CN209817217U - Bidirectional floor slab with superposed concrete reinforcing steel rings - Google Patents

Abstract

The utility model relates to a two-way floor slab with superimposed concrete reinforcement rings, which belongs to the technical field of construction. The two-way floor slab with superimposed concrete reinforcement ring is assembled by the two-way prefabricated floor slab with superimposed concrete reinforcement ring and cast-in-situ concrete. The longitudinal ends of the precast concrete bottom layer are respectively lapped on the top of the lower bar-shaped concrete member; the horizontal steel bars at the bottom of the opposite precast floor slabs are overlapped one by one; Connect the rebar rings. The effect and advantage of the utility model are that the two-way stress of the laminated board can be realized without special operation, the on-site integral assembly, the production process is simple, and it is beneficial to mechanized, automated and intelligent production. The transportation is convenient and the cost is low. It not only has good economic benefits, but also has superior mechanical properties. Moreover, the on-site construction is convenient, the construction period is short, and the economic effect is good, which avoids complicated operations in the construction process and greatly reduces the cost.

Description

A two-way floor slab with superimposed concrete reinforcement ring

technical field

The utility model belongs to the technical field of buildings, in particular to a two-way floor slab with superimposed concrete reinforcement rings.

Background technique

Composite slabs are a better structural form that combines prefabricated and cast-in-place concrete. The prefabricated prestressed thin slab (thickness 5-8 cm) is combined with the upper cast-in-place concrete layer to form a whole and work together. The prestressed main reinforcement of the thin slab is the main reinforcement of the laminated floor, and the upper concrete cast-in-place layer is only equipped with negative moment reinforcement and structural reinforcement. The prestressed slab is used as the bottom form for the cast-in-place concrete course, and it is not necessary to support the formwork for the cast-in-place course. The bottom surface of the thin board is smooth and flat, and the ceiling can no longer be plastered after the seams of the board are treated. This kind of laminated floor has the advantages of integrity of cast-in-place floor, high rigidity, good crack resistance, no increase in steel consumption, saving formwork, etc. Since the cast-in-place floor slab does not need formwork, there are also large precast concrete partition walls that can be hoisted at the same time during the structural construction stage, so that the decoration project can be inserted in advance and the construction period of the entire project can be shortened.

The floor span is within 8 meters, and can be widely used in various housing construction projects such as hotels, office buildings, schools, residences, hospitals, warehouses, parking lots, and multi-storey industrial plants. Prestressed thin slabs can be divided into three categories according to the structure of the superimposed surface: ① The shear stress on the superimposed surface is small, and no shear reinforcement is provided on the superimposed surface, but the upper surface of the concrete is required to be rough, scratched or left some joints. Hole. ②The superimposed surface bears a large shear stress. In addition to the rough scratching required on the surface of the thin plate, additional shear reinforcement is required. The diameter and spacing of the reinforcement are determined by calculation. The shape of the steel bar has a wave shape, a spiral shape, and a spot-welded mesh sheet bent into a triangular cross-section. ③Steel trusses are installed on the upper surface of the prefabricated thin slab to strengthen the rigidity of the thin slab during construction and reduce the support erected under the thin slab.

The concrete laminated floor is a part of the laminated structure, which is a structural form combining prefabrication and cast-in-place. During the construction process of the composite slab, the prefabricated bottom slab is first placed at the bottom, which acts as a formwork when pouring the upper concrete, and then the two parts of concrete form a whole to bear the load. Composite floor slab combines the advantages of cast-in-place and prefabrication, and is a very promising floor form.

1) From the point of view of force, compared with fully prefabricated floor slabs, the overall stiffness and seismic performance of the structure can be improved. The effective prestress established on the prefabricated section is larger, thereby improving the crack resistance of the structure. Under the premise of the same crack resistance, the amount of prestressed tendons can be saved.

2) From the point of view of the manufacturing process, the main stress-bearing parts of the laminated floor slab are manufactured in the factory, with a high degree of mechanization, easy to ensure quality, fast production speed by assembly line operation, and can be made in advance without taking up the construction period, and the formwork of the prefabricated part can be reuse. The post-cast concrete uses the prefabricated bottom slab as the formwork, which can reduce the workload of the formwork, reduce the wet work on the construction site, improve the conditions of the construction site, and improve the construction efficiency, especially in the conditions of high-altitude operations or difficult formwork support. It is even more obvious, and factory prefabrication is easy to realize the production of more complex cross-sectional forms, which has obvious advantages in developing the bearing potential of components and reducing the self-weight of structures. At the same time, the large-span laminated slab is also in line with the development direction of modern residential floors.

