CN113833190A

CN113833190A - Full prefabricated floor slab, connection node structure thereof and assembled building structure

Info

Publication number: CN113833190A
Application number: CN202111227519.XA
Authority: CN
Inventors: 刘明辉; 朱连腾; 卢国安; 王东方; 杨涛; 张海江; 刘小荣; 祁勇; 刘冶
Original assignee: Tibet Taoyang Construction Engineering Co ltd
Current assignee: Tibet Taoyang Construction Engineering Co ltd
Priority date: 2021-10-21
Filing date: 2021-10-21
Publication date: 2021-12-24

Abstract

The invention relates to a full-prefabricated floor slab, a connection node structure thereof and an assembly type building structure, which comprise a panel, a bottom plate, a filling material and a steel bar truss, wherein the filling material is arranged between the panel and the bottom plate, and the steel bar truss is anchored with the panel and the bottom plate; the floor slabs are connected through the concrete hidden beams, the hidden beam stirrups extend into the U-shaped grooves of the two fully-prefabricated floor slabs, and part of the hidden beam longitudinal bars of the concrete hidden beams are anchored into the steel bar trusses of the fully-prefabricated floor slabs. The full precast floor slab has a sandwich structure, and is efficient and reasonable in stress; the panel and the bottom plate adopt UHPC, and the floor slab has ultrahigh durability and self-healing capability; the prefabricated building has the advantages of high industrialization degree, high prefabrication rate, less field wet operation, environmental protection and capability of reflecting the advantages of the fabricated building; the U-shaped grooves on the side surface and the end part of the floor slab are internally provided with the hidden beams, and the hoops and the longitudinal bars of the hidden beams are mutually anchored with the web members of the steel bar truss in the floor slab, so that the safety of the floor slab under extreme conditions is ensured; the floor slab construction does not need to be provided with floor slab supports, reduces the construction workload and obtains the economy.

Description

Full prefabricated floor slab, connection node structure thereof and assembled building structure

Technical Field

The invention relates to the technical field of house construction, in particular to a full-prefabricated floor slab, a connection node structure thereof and an assembly type building structure.

Background

The floor slabs commonly used at present have the following three types:

firstly, a reinforced concrete laminated slab: the laminated floor slab is an assembled integral floor slab formed by laminating prefabricated slabs and cast-in-place reinforced concrete layers. The composite floor slab has good integrity and high rigidity, can save templates, has smooth upper and lower surfaces, is convenient for finishing a finish coat, and is suitable for high-rise buildings and large-bay buildings with higher requirement on the integral rigidity.

However, the laminated slab is generally at least prefabricated 6cm + cast-in-place 7cm, the thickness reaches 130mm, the weight is large, materials are wasted, and the prefabricated part is heavy, so that the transportation, the hoisting and the like are difficult; temporary support is needed in the construction stage, the construction is complex, and the field wet operation is more; the rigidity and bearing capacity of the floor slab are low in the construction stage, and the span of the floor slab is generally within 4 m; ribs are formed on the periphery of the laminated slab, and requirements on a mold and transportation are high.

Secondly, the steel bar truss floor bearing plate: the steel bar truss and the bottom plate are connected into a whole through resistance spot welding, and the combined bearing plate is called a steel bar truss floor bearing plate. The mechanical production is realized, the uniform arrangement interval of the reinforcing steel bars and the consistent thickness of the concrete protective layer are facilitated, and the construction quality of the floor slab is improved. The assembled steel bar truss floor support plate can obviously reduce the field steel bar binding engineering quantity, quicken the construction progress, increase the construction safety guarantee and realize civilized construction. The assembled template and the connecting piece are convenient to disassemble and assemble, can be repeatedly used for many times, saves steel, and meets the national requirements of energy conservation and environmental protection.

