CN103572874A - Method for constructing reinforced concrete composite floor slab of steel frame house - Google Patents

Abstract

The invention provides a method for constructing a reinforced concrete composite floor slab of a steel frame house. The method is characterized by including the steps of firstly, constructing a steel frame of the house, and arranging studs (2) on steel beams (1) of the steel frame; secondly, preparing precast slabs corresponding to the steel frame, reserving preformed holes (11) matched with the studs (2) in the two ends of each precast slab, and reserving transverse rabbet grooves (5) and longitudinal rabbet grooves (6) in the front face of each precast slab; thirdly, paving the two steal beams (1) where the floor slab needs to be constructed with the precast slabs (3,4) with the front faces facing upward, and matching the studs (2) at the two ends of the precast slab (3) and the two ends of the precast slab (4) into the preformed holes (11); fourthly, paving the transverse rabbet grooves (5) and the longitudinal rabbet grooves (6) with reinforcing steel bars (8,9); fifthly, forming the composite floor slab by pouring concrete cast-in-place layers (12) onto the precast slabs; sixthly, forming the floor slab of the steel frame house after maintenance and fitment are conducted.

Description

Construction method of reinforced concrete laminated slab for steel frame house

1. Technical field

The invention belongs to the technical field of building structures, and relates to a novel steel frame house, in particular to a construction method of reinforced concrete laminated floor slabs of a steel frame house with mortise and tenon.

2. Background technology

The steel structure house structure has light weight and good earthquake resistance. It does not need large-scale construction machinery during construction. The components are convenient for factory processing, energy-saving, land-saving, material-saving, and environmentally friendly. It has a series of advantages and is very suitable for use in house construction. However, the floor of this structural system generally adopts cast-in-place reinforced concrete floor slab or profiled steel plate concrete composite floor slab. The cast-in-place floor slab has good integrity, but it needs on-site formwork and maintenance after pouring concrete. The construction period is long and the loss of formwork is large. construction cost. The profiled steel plate on the bottom surface of the profiled steel plate concrete composite floor needs to be painted with anti-rust paint and fireproof paint, and temporary support needs to be added when pouring concrete, and the construction cost is relatively high. In contrast, prefabricated floor slabs do not require on-site formwork, the construction period is short, and the cost is low. However, the prefabricated components are heavy and difficult to hoist. Cracks are prone to occur at the spliced parts of the components, which is not good for anti-seepage and poor integrity. Since 1980, a large number of reinforced concrete prefabricated slabs have been used in masonry structures. Due to the insufficient length of the end of the prefabricated slab on the wall, the anchorage between the steel bars is insufficient, and the mutual restraint is weak. fell off, resulting in a large number of casualties. The patent application number is 201110005604.1, and the name is a patent for a reinforced concrete hollow floor slab, which discloses a reinforced concrete hollow floor slab, including reinforced concrete prefabricated components and cast-in-place concrete. The prefabricated components are easy to transport, easy to cut and shape, and easy to factory production. However, there is a problem that the connection between the floor slab and the steel beam is weak when this kind of floor slab is used in the steel structure house.

Laminated slab is a new type of slab manufacturing process that combines prefabricated and cast-in-place slab molding methods. During the construction process of the composite slab, the prefabricated bottom slab is first placed on the lower part. When the upper concrete is poured, the lower prefabricated slab can serve as a formwork, and the upper concrete curing is completed. The two parts of concrete are superimposed to form a whole to bear the external load. However, the problem of poor cooperation between the prefabricated slab and the cast-in-place concrete layer in the current laminated slab has not been well resolved. Therefore, it is imminent to study a new type of floor slab suitable for rapid construction of steel structure houses.

The mortise and tenon structure is an ancient Chinese building that uses wood, bricks and tiles as the main building materials, and the wood frame structure as the main structural method. The points are matched with mortise and tenon to form a flexible frame. Mortise and tenon is an extremely delicate invention. This method of component connection makes traditional Chinese wooden structures a special flexible structure that surpasses contemporary architectural bents, frames or rigid frames. It can not only bear large loads, but also allow certain The deformation of the structure absorbs a certain amount of seismic energy through deformation under seismic loads, reducing the seismic response of the structure.

3. Contents of the invention

The purpose of this invention is to try to apply the traditional mortise and tenon structure wood construction technology and modern steel structure house construction technology to the reinforced concrete assembly floor, and to design a steel frame house with reinforced concrete laminated floors and mortise and tenon joints. method.

