CN205314329U - One -way composite floor slab of die mould steel plate concrete of built -in hollow square steel pipe - Google Patents

Abstract

The utility model discloses a profiled steel plate concrete unidirectional composite floor with built-in hollow square steel pipes, comprising profiled steel plates, hollow square steel pipes, profiled steel plates laid on steel beams, grooves of profiled steel plates and unidirectional composite floors The short span direction is parallel, the hollow square steel pipe is placed in the groove of the profiled steel plate and does not touch the bottom of the groove, the steel bar is set above the hollow square steel tube, and the formwork is poured on the side of the profiled steel plate to support the formwork to form a one-way composite floor. The utility model has a built-in hollow square steel pipe with a large bearing capacity. Under the same bearing capacity, it is lighter in weight and smaller in thickness than ordinary floor slabs, which improves the net height of the floor and reduces the cost. It can be applied in large spaces, large spans, and large loads. in the one-way slab structure.

Description

One-way composite floor with profiled steel plate and concrete with built-in hollow square steel pipe

technical field

The utility model belongs to the technical field of building structures, in particular to a profiled steel plate concrete one-way composite floor with built-in hollow square steel pipes.

Background technique

At present, in my country's industrial and civil buildings, reinforced concrete structure is still the most widely used architectural structure form due to its wide range of raw materials, mature technology and low cost. However, with the improvement of building height and anti-seismic requirements, as well as the increasing requirements of modern buildings for storey height, large span and large space, the application of reinforced concrete structures has been more restricted. In recent years, the development of reinforced concrete composite structures has brought many advantages, and more and more pressed steel plate concrete composite floors are used as building floor systems in composite structures.

However, the following technical problems exist in the traditional reinforced concrete floor slab and the composite steel plate-concrete composite floor system: (1) The cast-in-place reinforced concrete floor slab: the self-weight is too large, the formwork needs to be set up and demolished, and the construction is troublesome and the construction period is long. Beams and slabs often cannot meet the requirements of building net height and increase the storey height, and the poor seismic performance of non-beam slabs is prone to disturbance and cracks. (2) Profiled steel plate concrete composite floor: The thickness of the long-span profiled steel plate concrete composite floor is too thick and the self-heavy, the bonding ability between the profiled steel plate and concrete is poor. Research on longitudinal shear bond bearing capacity of steel plate composite floor, "Sichuan Building Science Research" 2012, 38 (02): 52-54) verified through experiments that one of the main failure modes of profiled steel composite floor is longitudinal horizontal shear bond If the joint is damaged, the lack of sufficient bonding capacity will make the composite floor of the profiled steel plate lose its combined effect.

Utility model content

The purpose of the utility model is to provide a profiled steel plate concrete one-way composite floor with built-in hollow square steel pipes with high bearing capacity, light weight and convenient construction.

The technical solution to realize the purpose of this utility model is: a profiled steel plate concrete unidirectional composite floor with built-in hollow square steel pipes, including profiled steel plates, hollow square steel tubes, profiled steel plates laid on steel beams, and concaves of profiled steel plates The groove is parallel to the short-span direction of the one-way composite floor. The hollow square steel pipe is placed in the groove of the profiled steel plate and does not touch the bottom of the groove. The steel bar is placed above the hollow square steel tube, and the formwork is poured on the side of the profiled steel plate to support the formwork. One-way composite floor.

Compared with the prior art, the utility model has significant advantages: (1) The built-in hollow square steel pipe has a large bearing capacity. Under the same bearing capacity, it is lighter in weight and smaller in thickness than ordinary floor slabs, and the net height of the floor is improved. It reduces the cost and can be applied to one-way slab structures with large spaces, large spans, and heavy loads. (2) The hollow square steel pipe is integrated with the profiled steel plate through the triangular support connected by welding, which increases the contact surface between the steel and the concrete, and improves the bonding force between the concrete and the composite plate. (3) Hollow square steel pipes and profiled steel plates can be prefabricated in factories, the quality is easy to be guaranteed, and the construction mechanization rate is high; (4) The profiled steel plates are self-supporting as the lower formwork during construction, which is convenient for construction, shortens the construction period, and saves formwork.

