CN102418425A - Prefabrication integral casting building structure system with cast-in-site haunched beams, and construction method for prefabrication integral casting building structure system - Google Patents

Prefabrication integral casting building structure system with cast-in-site haunched beams, and construction method for prefabrication integral casting building structure system Download PDF

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Publication number
CN102418425A
CN102418425A CN201010297722XA CN201010297722A CN102418425A CN 102418425 A CN102418425 A CN 102418425A CN 201010297722X A CN201010297722X A CN 201010297722XA CN 201010297722 A CN201010297722 A CN 201010297722A CN 102418425 A CN102418425 A CN 102418425A
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China
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haunched
cast
precast
place
girder
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CN201010297722XA
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Chinese (zh)
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CN102418425B (en
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杨峰
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杨峰
华汇工程设计集团有限公司
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Publication of CN102418425A publication Critical patent/CN102418425A/en
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Publication of CN102418425B publication Critical patent/CN102418425B/en

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Abstract

The invention discloses a prefabrication integral casting building structure system with cast-in-site haunched beams. The prefabrication integral casting building structure system comprises cast-in-site pillars, the cast-in-site haunched beams, prestress superposed beams, and cast-in-site floor slabs; each prestress superposed beam comprises a prestress prefabrication beam and a cast-in-site part, wherein the prestress prefabrication beam comprises a beam body and a prestress steel stranded wire which is embedded into the beam body and is taken as a main rib; a plurality of form erection holes are formed in the beam body in the longitudinal direction; the cast-in-site haunched beams are connected to an adjacent pillar along one direction; the prestress superposed beams comprise main beams and secondary beams; and the main beams are connected with the adjacent pillar which is vertical to the haunched beams in the other direction, and the secondary beams are connected with the haunched beams. The haunched beams are used as the main beams, so that the middle height of the main beams can be reduced effectively, and pipelines can be arranged on the middle parts of the beams; therefore, the story height of a building can be reduced. Through holes, through which the pipelines can pass, of the middle parts of the main beams can reduce the story height further.

Description

The integral precast house structural system and the job practices thereof of cast-in-place haunched beam
Technical field
The present invention relates to a kind of house structural system, relate in particular to a kind of house structural system that constitutes by beam, post, plate, and the job practices of building this system.
Background technology
In traditional integral precast structural system, the connected node complex structure of Liang Yuliang, globality is poor; For addressing this problem, the girder employing is cast-in-place usually, but its working procedure is many; And do not have corresponding construction equipment supporting in the construction, and compare with cast-in-place structural, there is not the advantage of duration, cost.In addition, in the structure design, the direction that span is big is a girder usually, and the direction that span is little is a secondary beam, and the advantage of prestressing force superposed beam is not in full use, and the height of cast-in-place girder is bigger, and the building floor height is strengthened.Also have the general floor of traditional integral precast structure to adopt superimposed sheet, syndeton is complicated, and cost is high, and globality is poor.At present, a kind of primary and secondary beam is basic, and girder adopts haunched beam with high, and the integral precast system that floor adopts no load-bearing to prop up module and cast-in-situ is not also appeared in the newspapers.
Summary of the invention
Technical problem to be solved by this invention is to overcome the deficiency of above-mentioned prior art, provides that a kind of floor height is little, anti-seismic performance good, speed of application is fast, the integral precast house structural system and the job practices thereof of the cast-in-place haunched beam of low cost of manufacture.
Integral precast house structural system according to a kind of cast-in-place haunched beam provided by the invention; Comprise cast-in-place post, cast-in-place haunched beam, prestressing force superposed beam and cast-in-situ floor; Said prestressing force superposed beam comprises prestressing force precast beam and cast-in-place part; Wherein said prestressing force precast beam comprises that Liang Tihe is embedded in the said beam body prestress wire as main muscle; Be vertically arranged with a plurality of nibs on the said beam body, said cast-in-place haunched beam is connected on the adjacent said post along a direction, and said prestressing force superposed beam is divided into girder and secondary beam; Said girder be used to connect with the perpendicular another one direction of said haunched beam on adjacent post, said secondary beam is connected with said haunched beam.
Integral precast house structural system according to a kind of cast-in-place haunched beam provided by the invention also has following attached technical characterictic:
Said post is the reinforcing bar concrete post that has connecting elements, and the end of said beam body is provided with shaped steel, and said shaped steel is connected with said connecting elements.
