Construction method for slab penetration holes

Abstract

The aim is to reduce the effort required for installing sleeves while also reducing the effort required for slab reinforcement work on site. [Solution] The method for constructing a slab through-hole comprises a concrete pouring step in which a sleeve 60 is placed on a slab reinforcement unit 40 of a reinforced deck 30, concrete 22 is poured onto the reinforced deck 30, and a slab 20 is constructed with concrete 22 filled on the lower end side of the sleeve 60; and a core drilling step in which a through-hole 24 is formed in the slab 20 within the sleeve 60 that protrudes from the upper surface of the slab 20.

Description

Technical Field

[0006] ,

[0007] ,

[0001] The present invention relates to a method for constructing through-holes in a slab.

Background Art

[0002] There is known a sleeve method in which concrete is placed on a deck plate with an embedded sleeve installed through an embedding material in a recess of the deck plate, the embedded sleeve is embedded in the concrete, and then a through-hole is formed in the slab using the embedded sleeve as a guide (see, for example, Patent Document 1).

[0003] Also known is a spliced sleeve that is provided in series with a cylindrical member installed on a floor formwork and protrudes below the covering material (see, for example, Patent Document 2).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] By the way, in factories and the like, a deck with reinforcement bars in which slab reinforcement bars are pre-attached to the deck is known. With this reinforced deck, the reinforcement work of the slab reinforcement bars at the site can be reduced.

[0006] However, in the case of a reinforced deck, since the slab reinforcement bars pre-attached to the deck become an obstacle, it is difficult to install the sleeve, and it takes time and effort to install the sleeve.

[0007] Taking the above facts into consideration, the present invention aims to reduce the effort required for installing sleeves while also reducing the effort required for arranging slab reinforcement on site. [Means for solving the problem]

[0008] The method for constructing a slab through-hole according to claim 1 comprises a concrete pouring step of pouring concrete onto a reinforced deck with a sleeve installed on the reinforcement of the slab of the reinforced deck, thereby constructing a slab in which concrete is filled on the lower end side of the sleeve, and a core drilling step of forming a through-hole in the slab within the sleeve that protrudes from the upper surface of the slab.

[0009] According to the method for constructing a slab through-hole according to claim 1, in the concrete pouring process, a sleeve is placed on the slab reinforcement of the reinforced deck, concrete is poured onto the reinforced deck, and a slab is constructed with concrete filled on the lower end side of the sleeve. Next, in the core drilling process, a through-hole is formed in the slab within the sleeve that protrudes from the upper surface of the slab.

[0010] By using reinforced concrete decks, the amount of reinforcement work required for slab reinforcement on site is reduced. Furthermore, by installing sleeves on top of the reinforced concrete deck slab reinforcement, the slab reinforcement does not get in the way, making sleeve installation easier.

[0011] Thus, the present invention reduces the effort required for installing sleeves while also reducing the effort required for arranging slab reinforcement at the construction site.

[0012] In a typical sleeve construction method, a sleeve is installed on the top surface of the deck to create a through-hole in the slab. In this type of sleeve construction method, if there is slab reinforcement in the sleeve installation area, for example, an incision is made in the sleeve and the slab reinforcement is placed inside the sleeve. Then, a core drilling machine is used to cut the slab reinforcement inside the sleeve and create a through-hole in the deck. However, the slab reinforcement may shift inside the sleeve, making it difficult to cut.

[0013] In contrast, in this invention, a sleeve is installed on the slab reinforcement, and the slab reinforcement directly below the sleeve is embedded in the concrete, thereby suppressing displacement of the slab reinforcement during the core drilling process. Consequently, the slab reinforcement becomes easier to cut, and through holes can be easily formed in the slab.

[0014] Furthermore, by having the sleeve protrude from the top surface of the slab, the sleeve acts as a barrier, preventing rainwater that falls on the top surface of the slab after a through-hole has been formed in the slab from flowing into the through-hole and falling to the floor below.

[0015] The method for constructing a slab penetration hole according to claim 2 is the method for constructing a slab penetration hole according to claim 1, wherein the sleeve is fixed to a positioning member that is installed on the slab reinforcement and positioned relative to the reinforced deck.

