CN111305437B - Beam-slab connection structure of prefabricated concrete structure and construction method thereof - Google Patents
Beam-slab connection structure of prefabricated concrete structure and construction method thereof Download PDFInfo
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- CN111305437B CN111305437B CN201911342389.7A CN201911342389A CN111305437B CN 111305437 B CN111305437 B CN 111305437B CN 201911342389 A CN201911342389 A CN 201911342389A CN 111305437 B CN111305437 B CN 111305437B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/17—Floor structures partly formed in situ
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
- E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
- E04B5/17—Floor structures partly formed in situ
- E04B2005/176—Floor structures partly formed in situ with peripheral anchors or supports
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Abstract
The invention discloses a beam-slab connection structure of an assembled concrete structure and a construction method thereof, aiming at providing a beam-slab connection structure which can enable anchor bars of a prefabricated floor slab to be anchored into a support concrete beam so as to ensure the structural safety of the beam-slab connection structure of the assembled concrete structure; and the problem that the anchor bars of the prefabricated floor slab interfere with the reinforcement cage of the support concrete when the prefabricated floor slab is hoisted can be avoided. A beam-slab connection structure of an assembly type concrete structure comprises a support concrete beam, a prefabricated floor slab and a cast-in-place laminated floor slab, wherein a reinforcement cage is arranged in the support concrete beam, a prefabricated floor slab reinforcement mesh is arranged in the prefabricated floor slab, at least part of reinforcements in the prefabricated floor slab reinforcement mesh extend out of the prefabricated floor slab, and anchor bars are formed on the outer side of the prefabricated floor slab; the top of steel reinforcement cage is equipped with the anchor bar that is used for holding the anchor bar and holds the mouth, and the anchor bar is located anchor bar and holds the mouth.
Description
Technical Field
The invention relates to the technical field of prefabricated concrete structures, in particular to a beam-slab connection structure of a prefabricated concrete structure and a construction method thereof.
Background
The prefabricated concrete structure is used as an important construction means of a prefabricated building, and the development of a concrete structure assembling technology is directly determined by a safe, reliable, convenient and efficient connection mode among prefabricated parts, plates, columns, walls and other members. Wherein, the prefabricated floor in traditional assembled concrete structure's beam slab joint construction has two kinds with the connected mode of roof beam: firstly, the precast floor slab adopts a rib outlet structure, the rib outlet of the precast floor slab forms an anchor rib to be anchored into the support concrete beam, and the safety of the concrete floor slab structure of the method can be effectively ensured; however, as the support concrete beam and the reinforcement cage therein both adopt rectangular cross sections, when the precast floor slab is hoisted, the anchor bars of the precast floor slab interfere with the reinforcement cage of the support concrete, so that the hoisting of the precast floor slab is difficult, and the installation efficiency is greatly influenced; and secondly, the prefabricated floor slab cancels the rib, namely the prefabricated floor slab adopts a structure without anchoring into the support concrete beam, and the method solves the problem that the rib of the prefabricated floor slab interferes with the reinforcement cage of the support concrete beam when the prefabricated floor slab is hoisted, but the method saves the structure that the prefabricated floor slab is anchored into the support concrete beam, so that the safety and reliability of the concrete floor slab structure are reduced, the integrity of the floor slab is weakened, and certain potential safety hazards of the structure exist.
Disclosure of Invention
The invention aims to provide a beam-slab connection structure which can enable anchor bars of a prefabricated floor slab to be anchored into a support concrete beam so as to ensure the structural safety of the beam-slab connection structure of an assembled concrete structure; and the beam-slab connection structure of the prefabricated concrete structure and the construction method thereof can avoid the problem that the prefabricated floor slab is difficult to hoist due to the interference between the anchor bars of the prefabricated floor slab and the reinforcement cage of the support concrete when the prefabricated floor slab is hoisted.