However, the bottom die is made of thin steel plate, the bottom die is generally dismantled or a suspended ceiling is arranged after construction is finished, construction procedures are increased, rust points are easy to remain on the bottom of the plate, and the bottom die is suitable for steel structure buildings and difficult to connect with concrete; in the construction stage, if temporary supports are not arranged, the span of the floor bearing plate is small, and the general span is within 4 m; the bottom surface of the floor slab is a profiled steel sheet, which is not beautiful and is not suitable for concrete structures such as houses; and is not economical.

③ the prestressed concrete hollow slab: the hollow floor slab is a prefabricated floor slab, and one or more total longitudinal ducts are arranged in the hollow floor slab, so that the material is saved, and the weight is reduced. Usually made of prestressed concrete, the dimensions of which depend on the size of the bay and the capacity of the hoisting machinery. The product has the advantages of energy saving, sound insulation, earthquake resistance, flame retardance and the like, and is mainly used as a floor plate, a floor slab, a wallboard, a sound insulation plate and a cover plate.

Disclosure of Invention

The application provides a fully-prefabricated floor slab, a connection node structure thereof and an assembly type building structure, which mainly solve the problems of low stress efficiency and more wet operation on a construction site of the conventional floor slab; secondly, the problem of complex construction in the prior art is solved. In order to achieve the above problem, the present application is implemented by the following technical solutions:

the application provides a pair of complete precast floor slab, including panel, bottom plate, filler material and steel bar truss, be equipped with between panel and the bottom plate filler material, steel bar truss and panel, bottom plate anchor.

Optionally, the steel bar truss is a triangular steel bar truss, and three chord rods of the steel bar truss are respectively embedded in the panel and the bottom plate;

and transverse steel bars are arranged in the panel and the bottom plate or not, and are vertical to the chord member bars of the steel bar truss.

Optionally, the face plate and the bottom plate are both made of UHPC, with or without steel fibers.

Optionally, the filling material is foam concrete, and a pipeline is or is not arranged in the filling material.

Optionally, the side and/or end of the fully precast floor slab is of a U-shaped groove structure, and part of the steel bar truss is exposed in the U-shaped groove.

According to the connection node structure of the full precast floor slabs, the full precast floor slabs and the full precast floor slabs are connected through the concrete hidden beams, the concrete hidden beams comprise hidden beam stirrups and hidden beam longitudinal reinforcements, and the hidden beam stirrups extend into the U-shaped grooves of the two full precast floor slabs;

the part of the steel bar truss is exposed in the U-shaped groove, and the longitudinal bars of the partial hidden beams of the concrete hidden beam are anchored in the steel bar truss of the full precast floor slab.

Optionally, the studs of the steel beam are anchored with the concrete hidden beam.

Optionally, the fully-prefabricated floor slab and the fully-prefabricated floor slab are continuously arranged, a hole is formed in the floor slab, the stud of the steel beam is inserted into the hole, and concrete is poured into the slab hole for filling.

Optionally, the shear wall is fixedly connected with the full precast floor slabs on the two sides of the shear wall through the concrete hidden beam;

the concrete hidden beam comprises hidden beam stirrups and hidden beam longitudinal reinforcements, the hidden beam stirrups penetrate through the shear wall and extend into the U-shaped grooves of the full precast floor slabs on the two sides, and the part of the steel bar truss is exposed in the U-shaped grooves; and part of the hidden beam longitudinal bars of the concrete hidden beam are anchored into the steel bar truss of the full precast floor slab.

The application provides a full precast floor slab fabricated building structure, which comprises steel beams, shear walls, wall columns and a full precast floor slab;

the disconnected part of the full precast floor slab and the full precast floor slab is connected through a concrete hidden beam, and the concrete hidden beam at the disconnected part anchors the stud of the steel beam;

at the continuous connection part of the full precast floor slab and the full precast floor slab, a hole is formed in the local part of the floor slab, a stud of a steel beam is inserted into the plate hole, and concrete is poured into the plate hole for filling;

at the position of the change of the arrangement direction of the floor slab, connecting a full precast floor slab arranged along a first direction with a full precast floor slab arranged along a second direction through a concrete hidden beam, and anchoring a stud of a steel beam by the concrete hidden beam at the position of the change of the direction of the floor slab;

