JP4120820B2 - Structure and construction method of fire protection wall - Google Patents

Description

  The present invention relates to a structure of a fire prevention partition wall provided inside a building and a construction method thereof.

  As is well known, according to the provisions of the Building Standards Law, buildings to be installed in fire-proof areas and semi-fire-proof areas must be fire-resistant buildings or semi-fire-resistant buildings depending on their use and scale, It is common to provide a fire prevention partition wall having a predetermined fire prevention performance as required.

  FIG. 6 shows an example of a fire prevention compartment wall by a dry construction method provided inside a semi-refractory building. This is provided as a partition wall between the clean room and the machine room. Reference numeral 1 is a pillar, 2 is a steel beam, 3 is a concrete slab, 4 is a stud, and the pillar 4 has a fireproof performance such as an ALC plate. The wall panel 5 having the structure is attached.

When constructing the fire barrier wall of the above structure, after constructing the frame of each floor, that is, the pillar 1, the steel beam 2, and the concrete slab 3, the pillar 4 is supported by the steel beam 2 via the bracket 6 and built in each floor, Usually, the wall panel 5 is attached to the stud 4, but the workability is not good if the wall panels 5 are attached one by one. For example, as shown in Patent Document 1, the stud and wall There has also been proposed a method in which a panel is unitized in advance, and the panel is attached to a housing in a lump.
JP-A-11-256736

  By the way, in order to secure fireproof performance, the fireproof partition wall as described above needs to be provided with a fireproof coating on the stud 4, but when the stud 4 is fixed to the steel beam 2 as described above, Similarly, it is necessary to apply a fireproof coating not only to the stud 4 but also to the steel beam 2 and the bracket 6. That is, in the semi-refractory building, although the steel beam 2 does not require the fireproof coating, the fireproof coating is necessary to secure the fireproof performance when fixing the pillar 4 between the fireproof compartment walls. is there.

  Therefore, in the case of providing this kind of fire protection partition wall, in order to provide the steel beam 2 with an originally unnecessary fireproof coating, a cost and a work period are inevitably required for this purpose. Therefore, effective improvement measures have been sought.

  In view of the above circumstances, the present invention does not require a fire-resistant coating of steel beams when providing a fire-proof partition wall in a building, and the structure of an effective fire-proof partition wall that can be efficiently constructed and its The purpose is to provide a construction method.

  The invention of claim 1 is a structure of a fire prevention partition wall provided in a building, and is a steel beam through a bracket in which a stud for attaching a wall panel having fire prevention performance such as an ALC plate is fixed to a concrete slab. The wall panel is attached to the steel beam side of the intermediate column.

  The invention of claim 2 is a method for constructing a fireproof compartment wall having the structure of claim 1, wherein a plurality of wall panels having fireproof performance such as ALC plates are arranged in parallel in the vertical direction, A large wall unit is grounded by connecting each wall panel to the studs arranged on the front side, and a bracket that protrudes to the back side through a notch formed in the wall panel is provided at the upper end of the stud. The wall unit is lifted and the tip of the bracket is temporarily supported on the upper part of the steel beam, and then a concrete slab is placed and the bracket is embedded and fixed in the concrete slab.

  The fire prevention partition wall according to the present invention has a structure in which the stud is fixed to the concrete slab via the bracket and the wall panel is attached between the stud and the steel beam. Conventionally, it is possible to omit the fireproof coating for the steel beam that is required.

  In the construction method of the present invention, the wall unit is pre-assembled and the bracket is embedded and fixed in the slab concrete in a state where the wall unit is temporarily supported by the steel beam. Can do.

