CN107989247B - Assembled superposed hollow floor system and construction method thereof - Google Patents

Abstract

The invention discloses an assembled superposed hollow floor system and a construction method thereof, wherein horizontal steel members welded with hidden beam reinforcing bars are adopted, prefabricated laths are welded between two adjacent and parallel horizontal steel members, a plurality of prefabricated laths are spliced into a prefabricated bottom plate of the superposed hollow floor system, a core mould is laid, the core mould, the prefabricated laths and the horizontal steel members are used as bottom mould to pour concrete, so as to form a cast-in-place concrete top plate and a hidden beam, the prefabricated laths and the horizontal steel members play roles of supporting dead weight and construction load in the construction process, the core mould does not need to be subjected to anti-floating treatment, in use, the prefabricated laths directly transmit force to vertical members through the cast-in-place concrete top plate and the hidden beam, and each horizontal steel member is built in the corresponding hidden beam to cooperate with the corresponding hidden beam. The invention has the advantages of high assembly rate, good anti-seismic performance, no need of formwork support in construction sites, no need of erecting full framing scaffold, high construction speed, flexible and convenient construction, and is suitable for the assembly construction of large-span floors.

Description

A kind of assembled superimposed hollow floor and its construction method

Technical field

The invention relates to an assembled stacked hollow floor and a construction method thereof.

Background technique

The hollow floor is a cast-in-place reinforced concrete floor structure, also called a cast-in-place beamless hollow floor. It is a hollow floor without exposed beams cast in-situ after installing core mold products. The hollow floor includes steel bars, concrete and core formwork. The core formwork is embedded in reinforced concrete and the core formwork is generally made of lightweight materials. Hollow floors are widely used because of their advantages of reducing the weight of the building, increasing the building clearance, saving building materials, and reducing the overall cost.

Existing prefabricated floors mostly use steel truss floor decking, profiled steel plate composite floor slabs or composite slabs. These types of floor slabs are generally thin in thickness and have limited spans.

The hollow floor technology can reduce the weight of the building, increase the building clearance, save building materials, and can achieve large spans. However, its application still has many shortcomings, such as the need to erect a full red scaffolding on site, the base plate is not densely poured, and the anti-floating treatment of the core mold is difficult. wait.

Contents of the invention

The technical problem to be solved by the present invention is to provide an assembled superposed hollow floor and a construction method thereof.

To solve the above technical problems, the technical solutions adopted by the present invention are as follows:

A prefabricated composite hollow floor includes a plurality of horizontal steel members, a prefabricated bottom plate, a core form and a cast-in-place concrete roof. Each horizontal steel member is connected between two vertical members, and each horizontal steel member is connected to two vertical members. The steel components are located on the same horizontal plane, the prefabricated bottom plate is connected to each of the horizontal steel components, and the core form is embedded between the prefabricated bottom plate and the cast-in-place concrete top plate, which is characterized by:

The prefabricated floor includes a plurality of prefabricated strips, each of which covers the area enclosed by each of the horizontal steel members. The installation method is: the prefabricated strips are provided with prefabricated reinforced concrete. The lower plate and rib beam steel frame, the longitudinal steel bars of the precast reinforced concrete lower plate are welded with an embedded steel plate at both ends, and the embedded steel plate is embedded in the precast concrete of the precast reinforced concrete lower plate and is removed from the The longitudinal end face of the precast reinforced concrete lower plate partially extends, and one end of the transverse steel bar of the precast reinforced concrete lower plate extends from the transverse end face of the precast reinforced concrete lower plate as a reserved steel bar head, and the other end of the transverse steel bar extends A grouting sleeve is installed on one end, and the grouting sleeve is embedded in the precast concrete and exposed from the lateral end surface of the precast reinforced concrete lower plate. The lower part of the rib beam steel frame is embedded in the precast concrete. , and the rib beam steel frame extends longitudinally along the prefabricated reinforced concrete lower plate; both ends of the prefabricated reinforced concrete lower plate of each of the prefabricated strips are resting on two adjacent and parallel horizontal steel plates. on the lower flange of the component, and the embedded steel plate of the prefabricated reinforced concrete lower plate is connected and fixed with the lower flange by welding or bolting; for the two adjacent prefabricated strips, one of them The reserved steel bar head is inserted into the grouting sleeve of the other and connected and fixed by pouring grouting material into the grouting sleeve, so that the precast reinforced concrete lower plates of the two adjacent prefabricated strips are seamlessly spliced; and , for the two prefabricated strips connected on both sides of the same part of the same horizontal steel member, the tops of their rib beam steel frames are overlapped;

Concealed beam reinforcement is welded to each of the horizontal steel members; the top surface of the precast reinforced concrete lower plate of each of the prefabricated strips is located between the two adjacent rib beam steel frames and Core form materials are laid between adjacent rib beam steel frames and horizontal steel members to form the core form; an upper plate steel mesh is tied to the top surface of the core form, and the upper plate steel bars The net is tied together with the top of the ribbed steel frame of each of the prefabricated strips and the top of the concealed beam reinforcement on each of the horizontal steel members; and the core mold and the top of each horizontal steel member are integrally poured There is cast-in-place concrete, so that: the cast-in-place concrete is combined with the upper plate steel mesh and the top of the rib beam steel frame of each of the prefabricated strips to form the cast-in-place concrete roof, and the cast-in-place concrete is combined with the said The rib beam steel skeleton is combined to form a rib beam, the cast-in-place concrete and the concealed beam reinforcement are combined to form a concealed beam, and each of the horizontal steel members is built into the corresponding concealed beam.

