CN101839033A - Closed-section profiled steel sheet-concrete combined floor and construction method thereof - Google Patents

Abstract

The invention relates to a closed-section profiled steel sheet-concrete combined floor and a construction method thereof. The combined floor comprises a closed-section profiled steel sheet and concrete cast on the closed-section profiled steel sheet which is laid on steel beams of a steel structure main body, the bottom of the closed-section profiled steel sheet is fixedly connected with the steel beams, a top support is erected under the closed-section profiled steel sheet between steel beams, a lower iron forced bar is arranged in each wave trough of the closed-section profiled steel sheet, and an upper iron forced bar is correspondingly arranged above each lower iron forced bar, connected with the lower iron forced bar by a tensile bar and erected on an upper iron distribution bar into a groined shape. In the invention, the closed-section profiled steel sheet is also utilized as a floor bottom die to save construction material. By using the construction method, the construction period can be shortened, the cost can be decreased, the structural bearing force requirement is met, and the construction quality is ensured so that the invention is particularly suitable for public construction structures with high fireproof requirement.

Description

Closed-section steel deck-concrete combined floor and job practices thereof

Technical field

The present invention relates to a kind of floor framing, superstructure and job practices thereof in particularly a kind of steel building.

Background technology

In the construction of construction work, because the design difference of engineering structures, except that the concrete building structures of widespread usage, the application of steel work is more and more, and especially steel work had obtained the development of advancing by leaps and bounds in China in recent years in the public building design.

Traditional concrete structure superstructure has been difficult to adapt to the demand of modern architecture construction because the circulation material input is many, the reinforcing bar materials are big, form of construction work is complicated.At present the profiled sheet that uses of building has advantages such as light unit weight, intensity height, construction be quick, is good constructional materials and member.Profiled sheet can combine with concrete and make composite floor, can save wooden form and can be used as load-carrying members.But problems such as that existing profiled sheet also exists in construction is not good with the concrete structure binding ability, amount of reinforcement big, structural strength and fireproof performance are bad, influence is used.

Summary of the invention

The invention provides a kind of closed-section steel deck-concrete combined floor and job practices thereof, solve the problem that stress performance is bad, construction material consumption is big of existing profiled sheet and concrete combined floor.

The technical solution adopted for the present invention to solve the technical problems is: this closed-section steel deck-concrete combined floor, comprise closed-section steel deck and the concrete that is cast on the closed-section steel deck, described closed-section steel deck is layed on the girder steel of steel work main body, fixedly connected with girder steel in the bottom of closed-section steel deck, closed-section steel deck below between the girder steel has been set up and has been shored, be provided with a following iron principal rod in each wave trough of closed-section steel deck, and correspondence is provided with iron principal rod on above every following iron principal rod, socket by lacing wire between following iron principal rod and the last iron principal rod, last iron principal rod is erected on the iron distribution bar, and the two sets up into groined type.

Described closed-section steel deck one side has overhanging button limit, stretches the button limit in opposite side has, and the del that is intervally distributed with the end opening closure between the button limit of both sides is pressed rib.

Described closed-section steel deck is fixing by peg and girder steel welding.

Described shore to set up by horizontal support bar, vertical rod form, and between vertical rod top and closed-section steel deck bottom, be placed with flitch.

The job practices of this closed-section steel deck-concrete combined floor, construction sequence is as follows: step 1, lay closed-section steel deck on the girder steel of steel work main body, set up below the closed-section steel deck between the girder steel and shore.

After step 2, closed-section steel deck are laid and finished, that closed-section steel deck is fixing with peg and girder steel welding.

Step 3, in each wave trough of closed-section steel deck, place a following iron principal rod, and below reinforcing bar, place the concrete cover cushion block.

Step 4, above following iron principal rod corresponding place one on the iron principal rod, will go up the iron principal rod and be erected on the iron distribution bar.

Step 5, after down iron principal rod and last iron principal rod are in place, the two is socketed fixing by lacing wire.

Step 6, to reinforcing bar, shore check and accept again errorless after, concreting on closed-section steel deck.

The maintenance of sprinkling water after step 7, the concrete final set, curing time must not be less than 7 days.

Step 8, treat that concrete reaches design limit compressive strength after, dismounting is shored.

Beneficial effect of the present invention is as follows: closed-section steel deck-concrete combined floor of the present invention, closed-section steel deck directly plays the double floor bottom mould effect of serving as except that as the structure construction material, saves template.In addition, closed-section steel deck fire endurance height, after floor was finished, the sprayed fire proofing coating again in closed-section steel deck bottom played the effect of protection environment, and fireproof performance was good.Simultaneously, the pressure rib of closed-section steel deck plays action of steel bars, therefore, places a following iron principal rod and can satisfy structural requirement in each wave trough of closed-section steel deck, has reduced amount of reinforcement, saves steel, thereby makes this composite floor weight reduction.Because closed-section steel deck is connected on the girder steel by nail solder, peg has played the effect of transmitting the concrete shearing, and span 〉=3m between the girder steel, so only need the closed-section steel deck bottom between girder steel to set up support system, easy construction one.

Closed-section steel deck-concrete combined floor has been broken the floor slab construction mode of traditional concrete structure, embodied and utilized the double construction advantages such as floor bottom mould of doing of closed-section steel deck, it is good to have saved construction material, the weight reduction of floor, floor stress performance.This job practices can shorten the construction period, reduce construction cost, satisfies the structural bearing force request simultaneously, guarantees workmanship, is particularly useful for the high public building structure of fire protection requirement.

Description of drawings

The present invention is further described below in conjunction with drawings and Examples.

Fig. 1 is a structural representation of the present invention.