The technical scheme of the invention is as follows:
a beam-slab connection structure of an assembly type concrete structure comprises a support concrete beam, a prefabricated floor slab and a cast-in-place laminated floor slab, wherein a reinforcement cage is arranged in the support concrete beam, a prefabricated floor slab reinforcement mesh is arranged in the prefabricated floor slab, at least part of reinforcements in the prefabricated floor slab reinforcement mesh extend out of the prefabricated floor slab, and anchor bars are formed on the outer side of the prefabricated floor slab; the top of the reinforcement cage is provided with an anchor bar accommodating port for accommodating an anchor bar, so that the anchor bar can enter the anchor bar accommodating port from top to bottom in the process of hoisting the prefabricated floor slab from top to bottom in place, and the anchor bar cannot interfere with the reinforcement cage; the anchor bars are positioned in the anchor bar accommodating openings; the cast-in-place laminated floor slab is a cast-in-place laminated floor slab which is cast in place, the cast-in-place laminated floor slab is positioned above the prefabricated floor slab, and the cast-in-place laminated floor slab, the prefabricated floor slab and the support concrete beam are combined into a whole. Therefore, the anchor bars of the prefabricated floor slab can be anchored into the support concrete beam, so that the structural safety of the beam-slab connection structure of the fabricated concrete structure is ensured; and the problem that the precast floor slab is difficult to hoist due to the interference of the anchor bars of the precast floor slab and the reinforcement cage of the support concrete can be avoided when the precast floor slab is hoisted.
Preferably, the support concrete beam comprises a prefabricated part and a cast-in-place part, the reinforcement cage is in an inverted T shape and comprises a main reinforcement cage and a beam top reinforcement cage located above the main reinforcement cage, the main reinforcement cage is embedded in the prefabricated part, the beam top reinforcement cage is located above the prefabricated part, notches located on two sides of the beam top reinforcement cage form the anchor bar accommodating port, the cast-in-place part of the support concrete beam is formed by casting together with the cast-in-place laminated floor slab, and after the cast-in-place part of the support concrete beam is formed by casting, the anchor bars are anchored into the support concrete beam. Therefore, the anchor bars of the prefabricated floor slab can be anchored into the support concrete beam, so that the structural safety of the beam-slab connection structure of the fabricated concrete structure is ensured; and the problem that the precast floor slab is difficult to hoist due to the interference of the anchor bars of the precast floor slab and the reinforcement cage of the support concrete can be avoided when the precast floor slab is hoisted.
Preferably, the reinforcement cage is the font of falling T, and it includes main reinforcement cage and the roof beam top reinforcement cage that is located main reinforcement cage top, the breach of roof beam top reinforcement cage both sides constitutes the anchor bar holds the mouth, the formation is pour with cast-in-place coincide layer floor together to the support concrete beam, after the formation is pour to the support concrete beam, the anchor bar anchors in the support concrete beam. Therefore, the anchor bars of the prefabricated floor slab can be anchored into the support concrete beam, so that the structural safety of the beam-slab connection structure of the fabricated concrete structure is ensured; and the problem that the precast floor slab is difficult to hoist due to the interference of the anchor bars of the precast floor slab and the reinforcement cage of the support concrete can be avoided when the precast floor slab is hoisted.
Preferably, the reinforcement cage is composed of a plurality of beam longitudinal bars and beam stirrups, and the height of the beam longitudinal bar at the highest position in the beam longitudinal bars is higher than that of the anchor bars.
Preferably, the end of the anchor bar is provided with a bent section formed by bending. Therefore, the length of the anchor bars anchored into the support concrete beam can be effectively increased, and the structural safety of the beam-slab connection structure of the fabricated concrete structure is further improved; and the length of the anchor bars extending into the support concrete beam in the width direction can not be increased, namely the width of the support concrete beam is not required to be increased.
Preferably, the angle between the bending section and the anchor bar is 0-90 degrees, and the length of the bending section is more than or equal to 5 times of the diameter of the anchor bar.
