it form whole anti-floating system; iron wire must be strained, so that effectively resist buoyancy, avoid producing to top offset;
13, self check, apply for checking and examination, hidden examination, the hidden examination of reinforcing bar, light-wall pipe are fixed, through supervising engineer's acceptance(check);
14, the pump line position will be installed and lay the bamboo offset plate, ground pump pump line will be installed;
15, build concrete, in the concreting process, because light-wall pipe is from heavy and light, move horizontally easily, welded steel fabric sheet and light-wall pipe are laid and must be kept straight, spacing will guarantee that its position is accurately vertical with wall body between two combs (casing), guarantee the concrete physical dimension of hollowcore slab intercostal, concreting acts in accordance with the light-wall pipe direction and builds, guarantee the concrete compactness of hollowcore slab, concrete slump is controlled at 20～22cm, assurance has good flowability, during construction, elder generation's casting beams position concrete, after-pouring board position concrete, the concrete of every block of plate will be built in two steps and be finished, at first, with whole light-wall pipe concrete rib blanking to 2/3 height of every block of plate, use plug-in type (30 type) concrete vibrating rod carefully to vibrate, must evenly vibrate, must not leak and shake, again with concreting to absolute altitude, and build once more on request and vibrate, when using vibrating spear to vibrate, must not be to the continuous vibrating time in same position above 3 minutes, forbid to damage light-wall pipe, because under the bigger situation of concrete slump, concrete water ash bigger, cement factor increases, increased that the back concrete produces the possibility in crack because the heat of hydration scatters and disappears, for this reason, covered measure according to carrying out 2 receipts faces and plastic sheeting concrete time of setting, thereby alleviate the heat of hydration and moisture loss speed, avoided the generation in crack;
16, concrete curing, concrete maintenance: normal temperature (18-25 ℃) when construction, water spray or use the curing agent maintenance in 12 hours after the form removable, the time is no less than 7 days.
When said light-wall pipe was constructed in the rainy day; outer surface should evenly be sprayed interleaving agent one deck before installing; and with colour bar cloth covering protection; in order to avoid influence light-wall pipe intensity because of light-wall pipe soaks the rainwater overlong time; the position that the small size breakage in installation process, occurs; should use viscose fibre and lean concrete grout or adhesive tape to repair, the pipe that damage area is bigger should be changed.The quality requirement of light-wall pipe sees the following form:
The permissible variation in dimension of light-wall pipe, concrete parameter sees the following form
| Project | Allowable variation (mm) |
| Length (length of side) | 0，-10(0，-20) |
| External diameter (highly) | ±3(±5) |
| Wall thickness (sampling observation) | ±2 |
| End face (surface) planeness | 5(5) |
| Pipe (case) body planeness | ≤3(4) |
The present invention is from the engineering practice effect analysis; the present invention has obtained good economic benefit and social benefit at aspects such as quality, cost, duration, energy-conservation, environmental protection, labour protections; according to engineering span, load difference; reduce total cost about 15%; save vertical water power, elevator, air-conditioning, decorating inner and external walls expense 10%; the template proportion of goods damageds reduce by 50%; the GRC prefabricated thin-wall conduit is compared with the girder cast-in-place concrete plate is arranged; save 34 yuan for every square metre; heat preservation and insulation is significantly improved; this project structural safety; its from heavy and light, sound construction, distortion is little, rigidity is large, anti-seismic performance is good; can reduce the deadweight of building; improve safety of building and reliability, the owner can any combination be cut apart as required, selects usage space personalized, hommization; avoided the limitation of the format that traditional dwelling house brings, economic and social benefit is huge.
