CN209703805U - A new type of composite floor suitable for H-shaped steel beams in steel structures - Google Patents

Abstract

The utility model relates to a kind of novel superposed superstructures suitable for steel construction H profile steel beam, are formed by H profile steel beam, prestressed slab, transverse and longitudinal concrete steel muscle, concrete folding；Prestressed slab is made of prestressed slab ontology, both ends along the longitudinal floor for the horizontal ribbed and two edge plate length directions setting that plate width direction is arranged；Both ends are horizontal ribbed in symmetrical outer incline setting, and oblique cutting enters the inner space between the upper lower flange of corresponding end H profile steel beam respectively and lower end surface and lower flange inner surface fit fixation；Mounting hole is prefabricated on the floor of two sides longitudinal direction, transverse steel is threaded onto mounting hole, longitudinal reinforcement is layed between the floor of both sides longitudinal direction, concreting groove is constituted between the floor of both sides longitudinal direction, concreting is simultaneously filled and led up in concreting groove, and mounting hole aperture is greater than the diameter of transverse steel, and concrete is filled in the fit clearance of mounting hole and row reinforcing bar.This superposed floor is convenient for construction, can effectively control prestressing camber.

Description

A new type of composite floor suitable for H-shaped steel beams in steel structures

technical field

The utility model relates to the field of assembled building structures, relates to building structure floor technology, in particular to a novel laminated floor suitable for H-shaped steel girders of steel structure.

Background technique

Prefabricated buildings are a major development trend in today's society. During the construction of the prefabricated building, the emission of construction sewage, harmful gas, dust and construction noise pollution are effectively reduced, and various adverse effects of construction on the surrounding environment are reduced, which is conducive to improving the labor productivity of the building, promoting design, and building quality. Refinement improves the overall quality of the building and the rate of energy saving and drainage reduction, which promotes the healthy and sustainable development of my country's construction industry and meets the needs of national economic development.

The laminated floor is a commonly used component type in prefabricated buildings. The laminated floor has good integrity, and the upper and lower surfaces of the board are flat, which is convenient for decoration of the facing layer. It is suitable for high-rise buildings and large bays that require high overall rigidity architecture. The prestressed slab part of the laminated floor is not only one of the components of the floor structure, but also the permanent formwork of the cast-in-place reinforced concrete laminated layer. The prestressed slab part has three functions as bottom formwork, floor reinforcement, and providing a flat bottom surface, so it has the advantages of saving steel formwork, reducing on-site reinforcement work, and no plastering on the ceiling. In addition, since the steel wire protection layer of the prestressed plate part is thicker, it can better meet the fire protection requirements.

At present, there are mainly two types of prestressed slabs commonly used in laminated floors: one is prefabricated laminated slabs for steel trusses. The lower stiffness can also increase the shear resistance of the prestressed slab and the post-cast laminated layer, but in the construction process, it is often inconvenient to arrange the equipment and pipelines or the thickness of the protective layer after the arrangement is insufficient. The other is PK prestressed ribbed plate, which has good integrity, crack resistance and earthquake resistance, simple construction, short construction period, energy saving and environmental protection, and easy industrialization. It overcomes many problems of existing floors, but The anti-arch value cannot be effectively controlled, resulting in insufficient flatness of the lower surface of the floor and prone to cracks, which will affect the next construction and use.

After searching the prior art, no technical solution similar to this patent was found.

Utility model content

The purpose of this utility model is to overcome the deficiencies of the prior art, and provide a new type of composite floor suitable for H-shaped steel beams of steel structure. Good flatness; and it is convenient for internal equipment pipeline layout, which can effectively increase the thickness of the protective layer of equipment pipelines.

The above-mentioned purpose of the utility model is achieved through the following technical solutions:

A new type of composite floor suitable for H-shaped steel beams of steel structure, characterized in that: the new type of composite floor is composed of H-shaped steel beams, prestressed plates supported between H-shaped steel beams, laid on pre-stressed The transverse reinforcement and longitudinal reinforcement on the stress slab are laminated with the concrete poured on the prestress slab;

The prestressed slab is composed of the prestressed slab body, the transverse ribs integrally cast on both ends of the lower part of the prestressed slab body along the direction of the slab width, and the longitudinal ribs integrally cast on both sides of the upper part of the prestressed slab body along the length direction of the slab; The end transverse ribs are symmetrically inclined outwardly, and the transverse ribs at both ends are obliquely inserted into the inner space between the upper and lower flanges of the corresponding end H-shaped steel beams, and the lower end surface of the transverse rib is in contact with the inner surface of the lower flange. Fitted and fixed; the longitudinal ribs on both sides are prefabricated with piercing holes that can be used as reinforcement piercing and pipeline layout, and the piercing holes are set opposite to each other; the transverse reinforcement is pierced in the piercing hole, and the longitudinal reinforcement It is laid between the longitudinal ribs on both sides, and the concrete pouring groove is formed between the longitudinal ribs on both sides. The concrete is poured and filled in the concrete pouring groove, and the hole diameter of the piercing hole is larger than the diameter of the transverse steel bar. Concrete is filled in the matching gaps of the horizontal steel bars.