Preferably, the distance that the anchor bars extend into the support concrete beam in the width direction of the support concrete beam is greater than or equal to 7.5 times the diameter of the anchor bars.
Preferably, the reinforcement cage is composed of a plurality of beam longitudinal reinforcements and beam stirrups, the distance between the central line of the beam longitudinal reinforcement at the highest position in the beam longitudinal reinforcements and the top surface of the cast-in-place laminated floor slab is L, L = c + d + R, wherein c is the thickness of the beam concrete protective layer, and the thickness of the beam concrete protective layer is more than or equal to 20 mm; d is the diameter of the stirrup; and R is the radius of the beam longitudinal rib.
Preferably, the support concrete beam adopted by the beam-slab connection structure of the fabricated concrete structure is calculated according to the section of the inverted T-shaped reinforcement cage in the design process, and the width and the height of the support concrete beam and the size and the type of the steel bars used by the reinforcement cage are determined.
A construction method of a beam-slab connection structure of an assembly type concrete structure sequentially comprises the following steps:
firstly, installing a temporary support;
secondly, hoisting the prefabricated part of the support concrete beam in place, and supporting the prefabricated part through temporary support;
thirdly, hoisting the prefabricated floor slab from top to bottom in place, and supporting the prefabricated floor slab through temporary supports; in the process of hoisting the prefabricated floor slab from top to bottom to be in place, the anchor bars enter the anchor bar accommodating openings from top to bottom, and the anchor bars do not interfere with the reinforcement cage; after the prefabricated floor slab is hoisted in place, the anchor bars are positioned in the anchor bar accommodating openings;
and fourthly, constructing a cast-in-place part of the cast-in-place laminated floor slab and the support concrete beam, casting the cast-in-place part of the support concrete beam and the cast-in-place laminated floor slab together, and anchoring the anchor bars into the support concrete beam after the cast-in-place part of the support concrete beam is cast.
According to the construction method of the beam-slab connection structure of the prefabricated concrete structure, the anchor bars of the prefabricated floor slab can be anchored into the support concrete beam, so that the structural safety of the beam-slab connection structure of the prefabricated concrete structure is ensured; and the problem that the precast floor slab is difficult to hoist due to the interference of the anchor bars of the precast floor slab and the reinforcement cage of the support concrete can be avoided when the precast floor slab is hoisted.
A construction method of a beam-slab connection structure of an assembly type concrete structure sequentially comprises the following steps:
firstly, mounting a temporary support and a beam template;
secondly, binding a reinforcement cage of the support concrete beam in the beam template, or hoisting a prefabricated reinforcement cage into the beam template;
thirdly, hoisting the prefabricated floor slab from top to bottom in place, and supporting the prefabricated floor slab through temporary supports; in the process of hoisting the prefabricated floor slab from top to bottom to be in place, the anchor bars enter the anchor bar accommodating openings from top to bottom, and the anchor bars do not interfere with the reinforcement cage; after the prefabricated floor slab is hoisted in place, the anchor bars are positioned in the anchor bar accommodating openings;
and fourthly, constructing the cast-in-place laminated floor slab and the support concrete beam, pouring the support concrete beam and the cast-in-place laminated floor slab together to form the support concrete beam, and anchoring the anchor bars into the support concrete beam after the support concrete beam is poured and formed.
According to the construction method of the beam-slab connection structure of the prefabricated concrete structure, the anchor bars of the prefabricated floor slab can be anchored into the support concrete beam, so that the structural safety of the beam-slab connection structure of the prefabricated concrete structure is ensured; and the problem that the precast floor slab is difficult to hoist due to the interference of the anchor bars of the precast floor slab and the reinforcement cage of the support concrete can be avoided when the precast floor slab is hoisted.