the full precast floor slab is connected with the full precast floor slab through a concrete hidden beam at the joint of the unidirectional floor slab in the non-main stress direction;

the shear wall is fixedly connected with the full precast floor slabs on the two sides of the shear wall through the concrete hidden beam;

the wall column penetrates through the floor slab, a hole is formed in the middle of the fully prefabricated floor slab, and the wall column penetrates through the hole in the middle of the floor slab; the middle part of the floor slab can be provided with a hole for the wall column to penetrate out, so that the structural integrity is good; the floor slabs can be continuous at the wall columns and the structural beams, so that the universality of the floor slabs is enhanced;

the concrete hidden beam comprises hidden beam stirrups and hidden beam longitudinal bars, the hidden beam stirrups extend into the U-shaped groove of the full precast floor slab, and the part of the steel bar truss is exposed in the U-shaped groove; and part of the hidden beam longitudinal bars of the concrete hidden beam are anchored into the steel bar truss of the full precast floor slab.

Compared with the prior art, the method has the following beneficial effects:

1, the fully-prefabricated floor slab has a sandwich structure, is efficient and reasonable in stress, almost has no influence on the weight due to the span of the floor slab, and has more obvious advantages when being applied to the span of more than 4 m;

2, the fully-prefabricated floor slab has the advantages of high industrialization degree, high prefabrication rate, less field wet operation, greenness and environmental protection, and can embody the advantages of an assembly type building; the floor is designed in a fully prefabricated way, the upper surface decoration of the floor can be processed in a factory, the lower surface is free from plastering, the assembly rate is further improved, and the construction speed is further accelerated;

3, the member weight of the whole precast floor slab is light, the whole precast floor slab is light and high in strength, the earthquake resistance is facilitated, the main structure and the foundation cost can be saved, and the economical efficiency is good; the floor slab has regular size, high transportation efficiency and convenient on-site hoisting construction, and saves the construction period and the construction cost;

4, the production process of the fully prefabricated floor slab is simple, special equipment is not needed, and all structures of the prefabricated part are formed at one time; no reinforcing steel bars extend out of the periphery, so that the requirement on the template can be reduced, and the industrial production and field installation are facilitated;

5, the panels and the bottom plate are made of ultra-high performance concrete (UHPC), and the floor slab has ultra-high durability and self-healing capability; moreover, the crack is not generated generally, and the small crack has self-repairing capability;

6, UHPC can be configured with steel fiber, and the transverse steel bars of the panel and the bottom plate are eliminated, so that the production process is simplified, and the weight of the floor slab can be further reduced; but also can further save steel;

7, the filling material made of the foam concrete has excellent heat preservation and sound insulation performance, and is beneficial to solving the problem of poor heat preservation and sound insulation performance of the existing partial floor slab;

8, hidden beams are arranged in U-shaped grooves on the side surface and the end part of the floor slab, and stirrups and longitudinal bars of the hidden beams are mutually anchored with web members of the steel bar truss in the floor slab, so that the safety of the floor slab under extreme conditions is ensured; the hidden beam can be also internally provided with a pipeline, so that the flexibility of laying the pipeline in site construction is ensured;

9, floor slab support is not needed in floor slab construction, so that the construction workload is reduced and the economy is obtained; the bearing capacity of the floor slab is the same in the construction stage and the use stage, special reinforcing measures (such as temporary support, local reinforcing steel bars and the like) in the construction stage are not needed, the economy is obvious, and the construction is convenient.

10, the load bearing capacity of the floor slab is the same as that of the floor slab in normal use, the related expenses such as construction measures and the like are avoided, and the economy is obvious; the thickness of the bottom floor is equal to that of the cast-in-place reinforced concrete floor, the whole floor is light in weight, and the material consumption of the supporting beam and the vertical member can be saved.