3) The results of long-term scientific experiments and engineering practice show that the use of laminated floor slabs in concrete structure engineering can achieve very obvious benefits. When high-strength steel bars are used, the amount of steel bars is greatly reduced. When the hollow prefabricated section is used, the amount of concrete can also be saved, and the construction period is correspondingly shortened. Its disadvantage lies in the increase of prefabricated processing and transportation and hoisting links.

4) The section of the concrete laminated slab is composed of prefabricated and cast-in-place parts. Their common working performance depends on the shear performance of the old and new laminated surfaces. Therefore, the shear resistance design of the laminated surface is a very important part. It can be seen that the concrete laminated floor There are also higher requirements for construction technology content, especially stricter requirements for the user unit in terms of construction quality management.

5) There have always been some problems in the two-way slabs of concrete composite slabs that have not been effectively resolved. It is difficult to realize mechanized, automated and intelligent production when dealing with various types of steel bars. Therefore, these technical problems need to be solved in order to fully reflect the advantages of prefabricated concrete assembly buildings. The processing of two-way boards is difficult and costly, and it is often difficult to realize and uneconomical.

Utility model content

In order to solve the above problems, the utility model provides a two-way laminated concrete reinforcement ring floor slab that can realize two-way stress without special operation, integral assembly on site, and simple production process, which effectively avoids the complicated construction process. operation, greatly reducing the cost.

The technical scheme that the utility model adopts is as follows:

A two-way floor slab with a laminated concrete reinforcement ring, including a prefabricated concrete bottom layer, a cast-in-place laminated layer, a transverse joint, a prefabricated floor slab bottom longitudinal reinforcement, a prefabricated floor slab bottom transverse reinforcement, a steel bar truss, a pre-embedded hoisting reinforcement, and a cast-in-place layer Longitudinal reinforcement on the top of the slab, transverse reinforcement on the top of the cast-in-place laminate, transverse connecting reinforcement ring, strip concrete members at the lower part,

The two-way floor slab with composite concrete reinforcement ring is assembled by the two-way prefabricated floor slab with composite concrete reinforcement ring and cast-in-place concrete;

The longitudinal two ends of the precast concrete bottom layer are respectively lapped on the top of the lower bar-shaped concrete member, and the overlapping length is 5-20mm; The steel bars overlap each other one by one;

The precast concrete bottom layers are close together one by one in the horizontal direction, and the horizontal connection openings of the adjacent precast concrete bottom layers are aligned one by one, and the horizontal connection reinforcement rings are respectively set in each horizontal connection opening; the horizontal connection reinforcement rings are horizontal, and the two ends respectively span the adjacent Two prefabricated laminate bottom longitudinal steel bars;

Before the pouring of the cast-in-place laminated layer, erect the longitudinal reinforcement on the top of the cast-in-place laminate, the longitudinal reinforcement on the top of the cast-in-place laminate is evenly distributed, and the vertical reinforcement on the top of the cast-in-place laminate overlaps each other;

Erection of the transverse reinforcement on the top of the cast-in-place floor slab, the horizontal reinforcement on the top of the cast-in-place floor slab is evenly distributed and the transverse reinforcement of the two-way prefabricated floor slab with a laminated concrete reinforcement ring overlaps with each other;

After the assembly is completed, pour the cast-in-place laminated layer.

Further, the prefabricated concrete bottom layer of the two-way prefabricated floor slab with composite concrete reinforcement rings is generally rectangular, and the lowest layer inside the precast concrete bottom layer is the prefabricated floor bottom horizontal reinforcement evenly distributed, and the length of the prefabricated floor bottom horizontal reinforcement is slab The width of the prefabricated laminate bottom transverse reinforcement extends to both ends of the slab;

On the top of the horizontal reinforcement at the bottom of the prefabricated floor, evenly distributed longitudinal reinforcement at the bottom of the prefabricated floor is arranged, and both ends of the longitudinal reinforcement at the bottom of the prefabricated floor protrude from both ends of the long sides of the precast concrete bottom;

