CN105178490A - Double-layer step-by-step laminated construction method of ultrahigh and ultrathick prestressed concrete floor - Google Patents
Double-layer step-by-step laminated construction method of ultrahigh and ultrathick prestressed concrete floor Download PDFInfo
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- CN105178490A CN105178490A CN201510477354.XA CN201510477354A CN105178490A CN 105178490 A CN105178490 A CN 105178490A CN 201510477354 A CN201510477354 A CN 201510477354A CN 105178490 A CN105178490 A CN 105178490A
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Abstract
The invention belongs to a double-layer step-by-step laminated construction method of an ultrahigh and ultrathick prestressed concrete floor; the use number of support frames and the layer number of lower end bearing load layers are calculated according to half weight of a design thickness of the ultrahigh and ultrathick prestressed concrete floor; and or, according to the use number of the support frames and the layer number of the lower end bearing load layers, the ultrahigh and ultrathick prestressed concrete floor is divided into 2-4 successive cast layers. The construction method is simple, practical, time-saved, labor-saved, low in cost, few in workers, low in use level of the support frames, firm, stable, low in construction cost, fast in construction speed, short in construction period and good in effect.
Description
Technical field
The invention belongs to a kind of superelevation super thick prestressed concrete floor slab double-deck substep superposed type construction method.
Background technology
At present, executive information systems thing often lower floor is commercial facility, and upper strata is house or office facility, due to the difference of its using function, causes the difference of building frame form.This building need arrange change-over panel so that the superstructure load of building is passed to its underpart structure between two kinds of form of structure.This change-over panel often absolute altitude high, from great, be also called superelevation, super thick prestressed concrete floor slab.This change-over panel adopts conventional construction method, the mould bases of at substantial is needed to support, the bracing frame of mould bases even needs directly successively to be supported to change-over panel floor from the sole plate of this building, with the huge load bearing this super thick, super thick concrete floor is built, and any single floor being positioned at change-over panel lower end all cannot bear the overweight load of change-over panel floor, thus bring larger artificial and material cost.To be positioned at the thick change-over panel supporting ten layers, two meters on the ground, if underground commerce facility is 7 Rotating fields, adopt the construction method of integrated support monobloc cast, bracing frame need from sole plate layer, successively install to conversion flaggy, namely the sole plate of 7 layers successively need install to conversion flaggy from underground, thus the overweight load of the thick change-over panel of two meters successively could be passed to the underground of sole plate, thus cause the installation of bracing frame, projects amount huge, expend fund large, employment is many, and speed of application is slow, and the construction period is long.
Summary of the invention
The object of this invention is to provide a kind of superelevation super thick prestressed concrete floor slab double-deck substep superposed type construction method, there is construction method simple and practical, time saving and energy saving, expense is few, and employment is few, and bracing frame consumption is few, firm stable, construction cost is low, and speed of application is fast, the advantage that the construction period is short and effective.