11, on the basis of keeping the advantage of flatness of the bottom surface of the reinforced concrete composite floor slab, the full-prefabricated floor slab has lighter weight, higher bearing capacity and rigidity and larger span compared with the common reinforced concrete composite floor slab; can be widely applied to low-rise, high-rise and super high-rise buildings of various residences, offices, hotels, businesses and the like.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention.

FIG. 1 is a schematic view of a full precast floor slab with bidirectional reinforcing bars according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;

FIG. 3 is a cross-sectional view taken at B-B of FIG. 1;

FIG. 4 is a full precast floor slab with unidirectional steel bars in the embodiment of the invention;

FIG. 5 is a cross-sectional view taken at C-C of FIG. 4;

FIG. 6 is a cross-sectional view taken at D-D of FIG. 4;

FIG. 7 is a schematic structural view of a full precast floor slab when the steel bar trusses are inverted;

FIG. 8 is a schematic structural view of a fully precast floor slab when the steel bar trusses are mixed forward and backward;

FIG. 9 is a schematic view of the structure of a full precast floor slab at the U-shaped groove;

FIG. 10 is a top view of a floor slab in a break;

FIG. 11 is a sectional view of a broken away floor slab;

FIG. 12 is a top view at a continuous floor node;

FIG. 13 is a sectional view at a node of a continuous floor slab;

FIG. 14 is a plan view of a change in the direction of floor placement;

fig. 15 is a sectional view of a place where the direction of arrangement of the floor slab is changed;

FIG. 16 is a top view of a unidirectional floor slab non-principal force direction junction;

FIG. 17 is a cross-sectional view of a non-primary stress direction junction of a unidirectional floor slab;

FIG. 18 is a top view of a floor slab and shear wall connection;

FIG. 19 is a cross-sectional view of the connection of the floor slab to the shear wall;

FIG. 20 is a top plan view of the wall studs as they pass through the floor slab;

figure 21 is a cross-sectional view of a wall stud through a floor.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments. It is to be understood that the described embodiments are only a few embodiments of the present invention, and not all embodiments. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In addition, the embodiments of the present invention and the features of the embodiments may be combined with each other without conflict. It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inside", "outside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or orientations or positional relationships that are conventionally arranged when the products of the present invention are used, or orientations or positional relationships that are conventionally understood by those skilled in the art, which are merely used for convenience of description and simplification of description, and do not indicate or imply that the devices or elements that are referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

As shown in fig. 1 to 8, the fully precast floor slab 1 of the present embodiment includes a face slab 11, a bottom slab 12, a filling material 14, and a steel bar truss 13. The face plate 11 is spaced from the base plate 12 with a filler material 14 therebetween. The steel bar truss 13 is anchored with the face plate 11 and the bottom plate 12.

The panels 11 and the floor 12 serve as members for the floor to withstand floor bending moments. Optionally, the panel 11 and the bottom plate 12 are made of ultra-high performance concrete UHPC, which has the characteristics of ultra-high strength, compressive strength of 120MPa-200MPa, and ultra-high durability. The UHPC has ultrahigh durability, compactness, strength and self-healing capability, and can reduce the requirements of the thickness of a protective layer and the anchoring thickness of the steel bar truss 13.

The steel bar truss 13 is used for bearing the shearing force of the floor slab and coordinating the deformation of the panel 11 and the bottom plate 12. The steel bar truss 13 comprises a chord member 131 and a web member 132, wherein the chord member 131 is respectively embedded in the panel 11 and the bottom plate 12, and the web member 132 connects the chord member 131 together to form a whole.

Particularly, the steel bar truss 13 is a triangular steel bar truss, so that the out-of-plane stability of the panel 11 and the bottom plate 12 when stressed is ensured. Specifically, the steel bar truss 13 has three chord members 131 and two corrugated web members, the three chord members 131 are arranged in a triangle, a part of the chord members 131 in the three chord members 131 is embedded in the panel 11, and the other part of the chord members 131 is embedded in the bottom plate 12. Two corrugated web members connect the three chord bars 131 together.

