CN112982773A - Construction method of prefabricated reinforced concrete composite slab with extending reinforcing steel bars - Google Patents
Construction method of prefabricated reinforced concrete composite slab with extending reinforcing steel bars Download PDFInfo
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- CN112982773A CN112982773A CN202110213660.8A CN202110213660A CN112982773A CN 112982773 A CN112982773 A CN 112982773A CN 202110213660 A CN202110213660 A CN 202110213660A CN 112982773 A CN112982773 A CN 112982773A
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- reinforced concrete
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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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Abstract
The invention discloses a construction method of a prefabricated reinforced concrete composite slab with extended reinforcing steel bars, which comprises the following steps: s100, preparing a prefabricated component, wherein the prefabricated component is a prefabricated reinforced concrete composite slab with protruding reinforcing steel bars at two ends; s200, bending the extending reinforcing steel bars, and bending the extending reinforcing steel bars at one end of the prefabricated reinforced concrete composite slab towards the direction of the bottom plate before hoisting; s300, placing a prefabricated component, and hoisting the prefabricated reinforced concrete composite slab with one end extending out of the bent reinforcing steel bar to a target installation position; s400, restoring the bent extending reinforcing steel bars, and returning the bent extending reinforcing steel bars at one end of the prefabricated reinforced concrete composite slab upwards; s500, pouring, namely pouring concrete at the top of the prefabricated reinforced concrete composite slab to form an integral component, wherein the construction method of the prefabricated reinforced concrete composite slab with the extending reinforcing steel bars is high in construction efficiency and good in finished product quality.
Description
Technical Field
The invention relates to a building construction method, in particular to a construction method of a prefabricated reinforced concrete composite slab with extended reinforcing steel bars.
Background
In the field of constructional engineering, the prefabricated reinforced concrete composite slab with the extending reinforcing steel bars collides or interferes with the longitudinal reinforcing steel bars at the tops of the two side beams in the construction process. The conventional construction method comprises the following three steps:
the first method is to unbundle the longitudinal bar at the top of the beam (the bar can be inserted later, the bar can be placed at the bottom of the beam in advance, or the bar can be placed at the opposite side of the composite slab of the beam in advance), and after the prefabricated slab is placed, the longitudinal bar at the top of the beam is returned and then bound. No matter the top longitudinal bar of the beam is penetrated, the bottom of the beam is pre-placed and lifted, or the beam is pre-placed on the opposite side of the beam and returned, the construction difficulty is greatly increased, and the field construction efficiency is seriously reduced.
The second method is to pre-bind the longitudinal bars at the top of the beam, when the precast slabs are installed, the steel bars extending out of the slabs collide or interfere with the longitudinal bars at the top of the beam, a crowbar is adopted to forcibly move and avoid the longitudinal bars at the top of the beam on site, and after the precast slabs are installed, the longitudinal bars at the top of the beam are reset and secondarily bound. The method belongs to field rough construction, and the sensory effect and the finished product quality of the on-site reinforcing steel bar are difficult to ensure.
And the third method comprises the steps of bending the extending steel bars of the prefabricated plates towards the top of the prefabricated plates before hoisting, returning the extending steel bars downwards after the prefabricated plates are installed, wherein the steel bars cannot be collided or interfered with the longitudinal bars at the top of the beam when returning downwards, forcibly moving the longitudinal bars at the top of the beam away for avoiding by adopting a crowbar on site, and returning and secondarily binding the longitudinal bars at the top of the beam after the extending steel bars of the prefabricated plates are returned downwards. The method can not avoid field rough construction, and the sensory effect and the finished product quality of the on-site reinforcing steel bar can not be ensured.
Therefore, the technical personnel in the field are dedicated to develop a construction method of the prefabricated reinforced concrete composite slab with the extending steel bars, which has high construction efficiency and good construction finished product quality.
Disclosure of Invention
In view of the above defects in the prior art, the technical problem to be solved by the present invention is to provide a construction method for a prefabricated reinforced concrete composite slab with protruding steel bars, which is used for solving the problems in the prior art that the work efficiency of site construction is reduced and the sensory effect and the quality of finished products are difficult to ensure because the protruding steel bars of the prefabricated slab collide or interfere with the longitudinal bars at the top of the beam during construction and installation.
In order to achieve the purpose, the invention provides a construction method of a prefabricated reinforced concrete composite slab with extended steel bars, which comprises the following steps:
s100, preparing a prefabricated component, wherein the prefabricated component is a prefabricated reinforced concrete composite slab with protruding reinforcing steel bars at two ends.