As a preferred embodiment of the present invention: the rib beam steel frame is a steel truss, the lower chord bars of the steel bar truss and the longitudinal steel bars of the prefabricated reinforced concrete lower plate are located on the same plane and arranged in parallel, and the upper chord bars of the steel bar truss are It is the top of the rib beam steel frame; the upper plate steel mesh is formed by binding the upper plate longitudinal steel bars and the upper plate transverse steel bars. The upper plate longitudinal steel bars and the upper chord bars of the steel bar truss are located on the same plane and arranged in parallel.

As a preferred embodiment of the present invention: the rib beam steel frame is a stirrup rib beam. The stirrup rib beam is composed of two beam reinforcements, two beam bottom bars and a plurality of beam stirrups. The two beams The gluten and the two beam bottom bars are arranged along the longitudinal extension of the precast reinforced concrete lower plate. The two beam bottom bars are located on the same plane as the longitudinal steel bars of the precast reinforced concrete lower plate. The two beam reinforcements are It is the top of the rib beam steel frame, and each of the beam stirrups is hooped on the two beam reinforcements and the two beam bottom bars, and each of the beam stirrups is uniform along the longitudinal direction of the prefabricated reinforced concrete lower plate. Arranged at intervals; the upper plate steel mesh is formed by binding the upper plate longitudinal steel bars and the upper plate transverse steel bars, and the upper plate longitudinal steel bars and the two beam reinforcements are located on the same plane.

As a preferred embodiment of the present invention: the horizontal steel component is any of solid web box steel beams, lattice box steel beams, solid web H-shaped steel beams, lattice H-shaped steel beams and steel trusses. A sort of.

As a preferred embodiment of the present invention: the concealed beam reinforcement includes a plurality of open hoops, each of the open hoops is located above the horizontal steel member, and the two ends of each of the open hoops are welded respectively. On the webs on both sides of the horizontal steel member, each of the open hoops is evenly spaced along the extension direction of the horizontal steel member, and studs are welded to the top surface of the horizontal steel member.

A construction method for assembled stacked hollow floors, characterized in that: the construction method includes:

Step 1: In the factory, make prefabricated slats and weld concealed beam reinforcement on horizontal steel members;

Among them, the prefabricated strips are provided with a prefabricated reinforced concrete lower plate and a rib beam steel frame. Both ends of the longitudinal steel bars of the prefabricated reinforced concrete lower plate are welded with a pre-embedded steel plate, and the pre-embedded steel plate is pre-embedded in the The precast reinforced concrete lower plate is in the precast concrete and extends from the longitudinal end face of the precast reinforced concrete lower plate. One end of the transverse steel bar of the precast reinforced concrete lower plate extends from the transverse end face of the precast reinforced concrete lower plate. As a reserved steel bar head, a grouting sleeve is installed at the other end of the transverse steel bar, and the grouting sleeve is embedded in the precast concrete and exposed from the transverse end face of the precast reinforced concrete lower plate, and the rib beam The lower part of the steel frame is embedded in the precast concrete, and the rib beam steel frame extends longitudinally along the precast reinforced concrete lower plate;

Step 2: At the construction site, hoist multiple horizontal steel members so that each horizontal steel member is connected between two vertical members and each horizontal steel member is located on the same horizontal plane;

Step 3: At the construction site, hoist a plurality of the prefabricated strips so that each of the prefabricated strips covers the area enclosed by each of the horizontal steel members to form a structure with each of the horizontal steel members. The connected prefabricated bottom plate, each of the prefabricated strips is installed in the following manner: both ends of the prefabricated reinforced concrete lower plate of each of the prefabricated strips are placed under the two adjacent and parallel horizontal steel members. on the flange, and the embedded steel plate of the prefabricated reinforced concrete lower plate is connected and fixed with the lower flange by welding or bolting; for the two adjacent prefabricated strips, one of the reserved steel bars The head is inserted into the grouting sleeve of the other and connected and fixed by pouring grouting material in the grouting sleeve, so that the precast reinforced concrete lower plates of the two adjacent prefabricated strips are seamlessly spliced; and, for the connection The two prefabricated strips on both sides of the same part of the same horizontal steel member are overlapped and connected at the top of their ribbed steel frames;

Step 4: On the top surface of the prefabricated reinforced concrete lower plate of each prefabricated strip, the position is between the two adjacent rib beam steel frames and between the adjacent rib beam steel frames and horizontal steel members. The core mold material is laid at all positions to form the core mold;

Step 5: Bind the upper plate steel mesh on the top surface of the core mold, and connect the upper plate steel mesh with the top of the rib beam steel frame of each of the prefabricated strips and the concealed parts on each of the horizontal steel members. The tops of the beam reinforcements are tied together;

Step 6: Cast-in-place concrete is integrally poured above the core form and each horizontal steel member, so that: the cast-in-place concrete is combined with the upper plate steel mesh and the rib beam steel frame of each of the prefabricated strips. The top is combined to form a cast-in-place concrete roof, and the core form is embedded between the prefabricated bottom plate and the cast-in-place concrete roof. The cast-in-place concrete is combined with the rib beam steel frame to form a rib beam. The cast-in-place concrete A concealed beam is formed in combination with the concealed beam reinforcement, and each of the horizontal steel members is built into the corresponding concealed beam.