In particular, the steel bar trusses 13 are arranged in the full precast floor slab 1 in a direction perpendicular to the chord members 131.

Alternatively, transverse reinforcing bars 15 may be embedded in the panels 11 and the bottom plate 12, the transverse reinforcing bars 15 being perpendicular to the chord members 131.

It is worth mentioning that UHPC can be configured with steel fiber, and the transverse steel bars 15 of the face plate 11 and the bottom plate 12 are eliminated, so that the floor bending moment bearing capacity is ensured, and the production process is simplified.

In order to further reduce the thickness of the face plate 11 and the bottom plate 12, the steel bar truss 13 can adopt high-strength steel bars HRB500 and HRB600 to replace common steel bars.

It should be noted that the steel bar trusses 13 may be placed in an upright, inverted or mixed manner according to the stress, as shown in fig. 6 to 8.

The filler material 14 between the panels 11 and the floor 12 may be cast in place or prefabricated in the factory. It is noted that if the filling material 14 is in a prefabricated form, it may be filled in the form of a prefabricated block.

Particularly, the filling material 14 is foam concrete, and the filling material 14 can play roles in heat preservation, sound absorption and the like; the packing material 14 may be provided with lines inside to ensure that the lines are separated from the main structure. In addition, the compressive strength of the foam concrete is 1-4MPa, and the foam concrete can also be used as the out-of-plane constraint of the web members 132 of the steel bar truss 13 to restrain the buckling of the web members 132 and prevent the out-of-plane instability of the web members 132. The filling material 14 can also be used as a template when the panel 11 is poured, so that the core pulling process is avoided, and the production process is simplified.

Alternatively, as shown in fig. 9, the full precast floor slab 1 is formed with U-shaped grooves 16 at its side and/or end portions. Specifically, the edge of the filling material 14 is recessed inwards to form a U-shaped groove 16 together with the face plate 11 and the bottom plate 12, and the steel bar truss 13 is partially exposed in the U-shaped groove 16.

The fully-prefabricated floor slab adopts a sandwich structure, the panel and the bottom plate adopt UHPC, the floor slab is high in bearing capacity, high in safety redundancy, and more excellent in bearing and anti-seismic capacity, the floor slab is not prone to overall collapse, the anti-seismic safety of a building can be improved, and the life and property safety of people can be protected; the floor slab is integrally formed by processing in a factory, has the characteristics of light weight, high strength, good ductility, good durability, good crack resistance, self-repairing of cracks, convenience in construction and installation, material saving, high safety redundancy and the like, and realizes the structural stress performance and the anti-seismic performance of the fabricated floor slab with lower engineering cost.

Based on above-mentioned prefabricated floor 1 entirely, this application discloses 1 prefabricated building structure of prefabricated floor entirely, its floor node structure can divide into following six kinds of condition:

first, a node structure at a floor break. As shown in fig. 10 and 11, the disconnected part of the full precast floor slab 1 and the full precast floor slab 1 is connected by the concrete hidden beam 2, and the concrete hidden beam 2 is fixedly connected with the steel beam 3.

In particular, the concrete hidden beam 2 comprises hidden beam stirrups 21 and hidden beam longitudinal reinforcements 22; the hidden beam stirrups 21 extend into the U-shaped grooves 16 of the full precast floor slab 1, and part of the hidden beam longitudinal bars 22 of the concrete hidden beam 2 are anchored into the steel bar trusses 13 of the full precast floor slab 1.

The anchorage of the hidden beam stirrups 21, the hidden beam longitudinal reinforcements 22 and the web members 132 of the steel bar truss 13 and the anchorage of the steel beam studs 31 are realized by pouring concrete 23. The floor slab is coordinated to transmit floor shear force caused by earthquake, and the floor slab is ensured to be discontinuously collapsed under extreme conditions; the U-shaped groove 16 can also be used as a pouring template of the structure hidden beam concrete 23. To facilitate the insertion of the hidden beam stirrup 21, an open slot is provided in the faceplate 11 to mate with the hidden beam stirrup 21.