Concrete technical scheme of the present invention is:

A method for constructing a reinforced concrete laminated slab of a steel frame house, characterized in that:

A. Build the steel frame of the house according to the conventional method, and set the studs at equal intervals on the upper surface of the steel beam of the steel frame;

B. Prepare a number of prefabricated reinforced concrete slabs that are compatible with the steel frame. There are reserved holes at both ends of the prefabricated slabs to match the studs. On the front of the prefabricated slabs, there are multiple rows of horizontal mortise grooves and multiple rows of longitudinal mortise grooves. , prepare enough steel bars, cement, sand and gravel;

C. Lay the front of the first prefabricated slab upwards on the two steel beams that need to be built on the floor. The bolts at both ends of the prefabricated slab are fitted in the reserved holes, and then the second prefabricated slab is attached to the first prefabricated slab. The front side is laid side by side on the steel beam until the set floor is covered;

D. Lay steel bars in the transverse mortise groove and longitudinal mortise groove;

E. Then pour the cast-in-place layer on the prefabricated slab according to the production method of the cast-in-place slab to form a reinforced concrete laminated floor slab;

F. After maintenance and decoration according to regulations, steel frame houses can be formed.

Among them, the cross-sectional shape of the horizontal tenon groove and the multi-longitudinal tenon groove is an inverted tapered groove with a large inside and a small outside, and the bottom of the cast-in-place layer and the tapered groove form a tenon hook structure.

A further solution is: the prefabricated slabs are divided into prefabricated end slabs and prefabricated middle slab edges, the prefabricated end slabs are laid on both sides of the floor slab, and the prefabricated middle slab edges are laid between the prefabricated end slabs on both sides.

A further solution is: half grooves are arranged on both sides of the prefabricated middle plate.

In the present invention, the studs can be fixed on the steel beams by welding or other methods. The mortise and groove can increase the bonding force between the prefabricated slab and the cast-in-place layer, solve the problem of low bonding force between the ordinary laminated slab and the prefabricated panel, and improve the ability to work together between layers.

In practice, the formwork at the end of the steel bar in the tenon groove can also be used to support the formwork, and the steel bar provides tension to ensure the reliability of the connection between the formwork at both ends, and then the overall concrete is poured.

After the two prefabricated bottom slabs are spliced, the two semi-grooves form a complete groove. After pouring the upper concrete, the left and right prefabricated slabs form a whole. The pouring of the upper concrete makes the gap between the two bottom slabs well obtained. Filling, the existence of the groove changes the water penetration path, so that the waterproof and anti-seepage performance can be significantly improved.

The advantages of the present invention are:

(1) The mortise and tenon groove can enhance the ability of the new and old concrete to work together; (2) The prefabricated panel is processed in a factory, with fast construction, good reliability, low cost and superior performance. When pouring the upper part of the concrete, in addition to the need for support formwork around the building, no additional formwork is required at the bottom, which reduces the amount of formwork used; no need to set the bottom support of the slab, reduces the construction process, and improves the construction speed. (3) The present invention considers the construction of the pipeline in the building structure, and utilizes the mortise groove or the half-groove existing on the bottom plate during the pipeline construction to facilitate the passage of the pipeline. (4) The present invention is beneficial to realize the modularization of steel structure design, industrialized production, and standardized construction, and can further promote the industrialization process of steel structure houses. (5) The post-cast composite layer concrete can be constructed together with the floor and floor tiles during the decoration period after the overall construction of the house is completed, so as to increase the construction speed and reduce the construction links. (6) The lower prefabricated slab of the present invention is provided with mortise grooves, which can improve the ability of the new and old concrete to work together, and change the permeation path of the floor water, which can prevent seepage and corrosion of steel bars in the slab. effect.

4. Description of drawings

Fig. 1 is a three-dimensional schematic diagram of a laminated floor slab in the present invention.

Fig. 2 is a three-dimensional schematic diagram of the prefabricated end plate in the present invention.

Fig. 3 is a schematic longitudinal sectional view of the prefabricated end plate in the present invention.

Fig. 4 is a schematic cross-sectional view of a prefabricated end plate in the present invention.

Fig. 5 is a three-dimensional schematic diagram of the prefabricated middle plate in the present invention.

Fig. 6 is a schematic longitudinal sectional view of the prefabricated intermediate plate in the present invention.

Fig. 7 is a schematic cross-sectional view of the prefabricated intermediate plate in the present invention.

Fig. 8 is a schematic diagram of the embedded bolts on the beam in the invention.

