CN208618627U - A kind of precast floor slab and its connection structure - Google Patents

Abstract

The utility model relates to a kind of precast floor slab and its connection structures, precast floor slab includes floor modules, connection reinforcing bar is fixed on two opposite all sides of floor modules, connection reinforcing bar stretches out the fixed enlarged footing in end of floor modules, and the size of enlarged footing is greater than the outer diameter of connection reinforcing bar.The first post-cast strip is reserved between two adjacent precast floor slabs, two opposite connection reinforcing bars are connected using sleeve in two neighboring precast floor slab, and the mounting hole being adapted to enlarged footing outer end diameter is opened up on sleeve.The advantages of there is manufactured precast floor slab adjacent floor deck to be easy to connect using the above structure, good integrity.

Description

A kind of precast floor slab and its connection structure

Technical field

The utility model relates to assembled architecture fields, and in particular to a kind of precast floor slab and its connection structure.

Background technique

Currently, the construction of building floor mainly uses cast-in-place, three kinds of modes of traditional precast hollow slab and prefabricated superimposed sheet.

One, cast-in-place is to carry out reinforcing bar binding and concreting at the scene to the wallboard, floor and beam column construction of building. Although the good advantage of the building good integrity that this mode is constructed into, shock resistance, there are many disadvantages, illustrate as Under:

1, the circulation materials such as a large amount of templates and support frame are needed, waste is big, not environmentally；

2, scene is divided into the multiple working procedures such as template installation, reinforcing bar binding, casting concrete and maintenance, and difficulty of construction is big, and It is influenced by weather, construction quality is difficult to control, and be easy to cause cracking, influences service life, reduces shock resistance；

3, since process is more, and cast-in-place concrete needs to reach the construction that just can be carried out superstructure after some strength, Long construction period；

4, since process is more, live cross-operation is interfered with each other, dangerous, not environmentally；

5, since cast-in-place reinforced concrete structure is from great, the span of floor is limited: 4 meters of plate cast-in-place structural have reached To the limit, nine-squares beam structure also at most can only achieve 6 meters, and nine-squares beam structure thickness is larger, affect the clear height in room.

Two, traditional precast hollow slab is to realize industrialization in factory process, is not limited by season and weather when having processing The advantages that system, quality can guarantee, save a large amount of templates and support.

But existing precast hollow slab is as shown in figure 44, disadvantage is as follows:

1, the surrounding of prefabricated board is smooth surface, after being overlapped on beam, is not connected between contiguous prefabricated plate, so globality Difference, shock resistance substantially reduce, and may be only available for low-rise building；

2, after contiguous prefabricated plate splicing, perforative splicing seams up and down is formed, the sky of cracking, leakage and decorative layer is easy to happen Drum cracking；

3, due to being not provided with transverse steel in existing cassette ceiling, so its restricted width, general only 1.2 meters；

4, the processing for also needing to carry out decorative layer and fireprotection layer after existing cassette ceiling is installed, causes secondary construction.

Three, prefabricated superimposed sheet floor is divided into two parts composition, and bottom is pre-erection (as shown in figure 45), mostly thin plate, Factory process is completed, transport to on-site hoisting it is in place after, the binding of secondary reinforcing bar and top concrete plate are carried out in prefabricated plate face Layer pours.Overlapping plate technique is generallyd use by existing assembled architecture, first is that because prefabricated board part can be used as Bars In Poured Concrete Slab Bottom template use, saved template；Second is that because top Bars In Poured Concrete Slab is whole face plate, and reinforcing bar mutually sockets, so phase Than the good integrity of traditional precast hollow slab.But it has the following disadvantages:

1, since laminated floor slab is double-layer structure, so its thickness is thicker than cast-in-situ floor, so that raw material are increased, from Increase again, reducing can bearing load and shock resistance；

2, double panel structure is easy hollowing cracking at binder course, and secondary pouring quality is not easy to control, is easy to appear The common quality defects such as cracking；

3, construction site should lift, cast-in-place again, and process is more, and construction is complicated；

4, since there are in-situ layers, so upper layer knot just can be carried out after in-situ layer intensity can only be waited to reach certain requirement The construction of structure, so long in time limit；

5, it since it is from great, so span is limited, can be only applied in residential housing at present, for underground garage, quotient The buildings such as field are not applicable.

Utility model content

The purpose of the utility model is to provide a kind of precast floor slab and its connection structures, are easy to connect with adjacent floor deck It connects, the advantages of good integrity.

The above-mentioned technical purpose of the utility model has the technical scheme that a kind of precast floor slab, packet Floor modules are included, floor modules are fixed with connection reinforcing bar on two opposite all sides, and connection reinforcing bar stretches out the end of floor modules Enlarged footing is fixed in portion, and the size of enlarged footing is greater than the outer diameter of connection reinforcing bar.

Further, in floor modules with connect parallel reinforced steel bar fixation deformed bar.

Further, connection reinforcing bar part it is pre-buried or it is elongated be arranged in floor modules.

Further, embedded bar rack in floor modules.

Further, bar frame includes upper steel mesh, the lower steel mesh parallel with upper steel mesh, upper steel mesh and lower steel Spacer bar net is connected between muscle net, spacer bar net vertical support is between upper steel mesh and lower steel mesh.

Further, the circumferential lateral surface of the floor modules all side pre-buried transverse steel vertical with reinforcing bar is connect.

Further, the upper surface of floor modules is fixed with decorative layer and/or wearing layer；The lower surface of floor modules is fixed There are insulating layer and/or fireprotection layer and/or puigging.

By above technical scheme, adjacent precast floor slab is linked together well, improves the globality of floor, And sleeve connection structure converts the pressure to the concrete of cylinder for the pulling force of splice, in turn using clamping principle On conduction to cylinder, connection is stronger, solves the problems, such as that traditional precast hollow slab globality and shock resistance are poor.

The another object of the utility model is to provide a kind of connection structure of precast floor slab comprising above-mentioned prefabricated building Plate, reserves the first post-cast strip between two adjacent precast floor slabs, two opposite connection reinforcing bars in two neighboring precast floor slab It is connected using sleeve, the mounting hole being adapted to enlarged footing outer end diameter is opened up on sleeve.