For this reason, method of the present invention comprises the steps:
(1) prepare before construction, according to the half weight of superelevation, super thick prestressed concrete floor slab design thickness, calculate the number of plies of bracing frame quantity used and lower end bearing load number layer, or design superelevation according to the number of plies of bracing frame quantity used and lower end bearing load number layer, super thick prestressed concrete floor slab is divided into the priority cast layer of 2 ~ 4 layers;
(2) according to the load of first watering lower-layer concrete of waiing upon casting concrete of superelevation, super thick prestressed concrete floor slab, bracing frame built by 2 ~ 3 neighbouring floor plates that this waits upon the bearing load layer watering floor lower end, and establishes support shuttering in the bracing frame upper end that this waits upon the floor watering underfloor end layer;
(3) reinforced frame of colligation superelevation, super thick prestressed concrete floor slab is set on the support shuttering of superelevation, super thick prestressed concrete floor slab, and formerly waters in lower-layer concrete the prestressed reinforcement line that this layer is set;
(4) lower-layer concrete is first watered to its design elevation with concrete casting, and make the upper surface of first watering lower-layer concrete be male and fomale(M&F), maintenance is carried out to the concrete of casting, after this layer concrete reaches 70 ~ 78% of design strength, the prestressed reinforcement line in this layer concrete of stretch-draw is to designing pulling force;
(5) formerly water lower-layer concrete to design strength 70 ~ 78% time, formerly water in the absolute altitude of the second step casting concrete layer of lower-layer concrete upper end and second layer prestressed reinforcement line be set;
(6) use concrete casting second step casting concrete layer to its design elevation, the upper surface of second step casting concrete layer is made to be male and fomale(M&F), maintenance is carried out to the concrete of casting, after this layer concrete reaches 70 ~ 78% of design strength, the prestressed reinforcement line in this layer concrete of stretch-draw is to designing pulling force;
(7) gross thickness repeating each layer concrete layer that step (6) is cast to priority reaches the design elevation of superelevation, super thick prestressed concrete floor slab, make superelevation, the upper surface of super thick prestressed concrete floor slab is plane, tear bracing frame and support shuttering open, complete the construction of superelevation, super thick prestressed concrete floor slab.
Described superelevation, super thick prestressed concrete floor slab are divided into the priority cast layer of 2 layers.Described male and fomale(M&F) or be corrugated surface.Described after this layer concrete reaches 75% of design strength, the prestressed reinforcement line in this layer concrete of stretch-draw is to designing pulling force.Described builds bracing frame on the 2 neighbouring floor plates that this waits upon the bearing load layer watering floor lower end.
When described superelevation, super thick prestressed concrete floor slab design thickness are 2m, superelevation, super thick prestressed concrete floor slab are divided into the priority cast layer of 2 layers; When superelevation, super thick prestressed concrete floor slab design thickness are greater than 3m, super thick prestressed concrete floor slab is divided into the priority cast layer of 3 ~ 4 layers.
Said method reaches object of the present invention.
It is simple and practical that the present invention has construction method, time saving and energy saving, and expense is few, and employment is few, and bracing frame consumption is few, firm stable, and construction cost is low, and speed of application is fast, the advantage that the construction period is short and effective.
According to test, the present invention can significantly reduce construction cost and constructor, and decline 70% compared with the construction cost of conventional method, the duration shortens 60%, also has construction quality good, the advantage that efficiency is high.
Accompanying drawing explanation
Fig. 1 is the structural representation first watering lower-layer concrete construction of the present invention.
Fig. 2 is structural representation of the present invention.
Detailed description of the invention
As shown in Figure 1 to Figure 2, a kind of superelevation super thick prestressed concrete floor slab double-deck substep superposed type construction method, the method comprises the steps:
(1) prepare before construction, according to the half weight of superelevation, super thick prestressed concrete floor slab 12 design thickness, calculate the number of plies of bracing frame 5 quantity used and lower end bearing load number layer.Or design superelevation according to the number of plies of bracing frame quantity used and lower end bearing load number layer, super thick prestressed concrete floor slab is divided into the priority cast layer of 2 ~ 4 layers.As: calculate superelevation, super thick prestressed concrete floor slab 12 design thickness half heavily for 2000T, the bearing load of each floor plate in its lower end is respectively 1000T, then need floor in its lower end 2 number of plies as bearing load number layer.According to analogizing, therefore be not repeated.
(2) according to the load of first watering lower-layer concrete 1 of waiing upon casting concrete of superelevation, super thick prestressed concrete floor slab.Bracing frame built by 2 ~ 3 neighbouring floor plates that this waits upon the bearing load layer watering floor lower end, and establishes support shuttering 4 in bracing frame 5 upper end that this waits upon the floor 6 watering underfloor end layer.
(3) reinforced frame 3 of colligation superelevation, super thick prestressed concrete floor slab is set on the support shuttering of superelevation, super thick prestressed concrete floor slab.And formerly water in lower-layer concrete the prestressed reinforcement line 2 that this layer is set.