The invention has the beneficial effects that: the anchor bars of the prefabricated floor slab can be anchored into the support concrete beam, so that the structural safety of the beam-slab connection structure of the fabricated concrete structure is ensured; and the problem that the precast floor slab is difficult to hoist due to the interference of the anchor bars of the precast floor slab and the reinforcement cage of the support concrete can be avoided when the precast floor slab is hoisted.
Drawings
Fig. 1 is a partial structural view of a beam-slab joint construction of a fabricated concrete structure according to the present invention.
Fig. 2 is a schematic view showing a structure of a reinforcement cage of the present invention for a support concrete beam.
Fig. 3 is a structural view of a precast portion of the support concrete beam of the present invention.
Fig. 4 is a partial structural view of an embodiment of a beam-slab connection construction of a fabricated concrete structure according to the present invention.
Fig. 5 is a partial structural view illustrating another embodiment of a beam-slab connection structure of a prefabricated concrete structure according to the present invention during construction.
In the figure:
the beam comprises a support concrete beam 1, a prefabricated part 1.0, a reinforcement cage 1.1, a main reinforcement cage 1.11, a beam top reinforcement cage 1.12, an anchor bar accommodating port 1.2, a beam longitudinal bar 1.3 and a beam stirrup 1.4;
the prefabricated floor 2, the prefabricated floor reinforcing mesh 2.1, the anchor bars 2.2 and the bending sections 2.3;
casting a laminated floor slab 3 in situ;
a temporary support 4;
a beam formwork 5.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention are clearly explained and illustrated below with reference to the accompanying drawings, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below by referring to the drawings are exemplary only for explaining the present scheme, and are not construed as limiting the scheme of the present invention.
These and other aspects of embodiments of the invention will be apparent with reference to the following description and attached drawings. In the description and drawings, particular embodiments of the invention have been disclosed in detail as being indicative of some of the ways in which the principles of the embodiments of the invention may be practiced, but it is understood that the scope of the embodiments of the invention is not limited thereby. On the contrary, the embodiments of the invention include all changes, modifications and equivalents coming within the spirit and terms of the claims appended hereto.
In the description of the present invention, it is to be understood that the terms "thickness", "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", "circumferential", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., and "several" means one or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The first embodiment is as follows: as shown in fig. 1 and 2, a beam-slab connection structure of an assembly type concrete structure includes a support concrete beam 1, a precast floor slab 2, and a cast-in-place laminated floor slab 3. A reinforcement cage 1.1 is arranged in the support concrete beam. The prefabricated floor slab is internally provided with a prefabricated floor slab reinforcing mesh 2.1. At least part of the reinforcement in the pre-cast floor slab reinforcement mat extends outside the pre-cast floor slab and forms anchor bars 2.2 on the outside of the pre-cast floor slab, in this embodiment the pre-cast floor slab reinforcement mat comprises a plurality of longitudinal floor slab ribs distributed side by side, each longitudinal floor slab rib extending outside the pre-cast floor slab and forming anchor bars on the outside of the pre-cast floor slab. The top of steel reinforcement cage is equipped with the anchor bar that is used for holding the anchor bar and holds mouth 1.2 to make the precast floor in the in-process that top-down hoist and mount were taken one's place, the anchor bar can top-down enter into the anchor bar and hold in the mouth, and the anchor bar can not take place to interfere with the steel reinforcement cage. The anchor bar is located anchor bar holding opening. The cast-in-place laminated floor slab is a cast-in-place laminated floor slab which is cast in place, the cast-in-place laminated floor slab is positioned above the prefabricated floor slab, and the cast-in-place laminated floor slab, the prefabricated floor slab and the support concrete beam are combined into a whole. After the cast-in-place laminated floor slab, the prefabricated floor slab and the support concrete beam are combined into a whole, the anchor bars are anchored into the support concrete beam.