And a second, continuous floor slab node structure. As shown in fig. 12 and 13, the floor slab is continuously arranged, the floor slab can be connected with the steel beam 3 by adopting a local hole opening mode of the floor slab, the steel beam stud 31 is directly inserted into the slab hole 4, and then concrete is poured into the slab hole 4 for filling, so that the construction is simple.

And thirdly, arranging a node structure at the position with the changed direction of the floor slab. As shown in fig. 14 and 15, the fully precast floor slabs 1 arranged in the first direction and the fully precast floor slabs 1 arranged in the second direction are connected by the concrete hidden beams 2, and the concrete hidden beams 2 are fixedly connected with the steel beams 3.

The anchorage of the hidden beam stirrups 21, the hidden beam longitudinal reinforcements 22 and the web members 132 of the steel bar truss 13 and the anchorage of the steel beam studs 31 are realized by pouring concrete 23. The floor slab is coordinated to transmit floor shear force caused by earthquake, and the floor slab is ensured to be discontinuously collapsed under extreme conditions; the U-shaped groove 16 can also be used as a pouring template of the concrete of the structure hidden beam.

And the fourth node structure at the joint of the unidirectional floor slab in the non-main stress direction. As shown in fig. 16 and 17, the fully

precast floor slabs

1 and 1 are connected by concrete hidden beams 2.

The hidden beam stirrups 21 and the hidden beam longitudinal reinforcements 22 are anchored with the web members 132 of the steel bar truss 13 by pouring concrete 23. The floor slab is coordinated to transmit floor shear force caused by earthquake, and the floor slab is ensured to be discontinuously collapsed under extreme conditions; the U-shaped groove 16 can also be used as a pouring template of the concrete of the structure hidden beam.

And fifthly, a node structure at the joint of the floor slab and the shear wall. As shown in fig. 18 and 19, the shear wall 5 is fixedly connected with the full precast floor slabs 1 on both sides thereof through the concrete hidden beams 2.

In particular, the concrete hidden beam 2 comprises hidden beam stirrups 21 and hidden beam longitudinal reinforcements 22; the hidden beam stirrups 21 horizontally penetrate through the shear wall 5, two ends of each stirrup 21 respectively extend into the U-shaped grooves 16 of the full precast floor slabs 1 on two sides, and part of hidden beam longitudinal reinforcements 22 of the concrete hidden beam 2 are anchored into the steel bar trusses 13 of the full precast floor slabs 1.

The anchorage of the hidden beam stirrup 21 and the hidden beam longitudinal bar 22 with the web member 132 of the steel bar truss 13 is realized by pouring concrete or other pouring materials. The U-shaped channel 16 may be used as a template for the casting of the structural hidden beam casting material.

Optionally, shear connectors 6 are installed at two sides of the shear wall 5, and the end of the full precast floor slab 1 is lapped on the shear connectors 6. In particular, the shear connector 6 comprises an L-shaped plate and a connector, and the L-shaped plate is fixedly connected with the shear wall 5 through the connector. The full precast floor slab 1 is lapped on a horizontal plate of the L-shaped plate.

And sixthly, the wall column 7 penetrates through the node structure at the floor slab. As shown in fig. 20 and 21, a hole can be formed in the middle of the fully precast floor slab 1, so that the wall column 7 can penetrate out of the middle of the floor slab, and the integrity of the fully precast floor slab 1 and the wall column 7 is further enhanced.

Wall post 7 is connected with girder steel 3, and full precast floor 1 supports in girder steel 3 top.

Optionally, shear connectors 6 are arranged around the outer surface of the wall column 7, and the opening edge of the full precast floor slab 1 is lapped on the shear connectors 6. In particular, the shear connector 6 comprises an L-shaped plate and a connector, and the L-shaped plate is fixedly connected with the shear wall 5 through the connector. The full precast floor slab 1 is lapped on a horizontal plate of the L-shaped plate.

