JP3912047B2 - Floor reinforcement structure and reinforcement method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a floor reinforcement structure that can be used to reinforce floors such as clean rooms and computer rooms by using the space under the floor, and can also eliminate the operation of driving anchors that cause vibrations. And a reinforcing method.
[0002]
[Prior art]
Generally, in a clean room a, a computer room, etc., a free access floor e as shown in FIG. 4 is used to use the underfloor space b as an underfloor chamber for conditioned air c and equipment space for various wiring and piping d. Has been applied. In this free access floor e, a number of legs h such as pedestals are arranged on a floor slab g supported by a beam f at intervals, and a floor panel such as a perforated panel is laid thereon. The space between the double floor i and the floor slab g which are configured and formed by the floor panel is an underfloor space b.
[0003]
When the equipment j exceeding the design load of the floor slab g is installed on the free access floor e, it becomes necessary to reinforce the free access floor e by adding a reinforcing material. Conventionally, as shown in FIG. 4, using a ceiling surface k on the lower floor, a beam-reinforcing steel material m such as a solid H-shaped steel is hung between beams below in a direction perpendicular to the beams f. The floor is reinforced by applying a floor reinforcing steel material n such as solid H-shaped steel to the lower surface of the floor slab g between the beams f. At this time, the anchor p is driven in the horizontal direction with respect to the side surface of the column and the side surface of the beam f, and fixed to the anchor p to attach the beam reinforcing steel material m and the floor reinforcing steel material n. A gap formed between the floor reinforcing steel material n and the lower surface of the floor slab g is filled with a filler q.
[0004]
[Problems to be solved by the invention]
By the way, in the conventional reinforcement work, since solid materials are used as the reinforcing materials m and n, if the material is placed in the underfloor space b to be reinforced, the flow of the conditioned air c in the underfloor space b In view of the functionality required for the underfloor space b of the free access floor e, the reinforcing materials m and n are installed in the underfloor space b. Therefore, the beam reinforcing steel material m and the floor reinforcing steel material n are installed using the ceiling surface k of the lower floor. For this reason, when reinforcing the floor which comprises the free access floor e, there existed a subject that the influence would extend to a lower floor.
[0005]
In addition, when installing the reinforcing members m, n, any reinforcing steel member m, n cannot be attached to the column or floor slab g so as to be placed from above. Since it is necessary to perform attachment to the side surface of the beam f from the horizontal direction, in order to make the attachment strength sufficient in consideration of shear generated between these side surfaces, the anchor p is attached to the column or the beam f. It was necessary to attach the reinforcing steel materials m and n via the anchor p. When the anchor p is driven, considerable vibration is generated, and there is a problem that this vibration has an adverse effect on the surrounding area.
[0006]
Therefore, the present invention has been made in view of such a conventional problem, and can reinforce a floor such as a clean room or a computer room by using an underfloor space, and also causes an occurrence of vibration. An object of the present invention is to provide a floor reinforcement structure and a reinforcement method that can eliminate the work of driving the floor.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a floor reinforcing structure according to the present invention is provided with a double floor at an interval on a floor slab joined to a column, and an underfloor space is provided between the double floor and the floor slab. In the floor reinforcing structure in which is formed, a reinforcing material having through-holes disposed in the under-floor space and positioned above the upper surface of the floor slab with a gap between the pillars, and the reinforcement An attachment hardware that is joined to the reinforcing material between the material and the pillar, and is installed with a horizontal gap from the side of the pillar to the side and a vertical gap from the upper surface of the floor slab; and the reinforcement In order to join the material to the floor slab and the column, the column side surface and the horizontal slab between the floor slab upper surface and the mounting hardware are composed of the filler filled in the horizontal gap and the vertical gap. In addition, the above-mentioned supplementary material is A adjustment bolt for securing the gap between the upper surface of the wood and the floor slabs, the adjustment bolt is prevented from contacting with the floor slab after solidification of the filler, to the reinforcement It is provided.