[0016] According to the method for constructing a slab penetration hole according to claim 2, the sleeve is fixed to a positioning member that is installed on the slab reinforcement and positioned relative to the reinforced deck.

[0017] Therefore, in this invention, the sleeve can be easily positioned by positioning the positioning member relative to the reinforced concrete deck.

[0018] The method for constructing a slab penetration hole according to claim 3 is the method for constructing a slab penetration hole according to claim 2, wherein, before the concrete pouring step, the positioning member to which the sleeve is fixed is placed on the slab reinforcement and positioned on the beam supporting the reinforced deck.

[0019] According to the method for constructing slab penetration holes according to claim 3, before the concrete pouring process, a positioning member to which a sleeve is fixed is installed on the slab reinforcement and positioned on the beam supporting the reinforced deck.

[0020] Thus, in the present invention, by positioning the positioning member with the sleeve fixed to the beam supporting the deck with reinforcement bars, the sleeve can be easily positioned with respect to the deck with reinforcement bars.

Advantages of the Invention

[0021] As described above, according to the present invention, it is possible to reduce the labor for installing the sleeve and also reduce the labor for the reinforcement bar arrangement work of the slab on site.

Brief Description of the Drawings

[0022] [Figure 1] It is a longitudinal section showing a slab constructed by the construction method of the slab through-hole according to an embodiment. [Figure 2] It is a longitudinal sectional view showing the construction process of the slab shown in FIG. 1. [Figure 3] It is a plan view showing the construction process of the slab shown in FIG. 1. [Figure 4] It is a longitudinal sectional view showing the construction process of the slab shown in FIG. 1. [Figure 5] It is a plan view showing the construction process of the slab shown in FIG. 1. [Figure 6] It is a longitudinal sectional view showing the construction process of the slab shown in FIG. 1.

Modes for Carrying Out the Invention

[0023] Hereinafter, an embodiment will be described with reference to the drawings.

[0024] (Slab) In FIG. 1, a slab 20 constructed by the construction method of the slab through-hole according to the present embodiment is shown. The slab 20 is made of reinforced concrete and forms the floor of the structure. Further, the slab 20 is installed between the beam 10 and a beam not shown.

[0025] The beam 10 is, for example, a steel beam formed from H-shaped steel. This beam 10 has a pair of upper flange portions 12 and lower flange portions 14 that face each other in the vertical direction, and a web portion 16 that connects the pair of upper flange portions 12 and lower flange portions 14.

[0026] Multiple studs 18, which are embedded in the slab 20, are provided on the upper surface of the upper flange portion 12. The multiple studs 18 are arranged at intervals in the direction of the beam 10's material axis. The slab 20 is provided on this upper flange portion 12.

[0027] The slab 20 comprises a reinforced deck 30, multiple reinforcing bars 50, and concrete 22. The slab 20 also has multiple through-holes 24. Therefore, the slab 20 includes a sleeve 60 for forming the through-holes 24, a positioning member 62 for positioning the sleeve 60, and multiple opening reinforcing bars 70 for reinforcing the area around the through-holes 24.

[0028] The reinforcement bars 50 can be provided in the slab 20 as needed and can be omitted as appropriate.

[0029] (Reinforced concrete deck) As shown in Figures 1 and 2, the reinforced deck 30 is, as an example, a reinforced truss deck. This reinforced deck 30 has a deck 32 and a slab reinforcement unit 40. The slab reinforcement unit 40 is an example of slab reinforcement.

[0030] The deck 32 is formed from, for example, steel plates or corrugated steel plates, and forms the bottom formwork for the slab 20. Slab reinforcement units 40 are provided on this deck 32.

[0031] The slab reinforcement unit (reinforcement truss unit) 40 has multiple upper main reinforcements 42, multiple lower main reinforcements 44, multiple lattice members 46, and multiple suspension members 48, and is pre-fixed to the deck 32 by welding or the like in a factory or the like.

[0032] Multiple upper main reinforcement bars 42 are arranged at predetermined intervals on the upper side of the slab 20. These upper main reinforcement bars 42 are supported by suspension members 48, which will be described later. On the other hand, multiple lower main reinforcement bars 44 are arranged at predetermined intervals on the lower side of the slab 20.