Claims (3)
1, a kind of job practices of cast-in-situ hollow building roof is characterized in that, installs the superstructure template; Colligation housing beam steel; On template, mark inner frame beam, the dark beam installation set aside pre-embedded position line, the position line of placing of reinforcement and hollow section control sideline at the bottom of reinforced mesh, the floor; The colligation inside casing sets a roof beam in place, dark beam, underfloor placing of reinforcement; Behind the underlying network sheet reinforcing bar binding, place light-wall pipe lower support muscle, and be connected with muscle colligation at the bottom of the beam, the brace rod bottom is provided with the thick concrete pad of 50mm; Install to intert pipe laying, the long tube of shop 900mm earlier, after put short tube; Wooden form punching between two pipes, diameter is 10mm; Installation light-wall pipe, disposed tubes are offended and disobey with rude remarks floating reinforcing bar, use fixedly light-wall pipe of anti-floating reinforcing bar, and every tube head 1/5 place is the anti-floating application point; Anti-floating reinforcing bar on the colligation pipe makes it be connected with beam main tendon, and the anti-floating rebar spacing must not be greater than 70mm, and the anti-floating reinforcing bar is tied up across light-wall pipe and with the beam rib and is one; Pass template and form bracing system draws the anti-floating reinforcing bar on the supporting steel pipe that is fixed under the template with iron wire, the anti-floating reinforcing bar is tied up to after the one apart from end 100～180mm and with the beam rib across light-wall pipe, the anti-floating reinforcing bar is socketed on the supporting steel pipe under the template by spacing 500～700mm with iron wire then in boring on the template of bottom, follow binding structure plate top mat sheet, anti-floating reinforcing bar and the colligation of top mat sheet are fixed, and form a complete anti-floating drawknot system; Fix with the template supporting steel pipe or the lumps of wood earlier with iron wire, the anti-floating reinforcing bar is tightened again, the anti-floating reinforcing bar of light-wall pipe is firm with iron wire and falsework drawknot, and bottom template hole stops up tight; The colligation top reinforcement is fixed with reinforced mesh, after light-wall pipe has been laid and has been reinforced, and colligation top mat sheet, top reinforcement colligation and mooring anchor spacing are even, and anti-floating reinforcing bar and the colligation of top mat sheet are fixed, and make it form whole anti-floating system, the iron wire tension; Lay the bamboo offset plate, ground pump pump line is installed; Build concrete, in the process of building, welded steel fabric sheet and light-wall pipe are laid and are kept straight, spacing will guarantee that its position is accurately vertical with wall body between two combs, concreting acts in accordance with the light-wall pipe direction and builds, concrete slump is controlled at 20～22cm, first casting beams position concrete, after-pouring board position concrete, the concrete of every block of plate will be built in two steps and be finished, at first, whole light-wall pipe concrete rib blanking to 2/3 height with every block of plate evenly vibrate with the concrete vibrating rod, again absolute altitude is arrived in concreting, and build once more and vibrate, when vibrating, the continuous vibrating time in same position must not be above 3 minutes; After the form removable in 12 hours the water spray or use the curing agent maintenance, the time is no less than 7 days.
2, the job practices of cast-in-situ hollow building roof according to claim 1; it is characterized in that; said installation light-wall pipe is when the rainy day; outer surface is evenly sprayed interleaving agent one deck before installing; and with colour bar cloth covering protection; the position that occurs the small size breakage in installation process uses viscose fibre and lean concrete grout or adhesive tape to repair.
3, the job practices of cast-in-situ hollow building roof according to claim 1 is characterized in that, the light-wall pipe spacing is 70mm, deviate ± 12mm; The light-wall pipe two ends are parallel, deviate ± 15mm; The maximum discrepancy in elevation of Xiang Linguan, deviate ± 15mm; Pipe is apart from post, wall distance 〉=300mm, deviate ± 15mm; Preheating embedding line position deviation value ± 15mm; Provided pipe hole centerline deviation value ± 5mm; The dimensions length deviation of light-wall pipe≤-10mm; Outside diameter tolerance ± 3mm; Wall thickness deviation ± 2mm; End face planeness deviation 5mm; Body planeness deviation≤3mm.
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| CN102071808A (en) * | 2011-01-13 | 2011-05-25 | 中建四局第三建筑工程有限公司 | Anti-floating positioning method and structure for core mould pipe |