[0008]
Further, in the floor reinforcing method according to the present invention, a double floor is provided on the floor slab joined to the pillar at an interval, and an underfloor space is defined between the double floor and the floor slab. In the floor reinforcement method, a reinforcing material having a through hole is positioned between the pillars in the underfloor space, and a gap is formed upward from the upper surface of the floor slab using an adjustment bolt provided on the reinforcing material. The reinforcing material is disposed at a distance, and is joined to the reinforcing material between the reinforcing material and the column, with a horizontal clearance from the side surface of the column to the side, and a vertical clearance from the upper surface of the floor slab. In order to connect the reinforcing material to the floor slab and the column, the horizontal gap and the vertical gap between the column side surface and the floor slab upper surface and the mounting bracket are installed. filled with a filler, the adjustment after solidification of the filler A bolt, characterized in that to avoid contact with the floor slab.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Preferred embodiments of a floor reinforcing structure and a reinforcing method according to the present invention will be described below in detail with reference to the accompanying drawings. As shown in FIGS. 1 to 3, the free access floor 1 reinforced by the floor reinforcement method according to the present embodiment is mainly separated from the floor slab 3 joined to the pillar 2 and on the floor slab 3. As a reinforcing material that is positioned between the pillars 2 and spaced from the upper surface of the floor slab 3 with a gap S in the underfloor space 5 partitioned between the double floor 4 provided The reinforcing beam 6 is joined to the reinforcing beam 6 between the reinforcing beam 6 and the column 2, with a horizontal gap H from the side surface of the column 2 to the side, and from the upper surface of the floor slab 3 to the vertical gap V. And a filler 8 filled in the horizontal gap H and the vertical gap V between the fixture 7 and the side surface of the pillar 2 and the upper surface of the floor slab 3 are provided. The
[0010]
The reinforcing beam 6 is made of an H-shaped steel having a length between the side surfaces of the opposing pillars 2, and the web 6 a penetrates the under-floor space portion partitioned by this to communicate with each other. The through-holes 9 are formed at appropriate intervals. A long hole that is long in the vertical direction is formed at the longitudinal end of the reinforcing beam 6. A gap S is formed below the lower flange 6b between the upper surface of the floor slab 3 so that they are not in contact with each other.
[0011]
As shown in detail in FIG. 2, which is a cross-sectional view taken along the line AA in FIG. 3, the mounting hardware 7 includes a channel member 10 having a U-shaped cross section and a joining plate 11 welded to the channel member 10. Composed. The back surface of the channel material 10 is opposed to the side surface of the column 2 via the horizontal gap H, and the lower surface is opposed to the upper surface of the floor slab 3 via the vertical gap V. In the groove opened toward the end portion in the length direction, the joining plate 11 is attached so as to be superimposed on the surface of the web 6a of the reinforcing beam 6. The joint plate 11 is formed with a similar long hole 12 which is overlapped with the long hole of the reinforcing beam 6 in the vertical direction, and the reinforcing beam 6 and the mounting hardware 7 are adjusted in the vertical direction with respect to each other by the long hole 12. Possible to join with bolts and nuts.
[0012]
In the illustrated example, reinforcing beams 6 are disposed from four sides around a column having a rectangular cross section, and four mounting hardware 7 are disposed around the column 2 so as to correspond to the reinforcing beams 6. These mounting hardware 7 are joined to each other by bolts and nuts so as to form a rectangular frame.
[0013]
A non-shrink mortar is used as the filler 8, and the vertical gap V from the horizontal gap H set between the back and bottom surfaces of the channel material 10 and the side surfaces of the pillars 2 and the top surface of the floor slab 3. By being filled and cured, the mounting hardware 7 and thus the reinforcing beam 6 are supported and joined to the pillar 2 and the floor slab 3 in a predetermined position.
[0014]
Further, on the reinforcing beam 6, a joist member 13 is placed on the upper flange 6 c at an appropriate interval along the length direction so as to be spanned between the adjacent reinforcing beams 6. A floor panel such as a perforated panel that spans the double floor 4 is laid. Then, by installing various devices 14 on the free access floor 1 configured in this way, it can be used as a clean room or a computer room.
[0015]
The reinforcing structure as described above is constructed according to the following procedure. First, an attachment metal 7 in which a joining plate 11 is welded to the reinforcing beam 6 and the channel material 10 is prepared. At this time, at least both ends in the longitudinal direction of the reinforcing beam 6 are detachably attached to the lower flange 6b so that a desired gap S can be secured between the reinforcing beam 6 and the upper surface of the floor slab 3. 3 A level adjusting bolt 15 for adjusting the height from the upper surface is provided. Also, a position adjustment bolt 16 is provided on the attachment metal 7 so as to be detachably attached to the rear surface thereof and for adjusting the horizontal gap H between the attachment metal 7 and the side surface of the pillar 2.
