CN1329201A - Non-binding prestressed two-way rib floor structure storey-by-storey lift slab construction method - Google Patents
Non-binding prestressed two-way rib floor structure storey-by-storey lift slab construction method Download PDFInfo
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- CN1329201A CN1329201A CN 01123983 CN01123983A CN1329201A CN 1329201 A CN1329201 A CN 1329201A CN 01123983 CN01123983 CN 01123983 CN 01123983 A CN01123983 A CN 01123983A CN 1329201 A CN1329201 A CN 1329201A
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Abstract
The present invention relates to a non-bonded prestressed two-way rib floor column structure layer-by-layer lift-slab construction method, including this following steps: after the construction of column footing, mounting steel pipe column casing, them making base course of first floor, making first floor salb, installing lifting machine, all the lifting points are lifted to first floor height synchronously in equal step, pouring column cap concrete, automatically hoisting the lifting machine to second lifting position, making the second floor salb on the first floor slab, lifting the second floor slab and the like. Every lifting height is one floor height only, and its free column part only has the height of two floors, and its shuttering cost is reduced, column section can be greatly reduced and its total lifting height only is 1/4 of that of traditional lift-slab method.
Description
The present invention relates to a kind of floor framing job practices.
The superstructure of China's slab column system mainly contains flat board and two kinds of forms of two-way multi-ribbed plate at present.Non-cohesive Prestressing Force Technology is mainly used in slabbed construction, and it is non-prestressed that two-way ribbed slab floor then mostly is, so its colum network size is seldom broken through 9m.Traditional lift slab method is after the whole on the ground overlapping productions of the floor of whole building are finished, and top-down more successively the lifting puts in place.Generally only be applicable to plate floor, be not suitable for the girt strip superstructure.This lift slab method has tangible weak point: at first being that the lifting overall height is big, is that 7 floors of 4.5m calculate with the floor height, promotes overall height h=(7+6+-----+3+2+1) * 4.5=[(7+1)/2] * 7 * 4.5=28 * 4.5=126m; Next is that column cross-section size often is subjected to maximum lifting height and stable control, rather than the control of the bearing capacity of user mode, finishes once promote, and it is too rich that column section just seems; Having is exactly that formwork can't have enough to meet the need owing to lamination production again, has how many floor plates just to need the formwork of how many layers, and the formwork expense is higher.
The purpose of this invention is to provide a kind of non-binding prestressed two-way rib floor structure storey-by-storey lift slab construction method, reduce lifting capacity, formwork expense and column cross-section size, enlarge colum network size, reduce the building cover structure layer height, reduce building height, save construction cost, save building land.
Technical scheme of the present invention: make one deck floor, promote one deck floor immediately, concrete steps are:
(1), patten construction;
(2), the steel pipe column sleeve is installed;
(3), do the basic unit of bottom terrace;
(4), make first floor;
(5), elevator is installed;
(6), step pitch such as each hoist point rises to the first floor height synchronously;
(7), build the cap concrete;
(8), elevator is from being raised to second raised position;
(9), compound steel tubing string cover is installed;
(10), elevator, preparation lifting next time is installed;
(11), on the first floor floor, make second layer floor;
(12), second layer floor is promoted to second layer height, each floor plate is made and is promoted by that analogy;
(13), build the interior concrete of steel pipe column sleeve.
Make the step of floor: a in above-mentioned (4), (11), divide grid, brushing interleaving agent; B, put formwork; C, cloth muscle and put embedded part, enhancing ring, pipeline; D, concreting; E, curing concrete are to reaching stretch-draw intensity; F, tensioned prestressing bar.
Elevator is to promote synchronously with step pitches such as computer programme-control in above-mentioned (5), (6), promptly works as certain hoist point and is raised to a height earlier, stops, and waits all to carry and a little all is raised to sustained height, begins the lifting of next height more simultaneously.
Concrete in above-mentioned (13) in steel pipe column sleeve is successively to build or visual steel pipe bearing capacity is taked several layers of one-time-concreting or full height one-time-concreting.
Concreting in above-mentioned (7), (13) is pumping of concrete or manually builds.