As a preferred embodiment of the present invention: the rib beam steel frame is a steel truss, the lower chord bars of the steel bar truss and the longitudinal steel bars of the prefabricated reinforced concrete lower plate are located on the same plane and arranged in parallel, and the upper chord bars of the steel bar truss are It is the top of the rib beam steel frame; the upper plate steel mesh is formed by binding the upper plate longitudinal steel bars and the upper plate transverse steel bars. The upper plate longitudinal steel bars and the upper chord bars of the steel bar truss are located on the same plane and arranged in parallel.

As a preferred embodiment of the present invention: the rib beam steel frame is a stirrup rib beam. The stirrup rib beam is composed of two beam reinforcements, two beam bottom bars and a plurality of beam stirrups. The two beams The gluten and the two beam bottom bars are arranged along the longitudinal extension of the precast reinforced concrete lower plate. The two beam bottom bars are located on the same plane as the longitudinal steel bars of the precast reinforced concrete lower plate. The two beam reinforcements are It is the top of the rib beam steel frame, and each of the beam stirrups is hooped on the two beam reinforcements and the two beam bottom bars, and each of the beam stirrups is uniform along the longitudinal direction of the prefabricated reinforced concrete lower plate. Arranged at intervals; the upper plate steel mesh is formed by binding the upper plate longitudinal steel bars and the upper plate transverse steel bars, and the upper plate longitudinal steel bars and the two beam reinforcements are located on the same plane.

As a preferred embodiment of the present invention: the horizontal steel component is any of solid web box steel beams, lattice box steel beams, solid web H-shaped steel beams, lattice H-shaped steel beams and steel trusses. A sort of.

As a preferred embodiment of the present invention: the concealed beam reinforcement includes a plurality of open hoops, each of the open hoops is located above the horizontal steel member, and the two ends of each of the open hoops are welded respectively. On the webs on both sides of the horizontal steel member, each of the open hoops is evenly spaced along the extension direction of the horizontal steel member, and studs are welded to the top surface of the horizontal steel member.

Compared with the prior art, the present invention has the following beneficial effects:

First, referring to Figures 1 to 5, the main idea of the present invention is to use a horizontal steel member 1 welded with concealed beam reinforcement, and weld the prefabricated strips 5 between two adjacent and parallel horizontal steel members 1 , and splice multiple prefabricated strips 5 into a prefabricated base plate for superimposing the hollow floor, and then lay the core form 4, and use the core form 4, the prefabricated strips 5 and the horizontal steel member 1 as the base form to pour concrete to form a cast-in-place Concrete roof 2 and concealed beam 6, among which, during the construction process of the superimposed hollow floor, the prefabricated strips 5 and the horizontal steel members 1 can support the self-weight and construction load, and the core form 4 is laid on the prefabricated strips 5 The prefabricated reinforced concrete lower plate 51 does not need anti-floating treatment. In the use of superimposed hollow floors, the prefabricated strips 5 directly transmit force to the vertical members 3 through the cast-in-place concrete roof plate 2 and concealed beams 6. Each The horizontal steel members 1 are all built into the corresponding concealed beams 6 and their synergy can, firstly, reduce the reinforcement of the concealed beams at the same strength, and secondly, enhance the seismic performance of the stacked hollow floor; moreover, the prefabricated slats 5 The width of the prefabricated reinforced concrete lower plate 51 can be determined according to construction and transportation needs. The thickness of the stacked hollow floor (mainly the height of the ribbed steel frame 52 of the prefabricated slats 5) can be determined according to the span requirements. , so as to be flexibly adapted to different application scenarios; therefore, the prefabricated laminated hollow floor of the present invention has the advantages of high assembly rate, good seismic resistance, no need for formwork at the construction site, no need to erect scaffolding, fast construction speed, and flexible and convenient construction. , suitable for assembly construction of large-span floors.

Second, referring to Figures 1 to 5, the construction method used in the prefabricated composite hollow floor of the present invention uses the core form 4, the prefabricated strips 5 and the horizontal steel members 1 as the bottom form to pour concrete during the construction stage. , to form the cast-in-place concrete roof plate 2 and concealed beam 6, the prefabricated strips 5 and the horizontal steel members 1 can support the self-weight and construction load, and the core form 4 is laid on the prefabricated reinforced concrete lower plate 51 of the precast strips 5. There is no need to perform anti-floating treatment; moreover, the width of the precast slats 5, that is, the transverse width of the precast reinforced concrete lower plate 51, can be determined according to construction and transportation needs, and the thickness of the superimposed hollow floor (mainly the rib beams of the prefabricated slats 5 The height of the steel frame 52) can be determined according to its span requirement; therefore, the construction method of the present invention has the advantages of simple and convenient construction, high assembly rate, no need for formwork at the construction site, no anti-floating treatment, no need to erect red scaffolding, and fast construction speed. The advantage of flexible and convenient construction is that it is suitable for assembly construction of large-span floors.