  One embodiment in the case of applying the present invention when providing a fireproof partition wall in the quasi-refractory building shown in FIG. 6 will be described with reference to FIGS. The fire prevention partition wall of this embodiment is for partitioning a clean room and a machine room as in the case of FIG. 6, and basically has a structure in which a wall panel 5 such as an ALC plate is attached to a stud 4 as in the prior art. However, instead of fixing the stud 4 to the steel beam 2 as in the prior art, the stud 4 is fixed to the concrete slab 3, and the wall panel 5 is attached to the outside of the stud 4 (on the machine room side). In other words, the wall panel 5 is attached to the inner side (clean room side) of the intermediate pillar 4 by securing a gap between the intermediate pillar 4 and the steel beam 2. And in this embodiment, when constructing the fire prevention division wall of such a structure, the stud 4 and the wall panel 5 are preliminarily assembled as a large-sized wall surface unit U and are attached together. .

  First, the wall surface unit U employed in the present embodiment will be described with reference to FIG. This is made up of a large number of (10 in the illustrated example) horizontally-oriented flat plate-like wall panels 5 such as ALC plates arranged in the vertical direction, and H-section steel with small cross-sections at both ends on the surface side (machine room side). The inter-column 4 is arranged, and each wall panel 5 is connected to the inter-column 4 by the clamp fitting 7 and integrated. A cutout 8 is formed in the uppermost wall panel 5, and a bracket 9 is provided at the upper end of the stud 4 so as to project to the back side (clean room side) through the cutout 8. As shown in FIG. 2, a nut member 11 to which the level bolt 10 is screwed is provided at the tip. Similarly, as shown in FIG. 2, the ribs 4 are provided with reinforcing ribs 12 at the mounting positions of the brackets 9, and a junction plate 13 for connecting the upper pillars is provided at the top of the studs 4. The wall unit U is preliminarily laid in a state where it is placed flat on the site site, and when installed, the wall material unit U is erected by appropriately connecting a suspension material to the top of the stud 4 and is lifted and lifted to the mounting position. Is.

  In order to construct a fire barrier wall using the wall unit U, the wall unit U is lifted and the steel frame is constructed before the concrete slab 3 is constructed before the construction of the pillar 1 and the steel beam 2 in the clean room is completed. Temporarily support the beam 2. For this purpose, as shown in FIGS. 2 to 3, a temporary support plate 14 is attached to the upper part of the steel beam 2 in advance, and the temporary support plate 14 and the bracket 9 are overlapped to form both elongated holes 15, 16. The wall surface unit U is positioned in the longitudinal direction within the range of the long hole 15, and the vertical positioning is performed by the level bolt 10 within the range of the long hole 16. To do.

  As described above, the wall unit U is installed in a state of being temporarily supported from the steel beam 2, so that the concrete slab 3 is cast to form the floor of the clean room as shown in FIG. 3 to be buried and fixed. Thereby, the wall surface unit U is securely fixed to the concrete slab 3 through the bracket 9.

  In the fire prevention partition wall having the above structure, the stud 4 is fixed to the concrete slab 3 via the bracket 9, and the wall panel 5 is attached between the stud 4 and the steel beam 2. The frame 4 and the steel beam 2 are completely cut off by the wall panel 5, so that the fire-resistant coating for the steel beam 2 is not required when the column 4 is fixed to the steel beam 2 as in the prior art. can do.

  In addition, since the wall panel 5 is provided between the stud 4 and the steel beam 2 (that is, on the clean room side of the stud 4), the stud 4 is not exposed to the clean room side, and the stud 4 and a number of wall panels 5 are provided in advance. By attaching them together as the wall unit U, the work can be done very easily and efficiently compared to the case where the wall panels 5 are individually attached to the studs 4, and the construction accuracy is also improved. , Can contribute to reduction of construction cost and construction period.