S200, bending the extending reinforcing steel bars, and bending the extending reinforcing steel bars at one end of the prefabricated reinforced concrete composite slab towards the direction of the bottom plate before hoisting.
S300, placing a prefabricated component, and hoisting the prefabricated reinforced concrete composite slab with one end extending out of the bent reinforcing steel bars to a target installation position.
S400, restoring the bent extending reinforcing steel bars, and returning the bent extending reinforcing steel bars at one end of the prefabricated reinforced concrete composite slab upwards.
And S500, pouring, wherein concrete is poured on the top of the prefabricated reinforced concrete composite slab to form an integral component.
Further, the precast reinforced concrete composite slab is an integral member formed by casting concrete on the top of the precast reinforced concrete composite slab after site in a factory or on site in advance, and the integral member includes, but is not limited to, a truss reinforced concrete composite slab and a prestressed reinforced concrete composite slab.
Further, the step S200 further includes the steps of: s210, placing a temporary cushion block, wherein the temporary cushion block is placed below the extending steel bar to be bent; s220, the steel bar bending tool bends the extending steel bars and is a sleeve, the sleeve is sleeved into the extending steel bars, and the extending steel bars are bent towards the bottom of the plate.
Further, in the step S200, the bent protruding reinforcing steel bars are all or part of the protruding reinforcing steel bars.
Further, in the step S200, the bending angle of the extended steel bar is not greater than 85 degrees, and the distance between the bending point of the extended steel bar and the root of the extended steel bar is not less than 4 mm.
Further, in the step S300, the prefabricated reinforced concrete composite slab is hoisted between two support beams for installation and fixation, and the support beams are cast-in-place beams or prefabricated composite beams.
Furthermore, one end of the straight extending steel bar of the prefabricated reinforced concrete composite slab inclines downwards by less than 15 degrees and is obliquely inserted into the support beam, the prefabricated reinforced concrete composite slab is rotated around an insertion point, and one end of the bent extending steel bar of the prefabricated reinforced concrete composite slab is installed to a target installation position.
Further, in the step S400, a steel bar homing tool is placed downwards to the middle inside the support beam, the steel bar homing tool is sleeved on the bent extended steel bar and then pulled upwards to home, and the steel bar homing tool is taken out from the middle of the top of the support beam.
The invention has the beneficial effects that: in the process of construction, hoisting and installation of the laminated slab, the extended reinforcing steel bars of the slab are bent downwards firstly, and then the slab can be prevented from colliding or interfering with the beam top longitudinal steel bars through a construction method of resetting a specific tool, so that the post-disturbance of beam reinforcing steel bar binding according to normal procedures is greatly avoided, the field work efficiency is improved, and the construction method has wide adaptability.
Drawings
Fig. 1 is a schematic structural view of a prefabricated reinforced concrete laminated structure with protruding reinforcing bars according to an embodiment of the present invention.
FIG. 2 is a diagram of a construction step S210 according to an embodiment of the present invention.
FIG. 3 is a diagram illustrating a construction step S220 according to an embodiment of the present invention.
FIG. 4 is a diagram of a construction step S300 according to an embodiment of the present invention.
FIG. 5 is a diagram of a construction step S300 according to an embodiment of the present invention.
FIG. 6 is a diagram of a construction step S400 according to an embodiment of the present invention.
FIG. 7 is a diagram of a construction step S400 according to an embodiment of the present invention.
FIG. 8 is a diagram of a construction step S500 according to an embodiment of the present invention.
FIG. 9 is a diagram of a construction step S500 according to an embodiment of the present invention.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples, wherein the terms "upper", "lower", "left", "right", "inner", "outer", and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is for convenience and simplicity of description, and does not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular manner, and thus should not be construed as limiting the present invention. The terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1 to 9, the present invention provides a construction method of a prefabricated reinforced concrete composite slab with protruding reinforcing bars, comprising the steps of:
referring to fig. 1, S100 prepares a prefabricated part, which is a prefabricated reinforced concrete composite slab having protruding reinforcing bars at both ends. The prefabricated reinforced concrete composite slab is an integral member formed by post-pouring concrete on the top of the slab of the prefabricated reinforced concrete composite slab in the field, and the integral member comprises but is not limited to truss reinforced concrete composite slabs and prestressed reinforced concrete composite slabs.