Further, sleeve misplaces arrangement in the first post-cast strip.

Further, the also fixed auxiliary dowel in the side of two neighboring precast floor slab, auxiliary dowel stretch out prefabricated building Hook part is arranged in the end of plate, passes through several hook parts in the first post-cast strip and elongated reinforcing bar is arranged.

The setting of hollow structure alleviates self weight, improves shock resistance and sound insulation, thermal insulation property, and save material, environmental protection.

Deformed bar is set in precast floor slab, increases plate span of slab, and save steel, reduce cost, improves The ductility and shock resistance of floor can be suitable for the building of the large spatial structures such as business, industry, storage and underground parking.

Precast floor slab is processed into heat preservation, decoration integrated board, scene does not need the secondary construction of large area, reduces levelling The work such as layer, decoration, insulating layer.Precast floor slab is integrated prefabricated, batch production processing, saves material, construction efficiency height, duration It is short, at low cost, good economy performance.

In conclusion the utility model has the following beneficial effects:

1, the structure light wt, high-strength, and connected using connection reinforcing bar with sleeve technology, good integrity, shock resistance is good；

2, hollow structure section village leads 40% or more, and sound-insulating performance is good；Heat preservation decoration integrative solves concrete and opens Problem is split, durability is good, reduces secondary operation, shortens the duration；

3, precast floor slab is high from heavy and light, intensity, and span is big, and applicable range is wide；

4, when site operation, rise without waiting for concrete strength, can work continuously, substantially shorten the construction period.

Detailed description of the invention

Fig. 1 is the structure chart of precast floor slab in embodiment one；

Fig. 2 is to be elongated reinforcing bar and the precast floor slab schematic diagram made for display connection reinforcing bar；

Fig. 3 is to be U-shaped and the precast floor slab schematic diagram made for display connection reinforcing bar；

Fig. 4 is that deformed bar is located at the schematic diagram close to lower surface in precast floor slab；

Fig. 5 is deformed bar structural schematic diagram arranged up and down in precast floor slab；

Fig. 6 is the structural schematic diagram that deformed bar end connects enlarged footing；

Fig. 7 is the schematic diagram of setting transverse steel in precast floor slab；

Fig. 8 is the schematic diagram of embedded bar rack in precast floor slab；

Fig. 9 is the schematic diagram that support unit is in U-shape in bar frame；

Figure 10 is that unit schematic diagram triangular in shape is made in bar frame；

Figure 11 is the schematic diagram of the pre-buried U-shaped reinforcing bar in all sides of hollowcore precast floor；

Figure 12 is the schematic diagram of the pre-buried U-shaped reinforcing bar in all sides of precast floor slab；

Figure 13 is the schematic diagram that floor modules are used for additional layer structure when garage；

Figure 14 is the structural schematic diagram that additional layer structure is attached at floor modules surface；

Figure 15 is the structural schematic diagram that additional layer structure is set to recessed groove；

Figure 16 is the schematic diagram of precast floor slab week side installation built-in fitting；

Figure 17 is the schematic diagram of precast floor slab surface installation built-in fitting；

Figure 18 is the structural schematic diagram that precast floor slab is arranged in the width direction；

Figure 19 is the structural schematic diagram of precast floor slab splicing；

Figure 20 is the schematic diagram of pre-buried elongated reinforcing bar and stirrup in the first post-cast strip when precast floor slab splices；

Figure 21 is the schematic diagram of pre-buried U-shaped stiffener in the first post-cast strip when precast floor slab splices；

When Figure 22 is precast floor slab splicing, the structural schematic diagram of sleeve Heterogeneous Permutation；

Figure 23 is the schematic diagram of precast floor slab connection auxiliary dowel；

Figure 24 is the schematic diagram that precast floor slab vertical and horizontal are all made of sleeve connection；

Figure 25 is after the completion of precast floor slab splices, in the schematic diagram of the fixed additional layer structure in its surface；

Figure 26 is the structural schematic diagram that precast floor slab is connected with I-steel；

Figure 27 is the schematic diagram that precast floor slab is connected with precast concrete beam；

When Figure 28 is that precast floor slab is connected with precast concrete beam, the signal of pre-buried U-shaped dowel in precast concrete beam Figure；

Figure 29 is the structural schematic diagram of precast floor slab and splicing prefabricated wallboard；

When Figure 30 is precast floor slab and splicing prefabricated wallboard, the width of the first post-cast strip is less than the structure of prefabricated panel thickness Schematic diagram；

Figure 31 is the schematic diagram for pouring mouth between the end of precast floor slab and upper layer prefabricated panel there are concrete；

Figure 32 is the schematic diagram of pre-embedded steel slab at the stitching position of floor modules and prefabricated panel；

Figure 33 is the schematic diagram of built-in bolt sleeve in the top and bottom of floor modules and prefabricated panel；

Figure 34 is the schematic diagram of all side built-in bolt sleeves of floor modules and prefabricated panel；

Figure 35 is the structural schematic diagram of closed-entry reinforcing steel bar connecting sleeve tube middle cylinder body；

Figure 36 is the end view of necking；

Figure 37 is the cooperation schematic diagram of sleeve and connection reinforcing bar；

Figure 38 is the connection relationship diagram of closed-entry reinforcing steel bar connecting sleeve tube and prefabricated board；

Figure 39 is the structural schematic diagram of split type cylinder；

Figure 40 is the connection relationship diagram of split type cylinder and prefabricated board；

Figure 41 is the structural schematic diagram that sleeve is connected with two reinforcing bars of vertical state；

Figure 42 is the structural schematic diagram for protruding into fastening piece type sleeve outside；

Figure 43 is to protrude into fastening piece type sleeve and the assembling schematic diagram for connecting reinforcing bar outside；

Figure 44 is the attached drawing of traditional precast hollow slab in background technique；

Figure 45 is the attached drawing of prefabricated superimposed sheet in background technique；

Figure 46 is the effect picture of the utility model precast floor slab；

Figure 47 is the finishing effect figure of the utility model precast floor slab.