[0033] The upper main reinforcement bars 42 and the lower main reinforcement bars 44 are arranged opposite each other in the vertical direction (the thickness direction of the slab 20). These upper main reinforcement bars 42 and lower main reinforcement bars 44 are connected by a lattice member 46.

[0034] The lattice members 46 are formed, for example, by reinforcing bars bent into a corrugated shape and are arranged along the axial direction (main reinforcement direction) of the upper main reinforcement 42 and the lower main reinforcement 44. The upper main reinforcement 42 or the lower main reinforcement 44 are fixed to the upper and lower tops of the lattice members 46 by welding or the like.

[0035] Multiple suspension members 48 suspend and support multiple upper main reinforcement bars 42 and lower main reinforcement bars 44. Furthermore, the multiple suspension members 48 are formed, for example, from reinforcing bars bent into a corrugated shape. These suspension members 48 are aligned along a direction (reinforcement direction) that intersects (approximately perpendicular to) the axial direction of the upper main reinforcement bars 42 and lower main reinforcement bars 44, and are arranged at a predetermined pitch in that axial direction.

[0036] Each suspension member 48 has multiple triangular truss sections 48A that protrude upward when viewed from the axial direction of the upper main reinforcement 42 and lower main reinforcement 44. Inside each truss section 48A, a pair of upper main reinforcement 42 and lower main reinforcement 44 connected by lattice members 46 are arranged. The upper main reinforcement 42 is then joined to the top of the truss section 48A by welding or the like, with the top abutting it from the inside.

[0037] The configuration of the slab reinforcement unit 40 can be changed as appropriate; for example, it may be a truss structure with one upper main reinforcement (upper chord) and two lower main reinforcement (lower chords).

[0038] (Relief muscles) Multiple reinforcement bars 50 are installed on the slab reinforcement unit 40 at the construction site. These reinforcement bars 50 are arranged in a direction (reinforcement bar direction) that intersects (approximately perpendicular to) the upper main reinforcement bars 42 and lower main reinforcement bars 44, and are fixed to the slab reinforcement unit 40 by binding wires or the like (not shown).

[0039] (Through hole) As shown in Figure 1, the slab 20 has multiple through-holes 24, as described above. Each through-hole 24 is a circular hole that penetrates the slab 20 in the thickness direction (vertical direction). Each through-hole 24 is also an equipment opening through which wiring, piping, etc., can be passed.

[0040] Multiple through-holes 24 are arranged at predetermined intervals. Additionally, sleeves 60 corresponding to each through-hole 24 are embedded in the upper end of the slab 20. At least one through-hole 24 can be formed in the slab 20.

[0041] (sleeve) The multiple sleeves 60 function as guides for the core drilling machine (core drill) when forming through holes 24 in the slab 20 using the core drilling machine on site. Each sleeve 60 is, for example, a cylindrical tube made of metal such as steel, and is positioned with its axial direction in the thickness direction of the slab 20.

[0042] The lower part of each sleeve 60 is embedded in the upper end of the slab 20, surrounding the upper end of the through hole 24. On the other hand, the upper part of each sleeve 60 protrudes from the upper surface of the slab 20. These sleeves 60 are fixed to a positioning member 62 and are installed on the slab reinforcement unit 40 via the positioning member 62 and a plurality of force distribution reinforcements 50.

[0043] The sleeve 60 is not limited to metal; it may also be made of paper, resin, or other materials.

[0044] (Positioning member) As shown in Figure 3, the positioning member 62 is formed, for example, by a mesh reinforcement. Multiple sleeves 60 are fixed to this positioning member 62 by welding or other means in a factory or similar facility. In other words, the positioning member 62 and the multiple sleeves 60 are unitized (sleeve unit).

[0045] Note that in Figures 3 and 5, the reinforced deck 30 and the distribution reinforcement bars 50 are omitted from the illustration to avoid making the diagrams too complex.

[0046] As shown in Figure 1, the positioning member 62 is installed on site on the slab reinforcement unit 40 of the reinforced deck 30 via multiple reinforcing bars 50, and is also positioned on the beam 10. In this state, the positioning member 62 is fixed to the reinforcing bars 50 and the slab reinforcement unit 40 by binding wires or the like (not shown). This positions multiple sleeves 60 at predetermined positions on the slab reinforcement unit 40.