Referring to fig. 2 to 3, in S200, the protruding reinforcing steel bars are bent, and the protruding reinforcing steel bars at one end of the prefabricated reinforced concrete composite slab are bent toward the bottom plate before hoisting. Step S200 further includes the steps of: s210, placing a temporary cushion block, wherein the temporary cushion block is placed below the extending steel bar to be bent; s220, the steel bar bending tool bends the extending steel bars, wherein the bent extending steel bars are all or part of the extending steel bars. The steel bar bending tool is a sleeve, the sleeve is sleeved into the extending steel bar, and the extending steel bar is bent towards the bottom of the plate.
Referring to fig. 4 to 5, in S300, the prefabricated component is placed, and the prefabricated reinforced concrete composite slab with one end extending out of the bent reinforcing steel bar is hoisted to the target installation position.
Referring to fig. 6 to 7, the bent protruding reinforcing steel bars are restored in S400, and the bent protruding reinforcing steel bars at one end of the prefabricated reinforced concrete composite slab are returned upwards.
As shown in fig. 8 to 9, in step S500, concrete is poured on top of the prefabricated reinforced concrete composite slab to form an integral member.
The detailed construction method comprises the following steps:
referring to fig. 1, the prefabricated member is a prefabricated reinforced concrete composite slab with protruding reinforcing bars, and includes prefabricated reinforced concrete 1 of the prefabricated reinforced concrete composite slab and prefabricated protruding reinforcing bars 2 of the reinforced concrete composite slab. In the embodiment, the thickness of the prefabricated plate of the prefabricated reinforced concrete composite slab is 60mm, and the span of the prefabricated reinforced concrete composite slab is +10 mm; the diameter of the extending steel bar of the prefabricated extending steel bar part 2 of the prefabricated reinforced concrete composite slab is 8mm, and the extending length of the extending steel bar part is 95 mm. The sectional area loss caused by one bending and one returning of the extending steel bars is considered in the design stage before bending.
Referring to fig. 2, a temporary cushion block 3 is placed at the root of the lower side of the extending steel bar to prevent the bottom concrete from being damaged due to local compression in the bending process of the steel bar; and placing a reinforcing steel bar bending tool 4. In the embodiment, the temporary cushion block 3 adopts a reinforcing steel bar with the length of 400mm and the diameter of 8 mm; the steel bar bending tool 4 is a cold-bending round steel pipe 26.8x 3.0.
Referring to fig. 3, the steel bar bending tool 4 is used to bend the prefabricated slab extending from the steel bar toward the bottom of the slab. In the example, the bending angle of the prefabricated slab extending out of the steel bar is 80 degrees, and the distance between the bending point and the root of the extending steel bar is 6 mm.
Referring to fig. 4, one end of the prefabricated reinforced concrete composite slab is obliquely inserted into one side support beam 5 at a small angle, i.e., less than 15 degrees, and the prefabricated reinforced concrete composite slab is inserted into the support beam 5 to a depth of about 5 mm. The width of the beams on both sides of the laminated slab is 200mm in the example. The support beam 5 is a cast-in-place beam or a prefabricated superposed beam, and a beam stirrup 7 is arranged outside the support beam 5.
Referring to fig. 5, after one end of the prefabricated reinforced concrete composite slab is inserted into the beam, the prefabricated reinforced concrete composite slab is rotated around the insertion point, and the other end of the prefabricated reinforced concrete composite slab is lightly placed to a target installation completion position.
Referring to fig. 6, a reinforcing bar homing tool 8 is placed downward from the top middle portion of the support beam 5.
Referring to fig. 7, the bent protruding reinforcing bars are returned upward using the reinforcing bar returning tool 8. In this example, the reinforcing bar homing tool 8 may be a lever-type, fishing tackle-type, or wrench-type lifting tool.
Referring to fig. 8, after the prefabricated reinforced concrete is folded and extends out of the steel bars to return, the steel bar returning tool is taken out from the middle of the beam top.
And as shown in the combined figure 9, concrete is poured behind the top of the precast slab to form a post-cast reinforced concrete layer 9, so that an integral component is formed, and the construction of the precast reinforced concrete composite slab is finished.
In the processes of construction, hoisting and installation of the laminated slab, the extending steel bars of the slab are bent downwards firstly, so that the condition that the extending steel bars of the slab do not collide or interfere with the beam top longitudinal bars in the process of placing the prefabricated reinforced concrete laminated slab is ensured. And when the precast slabs are placed at the target installation position, extending the bent precast slabs out of the steel bars from the middle part of the support beam 5 by using a steel bar homing tool to upwards home so as to ensure that the extending steel bars 2 of the steel bars do not collide or interfere with the beam top longitudinal bars 6 in the steel bar homing process. The construction method greatly reduces disturbance of the installation of the laminated slab to the beam steel bar, can avoid rough construction, improves the field construction quality and the construction efficiency, and has wide adaptability.