The middle part of said haunched beam is provided with the drawing-in wire through hole, and the aperture of said poling through hole is 100mm-400mm.
The span of said superposed beam is greater than the span of said haunched beam.
Said steel strand are embedded in the bottom of said beam body, and the top of said beam body also is embedded with prestressed high strength steel wire or the steel strand that adopt the pre-tensioning system construction, and the end of said steel strand is an enlarged footing.
The beam end of body of the precast beam of said girder is formed with breach in the steel strand extending area, and the beam end of body of the precast beam of said secondary beam is a dentalation.
Said floor is cast-in-place flat board or in-situ ribbed slab.
Job practices according to the integral precast house structural system of a kind of cast-in-place haunched beam provided by the invention comprises the steps:
Post is built in A, construction;
B, build haunched beam support for shuttering and bed die and precast beam adjustable prop;
C, the precast beam of girder and secondary beam is installed, the end of the precast beam of its middle girder and secondary beam is shelved under the beam on the adjustable prop;
The reinforcing bar of D, colligation haunched beam;
E, build haunched beam side template and slab form,
F, bundle muscle water concrete, and top master's muscle of colligation superposed beam is laid floor bar, and the concrete of connected node, haunched beam and floor between the cast-in-place part in the top of monobloc cast superposed beam, precast beam and the post is accomplished overall structure;
After G, form removal, concrete reach certain intensity, adjustable prop under stripping and the beam.
It further comprises following steps:
In steps A, post is provided with connecting elements, in step B, the shaped steel of the precast beam end of said girder is connected with the connecting elements of said post.
In step C, in a nib that props up nib and girder of secondary beam, connector is set, and on connector, the connection steel pipe is set longitudinally, the formwork truss is held on and connects on the steel pipe, on the formwork truss, lays wooden grid again, on wooden grid, builds slab form.
In step C, said slab form is the die mould steel form, in a nib that props up nib and girder of secondary beam, connector is set, and bar is shelved in setting longitudinally on connector, is shelving laying profiled sheet template on the bar again.
Integral precast house structural system according to a kind of cast-in-place haunched beam provided by the invention compared with prior art has following advantage:
At first, the present invention adopts haunched beam as girder, can effectively reduce the middle part height of girder, and be beneficial to pipeline and arrange at the middle part of beam, thus the floor height in reduction house.The drawing-in wire through hole at girder middle part can further reduce floor height.
Secondly, the present invention adopts the prestressing force precast beam in the big direction of span, because prefabricated depth of beam is less, steel using amount is economized, thereby has increased the clear height in house.On the little direction of span, adopt cast-in-place haunched beam as girder, the load of bearing is big, but span is little, can effectively reduce the steel using amount of haunched beam, and makes its beam middle part height approaching with precast beam, and clear height increases behind the feasible layout pipeline.
Once more, the present invention is provided with nib at Liang Tishang, and a nib can bear the concrete deadweight as the floor mould bases supporting member of construction stage with beam, has not only saved to land bearing frame, and slab form is removed ahead of time, improves all transfer efficients of template.In addition, precast beam is set up under the beam on the adjustable prop, good stability, and the construction stage place is spacious, convenient construction.
According to the job practices of the integral precast house structural system of a kind of cast-in-place haunched beam provided by the invention owing to adopted the hybrid combination of haunched beam, precast beam; Give full play to complex-shaped cast-in-place beam easy construction; And standardization secondary beam simple shape is fit to prefabricated characteristics, has given full play to cast-in-place and prefabricated advantage, adopts profiled sheet as the template in-situ ribbed slab; Cost is low, and speed of application is fast.
Description of drawings
Fig. 1 is a partial perspective view of the present invention, basic composition of the present invention shown in the figure.
Fig. 2 is the syndeton sketch map of secondary beam of the present invention and haunched beam.
Fig. 3 is the front view of middle girder of the present invention.
Fig. 4 is the stereogram of middle girder of the present invention.
Fig. 5 is the internal construction sketch map of middle girder of the present invention.
Fig. 6 is that middle girder of the present invention is looked sectional view on the left side of lead to the hole site.
Fig. 7 is that sectional view is looked on the left side, end of middle girder of the present invention, the structure of the net of pectination shown in figure sheet.