In figure, 1, floor modules；11, reinforcing bar is connected；110, enlarged footing；12, deformed bar；13, transverse steel；14, Bar frame；141, upper steel mesh；142, lower steel mesh；143, spacer bar net；1431, upper elongated reinforcing bar；1432, elongated under Reinforcing bar；1433, support unit；15, hollow hole；16, U-shaped reinforcing bar；17, additional layer structure；171, decorative layer；172, wearing layer； 173, insulating layer；174, fireprotection layer；175, puigging；176, recessed groove；18, built-in fitting；181, pre-embedded steel slab；182, pre-buried angle Iron；183, bolt collar；19, dowel is assisted；191, hook part；101, notch is poured；102, the first post-cast strip；1021, lead to Long reinforcing bar；1022, stirrup；1023, U-shaped stiffener；1024, reinforce stirrup；1025, U-shaped dowel；103, it pours after second Band；

2, sleeve；20, peg；21, peg hole；22, mounting hole；

3, girder steel；

4, precast concrete beam；

5, fixed angle bar；51, fixing bolt；

6, cylinder；61, necking；611, transition circular conical surface；62, injected hole；63, connecting plate；631, through-hole；64, barrier member Part；65, clamping block；651, blocked hole；66, elastic slice；

7, prefabricated board；71, prefabricated panel.

Specific embodiment

The utility model is described in further detail with reference to embodiments.

Embodiment one: a kind of precast floor slab, as shown in Figure 1, precast floor slab is carried out according to mold size according to the actual situation It pours to form floor modules 1.The pre-buried connection reinforcing bar 11 in the surrounding side of floor modules 1, connection reinforcing bar 11 stretch out floor modules 1 Enlarged footing 110 is fixed in end, and the outer diameter of enlarged footing 110 is greater than the outer diameter of connection reinforcing bar 11, subsequent by building slab to facilitate Block 1 is spliced to form floor.

It is arranged as shown in Fig. 2, connection reinforcing bar 11 elongated can pass through floor modules 1, can be single or double layer；Such as Fig. 3 Shown, connection reinforcing bar 11 can also be partially embedded in floor modules 1, and pre-buried part can be straight muscle or curved muscle, can also be by two Root connects into U-shaped.

(direction for convenience of description, is longitudinal direction by the direction definition for being provided with connection reinforcing bar 11, and perpendicular direction is cross To)

As shown in figure 4, multiple deformed bars are arranged across floor modules 1 in order to improve the load bearing stength of floor modules 1 12, deformed bar 12 in floor modules 1 close to lower surface position at and along longitudinal direction horizontal direction arrangement.

As shown in figure 5, deformed bar 12 can also arrange in floor modules 1 according to upper and lower mode, it is arranged prefabricated The close upper surface of floor and/or the position of lower surface.Lower part deformed bar 12 is more than top deformed bar 12, such as can To be the relationship of 2:1.

As shown in fig. 6, the end that deformed bar 12 stretches out floor modules 1 can also fix enlarged footing 110, enlarged footing 110 outer diameter is greater than the outer diameter of deformed bar 12.

As shown in fig. 7, transverse steel can be arranged in floor modules 1 to increase the lateral width of floor modules 1 13, transverse steel 13 is arranged preferably adjacent to the lower surface of floor modules 1, to enhance floor modules 1 in lateral anti-bending strength.

In addition, as shown in figure 8, when the building standard width of a room in an old-style house is larger, i.e., when 1 size of precast floor slab module is larger, in floor modules 1 It can be with embedded bar rack 14.Bar frame 14 includes that upper steel mesh 141 and upper steel mesh 141 are oppositely arranged in parallel down Steel mesh 142 is connected between upper steel mesh 141 and lower steel mesh 142 using several support steel meshes 143.Spacer bar net 143 Interval vertical is arranged between upper steel mesh 141 and lower steel mesh 142, and welds with upper steel mesh 141 and lower steel mesh 142 It is fixed, to improve the load bearing stength of precast floor slab.

The settable elongated hollow hole 15 between two adjacent spacer bar nets 143, to mitigate entire floor modules 1 Weight, hollow hole 15 be it is longitudinally disposed.

Upper steel mesh 141 is identical with the structure of lower steel mesh 142, for the structure of the above steel mesh 141, mainly by Cross reinforcement and longitudinal bar, which are mutually lapped, to be welded and fixed, binding and fixing at the crossover location of cross reinforcement and longitudinal bar.Supporting steel simultaneously The upper end of muscle net 143 and upper steel mesh 141 weld, and the lower end of spacer bar net 143 and lower steel mesh 142 weld.

As shown in figure 9, spacer bar net 143 is that multiple tracks is parallel to each other longitudinally disposed truss.Spacer bar net 143 is main Including the upper elongated reinforcing bar 1431 parallel with upper steel mesh 141, elongated reinforcing bar 1432 under parallel with lower steel mesh 142 is upper logical Long reinforcing bar 1431 elongated reinforcing bar 1432 under is parallel, upper elongated reinforcing bar 1431 and under between elongated reinforcing bar 1432 support by a steel Multiple support units 1433 that muscle is repeatedly bent to form.Support unit 1433 is in U-shape (with reference to Fig. 9) or triangle is (with reference to figure 10), the upper vertex of support unit 1433 and the cross reinforcement of upper elongated reinforcing bar 1431 and upper steel mesh 141 weld simultaneously, and support is single The lower vertex of member 1433 cross reinforcement of elongated reinforcing bar 1432 and lower steel mesh 142 under welds simultaneously.

It should be pointed out that the above bar frame 14 selects minor diameter reinforcing bar, such as it can be 4-6mm's Reinforcing bar；And the connection reinforcing bar 11 for being used to connect adjacent two pieces of floor modules 1 need to use major diameter, to play preferable tension Effect, such as diameter are the reinforcing bar of 16mm.