In the process of hoisting the precast floor slab and hoisting the precast floor slab in place from top to bottom, the anchor bars enter the anchor bar accommodating openings from top to bottom, the anchor bars cannot interfere with the reinforcement cage, and the anchor bars are positioned in the anchor bar accommodating openings after the precast floor slab is hoisted in place; after the cast-in-place laminated floor slab, the prefabricated floor slab and the support concrete beam are combined into a whole, the anchor bars are anchored into the support concrete beam; therefore, the anchor bars of the prefabricated floor slab can be anchored into the support concrete beam, so that the structural safety of the beam-slab connection structure of the fabricated concrete structure is ensured; and the problem that the precast floor slab is difficult to hoist due to the interference of the anchor bars of the precast floor slab and the reinforcement cage of the support concrete can be avoided when the precast floor slab is hoisted.
In this embodiment, as shown in fig. 2, the reinforcement cage is composed of a plurality of beam longitudinal reinforcements 1.3 and beam stirrups 1.4.
Further, as shown in fig. 1, the reinforcement cage is composed of a plurality of beam longitudinal bars and beam stirrups, and the height of the beam longitudinal bar at the highest position in the beam longitudinal bars is higher than the height of the anchor bars.
Further, the dimension of the anchor bar accommodating port in the width direction of the support concrete beam should be greater than or equal to 60 mm.
In the width direction of the support concrete beam, the distance that the anchor bars extend into the support concrete beam is more than or equal to 7.5 times of the diameter of the anchor bars. In the embodiment, when the anchor bars are ribbed steel bars, the distance that the anchor bars extend into the support concrete beam is more than or equal to 7.5 times of the diameter of the anchor bars in the width direction of the support concrete beam; when the anchor bars are smooth round steel bars, the distance that the anchor bars extend into the support concrete beam is more than or equal to 9 times of the diameter of the anchor bars in the width direction of the support concrete beam.
Further, the distance between the center line of the beam longitudinal bar located at the highest position in the beam longitudinal bars 1.3 of the reinforcement cage and the top surface of the cast-in-place laminated floor slab 3 is L, L = c + d + R, wherein c is the thickness of the beam concrete protective layer, the thickness of the beam concrete protective layer is greater than or equal to 20 mm, and in this embodiment, the thickness of the concrete protective layer is 20 mm; d is the diameter of the stirrup; and R is the radius of the beam longitudinal rib.
Further, as shown in fig. 1, the end of the anchor bar 2.2 is provided with a bent section 2.3 formed by bending. The angle between the bending section and the anchor bar is 0-90 degrees, specifically, the angle between the bending section and the anchor bar is 45 degrees, and the length of the bending section is more than or equal to 5 times of the diameter of the anchor bar. Therefore, the length of the anchor bars anchored into the support concrete beam can be effectively increased, and the structural safety of the beam-slab connection structure of the fabricated concrete structure is further improved; and the length of the anchor bars extending into the support concrete beam in the width direction can not be increased, namely the width of the support concrete beam is not required to be increased.
As shown in fig. 1, in the present embodiment, the X-axis direction is the width direction of the support concrete beam, and the Y-axis direction is the height direction of the support concrete beam.
In one embodiment of this embodiment, as shown in fig. 3 and 4, the support concrete beam 1 includes a precast portion 1.0 and a cast-in-place portion. The reinforcement cage 1.1 is the font of falling T, and it includes main reinforcement cage 1.11 and is located the roof beam top reinforcement cage 1.12 of main reinforcement cage top. The main reinforcement cage is pre-buried in the prefabricated part. The beam top reinforcement cage is located above the prefabricated part. The notches on two sides of the reinforcement cage on the top of the beam form the anchor bar containing opening 1.2. The cast-in-place part of the support concrete beam and the cast-in-place laminated floor slab are cast together. And after the cast-in-place part of the support concrete beam is formed by pouring, the anchor bars are anchored into the support concrete beam. Therefore, the anchor bars of the prefabricated floor slab can be anchored into the support concrete beam, so that the structural safety of the beam-slab connection structure of the fabricated concrete structure is ensured; and the problem that the precast floor slab is difficult to hoist due to the interference of the anchor bars of the precast floor slab and the reinforcement cage of the support concrete can be avoided when the precast floor slab is hoisted.