Description of the drawings

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments:

Figure 1 is a plan view of the assembled composite hollow floor of the present invention;

Figure 2 is a cross-sectional view taken along line A-A of Figure 1 in Embodiment 1 of the present invention;

Figure 3 is a cross-sectional view of the prefabricated strips at B-B of Figure 2 in Embodiment 1 of the present invention;

Figure 4 is a cross-sectional view at A-A of Figure 1 in Embodiment 2 of the present invention;

Figure 5 is a cross-sectional view of the prefabricated strips taken along line C-C of Figure 4 in Embodiment 2 of the present invention.

Detailed ways

As shown in Figures 1 to 5, the present invention discloses an assembled stacked hollow floor, which includes a plurality of horizontal steel members 1, a prefabricated bottom plate, a core form 4 and a cast-in-place concrete roof 2. Each horizontal steel member The components 1 are all connected between two vertical components 3. Each horizontal steel component 1 is located on the same horizontal plane. The prefabricated bottom plate is connected to each horizontal steel component 1. The core form 4 is embedded between the prefabricated bottom plate and the cast-in-place concrete top plate 2. Among them, the vertical member 3 can be a beam or a wall.

The inventive concept of the present invention is:

The prefabricated bottom plate includes a plurality of prefabricated strips 5. Each prefabricated strip 5 covers the area enclosed by each horizontal steel member 1. The installation method is: the prefabricated strips 5 are provided with a prefabricated reinforced concrete lower plate 51 and ribs. The beam steel frame 52, the longitudinal steel bars 511 of the precast reinforced concrete lower plate 51 are welded with an embedded steel plate 512 at both ends, and the embedded steel plate 512 is embedded in the precast concrete 513 of the precast reinforced concrete lower plate 51 and is obtained from the precast steel bars. The longitudinal end face of the concrete lower plate 51 partially extends. One end of the transverse steel bar 514 of the prefabricated reinforced concrete lower plate 51 extends from the transverse end face of the prefabricated reinforced concrete lower plate 51 as a reserved steel bar head 5141. The other end of the transverse steel bar 514 is installed with The grouting sleeve 515 is embedded in the precast concrete 513 and exposed from the lateral end surface of the precast reinforced concrete lower plate 51. The lower part of the rib beam steel frame 52 is embedded in the precast concrete 513, and the rib beam steel The frame 52 extends longitudinally along the prefabricated reinforced concrete lower plate 51; both ends of the prefabricated reinforced concrete lower plate 51 of each prefabricated strip 5 rest on the lower flanges 11 of two adjacent and parallel horizontal steel members 1. And the embedded steel plate 512 of the precast reinforced concrete lower plate 51 is connected and fixed with the lower flange 11 by welding or bolting, and equal strong connection between the longitudinal steel bar 511, the embedded steel plate 512 and the lower flange 11 should be ensured, and the bolted connection The method should use high-strength bolts 7; for two adjacent prefabricated strips 5, the reserved steel head 5141 of one of them is inserted into the grouting sleeve 515 of the other and connected and fixed by pouring grouting material into the grouting sleeve 515. , so that the precast reinforced concrete lower plates 51 of two adjacent precast strips 5 are seamlessly spliced; and, for the two precast strips 5 connected on both sides of the same part of the same horizontal steel member 1, their ribs The top of the steel frame 52 is overlapped, and the overlapped connection can be welded, mechanically connected or tied.

Concealed beam reinforcement is welded to each horizontal steel member 1; the top surface of the prefabricated reinforced concrete lower plate 51 of each prefabricated strip 5 is located between the two adjacent rib beam steel frames 52 and at the corresponding position. The core form material is laid between the adjacent rib beam steel frame 52 and the horizontal steel member 1 to form the core form 4; an upper plate steel mesh is tied to the top surface of the core mold 4, and the upper plate steel mesh is connected to the upper plate steel mesh. The top of the ribbed steel frame 52 of each prefabricated slat 5 and the top of the concealed beam reinforcement on each horizontal steel member 1 are tied together; and, a cast-in-place cast-in-place caster is integrally poured above the core mold 4 and each horizontal steel member 1 concrete, so that: the cast-in-place concrete is combined with the upper plate steel mesh and the top of the rib-beam steel frame 52 of each prefabricated strip 5 to form the cast-in-place concrete roof 2, the cast-in-place concrete is combined with the rib-beam steel frame 52 to form a rib beam, cast-in-place Concrete and concealed beam reinforcement are combined to form concealed beams 6, and each horizontal steel member 1 is built into the corresponding concealed beam 6.

Based on the above inventive concept, the present invention adopts the following preferred structure:

In the present invention, the rib beam steel frame 52 preferably adopts the structure of the following two embodiments.