  Further, in the above case, the wall surface unit U is temporarily supported on the steel beam 2 before the concrete slab 3 is constructed, and the concrete slab 3 is placed in this state to fix the wall surface unit U. When the concrete slab 3 is constructed, it is possible to secure a slit 17 between the concrete slab 3 in the machine room and the wall surface unit U to structurally insulate them as shown in FIGS. Thus, there is an effect that vibration propagation from the machine room to the clean room through the concrete slab 3 can be blocked. That is, conventionally, as shown in FIG. 6, the concrete slab 3 in the machine room and the concrete slab 3 in the clean room are usually constructed integrally, in which case vibration in the machine room is caused by the concrete slab 3. However, such a problem can be avoided by providing the slit 17 as described above to insulate the concrete slab 3 in the machine room from the wall unit U and the concrete slab 3 in the clean room. can do.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications and applications are possible as listed below, for example.

  The construction of the fire protection compartment wall according to the present invention is not limited to the use of the wall surface unit U as described above, and if possible, the studs 4 may be first attached and the wall panels 5 may be individually attached thereto. However, because of the structure in which the wall panel 5 is attached between the steel beam 2 and the stud 4, an efficient work cannot be expected in such a case, so that the wall surface unit U is previously assembled as in the above embodiment. It is realistic and preferable to attach them collectively.

  The shape and dimensions of the wall surface unit U employed in the construction method of the present invention are not limited to those of the above embodiment, and for example, those shown in FIGS. 4 to 5 can be suitably employed. As shown in FIG. 4, a bracket 9 is provided at a position slightly lower than the top part of the stud 4 and a notch 8 for passing the bracket 9 is provided on the lower side of the uppermost wall panel 5. The top of the stud 4 and the uppermost wall panel 5 are attached in a state of protruding on the concrete slab 3.

  In addition, when providing opening parts, such as a window, in the wall surface unit U, what is necessary is just to incorporate beforehand at the time of grounding, and as a wall panel 5, if it has a desired fireproof performance as well as an ALC plate, Other wall panels such as sandwich panels can also be employed. The shape of the stud 4 and the bracket 9, the form of temporary support for the steel beam 2 of the bracket 9 and the form of embedding and fixing to the concrete slab 3 are also arbitrary.

  Further, the present invention is optimally applied to a case where a refractory building wall is provided inside a semi-refractory building as in the above embodiment, but the present invention is not limited to this and has various uses, structures, and forms. It can be widely applied to buildings. Needless to say, the fire barrier wall of the present invention can be provided not only between the clean room and the machine room as illustrated in the above embodiment, but also between rooms for any purpose. In the case where it is provided between a room that dislikes vibration and a room that generates vibration (for example, between a hospital room and a machine room in a hospital), a slit is secured in the concrete slab as in the above embodiment. Thus, the same vibration propagation preventing effect can be obtained.

It is an elevation sectional view showing a schematic structure of a fire prevention division wall which is one embodiment of the present invention. FIG. It is a figure which shows a wall surface unit. It is a principal part expanded sectional view which shows schematic structure of the fire prevention division wall which is other embodiment of this invention. FIG. It is sectional drawing which shows an example of the conventional fire prevention division wall.

Explanation of symbols

2 Steel beam 3 Concrete slab 4 Spacer 5 Wall panel 8 Notch 9 Bracket

Claims (2)

It is a structure of a fire barrier wall provided in a building,
A pillar for attaching a wall panel having fireproof performance such as an ALC plate is provided at a side of the steel beam via a bracket fixed to the concrete slab, and the wall is provided on the side of the steel beam. A fire barrier wall structure with a panel attached. A method for constructing a fire barrier wall of the structure of claim 1,
A number of wall panels with fire prevention performance such as ALC plates are arranged in parallel in the vertical direction, and each wall panel is connected to the studs arranged on the surface side of the wall panels to assemble a large-sized wall unit. At the upper end, a bracket that protrudes to the back side through a notch formed in the wall panel is provided,
A method for constructing a fire protection compartment wall, wherein the wall unit is lifted and the tip of the bracket is temporarily supported on the upper part of the steel beam, and then a concrete slab is placed and the bracket is buried and fixed in the concrete slab.

Images