CN2214466Y - Tooth-surface reinforced concrete prefabricated slab - Google Patents

Abstract

The utility model relates to a tooth surface reinforced concrete prefabricated slab which belongs to the design of the improvement of building elements. The tooth surface prefabricated slab is characterized in that the prefabricated surface is provided with groove structures which are arrayed at intervals and alternate with each other; therefore, the cross section of the prefabricated slab forms a tooth-shaped section provided with tooth width (a), tooth height (b) and tooth space (c), and the tooth-shaped section alternates in a convex and concave mode. The utility model is produced by a prefabricated slab factory. The utility model works as a mould plate of a rear poured layer during a construction stage, and pours the rear poured layer directly after positioned. The rear poured layer connects single tooth surface prefabricated slabs into a whole so as to form an integral floorslab, and also connects the floorslab with a support element into a whole so as to form a vertical and horizontal structural system.

Description

Tooth-surface reinforced concrete prefabricated slab

The steel concrete flank of tooth precast plate that the utility model step reaches belongs to the improvement design of building unit.

In construction work, be extensive use of reinforced concrete prefabricated board and cast-in-place plate at present; Some engineering in some areas is also used the reinforced concrete sandwich plate.These floors have many advantages: extensive as material source, can gather materials on the spot; Durability, refractoriness, normability etc. are preferably arranged; Advantages such as the precast plate speed of application is fast for another example, and cast-in-place slab integral is good.Certainly these floors also have deficiency: poor as the precast plate globality; Cast-in-place plate speed of application is slow; And the superposed surfaces shear strength of superimposed sheet is low, and the pre-erection bending rigidity is little, need adopt special large-scale punching block and equipment etc.

At the existing deficiency of above-mentioned existing floor, the utility model is satisfying under the preceding topic of current national codes, on the prior art basis, a kind of existing floor advantage that promptly keeps has been proposed, overcoming the novel floor production program that remarkable result is arranged aspect their shortcomings again, the utility model purpose provides a kind of used steel concrete flank of tooth precast plate of this scheme of implementing.

Novel floor production program is that floor is made meshing plate, so-called meshing plate by steel concrete flank of tooth precast plate (hereinafter to be referred as flank of tooth precast plate) and after water overlapping layers (hereinafter to be referred as last layer) two parts and form, it also belongs to superposed member.Wherein flank of tooth precast plate is produced by precast yard, takes on the template of last layer in the construction stage, can directly build last layer in the above after in place.Last layer is linked to be integral body to monolithic flank of tooth precast plate, forms complete floor; Again floor is linked to be whole form vertical and horizontal structure system with supporting member.See that from the transversal section of the meshing plate of integral body the back pouring concrete as in the groove between the double wedge of ribs and two double wedges of flank of tooth precast plate resembles staggered being interlocked of two rows groove tooth very much, therefore this floor called after " the meshing floor of steel concrete " intuitively, be called for short meshing plate.Wherein the feature of flank of tooth precast plate is: the recess configurations that has on the precast plate plate face at regular intervals alternately makes the transversal section of precast plate form the alternate dentation of the convex-concave cross section with the facewidth (a), tooth depth (b) and between cog (c).

Fig. 1 is the organigram of this steel concrete flank of tooth precast plate.

Fig. 2 is meshing plate assembling schematic diagram.

Fig. 3 is that Fig. 2 A-A is to sectional drawing.

The embodiment that provides below in conjunction with accompanying drawing further describes.Referring to accompanying drawing, this flank of tooth precast plate (1) is by the concreting moulding, and flank of tooth precast plate (1) is for can be provided with reinforcing bar (2), and reinforcing bar (2) can adopt prestressed reinforcement or plain bars.This flank of tooth precast plate (1) is to have groove (3) structure that is parallel to each other and arranges at regular intervals with the precast plate difference of prior art on the plate face of flank of tooth precast plate (1), make the transversal section of flank of tooth precast plate (1) form the alternate dentation of the convex-concave cross section with the facewidth (a), tooth depth (b) and between cog (c).

Referring to Fig. 2, Fig. 3, making meshing board-like novel floor process with flank of tooth precast plate (1) is at first will to be placed on the supporting member (4) at the flank of tooth precast plate (1) that precast plate factory makes, so-called supporting member comprises superposed beam, body of wall or other supporting, be that mould carries out watering after cast in situs forms overlapping layers (5) ［ abbreviation last layer (5) ］ with flank of tooth precast plate (1) and supporting member (4) then, and make two or more flank of tooth precast plates (1), and supporting member (4) thus build up a whole novel floor of engaging type that forms each other, the transversal section of meshing plate is as shown in Figure 3.