Embodiment 1: The rib beam steel frame 52 is a steel truss. The lower chord bars of the steel bar truss and the longitudinal steel bars 511 of the prefabricated reinforced concrete lower plate 51 are located on the same plane and arranged in parallel. The upper chord bars 521A of the steel bar truss are the rib beam steel frame. 52 top; the upper plate steel mesh is formed by binding the upper plate longitudinal steel bars and the upper plate transverse steel bars. The upper plate longitudinal steel bars and the upper chord bars 521A of the steel truss are located on the same plane and arranged in parallel.

Embodiment 2: The rib beam steel frame 52 is a stirrup rib beam. The stirrup rib beam is composed of two beam reinforcements 521B, two beam bottom bars 522B and a plurality of beam stirrups 523B. The two beam reinforcements 521B and two The beam bottom bars 522B are arranged along the longitudinal extension of the precast reinforced concrete lower plate 51. The two beam bottom bars 522B are located on the same plane as the longitudinal steel bars 511 of the precast reinforced concrete lower plate 51. The two beam reinforcements 521B are the rib beam steel skeleton 52. At the top, each beam stirrup 523B is hooped on two beam reinforcements 521B and two beam bottom bars 522B. Each beam stirrup 523B is evenly spaced along the longitudinal direction of the precast reinforced concrete lower plate 51; the upper plate steel mesh is formed by the upper plate. The longitudinal steel bars and the transverse steel bars of the upper plate are bound together. The longitudinal steel bars of the upper plate are located on the same plane as the two beam reinforcements 521B.

In addition, in order to enhance the bending stiffness and bearing capacity of the prefabricated slats 5, whether the prefabricated slats 5 adopt the above-mentioned steel trusses or stirrup rib beams, concrete can be poured into the middle part of the rib beam steel frame 52 during prefabrication. Precast concrete integrally poured with the precast concrete 513 of the precast reinforced concrete lower plate 51 is formed in the inner cavity of the rib beam steel frame 52 .

As a preferred embodiment of the present invention: the horizontal steel member 1 can be any one of solid web box steel beams, lattice box steel beams, solid web H-shaped steel beams, lattice H-shaped steel beams and steel trusses. Among them, the use of box-shaped steel beams can help reduce the dead weight of the horizontal steel member 1; for box-shaped steel beams and H-shaped steel beams, their lower flanges are the lower flanges 11 of the above-mentioned horizontal steel member 1, For the steel truss, its lower chord is the lower flange 11 of the above-mentioned horizontal steel member 1.

As a preferred embodiment of the present invention: the concealed beam reinforcement includes a plurality of open hoops 61, each open hoop 61 is located above the horizontal steel member 1, and the two ends of each open hoop 61 are welded to the horizontal steel member 1 respectively. On the webs 12 on both sides, the opening hoops 61 are evenly spaced along the extension direction of the horizontal steel member 1, and the top surface of the horizontal steel member 1 is welded with studs 62 to enhance the connection between the horizontal steel member 1 and the concealed beam 6. The synergy of cast-in-place concrete.

In order to facilitate standard large-scale production, the above-mentioned core mold material is a core mold module with a specific shape. For example, when the rib beam steel frame 52 is a stirrup rib beam, the core mold module adopts the shape of a cuboid, while for the rib beam steel frame 52 In the case of steel trusses, two shapes of core mold modules can be used, one is a cuboid and the other is a pentahedron to adapt to the inclined sides of the steel truss. Moreover, the core mold module can be a hollow box or a lightweight material. In addition, when laying the core form material, the core form material should be in close contact with the top surface of the prefabricated reinforced concrete lower plate 51 to ensure that there is no leakage of slurry when pouring the cast-in-place concrete.

The invention also discloses the construction method of the above-mentioned assembled composite hollow floor, including:

Step 1: In the factory, make prefabricated strips 5, and weld concealed beam reinforcement on the horizontal steel member 1;

Among them, the prefabricated strip 5 is provided with a prefabricated reinforced concrete lower plate 51 and a rib beam steel frame 52. Both ends of the longitudinal steel bars 511 of the prefabricated reinforced concrete lower plate 51 are welded with an embedded steel plate 512, and the embedded steel plate 512 is pre-embedded. In the precast concrete 513 of the precast reinforced concrete lower plate 51 and extending from the longitudinal end face of the precast reinforced concrete lower plate 51, one end of the transverse steel bar 514 of the precast reinforced concrete lower plate 51 extends from the transverse end face of the precast reinforced concrete lower plate 51. As a reserved steel bar head 5141, a grouting sleeve 515 is installed at the other end of the transverse steel bar 514, and the grouting sleeve 515 is embedded in the precast concrete 513 and exposed from the lateral end face of the precast reinforced concrete lower plate 51, and the rib beam steel The lower part of the frame 52 is embedded in the precast concrete 513, and the rib beam steel frame 52 extends longitudinally along the precast reinforced concrete lower plate 51;

In addition, according to the transportation and hoisting capabilities, the precast concrete 513 of two or more prefabricated strips 5 can be poured and formed at one time in the factory to reduce the amount of splicing of the prefabricated strips 5 at the construction site.

