Ribbed hollow floor concrete pouring construction method

Abstract

The application discloses a kind of dense rib hollow floor concrete pouring construction methods, comprising the following steps: setting the coordinate net of dense rib hollow floor on formwork;According to coordinate net, install bottom plate reinforcement and longitudinal, horizontal dense rib beam on formwork, and adopt fixed part to fix bottom plate reinforcement and dense rib beam on formwork;Vertical through hole is set in the center position of membrane shell, membrane shell is installed in the open web formed by longitudinal, horizontal dense rib beam, top reinforcement is installed in the top of membrane shell, and bottom plate reinforcement is connected with top reinforcement by connecting piece through vertical through hole;Concrete pouring: concrete pouring is carried out at least three times, first time is poured along the dense rib beam around membrane shell, pouring condition is observed through vertical through hole, second time is poured into vertical through hole, and third time is poured with concrete to fill the remaining space of dense rib beam and vertical through hole.The dense rib hollow floor concrete pouring construction method can limit membrane shell, avoid membrane shell moving, and also improve the compactness of concrete at the bottom of membrane shell.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of building construction, in particular to a concrete pouring construction method for a dense-rib hollow floor. BACKGROUND

[0002] At present, the cast-in-place concrete hollow floor has become a relatively popular floor structure form because it can not only reduce the weight of the floor, but also ensure the strength and stiffness of the floor. However, in the construction process of the cast-in-place concrete hollow floor, the impact force generated during the pouring of the concrete can cause the hollow membrane shell to drift in the horizontal direction. At the same time, the non-uniformity of the concrete density and air pressure at the bottom of the hollow membrane shell during the pouring of the concrete can easily cause the membrane shell to float upward in the vertical direction, thereby causing the membrane shell to deviate and failing to meet the size requirements of the design dense-rib beam and plate. In addition, during the pouring process, the vibration rod cannot be vibrated in place due to the small pouring space at the bottom of the membrane shell, which can reduce the compactness of the entire bottom plate, thereby causing problems in the structure quality, and also causing the risk of water leakage and affecting the appearance of the structure.

[0003] Therefore, it is necessary to design a concrete pouring construction method for a dense-rib hollow floor to solve the above problems. SUMMARY

[0004] The present application aims to provide a concrete pouring construction method for a dense-rib hollow floor which can limit the membrane shell and avoid the movement of the membrane shell, and also improve the compactness of the concrete at the bottom of the membrane shell.

[0005] To achieve the above-mentioned application purposes, the present application provides a concrete pouring construction method for a dense-rib hollow floor, comprising the following steps:

[0006] S1, positioning and setting out: setting a coordinate network of the dense-rib hollow floor on the formwork;

[0007] S2, installation of bottom plate reinforcement and dense-rib beams: installing the bottom plate reinforcement and the longitudinal and transverse dense-rib beams on the formwork according to the marked positions on the coordinate network, and fixing the bottom plate reinforcement and the dense-rib beams on the formwork by using fixing members;

[0008] S3, installation of membrane shell and top reinforcement: setting a vertical through hole at the center position of the membrane shell, installing the membrane shell in the hollow frame formed by the longitudinal and transverse dense-rib beams, installing the top reinforcement at the top of the membrane shell, and connecting the bottom plate reinforcement and the top reinforcement by using connecting members passing through the vertical through hole, so that the bottom plate reinforcement and the top reinforcement limit the membrane shell; at the same time, the top reinforcement is bound with the dense-rib beams;

[0009] S4, concrete pouring: the concrete pouring is performed at least three times;

[0010] First pouring: pouring concrete along the ribbed beam around the membrane shell and vibrating, observing the pouring of the concrete at the bottom of the membrane shell through the vertical through hole, and stopping pouring when floating slurry appears in the vertical through hole;

[0011] Second pouring: pouring a certain amount of concrete into the vertical through hole and vibrating;

[0012] Third pouring: filling the remaining space of the vertical through hole and the ribbed beam around the membrane shell with concrete and vibrating.

[0013] As a further improvement of the application, in step S2, the fixing member is a steel wire, and the formwork is provided with a plurality of mounting holes for the steel wire to pass through.