Fig. 8 is the end enlarged drawing of middle girder of the present invention.
Fig. 9 is the inner end portion structure enlarged drawing of middle girder of the present invention.
Figure 10 is the front view of secondary beam among the present invention.
Figure 11 is the stereogram of secondary beam among the present invention.
Figure 12 is the internal construction sketch map of secondary beam among the present invention.
Figure 13 is the left view of secondary beam among the present invention.
Figure 14 is the inner end portion structural representation of secondary beam among the present invention, the structure of the net of pectination shown in figure sheet.
Figure 15 is the end partial enlarged drawing in the secondary beam among the present invention.
Figure 16 is the inner end portion partial structurtes enlarged drawing in the secondary beam among the present invention.
Figure 17 is the front view of the another kind of embodiment of secondary beam among the present invention.
Figure 18 is the front view of center pillar of the present invention.
Figure 19 is the formwork sketch map among the present invention.
Figure 20 is the sketch map of the another kind of embodiment of haunched beam among the present invention.
The specific embodiment
Referring to Fig. 1, Fig. 2, Fig. 3 and Figure 10; The embodiment of the integral precast house structural system of a kind of cast-in-place haunched beam that provides in the present invention; Comprise cast-in-place post 200, cast-in-place haunched beam 600, prestressing force superposed beam and cast-in-situ floor 300; Said prestressing force superposed beam comprises prestressing force precast beam and cast-in-place part, and wherein said prestressing force precast beam comprises beam body 1 and is embedded in the said beam body 1 as the prestress wire 2 of main muscle, is vertically arranged with a plurality of nibs 4 on the said beam body 1; Said cast-in-place haunched beam 600 is connected on the adjacent said post 200 along a direction; Said prestressing force superposed beam is divided into girder 101 and secondary beam 102, said girder 101 be used to connect with the perpendicular another one direction of said haunched beam 600 on adjacent post 200, said secondary beam 102 is connected with said haunched beam 600.The present invention adopts haunched beam 600 to mix with superposed beam and takes structure, utilizes haunched beam as girder, can effectively reduce the middle part height of girder, and be beneficial to pipeline and arrange at the middle part of beam, thus the floor height in reduction house.Simultaneously, utilize the prestressing force precast beam of prestress wire as main muscle again, can reduce the steel using amount of main muscle and the height of beam body, precast beam is made in factory with the pretensioned prestressing technology, can be in factory mass production, thus reduce cost.
Superposed beam among the present invention can be supported on the post 200, also can be to be supported on the shear wall, and certainly, post 200 also can exist with shear wall simultaneously.
The so-called steel strand 2 of the present invention adopt many braided steel wires to form, and this kind steel strand 2 intensity are high, good toughness, and after adopting pre-tensioning system to stretch, the concrete of beam body can produce higher prestressing force.
Alleged superimposed prestressing force pre-erection and two parts of cast-in-place part of comprising of the present invention constitute, and in order to be beneficial to description, among the present invention the prestressing force pre-erection are referred to as the prestressing force precast beam.And in being described below, the beam body all refers to the beam body in the prestressing force precast beam.Description for girder all is meant the precast beam in the girder, all is meant the precast beam in the secondary beam for the description of secondary beam.The beam body 1 of precast beam is provided with stirrup 11, and the part of stirrup 11 is stretched out the upper surface of beam body 1, and the stirrup 11 that is retained in beam body upper surface is used for the reinforcing bar of the cast-in-place part of colligation superposed beam, and this cast-in-place part is built the formation integrative-structure with floor.
All superposed beams that are connected with post or shear wall are girder 101 in the present invention, and all superposed beams that are installed on the haunched beam are secondary beam 102.Girder can be slightly different on end construction with secondary beam, but its main formation is identical.Fig. 3 to Figure 17 is the structure chart of girder of the present invention 101 and secondary beam 102, and in describing hereinafter, girder 101 and secondary beam 102 are consistent for the label of same components, and no longer dated for the description of same section is main beam structure or inferior girder construction.