(4) lower-layer concrete is first watered to its design elevation with concrete casting.And make the upper surface of first watering lower-layer concrete be male and fomale(M&F) 11, with facilitate this layer concrete and on it layer concrete to firmly.Maintenance is carried out to the concrete of casting.After this layer concrete reaches 70 ~ 78% of design strength, the prestressed reinforcement line in this layer concrete of stretch-draw is to designing pulling force.
(5) formerly water lower-layer concrete to design strength 70 ~ 78% time, formerly water in the absolute altitude of the second step casting concrete layer of lower-layer concrete upper end and second layer prestressed reinforcement line 21 be set.
(6) use concrete casting second step casting concrete layer to its design elevation, the upper surface of second step casting concrete layer is made to be male and fomale(M&F), maintenance is carried out to the concrete of casting, after this layer concrete reaches 70 ~ 78% of design strength, the prestressed reinforcement line in this layer concrete of stretch-draw is to designing pulling force;
(7) gross thickness repeating each layer concrete layer that step (6) is cast to priority reaches the design elevation of superelevation, super thick prestressed concrete floor slab 12.Make superelevation, the upper surface of super thick prestressed concrete floor slab is plane, tear bracing frame and support shuttering open, complete the construction of superelevation, super thick prestressed concrete floor slab.
Described superelevation, super thick prestressed concrete floor slab are divided into the priority cast layer of 2 layers.Described male and fomale(M&F) or be corrugated surface.Described after this layer concrete reaches 75% of design strength, the prestressed reinforcement line in this layer concrete of stretch-draw is to designing pulling force.Described builds bracing frame on the 2 neighbouring floor plates that this waits upon the bearing load layer watering floor lower end.
Shown in Fig. 1 to Fig. 2, be superelevation, super thick prestressed concrete floor slab is divided into the priority cast layer of 2 layers.According to the half weight of superelevation, super thick prestressed concrete floor slab 12 design thickness, calculate the number of plies of bracing frame 5 quantity used and lower end bearing load number layer, be usually no more than 2 layers.Bracing frame built by the 2 neighbouring floor plates that this waits upon the bearing load layer watering floor lower end, and establishes support shuttering 4 in bracing frame 5 upper end that this waits upon the floor 6 watering underfloor end layer.The support shuttering of superelevation, super thick prestressed concrete floor slab arranges the reinforced frame of colligation superelevation, super thick prestressed concrete floor slab, and formerly waters in lower-layer concrete the prestressed reinforcement line that this layer is set.Lower-layer concrete is first watered to its design elevation with concrete casting.And make the upper surface of first watering lower-layer concrete be male and fomale(M&F) 11, with facilitate this layer concrete and on it layer concrete to firmly.Maintenance is carried out to the concrete of casting.After this layer concrete reaches 75% of design strength, the prestressed reinforcement line in this layer concrete of stretch-draw is to designing pulling force.Formerly water lower-layer concrete to design strength 75% time, formerly water in the absolute altitude of the second step casting concrete layer of lower-layer concrete upper end and second layer prestressed reinforcement line 21 be set.With concrete casting second step casting concrete layer to the design elevation of superelevation, super thick prestressed concrete floor slab.Make superelevation, the upper surface of super thick prestressed concrete floor slab is plane, carry out maintenance to the concrete of casting, after this layer concrete reaches 75% of design strength, the prestressed reinforcement line in this layer concrete of stretch-draw is to designing pulling force.Tear bracing frame and support shuttering open, complete the construction of superelevation, super thick prestressed concrete floor slab.
When described superelevation, super thick prestressed concrete floor slab design thickness are 2m, superelevation, super thick prestressed concrete floor slab are divided into the priority cast layer of 2 layers; When superelevation, super thick prestressed concrete floor slab design thickness are greater than 3m, super thick prestressed concrete floor slab is divided into the priority cast layer of 3 ~ 4 layers.Therefore be not repeated.
In a word, it is simple and practical that the present invention has construction method, time saving and energy saving, and expense is few, and employment is few, and bracing frame consumption is few, firm stable, and construction cost is low, and speed of application is fast, the advantage that the construction period is short and effective.