Step 2: At the construction site, hoist multiple horizontal steel members 1 so that each horizontal steel member 1 is connected between two vertical members 3, and each horizontal steel member 1 is located on the same horizontal plane, where the vertical members 3 can It can be a beam or a wall, and the horizontal steel component 1 is arranged according to the frame design of the building;

Step 3: At the construction site, hoist multiple prefabricated slats 5 so that each prefabricated slat 5 covers the area enclosed by each horizontal steel member 1 to form a prefabricated floor connected to each horizontal steel member 1. , the installation method of each prefabricated slat 5 is: both ends of the prefabricated reinforced concrete lower plate 51 of each prefabricated slat 5 are placed on the lower flanges 11 of two adjacent and parallel horizontal steel members 1, and The embedded steel plate 512 of the precast reinforced concrete lower plate 51 is connected and fixed with the lower flange 11 by welding or bolting, and equal strong connections between the longitudinal steel bars 511, the embedded steel plate 512 and the lower flange 11 should be ensured. The bolted connection method High-strength bolts 7 should be used; for two adjacent prefabricated strips 5, the reserved steel head 5141 of one of them is inserted into the grouting sleeve 515 of the other and connected and fixed by pouring grouting material into the grouting sleeve 515. So that the prefabricated reinforced concrete lower plates 51 of two adjacent prefabricated strips 5 are seamlessly spliced; and, for the two prefabricated strips 5 connected on both sides of the same part of the same horizontal steel member 1, their rib beam steel The top of the frame 52 is overlapped, and the overlapped connection can be welded, mechanically connected or tied;

Step 4: On the top surface of the prefabricated reinforced concrete lower plate 51 of each prefabricated strip 5, between the two adjacent rib beam steel frames 52 and between the adjacent rib beam steel frame 52 and the horizontal steel member 1 The core mold material is laid at the positions in between to form the core mold 4;

Step 5: Bind the upper plate steel mesh on the top surface of the core mold 4, and match the upper plate steel mesh with the top of the ribbed steel frame 52 of each prefabricated strip 5 and the concealed beam on each horizontal steel member 1 The tops of the tendons are tied together;

Step 6: The cast-in-place concrete is integrally poured above the core form 4 and each horizontal steel member 1, so that the cast-in-place concrete is combined with the upper plate steel mesh and the top of the ribbed steel frame 52 of each prefabricated strip 5 to form an in-situ concrete structure. The concrete roof 2 is poured, and the core form 4 is embedded between the prefabricated bottom plate and the cast-in-place concrete roof 2. The cast-in-place concrete is combined with the rib beam steel frame 52 to form a rib beam, and the cast-in-place concrete is combined with the concealed beam reinforcement to form a concealed beam 6. , and each horizontal steel member 1 is built into the corresponding concealed beam 6.

The present invention is not limited to the above-mentioned specific embodiments. According to the above content, according to the common technical knowledge and common means in the field, without departing from the above-mentioned basic technical ideas of the present invention, the present invention can also make other equivalent forms. Modifications, replacements or changes all fall within the protection scope of the present invention.

Claims (10)

1. The utility model provides an assembled coincide hollow superstructure, includes many horizontal steel component (1), prefabricated bottom plate, mandrel (4) and cast in situ concrete roof (2), every horizontal steel component (1) all connects between two vertical component (3), each horizontal steel component (1) are located same horizontal plane, prefabricated bottom plate with each horizontal steel component (1) are connected, mandrel (4) are buried between prefabricated bottom plate and the cast in situ concrete roof (2), its characterized in that:

the prefabricated bottom plate contain many prefabricated laths (5), each prefabricated lath (5) are paved with by each horizontal steel member (1) encloses the region that forms, its mounting means does: the precast lath (5) is provided with a precast reinforced concrete lower plate (51) and a rib steel skeleton (52), two ends of a longitudinal steel bar (511) of the precast reinforced concrete lower plate (51) are welded with an embedded steel plate (512), the embedded steel plate (512) is embedded in precast concrete (513) of the precast reinforced concrete lower plate (51) and extends out of the longitudinal end face part of the precast reinforced concrete lower plate (51), one end of a transverse steel bar (514) of the precast reinforced concrete lower plate (51) extends out of the transverse end face of the precast reinforced concrete lower plate (51) as a reserved steel bar head (5141), a grouting sleeve (515) is arranged at the other end of the transverse steel bar (514), the grouting sleeve (515) is embedded in precast concrete (513) and is exposed out of the transverse end face of the precast reinforced concrete lower plate (51), and the lower part of the rib steel skeleton (52) is embedded in the precast concrete (513) and extends along the longitudinal direction of the precast reinforced concrete lower plate (51); two ends of a precast reinforced concrete lower plate (51) of each precast slat (5) are placed on lower flanges (11) of two adjacent and parallel horizontal steel members (1), and pre-buried steel plates (512) of the precast reinforced concrete lower plate (51) are fixedly connected with the lower flanges (11) in a welding or bolt connection mode; for two adjacent precast laths (5), the reserved steel bar head (5141) of one precast lath is inserted into the grouting sleeve (515) of the other precast lath and is fixedly connected by grouting materials in the grouting sleeve (515), so that the precast reinforced concrete lower plates (51) of the two adjacent precast laths (5) are spliced in a seamless manner; and, for two said prefabricated laths (5) connected to both sides of the same portion of the same said horizontal steel member (1), their rib steel skeleton (52) top lap joint;