The foregoing detailed description of the preferred embodiments of the invention has been presented. It should be understood that numerous modifications and variations could be devised by those skilled in the art in light of the present teachings without departing from the inventive concepts. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.
Claims (8)
1. A construction method of a prefabricated reinforced concrete composite slab with extended steel bars is characterized by comprising the following steps:
s100, preparing a prefabricated component, wherein the prefabricated component is a prefabricated reinforced concrete composite slab with protruding reinforcing steel bars at two ends;
s200, bending the extending reinforcing steel bars, and bending the extending reinforcing steel bars at one end of the prefabricated reinforced concrete composite slab towards the direction of the bottom plate before hoisting;
s300, placing a prefabricated component, and hoisting the prefabricated reinforced concrete composite slab with one end extending out of the bent reinforcing steel bar to a target installation position;
s400, restoring the bent extending reinforcing steel bars, and returning the bent extending reinforcing steel bars at one end of the prefabricated reinforced concrete composite slab upwards;
and S500, pouring, wherein concrete is poured on the top of the prefabricated reinforced concrete composite slab to form an integral component.
2. The construction method of the prefabricated reinforced concrete composite slab with the extended steel bars as claimed in claim 1, is characterized in that: the prefabricated reinforced concrete composite slab is an integral member formed by casting concrete on the top of the prefabricated reinforced concrete composite slab in situ in advance in a factory or on the site, and the integral member comprises but is not limited to a truss reinforced concrete composite slab and a prestressed reinforced concrete composite slab.
3. The construction method of the prefabricated reinforced concrete composite slab with the extended steel bars as claimed in claim 1, is characterized in that: the step S200 further includes the steps of:
s210, placing a temporary cushion block, wherein the temporary cushion block is placed below the extending steel bar to be bent;
s220, the steel bar bending tool bends the extending steel bars and is a sleeve, the sleeve is sleeved into the extending steel bars, and the extending steel bars are bent towards the bottom of the plate.
4. The construction method of the prefabricated reinforced concrete composite slab with the extended steel bars as claimed in claim 1, is characterized in that: in the step S200, the bent protruding reinforcing steel bars are all or part of the protruding reinforcing steel bars.
5. The construction method of the prefabricated reinforced concrete composite slab with the extended steel bars as claimed in claim 4, characterized in that: in the step S200, the bending angle of the extended steel bar is not greater than 85 degrees, and the distance between the bending point of the extended steel bar and the root of the extended steel bar is not less than 4 mm.
6. The construction method of the prefabricated reinforced concrete composite slab with the extended steel bars as claimed in claim 1, is characterized in that: in the step S300, the prefabricated reinforced concrete composite slab is hoisted to a position between two support beams for installation and fixation, and the support beams are cast-in-place beams or prefabricated composite beams.
7. The construction method of the prefabricated reinforced concrete composite slab with the extended steel bars as claimed in claim 6, characterized in that: one end of the prefabricated reinforced concrete composite slab, which is directly extended, of the steel bar is obliquely inserted into the support beam by inclining by less than 15 degrees, the prefabricated reinforced concrete composite slab is rotated around an insertion point, and one end of the prefabricated reinforced concrete composite slab, which is bent and extends out of the steel bar, is installed to a target installation position.
8. The construction method of the prefabricated reinforced concrete composite slab with the extended steel bars as claimed in claim 6, characterized in that: in the step S400, a steel bar homing tool is placed downward toward the middle inside the support beam, the steel bar homing tool is sleeved to the bent extended steel bar and then pulled upward to home, and the steel bar homing tool is taken out from the middle of the top of the support beam.
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| CN202110213660.8A CN112982773A (en) | 2021-02-26 | 2021-02-26 | Construction method of prefabricated reinforced concrete composite slab with extending reinforcing steel bars |
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| CN202110213660.8A CN112982773A (en) | 2021-02-26 | 2021-02-26 | Construction method of prefabricated reinforced concrete composite slab with extending reinforcing steel bars |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114075878A (en) * | 2021-11-16 | 2022-02-22 | 中交一公局集团有限公司 | Assembled superimposed sheet installation device |
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