In another embodiment of this embodiment, as shown in fig. 2 and 5, the support concrete beam 1 is a cast-in-place beam. The reinforcement cage 1.1 is the font of falling T, and it includes main reinforcement cage 1.11 and is located the roof beam top reinforcement cage 1.12 of main reinforcement cage top. The notches on two sides of the reinforcement cage on the top of the beam form the anchor bar containing opening 1.2. The support concrete beam and the cast-in-place superposed layer floor slab are poured together. And after the support concrete beam is poured, the anchor bars are anchored into the support concrete beam. Therefore, the anchor bars of the prefabricated floor slab can be anchored into the support concrete beam, so that the structural safety of the beam-slab connection structure of the fabricated concrete structure is ensured; and the problem that the precast floor slab is difficult to hoist due to the interference of the anchor bars of the precast floor slab and the reinforcement cage of the support concrete can be avoided when the precast floor slab is hoisted.
In this embodiment, the reinforcement cage is in an inverted T shape, specifically, the cross section of the reinforcement cage is in an inverted T shape.
In this embodiment, the support concrete beam that beam slab joint construction of prefabricated concrete structure adopted calculates according to the cross-section of the inverted-T steel reinforcement cage in the design process, confirms width, height and the reinforcing bar size and the model that the steel reinforcement cage used of support concrete beam.
The second concrete implementation: as shown in fig. 4, a concrete structure of a beam-slab connection structure of a prefabricated concrete structure in the present embodiment refers to the first embodiment. The construction method of the beam-slab connection structure of the fabricated concrete structure sequentially comprises the following steps of:
firstly, mounting a temporary support 4;
secondly, hoisting the prefabricated part of the support concrete beam in place, and supporting the prefabricated part through temporary support;
thirdly, hoisting the prefabricated floor slab 2, hoisting the prefabricated floor slab from top to bottom in place, and supporting the prefabricated floor slab through temporary supports; in the process of hoisting the prefabricated floor slab from top to bottom to be in place, the anchor bars 2.2 enter the anchor bar accommodating openings 1.2 from top to bottom, and the anchor bars do not interfere with the reinforcement cages; after the prefabricated floor slab is hoisted in place, the anchor bars are positioned in the anchor bar accommodating openings;
and fourthly, constructing a cast-in-place part of the cast-in-place laminated floor slab and the support concrete beam, binding a plate face reinforcing mesh above the precast floor slab, then casting the cast-in-place part of the support concrete beam and the cast-in-place laminated floor slab together, and after casting the cast-in-place part of the support concrete beam, anchoring the anchor bars into the support concrete beam. According to the construction method of the beam-slab connection structure of the prefabricated concrete structure, the anchor bars of the prefabricated floor slab can be anchored into the support concrete beam, so that the structural safety of the beam-slab connection structure of the prefabricated concrete structure is ensured; and the problem that the precast floor slab is difficult to hoist due to the interference of the anchor bars of the precast floor slab and the reinforcement cage of the support concrete can be avoided when the precast floor slab is hoisted.