[0014] As a further improvement of the application, the bottom plate reinforcement and the ribbed beam are both fixed on the secondary beam of the formwork by steel wires.

[0015] As a further improvement of the application, the bottom plate reinforcement and the ribbed beam are also connected and fixed by steel wires.

[0016] As a further improvement of the application, in step S3, a first limiting pad is arranged between the bottom of the membrane shell and the bottom plate reinforcement.

[0017] As a further improvement of the application, in step S3, a second limiting pad is arranged between the top of the membrane shell and the top reinforcement.

[0018] As a further improvement of the application, in step S3, the connecting member is a steel wire rope.

[0019] As a further improvement of the application, in step S4, when the first pouring is performed, the appearance of floating slurry is that the slurry covers the bottom surface of the vertical through hole.

[0020] As a further improvement of the application, in step S4, when the second pouring is performed, the pouring amount of concrete is to make the height of the concrete in the vertical through hole higher than the height of the concrete around the membrane shell.

[0021] The beneficial effects of the application are:

[0022] 1. The present application can use the vertical through hole as an observation port to control the pouring process of concrete by observing the pulp situation in the vertical through hole, and ensure the compactness of the bottom concrete of the membrane shell, and can also use the vertical through hole as an anti-floating connection channel to connect the bottom plate reinforcement and the top reinforcement together by making the connecting piece pass through the vertical through hole to form a whole, so that the bottom plate reinforcement and the top reinforcement are respectively clamped on the bottom surface and the top surface of the membrane shell to limit the membrane shell and avoid the movement of the membrane shell during the concrete pouring process; in addition, since the vertical through hole is located in the center of the membrane shell, the connecting piece can better clamp the membrane shell between the bottom plate reinforcement and the top reinforcement after connecting the bottom plate reinforcement and the top reinforcement, thereby improving the limiting effect of the bottom plate reinforcement and the top reinforcement on the membrane shell.

[0023] 2. The present application can improve the anti-floating ability of the membrane shell by fixing the bottom plate reinforcement and the ribbed beam on the formwork and connecting the top reinforcement and the bottom plate reinforcement by the connecting piece.

[0024] 3. During the concrete pouring process, a certain height of concrete is poured around the membrane shell first, so that the concrete flows into the vertical through hole during vibration, thereby facilitating the judgment of the pouring condition of the bottom concrete by observing the pulp in the vertical through hole; then the concrete is poured in the vertical through hole, so that the poured concrete in the vertical through hole moves to the surrounding of the bottom of the membrane shell under vibration, thereby fully filling the bottom of the membrane shell and ensuring the compactness of the bottom concrete. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a concrete pouring construction plan view of a ribbed hollow floor.

[0026] Figure 2 It is a concrete pouring construction section view of a ribbed hollow floor.

[0027] Figure 3 It is a concrete distribution diagram of the bottom of the membrane shell when pouring concrete around the membrane shell.

[0028] Figure 4 It is a first concrete pouring diagram.

[0029] Figure 5 It is a second concrete pouring diagram.

[0030] Figure 6 It is a third concrete pouring diagram.

[0031] Figure 7 It is a fourth concrete pouring diagram.

[0032] REFERENCE NUMERALS

[0033] 10. Formwork; 11. Secondary beam; 20. Membrane shell; 21. Vertical through hole; 22. Steel wire rope; 23. First limit pad; 24. Second limit pad; 30. Bottom plate reinforcement; 40. Top reinforcement; 50. Multi-rib beam; 60. Vibrating rod; 70. Float slurry area. DETAILED DESCRIPTION

[0034] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0035] It should also be noted here that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the solutions of the present invention are shown in the drawings, while other details that are not closely related to the present invention are omitted.