[0016]
Next, the double floor 4 is removed to open the underfloor space 5, and the reinforcing beam 6 and the attachment hardware 7 are carried into the underfloor space 5. The reinforcing beam 6 is positioned between the columns 2 and supported by the height adjusting bolt 15 so as to be spaced from the upper surface of the floor slab 3 with a gap S therebetween. After the arrangement, the height of the reinforcing beam 6 is adjusted using the height adjusting bolt 15. In the illustrated example, the reinforcing beam 6 surrounds the four surfaces of the column 2 and is disposed between other columns.
[0017]
On the other hand, a mounting hardware 7 is installed between the longitudinal end of the reinforcing beam 6 and the column 2. At this time, in a state where the long holes 12 of the mounting hardware 7 and the reinforcing beam 6 are overlapped and temporarily tightened loosely with bolts and nuts, the position adjusting bolt 16 is abutted against the side surface of the column 2 and sideward from the side surface of the column 2 The mounting hardware 7 is arranged with the horizontal gap H spaced apart from the upper surface of the floor slab 3 by the temporary fixing to the reinforcing beam 6. After the placement, the position adjustment of the mounting hardware 7 is performed using the position adjusting bolt 16. In the illustrated example, the mounting hardware 7 is formed as a rectangular frame. In this case, it is preferable to arrange the four mounting hardwares 7 around the pillar 2 in advance, and then connect these mounting hardwares 7 to each other by bolts and nuts and assemble them into a frame, and adjust the position in this state.
[0018]
If the height adjustment of the reinforcing beam 6 and the position adjustment of the mounting hardware 7 are completed in this way, the mounting height position of the mounting hardware 7 with respect to the reinforcing beam 6 is now adjusted using the long hole 12. The vertical gap V between the lower surface of the mounting hardware 7 and the upper surface of the floor slab 3 is adjusted, and then the bolts and nuts are finally tightened to fix the mounting hardware 7 to the reinforcing beam 6 in a fixed manner.
[0019]
When the setting of the positions of the reinforcing beam 6 and the mounting hardware 7 with respect to the floor slab 3 and the column 2 is completed, the filler 8 is filled over the vertical gap V and the horizontal gap H, and this is cured. When filling the filler 8, a barrier plate having an air vent hole may be disposed around the column 2 so as to cover the vertical gap V and filled from above the horizontal gap H. Thereby, the reinforcing beam 6 can be joined to the floor slab 3 and the column 2 via the mounting hardware 7.
[0020]
The reinforcing beam 6 is firmly fixed between the pillars 2 via the filler 8 filled in the horizontal gap H while being supported on the floor slab 3 by the filler 8 filled in the vertical gap V. Become. The bolt 15 is loosened after the filler 8 is solidified so as not to contact the floor slab 3. The bolts 15 and 16 used for adjusting the positions and heights of the mounting hardware 7 and the reinforcing beam 6 may be removed at this stage as necessary. Thereafter, the joist member 13 is disposed on the upper flange 6 c of the reinforcing beam 6, and the double floor 4 is installed on the joist member 13, thereby completing the reinforcing work.
[0021]
According to the floor reinforcing structure and the reinforcing method according to the present embodiment as described above, the floor slab 3 can be reinforced by the reinforcement work in the under-floor space 5 on the floor slab 3, and the lower floor as in the prior art. Since there is no need to use the ceiling surface of the building, it is possible to prevent the adverse effects on the lower floor due to the reinforcement work.
[0022]
Also, the field work during the reinforcement work can be done mainly by adjusting the height and position using the bolts 15 and 16, joining the various members with bolts and nuts, and filling the filler 8. Construction with vibration such as can be abolished, and also from this aspect, adverse effects on the surrounding area can be prevented.
[0023]
In addition, since the reinforcing beam 6 is arranged above the floor slab 3, the weight of the equipment 14 installed on the double floor 4 directly acts on the reinforcing beam 6 via the joists 13. While the weight of the device 14 can be sufficiently supported by the reinforcing beam 6, the weight of the device 14 does not act directly on the floor slab 3, so that the structural soundness of the floor slab 3 can be ensured. Specifically, the reinforcing beam 6 is in a state where both ends in the longitudinal direction are supported by being joined to the column 2 and the floor slab 3 via the filler 8, and the floor slab is supported even if the reinforcing beam 6 is bent and deformed. 3 is in a non-contact state, so that the weight of the device 14 is appropriately supported by the bending rigidity of the reinforcing beam 6 itself. Can be dispersed.
