JP7149094B2 - How to build a fire wall - Google Patents

Description

The present invention relates to a fire wall construction method for building a fire wall as a shaft section around an elevator shaft or the like in a building.

An atrium space that continues over multiple floors, such as an elevator shaft, can serve as a propagation path for fire, smoke, and the like in the event of a fire. If fire or smoke propagates through elevator shafts, etc., damage may spread over a wide area in a short period of time. Therefore, from the viewpoint of preventing the spread of fire, it is obligatory to partition the atrium space such as the elevator shaft with a fireproof wall (vertical hole partition).
As a structure of such a fireproof wall for a vertical hole section, for example, Patent Document 1 discloses a horizontal member arranged around the vertical hole section and a fireproof material whose upper end is attached and fixed to the lower surface of the horizontal member. and is disclosed.
In addition, as shown in Patent Document 2, the present applicant et al. A refractory wall consisting of studs and gypsum boards fixed to the inside and outside of the elevator shaft of the studs has been developed and put into practical use.
When constructing a fireproof wall for a pit section, after constructing the structure of the building in advance, the temporary scaffolding is used in a state where temporary scaffolding is assembled on the floor slab formed around the elevator shaft. It was common to build a fire wall around the elevator shaft by As a result, conventional fire wall construction is affected by the progress of framework construction.
Therefore, in Patent Document 3, as a method of constructing an elevator shaft without being affected by the progress of building construction, an elevator shaft is constructed by stacking elevator shaft main units formed of lightweight foamed concrete in the height direction. A method is disclosed. The elevator shaft body unit is a precast member having a cross-sectional shape surrounding the elevator shaft and having a height equal to or higher than the floor height.
However, the construction method of Patent Document 3 requires a large-sized crane for suspending the elevator shaft body unit. In addition, transportation of the precast elevator shaft body unit is troublesome and costly.

JP 2012-172370 A JP-A-10-140704 JP-A-5-171809

The present invention makes it possible to carry out the construction work of fireproof walls for pit partitions over multiple floors around an elevator shaft in parallel with the construction of the building frame, and to improve the safety during construction. An object of the present invention is to propose a method for constructing a fireproof wall that can be constructed at low cost.

The present inventors set up a temporary scaffolding in the space of the elevator shaft, and by constructing the pit section in parallel with the construction of the building frame, shortened the construction period and used the temporary scaffolding to indicate the position of the opening. Focusing on the fact that safety can be improved by using a mark, the method for constructing a fire-resistant wall according to the present invention was developed.
In order to solve the above-mentioned problems, the present invention provides a structure in which, in each construction zone including a plurality of floors, the opening for the elevator shaft can be installed around the opening for the elevator shaft in parallel with the structural construction of the building without being affected by the progress of the structural construction . A method of constructing a refractory wall forming a pit compartment. In the construction method of the fire wall of the first invention, the steps of assembling columns and beams provided around the opening in the work zone, covering the opening with a floor slab in the lowest layer of the work zone, A step of assembling a temporary scaffold continuously on the floor slab to reach the upper part of the construction section over a plurality of floors, and a step of forming a fireproof wall around the opening using the temporary scaffold.
According to this fire-resistant wall construction method, a floor slab is laid at the opening of the elevator shaft in the lowest layer of the construction zone, and temporary scaffolding is installed on the floor slab, so that the progress of the framework construction is affected. A refractory wall for the shaft section can be built around the elevator shaft without the need to. In addition, by installing the temporary scaffolding prior to the elevator shaft, it becomes easier to visually recognize the position of the opening, and the temporary scaffolding also functions as fall prevention means.

Further , in the construction method of the fire-resistant wall of the present invention, the temporary scaffolding is assembled along the periphery of the opening, and protective nets are constructed between the opposing temporary scaffolds, and the floors other than the lowest layer of the construction section are constructed. In the step of installing an entry prevention means around the opening and forming the fireproof wall, using temporary scaffolding reaching the upper part of the work area, a plurality of floors at once around the opening Build a fire wall for the pit compartment. In this way, even if construction materials, tools, or workers should fall, they will be caught by the protection net on the middle floor, so that the range affected by the fall accident can be prevented from expanding.
In addition, it is possible to clearly indicate the position of the opening and to prevent a worker from accidentally entering the opening.

According to the construction method of the fire-resistant wall of the present invention, the construction work of the fire-resistant wall for pit partitioning over multiple floors around the elevator shaft can be performed in parallel with the construction of the building frame. Moreover, according to the construction method of the fire-resistant wall of the present invention, it is possible to improve the safety during construction.

It is a sectional view showing the elevator shaft of the building concerning this embodiment. BRIEF DESCRIPTION OF THE DRAWINGS It is a figure which shows the outline|summary of the fireproof wall of this embodiment, Comprising: (a) is a perspective view, (b) is sectional drawing. It is sectional drawing which shows each construction stage of the construction method of the fire-resistant wall of this embodiment, Comprising: (a) is a frame formation process, (b) is a slab formation process. It is a figure which shows each construction step of the construction method of a fireproof wall following FIG.3(b), (a) is sectional drawing, (b) is a top view.