Referring to Fig. 5, Fig. 6 and Fig. 7 and Figure 12, Figure 13 and Figure 14, in the foregoing description that the present invention provides, said steel strand 2 adopt the pre-tensioning system construction to be embedded in the said beam body 1, and the quantity of said steel strand 2 is the 3-18 root.Specifically can be chosen as 4,6,8,12,16.Present embodiment middle girder and secondary beam are 4.Adopt pre-tensioning system can economize technologies such as accessory such as Decanning, ground tackle and grouting construction, practiced thrift cost greatly, it is convenient to construct, and is suitable for large-scale production.Steel strand 2 consumptions that adopt the pre-tensioning system construction to be embedded in the beam body 1 obviously reduce than traditional reinforcing bar steel using amount.The prestress wire precast beam is when putting, and beam is known from experience and produced antiarch, thereby can effectively reduce the amount of deflection of superposed beam, reduces deck-molding, and the prestressing force superposed beam is not with crack work, and beam rigidity is big, good endurance.
Referring to Fig. 3 to Fig. 6 and Figure 10 to Figure 12; In the foregoing description that the present invention provides, the end of said steel strand 2 has enlarged footing 23, and said enlarged footing 23 is anchored in the concrete of connected node; Can improve the anchoring property of steel strand greatly, thereby improve the overall performance of structure.
Referring to Fig. 6, Fig. 7 and Fig. 9 and Figure 12, Figure 13 and Figure 16; In the foregoing description that the present invention provides; 4 said steel strand 2 in girder and the secondary beam are embedded in the bottom of said beam body 1, and the top of said beam body 1 also is embedded with 2 prestress wires 21 that adopt the pre-tensioning system construction.4 steel strand in bottom are used to make precast beam to produce prestressing force in the present invention, and 2 steel strand 21 in top are used for the recurvation square of putting a generation of balance bottom steel strand 2, make beam body 1 upper surface avoid in the bottom producing when steel strand 2 are put the crack.For reduce upper steel twisted wire 21 when putting to the concrete local failure, can spiral hoop 22 be set in the position that upper steel twisted wire 21 stretches out beam body 1 end.Said spiral hoop 22 strengthens the local strength of its position, thereby can reduce the local destruction of 21 pairs of concretes of upper steel twisted wire.Certainly, said upper steel twisted wire 21 also can be high-tensile steel wires.
Referring to Fig. 1, in the foregoing description that the present invention provides, the middle part of said haunched beam 600 is provided with drawing-in wire through hole 601, and the aperture of said poling through hole 601 is 100mm-400mm.Present embodiment is 200mm.The present invention is provided with through hole 601 and is used to arrange the pipeline that passes haunched beam on haunched beam 600, make pipeline can press close to soffit, makes full use of structure space and arranges pipeline.
Referring to Fig. 1, in the foregoing description that the present invention provides, the span of said superposed beam is greater than the span of said haunched beam 600; Be that the present invention adopts the prestressing force precast beam in the big direction of span; Because prefabricated depth of beam is less, steel using amount is economized, thereby has increased the clear height in house.On the little direction of span, adopt cast-in-place haunched beam as girder, the load of bearing is big, but span is little, and beam width is big, can effectively reduce the steel using amount of haunched beam, and makes center height and precast beam approaching, makes to arrange clear height increase behind the pipeline.
Referring to Fig. 3 and Figure 10; In the foregoing description that the present invention provides; The present invention is provided with a nib 4 on the beam body 1 of girder 101 and secondary beam 102, said nib 4 is used to install the supporting member of slab form, and slab form and bracing frame are installed on the supporting member; Make the cast-in-situ floor template need not to be provided with to land bearing frame, accelerating construction progress.In addition, because of the deadweight of upper strata floor and working load can not be delivered to lower floor through landing bearing frame, therefore, lower floor's slab form can be removed after concrete reaches certain intensity in advance.Thereby improve all transfer efficients of template greatly, reduce form cost and use.Owing to need not to be provided with the intensive bearing frame such as scaffold that lands, make flooring spacious, be beneficial to carrying out synchronously and the construction equipment operation of other operations, improved the construction speed in house.
Referring to Fig. 3, Figure 10 and Figure 12; In the foregoing description that the present invention provides; On the said beam body 1 all nibs 4 are positioned on the same horizon, and said nib 4 is through hole, and all nibs 4 are arranged on the same horizon; Can guarantee that the template that is installed in nib 4 place is in same plane, thereby guarantee the planeness of whole floor.Said nib 4 is through hole, and the support member of template can directly pass, and shelves bar in the setting of the both sides of beam body, shelves bar and is used for mounting template or formwork-support.Certainly this nib 4 also can be arranged to blind hole, and is provided with respectively in the both sides of beam body, and this blind hole also can be used for mounting template.But being set, through hole is optimum scheme, easy to process, use also simpler.
