A kind of cast-in-place steel reinforced concrete cavity building roof
The present invention relates to a kind of building structure, relate to the cast-in-situ concrete cavity building roof that a kind of building constructions contains shaped steel specifically.
Present architectural construction building, what adopt basically is monolithic reinforced concrete structure, steel work, steel reinforced concrete structure, encased structures, cast-in-situ reinforced concrete hollow floor and cast-in-situ steel reinforced concrete hollow floor system etc., steel work and steel reinforced concrete structure system developed rapidly in the last few years, the mode that adopts mainly is at present, do skeleton with shaped steel, with profiled sheet instead of part tension distributing bar and superstructure template, the method is better and bearing capacity is strong than bar construction toughness of concrete.But profiled sheet must be placed in the top flange of section steel beam; common tensile reinforcement is subjected to the constraint of shaped steel web; also can only be arranged in the top flange plate of shaped steel; cast-in-place steel concrete contact surface on shaped steel is little; prevent that displacement welding cylindrical head bolt from stipulating the position; particularly the shaped steel web and up and down the frange plate place of exposing need be coated with the fireproof paint protection, building costs is big, the superstructure sound insulation is poor.
Publication number be CN1310276A patent disclosure a kind of, on shaped steel, lay profiled sheet, on profiled sheet, manufacture hollow building cover then again, this mode makes that the weight capacity of superstructure is big, but the superstructure that builds up like this also has the shaped steel that protrudes below it, and must be coated with fire proofing material above the shaped steel, increased profiled sheet, all increased cost, and difficulty and expenditure have also been increased for later stage finishing, the increase that this structure is also indirect the height of whole building, and height in hand does not increase, so structure is not fitted up and has been influenced attractive in appearance.
The patent disclosure of publication number CN1766252A a kind of shaped steel web stretch out the shaped steel top flange plate, its projection engrail, when superstructure is poured into a mould, its zigzag partly is cast in inside the superstructure, though this scheme has been strengthened the conjugation between superstructure and the shaped steel, but the method is made flexible connection with shaped steel, and it is made with installation all will spend more time and cost.And can not use existing product, and the bottom flange of shaped steel still protrudes in the bottom wing listrium face of superstructure.
Summary of the invention
In order to address the above problem, the invention provides a kind of in light weight, shaped steel and concrete is combined, the section steel beam fireproof performance is good, reduce floor height, the cast-in-place cavity building roof that cost is low.
The present invention adopts following scheme to realize: a kind of cast-in-place steel reinforced concrete cavity building roof, comprise top flange plate, the bottom wing listrium, template below the bottom wing listrium, on, the voided layer of forming by hollow body between the bottom wing listrium, girt strip between each hollow body, its improvement is, also comprise the shaped steel that is cast in the concrete in the described superstructure, described shaped steel is by the top flange, web and bottom flange are formed, leave the through hole or the fixed component that pass through for the girt strip bottom reinforcement bars on the described web, described girt strip upper reinforcement is by top, shaped steel top flange and form intersection, the top flange of described shaped steel, web and bottom flange inwall are wrapped up by concrete; Described girt strip and girt strip intersect in length and breadth and constitute the grid of laying hollow body.
Another way of the present invention is: the bottom wing listrium face of shaped steel recessed in superstructure bottom wing listrium face and apart from superstructure bottom wing listrium bottom surface in 18 millimeters.
Another mode of the present invention is: described superstructure bottom wing listrium face is positioned at shaped steel web place, and the bottom surface, bottom flange of shaped steel protrudes from superstructure bottom wing listrium face.
An embodiment more of the present invention is: described hollow body comprises base plate, framework and top cover, described plate outer surface has two camber projectioies at least, have relative hole on described base plate and the top cover, hole on the described base plate is arranged on the recess between its surperficial arc, described base plate is connected by the sealing penetrating via with the hole of top cover, described hollow body and penetrating via are integral sealing, and the height of described base plate circular arc type is less than the thickness of superstructure bottom wing listrium and less than 18 millimeters.
Another optimal way of the present invention is: between the base plate of hollow body and superstructure template gauze wire cloth or glass fabric are set, the concrete mortar of capacity is infiltrated in base plate camber projection and superstructure die clearance, base plate and gauze wire cloth or glass fabric are cast for one, form superstructure bottom wing listrium.