[0036] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0037] like Figure 1 and Figure 2 As shown, the present invention provides a method for pouring concrete for a dense-ribbed hollow floor, comprising the following steps:

[0038] S1. Positioning and setting out: setting the coordinate grid of the dense-ribbed hollow floor on the template 10;

[0039] S2. Installation of the bottom plate reinforcement 30 and the multi-ribbed beams 50: Install the bottom plate reinforcement 30 and the longitudinal and transverse multi-ribbed beams on the template 10 according to the positions marked on the coordinate grid, and use fixing parts to fix the bottom plate reinforcement 30 and the multi-ribbed beams 50 on the template 10;

[0040] S3. Installation of the membrane shell 20 and the top steel bar 40: A vertical through hole 21 is provided at the center of the membrane shell 20 so as to use the vertical through hole 21 for anti-floating setting and to use the vertical through hole 21 as an observation port to observe the pouring of concrete; the membrane shell 20 is installed in the hollow formed by the longitudinal and transverse dense-ribbed beams, the top steel bar 40 is installed on the top of the membrane shell 20, and the bottom plate steel bar 30 is connected to the top steel bar 40 through the vertical through hole 21 by a connector, so that the bottom plate steel bar 30 and the top steel bar 40 form a limit for the membrane shell 20; at the same time, the top steel bar 40 is tied to the dense-ribbed beam 50;

[0041] S4. Concrete pouring: Concrete pouring shall be carried out in at least three times;

[0042] First pouring: pouring concrete along the ribbed beam 50 around the membrane shell 20 and vibrating, observing the pouring of the concrete at the bottom of the membrane shell 20 through the vertical through hole 21, and stopping pouring when floating slurry appears in the vertical through hole 21;

[0043] Second pouring: pouring a certain amount of concrete into the vertical through hole 21 and vibrating until no bubbles come out of the concrete;

[0044] Third pouring: filling the remaining space of the ribbed beam 50 around the membrane shell 20 and the vertical through hole 21 with concrete and vibrating.

[0045] Specifically, in step S1, the specific preparation process of the coordinate net is: performing line laying on the formwork 10 to pop out the approximate positions of the beam edge line of the ribbed beam 50 and the observation port.

[0046] Specifically, in step S2, the installation steps of the bottom plate reinforcement 30 and the ribbed beam 50 are: setting a plurality of pairs of installation holes on the formwork 10, threading a steel wire from one installation hole and passing around the secondary beam 11 of the formwork 10, and then threading out from the corresponding another installation hole for fixing the bottom plate reinforcement 30 and the secondary beam 11 of the formwork and the ribbed beam 50 and the secondary beam 11 of the formwork; installing the bottom plate reinforcement 30 and the longitudinal and transverse ribbed beams 50 on the formwork 10 according to the coordinate net, and fixing the bottom plate reinforcement 30 and the secondary beam 11 of the formwork and the ribbed beam 50 and the secondary beam 11 of the formwork by using the steel wire passing around the secondary beam 11 of the formwork 10. At the same time, the bottom plate reinforcement 30 and the ribbed beam 50 are also connected and fixed by using the steel wire.

[0047] Specifically, in step S3, before installing the membrane shell 20, a steel wire rope 22 passing around the bottom plate reinforcement 30 is reserved at the position corresponding to the vertical through hole 21, and when installing the membrane shell 20, the steel wire rope 22 passing around the bottom plate reinforcement 30 is threaded through the vertical through hole 21, and after the subsequent installation of the top reinforcement 40 is completed, the steel wire rope 22 is tied on the top reinforcement 40, so that the vertical through hole 21 is used as a channel to connect the bottom plate reinforcement 30 and the top reinforcement 40 corresponding to the bottom surface and the top surface of the membrane shell 20 respectively, and limit the membrane shell 20.

[0048] The bottom plate steel bars 30 are connected with the formwork 10 beam 11 and the ribbed beam 50 with the formwork 10 beam 11 by steel wires, and meanwhile the bottom plate steel bars 30 are connected with the top steel bars 40 by the steel wire rope 22, and the top steel bars 40 are tied with the ribbed beam 50, so that the top steel bars 40, the ribbed beam 50 and the bottom plate steel bars 30 form an integral structure, the membrane shell 20 is limited in all directions, the membrane shell 20 is limited in horizontal direction and vertical square by the connection of the ribbed beam 50 with the bottom plate steel bars 30 and the top steel bars 40, and the membrane shell 20 is further limited by the connection points of the vertical through holes 21, wherein, since the vertical through holes 21 are located at the center of the membrane shell 20, the corresponding bottom plate steel bars 30 and top steel bars 40 of the membrane shell 20 are tightly abutted on the surface of the membrane shell 20, compared with the connection of the bottom plate steel bars 30 and the top steel bars 40 along the side of the membrane shell 20 to limit the membrane shell 20, the construction process is reduced while better limiting effect is achieved, so that the membrane shell 20 is not displaced in construction, and the cross-sectional size of the ribbed beam 50 and the structural slab of the hollow floor is stable.