Claims (6)
1. a superelevation super thick prestressed concrete floor slab double-deck substep superposed type construction method, is characterized in that: the method comprises the steps,
(1) prepare before construction, according to the half weight of superelevation, super thick prestressed concrete floor slab design thickness, calculate the number of plies of bracing frame quantity used and lower end bearing load number layer, or design superelevation according to the number of plies of bracing frame quantity used and lower end bearing load number layer, super thick prestressed concrete floor slab is divided into the priority cast layer of 2 ~ 4 layers;
(2) according to the load of first watering lower-layer concrete of waiing upon casting concrete of superelevation, super thick prestressed concrete floor slab, bracing frame built by 2 ~ 3 neighbouring floor plates that this waits upon the bearing load layer watering floor lower end, and establishes support shuttering in the bracing frame upper end that this waits upon the floor watering underfloor end layer;
(3) reinforced frame of colligation superelevation, super thick prestressed concrete floor slab is set on the support shuttering of superelevation, super thick prestressed concrete floor slab, and formerly waters in lower-layer concrete the prestressed reinforcement line that this layer is set;
(4) lower-layer concrete is first watered to its design elevation with concrete casting, and make the upper surface of first watering lower-layer concrete be male and fomale(M&F), maintenance is carried out to the concrete of casting, after this layer concrete reaches 70 ~ 78% of design strength, the prestressed reinforcement line in this layer concrete of stretch-draw is to designing pulling force;
(5) formerly water lower-layer concrete to design strength 70 ~ 78% time, formerly water in the absolute altitude of the second step casting concrete layer of lower-layer concrete upper end and second layer prestressed reinforcement line be set;
(6) use concrete casting second step casting concrete layer to its design elevation, the upper surface of second step casting concrete layer is made to be male and fomale(M&F), maintenance is carried out to the concrete of casting, after this layer concrete reaches 70 ~ 78% of design strength, the prestressed reinforcement line in this layer concrete of stretch-draw is to designing pulling force;
(7) gross thickness repeating each layer concrete layer that step (6) is cast to priority reaches the design elevation of superelevation, super thick prestressed concrete floor slab, make superelevation, the upper surface of super thick prestressed concrete floor slab is plane, tear bracing frame and support shuttering open, complete the construction of superelevation, super thick prestressed concrete floor slab.
2. method according to claim 1, is characterized in that: described superelevation, super thick prestressed concrete floor slab are divided into the priority cast layer of 2 layers.
3. method according to claim 1, is characterized in that: described male and fomale(M&F) or for corrugated surface.
4. method according to claim 1, is characterized in that: described after this layer concrete reaches 75% of design strength, the prestressed reinforcement line in this layer concrete of stretch-draw is to designing pulling force.
5. method according to claim 1, is characterized in that: described builds bracing frame on the 2 neighbouring floor plates that this waits upon the bearing load layer watering floor lower end.
6. method according to claim 1, is characterized in that: when described superelevation, super thick prestressed concrete floor slab design thickness are 2m, superelevation, super thick prestressed concrete floor slab are divided into the priority cast layer of 2 layers; When superelevation, super thick prestressed concrete floor slab design thickness are greater than 3m, super thick prestressed concrete floor slab is divided into the priority cast layer of 3 ~ 4 layers.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115162618A (en) * | 2022-08-01 | 2022-10-11 | 中国建筑第八工程局有限公司 | High-altitude super-thick prestress conversion plate structure construction reinforcing device and method |
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Cited By (2)
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| CN115162618A (en) * | 2022-08-01 | 2022-10-11 | 中国建筑第八工程局有限公司 | High-altitude super-thick prestress conversion plate structure construction reinforcing device and method |
| CN115162618B (en) * | 2022-08-01 | 2023-10-20 | 中国建筑第八工程局有限公司 | Construction reinforcing device and method for high-altitude super-thick prestressed conversion plate structure |
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