each horizontal steel member (1) is welded with a dark Liang Peijin; core mould materials are paved on the top surface of a precast reinforced concrete lower plate (51) of each precast slat (5) at a position between two adjacent rib beam steel frameworks (52) and at a position between the adjacent rib beam steel frameworks (52) and the horizontal steel member (1) so as to form the core mould (4); an upper plate reinforcing steel mesh is bound on the top surface of the core mold (4), and the upper plate reinforcing steel mesh is bound with the top of a rib beam steel skeleton (52) of each prefabricated slat (5) and the top of a dark Liang Peijin on each horizontal steel member (1); and, cast-in-place concrete has been integrally cast to mandrel (4) and the top of each horizontal steel member (1) for: cast-in-place concrete with upper plate steel bar net and each rib beam steel skeleton (52) top of prefabricated slat (5) combine to form cast-in-place concrete roof (2), cast-in-place concrete with rib beam steel skeleton (52) combine to form the rib beam, cast-in-place concrete with dark Liang Peijin combines to form dark roof beam (6), and each horizontal steel member (1) is built-in corresponding dark roof beam (6).

2. The fabricated, stacked, hollow floor system of claim 1, wherein: the rib beam steel skeleton (52) is a steel bar truss, the lower chord rib of the steel bar truss and the longitudinal steel bars (511) of the precast reinforced concrete lower plate (51) are positioned on the same plane and are arranged in parallel, and the upper chord rib (521A) of the steel bar truss is the top of the rib beam steel skeleton (52); the upper plate reinforcing mesh is formed by binding upper plate longitudinal reinforcing bars and upper plate transverse reinforcing bars, and the upper plate longitudinal reinforcing bars and upper chord bars (521A) of the steel bar truss are positioned on the same plane and are arranged in parallel.

3. The fabricated, stacked, hollow floor system of claim 1, wherein: the rib beam steel skeleton (52) is a stirrup rib beam, the stirrup rib beam consists of two Liang Mianjin (521B), two beam bottom ribs (522B) and a plurality of beam stirrups (523B), the two Liang Mianjin (521B) and the two beam bottom ribs (522B) are all arranged along the longitudinal extension of the precast reinforced concrete lower plate (51), the two beam bottom ribs (522B) and the longitudinal steel bars (511) of the precast reinforced concrete lower plate (51) are positioned on the same plane, the two Liang Mianjin (521B) are the tops of the rib beam steel skeleton (52), each beam stirrup (523B) is hooped on the two Liang Mianjin (521B) and the two beam bottom ribs (522B), and each beam stirrup (523B) is uniformly arranged at intervals along the longitudinal direction of the precast reinforced concrete lower plate (51); the upper plate reinforcing mesh is formed by binding upper plate longitudinal reinforcing bars and upper plate transverse reinforcing bars, and the upper plate longitudinal reinforcing bars and the two Liang Mianjin (521B) are positioned on the same plane.

4. A fabricated, stacked, hollow floor system as claimed in any one of claims 1 to 3, wherein: the horizontal steel member (1) is any one of a solid-web box girder, a lattice box girder, a solid-web H-girder, a lattice H-girder and a steel truss.

5. A fabricated, stacked, hollow floor system as claimed in any one of claims 1 to 3, wherein: the hidden Liang Peijin comprises a plurality of opening hoops (61), each opening hoop (61) is located above the horizontal steel member (1), two ends of each opening hoop (61) are respectively welded on webs (12) on two sides of the horizontal steel member (1), the opening hoops (61) are uniformly arranged at intervals along the extending direction of the horizontal steel member (1), and studs (62) are welded on the top surface of the horizontal steel member (1).

6. A construction method of an assembled superposed hollow floor system is characterized by comprising the following steps: the construction method comprises the following steps:

step one, manufacturing a prefabricated slat (5) in a factory, and welding a dark Liang Peijin on a horizontal steel member (1);

the precast lath (5) is provided with a precast reinforced concrete lower plate (51) and a rib steel skeleton (52), wherein two ends of a longitudinal steel bar (511) of the precast reinforced concrete lower plate (51) are welded with an embedded steel plate (512), the embedded steel plate (512) is embedded in precast concrete (513) of the precast reinforced concrete lower plate (51) and extends out of a longitudinal end face part of the precast reinforced concrete lower plate (51), one end of a transverse steel bar (514) of the precast reinforced concrete lower plate (51) extends out of the transverse end face of the precast reinforced concrete lower plate (51) as a reserved steel bar head (5141), a grouting sleeve (515) is arranged at the other end of the transverse steel bar (514), the grouting sleeve (515) is embedded in the precast concrete (513) and is exposed out of the transverse end face of the precast reinforced concrete lower plate (51), and the lower part of the rib steel skeleton (52) is embedded in the precast concrete (513) and the rib steel skeleton (52) extends along the longitudinal direction of the precast reinforced concrete lower plate (51);