It is worth mentioning that the generality of the floor slab is enhanced in order to reduce the arrangement of the opposite-shaped floor slab. The fully-prefabricated floor slab 1 does not need to be disconnected at the wall columns 7 and the structural beams 3, the fully-prefabricated floor slab 1 can be directly erected on the structural beams 3 and the side faces of the wall columns in construction, floor slab supports do not need to be arranged, construction workload is reduced, and economy is achieved.

By using the fully-prefabricated floor slab 1, only concrete needs to be locally poured on site, so that the industrialization degree is high, the prefabrication rate is high, the on-site wet operation is less, and the advantages of an assembly type building can be reflected; the floor slab is designed in a fully prefabricated way, and the upper surface decoration of the floor slab can be processed in a factory, so that the assembly rate is further improved; the upper surface of the floor slab is fully prefabricated, so that the construction speed is further accelerated; no reinforcing steel bars extend out of the periphery of the floor slab, so that the requirement on the template is reduced, and the industrial production is facilitated.

The floor bearing capacity is the same in the construction stage and the use stage of the full precast floor, the span of the construction stage of the floor can be increased, special reinforcing measures (such as temporary support, local reinforcing steel bars and the like) in the construction stage are not needed, the economy is obvious, and the construction is convenient; the filling material is light, the floor slab span is increased, the weight of the floor slab is hardly influenced, the floor slab span can be increased, and the advantage of the floor slab with the span of more than 4m is more obvious.

Example two

The thickness of the fully precast floor slab 1 in the embodiment is 100mm-500 mm; the thickness of the steel bar protective layers of the panel 11 and the bottom plate 12 is 5-10mm, and the thickness of the steel bar protective layer of the common concrete is 15 mm; the thickness of the face plate 11 and the bottom plate 12 is 20mm to 30mm, and the thickness of the general concrete slab is 50mm at the minimum.

The fully-prefabricated floor slab 1 is in a large slab form, the length is 2m-13m, the width can be 0.5m-4m, the number of joints of the floor slab can be controlled, the risk of cracking and leakage of the floor slab is reduced, and the construction speed can be accelerated.

The hidden beam stirrups 21 extend 50-200mm into the U-shaped grooves 16 of the full precast floor slab 1.

The fully prefabricated floor slab 1 is produced in factories, has high surface flatness, and does not need secondary plastering and other procedures; the weight of the floor slab is 1/2-2/3 of the common concrete floor slab, thereby achieving light weight and high strength and greatly helping structural seismic resistance and economical efficiency.

The utility model provides a full precast floor slab, full play UHPC's comprehensive properties, material properties is excellent to traditional precast floor slab defect has been avoided: the production process is simple, and special equipment is not needed; besides good mechanical properties, the coating also has the advantages of corrosion resistance, good anti-permeability performance, energy conservation, low consumption, environmental protection and the like, and can be used for various fabricated buildings.

The above embodiments are provided to explain the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A full precast floor slab (1), characterized in that: the steel bar truss structure comprises a panel (11), a bottom plate (12), a filling material (14) and a steel bar truss (13), wherein the filling material (14) is arranged between the panel (11) and the bottom plate (12), and the steel bar truss (13) is anchored with the panel (11) and the bottom plate (12).

2. A fully precast floor slab (1) according to claim 1, characterized in that: the steel bar truss (13) is a triangular steel bar truss, and three chord rods (131) of the steel bar truss (13) are respectively embedded in the panel (11) and the bottom plate (12);

transverse steel bars (15) are arranged in the panel (11) and the bottom plate (12) or not, and the transverse steel bars (15) are vertical to chord members (131) of the steel bar truss (13).

3. A fully precast floor slab (1) according to claim 1 or 2, characterized in that: the face plate (11) and the bottom plate (12) are both made of UHPC, and the UHPC is configured with or without steel fibers.

4. A fully precast floor slab (1) according to claim 1 or 2, characterized in that: the filling material (14) is foam concrete, and pipelines are arranged or not arranged in the filling material (14).