An also optimal way of the present invention is: described hollow body adopts the special cement mortar to make, and is added with the lining thing in the middle of the described special cement mortar, and described lining thing is glass fiber or cloth.
An optimal way more of the present invention is: described hollow body penetrating via mid diameter equates that the place that the hole on two ends and top cover, the base plate joins has at least an end to zoom into bell mouth shape.
Another optimal way of the present invention is: supporter also is installed in the described hollow body, and above support is connected with top cover, base plate, and the upper surface of described top cover has arc convex.
An optimal way more of the present invention is: described hollow body adopts the monoblock foamed plastics to make.It is characterized in that the upper surface of described hollow body and the penetrating via between the soffit adopt reserve or dig up in the middle of foamed plastics realize, at least two the arc soffits of described hollow body and the distance of superstructure template are greater than 3 millimeters, the rarest two the camber projectioies of described base plate, few 3 millimeters of the thickness of the aspect ratio superstructure bottom wing listrium of described arc convex, and the thickness of superstructure bottom wing listrium is less than 18 millimeters.
Another optimal way of the present invention is: described girt strip is fixed the scaffold of itself and superstructure template below by iron wire, and described fixedly iron wire fixed point is distributed in the relevant place of whole superstructure.
Another optimal way of the present invention is: be placed with pre-pipe laying or junction box in the described girt strip, described shaped steel comprises channel-section steel, T steel or i iron.
The present invention adopts the hole of passing through of reserving the girt strip lower rebar in the web of shaped steel, top flange plate, web, the bottom wing listrium inwall of shaped steel are cast in the superstructure, make shaped steel abdominal cavity concrete become as a whole, strengthened the stiffness of shaped steel with whole superstructure concrete.And top flange plate with shaped steel, web, bottom wing listrium inwall is enclosed in the superstructure, not be used in shaped steel and smear fire proofing material in appearance again, reached cost-effective purpose, and with shaped steel directly as the part of superstructure, significantly reduced the difficulty of floor construction, the hollow body base plate adopts at least two arc convex that concrete mortar is infiltrated between hollow body and the superstructure template fully, keep the smooth of the stability of hollow body and superstructure soffit, by the through hole in the middle of the hollow body, can easily and effectively concrete mortar be poured between base plate and the superstructure lower floor from top cover always, eliminated the problem that the middle concrete mortar of hollow body of the prior art can not pour into fully, utilize the supporter in the hollow body, can improve the ability of anti-roof pressure of hollow body and side pressure, whole hollow body all seals except the penetrating via hole, can prevent that like this concrete mortar from entering, and avoids increasing the weight of whole superstructure from the slit.Penetrating via is made horn-like with the place that top cover and base plate hole join in the middle of the hollow body, so just increased contacting of hollow body penetrating via and concrete mortar, the punching press on superstructure upper strata and the stress of lower floor are all produced very big effect, make the hollow body except utilizing the special cement mortar, in the less demanding superstructure of some load-bearing, can adopt organic materials such as foam-plastic blocks or inorganic material to make some lighter hollow body or solids, in concrete mortar, add and serve as a contrast the various resistances that thing can strengthen hollow body, as bump, extruding etc., the lifting surface area of the whole hollow body of decomposition that the top cover employing arc convex of hollow body can be suitable.
The cast-in-place cavity building roof of this programme, reducing girt strip reaches in light weight, rational in infrastructure, improves whole anti-crack and earthquake-resistant effect, hollow body in this programme utilizes mould to create in the shortest time, and when partly solidifying, it just top cover or side plate and framework or rectangular phantom are lumped together, save the time, cancelled in the prior art coating adhesive and other adds the formality of overlapping layers.Superstructure bottom surface with above-mentioned hollow body cast-in-site is smooth, only needs a simple finishing to use, and has removed prior art and need plaster and decorate the formality of filling a vacancy.
Description of drawings
Superstructure bottom wing listrium schematic diagram is protruded in Fig. 1 shaped steel bottom flange
Fig. 2 shaped steel bottom flange is encapsulated in schematic diagram in the superstructure bottom wing listrium
Fig. 3 hollow body schematic diagram, A are that all to be with arc convex, penetrating via two ends all be the bell mouth shape schematic diagram in the above and below, B be top for plane and penetrating via one end be the bell mouth shape schematic diagram.