Moreover, the longitudinal rib adopts a trapezoidal rib structure whose outer surface faces straight.

Advantage and positive effect of the present utility model are:

1. Compared with the existing laminated floor, this laminated floor has some piercing holes on the prestressed plate that can be directly laid pipelines in the process of laminated floor construction or reserved for subsequent piercing pipelines. There is also enough pipeline layout space between the longitudinal ribs on both sides of the stress plate, which solves the problem of inconvenient equipment pipeline layout, and provides sufficient protective layer thickness for pipelines through the concrete pouring layer and the prestressed plate body part .

2. The prestressed slab of the laminated floor is provided with longitudinal ribs and transverse ribs, so that the integrity is better, and there is no need to set temporary support for the floor during the construction process, which effectively improves the convenience of construction.

3. Compared with the existing prefabricated laminated floor, the longitudinal ribs and transverse ribs set on the prestressed slab effectively control the prestressed anti-arch value of the laminated floor, so that the laminated floor The cover achieves better flatness.

4. Compared with the existing laminated floor, this laminated floor has a piercing hole with a diameter larger than that of the transverse reinforcement reserved on the longitudinal rib on the prestressed plate, so that the concrete can still be effectively filled after the transverse reinforcement is installed. The gap between the two not only ensures the position of the steel bar, but also forms a pin bolt effect, which strengthens the integrity of the laminated floor.

5. Compared with the existing prefabricated floor, this laminated floor is equipped with longitudinal ribs and transverse ribs on the prestressed plate, so that the prestressed plate is largely avoided from being damaged during transportation. And strengthen the overall strength of the prestressed plate, so that it can give full play to its performance during use.

Description of drawings

Fig. 1 is the schematic diagram of H-shaped steel beam structure;

Fig. 2 is the schematic diagram of prestressed plate structure;

Fig. 3 is the structural representation of placing the prefabricated panel on the H-shaped steel beam;

Fig. 4 is the structural representation of laying transverse and longitudinal reinforcement on the prestressed slab;

Fig. 5 is a schematic diagram of pouring concrete after laying steel bars (only partial concrete is shown in the accompanying drawing).

Detailed ways

The utility model will be further described in detail below in conjunction with the accompanying drawings and through specific embodiments. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the utility model.

A new type of composite floor suitable for H-shaped steel girders in steel structures, please refer to Figure 1-5, and its invention points are:

The new laminated floor consists of H-shaped steel beams 1, prestressed slabs 2 supported between H-shaped steel beams, transverse steel bars 3 and longitudinal steel bars 4 laid on the prestressed slabs, and steel bars poured on the prestressed slabs. Concrete 5 is laminated.

The prestressed slab consists of the prestressed slab body 2-1, the transverse ribs 2-2 integrally poured on both ends of the lower part of the prestressed slab body along the direction of the slab width, and the integrally cast on both sides of the upper part of the prestressed slab body along the direction of the slab length. Longitudinal ribs 2-3 constitute. The transverse ribs at both ends are symmetrically inclined outwardly, and the transverse ribs at both ends are obliquely inserted into the inner space between the upper flange 1-1 and the lower flange 1-2 of the H-shaped steel beam at the corresponding end, and the transverse ribs The lower end face of the lower flange is fitted and fixed to the inner surface of the lower flange, which can be fixed in various ways, such as bolt connection, bonding and so on. There are prefabricated piercing holes on the longitudinal ribs on both sides, which can be used as reinforcement piercing and pipeline layout. The piercing holes are set 2-3-1 opposite to each other. Used as equipment pipeline layout. The transverse steel bars are installed in the piercing holes, the longitudinal steel bars are laid between the longitudinal ribs on both sides, and the concrete pouring grooves 2-4 are formed between the longitudinal ribs on both sides, and the concrete is poured and filled in the concrete pouring grooves and the hole diameter of the piercing hole is larger than the diameter of the transverse steel bar, and the gap between the piercing hole and the transverse steel bar is filled with concrete.

The above-mentioned longitudinal rib adopts the trapezoidal rib structure with the outer surface facing straight. On the one hand, it ensures the connection strength between the longitudinal rib and the prestressed plate body. On the other hand, along the transverse direction, the two adjacent prestressed plates The ribs form surface-to-surface contact.

