CN1318711C

CN1318711C - Construction of steel bar reinforced hollow concrete floor cast-in-situs

Info

Publication number: CN1318711C
Application number: CNB2005100202860A
Authority: CN
Inventors: 刘国模; 邸江枫
Original assignee: Individual
Current assignee: Guangsha Chongqing First Construction Group Co ltd
Priority date: 2005-01-28
Filing date: 2005-01-28
Publication date: 2007-05-30
Anticipated expiration: 2025-01-28
Also published as: CN1644834A

Abstract

The present invention belongs to the field of building construction, particularly to a making construction method of a cast-in-situ concrete hollow floor slab. The method uses flexible formed core dies which can be inflated and deflated, when floor slab steel bars are laid and installed, the formed core dies are equidistantly arranged in the floor slab steel bars along the direction of constructional steel bars and are parallel to forced steel bars. The formed core die is inflated and is concreted, and the combination position of every floor slab steel bar and every beam steel bar is left with a rear casting belt in advance. The gas in a capsule of the formed core die is discharged, the formed core die is drawn from reinforced concrete through the rear casting belt, and finally, the rear casting belt finishes casting. The cast steel bar concrete hollow floor slab made by using the method has the advantage that integrity, shock resistance, leakage prevention property, heat preservation property, heat insulation property, sound insulation property and moistureproof property are better. Hollow rate can reach 28.5 % to 39.6 %, a lot of concrete materials can be saved, and dead weight is light.

Description

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 moulding core that the present invention adopts 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 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 of making is cost-saved more than 18%.

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 moulding core used in the present invention (the moulding core is made up of capsule, overcoat and strip steel disc) after the capsule inflation.

The specific embodiment

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.

Claims

1, the making job practices of cast-in-situ reinforced concrete hollow floor, it is characterized in that: lay floor bar is installed, wherein parallel with the long limit of floor reinforcing bar is distributing bar (1), the reinforcing bar parallel with the floor minor face is steel bar stress (2), with moulding core (3) along distributing bar direction equidistant placement in floor bar and parallel with steel bar stress; This moulding core is tubular capsule (7) after by inflation, is sleeved on the outer cylinder-shaped coat (5) of capsule by what cloth or plastic sheeting were made, and strip steel disc (6) 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 (L), 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.