Fig. 4 shaped steel schematic diagram, A are left view, and B has the stereogram of through hole for the shaped steel web
Fig. 5 hollow body template schematic diagram
The specific embodiment
The present invention is described further below in conjunction with accompanying drawing.
As shown in Figure 4, the medium-sized ladle of this programme is drawn together channel-section steel, i iron or T steel, shaped steel 1 have the through hole 31 that passes for girt strip 6 lower rebar at shaped steel belly 12 by the position of the thickness of laying superstructure and its girt strip 6, see Fig. 4 B, or at the relative position set bolt of shaped steel belly 12, lower rebar 3 with girt strip is welded on the bolt again, or installs and fixes the device of reinforcing bar at the relative position of shaped steel belly 12, as support, snap close etc.
As Fig. 3 A, shown in the B, hollow body in this programme is to utilize mould once to carry out, the hollow body material generally adopts special cement to make base-material, in the middle of special cement, add just like glass fiber, glass fabric or gauze wire cloth one class lining thing, to strengthen the soundness of hollow body, crushing resistance, do two or three or four arcs of outside protrusion in the bottom surface 11 of hollow body, this arc can contact with 7 one-tenth points of wire gauze of 5 layings of superstructure bottom wing listrium when hollow body is placed, multi sphere shape can make hollow body bottom 11 form the passage that infiltrates concrete mortar, and this scheme can realize that the bottom surface of bottom wing listrium 5 is smooth.The bottom surface arc of hollow body is symmetric arrays, and the size of its arc can be with the size adjustment of manufacturing hollow body, and is big as far as possible under the preceding topic of the passage of guaranteeing to infiltrate the concrete placing mortar, thus the concrete mortar amount in the minimizing girt strip.Symmetric points between bottom surface 11 arcs and the arc are provided with hole, also are provided with hole correspondingly on top covers 18, and its top cover 18 is connected by connecting pipe 9 with the hole of base plate 11.Also seal between connecting pipe 9 and the whole hollow body, concrete mortar enters in the hollow body in the time of can preventing to be in the milk like this, causes superstructure weight to increase.Can be by the size of hollow body, connecting pipe 9 numbers between increasing up and down, connecting pipe 9 one can be discharged the air that produces when hollow body is placed on fluid concrete on the template, two can make the concrete mortar bottom surface that flows to hollow body easily and fast, and three can strengthen the support of superstructure upper strata and lower floor.Make connecting pipe and upper and lower hole joint or a place radial tubaeform, can increase the contact surface of penetrating via and concrete mortar, increasing is to the support of the upper and lower frange plate of superstructure and fixing, flush shear force and stress to the upper and lower frange plate of superstructure all produce very big effect, the supporter 15 of various structures when can not satisfying construction positive pressure and side pressure, can be installed in hollow body hollow body, if anti-normal pressure and lateral pressure up and down, preferably adopt criss-cross iris type, this structure can all prop up the pressure of each frame face of hollow body.
As shown in Figure 5, the making mould structure of used hollow body is as follows in this programme, it comprises top side template 20, top template 21, following side form piece 23, soffit formwork 22, left side template 26 and right side template 27, when cast with top side template 20, top template 21, following side template 23 and soffit formwork 22 connect into a row with connector 29 successively, left side template 26, right side template 27 puts aside separately, concrete mortar is spread one deck earlier on mould, put one or more layers cloth then on demand, fibre or nonwoven come the intensity of stiffener, again remaining concrete mortar is spread, in smearing the process of slurry, carry out microseismic activity, strengthen the density between the concrete mortar, when the concrete mortar initial set, soffit formwork 22 and top template 21 following avris templates 23 are turned up for supporting the bottom surface, the limit of the top side template folded up 20 with soffit formwork 22 linked together with connector 29, form the four sides framework of mould, the outside of initial set is smeared the penetrating via mould 28 of concrete mortar and lining thing 17, insert the hole A16 on top template 21 and the soffit formwork 22, in the B10, then with the joint compacting, again left side template 26 and right side template 27 are bumped into the mould framework, allow its edge concrete mortar directly and framework glue together, after concrete mortar solidifies fully, remove penetrating via mould 9 successively, top side template 20, top template 21, soffit formwork 22, left side template 26, right side template 27, take away and solidify good empty stomach mould, finish the manufacturing of a hollow body.