In addition to the above characteristics, the new composite floor has the following characteristics:

The plane size is flexible, which can adapt to the requirements of building bays, variable depths and openings. The building function is good, and the total height of the laminated cover is less than the total height of the hollow floor, so the total height of high-rise buildings can be reduced and the space utilization rate can be improved.

The new composite floor applicable to the H-shaped steel girder of the steel structure is constructed by the following method, and the construction steps are as follows:

S1 Prefabricated prestressed slabs in the factory, in which the diameter of the piercing holes prefabricated on the longitudinal ribs is selected to be slightly larger than the diameter of the horizontal reinforcement laid later, so as to ensure that the concrete can fill the gap between the piercing holes and the horizontal reinforcement during subsequent pouring of concrete The space between and the construction requirements for pipeline layout.

S2 Arrange the H-shaped steel beams with prestressed slabs on the construction site to ensure that the surface of the lower flange of the H-shaped steel beams is clean and free of debris, so as to ensure that the H-shaped steel beams can be closely connected with the diagonally downward transverse ribs of the prefabricated slabs combined.

S3 Lift the prestressed plate to the predetermined position on the construction site, insert the transverse ribs at both ends of the prestressed plate into the H-shaped steel beams at the corresponding positions at both ends, and make the lower end of the transverse rib fit the lower flange of the H-shaped steel beam On the upper surface, after installation and splicing of multiple prestressed plates, they are kept flat and tightly connected without gaps, and the plates are in good contact with each other.

S4 Insert transverse steel bars into the piercing holes on the longitudinal ribs. In the case where pipelines need to be laid in the transverse direction, part of the piercing holes can be used as wiring holes; In the case where pipelines need to be laid, the equipment pipelines are arranged in the space between the longitudinal reinforcements. Pipelines include electrical pipelines, water pipelines, etc.

S5 After the laying of horizontal and vertical steel bars and the laying of equipment pipelines are completed, pour concrete in the concrete pouring groove between the longitudinal ribs on both sides of the prestressed slab. During the pouring process, the concrete should be filled between the horizontal steel bar and the piercing hole The gap between the concrete and the longitudinal ribs in the piercing hole will form a pin bolt effect, which can strengthen the integrity of the laminated floor and ensure that the surface of the floor after pouring is smooth and the floor has no voids or dents, and will not affect the next floor. stage construction.

S6 maintains the laminated floor after pouring concrete to form an assembled integral floor structure.

This construction method is a construction method of assembling first and then pouring. Since the prestressed slab has sufficient supporting strength, it is not necessary to set up temporary support for the floor slab during post-pouring, and it is directly poured in the concrete groove on the prestressed slab. In this way, the auxiliary man-hours for installing and dismantling the temporary support during construction can be greatly saved, the construction formwork is saved, the construction progress is accelerated, and the purpose of reducing the construction cost is achieved.

Although the embodiments and drawings of the utility model are disclosed for the purpose of illustration, those skilled in the art can understand that various replacements, changes and modifications can be made without departing from the spirit and scope of the utility model and the appended claims. It is possible, therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims (2)

1. a kind of novel superposed superstructure suitable for steel construction H profile steel beam, it is characterised in that: the novel superposed superstructure is by H-type Girder steel, the prestressed slab being supported between H profile steel beam, the transverse steel being layed on prestressed slab and longitudinal reinforcement, pour in Concrete folding on prestressed slab forms；

The transverse direction that prestressed slab is arranged in prestressed slab body lower part both ends along plate width direction by prestressed slab ontology, formed by integrally casting Floor and formed by integrally casting are constituted in longitudinal floor that two edge plate length direction of prestressed slab body upper part is arranged；Both ends are horizontal ribbed It is arranged in symmetrical outer incline, the horizontal ribbed oblique cutting respectively at both ends enters the inside between the upper lower flange of corresponding end H profile steel beam Space and the inner surface of horizontal ribbed lower end surface and lower flange fit fixation；Being prefabricated on the floor of two sides longitudinal direction can be used as Reinforcing bar installs the mounting hole with line layout, and mounting hole is oppositely arranged one by one；The transverse steel is threaded onto mounting hole, institute It states longitudinal reinforcement to be layed between the floor of both sides longitudinal direction, concreting groove is constituted between the floor of both sides longitudinal direction, concrete pours It builds and fills and leads up in concreting groove, and the aperture of mounting hole is greater than the diameter of transverse steel, in mounting hole and row steel Concrete is filled in the fit clearance of muscle.

2. the novel superposed superstructure according to claim 1 suitable for steel construction H profile steel beam, it is characterised in that: described vertical To floor using lateral surface in the trapezoidal rib structure faced directly.