CN111305439A - Laminated slab with disassembly-free die steel frame - Google Patents

Abstract

The invention discloses a laminated slab with a form-removal-free steel frame and a construction method, which consists of a detachable steel frame, bolts, prefabricated slabs and post-cast concrete; the detachable steel frame consists of a folded plate and a flat steel, the folded plate and the flat steel are connected by a bolt, and the prefabricated plate is provided with an embedded nut or a reserved screw hole; the detachable steel frame can also adopt section steel, channel steel or I-steel, and the flange or web of the channel steel or the I-steel is provided with a hole which is matched with the prefabricated plate. The construction method comprises the following steps: manufacturing a prefabricated plate with a pre-buried screw cap or a reserved screw hole; bolts penetrate through the holes to connect the precast slabs with the detachable steel frames or the channel steels or the I-shaped steels; and hoisting the assembled detachable steel frame or channel steel or I-steel and the prefabricated slab to the elevation of the construction surface, binding steel bars on the prefabricated slab, pouring concrete, dismantling bolts when the concrete reaches a certain strength, and removing the detachable steel frame or channel steel or I-steel to form the laminated floor.

Description

A composite board with a formwork-free steel frame

technical field

The invention relates to the field of building construction, in particular to a composite board with a formwork-free steel frame.

Background technique

The prefabricated laminated floor is an important part of the prefabricated structure. In the prefabricated structure, the laminated floor plays an important role. The superimposed floor bears the vertical load from the floor, and transfers the floor load to the structural beams and structural columns; the rigidity of the floor in the plane is relatively large, and the adjacent vertical members are coordinated to resist the horizontal force.

The superimposed floor slab is a relatively mature structural component in the prefabricated structure. At present, there are mainly three types of laminated floor technologies: 1. reinforced truss laminated slab; 2. ribbed prestressed reinforced concrete prefabricated slab; 3. prefabricated slab. These existing technologies can basically meet the requirements of prefabricated structures for horizontal members, but there are still certain deficiencies.

These deficiencies are embodied in three aspects: 1. The reinforced truss composite panels and the ribbed prestressed reinforced concrete prefabricated panels are generally strip-shaped. In the actual construction process, several strip-shaped panels need to be assembled into a whole panel. When complete, concrete is poured over it to form a monolithic laminate floor. The problem with the two is that the reinforcement bars of the bottom plate are arranged along the length of the strip, and the reinforcement method is one-way, and the reinforcement in the other direction is distributed reinforcement or secondary reinforcement. There are still some differences between cast-in-place two-way slabs. 2. The existence of longitudinal reinforced truss or longitudinal ribs on the reinforced truss composite plate and the ribbed prestressed reinforced concrete precast plate hinders the flexible arrangement of pipelines to a certain extent. 3. The prefabricated large plate itself is large in size and self-heavy. In order to effectively control the deformation during construction and hoisting, in engineering practice, it is often necessary to increase the thickness of the bottom plate, and large transportation and hoisting equipment is required during transportation and installation, which is more difficult to transport and construct. big.

These deficiencies in the prior art restrict the development of prefabricated structures to a certain extent.

In the future prefabricated structure, the development trend of superimposed floor slabs will be thinner prefabricated bottom plates, better mechanical performance of the two-way arrangement of steel bars, and more flexible layout of embedded pipelines.

The new laminated floor slabs that can conform to these future development trends will have greater vitality and engineering application value.

SUMMARY OF THE INVENTION

The purpose of the present invention is to overcome the shortcomings of the prior art, and to provide a composite board with a formwork-free steel frame and a construction method. Wide range, steel frame can be recycled and so on.

The purpose of the present invention is to achieve in this way, a composite board with a formwork-free steel frame and a construction method, which is composed of a detachable steel frame, bolts, prefabricated panels and post-cast concrete; the detachable steel frame is composed of a folded plate and a flat plate It is composed of steel, the folded plate and the flat steel are connected by bolts, and the prefabricated plate has embedded nuts or reserved screw holes. Since the prefabricated plate has embedded nuts or reserved screw holes, the prefabricated plate can be connected to the detachable steel frame or channel steel or I-beam through bolts. The detachable steel frame can also be made of section steel, channel steel or I-beam, and the channel or I-beam flanges or webs have holes adapted to the prefabricated plates. Bolts can connect prefabricated panels to channel steel or I-beam through holes. The detachable steel frame has greater rigidity, which can play a supporting role in the construction process and can be reused. The prefabricated slab can act as a formwork, and can also be co-stressed with the post-cast concrete to form a superimposed floor slab. Since the prefabricated board is a flat plate, it is more suitable for the arrangement of pipelines.

The invention is characterized in that the detachable steel frame has transverse ribs. The transverse ribs can strengthen the connection of the detachable steel frame and improve the lateral rigidity of the detachable steel frame.

The present invention is characterized in that the detachable steel frame or the channel steel or the I-beam is connected by a transverse plate. The transverse plate can strengthen the connection of the detachable steel frame and improve the lateral rigidity of the detachable steel frame.

The present invention is characterized in that there are two or more detachable steel frames or channel steels or I-beams on the prefabricated plate. Two or more detachable steel frames or channel steels or I-beams have greater rigidity, which can prevent the back arch of the bottom plate under the action of prestressed steel bars, and is suitable for the construction of large-span stacked floors.

A construction method for a composite board with a formwork-free steel frame, comprising the following steps: making a prefabricated board with pre-embedded nuts or reserved screw holes; connecting the prefabricated board with a detachable steel frame or channel steel or I-beam connection; hoist the assembled detachable steel frame or channel steel or I-beam and prefabricated plate to the elevation of the construction surface, bind steel bars on the prefabricated plate, pour concrete, and when the concrete reaches a certain strength, remove the bolts, remove Take the removable steel frame or channel steel or I-beam to form a laminated floor.