Further, as shown in Fig. 8 and Fig. 9, all or part of reinforcing bar of upper steel mesh 141 and/or lower steel mesh 142 is stretched All sides of floor modules 1 out；With reference to Fig. 9 and Figure 10, upper steel mesh 141 and/or lower steel mesh 142 stretch out floor modules 1 week The steel bar end of side is set as enlarged footing 110.The stretching reinforcing bar for adhering to different floor modules 1 separately bound, is welded or sleeve 2 After connection, the globality of floor can be further strengthened.

As shown in Figure 11 and Figure 12, all sides of floor modules 1 can be with the U-shaped reinforcing bar 16 of pre-buried vertical direction, U-shaped steel In one end embedment floor modules 1 of the opening of muscle 16.Adjacent two blocks of precast floor slabs are attached by U-shaped reinforcing bar 16 as a kind of Mode can connect reinforcing bar 11 with enlarged footing 110 and be combined with the method that sleeve 2 connects, so that the globality of floor is more preferable.

Existing assembled architecture technology, after the completion of main structure, it is also necessary to carry out Decorating Project.In order to decorate Engineering progress synchronous with main structure is repaired, integrally formed extra play can also be set in 1 upper and lower surfaces of floor modules Structure 17.

As shown in figure 13, when precast floor slab is used for garage, the upper surface of floor modules 1 is fixed with wearing layer 172, following table Insulating layer 173, fireprotection layer 174, puigging 175 or the composite layer of three is arranged in face.When precast floor slab is used for dwelling layer, Decorative layer 171 is arranged in upper surface, as the ceramic tile etc. on existing floor.

For example, polystyrene board of the selection of insulating layer 173 of precast floor slab with a thickness of 50mm, fireprotection layer 174 select 50mm Thick A grade fire prevention rock wool board, the fibrous plaster that puigging 175 selects with a thickness of 2cm.

As shown in Figure 14 and Figure 15, precast floor slab in order to facilitate the installation of, the upper and lower surfaces of floor modules 1 with it is prefabricated Wallboard 71 or crossbeam lap-joint are not provided with additional layer structure 17, i.e. the edge that does not extend to precast floor slab of additional upholstery layers 171.

As shown in figure 14, additional layer structure 17 is attached at the surface of floor modules 1；As shown in figure 15, the table of floor modules 1 Recessed groove 176 is arranged in face, and additional layer structure 17 is set in recessed groove 176, the flush on surface and floor modules 1.

In addition, can be with preheating embedding line, for routes such as later period electric wire, cables in the additional layer structure 17 of floor modules 1 Wear.

As shown in figure 16 and figure 17, overlap joint installation is carried out to precast floor slab for convenience, all sides of floor modules 1 are close At bottom surface or its bottom surface is provided with built-in fitting 18 close to all lateral positions, and built-in fitting 18 can be pre-embedded steel slab 181 or pre-buried angle bar 182 or bolt collar 183.

In addition, carry out overlap joint installation to precast floor slab for convenience, the surrounding side of precast floor slab with to connect reinforcing bar 11 flat The fixed auxiliary dowel 19 of row, the ends curved inwards that auxiliary dowel 19 stretches out precast floor slab form hook part 191.Prefabricated building The peripheral side of plate, which is recessed, pours notch 101, reinforces the connection of adjacent precast floor slab.Precast floor slab and wallboard or steel are vertical Pre-buried angle bar 182 and bolt collar 183 at the link position of column, to reinforce the connection of precast floor slab and wallboard or steel column. The effect picture of final floor modules 1 is as shown in figure 46, and finishing effect figure is as shown in figure 47.

Embodiment two:

A kind of connection structure of precast floor slab is laid with by the precast floor slab of embodiment one in the horizontal direction as shown in figure 18 It is formed.Adjacent two blocks of precast floor slabs are longitudinally being attached using with connection reinforcing bar 11, laterally can directly be spliced.

The first post-cast strip 102 is formed between two adjacent precast floor slabs, connection reinforcing bar 11 is connected using sleeve 2.Such as figure Shown in 19, the both ends of sleeve 2 open up the mounting hole 22 being adapted to 110 outer diameter of enlarged footing for connecting reinforcing bar 11, two precast floor slabs In connection reinforcing bar 11 be inserted into sleeve 2 respectively, realize connection (2 structure of sleeve and the specific connection type of two precast floor slabs Last paragraph is introduced).

Further, as shown in figure 20, in order to reinforce connecting, more elongated reinforcing bars are also set up in the first post-cast strip 102 1021, and the stirrup 1022 that more elongated reinforcing bars 1021 are surrounded.Four elongated reinforcing bars 1021 are vertically arranged with reinforcing bar 11 is connect, Its cross section line forms square, and in the periphery of four elongated reinforcing bars 1021, hoop sets stirrup 1022, elongated reinforcing bar 1021 and hoop It is welded and fixed at the link position of muscle 1022.

Further, as shown in figure 21, the also fixed U-shaped stiffener 1023 in the side of two neighboring precast floor slab, it is elongated Reinforcing bar 1021 is being horizontally through several U-shaped stiffeners 1023, along with the cooperation for reinforcing stirrup 1024, makes the first post-cast strip Horizontally formd inside 102 three it is cross one another socket grid, greatly strengthen the connection of two contiguous prefabricated floors Effect.

As shown in figure 22, the sleeve 2 in the first post-cast strip 102 can be staggered.In conjunction with Figure 23, with U-shaped stiffener 1023 schemes arranged side by side can also be that, in the fixed auxiliary dowel 19 in the side of two neighboring precast floor slab, auxiliary dowel 19 is stretched Hook part 191 is arranged in the end of precast floor slab out, and elongated reinforcing bar 1021 passes through several hook parts 191, and binds with hook part 191 Connection.

When using U-shaped 16 scheme of reinforcing bar, elongated reinforcing bar 1021 needs to be worn from one of the first post-cast strip 102, and Using the scheme of auxiliary dowel 19, when assisting dowel 19 to be only in bottom monolayer setting, elongated reinforcing bar 1021 can be just Position is put into hook part 191, is easily installed progress.