In the figure: 1-steel beam, 2-bolt, 3-prefabricated end plate, 4-prefabricated middle plate, 5-transverse tenon groove, 6-longitudinal tenon groove, 7-half groove, 8-transverse reinforcement, 9-longitudinal reinforcement, 10-reinforcement in prefabricated slab, 11-reserved hole, 12-cast-in-place concrete layer.

5. Specific implementation methods:

The present invention will be further described below in conjunction with the accompanying drawings, but the present invention is not limited to the following examples.

As shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, Fig. 8, a method for constructing a reinforced concrete laminated slab of a steel frame house is characterized in that:

A. Build the steel frame of the house according to the conventional method, and set the studs 2 at equal intervals on the upper surface of the steel beam 1 of the steel frame;

B. Prepare a number of prefabricated reinforced concrete slabs that are compatible with the steel frame. There are reserved holes 11 at both ends of the prefabricated slabs to match the studs 2. There are multiple rows of horizontal tenon grooves 5 and multiple vertical columns on the front of the prefabricated slabs. Tenon groove 6, prepare enough steel bars 8 or 9, cement, sand and stone;

C. Lay the front of the first prefabricated slab upwards on two steel beams 1 that need to be built on the floor. The pegs 2 at both ends of the prefabricated slab are fitted into the reserved holes 11, and then close to the first prefabricated slab and place the second The front of the prefabricated slab is laid side by side on the steel beam 1 until the set floor is covered;

D. Lay reinforcing bars 8 or 9 in the transverse mortise groove 5 and the longitudinal mortise groove 6;

E, pour concrete cast-in-place layer 12 on the prefabricated slab then by the manufacture method of cast-in-place slab and just form reinforced concrete laminated floor slab;

F. After maintenance and decoration according to the regulations, the floor slab of the steel frame house will be formed.

Among them, the cross-sectional shapes of the horizontal mortise groove 5 and the multi-longitudinal mortise groove 6 are inverted tapered grooves with a large inside and a small outside, and the bottom of the concrete cast-in-place layer 12 and the tapered grooves form a tenon hook structure. The prefabricated panels are divided into prefabricated end panels 3 and prefabricated middle panel sides 4. The prefabricated end panels 3 are laid on both sides of the floor slab, the prefabricated middle panel sides 4 are laid between the prefabricated end panels 3 on both sides, and the two sides of the prefabricated middle panel sides 4 are provided with semi-grooves 7.

Claims (3)

1. a construction method for the reinforced concrete laminated floor slab of building of steel frame construction, is characterized in that:

A, build house steel frame according to a conventional method, and at gooseneck (1) the upper surface spaced set peg (2) of steel frame;

The reinforced concrete floor precast plate (3,4) that B, preparation polylith and steel frame adapt, the preformed hole (11) coordinating with peg (2) is left at precast plate (3,4) two ends, many row's horizontal tenon mouth grooves (5) and the longitudinal tenon mouth of multiple row groove (6) are left in precast plate (3,4) front, prepare enough reinforcing bars (8,9), cement, sandstone;

C, first precast plate (3,4) faced up to tiling to two goosenecks (1) that need to build floor, precast plate (3,4) two ends pegs (2) are engaged in preformed hole (11), be close to again first precast plate (3,4) second precast plate (3,4) faced up and be laid in side by side gooseneck (1) above, until be paved with setting flooring;

D, at horizontal tenon mouth groove (5) and longitudinal laying reinforcing bar (8,9) in tenon mouth groove (6);

E, then on precast plate (3,4), by the preparation method of Bars In Poured Concrete Slab, build in-situ layer (12) and just form reinforced concrete laminated floor slab;

After F, maintenance in accordance with regulations, finishing, just form the floor of building of steel frame construction;

Wherein, laterally tenon mouth groove (5) and many longitudinally cross sectional shapes of tenon mouth groove (6) are all interior large outer little back taper grooves, and the bottom of concrete cast-in-situ layer (12) and cone tank form hooking tenon structure.

2. the construction method of the reinforced concrete laminated floor slab of building of steel frame construction according to claim 1, it is characterized in that: precast plate (3,4) is divided into prefabricated end plate (3) and prefabricated middle edges of boards (4), prefabricated end plate (3) is laid on floor both sides, and prefabricated middle edges of boards (4) are laid between the prefabricated end plates in both sides (3).

3. the construction method of the reinforced concrete laminated floor slab of building of steel frame construction according to claim 2, is characterized in that: in the middle of prefabricated, edges of boards (4) both sides are provided with half groove (7).

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