Know-why of the present invention: the non-binding prestressed two-way rib floor structure storey-by-storey lift slab construction method is that the first floor plate is made the last layer floor as bed die under using, and promotes the job practices that puts in place immediately.Should first ground grading, make the first floor floor on the ground, reach promote intensity after, tensioned prestressing bar promptly rises to the first floor height, makes second floor again and rise to second layer height on the first floor floor, so analogizes.
Advantage of the present invention: every making one laminate of non-binding prestressed two-way rib floor structure storey-by-storey lift slab construction method, promote a laminate immediately, each hoisting depth all has only a story height, free shell of column has only two story heights, column section be can't help the stable control in the lifting process, can be controlled by bearing capacity fully.
This new structure system and cast-in-situ beam slab structure adopt the slab column system of traditional lift-slab construction to compare, and following tangible technology economy advantage is arranged:
With the span is 18m, and floor height is that the multistoried building of 4m is an example: if adopt the slab column system of traditional lift-slab construction, its girder height is at least 1.5m (Lo/12).Adopt the non-binding prestressed two-way rib floor structure storey-by-storey lift slab construction method, then girt strip height 0.45m (Lo/40) only.The latter can reduce deck height 1.05m than the former, also can reduce building floor height 1.05m, can build a floor with the height of 4 floors more, only is 1/4 of traditional lift-slab hoisting depth, can reduce by 3/4 lifting expense.7 floors that still with the floor height are 4.5m calculate, total hoisting depth h=7 * 4.5=31.5.Can reduce the building cover structure layer height greatly, correspondingly just reduce building height, can save construction cost, save building land.Two-way Non-cohesive Prestressing Force Technology is used for two-way ribbed slab floor, compares, can enlarge 1 times of colum network size with the ordinary concrete close rib building roof.By existing technical level, the post net that can make slab column system expands 18m to about by present 9m.
Every making one deck floor promotes immediately and puts in place, and form removal, thereby formwork can have enough to meet the need use, no matter how many floor plates are arranged, all only needs the formwork of first floor, can reduce the formwork expense greatly.Adopt the standard series formwork, can remove whole support systems from, the shuttering work amount is reduced to minimum.If be used for the disposable formwork of pea gravel concreten or the cavity filling block of two-way ribbed slab floor, can remove formwork from and remove operation.Floor can form smooth soffit, need not do furred ceiling.
But step pitches such as computer program control promote synchronously, for example work as certain hoist point and are raised to 20mm earlier, promptly stop, wait all to carry and a little all be raised to 20mm, begin the lifting of next 20mm more simultaneously, can control the high end of each hoist point poor＜10mm, the large-tonnage (as 60 tonnes) that can be used for the huge pillar net promotes unit.The post net of this structural system adopts concrete filled steel tubular column and the stealthy cap of the hoop formula frustum of a cone, and in whole lifting process, free shell of column all has only two story heights, column section is controlled by the user mode bearing capacity calculation, can reduce column cross-section size, save cost, increase usage space.In lifting process, can weld the steel rest that temporarily bears floor weight very easily.
This structural system can adapt to the various floors of flat board, rib type building, band filling block rib type, is widely used in multi storied factory building, storehouse, residential building, office and commercial and residential building.
The invention will be further described below in conjunction with drawings and Examples:
Fig. 1 is to use the elevator of the inventive method to promote the schematic diagram of floor.
Embodiment: make one deck floor, promote one deck floor immediately, concrete steps are:
(1), patten construction;
(2), the steel pipe column sleeve of first section two story height is installed;
(3), do the basic unit of bottom terrace;
(4), in basic unit, make first floor, the step of making floor: a, division grid, brushing interleaving agent; B, put formwork; C, cloth muscle and put embedded part, enhancing ring, pipeline; D, concreting; E, curing concrete are to reaching stretch-draw intensity; F, tensioned prestressing bar.