Embodiment three:

With embodiment two the difference is that, as shown in figure 24, when muti-piece floor unit is installed, in addition to longitudinally disposed the Other than one post-cast strip 102, the second post-cast strip 103 is set between two blocks of laterally adjacent precast floor slabs.The program does not have not only The generation of splicing seams, and the first post-cast strip 102 and the second post-cast strip 103 constitute latticed reinforcement beam body, so that entirely The globality of floor construction is more preferable.

After the reinforcing bar that the circumferential surface lateral from floor modules 1 stretches out is connected with each other, it is cast in the second post-cast strip 103, thus Further enhance the lateral connection of two blocks of precast floor slabs.

As shown in figure 24, the steel bar end crossed out may be set to be enlarged footing 110, and be connected with sleeve 2.

The reinforcing bar crossed out can be the cross reinforcement of bar frame 14, can also be with additional stiffener.It is poured after second It can be with reference to being carried out in the first post-cast strip 102 with the steel-bar arrangement in 103.

It as shown in figure 25, can also be on it after the concrete setting of the first post-cast strip 102 and the second post-cast strip 103 Additional layer structure 17 is arranged in lower surface.For example, can be poured on post-cast strip top when wearing layer 172 is arranged in precast floor slab top surface Build 172 material of wearing layer of same thickness.Then it polishes the wearing layer 172 newly poured, makes entire 172 surface of wearing layer Form whole, completion surface decoration layer construction.

After being processed into decorative integrated plate due to precast floor slab, the later period need to only carry out the supplement of decorative layer to post-cast strip part Construction, workload is small, can greatly shorten the construction period of monolithic architecture.

Before 103 casting concrete of the first post-cast strip 102 and the second post-cast strip, the installation of preheating embedding line can also be carried out, Later period water, electricity, cable is facilitated to wear.

Example IV:

On the basis of example 1, a kind of connection structure of precast floor slab is provided in the bottom of the first post-cast strip 102 Girder steel 3 or precast concrete beam 4.

As shown in figure 26, when bottom be girder steel 3 when, e.g. steel I-beam when, peg hole can be opened up on sleeve 2 21, peg 20 welds after passing through the peg hole 21 on sleeve 2 with girder steel 3.

As shown in figure 27, when bottom is precast concrete beam 4, two blocks of precast floor slabs are overlapped on precast concrete beam 4 Top.As shown in figure 28, pre-buried U-shaped dowel 1025 is arranged in the top surface of precast concrete beam 4, and U-shaped dowel 1025 protrudes into In first post-cast strip 102, to keep beam integral in conjunction with floor, connecting node is stronger.

Embodiment five:

The difference is that, as shown in figure 29, the bottom of the first post-cast strip 102 is provided with prefabricated panel with example IV 71, the width of the first post-cast strip 102 is less than the thickness of prefabricated panel 71, so that it is prefabricated to realize that two blocks of precast floor slabs can be overlapped on 71 top surface of wallboard.

As shown in figure 30, the width of the first post-cast strip 102 might be less that the thickness of prefabricated panel 71, it is such be provided with it is several A benefit: first is that increasing the width of the first post-cast strip 102, the installation of internal reinforcing bar, the especially installation of sleeve 2 are facilitated； Second is that as shown in figure 31, when upper layer prefabricated panel 71 needs first to install, and then pours the first 102 concrete of post-cast strip again, in advance Concrete can be reserved between the end and upper layer prefabricated panel 71 of floor processed pours mouth.

Since general prefabricated panel 71 is with a thickness of 150,200mm, pushed up when two blocks of precast floor slabs are overlapped on prefabricated panel 71 When portion, the width of the first post-cast strip 102 can be smaller, it has not been convenient to the installation of internal reinforcing bar and sleeve 2.If but overlap joint is only When 30-50mm, since the thickness range of prefabricated panel 71 is protective layer, under larger pressure, crush easily.So being Facilitate the installation of precast floor slab Yu prefabricated panel 71, as shown in figure 32, the bottom surface of floor modules 1 is provided with close to all lateral positions Pre-embedded steel slab 181, prefabricated panel 71 are provided with pre-embedded steel slab 181 close to the side of upper end.When installation, by two pieces of pre-embedded steel slabs 181 welding, can preferably be fixed temporarily precast floor slab.This fixed form, as long as the lap of splice has 20mm or more Force request can be met, eliminate and setting is supported to precast floor slab others, improve construction efficiency.

Further, pre-embedded steel slab 181 can change pre-buried angle bar 182 or built-in bolt sleeve 183 into.

As shown in figure 33, built-in bolt sleeve 183, prefabricated panel 71 is arranged close to all lateral positions in the bottom surface of floor modules 1 The side of close upper end be provided with built-in bolt sleeve 183；Then fixed angle bar 5 is mounted on precast floor slab and prefabricated panel The corner that 71 connections are formed；After fixing bolt 51 passes through fixed angle bar 5, after being screwed into built-in bolt sleeve 183, connection is added By force.

As shown in figure 34, built-in bolt sleeve 183 also may be mounted at upper surface and the precast floor slab week of prefabricated panel 71 Side.This set, fixed angle bar 5 have finally been cast in the post-cast strip of end, have not needed to dismantle, improve construction efficiency.

Embodiment six:

A kind of construction method of precast floor slab relates generally to be spliced to form floor and floor using muti-piece precast floor slab With the fixation of wall or beam body, mainly include the following steps:

S1, fixed cross beam, crossbeam can be girder steel 3 or concrete prefabricated beam above ground supports column, column in advance

S2, precast floor slab is lifted to cross rail top, the first post-cast strip is reserved between two longitudinally adjacent precast floor slabs 102 width；

S3, two pieces of laterally adjacent precast floor slab direct splicings；

S4, the reinforcing bar of adjacent two blocks of precast floor slabs is attached:

Sleeve 2 connects: connection reinforcing bar 11 of the two neighboring precast floor slab with enlarged footing 110 is inserted into sleeve 2, two expansions Major part 110 is located inside sleeve 2.Specifically, it may is that and the connection reinforcing bar 11 of one of precast floor slab be inserted into sleeve 2 In one mounting hole 22, it is located at the enlarged footing 110 of the connection reinforcing bar 11 inside sleeve 2.Later, another block of precast floor slab is hung It rises, the enlarged footing 110 of the precast floor slab is inserted into another mounting hole 22 of sleeve 2, and the enlarged footing 110 is made to be located at set In cylinder 2, the Primary Location of two neighboring precast floor slab is realized；

S5, bed die is supported in the lower end surface of the first post-cast strip 102 and the second post-cast strip 103；

Upper layer prefabricated panel 71 is installed above the first post-cast strip 102, and after temporary support fixation, by top wall panel under The reinforcing bar that layer wallboard stretches out is attached, and can be the connection of sleeve 2.