The concrete implementation is three: as shown in fig. 5, a concrete structure of a beam-slab connection structure of a prefabricated concrete structure in the present embodiment refers to the first embodiment. The construction method of the beam-slab connection structure of the fabricated concrete structure sequentially comprises the following steps of:
firstly, mounting a temporary support 4 and a beam template 5;
secondly, binding a reinforcement cage 1.1 of the support concrete beam in the beam template, or hoisting a prefabricated reinforcement cage into the beam template;
thirdly, hoisting the prefabricated floor slab 2, hoisting the prefabricated floor slab from top to bottom in place, and supporting the prefabricated floor slab through temporary supports; in the process of hoisting the prefabricated floor slab from top to bottom to be in place, the anchor bars 2.2 enter the anchor bar accommodating openings 1.2 from top to bottom, and the anchor bars do not interfere with the reinforcement cages; after the prefabricated floor slab is hoisted in place, the anchor bars are positioned in the anchor bar accommodating openings;
and fourthly, constructing the cast-in-place laminated floor slab and the support concrete beam, binding a plate face reinforcing mesh above the prefabricated floor slab, then pouring the support concrete beam and the cast-in-place laminated floor slab together to form the support concrete beam, and anchoring the anchor bars into the support concrete beam after the support concrete beam is poured. According to the construction method of the beam-slab connection structure of the prefabricated concrete structure, the anchor bars of the prefabricated floor slab can be anchored into the support concrete beam, so that the structural safety of the beam-slab connection structure of the prefabricated concrete structure is ensured; and the problem that the precast floor slab is difficult to hoist due to the interference of the anchor bars of the precast floor slab and the reinforcement cage of the support concrete can be avoided when the precast floor slab is hoisted.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, alterations and equivalents of the above embodiments according to the technical spirit of the present invention are still within the protection scope of the technical solution of the present invention.
Claims (7)
1. A beam-slab connection structure of an assembly type concrete structure comprises a support concrete beam, a prefabricated floor slab and a cast-in-place laminated floor slab, wherein a reinforcement cage is arranged in the support concrete beam, and a prefabricated floor slab reinforcement mesh is arranged in the prefabricated floor slab; the top of the reinforcement cage is provided with an anchor bar accommodating port for accommodating an anchor bar, so that the anchor bar can enter the anchor bar accommodating port from top to bottom in the process of hoisting the prefabricated floor slab from top to bottom in place, and the anchor bar cannot interfere with the reinforcement cage; the anchor bars are positioned in the anchor bar accommodating openings; the cast-in-place laminated floor slab is a cast-in-place laminated floor slab which is cast in place, the cast-in-place laminated floor slab is positioned above the prefabricated floor slab, and the cast-in-place laminated floor slab, the prefabricated floor slab and the support concrete beam are combined into a whole;
the steel reinforcement cage is the font of falling T, and it includes main steel reinforcement cage and is located the roof beam top steel reinforcement cage of main steel reinforcement cage top, and the breach that is located roof beam top steel reinforcement cage both sides constitutes the anchor bar hold the mouth, support concrete beam pours with cast-in-place coincide layer floor together and forms, after support concrete beam pours and forms, the anchor bar anchors in the support concrete beam.
2. The beam-slab connection structure of an assembly type concrete structure according to claim 1, wherein said reinforcement cage is composed of a plurality of beam longitudinal bars and beam stirrups, and a height of a beam longitudinal bar located at a highest position among said beam longitudinal bars is higher than a height of an anchor bar.
3. The beam-slab connection structure of prefabricated concrete structure as claimed in claim 1, wherein said anchor bars are provided at their ends with bent sections formed by bending.
4. The beam-slab connection structure of prefabricated concrete structure as claimed in claim 3, wherein the angle between said bent section and said anchor bar is 0-90 degrees, and the length of said bent section is 5 times or more the diameter of said anchor bar.
5. The beam-slab connection structure of an assembled concrete structure according to claim 1, wherein the anchor bars are protruded into the support concrete beam by a distance equal to or greater than 7.5 times the diameter of the anchor bars in the width direction of the support concrete beam.
6. The beam-slab connection structure of an assembly type concrete structure according to claim 1, wherein the reinforcement cage is composed of a plurality of longitudinal beam ribs and beam stirrups, a distance between a center line of a longitudinal beam rib located at the highest position among the longitudinal beam ribs and the top surface of the cast-in-place laminated floor slab is L, L = c + d + R, wherein c is a beam concrete protective layer thickness, and the beam concrete protective layer thickness is 20 mm or more; d is the diameter of the stirrup; and R is the radius of the beam longitudinal rib.