Because precast plate will bear the deadweight of self and last layer (5) and the temporary load(ing) of constructing in the construction stage, so it must have enough thickness just can take on this.Last layer (5) will realize the flooring globality, guarantee floor rigidity, intensity and hold engineering property such as specialty of electric apparatus pipeline, also should possess certain thickness, and total floor thickness should be determined in the reasonable scope in actual engineering.Be difficult to satisfy simultaneously their these needs in this limited height, therefore there is contradiction in they on this problem of thickness, and this also is the main cause of existing superimposed sheet precast plate insufficient rigidity.And why this flank of tooth precast plate (1) can promptly satisfy the thickness of precast plate, guarantee the last layer engineering property again, at first be to be formed with the protruding flank of tooth (abbreviation double wedge) because this meshing plate flank of tooth precast plate (1) has groove (3) thereby constructs, and each double wedge is equivalent to arrange ribs on precast plate, this method utilizes rib height (double wedge) to increase the precast plate height in the part, and has improved the bending rigidity and the intensity of this flank of tooth precast plate on the whole by many ribs actings in conjunction.Because ribs (double wedge) only exists in the part, therefore can not reduce last layer thickness on the whole, opposite last layer (5) is that mould has formed reverse rib with flank of tooth precast plate (1), has also increased the effective height of self.Secondly from appearance, meshing plate does not exist only in the ribs (double wedge) of precast plate in helping height ［ double wedge tooth depth (b) ］ scope, the ribs that also has last layer, their engagements are arranged at interval, therefore do not resemble and with the superposed surfaces of level precast plate and last layer are separated fully the existing superimposed sheet, but use this height space of double wedge tooth depth (b) to hold mutually jointly, can utilize the between cog (c) of flank of tooth precast plate (1) to arrange pipeline again, make flank of tooth precast plate (1) and last layer (5) become unified and reinforcement mutually by the contradiction of correspondence.The publicly-owned property that rib is high is important feature of this meshing plate.

This meshing plate is finished by two-step pouring, the concrete of the two-step pouring co-operation that why can effectively combine, mainly due to have following four characteristics 1. the superposed surfaces of this meshing plate form by two parts.First is double wedge top and groove bottom land plane, i.e. the facewidth (a), and their area sum equals the superimposed area of known superimposed sheet; Second portion is the side of double wedge (rib), can see that by contrast this meshing plate utilizes the double wedge side to increase superimposed area, has the big characteristics of superimposed area.2. this superimposed of meshing plate is also developed on the degree of depth along the double wedge tooth depth not only at the planar development of double wedge tooth top and groove bottom land, has formed superimposed space in the tooth depth scope, and this meshing plate superimposed has spatiality.3. double wedge or rib are positioned at the middle part of meshing plate, and it half is on neutral line, and second half is below neutral line, no matter be subjected to the effect of plus or minus moment of flexure, always there is half rib height (double wedge tooth depth) to be in pressure zone.Rib produces lateral deformation under action of compressive stress, and adjacent both sides are compressed mutually, produces snap-in force by the artificial hair side of rib (double wedge) on vertical superposed surfaces, more effectively resists shearing, the deformation tendency of constraint superposed surfaces.Its superimposed characteristics are interlock.4. tooth (or rib) top and two sections horizontal superposed surfaces of groove bottom land lay respectively at following 1/3rd height of last 1/3rd and plate of plate, these two neutral lines of highly avoiding the shear stress maximum, be in the less vantage point of shear stress and normal stress, improved the condition of work of superposed surfaces.Have stressed little characteristics.

The meshing plate made from this flank of tooth prefabricated board relatively also has following advantage with existing various floors except keeping original advantage:

1, with existing prefabricated board relatively the cast-in-place mask of this meshing plate itself good continuity and horizontal rigidity are arranged, its overall performance, crack performance between anti-plate, anti-seismic performance significantly is better than precast floor slab.

2, with cast-in-situ floor relatively this meshing plate replace template with flank of tooth precast plate itself, do not need a large amount of formworks at the construction field (site), also colligation floor bottom layer of the reinforcing steel again, with this meshing plate save time, laborsaving, the few investment.

3, be that 2 times of superimposed sheet, flexural strength are about 1.5 times with this meshing flexural rigidity of a plate of existing superimposed sheet comparison.Bear the engineering load in one stage in the ordinary course of things, need not to establish interim support.The superimposed intensity of superimposed sheet is hanged down under the big situation of load need establish superimposed distributing bar, make troubles for prefabricated work, have only the large-scale punching block of employing and vibratory equipment just can produce, and the superimposed intensity height of this meshing plate, so can not establish the overlapping layers distributing bar in the ordinary course of things, be convenient to produce, promote, use.

Claims (1)

1, a kind of building reinforced concrete flank of tooth precast plate is characterized in that: the recess configurations that has on this precast plate face at regular intervals alternately makes the transversal section of precast plate form the alternate dentation of the convex-concave cross section with the facewidth (a), tooth depth (b), between cog (c).

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