(5), elevator is installed, elevator 10 comprises lift carriage 1, guide rod 2, guide wheel 3, screw rod 4, hookup 5, earth anchor 6;
(6), step pitch such as each hoist point rises to first floor height, shutdown, lift-bolt self-locking synchronously, elevator is to promote synchronously with step pitches such as computer programme-control, promptly work as certain hoist point and be raised to a height earlier, stop, wait all to carry and a little all be raised to sustained height, begin the lifting of next height more simultaneously;
(7), build the cap concrete;
(8), the elevator counter-rotating is from being raised to second raised position;
(9), compound steel tubing string cover is installed;
(10), elevator, preparation lifting next time is installed;
(11), on first floor floor 7, make second layer floor 8;
(12), second layer floor 8 is promoted to second layer height 9, each floor plate is made and is promoted by that analogy;
(13), build the concrete in the steel pipe column sleeve, the concrete in the steel pipe column sleeve is successively to build or visual steel pipe bearing capacity is taked several layers of one-time-concreting or full height one-time-concreting.Concreting can pumping of concrete or is manually built.
Claims (5)
1, a kind of non-binding prestressed two-way rib floor structure storey-by-storey lift slab construction method is to make one deck floor, promotes one deck floor immediately, and concrete steps are:
(1), patten construction;
(2), the steel pipe column sleeve is installed;
(3), do the basic unit of bottom terrace;
(4), make first floor;
(5), elevator is installed;
(6), step pitch such as each hoist point promotes first floor synchronously to the first floor height;
(7), build the cap concrete;
(8), elevator is from being raised to second raised position;
(9), compound steel tubing string cover is installed;
(10), elevator, preparation lifting next time is installed;
(11), on the first floor floor, make second layer floor;
(12), second layer floor is promoted to second layer height, each floor plate is made and is promoted by that analogy;
(13), build the interior concrete of steel pipe column sleeve.
2, make the step of floor: a in the non-binding prestressed two-way rib floor structure storey-by-storey lift slab construction method according to claim 1, its described (4), (11), divide grid, brushing interleaving agent; B, put formwork; C, cloth muscle and put embedded part, enhancing ring, pipeline; D, concreting; E, curing concrete are to reaching stretch-draw intensity; F, tensioned prestressing bar.
3, non-binding prestressed two-way rib floor structure storey-by-storey lift slab construction method according to claim 1, it is characterized in that: elevator is to promote synchronously with step pitches such as computer programme-control in described (5), (6), promptly work as certain hoist point and be raised to a height earlier, stop, wait all to carry and a little all be raised to sustained height, begin the lifting of next height more simultaneously.
4, non-binding prestressed two-way rib floor structure storey-by-storey lift slab construction method according to claim 1 is characterized in that: the concrete in described (13) in steel pipe column sleeve is successively to build or visual steel pipe bearing capacity is taked several layers of one-time-concreting or full height one-time-concreting.
5, non-binding prestressed two-way rib floor structure storey-by-storey lift slab construction method according to claim 1 is characterized in that: the concreting in described (7), (13) is pumping of concrete or manually builds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01123983 CN1121539C (en) | 2001-08-10 | 2001-08-10 | Non-binding prestressed two-way rib floor structure storey-by-storey lift slab construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01123983 CN1121539C (en) | 2001-08-10 | 2001-08-10 | Non-binding prestressed two-way rib floor structure storey-by-storey lift slab construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1329201A true CN1329201A (en) | 2002-01-02 |
| CN1121539C CN1121539C (en) | 2003-09-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01123983 Expired - Fee Related CN1121539C (en) | 2001-08-10 | 2001-08-10 | Non-binding prestressed two-way rib floor structure storey-by-storey lift slab construction method |
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| CN (1) | CN1121539C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696607A (en) * | 2014-01-14 | 2014-04-02 | 中国矿业大学(北京) | Prestressed assembled board column structure with steel supports and construction method thereof |
| CN110485570A (en) * | 2019-08-07 | 2019-11-22 | 杨秀敏 | The support top circulatory system and three-dimensional prefabricated full prefabricated concrete structure method |
-
2001
- 2001-08-10 CN CN 01123983 patent/CN1121539C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103696607A (en) * | 2014-01-14 | 2014-04-02 | 中国矿业大学(北京) | Prestressed assembled board column structure with steel supports and construction method thereof |
| CN110485570A (en) * | 2019-08-07 | 2019-11-22 | 杨秀敏 | The support top circulatory system and three-dimensional prefabricated full prefabricated concrete structure method |
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| Publication number | Publication date |
|---|---|
| CN1121539C (en) | 2003-09-17 |
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