[0047] Note that the positioning member 62 is not limited to mesh reinforcement; for example, it may be made of lath or other metal fittings.

[0048] (Reinforcement bars for opening) As shown in Figures 4 and 5, each opening reinforcement bar 70 is formed by multiple reinforcing bars joined in a grid pattern and is positioned around the lower part of the sleeve 60. In other words, the lower part of the sleeve 60 is positioned inside each opening reinforcement bar 70.

[0049] As shown in Figure 1, each opening reinforcement bar 70 is placed on a positioning member 62 and fixed to the distribution bars 50 and slab reinforcement units 40 by binding wires or the like (not shown).

[0050] The configuration of the opening reinforcement bars 70 can be changed as appropriate. Furthermore, the opening reinforcement bars 70 can be provided in the slab 20 as needed and can be omitted as appropriate.

[0051] (Construction method for slab penetration holes) Next, an example of a method for constructing slab penetration holes according to this embodiment will be described.

[0052] (Deck installation process) First, as shown in Figure 2, in the deck installation process, multiple reinforced decks 30 are erected on beam 10 and beams not shown. Next, multiple distribution reinforcements 50 are placed on the slab reinforcement unit 40 and fixed to the slab reinforcement unit 40 with binding wires not shown.

[0053] (Sleeve installation process) Next, in the sleeve installation process, a positioning member 62 to which multiple sleeves 60 are fixed is installed on the slab reinforcement unit 40 via multiple force distribution reinforcements 50. At this time, the positioning member 62 is positioned on the beam 10.

[0054] Specifically, the upper surface of the upper flange portion 12 of the beam 10 has the installation position of the positioning member 62 marked in advance at a factory or similar facility. The positioning member 62 is then positioned at the site according to this marking.

[0055] As a result, as shown in Figure 3, multiple sleeves 60 are positioned at predetermined locations on the slab reinforcement unit 40. In this state, the positioning member 62 is fixed to the load distribution reinforcement 50 and the slab reinforcement unit 40 by binding wire or the like (not shown).

[0056] Furthermore, marking out for beam 10 can be done not only in factories, but also, for example, on-site.

[0057] (Opening reinforcement reinforcement process) Next, as shown in Figures 4 and 5, in the opening reinforcement bar placement process, opening reinforcement bars 70 are installed around each sleeve 60 and fixed to the positioning member 62, the distribution bars 50, and the slab reinforcement unit 40 using binding wires or the like (not shown).

[0058] (Concrete pouring process) Next, as shown in Figure 6, in the concrete pouring process, unhardened concrete (ready-mix concrete) 22 is poured onto the reinforced deck 30. At this time, the unhardened concrete 22 is filled into the lower end of each sleeve 60. Then, as the concrete 22 hardens, the slab 20 is constructed.

[0059] (Core drilling process) Next, as shown in Figure 1, during the core drilling process, a through hole 24 is formed in the slab 20 within the sleeve 60 that protrudes from the upper surface of the slab 20.

[0060] Specifically, a core drilling machine (not shown) is inserted into the upper part of the sleeve 60, and a through hole 24 is formed in the slab 20 using the core drilling machine. At this time, the reinforcement bars 50 directly below the sleeve 60 and the slab reinforcement unit 40 are cut, and a through hole 24 is formed in the deck 32.

[0061] (effect) Next, the effects of this embodiment will be described.

[0062] As described above, according to the construction method for slab through-holes according to this embodiment, in the concrete pouring process, concrete 22 is poured onto the reinforced deck 30 with the sleeve 60 installed on the slab reinforcement unit 40 of the reinforced deck 30, and a slab 20 with concrete 22 filled on the lower end side of the sleeve 60 is constructed. Next, in the core drilling process, a through-hole 24 is formed in the slab 20 within the sleeve 60 that protrudes from the upper surface of the slab 20.

[0063] Here, by using the reinforced deck 30, the amount of reinforcement work required for the slab reinforcement units 40 on site is reduced. Furthermore, by installing the sleeves 60 on the reinforced deck 30, the slab reinforcement units 40 do not become an obstacle, making it easier to install the sleeves 60.

[0064] Thus, in this embodiment, the effort required to install the sleeve 60 can be reduced while also reducing the effort required for reinforcing the slab reinforcement unit 40 on site.

