The making job practices of cast-in-situ reinforced concrete hollow floor
Technical field
The invention belongs to the realm of building construction, be specifically related to a kind of making job practices of cast-in-situ reinforced concrete hollow floor.
Technical background
In building trade, the reinforced concrete floor plate has two kinds of form of structure, and a kind of is the prestressed reinforced concrete cassette ceiling, and another kind is the cast-in-situ steel reinforced concrete solid floor.It is assembled by the some prestressed reinforced concrete cassette ceilings of making in advance adopting the flooring of prestressed reinforced concrete cassette ceiling, the heat insulating ability of this kind structure floor, thermal insulation, sound insulation and moisture resistance are better, and saving concrete material, but its globality, shock resistance and antiseep are poor, ftracture easily between plate and the plate.The cast-in-situ steel reinforced concrete solid floor that generally adopts is to lay floor bar is installed between Liang Yuliang now, carry out concreting again, make flooring form a whole reinforced concrete slab, because this kind floor is to build at the scene, can not adopt as the mode of prestressed reinforced concrete cassette ceiling and loose core, so this kind floor is solid plate body, its globality, shock resistance and antiseep are good, but owing to be solid plate body, its heat insulating ability, thermal insulation, sound insulation and moisture resistance are relatively poor, and expend Reinforced Concrete Materials, from great and uneconomical.
Summary of the invention
The making job practices that the purpose of this invention is to provide a kind of cast-in-situ reinforced concrete hollow floor is to make the cast-in-situ reinforced concrete hollow floor.
The making job practices of cast-in-situ reinforced concrete hollow floor of the present invention is: lay floor bar is installed, wherein parallel with the long limit of floor reinforcing bar is a distributing bar, the reinforcing bar parallel with the floor minor face is steel bar stress, with the moulding core along distributing bar direction equidistant placement in floor bar and parallel with steel bar stress; This moulding core is tubular capsule after by inflation, is sleeved on the outer cylinder-shaped coat of capsule by what cloth or plastic sheeting were made, and the strip steel disc composition that is axially fixed in the overcoat inner surface along overcoat, the capsule closed at both ends, a blind end setting therein has the valve of one way valve; Build carrying out floorslab concrete after the inflation of the capsule in the moulding core, and in floor bar and beam steel binding site reservation ater-casting, after the discharge of the gas in the moulding core capsule, the moulding core is extracted out through the ater-casting from steel concrete, after the concrete initial set expiration, finished building of ater-casting.
The making construction of cast-in-situ reinforced concrete hollow floor of the present invention can also be carried out by the following method: lay floor bar is installed, wherein parallel with the long limit of floor reinforcing bar is a distributing bar, the reinforcing bar parallel with the floor minor face is steel bar stress, with the moulding core along distributing bar direction equidistant placement in floor bar and parallel with steel bar stress; This moulding core is by pvc pipe and be tubular capsule after being positioned at wherein inflation and form, the capsule closed at both ends, and a blind end setting therein has the valve of one way valve; Build carrying out floorslab concrete after the inflation of the capsule in the moulding core, and in floor bar and beam steel binding site reservation ater-casting, after the discharge of the gas in the moulding core capsule, capsule is extracted out through the ater-casting in pvc pipe, finish building of ater-casting in the phase at concrete initial set.
The moulding core that the present invention adopts in a kind of method before above-mentioned is made up of capsule, overcoat and the strip steel disc that is fixed on the overcoat inner surface, when capsule is full of gas, the capsule of bulging will support overcoat makes the moulding core form the cylinder bodily form, and the strip steel disc that is fixed on the overcoat inner surface will make this one-tenth core mold be equipped with certain rigidity, pressure when enabling to bear concreting is realized building of floorslab concrete; And after the gas in the capsule is discharged, because capsule and overcoat are made by the flexibility material, and the strip steel disc also has certain pliability, can carry out largely curved around, so floor build finish after, this moulding core can be easily extracted out through the ater-casting in steel concrete, thereby realizes building and loosing core of in-situ reinforced concrete slab, and the moulding core can use repeatedly.
The moulding core that the present invention adopts in a kind of method in above-mentioned back is made up of pvc pipe and capsule, builds at steel concrete and finishes the back and only capsule extraction in the steel concrete also can be used repeatedly, and pvc pipe then forever is retained in the steel concrete.Because pvc pipe self has certain rigidity, and when capsule is full of gas, the capsule of bulging will play a supportive role to pvc pipe, pressure when enabling to bear concreting, realize building of floorslab concrete, and just because of the supporting role of capsule is arranged, make this pvc pipe can adopt thin wall type tubing, thereby reduce the cost of pvc pipe; After the gas in the capsule is discharged, because capsule is made by the flexibility material, can in steel concrete, extract out easily, thereby realize building and loosing core of in-situ reinforced concrete slab through the ater-casting.