[0049] In addition, since the formwork 10 is fixed on the formwork support system, the connection of the bottom plate steel bars 30 with the formwork beam 11 and the ribbed beam 50 with the formwork beam 11 can improve the anti-floating capacity of the membrane shell 20 by the formwork support system.

[0050] Specifically, in step S3, the first limiting pad 23 is arranged between the bottom of the membrane shell 20 and the bottom plate steel bars 30, and the second limiting pad 24 is arranged between the top of the membrane shell 20 and the top steel bars 40. For example, the thickness of the first limiting pad 23 is 3mm, and four first limiting pads 23 are arranged at the four corners of the bottom of the membrane shell 20; the thickness of the second limiting pad 24 is 80mm, and four second limiting pads 24 are arranged at the four corners of the top of the membrane shell 20. The arrangement of the limiting pad facilitates the fine adjustment of the specific height of the concrete pouring in the vertical direction, and also increases the contact area of the membrane shell 20 and the steel bars to provide the limiting effect on the membrane shell 20.

[0051] Specifically, in step S4, when the first pouring is performed, the floating slurry condition is that the slurry covers the bottom surface of the vertical through hole 21, and when the concrete continues to be poured, the concrete tends to overflow upwards along the vertical through hole 21.

[0052] Specifically, in step S4, when the second pouring is performed, the pouring amount of the concrete is that the height of the concrete in the vertical through hole 21 is higher than the height of the concrete around the membrane shell 20.

[0053] For example, Figure 3As shown, after the concrete is poured around the membrane shell 20, the concrete flows to the middle of the bottom of the membrane shell 20, and under the blocking effect of the membrane shell 20, the bottom of the membrane shell 20 forms a floating slurry area 70 centered on the vertical through hole 21, that is, at this time, the compaction degree of the concrete at the bottom of the membrane shell 20 gradually decreases from the periphery of the membrane shell 20 to the middle of the membrane shell 20; when the floating slurry covers the bottom surface of the vertical through hole 21, it indicates that the preliminary pouring of the bottom of the membrane shell 20 is completed, and if the concrete continues to be poured around the membrane shell 20, the continuously poured concrete will not compact the floating slurry area 70, but will overflow upward along the vertical through hole 21, at this time, the floating slurry area 70 still exists at the bottom of the membrane shell 20, and the compaction degree of the concrete in the vertical through hole 21 is higher than that of the floating slurry area 70, and even if the concrete is poured downward from the vertical through hole 21 later, it is impossible to supplement the concrete to the floating slurry area 70, and at the same time, due to the fact that the vibrating device cannot vibrate the bottom of the membrane shell 20, there will be a region with low compaction at the bottom of the membrane shell 20 due to the floating slurry effect.

[0054] The present application pours a certain height of concrete around the membrane shell 20 first, so that the concrete flows to the vertical through hole 21 when vibrating, and stops pouring when the floating slurry is observed in the vertical through hole 21; then pours concrete from the vertical through hole 21, and makes the height of the concrete in the vertical through hole 21 higher than the height of the concrete around the membrane shell 20, so that the height difference can make the concrete poured in the vertical through hole 21 move to the periphery of the bottom of the membrane shell 20, and fully supplement the concrete to the floating slurry area 70 at the bottom of the membrane shell 20, thereby ensuring the compaction degree of the bottom concrete and ensuring the construction quality of the bottom plate concrete.