Fig. 2 is the structural representation of A-A section among Fig. 1.

Fig. 3 is the structural representation of closed-section steel deck.

Reference numeral: 1-girder steel, 2-peg, 3-closed-section steel deck, 3.1-del are pressed and are stretched iron principal rod, the last iron principal rod of 5-, 6-concrete, the last iron distribution bar of 7-, 8-lacing wire, 9-flitch, 10-horizontal support bar, 11-vertical rod under button limit, the 4-in rib, the overhanging button of 3.2-limit, 3.3-wave trough, the 3.4-.

The specific embodiment

Embodiment is referring to Fig. 1, shown in Figure 2, this closed-section steel deck-concrete combined floor, comprise closed-section steel deck 3 and the concrete 6 that is cast on the closed-section steel deck, described closed-section steel deck 3 is layed on the girder steel 1 of steel work main body, fixedlyed connected with girder steel 1 by peg 2 in the bottom of closed-section steel deck 3, closed-section steel deck 3 belows between the girder steel have been set up and have been shored, be provided with a following iron principal rod 4 in each wave trough 3.3 of closed-section steel deck 3, and correspondence is provided with iron principal rod 5 on above every following iron principal rod 4, socket by lacing wire 8 between following iron principal rod 4 and the last iron principal rod 5, last iron principal rod 5 is erected on the iron distribution bar 7, and the two sets up into groined type.

Referring to shown in Figure 3, described closed-section steel deck 3 one sides have overhanging button limit 3.2, stretch button limit 3.4 in opposite side has, and the del that is intervally distributed with the end opening closure between the button limit of both sides is pressed rib 3.1.

The job practices of this closed-section steel deck-concrete combined floor, construction sequence is as follows: step 1, on the girder steel 1 of steel work main body, lay closed-section steel deck 3, setting up to shore below the closed-section steel deck between the girder steel 3 (shores the same with conventional template supporting way, to establish relatively independent horizontal support bar 10 during support, vertical rod 11 and add an amount of bridging, and placing flitch 9 between vertical rod top and the closed-section steel deck bottom on closed-section steel deck before people's operation, to check conscientiously whether support is firm, can hurt sb.'s feelings after infallible and make peg and carry out reinforcement construction).

After step 2, closed-section steel deck are laid and finished, that closed-section steel deck 3 usefulness pegs 2 are fixing with girder steel 1 welding.

Step 3, place a following iron principal rod 4 in each wave trough of closed-section steel deck, and place the concrete cover cushion block below reinforcing bar, cushion block is quincuncial arrangement, and every 20-30cm arranges one.

Step 4, above following iron principal rod 4 corresponding place one on iron principal rod 5, will go up iron principal rod 5 and be erected on the iron distribution bar 7.

Step 5, after following iron principal rod 4 and last iron principal rod 5 are in place, the two is socketed fixing by lacing wire 8.

Step 6, to reinforcing bar, shore check and accept again errorless after, concreting 6 on closed-section steel deck.

The maintenance of sprinkling water after step 7, concrete 6 final set, curing time must not be less than 7 days.

Step 8, treat that concrete reaches design limit compressive strength after, dismounting is shored.

Claims (4)

1. closed-section steel deck-concrete combined floor, comprise closed-section steel deck (3) and be cast in concrete (6) on the closed-section steel deck, it is characterized in that: described closed-section steel deck (3) is layed on the girder steel (1) of steel work main body, fixedly connected with girder steel (1) in the bottom of closed-section steel deck (3), closed-section steel deck between the girder steel (3) below has been set up and has been shored, be provided with a following iron principal rod (4) in each wave trough (3.3) of closed-section steel deck (3), and correspondence is provided with a upward iron principal rod (5) above every following iron principal rod (4), socket by lacing wire (8) between following iron principal rod (4) and the last iron principal rod (5), last iron principal rod (5) is erected on the iron distribution bar (7), and the two sets up into groined type;

Described closed-section steel deck (3) one sides have overhanging button limit (3.2), stretch button limit (3.4) in opposite side has, and the del that is intervally distributed with the end opening closure between the button limit of both sides is pressed rib (3.1).

2. closed-section steel deck-concrete combined floor according to claim 1 is characterized in that: described closed-section steel deck (3) is fixing with girder steel (1) welding by peg (2).

3. closed-section steel deck-concrete combined floor according to claim 1, it is characterized in that: described shoring by horizontal support bar (10), vertical rod (11) set up and formed, and is placed with flitch (9) between vertical rod (11) top and closed-section steel deck (3) bottom.

4. job practices as closed-section steel deck-concrete combined floor any as described in the claim 1～3 is characterized in that construction sequence is as follows:

Step 1, go up at the girder steel (1) of steel work main body and to lay closed-section steel deck (3), the closed-section steel deck between girder steel (3) below is set up and is shored;

After step 2, closed-section steel deck are laid and finished, that closed-section steel deck (3) is fixing with girder steel (1) welding with peg (2);

Step 3, in each wave trough of closed-section steel deck, place a following iron principal rod (4), and below reinforcing bar, place the concrete cover cushion block;

Step 4, correspondingly in following iron principal rod (4) top place one and go up iron principal rod (5), will go up iron principal rod (5) to be erected on the iron distribution bar (7);

Step 5, after down iron principal rod (4) and last iron principal rod (5) are in place, the two is socketed fixing by lacing wire (8);

Step 6, to reinforcing bar, shore check and accept again errorless after, concreting on closed-section steel deck (6);

The maintenance of sprinkling water after step 7, concrete (6) final set, curing time must not be less than 7 days;

Step 8, treat that concrete reaches design limit compressive strength after, dismounting is shored.

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