Below in conjunction with accompanying drawing, the utility model is described in further detail.

Description of drawings

Fig. 1 is a structural schematic diagram of the one-way composite floor of the present invention.

Fig. 2 is a sectional view of the utility model.

detailed description

Combined with Fig. 1 and Fig. 2, the profiled steel plate concrete unidirectional composite floor with built-in hollow square steel pipe of the utility model includes profiled steel plate 2, hollow square steel tube 3, profiled steel plate 2 is laid on the steel beam, and profiled steel plate 2 The groove 7 is parallel to the direction of the short span of the one-way composite floor. The hollow square steel pipe 3 is placed at the groove 7 of the profiled steel plate 2 and does not contact the bottom of the groove 7. A reinforcing bar 5 is set above the hollow square steel pipe 3. The side support formwork of the steel plate 2 pours the concrete 1 to form a one-way composite floor slab.

The steel bars 5 can be arranged in a single layer and arranged vertically and horizontally. A concrete protective layer is set on the reinforcement 5.

One end of the triangular support 4 is welded to the hollow square steel pipe 3, and the other end is welded to the rib top 8 of the profiled steel plate 2. A plurality of triangular supports 4 arranged at intervals according to needs will suspend the hollow square steel tube 3 in the recess of the profiled steel plate 2. in slot 7.

Example

In the construction process of the utility model, the profiled steel plate 2 is first laid on the steel beam (the profiled steel plate is placed on the bottom layer), the groove 7 of the profiled steel plate is parallel to the direction of the short span of the one-way composite floor, and the profiled steel plate 2 It is fixed on the steel beam to realize self-supporting and acts as the lower formwork and also plays the role of the lower part of the slab. Then the hollow square steel pipe 3 is placed in the groove 7 of the profiled steel plate 2 and has a certain distance from the bottom of the groove 7, and the hollow square steel pipe 3 is supported by the triangular support 4 arranged by interval welding so that the hollow square steel pipe 3 is suspended in the press. In the groove 7 of the profiled steel plate, one end of the triangular support 4 is welded with the hollow square steel pipe 3, and the other end is welded with the rib top 8 of the profiled steel plate to form a weld 6. Then arrange single-layer two-way steel bars 5 on the top of the hollow square steel pipe 3 and leave an appropriate concrete protective layer, and finally support the side formwork to pour concrete 1 .

Claims (4)

1. A profiled steel plate concrete unidirectional composite floor with built-in hollow square steel pipes is characterized in that it comprises profiled steel plates (2), hollow square steel tubes (3), and profiled steel plates (2) are laid on the steel beams, and profiled The groove (7) of the steel plate (2) is parallel to the short-span direction of the one-way composite floor, and the hollow square steel pipe (3) is placed at the groove (7) of the profiled steel plate (2) and does not touch the bottom of the groove (7). For contact, a steel bar (5) is arranged above the hollow square steel pipe (3), and concrete (1) is poured on the side support formwork of the profiled steel plate (2) to form a one-way composite floor slab. 2. The profiled steel plate concrete unidirectional composite floor slab with built-in hollow square steel pipe according to claim 1, characterized in that the steel bars (5) are arranged in a single layer and vertically and horizontally. 3. The profiled steel plate concrete one-way composite floor with built-in hollow square steel pipe according to claim 1 or 2, characterized in that a concrete protective layer is set on the steel bar (5). 4. according to claim 1 or 2 described built-in profiled steel plate concrete unidirectional composite floor of hollow square steel tube, it is characterized in that one end of triangular support (4) is welded with hollow square steel tube (3), and the other end is welded with profiled steel plate ( 2) The rib top (8) is welded, and the hollow square steel pipe (3) is suspended in the groove (7) of the profiled steel plate (2) by a plurality of triangular supports (4) arranged at intervals as required.