[0055] For example, the third pouring is divided into two steps, the first step: a certain amount of concrete is continuously poured around the membrane shell 20, the second step: after the vertical through hole 21 is filled, the membrane shell 20 is filled.

[0056] For example, as shown in the figure, Figures 4-7 When pouring the first time, the concrete around the membrane shell 20 is poured to 1 / 3 of the height of the ribbed beam 50; when pouring the second time, the concrete in the vertical through hole 21 is poured to 1 / 2 of the height of the ribbed beam 50; when pouring the third time: the concrete is poured around the membrane shell 20 to 2 / 3 of the height of the ribbed beam 50; when pouring the fourth time: after the vertical through hole 21 is filled, the membrane shell 20 is filled. By pouring the concrete in four steps, the pouring quality of the concrete can be improved, especially at the position of the bottom of the membrane shell 20 which is difficult to vibrate, and at the same time, the problem of concrete accumulation and cold joint in the pouring process can be avoided, wherein by pouring and vibrating the concrete in the vertical through hole 21 separately, the floating slurry at the position of the vertical through hole 21 can be vibrated and compacted, the compaction degree of the bottom of the membrane shell 20 is further improved, and the compaction degree of the bottom plate concrete is ensured.

[0057] Specifically, in the concrete pouring process, the vibrator 60 is used for vibrating, and when the concrete is poured around the membrane shell 20 along the dense rib beam 50, the displacement length of the vibration of the vibrator 60 is the vibration radius of the vibrator 60.

[0058] The above examples are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the spirit and scope of the present application.

Claims

1. A method for casting a multi-ribbed hollow floor slab, characterized by, The method comprises the following steps: S1, positioning and laying out: setting a coordinate network of the dense ribbed hollow floor on a template; S2, installing the bottom plate steel bars and the dense ribbed beams: installing the bottom plate steel bars and the longitudinal and transverse dense ribbed beams on the template according to the coordinate network, and fixing the bottom plate steel bars and the dense ribbed beams on the template by using fixing members; S3, installing the membrane shell and the top steel bars: setting a vertical through hole at the center of the membrane shell, installing the membrane shell in the open web formed by the longitudinal and transverse dense ribbed beams, installing the top steel bars at the top of the membrane shell, and connecting the bottom plate steel bars and the top steel bars by using connecting members to limit the membrane shell; meanwhile, the top steel bars are bound with the dense ribbed beams; S4, pouring concrete: pouring concrete at least three times; first pouring: pouring and vibrating concrete along the dense ribbed beams around the membrane shell, and observing the pouring of the concrete at the bottom of the membrane shell through the vertical through hole; when floating slurry appears in the vertical through hole, the pouring is stopped; the appearance of floating slurry means that the slurry covers the bottom surface of the vertical through hole; second pouring: pouring and vibrating a certain amount of concrete into the vertical through hole; the amount of concrete poured is such that the height of the concrete in the vertical through hole is higher than the height of the concrete around the membrane shell; third pouring: pouring and vibrating concrete into the remaining space of the vertical through hole and the dense ribbed beams around the membrane shell.

2. The multi-ribbed hollow floor cast concrete construction method according to claim 1, characterized in that: In step S2, the fixing member is a steel wire, and the template is provided with a plurality of installation holes through which the steel wire passes.

3. The multi-ribbed hollow floor cast concrete construction method according to claim 2, characterized in that: The bottom plate steel bars and the dense ribbed beams are both fixed on the secondary beams of the template by steel wires.

4. The multi-ribbed hollow floor cast concrete construction method according to claim 3, characterized in that: The bottom plate steel bars and the dense ribbed beams are also connected and fixed by steel wires.

5. The cast-in-place multi-ribbed hollow floor concrete construction method according to claim 1, characterized in that: In step S3, first limiting blocks are arranged between the bottom of the membrane shell and the bottom plate steel bars.

6. The cast-in-place multi-ribbed hollow floor concrete construction method according to claim 1, characterized in that: In step S3, second limiting blocks are arranged between the top of the membrane shell and the top steel bars.

7. The cast-in-place multi-ribbed hollow floor concrete construction method according to claim 1, characterized in that: In step S3, the connecting member is a steel wire rope.

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