On the sides of the two long sides of the precast concrete bottom layer, a number of horizontal connection openings are evenly arranged. The horizontal connection openings extend from the edge to the outside of the outermost steel truss, and there are 2 to 4 prefabricated laminate bottom longitudinally on the outside of the outermost steel truss. reinforcement; from the low bottom of the transverse joint to the top of the longitudinal reinforcement at the bottom of the precast laminate;

The upper part of the precast concrete bottom layer is the cast-in-place laminated layer, and the top layer in the cast-in-place laminated layer is the uniformly distributed transverse reinforcement on the top of the cast-in-place laminate, and the lower part of the horizontal reinforcement on the top of the cast-in-place laminate is the vertically crossed and evenly distributed cast-in-place reinforcement. Laminate top longitudinal reinforcement;

A reinforcement truss is set in the precast concrete ground floor. The bottom of the reinforcement truss is two longitudinal steel bars at the bottom of the prefabricated laminate, and the top is a longitudinal steel bar at the top of the cast-in-place laminate. The horizontal projection of the longitudinal reinforcement at the top of the cast-in-place laminate is located at the two precast floors In the middle of the longitudinal reinforcement at the bottom of the slab; the longitudinal reinforcement at the top of the cast-in-place laminate is connected with the longitudinal reinforcement at the bottom of the precast laminate on both sides by inclined reinforcement; the lower half of the steel truss is located in the precast concrete bottom layer, and the upper half is located in the cast-in-place composite layer Inside; 4 pre-embedded hoisting steel bars are buried in the precast concrete bottom layer.

Further, the lower strip-shaped concrete components are three types of different components, the first type is the building foundation; the second type is the top of the shear wall; the third type is the composite beam.

The beneficial effects of the utility model:

The beneficial effects and advantages of the utility model are that the laminated plates can be subjected to two-way force without special operations, integrally assembled on site, and the production process is simple, which is beneficial to mechanized, automated and intelligent production. The transportation is convenient and the cost is low. It not only has good economic benefits, but also has superior mechanical properties. Moreover, the on-site construction is convenient, the construction period is short, and the economic effect is good, which avoids complicated operations in the construction process and greatly reduces the cost.

Description of drawings

Figure 1 is a schematic top view of the two-way assembly of a two-way floor slab with superimposed concrete reinforcement rings.

Fig. 2 is a top view schematic diagram of the prefabricated layer of the two-way floor slab with superimposed concrete reinforcement ring.

Fig. 3 is a schematic side view of a two-way floor slab with superimposed concrete reinforcement rings.

In the figure, 1 is the precast concrete bottom layer; 2 is the cast-in-place composite layer; 3 is the horizontal connection; 4 is the longitudinal reinforcement at the bottom of the prefabricated laminate; 5 is the horizontal reinforcement at the bottom of the prefabricated laminate; 6 is the steel truss; 7 is the embedded Lifting reinforcement; 8 is the longitudinal reinforcement on the top of the cast-in-place laminate; 9 is the transverse reinforcement on the top of the cast-in-place laminate; 10 is the transverse connecting reinforcement ring; 11 is the lower strip concrete member.

Detailed ways

In order to further illustrate the utility model, the utility model will be described in detail below in conjunction with the accompanying drawings and embodiments, but they should not be understood as limiting the protection scope of the utility model.

Embodiment: As shown in Fig. 1-Fig. 3, a two-way floor slab with laminated concrete reinforced ring of the utility model comprises a precast concrete bottom layer 1, a cast-in-place laminated layer 2, a transverse connecting port 3, and longitudinal reinforcement bars 4 at the bottom of the prefabricated laminate , Prefabricated laminate bottom transverse reinforcement 5, steel truss 6, pre-embedded hoisting reinforcement 7, cast-in-place laminate top longitudinal reinforcement 8, cast-in-place laminate top transverse reinforcement 9, transverse connecting reinforcement ring 10, lower strip concrete member 11,

The two-way floor slab with composite concrete reinforcement ring is assembled by the two-way prefabricated floor slab with composite concrete reinforcement ring and cast-in-place concrete;

The longitudinal two ends of the precast concrete bottom layer 1 are respectively overlapped on the top of the lower strip concrete member 11, and the overlapping length is 5-20mm; The horizontal steel bars 5 at the bottom of the laminate are overlapped one by one;