The cast-in-situ reinforced concrete hollow floor that adopts the method for the invention to make possesses the advantage of prestressed reinforced concrete cassette ceiling and cast-in-situ steel reinforced concrete solid floor simultaneously, its globality, shock resistance, antiseep, heat insulating ability, thermal insulation, sound insulation and moisture resistance are all better, its hollow rate can reach 28.5%~39.6%, can save a large amount of Reinforced Concrete Materials, from heavy and light; The cast-in-situ reinforced concrete hollow floor that adopts above-mentioned preceding a kind of method to make is cost-saved more than 18%, and is though the cast-in-situ reinforced concrete hollow floor that adopts a kind of method in above-mentioned back to make has used Thin-Wall PVC tubing, also cost-saved more than 6%.
Description of drawings
Now in conjunction with the accompanying drawings the present invention is described in further detail.
Fig. 1 makes the schematic diagram of cast-in-situ reinforced concrete hollow floor for adopting the method for the invention;
Fig. 2 is the sectional view of A-A line among Fig. 1;
Fig. 3 is the cross-sectional view of the above-mentioned preceding employed moulding core of a kind of method (the moulding core is made up of capsule, overcoat and strip steel disc) after the capsule inflation;
Fig. 4 is the cross-sectional view of the above-mentioned back employed moulding core of a kind of method (the moulding core is made up of pvc pipe and capsule) after the capsule inflation.
The specific embodiment
Embodiment one:
As shown in Figure 1 and Figure 2, the making job practices of this cast-in-situ reinforced concrete hollow floor is:
1, lay lower floor's reinforcing bar that floor bar is installed, wherein parallel with the long limit of floor reinforcing bar is a distributing bar (non-stress reinforcing bar) 1, the reinforcing bar parallel with the floor minor face is steel bar stress 2, many locating rings 4 are equidistantly placed (locating ring quantity is decided according to steel bar stress length) along steel bar stress 2, form a location circular row, and along the such location circular row (the locating ring number of columns is decided according to distributing bar length) of distributing bar 1 equidistant placement multiple row, moulding core 3 is through respectively locatees in the circular row, re-lay the top reinforcement that floor bar is installed, and each locating ring 4 colligation is fixed on the distributing bar 1 of top reinforcement, be located at, between lower floor's reinforcing bar with last, lower floor's reinforcing bar is vertical.As shown in Figure 3, described moulding core 3 is tubular capsule 7 after by inflation, is sleeved on the outer cylinder-shaped coat 5 of capsule 7 by what cloth or plastic sheeting were made, and four strip steel discs, 6 compositions that are axially fixed in overcoat 5 inner surfaces along overcoat 5, article four, strip steel disc 6 is distributed on overcoat 5 inner surfaces, capsule 7 closed at both ends, a blind end setting therein has the valve of one way valve, can inflate to capsule 7 by this valve, and the gases in the capsule 7 can be given off.With the capsule in the moulding core 37 inflation, capsule 7 is propped up overcoat 5 makes moulding core 3 be cylinder, then this moulding core 3 along distributing bar 1 direction equidistant placement in floor bar and parallel with steel bar stress 2;
2, carry out floorslab concrete and build, and reserve ater-casting L, temporarily concreting not at floor bar and beam steel binding site;
3, the gas in the moulding core capsule 7 is discharged, and moulding core 3 is extracted out through ater-casting L from steel concrete;
4, after the concrete initial set expiration, finish building of ater-casting L.
Embodiment two:
As shown in Figure 1 and Figure 2, the making job practices of this cast-in-situ reinforced concrete hollow floor is:
1, lay lower floor's reinforcing bar that floor bar is installed, wherein parallel with the long limit of floor reinforcing bar is a distributing bar (non-stress reinforcing bar) 1, the reinforcing bar parallel with the floor minor face is steel bar stress 2, many locating rings 4 are equidistantly placed (locating ring quantity is decided according to steel bar stress length) along steel bar stress 2, form a location circular row, and along the such location circular row (the locating ring number of columns is decided according to distributing bar length) of distributing bar 1 equidistant placement multiple row, moulding core 3 is through respectively locatees in the circular row, re-lay the top reinforcement that floor bar is installed, and each locating ring 4 colligation is fixed on the distributing bar 1 of top reinforcement, be located at, between lower floor's reinforcing bar with last, lower floor's reinforcing bar is vertical.As shown in Figure 4, described moulding core 3 is by pvc pipe 8 and be tubular capsule 7 after being positioned at wherein inflation and form, capsule 7 closed at both ends, and a blind end setting therein has the valve of one way valve, can inflate to capsule 7 by this valve, and the gases in the capsule 7 can be given off.With the capsule in the moulding core 37 inflation, make capsule 7 supports be pressed in pvc pipe 8 inner surfaces, then this moulding core 3 along distributing bar 1 direction equidistant placement in floor bar and parallel with steel bar stress 2;
2, carry out floorslab concrete and build, and reserve ater-casting L, temporarily concreting not at floor bar and beam steel binding site;
3, the gas in the moulding core capsule 7 is discharged, and capsule 7 is extracted out through ater-casting L in pvc pipe 5;
4, finish building of ater-casting L in the phase at concrete initial set.