Referring to Figure 15, in the foregoing description that the present invention provides, be provided with hollow pipe fitting 41 in said the nib 4, said pipe fitting 41 is beneficial to the shaping of said nib 4.When making precast beam, hollow pipe fitting 41 is pre-set, the two ends shutoff of pipe fitting 41.After building completion, form said nib 4.Said pipe fitting 41 together bury underground with beam body 1 in.Said pipe fitting 41 not only is beneficial to the shaping of a nib 4, reduces the pore-forming cost of a nib 4.And played protective effect in use to beam body 1, prevent of the wearing and tearing of support shuttering spare for beam body 1 concrete.
Referring to Figure 10 and Figure 15, in the foregoing description that the present invention provides, the diameter a of said nib 4 is 2cm-8cm, can elect 2cm, 4cm, 5cm, 6cm, 8cm as.The setting of said nib 4 can not be too big, if too big then be unfavorable for the installation of template assembly.Spacing c between adjacent said the nib 4 is 80cm-120cm, can elect 80cm, 90cm, 100cm, 110cm, 120cm as, and the selection of this spacing can guarantee the intensity that whole template supports.The distance b of the end face of the center of said nib 4 and said beam body 1 is 8cm-20cm.Can elect 8cm, 10cm, 13cm, 15cm, 17cm, 20cm as.Said nib 4 can not be too near from the end face of beam body 1, if too near then can influence the flexural strength of construction stage beam body 1.
Referring to Fig. 3 and Fig. 4, in the foregoing description that the present invention provides, the end of the beam body 1 of the precast beam in the said girder is formed with breach 12 in said steel strand 2 extending areas.Steel strand 2 of the present invention are positioned at the bottom of said beam body 1, thereby make the beam body have prestressing force.Because the end of beam body and the gap of external member are very little, can't make precast beam accurately in place after steel strand and external member are collided.For this reason, the present invention is provided with breach 12 in steel strand 2 extending areas of girder, and steel strand 2 appropriateness in breach 12 is crooked, thereby makes steel strand when colliding with external member, and it can bending avoid outside reinforcing bar.Referring to Fig. 3 and Fig. 4, the degree of depth of said breach 12 is 50mm-400mm.Present embodiment is 100mm, also can be chosen as 150mm, 200mm, 300mm and 400mm.This breach can satisfy the crooked needed space of steel strand.
Referring to Figure 10, Figure 11 and Figure 15; In the foregoing description that the present invention provides, the end of the beam body 1 of the precast beam in the said secondary beam is a dentalation, and dentalation is arranged in the end of beam body 1; The end and the haunched beam that can guarantee beam body 1 water when building up integral body, and the old and new's concrete binding ability improves.
Referring to Fig. 5 and Fig. 7 and Figure 12 and Figure 14; In the foregoing description that the present invention provides; The root of the said breach 12 of the Liang Tishang in the said girder is embedded with pectination net sheet 13, and said net sheet is converted into shape by the single steel bar Curved Continuous, and inserts in the space between the said steel strand 2.The end of Liang Tishang in the said secondary beam also is embedded with pectination net sheet 13, and this structure is identical with girder.In the foregoing description that the present invention provides, because bottom steel strand 2 produce local failure to beam body concrete when putting, said net sheet 13 can prevent that this position concrete from producing the crack.This net sheet is at least two, satisfies requirement of strength with this.To net sheet and be bent into pectination, and insert in the space between the steel strand 2.This structure can make steel strand 2 need not to pass this net sheet, is making Liang Tishi, can be earlier with steel strand tension, and then lay net sheet, convenient construction.
Referring to Fig. 5, Fig. 6, Fig. 7 and Figure 12, Figure 13 and Figure 14, the present invention buries sleeve pipe 5 underground in the end of the said beam body 1 of girder and secondary beam, makes part bottom steel strand 2 pass sleeve pipe 5.Sleeve pipe 5 is set, and when the production phase, can to effectively reduce the local prestressing force of beam end of body excessive, eliminates and should produce the crack in the place, owing to can reduce the recurvation square of beam end of body, makes the pre-tensile stress of end upper surface of beam body reduce, thereby prevent to produce the crack.And,, can prevent that beam end of body bottom concrete is destroyed less than the compressive strength of concrete after the compressive stress stack that negative moment of backing plate feasible and beam produces because the compressive pre-stress that the bottom, end of beam body produces is discharged by sleeve portion in operational phase.