Casting concrete in S6, the first post-cast strip 102 and the second post-cast strip 103, concrete simultaneously also can be from the two of sleeve 2 A mounting hole 22 and grout hole enter in sleeve 2.

S7, after the concrete setting in the first post-cast strip 102 and the second post-cast strip 103, poured after first according to demand With 102 and second post-cast strip 103 upper surface pour wearing layer 172 and polish or do finish coat, in 102 He of the first post-cast strip Lower surface installation insulating layer 173, fireprotection layer 174 and the puigging 175 of second post-cast strip 103.

Embodiment seven: a kind of construction method of precast floor slab, the difference with embodiment six are step S1, S2 and S3 not Together, step S1, S2 and S3 are as follows:

S1, prefabricated panel 71 is installed on ground；

S2, precast floor slab is lifted to prefabricated panel 71, when 102 width of the first post-cast strip is less than wallboard thickness, Directly overlap；When width is greater than wallboard thickness, installation support frame in installation precast floor slab bottom is supported fixation.

S3, the gap that the second post-cast strip 103 is reserved between laterally adjacent two blocks of precast floor slabs.

Tube-in-tube structure and attaching method thereof is introduced:

Sleeve 2 can protrude into fastening piece type sleeve using closed-entry reinforcing steel bar connecting sleeve tube and outside.

Closed-entry reinforcing steel bar connecting sleeve tube:

As shown in figure 35, closed-entry reinforcing steel bar connecting sleeve tube includes cylinder 6 and the necking 61 for being integrally connected to 6 both ends of cylinder, Several equally distributed injected holes 62 are offered on cylinder 6, are flowed into inside cylinder 6 convenient for cement slurry；In conjunction with Figure 36, necking 61 For round mouth, 61 inner wall of necking is conical surface-shaped, and the biggish one end of circular conical surface is towards the inside of cylinder 6；In conjunction with Figure 37, closed-entry steel Muscle connection sleeve connection structure be made of connection reinforcing bar 11 and cylinder 6, connection 11 one end of reinforcing bar it is pre-buried be fixedly connected on it is prefabricated Inside plate 7, the other end is exposed at 7 outside of prefabricated board and is connected with enlarged footing 110 in one end end far from prefabricated board 7, expands The outer wall radial dimension of major part 110 is greater than the outer wall radial dimension of connection reinforcing bar 11 and is less than the inner wall radial dimension of necking 61, Enlarged footing 110 can protrude into inside cylinder 6 from necking 61.

As shown in figure 38, after cement slurry flows into the inside of cylinder 6 and solidifies and form concrete from injected hole 62, enlarged footing 110 can be fixed on inside cylinder 6, and the connection reinforcing bar 11 that can limit 6 both ends of cylinder is pulled out towards the direction movement being located remotely from each other Cylinder 6 out, to be prefabricated to rectangular block shape structure of the reinforcing bar 11 far from 6 one end of cylinder is connected in the prefabricated board 7(Figure 38 at both ends The schematic diagram of plate 7) it is attached, improve the bonding strength between two prefabricated boards 7.Enlarged footing 110 is close to connection reinforcing bar 11 One end is rotary table planar, and enlarged footing 110 is less than the other end close to one end of prefabricated board 7；For convenient for narration, the circular conical surface of necking 61 It is defined as transition circular conical surface 611, passes through 611 integrally connected of transition circular conical surface between 6 end of necking 61 and cylinder, in connection reinforcing bar After 11 by the active force for extracting 6 direction of cylinder, round table surface squeezes concrete, and concrete is by squeezing action power (F arrow in such as Figure 38 The signified direction of head is the schematic diagram of force direction) pass to transition circular conical surface 611, the anti-work that transition circular conical surface 611 generates Firmly there is component radially to enlarged footing 110, radially compress enlarged footing 110, therefore, transition circular conical surface 611 can make Cylinder 6 and internal concrete carry bigger load, improve the company between connection reinforcing bar 11 and enlarged footing 110 and cylinder 6 Connect intensity.

Compared with existing grout sleeve, which does not need individual grouting operation, but in casting concrete, coagulation Soil paste liquid enters the connection that cylinder 6 completes connection reinforcing bar 11, operates more convenient and does not need special grouting material, saves About cost.Further, since the program is depended on pressure transmitting, stung compared to grout sleeve by cohering between grouting material and reinforcing bar It closes, connects relatively reliable.

The shape of necking 61 can be circle, be also possible to the various shapes such as rectangular, strip and ellipse, enlarged footing 110 section is adapted with the shape of necking 61.In order to make the pressure of enlarged footing 110 effectively be transferred to cylinder 6 by concrete On, the size of necking 61 is 1 ~ 5mm bigger than the size of enlarged footing 110, preferably 2 ~ 3mm.

As shown in Figure 39 and Figure 40, cylinder 6 has separate structure, can be split as two halves along axial direction.Two halves cylinder 6 is mutual Close one end outer surface is fixedly connected to connecting plate 63, and through-hole 631,6 phase of two halves cylinder are offered on connecting plate 63 Mutually docking split after, the through-hole 631 on connecting plate 63 can be mutually aligned, can by will sell or the pin members such as bolt simultaneously insertion two In a through-hole 631 being mutually aligned, pin joint is carried out to two connecting plates 63, limits two halves cylinder 6 towards the direction phase being located remotely from each other Mutually separation.