The precast concrete bottom layers 1 are close together in the horizontal direction, and the horizontal connection openings 3 of the adjacent precast concrete bottom layers 1 are aligned one by one, and the horizontal connection reinforcement rings 10 are respectively arranged in each horizontal connection opening 3; the horizontal connection reinforcement rings 10 are horizontal, The two ends respectively straddle the bottom longitudinal reinforcement 4 of two adjacent prefabricated laminates;

Before the pouring of the cast-in-place laminated layer 2, the longitudinal steel bars 8 on the top of the cast-in-place laminates are erected, the longitudinal steel bars 8 on the top of the cast-in-place laminates are evenly distributed, and the vertical reinforcements 8 on the top of the cast-in-place laminates overlap each other;

Erection of the cast-in-place floor slab top transverse reinforcement 9, the cast-in-place floor slab top transverse reinforcement 9 is evenly distributed in the transverse direction and the two-way prefabricated concrete reinforcement ring of the adjacent laminated concrete reinforcement ring is overlapped with each other;

After the assembly is completed, the cast-in-place laminated layer 2 is poured.

The prefabricated concrete bottom layer 1 of the two-way prefabricated floor slab of the composite concrete reinforcement ring is generally rectangular, and the lowest layer inside the prefabricated concrete bottom layer 1 is a uniformly distributed prefabricated floor bottom transverse reinforcement 5, and the length of the prefabricated floor bottom horizontal reinforcement 5 is The width of the slab, the transverse reinforcement 5 at the bottom of the prefabricated laminate extends to both ends of the slab;

Above the horizontal reinforcing bars 5 at the bottom of the prefabricated laminates, evenly distributed longitudinal reinforcing bars 4 at the bottom of the prefabricated laminates are arranged, and both ends of the longitudinal reinforcing bars 4 at the bottom of the prefabricated laminates protrude from the two ends of the long sides of the precast concrete bottom layer 1;

On the sides of the two long sides of the precast concrete bottom layer 1, a number of horizontal connection openings 3 are evenly arranged, and the horizontal connection openings 3 extend from the edge to the outside of the outermost steel truss 6 respectively, and there are 2 to 4 outside of the outermost steel truss 6 The longitudinal reinforcement 4 at the bottom of the prefabricated laminate; the lower bottom of the transverse connection 3 to the top of the longitudinal reinforcement 4 at the bottom of the prefabricated laminate;

The upper part of the precast concrete bottom layer 1 is the cast-in-place laminated layer 2, and the top layer in the cast-in-place laminated layer 2 is the evenly distributed top transverse reinforcement 9 of the cast-in-place laminate, and the lower part of the horizontal reinforcement 9 on the top of the cast-in-place laminate is perpendicular to it and evenly distributed longitudinal reinforcement 8 on the top of the cast-in-place laminate;

A steel bar truss 6 is set in the precast concrete bottom layer 1. The bottom of the steel bar truss 6 is two prefabricated floor slab bottom longitudinal steel bars 4, and the top is a cast-in-place floor slab top longitudinal steel bar 8. The projection is located in the middle of the bottom longitudinal reinforcement 4 of the two prefabricated laminates; the longitudinal reinforcement 8 at the top of the cast-in-place laminate is connected to the longitudinal reinforcement 4 at the bottom of the prefabricated laminate on both sides by inclined steel bars; the lower half of the steel truss 6 is located at the bottom of the precast concrete 1, the upper half is located in the cast-in-place composite layer 2; 4 pre-embedded hoisting steel bars 7 are buried in the precast concrete bottom layer 1.

The lower strip-shaped concrete components 11 are three types of different components, the first type is the building foundation; the second type is the top of the shear wall; the third type is the composite beam.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made. Retouching should also be regarded as the scope of protection of the present utility model.