The hollow body of this programme also can adopt the monoblock foamed plastics to make.The upper surface of hollow body and the penetrating via between the soffit adopt reservation or dig up middle foamed plastics and realize, the arc soffit of hollow body and the distance of superstructure template are greater than 3 millimeters, and the height of base plate camber projection is less than the thickness of superstructure bottom wing listrium and less than 18 millimeters.
The specific embodiment one, as shown in Figure 1, this programme is the situation that is higher than superstructure when shaped steel 1: after the steel column framework of building is built up, when building superstructure, superstructure template 4 is laid in left and right side at girder shaped steel 1, on superstructure template 4, repave the last layer gauze wire cloth then, also can spread glass fabric or cloth one class lining thing, girt strip 6 lower rebar 3 that to arrange by design drawing again, from the preformed hole 31 of shaped steel 1 web 12, pass, the mode of welding again after long reinforcing bar can adopt and block is installed, the upper reinforcement of girt strip 6 passes through from 14 tops, shaped steel 1 top flange, last girt strip 6 forms the grid in length and breadth of hollow body size, in grid, lay hollow body then, the hollow body base plate 11 of band multi sphere face is placed on the lining thing above the superstructure template 4, re-lay the reinforcing bar in the cavity building roof top flange plate 8, simultaneously a bearing diagonal face is built to superstructure soffit formwork 4 places in 13 edges, shaped steel 1 bottom flange, to increase the contact surface of shaped steel and steel concrete, set aside pre-embedded pipe and junction box are placed in girt strip 6 cage of reinforcement, dilute concrete mortar with concrete spreader at girt strip 6 middle berth one decks, allow the dilution concrete mortar penetrate into the hollow body bottom, under the sharp pounding of building shock club, make concrete mortar be circulated into base plate 11 and mobile to base plate center connecting pipe 9 from the outer all around of hollow body, the height of base plate camber projection is less than the thickness of superstructure bottom wing listrium 5 and less than 18 millimeters, for preventing the concrete mortar leakiness between base plate 11 and the construction formwork 4, can from the connecting pipe 9 of hollow body, inject concrete mortar, to build shock club simultaneously and vertically insert sharp pounding in the connecting pipe 9, allow concrete mortar again to diffusion all around, concrete mortar is under the effect of building shock club, combine closely and form superstructure bottom wing listrium 5, concrete mortar pumps in superstructure top flange plate 8 reinforcing bars 2 and girt strip 6 frameworks in batches subsequently, with closely knit voided layer and the top flange plate 8 that forms by a plurality of hollow bodies of building shock club device vibrations, at last with top flange plate 8 surface level levellings.For preventing that hollow body from the time floating in cast, must carry out anti-floating and handle, superstructure is fixed together the scaffold below girt strip 6 usefulness iron wires and the superstructure template 4 when cast-in-place, waits the superstructure template 4 cast-in-place steel reinforced concrete cavity building roof of realization afterwards of dismantling after the concrete setting.
Embodiment two: as shown in Figure 2, this programme is lower than the situation of superstructure bottom wing listrium for girder shaped steel, be with the main distinction of a last embodiment, superstructure template 4 be positioned at shaped steel 1 bottom, 13 bottom surface, bottom flange and with 18 millimeters of shaped steel 1 distances, the lining thing that gauze wire cloth is laid also be positioned at shaped steel 1 below, the superstructure bottom wing listrium of being made up of hollow body bottom surface arc height 5 maintains an equal level with 13 bottom surfaces, shaped steel bottom flange, and the superstructure that pours at last forms smooth " no beam " the cast-in-place die concrete cavity building roof in bottom surface.
Should be noted that at last: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although the present invention is had been described in detail with reference to the foregoing description, those of ordinary skill in the field are to be understood that: still can make amendment or be equal to replacement the specific embodiment of the present invention, and the end breaks away from any modification of spirit and scope of the invention or is equal to replacement, and it all should be encompassed in the middle of the claim scope of the present invention.