Two ends at beam body 1 in the present embodiment all are provided with sleeve pipe 5, thereby the 2 pairs of stress that concrete caused stacks of bottom steel strand and the local stress of eliminating two ends of beam body are excessive.Make precast beam of the present invention to use, enlarged the scope of application in the earthquake zone.
Referring to Fig. 5, Fig. 6, Fig. 7 and Figure 12, Figure 13 and Figure 14, in the foregoing description that the present invention provides, said sleeve pipe 5 is a plastic bushing, the sleeve structure that perhaps is wrapped to form by outsourcing material.The quantity that is with the bottom steel strand 2 of said sleeve pipe 5 is less than sum, and promptly not all bottom steel strand 2 all are with sleeve pipe.In order to satisfy requirement of the present invention, the quantity of sleeve pipe 5 can be the 1/3-2/3 of steel strand quantity, and present embodiment then 2 two ends in four bottom steel strand 2 is provided with sleeve pipe 5.
Referring to Fig. 6 and Figure 13, in the foregoing description that the present invention provides, the said bottom steel strand 2 that are with sleeve pipe 5 on the width of said beam body 1 with the center line symmetric arrangement.Above-mentioned setting can guarantee the left and right sides stress balance of beam body 1, can not produce beam body 1 unbalance stress.
Referring to Fig. 5 and Fig. 9 and Figure 12 and Figure 16, in the foregoing description that the present invention provides, the total length of said sleeve pipe 5 is the 5%-15% of the total length of said beam body 1.The length of said sleeve pipe 5 is excessive, then can influence the prestressing force that beam body 1 is had, and therefore, the 5%-15% that sleeve pipe 5 total lengths at two ends is limited to the total length of beam body 1 can be good at addressing the above problem.Present embodiment is 7%.
Referring to Fig. 1 and Figure 18, in the foregoing description that the present invention provides, said post 200 is for having the reinforcing bar concrete post of connecting elements, and the reinforcing bar in the said reinforcing bar concrete post adopts steel pipe or H steel.This kind post 200 comprises cylinder 201 and is embedded in the main muscle 202 in the said cylinder 201; The junction with said girder 101 of said cylinder 201 is provided with connecting elements 203; Beam body 1 end of said girder 101 is provided with shaped steel 3, and said shaped steel 3 links together with said connecting elements 203.Can be placed on the post 200 when the invention enables girder 101 to install in the early stage, installation rate is accelerated greatly.When girder 101 and post 200 are cast in a time-out, this shaped steel 3 has improved the shear strength in this cross section, place greatly again as the shear key of the old and new's concrete bonding surface.
Referring to Fig. 3, Fig. 8 and Fig. 9, in the foregoing description that the present invention provides, the part that the shaped steel 3 of said girder 101 is placed on said beam body 1 accounts for the 1/3-1/2 that shaped steel is put in order length, and present embodiment is 1/3.This scope setting can guarantee the bonding strength of shaped steel 3 and beam body 1, guarantees the bonding strength with post simultaneously.The said shaped steel 3 that is embedded in the beam body 1 is step, under the prerequisite that does not influence bonding strength, the consumption of shaped steel is reduced.Shaped steel 3 of the present invention can be channel-section steel, steel plate, angle steel or i iron.Being placed on said beam body 1 outer said shaped steel 3 is provided with bolt hole 31 and/or is suitable for the perforation 32 that the outside column stirrup is walked.Said bolt hole 31 can be used for being connected with outside connected node, 32 is used for the prick post stirrup and bore a hole, and is beneficial to laying of tie muscle.After accomplishing whole watering,, make shaped steel become the shear key of the old and new's concrete bonding surface because shaped steel is connected with external member.
Referring to Figure 17; The end of the beam body of the precast beam of the secondary beam among the present invention also can be provided with said shaped steel 3; When the beam end of body and the haunched beam of the precast beam of secondary beam is cast in a time-out, this shaped steel 3 has improved the shear strength in this cross section, place greatly as the shear key of the old and new's concrete bonding surface.