Claims (3)

1. The utility model provides a coincide concrete reinforcing bar ring two-way floor, includes precast concrete bottom (1), cast-in-place coincide layer (2), transverse connection mouth (3), longitudinal reinforcement (4) at the bottom of the precast floor, transverse reinforcement (5) at the bottom of the precast floor, steel bar truss (6), pre-buried hoist and mount reinforcing bar (7), cast-in-place floor top longitudinal reinforcement (8), cast-in-place floor top transverse reinforcement (9), transverse connection reinforcing bar ring (10), lower part bar concrete component (11), its characterized in that:

the composite concrete reinforced ring bidirectional floor slab is formed by splicing composite concrete reinforced ring bidirectional prefabricated floor slabs and casting concrete in situ;

the longitudinal ends of the precast concrete bottom layer (1) are respectively lapped on the top of the lower strip-shaped concrete member (11), the lapping length is 5 ~ 20mm, the longitudinally butted precast slab bottom transverse steel bars (5) are positioned on the upper part of the lower strip-shaped concrete member (11), and the opposite precast slab bottom transverse steel bars (5) are mutually lapped one by one;

the precast concrete bottom layers (1) are transversely and one by one closed and close, the transverse connectors (3) of the adjacent precast concrete bottom layers (1) are aligned one by one, and transverse connecting reinforcing steel bar rings (10) are respectively arranged in each transverse connector (3); the transverse connecting reinforcement ring (10) is horizontal, and two ends of the transverse connecting reinforcement ring respectively span two adjacent prefabricated floor bottom longitudinal reinforcements (4);

before the cast-in-place laminated layer (2) is cast, erecting cast-in-place laminate top longitudinal steel bars (8), uniformly distributing the cast-in-place laminate top longitudinal steel bars (8), and overlapping the longitudinally butted cast-in-place laminate top longitudinal steel bars (8);

erecting cast-in-place floor top transverse steel bars (9), wherein the cast-in-place floor top transverse steel bars (9) of the transversely adjacent laminated concrete steel bar ring bidirectional precast floor slabs are uniformly distributed and are mutually overlapped;

arranging a steel bar truss (6) in the precast concrete bottom layer (1), and burying 4 embedded hoisting steel bars (7) in the precast concrete bottom layer (1);

and pouring the cast-in-place laminated layer (2) after the assembly is finished.

2. A laminated concrete reinforced ring bidirectional floor slab as recited in claim 1, wherein: the prefabricated concrete bottom layer (1) of the bidirectional prefabricated floor slab with the superposed concrete reinforcement rings is integrally rectangular, the lowest layer in the prefabricated concrete bottom layer (1) is prefabricated floor slab bottom transverse reinforcements (5) which are uniformly distributed, the length of each prefabricated floor slab bottom transverse reinforcement (5) is the width of the slab, and the prefabricated floor slab bottom transverse reinforcements (5) extend to two ends of the slab;

the prefabricated floor bottom longitudinal reinforcements (4) are uniformly distributed above the prefabricated floor bottom transverse reinforcements (5), and two ends of each prefabricated floor bottom longitudinal reinforcement (4) extend out of two ends of a long edge of the prefabricated concrete bottom (1);

the side surfaces of two long edges of the precast concrete bottom layer (1) are uniformly provided with a plurality of transverse connectors (3), the transverse connectors (3) respectively extend to the outer sides of the outermost steel bar trusses (6) from the edges, and 2 ~ 4 prefabricated bottom longitudinal steel bars (4) are arranged on the outer sides of the outermost steel bar trusses (6);

the upper part of the precast concrete bottom layer (1) is provided with a cast-in-place superposed layer (2), the top layer in the cast-in-place superposed layer (2) is provided with cast-in-place slab top transverse steel bars (9) which are uniformly distributed, and the lower part of the cast-in-place slab top transverse steel bars (9) is provided with cast-in-place slab top longitudinal steel bars (8) which are vertically crossed and uniformly distributed with the cast-in-place slab top transverse steel bars;

the bottom of the steel bar truss (6) is provided with two prefabricated floor bottom longitudinal steel bars (4), the top is provided with a cast-in-place floor top longitudinal steel bar (8), and the horizontal projection of the cast-in-place floor top longitudinal steel bar (8) is positioned between the two prefabricated floor bottom longitudinal steel bars (4); connecting the top longitudinal steel bars (8) of the cast-in-place floor with the bottom longitudinal steel bars (4) of the prefabricated floor on two sides respectively by adopting oblique steel bars; the lower half of the steel bar truss (6) is positioned in the precast concrete bottom layer (1), and the upper half is positioned in the cast-in-place superposed layer (2).

3. A laminated concrete reinforced ring bidirectional floor slab as recited in claim 1, wherein: the lower strip-shaped concrete member (11) is three different members, and the first type is a building foundation; the second type is the top of the shear wall; the third type is a composite beam.