[0065] As a comparative example, it is conceivable to install a paper sleeve on the upper surface of the deck 32 of the reinforced steel deck 30. In this case, for example, a cut is made in the paper sleeve and a portion of the slab reinforcement unit 40 is placed inside the paper sleeve. Then, a core drilling machine is used to cut a portion of the slab reinforcement unit 40 inside the paper sleeve and form a through hole in the deck 32. At this time, a portion of the slab reinforcement unit 40 may shift inside the paper sleeve, making it difficult to cut that portion of the slab reinforcement unit 40.

[0066] In contrast, in this embodiment, a sleeve 60 is installed on the slab reinforcement unit 40, and the positioning member 62 directly below the sleeve 60, the distribution reinforcement 50, and the slab reinforcement unit 40 are embedded in the concrete 22. This suppresses displacement of the positioning member 62, the distribution reinforcement 50, and the slab reinforcement unit 40 during the core drilling process. Therefore, the cutting of the positioning member 62, the distribution reinforcement 50, and the slab reinforcement unit 40 becomes easier, and through holes 24 can be easily formed in the slab 20.

[0067] Furthermore, in the sleeve installation process prior to the concrete pouring process, the positioning member 62 to which the sleeve 60 is fixed is installed on the slab reinforcement unit 40 and positioned on the beam 10 that supports the reinforced deck 30.

[0068] In this embodiment, the sleeve 60 can be easily positioned relative to the reinforced deck 30 by positioning the positioning member 62 to which the sleeve 60 is fixed relative to the beam 10 that supports the reinforced deck 30.

[0069] Furthermore, in this embodiment, the sleeve 60 is made of metal. Therefore, in this embodiment, compared to the case where the sleeve 60 is made of paper, the sleeve 60 can be easily fixed to the positioning member 62 by welding or the like.

[0070] Furthermore, by having the sleeve 60 protrude from the upper surface of the slab 20, the sleeve 60 acts as a barrier, so that after the through hole 24 is formed in the slab 20, rainwater that falls on the upper surface of the slab 20 flows into the through hole 24 and is prevented from falling to the floor below.

[0071] (modified version) Next, a modified example of the above embodiment will be described.

[0072] In the above embodiment, the positioning member 62 was positioned relative to the beam 10 supporting the reinforced deck 30. However, the positioning member 62 is not limited to the beam 10; for example, it may be positioned directly on the reinforced deck 30.

[0073] Furthermore, in the above embodiment, the sleeve 60 is fixed to the positioning member 62. However, the sleeve 60 can be fixed to the positioning member 62 as needed, and the positioning member 62 can be omitted as appropriate. If the positioning member 62 is omitted, the sleeve 60 will be directly positioned, for example, on the slab reinforcement unit 40 of the reinforced deck 30.

[0074] Furthermore, in the above embodiment, the beam 10 is made of steel. However, the beam 10 is not limited to steel; it may also be made of reinforced concrete, steel-reinforced concrete, or the like.

[0075] Although one embodiment of the present invention has been described above, the present invention is not limited to these embodiments, and various modifications may be used in appropriate combinations with one embodiment, and of course, the invention can be implemented in various forms without departing from the spirit of the present invention. [Explanation of symbols]

[0076] 10 beams 20 slabs 22 Concrete 24 Through holes 30 Reinforced concrete deck 40 Slab muscle unit (slab muscle) 60 sleeves 62 Positioning member

Claims

1. A concrete pouring process in which, with sleeves installed on the reinforced concrete slab of a reinforced deck, concrete is poured onto the reinforced deck, and a slab is constructed with concrete filled on the lower end side of the sleeves, A core drilling step is performed to form a through hole in the slab within the sleeve that protrudes from the upper surface of the slab, A method for constructing slab penetration holes equipped with [a specific feature / feature].

2. The sleeve is fixed to a positioning member that is installed on the slab reinforcement and positioned relative to the reinforced deck. A method for constructing a slab penetration hole according to claim 1.

3. Before the concrete pouring process, the positioning member to which the sleeve is fixed is installed on the slab reinforcement and positioned on the beam supporting the reinforced deck. The method for constructing a slab penetration hole according to claim 2.

Images