| CN102296735A (en) * | 2011-05-18 | 2011-12-28 | 济南四建（集团）有限责任公司 | Anti-floating structure and method for cast-in-situ concrete GBF (glass basalt fiber) hollow floor slab |
| CN102979233A (en) * | 2012-09-06 | 2013-03-20 | 山东聊建集团有限公司 | Garage top slab structure and construction method and inner concrete structure cavity membrane thereof |
| CN103590602A (en) * | 2013-10-22 | 2014-02-19 | 重庆建工第三建设有限责任公司 | Method for constructing cast-in-site concrete hollow floor systems |
| CN103711245A (en) * | 2013-12-20 | 2014-04-09 | 魏琏 | Hollow beamless floor system structure and construction method thereof |
| CN104048629A (en) * | 2014-06-24 | 2014-09-17 | 天津二十冶建设有限公司 | Method for measuring and controlling gas buried pipe positions on coke oven foundation top plate |
| CN104060828A (en) * | 2014-03-24 | 2014-09-24 | 中建四局第一建筑工程有限公司 | Anti-floating construction technology and pouring mould structure of gypsum cavity mould boxes |
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| CN111305442A (en) * | 2020-04-10 | 2020-06-19 | 中建八局第二建设有限公司 | Anti-floating device for high-strength thin-wall hollow pipe of cast-in-situ floor and construction method |
| CN113175144A (en) * | 2021-04-06 | 2021-07-27 | 湖北省工业建筑集团有限公司 | Construction method of GBF high-strength alloy thin-wall square-box hollow floor |
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| CN102071808A (en) * | 2011-01-13 | 2011-05-25 | 中建四局第三建筑工程有限公司 | Anti-floating positioning method and structure for core mould pipe |
| CN102071808B (en) * | 2011-01-13 | 2012-09-26 | 中建四局第三建筑工程有限公司 | Anti-floating positioning method and structure for core mould pipe |
| CN102296735A (en) * | 2011-05-18 | 2011-12-28 | 济南四建（集团）有限责任公司 | Anti-floating structure and method for cast-in-situ concrete GBF (glass basalt fiber) hollow floor slab |
| CN102979233A (en) * | 2012-09-06 | 2013-03-20 | 山东聊建集团有限公司 | Garage top slab structure and construction method and inner concrete structure cavity membrane thereof |
| CN102979233B (en) * | 2012-09-06 | 2014-12-24 | 山东聊建集团有限公司 | Garage top slab structure and inner concrete structure cavity membrane thereof |
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| CN103590602B (en) * | 2013-10-22 | 2016-05-04 | 重庆建工第三建设有限责任公司 | The construction method of cast-in-place concrete hollow building roof |
| CN103711245A (en) * | 2013-12-20 | 2014-04-09 | 魏琏 | Hollow beamless floor system structure and construction method thereof |
| CN103711245B (en) * | 2013-12-20 | 2017-02-22 | 魏琏 | Hollow beamless floor system structure and construction method thereof |
| CN104060828A (en) * | 2014-03-24 | 2014-09-24 | 中建四局第一建筑工程有限公司 | Anti-floating construction technology and pouring mould structure of gypsum cavity mould boxes |
| CN104048629A (en) * | 2014-06-24 | 2014-09-17 | 天津二十冶建设有限公司 | Method for measuring and controlling gas buried pipe positions on coke oven foundation top plate |
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| CN111305442A (en) * | 2020-04-10 | 2020-06-19 | 中建八局第二建设有限公司 | Anti-floating device for high-strength thin-wall hollow pipe of cast-in-situ floor and construction method |
| CN113175144A (en) * | 2021-04-06 | 2021-07-27 | 湖北省工业建筑集团有限公司 | Construction method of GBF high-strength alloy thin-wall square-box hollow floor |
| CN113996882A (en) * | 2021-09-30 | 2022-02-01 | 中国化学工程第十四建设有限公司 | Large-scale tower equipment and tower-attached pipeline installation method |
| CN115095141A (en) * | 2022-06-21 | 2022-09-23 | 济南城建集团有限公司 | Construction method for lightweight structure of large-span tunnel roof |
| CN115653177A (en) * | 2022-11-12 | 2023-01-31 | 广东南海国际建筑设计有限公司 | Construction method of cast-in-place reinforced concrete hollow floor |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Liu Die Inventor after: Gao Xiangyun Inventor after: Wang Chengwei Inventor after: Zeng Fanna Inventor after: Meng Qingcui Inventor after: Li Juan Inventor after: Wang Songmei Inventor after: Gu Yaying Inventor after: Yu Chenxi Inventor after: Wang Maidui Inventor after: Ma Shiyan Inventor after: Cui Gaofeng Inventor after: Liu Haochun Inventor after: Su Yan Inventor after: Jiang Yaowu Inventor after: Mao Guoan Inventor after: Zheng Jucai Inventor before: Liu Die Inventor before: Gu Yaying Inventor before: Yu Chenxi Inventor before: Gao Xiangyun Inventor before: Wang Chengwei Inventor before: Liu Haochun Inventor before: Su Yan Inventor before: Zeng Fanna Inventor before: Meng Qingcui Inventor before: Li Juan Inventor before: Wang Songmei |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: LIU YI GAO XIANGYUN WANG CHENGWEI LIU HAOCHUN SU YAN CENG FANNA MENG QINGCUI LI JUAN WANG SONGMEI GU YAYING YU CHENXI TO: LIU YI WANG MAIDUI MA SHIYAN CUI GAOFENG LIU HAOCHUN SU YAN JIANG YAOWU MAO GUOAN ZHENG JUCAI GAO XIANGYUN WANG CHENGWEI CENG FANNA MENG QINGCUI LI JUAN WANG SONGMEI GU YAYING YU CHENXI |