7. A method of constructing a beam-slab joint structure of an assembled concrete structure according to claim 1, comprising the steps of, in order:
firstly, mounting a temporary support and a beam template;
secondly, binding a reinforcement cage of the support concrete beam in the beam template, or hoisting a prefabricated reinforcement cage into the beam template;
thirdly, hoisting the prefabricated floor slab from top to bottom in place, and supporting the prefabricated floor slab through temporary supports; in the process of hoisting the prefabricated floor slab from top to bottom to be in place, the anchor bars enter the anchor bar accommodating openings from top to bottom, and the anchor bars do not interfere with the reinforcement cage; after the prefabricated floor slab is hoisted in place, the anchor bars are positioned in the anchor bar accommodating openings;
and fourthly, constructing the cast-in-place laminated floor slab and the support concrete beam, pouring the support concrete beam and the cast-in-place laminated floor slab together to form the support concrete beam, and anchoring the anchor bars into the support concrete beam after the support concrete beam is poured and formed.
Priority Applications (2)
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| CN202110191821.8A CN113027024B (en) | 2019-12-23 | 2019-12-23 | Prefabricated concrete structure floor system structure and construction method |
| CN201911342389.7A CN111305437B (en) | 2019-12-23 | 2019-12-23 | Beam-slab connection structure of prefabricated concrete structure and construction method thereof |
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| CN112411560A (en) * | 2020-11-02 | 2021-02-26 | 中交第四航务工程局有限公司 | Step-by-step rapid construction method for beam plate structure of support body system in deep and large foundation pit |
| CN112411883A (en) * | 2020-11-26 | 2021-02-26 | 安徽马钢比亚西钢筋焊网有限公司 | Cast-in-place floor hogging moment rib variable-spacing steel bar welding net and construction method |
| CN114016649A (en) * | 2021-11-25 | 2022-02-08 | 中冶赛迪工程技术股份有限公司 | Connection structure of assembled composite floor slab and cast-in-place beam |
| CN115262835B (en) * | 2022-09-06 | 2023-08-01 | 中机中联工程有限公司 | Construction method and connection structure of short-rib-outlet truss reinforced concrete composite slab |
| CN115419176A (en) * | 2022-09-20 | 2022-12-02 | 中铁成都规划设计院有限责任公司 | Assembled beam slab node |
| CN115478646A (en) * | 2022-10-12 | 2022-12-16 | 中建八局第二建设有限公司 | Construction method and structure of precast concrete composite floor slab |
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| ES2311309B1 (en) * | 2005-01-12 | 2009-12-03 | Juan Gregorio Lombardo Maldonado | SEMI-BEAM JACENA DE HORMIGON FOR SUPPORT OF MIXED FORGINGS. |
| US8230657B2 (en) * | 2008-01-24 | 2012-07-31 | Nucor Corporation | Composite joist floor system |
| CN101586366B (en) * | 2008-05-21 | 2011-04-20 | 万科企业股份有限公司 | Connecting structure and construction method of precast concrete plates and beams, and building comprising same |
| CN103758282A (en) * | 2014-01-26 | 2014-04-30 | 湖北弘毅建设有限公司 | Lattice type steel reinforced concrete superposed beam |
| CN104110097B (en) * | 2014-06-30 | 2016-04-06 | 湖北弘毅建设有限公司 | A kind of end enhancement mode reinforcing bar concrete composite beam |
| CN107355006A (en) * | 2017-09-13 | 2017-11-17 | 长沙远大住宅工业集团股份有限公司 | The connecting node and its construction method of composite beam and superposed member |
| CN110318490B (en) * | 2019-07-18 | 2021-03-02 | 杭州建工集团有限责任公司 | Construction method for connecting laminated slab and secondary beam and node connecting structure |
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