Referring to Fig. 1, in the foregoing description that the present invention provides, said floor 300 is cast-in-place flat board or in-situ ribbed slab.The present invention adopts in-situ ribbed slab can effectively reduce the deadweight of floor, reduces the steel using amount of floor, and seismic load reduces.The cast-in-place part of connected node between said haunched beam 600, said floor 300, said precast beam and the said post 200 and superposed beam adopts integral cast-in-situ, thereby forms an overall structure.Make that globality of the present invention is better, anti-seismic performance is good.
Referring to Figure 20, other a kind of embodiment of the haunched beam that provides in the present invention, the haunch structure of this haunched beam does not tilt, but the right angle.Other structure is same as the previously described embodiments.
The job practices of the integral precast house structural system of the cast-in-place haunched beam that provides in the present invention comprises the steps:
Post is built in A, construction; Said post adopts cast-in-place processing technology to build, colligation post muscle at first, and mounting template is watered concrete, finally is built into rod structure.Post in the present embodiment has connecting elements, pre-buried connecting elements when building.This post also can be the post that does not have connecting elements.
B, build haunched beam support for shuttering and bed die and precast beam adjustable prop; Said adjustable prop is used to support precast beam, for the installation of precast beam provides support part.Simultaneously, when building the haunched beam support for shuttering, the bed die of haunched beam is built together in this step.Haunched beam support for shuttering and bed die are built between two little posts of span.
C, the precast beam of girder and secondary beam is installed, the end of the precast beam of its middle girder and secondary beam is shelved under the beam on the adjustable prop 506; Between the post and post with the another one direction that precast beam is lifted on and haunched beam is perpendicular of girder, the span between this post and the post is big.
The reinforcing bar of D, colligation haunched beam; Carry out the reinforcing bar of colligation according to the shape of haunched beam as main muscle.
E, build haunched beam side template and slab form, build whole template.
F, bundle muscle water concrete, and top master's muscle of colligation superposed beam is laid floor bar, and the concrete of connected node, haunched beam and floor between the cast-in-place part in the top of monobloc cast superposed beam, precast beam and the post is accomplished overall structure;
After G, form removal, concrete reach certain intensity, adjustable prop under stripping and the beam.
In step B, the shaped steel 3 of the precast beam end of said girder 101 is connected with the connecting elements 203 of said post.The present invention is provided with connecting elements 203 at the top of post, makes girder 101 when mounted, can be fixed on the post 200, is beneficial to the installation of girder 101.
Referring to Figure 19; In step C, in a nib 4 of secondary beam 102 and girder 101, connector is set, connector of the present invention is to be located in to cross steel pipe 505 in the nib; Connect steel pipe 501 crossing longitudinally to be provided with on the steel pipe 505; Formwork truss 502 is held on and connects on the steel pipe 501, on formwork truss 502, lays wooden grid 503 again, on wooden grid 503, builds slab form.
The present invention can also adopt other scheme in step C; In a nib 4 of secondary beam 102 and girder 101, connector is set; This connector is the steel pipe that crosses that is arranged in the nib, and shelves bar crossing longitudinally to be provided with on the steel pipe, is shelving the profiled sheet template of laying floor on the bar again.Present embodiment adopts the die mould steel form, and this die mould steel form is across on precast beam, and its bottom need not to be provided with support scaffolding, and therefore, this slab form construction is simple, and the die mould steel form number of turnover is many, and cost is low.

Claims (11)

1. the integral precast house structural system of cast-in-place haunched beam; It is characterized in that: comprise cast-in-place post, cast-in-place haunched beam, prestressing force superposed beam and cast-in-situ floor; Said prestressing force superposed beam comprises prestressing force precast beam and cast-in-place part; Wherein said prestressing force precast beam comprises that Liang Tihe is embedded in the said beam body prestress wire as main muscle; Be vertically arranged with a plurality of nibs on the said beam body, said cast-in-place haunched beam is connected on the adjacent said post along a direction, and said prestressing force superposed beam is divided into girder and secondary beam; Said girder be used to connect with the perpendicular another one direction of said haunched beam on adjacent post, said secondary beam is connected with said haunched beam.