When the distance between two prefabricated boards 7 are smaller, the connection reinforcing bar 11 being embedded in inside prefabricated board 7 is close to each other The distance between the end face of one end it is also smaller, cylinder 6 can be split as two halves, first will wherein half cylinder 6 be nested in On one of connection reinforcing bar 11, then the other half cylinder 6 is socketed on connection reinforcing bar 11, finally by two halves cylinder 6 along even It connects the axial direction of reinforcing bar 11 and is slided towards direction close to each other, be mutually aligned the through-hole 631 on connecting plate 63, pass through pin member Insertion through-hole 631 stitches and fastens two halves cylinder 6.

As shown in figure 41, when connection be two reinforcing bars of vertical state when, in order to by sleeve 2 before casting concrete energy Enough docking locations for being more easily temporarily fixed at two connection reinforcing bars 11, are unlikely to slide.So position in 6 inner wall of cylinder Set the barrier element 64 for being connected with and enlarged footing 110 being prevented to run through sleeve 2.Barrier element 64 can be positioned at the intermediate disk of cylinder 6 Plate.Further, in order to flow freely cement slurry in cylinder 6, barrier element 64 is arranged to hollow annular shape, circle Ring internal diameter is less than the diameter of enlarged footing 110.Alternatively, barrier element 64 is also possible to be arranged radially the rod piece along cylinder 6.

Protrude into fastening piece type sleeve outside:

As shown in Figure 42 and Figure 43, protruding into fastening piece type sleeve outside includes cylinder 6, clamping block 65, elastic slice 66, and the two of cylinder 6 End offers the blocked hole 651 for 65 grafting of clamping block, offers injected hole 62 on cylinder 6.66 one end of elastic slice and cylinder 6 Lateral surface is mutually fixedly connected, and the other end of elastic slice 66 is mutually fixedly connected with one end that clamping block 65 is located at 6 outside of cylinder.

Connection 11 one end of reinforcing bar is fixedly connected with enlarged footing 110, and the radial dimension of enlarged footing 110 is greater than connection reinforcing bar 11 Radial dimension, enlarged footing 110 can be inserted into inside cylinder 6 from the port of cylinder 6.In insertion process, enlarged footing 110 pushes clamping block 65 towards far from 6 central axis of cylinder direction move when band spring plate 66 occur flexible deformation, cross clamping block in enlarged footing 110 After 65, elastic slice 66 is gradually recovered deformation insertion cylinder 6 and resets, and limitation enlarged footing 110 extracts cylinder 6.

When post-cast strip casting concrete around cylinder 6, cement slurry can be flowed into from the two-port and injected hole 62 of cylinder 6 Inside cylinder 6, solid concrete is formed after cement slurry sets, is fixed on connection reinforcing bar 11 inside cylinder 6, to realize two The connection of root connection reinforcing bar 11.

In addition it should be pointed out that 4 sleeve correlations that sleeve can be submitted using the applicant on April 8th, 2018 Patent, application number is respectively 201810306670.4,201810307419.X, 201810307420.2 and 201810307967.2。

This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability Field technique personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but As long as all by the protection of Patent Law in the scope of the claims of the utility model.

Claims (40)

1. a kind of precast floor slab, it is characterised in that: solid on two opposite all sides of floor modules (1) including floor modules (1) Surely have connection reinforcing bar (11), the end that floor modules (1) is stretched out in connection reinforcing bar (11) is fixed enlarged footing (110), enlarged footing (110) Size be greater than connection reinforcing bar (11) outer diameter.

2. precast floor slab according to claim 1, it is characterised in that: connection reinforcing bar (11) part is pre-buried or elongated setting In floor modules (1).

3. precast floor slab according to claim 1, it is characterised in that: parallel with connection reinforcing bar (11) in floor modules (1) Fixed several deformed bars (12).

4. precast floor slab according to claim 3, it is characterised in that: several deformed bars (12) are arranged in precast floor slab The position of internal close upper surface and/or lower surface.

5. precast floor slab according to claim 3, it is characterised in that: enlarged footing is arranged in deformed bar (12) end (110).

6. precast floor slab according to claim 1, it is characterised in that: be provided in floor modules (1) and connect reinforcing bar (11) vertical transverse steel (13).

7. precast floor slab according to claim 1, it is characterised in that: be provided with bar frame (14) in floor modules (1).

8. precast floor slab according to claim 7, it is characterised in that: bar frame (14) include upper steel mesh (141), with The parallel lower steel mesh (142) of upper steel mesh (141), connects spacer bar between upper steel mesh (141) and lower steel mesh (142) Net (143), spacer bar net (143) are vertically fixed between steel mesh (141) and lower steel mesh (142).

9. precast floor slab according to claim 8, it is characterised in that: the spacer bar net (143) is that multiple tracks is mutually flat The extending direction of the truss of row setting, truss is identical as the connection extending direction of reinforcing bar (11).

10. precast floor slab according to claim 9, it is characterised in that: per pass truss is the reinforcing bar of continuous three-legged structure Mesh sheet, top and upper steel mesh (141) are affixed, and bottom and lower steel mesh (142) are affixed.

11. precast floor slab according to claim 10, it is characterised in that: the continuous three-legged structure of per pass truss is by centre one The reinforcing bar and upper and lower two elongated reinforcing bars (1431,1432) that root is repeatedly bent are welded.

12. precast floor slab according to claim 10, it is characterised in that: a reinforcing bar bending forms the upper top of three-legged structure Point is affixed with the cross reinforcement of upper steel mesh (141)；Lower vertex and the cross reinforcement of lower steel mesh (142) are affixed.

13. precast floor slab according to claim 8, it is characterised in that: upper steel mesh (141) and/or lower steel mesh (142) All or part of reinforcing bar stretch out floor modules (1) all sides.

14. precast floor slab according to claim 13, it is characterised in that: upper steel mesh (141) and/or lower steel mesh (142) enlarged footing (110) are arranged in the steel bar end for stretching out floor modules (1) all sides.