5. A fully precast floor slab (1) according to claim 1 or 2, characterized in that: the side surface and/or the end part of the full precast floor slab (1) is of a U-shaped groove (16) structure, and part of the steel bar truss (13) is exposed in the U-shaped groove (16).

6. A connection node structure of a full precast floor slab (1) according to any one of claims 1 to 5, wherein: the fully-prefabricated floor slabs (1) are connected with the fully-prefabricated floor slabs (1) through concrete hidden beams (2), the concrete hidden beams (2) comprise hidden beam stirrups (21) and hidden beam longitudinal reinforcements (22), and the hidden beam stirrups (21) extend into U-shaped grooves (16) of the two fully-prefabricated floor slabs (1);

the part of the steel bar truss (13) is exposed in the U-shaped groove (16), and part of the hidden beam longitudinal bars (22) of the concrete hidden beam (2) are anchored in the steel bar truss (13) of the full precast floor slab (1).

7. The connection node structure of claim 6, wherein: the stud (31) of the steel beam (3) is anchored with the concrete hidden beam (2).

8. A connection node structure of a full precast floor slab (1) according to any one of claims 1 to 5, wherein: the fully-prefabricated floor slab (1) and the fully-prefabricated floor slab (1) are continuously arranged, a hole is formed in the floor slab, a stud (31) of the steel beam (3) is inserted into the hole, and concrete is poured into the slab hole (4) for filling.

9. A connection node structure of a full precast floor slab (1) according to any one of claims 1 to 5, wherein: the shear wall (5) is fixedly connected with the full precast floor slabs (1) on two sides of the shear wall through the concrete hidden beam (2);

the concrete hidden beam (2) comprises hidden beam stirrups (21) and hidden beam longitudinal reinforcements (22), the hidden beam stirrups (21) penetrate through the shear wall (5) and extend into the U-shaped grooves (16) of the full precast floor slabs (1) on the two sides, and part of the steel bar truss (13) is exposed in the U-shaped grooves (16); part of hidden beam longitudinal bars (22) of the concrete hidden beam (2) are anchored into the steel bar truss (13) of the full precast floor slab (1).

10. The utility model provides a full precast floor slab (1) assembled building structure which characterized in that: comprising steel beams (3), shear walls (5), wall columns (7) and a fully precast floor slab (1) according to any of claims 1-5;

the disconnected part of the full precast floor slab (1) and the full precast floor slab (1) is connected through a concrete hidden beam (2), and the concrete hidden beam (2) at the disconnected part anchors a stud (31) of a steel beam (3);

at the continuous connection part of the full precast floor slab (1) and the full precast floor slab (1), a hole is formed in the local part of the floor slab, a stud (31) of a steel beam (3) is inserted into a slab hole (4), and concrete is poured into the slab hole (4) for filling;

the method comprises the following steps that at a position where the direction of the floor slab changes, a full precast floor slab (1) arranged along a first direction is connected with a full precast floor slab (1) arranged along a second direction through a concrete hidden beam (2), and the concrete hidden beam (2) at the position where the direction of the floor slab changes anchors a stud (31) of a steel beam (3);

the full precast floor slab (1) is connected with the full precast floor slab (1) through a concrete hidden beam (2) at the joint of the unidirectional floor slab in the non-main stress direction;

the shear wall (5) is fixedly connected with the full precast floor slabs (1) on two sides of the shear wall through the concrete hidden beam (2);

the wall column (7) penetrates through the floor slab, a hole is formed in the middle of the full-prefabricated floor slab (1), and the wall column (7) penetrates through the hole in the middle of the floor slab;

the concrete hidden beam (2) comprises hidden beam stirrups (21) and hidden beam longitudinal reinforcements (22), the hidden beam stirrups (21) extend into the U-shaped groove (16) of the fully-prefabricated floor slab (1), and part of the steel bar truss (13) is exposed in the U-shaped groove (16); part of hidden beam longitudinal bars (22) of the concrete hidden beam (2) are anchored into the steel bar truss (13) of the full precast floor slab (1).