2. the integral precast house structural system of cast-in-place haunched beam as claimed in claim 1, it is characterized in that: said post is the reinforcing bar concrete post that has connecting elements, and the end of said beam body is provided with shaped steel, and said shaped steel is connected with said connecting elements.
3. the integral precast house structural system of cast-in-place haunched beam as claimed in claim 1, it is characterized in that: the middle part of said haunched beam is provided with the drawing-in wire through hole, and the aperture of said poling through hole is 100mm-400mm.
4. the integral precast house structural system of cast-in-place haunched beam as claimed in claim 1, it is characterized in that: the span of said superposed beam is greater than the span of said haunched beam.
5. the integral precast house structural system of cast-in-place haunched beam as claimed in claim 1; It is characterized in that: the steel strand of said precast beam are embedded in the bottom of said beam body; The top of said beam body also is embedded with prestressed high strength steel wire or the steel strand that adopt the pre-tensioning system construction, and the end of said steel strand is an enlarged footing.
6. the integral precast house structural system of cast-in-place haunched beam as claimed in claim 1, it is characterized in that: the beam end of body of the precast beam of said girder is formed with breach in the steel strand extending area, and the beam end of body of the precast beam of said secondary beam is a dentalation.
7. the integral precast house structural system of cast-in-place haunched beam as claimed in claim 1, it is characterized in that: said floor is cast-in-place flat board or in-situ ribbed slab.
8. the job practices of the integral precast house structural system of cast-in-place haunched beam comprises the steps:
Post is built in A, construction;
B, build adjustable prop under haunched beam support for shuttering and bed die and the precast beam beam;
C, the precast beam of girder and secondary beam is installed, the end of the precast beam of its middle girder and secondary beam is shelved on the adjustable prop;
The reinforcing bar of D, colligation haunched beam;
E, build haunched beam side template and slab form,
F, bundle muscle water concrete, and top master's muscle of colligation superposed beam is laid floor bar, and the concrete of connected node, haunched beam and floor between the cast-in-place part in the top of monobloc cast superposed beam, precast beam and the post is accomplished overall structure;
After G, form removal, concrete reach certain intensity, adjustable prop under stripping and the beam.
9. the job practices of the integral precast house structural system of a kind of cast-in-place haunched beam as claimed in claim 8; It is characterized in that: in steps A; Post is provided with connecting elements, in step B, the shaped steel of the precast beam end of said girder is connected with the connecting elements of said post.
10. the job practices of the integral precast house structural system of a kind of cast-in-place haunched beam as claimed in claim 8; It is characterized in that: in step C; A nib and propping up in the nib of girder at secondary beam are provided with connector, and on connector, the connection steel pipe are set longitudinally, and the formwork truss is held on and connects on the steel pipe; On the formwork truss, lay wooden grid again, on wooden grid, build slab form.
11. the job practices of the integral precast house structural system of a kind of cast-in-place haunched beam as claimed in claim 8; It is characterized in that: in step C; Said slab form is the die mould steel form; A nib and propping up in the nib of girder at secondary beam are provided with connector, and bar is shelved in setting longitudinally on connector, are shelving laying profiled sheet template on the bar again.
CN201010297722.XA 2010-09-28 2010-09-28 Prefabrication integral casting building structure system with cast-in-site haunched beams, and construction method for prefabrication integral casting building structure system CN102418425B (en)

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CN103046645A (en) * 2012-08-16 2013-04-17 杨众 Large span prefabricated monolithic casting structure and construction method
CN103590487A (en) * 2013-11-14 2014-02-19 苏州工业园区设计研究院股份有限公司 Cast-in-place reinforced concrete haunched beam structure
CN106760110A (en) * 2016-12-30 2017-05-31 新蒲建设集团有限公司 Based on BIM profiled sheet armored concrete hollow sandwich floor construction engineering methods
CN107700648A (en) * 2017-10-23 2018-02-16 浙江展诚建设集团股份有限公司 Prefabricated component and cast-in-place post assembled integral concrete frame structure construction

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CN106760110A (en) * 2016-12-30 2017-05-31 新蒲建设集团有限公司 Based on BIM profiled sheet armored concrete hollow sandwich floor construction engineering methods
CN107700648A (en) * 2017-10-23 2018-02-16 浙江展诚建设集团股份有限公司 Prefabricated component and cast-in-place post assembled integral concrete frame structure construction

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