[0024]
Further, the reinforcing beam 6 is supported on the floor slab 3 via the filler 8 in the vertical gap V, and shear generated at the joint between the reinforcing beam 6 and the column 2 or the floor slab 3 is caused by the support structure. It can be appropriately received, and thereby sufficient joint strength can be ensured while omitting anchor construction.
[0025]
Further, since the reinforcement beam 6 provided with the through-hole 9 is used for reinforcement, the continuity of the underfloor space 5 can be secured, the flow of air-conditioned air can be secured, and the space for wiring and piping can be used. The functionality of the underfloor space 5 can be maintained as inferior to the conventional one.
[0026]
【The invention's effect】
As described above, according to the floor reinforcing structure and the reinforcing method according to the present invention, the floor slab can be reinforced by the reinforcing work in the under-floor space on the floor slab, and the ceiling surface of the lower floor as in the prior art. Because there is no need to use, it is possible to prevent adverse effects on the lower floors associated with reinforcement work.
[0027]
In addition, in the reinforcement work, the construction with vibration such as anchor driving can be abolished, and the adverse effect on the surrounding area can be prevented from this aspect.
[0028]
In addition, since the reinforcing beam is arranged above the floor slab with a gap, the load on the double floor can be sufficiently supported by the reinforcing beam, while the load does not act directly on the floor slab. The structural integrity of the slab can be ensured.
[0029]
Furthermore, the reinforcing beam is supported on the floor slab via a filler in the vertical gap, and shear generated at the joint between the reinforcing beam and the column or the floor slab can be appropriately received by the support structure, Thereby, sufficient joint part intensity | strength can be ensured, omitting construction of an anchor.
[0030]
In addition, because it is reinforced with reinforcing beams with through-holes, the continuity of the underfloor space can be secured, the flow of conditioned air is secured, and the underfloor used as equipment space such as wiring and piping The functionality of the space can be maintained in the same way as before.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of a floor reinforcement structure according to the present invention.
2 is an enlarged side cross-sectional view showing a main part of the reinforcing method for forming the floor reinforcing structure shown in FIG.
FIG. 3 is an enlarged plan view of a main part showing a part of the construction in the reinforcing method for forming the floor reinforcing structure of FIG. 1;
FIG. 4 is a side view showing a conventional floor reinforcing structure.
[Explanation of symbols]
2 Column 3 Floor slab 4 Double floor 5 Underfloor space 6 Reinforcement beam 7 Mounting hardware 8 Filler 9 Through hole S Gap

Claims (2)

In the reinforcing structure of the floor in which a double floor is provided at intervals on the floor slab joined to the pillar, and a subfloor space is defined between the double floor and the floor slab,
A reinforcing material having a through hole, located in the space below the floor, and disposed above the upper surface of the floor slab with a gap between the pillars;
An attachment fitting that is joined to the reinforcing material between the reinforcing material and the column, and that is installed with a horizontal clearance from the side surface of the column to the side and a vertical clearance from the upper surface of the floor slab;
In order to join the reinforcing material to the floor slab and the column, the side surface of the column and the horizontal gap between the upper surface of the floor slab and the fitting and the filler filled in the vertical gap As
An adjustment bolt for securing the gap between the reinforcing material and the upper surface of the floor slab before the filler is solidified, and is not in contact with the floor slab after the filler is solidified. A floor reinforcing structure, wherein an adjustment bolt is provided on the reinforcing material. In the method of reinforcing a floor in which a double floor is provided at an interval on a floor slab joined to a pillar, and a subfloor space is defined between the double floor and the floor slab.
A reinforcing material having a through hole is positioned between the pillars in the underfloor space, and the reinforcing material is spaced apart from the upper surface of the floor slab using an adjustment bolt provided on the reinforcing material. Place and
Joining the reinforcing material between the reinforcing material and the pillar, installing a mounting hardware with a horizontal gap from the side of the pillar to the side and a vertical gap from the upper surface of the floor slab,
Thereafter, in order to join the reinforcing material to the floor slab and the column, the horizontal gap and the vertical gap between the column side surface and the floor slab upper surface and the fitting are filled with a filler,
A method of reinforcing a floor, wherein the adjusting bolt is not brought into contact with the floor slab after the filler is solidified.

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