The composite board with a formwork-free steel frame has the advantages of convenient construction, high construction speed and simple production of the prefabricated board. The dismantling steel frame or channel steel or I-beam can be prefabricated in the workshop, with small size, light weight, convenient transportation, low requirements for transportation tools and hoisting equipment, in line with the development direction of construction industrialization and mass production, and has a good economy. benefits and social benefits.

This dismantled steel frame or channel or I-beam with prefabricated panels can also be used for shear wall construction.

Description of drawings

Figure 1 is a schematic structural diagram of a folded plate and a prefabricated plate, 3 is a prefabricated plate, 4 is a folded plate, and 6 is a hole.

Figure 2 is a schematic structural diagram of a detachable steel frame, 1 is a detachable steel frame, 2 is a bolt, and 5 is a flat steel.

Figure 3 is a schematic structural diagram of a detachable steel frame and a prefabricated panel.

Fig. 4 is another embodiment of a detachable steel frame and a prefabricated plate, 7 is a transverse rib, and 8 is a transverse plate.

Figure 5 is a schematic structural diagram of a detachable steel frame using channel steel.

FIG. 6 is another embodiment of a detachable steel frame and a prefabricated panel.

FIG. 7 is a schematic diagram of the assembly structure of the detachable steel frame and the prefabricated plate.

FIG. 8 is a schematic structural diagram of pouring concrete on a precast panel.

FIG. 9 is a schematic structural diagram of the laminated board after the detachable steel frame is removed.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings.

The present invention is shown in the accompanying drawings 1-9, the purpose of the present invention is to achieve in this way, a composite plate with a formwork-free steel frame and a construction method, which is composed of a detachable steel frame 1, bolts 2, prefabricated plates 3, rear The detachable steel frame 1 is composed of a folded plate 4 and a flat steel 5, the folded plate 4 and the flat steel 5 are connected by bolts, and the prefabricated plate 3 has embedded nuts or reserved screw holes. The detachable steel frame 1 can also be made of section steel, channel steel or I-beam, and the channel or I-beam flange or web has holes 6 that are compatible with the prefabricated plate 3 .

Fig. 1 is a schematic structural diagram of a folded plate and a prefabricated plate, Fig. 2 is a structural schematic diagram of a detachable steel frame, and Fig. 3 is a structural schematic diagram of a detachable steel frame and a prefabricated plate.

The feature of the present invention is that the detachable steel frame 1 has transverse ribs 7 on it. Fig. 4 is another embodiment of a detachable steel frame and a prefabricated panel. There are two detachable steel frames 1 on the prefabricated panel 3, and transverse ribs 7 are provided on the detachable steel frame 1. Board 8 is connected.

The present invention is characterized in that the detachable steel frame or the channel steel or the I-beam is connected by the transverse plate 8 .

The present invention is characterized in that the prefabricated plate 3 has two or more detachable steel frames 1 or channel steel or I-beam. Figure 5 is a schematic structural diagram of a detachable steel frame using channel steel. FIG. 6 is another embodiment of a detachable steel frame and a prefabricated panel.

A construction method for a composite plate with a formwork-free steel frame, comprising the following steps: making a prefabricated plate 3 with embedded nuts or reserved screw holes; using bolts 2 to pass through holes 6 to connect the prefabricated plate 3 to the detachable steel frame 1 or channel steel or I-beam connection; hoist the assembled detachable steel frame 1 or channel steel or I-beam and prefabricated slab 3 to the elevation of the construction surface, bind steel bars on the prefabricated slab 3, pour concrete, wait for concrete To achieve a certain strength, remove the bolt 2, remove the detachable steel frame 1 or channel steel or I-beam to form a superimposed floor. FIG. 7 is a schematic diagram of the assembly structure of the detachable steel frame and the prefabricated plate. FIG. 8 is a schematic structural diagram of pouring concrete on a precast panel. FIG. 9 is a schematic structural diagram of the laminated board after the detachable steel frame is removed.

Claims (5)

1. The invention discloses a laminated slab with a form-removal-free steel frame and a construction method, which consists of a detachable steel frame (1), bolts (2), a prefabricated slab (3) and post-cast concrete; the detachable steel frame (1) consists of a folded plate (4) and a flat steel (5), the folded plate (4) and the flat steel (5) are connected by bolts, and the prefabricated plate (3) is provided with an embedded nut or a reserved screw hole; the detachable steel frame (1) can also adopt section steel, channel steel or I-steel, and holes (6) matched with the precast slabs (3) are arranged on flanges or webs of the channel steel or the I-steel.

2. The split-free steel frame composite slab as claimed in claim 1, wherein: the detachable steel frame (1) is provided with transverse ribs (7).

3. The split-free steel frame composite slab as claimed in claim 1, wherein: the detachable steel frame (1) or the channel steel or the I-steel are connected through a transverse plate (8).

4. The split-free steel frame composite slab as claimed in claim 1, wherein: the precast slab is provided with two or more detachable steel frames (1) or channel steel or I-steel.

5. A construction method of a laminated slab with a form-removal-free steel frame comprises the following steps: manufacturing a prefabricated plate (3) with a pre-buried screw cap or a reserved screw hole; bolts (2) penetrate through the holes (6) to connect the precast slabs (3) with the detachable steel frame (1) or the channel steel or the I-steel; and hoisting the assembled detachable steel frame (1) or channel steel or I-steel and the prefabricated slab (3) to the elevation of the construction surface, binding reinforcing steel bars on the prefabricated slab (3), pouring concrete, removing the bolts (2) when the concrete reaches a certain strength, and removing the detachable steel frame (1) or the channel steel or the I-steel to form the laminated floor.

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