15. precast floor slab according to claim 1, it is characterised in that: the pre-buried U-shaped reinforcing bar in all sides of floor modules (1) (16), in one end embedment floor modules (1) of the opening of U-shaped reinforcing bar (16).

16. precast floor slab according to claim 1, it is characterised in that: inside floor modules (1) setting it is several with connect steel The hollow hole (15) of the parallel perforation of muscle (11).

17. precast floor slab according to claim 1, it is characterised in that: the upper and lower surfaces of floor modules (1) are arranged Integrally formed additional layer structure (17)；Upper surface is fixed with decorative layer (171) and/or wearing layer (172)；Floor modules (1) Lower surface be fixed with insulating layer (173) and/or fireprotection layer (174) and/or puigging (175).

18. precast floor slab according to claim 17, it is characterised in that: the upper and lower surfaces of floor modules (1) with Prefabricated panel (71) or crossbeam lap-joint are not provided with additional layer structure (17).

19. precast floor slab according to claim 17, it is characterised in that: in the additional layer structure (17) of floor modules (1) Preheating embedding line.

20. precast floor slab according to claim 1, it is characterised in that: all sides of floor modules (1) at bottom surface or Its bottom surface is provided with pre-embedded steel slab (181) and/or pre-buried angle bar (182) and/or bolt collar (183) close to all lateral positions.

21. a kind of connection structure of precast floor slab, it is characterised in that: including the described in any item prefabricated buildings claim 1-20 Plate reserves the first post-cast strip (102) between two adjacent precast floor slabs, opposite two connections in two neighboring precast floor slab Reinforcing bar (11) is connected using sleeve (2), and the mounting hole (22) being adapted to enlarged footing (110) outer end diameter is opened up on sleeve (2).

22. the connection structure of precast floor slab according to claim 21, it is characterised in that: sleeve (2) is in the first post-cast strip (102) dislocation arrangement in.

23. the connection structure of precast floor slab according to claim 21, it is characterised in that: in the first post-cast strip (102) also More elongated reinforcing bars (1021) are set and hoop is located at the stirrup (1022) of more elongated reinforcing bar (1021) peripheries.

24. the connection structure of precast floor slab according to claim 23, it is characterised in that: the side of two neighboring precast floor slab Also fixed auxiliary dowel (19) in face, hook part (191) are arranged in the end that auxiliary dowel (19) stretches out precast floor slab, described logical Long reinforcing bar (1021) passes through several hook parts (191).

25. the connection structure of precast floor slab according to claim 23, it is characterised in that: the side of two neighboring precast floor slab Face is also fixed U-shaped stiffener (1023), and the elongated reinforcing bar (1021) passes through several U-shaped stiffeners (1023).

26. the connection structure of precast floor slab according to claim 21, it is characterised in that: precast floor slab top surface setting decoration Layer (171) or wearing layer (172) pour decorative layer (171) or wearing layer (172) after setting at the top of the first post-cast strip (102).

27. the connection structure of precast floor slab according to claim 21, it is characterised in that: the first post-cast strip (102) are internal Preheating embedding line is set.

28. the connection structure of precast floor slab according to claim 21, it is characterised in that: two neighboring precast floor slab is hanging down Directly mutually splice in the direction of connection reinforcing bar (11).

29. the connection structure of precast floor slab according to claim 21, it is characterised in that: two neighboring precast floor slab is hanging down The second post-cast strip (103) directly are set in the direction of connection reinforcing bar (11).

30. the connection structure of precast floor slab according to claim 29, it is characterised in that: two neighboring precast floor slab is hanging down Directly there is the reinforcing bar of stretching in the direction of connection reinforcing bar (11), the reinforcing bar of stretching is cast in the second post-cast strip (103).

31. the connection structure of precast floor slab according to claim 30, it is characterised in that: the steel-bar arrangement of stretching has expansion Head (110), the reinforcing bar stretched out from two blocks of precast floor slabs are connected with sleeve (2).

32. the connection structure of precast floor slab according to claim 29, it is characterised in that: precast floor slab top surface setting decoration Layer (171) or wearing layer (172) pour decorative layer (171) or wearing layer (172) after setting at the top of the second post-cast strip (103).

33. the connection structure of precast floor slab according to claim 29, it is characterised in that: the second post-cast strip is set in (103) Set preheating embedding line.

34. the connection structure of precast floor slab according to claim 21, it is characterised in that: the bottom of the first post-cast strip (102) Portion is provided with girder steel (3) or precast concrete beam (4).

35. the connection structure of precast floor slab according to claim 34, it is characterised in that: sleeve offers peg on (2) Hole (21), peg (20) pass through the peg hole (21) on sleeve (2) and weld afterwards with girder steel (3).

36. the connection structure of precast floor slab according to claim 34, it is characterised in that: the top of precast concrete beam (4) Pre-buried U-shaped dowel (1025) is arranged in face, and U-shaped dowel (1025) protrudes into the first post-cast strip (102).

37. the connection structure of precast floor slab according to claim 21, it is characterised in that: the bottom of the first post-cast strip (102) Portion is provided with prefabricated panel (71).

38. the connection structure of the precast floor slab according to claim 37, it is characterised in that: the width of the first post-cast strip (102) Degree is more than or less than the thickness of prefabricated panel (71).

39. the connection structure of the precast floor slab according to claim 38, it is characterised in that: the upper and lower side of prefabricated panel (71) Face or its side of upper and lower side is provided with pre-embedded steel slab (181) or pre-buried angle bar (182)；The pre-embedded steel slab of precast floor slab (181) pre-embedded steel slab (181) of/pre-buried angle bar (182) and prefabricated panel (71)/pre-buried angle bar (182) welds.

40. the connection structure of the precast floor slab according to claim 38, it is characterised in that: the upper and lower side of prefabricated panel (71) Face or its side of upper and lower side is provided with built-in bolt sleeve (183)；It further include fixed angle bar (5), fixed angle bar (5) peace The corner formed is connect with prefabricated panel (71) mounted in precast floor slab；After fixing bolt (51) passes through fixed angle bar (5), it is screwed into Built-in bolt sleeve (183).