hoisting a plurality of horizontal steel members (1) on a construction site, wherein each horizontal steel member (1) is connected between two vertical members (3), and each horizontal steel member (1) is positioned on the same horizontal plane;

hoisting a plurality of prefabricated laths (5) on a construction site, so that each prefabricated lath (5) is paved with an area formed by enclosing each horizontal steel member (1) to form a prefabricated bottom plate connected with each horizontal steel member (1), and the installation mode of each prefabricated lath (5) is as follows: two ends of a precast reinforced concrete lower plate (51) of each precast slat (5) are placed on lower flanges (11) of two adjacent and parallel horizontal steel members (1), and pre-buried steel plates (512) of the precast reinforced concrete lower plate (51) are fixedly connected with the lower flanges (11) in a welding or bolt connection mode; for two adjacent precast laths (5), the reserved steel bar head (5141) of one precast lath is inserted into the grouting sleeve (515) of the other precast lath and is fixedly connected by grouting materials in the grouting sleeve (515), so that the precast reinforced concrete lower plates (51) of the two adjacent precast laths (5) are spliced in a seamless manner; and, for two said prefabricated laths (5) connected to both sides of the same portion of the same said horizontal steel member (1), their rib steel skeleton (52) top lap joint;

fourthly, paving core mould materials on the top surface of a precast reinforced concrete lower plate (51) of each precast slat (5) at a position between two adjacent rib beam steel frameworks (52) and a position between the adjacent rib beam steel frameworks (52) and the horizontal steel member (1) to form a core mould (4);

binding an upper plate reinforcing mesh on the top surface of the core mold (4), and binding the upper plate reinforcing mesh with the tops of rib beam steel frameworks (52) of the prefabricated laths (5) and the tops of the dark Liang Peijin on the horizontal steel members (1);

step six, pouring cast-in-place concrete integrally above the mandrel (4) and each horizontal steel member (1) to enable: cast-in-place concrete with upper plate steel bar net and each rib beam steel skeleton (52) top of prefabricated slat (5) combine to form cast-in-place concrete roof (2), just mandrel (4) are buried between prefabricated bottom plate and cast-in-place concrete roof (2), cast-in-place concrete with rib beam steel skeleton (52) combine to form the rib beam, cast-in-place concrete with dark Liang Peijin combines to form dark roof beam (6), and each horizontal steel member (1) embeds in corresponding dark roof beam (6).

7. The method for constructing the assembled laminated hollow floor system according to claim 6, wherein the method comprises the following steps: the rib beam steel skeleton (52) is a steel bar truss, the lower chord rib of the steel bar truss and the longitudinal steel bars (511) of the precast reinforced concrete lower plate (51) are positioned on the same plane and are arranged in parallel, and the upper chord rib (521A) of the steel bar truss is the top of the rib beam steel skeleton (52); the upper plate reinforcing mesh is formed by binding upper plate longitudinal reinforcing bars and upper plate transverse reinforcing bars, and the upper plate longitudinal reinforcing bars and upper chord bars (521A) of the steel bar truss are positioned on the same plane and are arranged in parallel.

8. The method for constructing the assembled laminated hollow floor system according to claim 6, wherein the method comprises the following steps: the rib beam steel skeleton (52) is a stirrup rib beam, the stirrup rib beam consists of two Liang Mianjin (521B), two beam bottom ribs (522B) and a plurality of beam stirrups (523B), the two Liang Mianjin (521B) and the two beam bottom ribs (522B) are all arranged along the longitudinal extension of the precast reinforced concrete lower plate (51), the two beam bottom ribs (522B) and the longitudinal steel bars (511) of the precast reinforced concrete lower plate (51) are positioned on the same plane, the two Liang Mianjin (521B) are the tops of the rib beam steel skeleton (52), each beam stirrup (523B) is hooped on the two Liang Mianjin (521B) and the two beam bottom ribs (522B), and each beam stirrup (523B) is uniformly arranged at intervals along the longitudinal direction of the precast reinforced concrete lower plate (51); the upper plate reinforcing mesh is formed by binding upper plate longitudinal reinforcing bars and upper plate transverse reinforcing bars, and the upper plate longitudinal reinforcing bars and the two Liang Mianjin (521B) are positioned on the same plane.

9. The construction method of the fabricated laminated hollow floor system according to any one of claims 6 to 8, wherein: the horizontal steel member (1) is any one of a solid-web box girder, a lattice box girder, a solid-web H-girder, a lattice H-girder and a steel truss.

10. The construction method of the fabricated laminated hollow floor system according to any one of claims 6 to 8, wherein: the hidden Liang Peijin comprises a plurality of opening hoops (61), each opening hoop (61) is located above the horizontal steel member (1), two ends of each opening hoop (61) are respectively welded on webs (12) on two sides of the horizontal steel member (1), the opening hoops (61) are uniformly arranged at intervals along the extending direction of the horizontal steel member (1), and studs (62) are welded on the top surface of the horizontal steel member (1).