In this embodiment, a fire-resistant wall 2 for pit partitioning around an elevator shaft 11 over multiple floors is constructed in parallel with the structural work of the building 1 to shorten the construction period (see FIG. 1). . The building 1 of the present embodiment is made of reinforced concrete, steel, or steel-reinforced concrete, but the frame structure around the elevator shaft 11 of the building 1 is not limited.
In the construction method of the fire wall of this embodiment, the construction of the elevator shaft 11 is performed by dividing the building 1 into a plurality of work zones A, A, . . . in the height direction. A pit section is formed by providing a fire-resistant wall 2 around an opening 12 for an elevator shaft 11 formed on each floor. Each construction section A, A, . . . includes a plurality of floors (three floors in this embodiment). Specifically, as shown in Fig. 1, after building a fire-resistant wall 2 in a construction zone A that spans multiple floors, while leaving the temporary floor slab on the lowest floor of the construction construction zone, a new construction zone on the upper floor side will be constructed. At A, the building of the fire wall 2 is repeated to build the fire wall 2 for the elevator shaft 11 on all building floors.

As shown in FIG. 1, the fire-resistant wall 2 is formed for each floor (each floor). The space formed between the plate 4 is shielded. That is, the fireproof wall 2 is constructed in a square shape in a plan view so that the wall surface faces the elevator shaft 11 on each floor. As shown in FIGS. 2(a) and 2(b), the fire-resistant wall 2 is composed of a base material 21 and a surface (surface opposite to the elevator shaft 11) and back surface (surface facing the elevator shaft 11) of the base material 21. Each wall member (first wall member 22 and second wall member 23) is fixed.
The base material 21 is formed by combining steel materials having a U-shaped cross section made of fire resistant steel (FR steel). The base member 21 is composed of horizontal members 24 arranged along the lower surface of the beam 3 and the upper surface of the floor slab 4 and vertical members 25 erected between the upper and lower horizontal members 24 . In addition, the material constituting the base material 21 and the arrangement of each member (the horizontal member 24 and the vertical member 25) are not limited.
The wall member is made of gypsum board. The thickness of the first wall member 22 provided on the surface of the base material 21 is greater than the thickness of the second wall member 23 provided on the back surface of the base material 21 . The first wall member 22 of this embodiment is formed by laminating two gypsum boards 22a and 22b. In addition, the material constituting the first wall member 22 and the second wall member 23 is not limited to the gypsum board, and may be fire-resistant. Moreover, the structure of the fire-resistant wall 2 is not limited. Further, the space between the first wall member 22 and the second wall member 23 (the space formed between the base material 21, the first wall member 22 and the second wall member 23) may be filled with a heat insulating material. good.

The fireproof wall 2 is constructed by carrying out a frame forming process, a slab forming process, a scaffolding assembling process, and a wall construction process for each work section A. The construction of the fireproof wall 2 is basically carried out in order from the work zone A on the lower side, but a plurality of work zones A may be carried out in parallel. However, the construction section A on the upper side is carried out after at least the framework formation process of the construction section A immediately below is completed.
The skeleton forming process is a so-called skeleton construction. As shown in FIG. 3( a ), in the framework forming step, the pillars 5 and beams 3 provided around the opening 12 for the elevator shaft 11 are assembled. The pillars 5 and beams 3 around the opening 12 are constructed together with the pillars 5 and beams 3 in other areas of the building 1 . The dimensions, arrangement, etc. of the pillars 5 and beams 3 are not limited. The beam 3 spans between adjacent pillars 5. - 特許庁After forming the beams 3 around the opening 12 , the floor slab 4 is formed around the opening 12 . The floor slab 4 may be formed by laying precast members, or may be formed by cast-in-place concrete. After the floor slab 4 is formed, a gap is provided between the temporary scaffolding assembled into a rectangular shape in plan view around the opening 12 in the floors other than the lowest layer in the construction section A, and a plurality of scaffolds are placed on the floor slab. An entry prevention means 6 with a step horizontal is installed. As the entry blocking means 6, a handrail is formed.

As shown in FIG. 3(b), the slab forming process covers the opening 12 in the lowest layer of the construction section A with a temporary floor slab 7 or a permanent floor slab after construction of the pillars 5, beams 3, etc. in the framework forming process. It is a process.
The temporary floor slab 7 is composed of a support material 71 formed by combining pipe materials (so-called single pipe pipes) and a face material 72 laid on the upper surface of the support material 71 . A peripheral portion of the support member 71 is fixed to the floor slab 4 or the beam 3 around the opening 12 . After the support member 71 is installed, the upper surface of the support member 71 is covered with the face member 72 . The face material 72 may be a combination of a plurality of scaffolding boards, or may be a steel plate or the like. The temporary floor slab 7 is provided with an existing temporary floor material (for example, a flat deck). Moreover, the support member 71 is formed of a pipe material or a shaped steel material.
A protective net 8 is installed under the temporary floor slab 7. - 特許庁The protection net 8 is provided so as to cover the opening 12 in plan view. The edge of the protective net 8 secures the lower flange end of the beam 3 provided around the opening 12 .

The scaffold assembling step is a step of assembling a temporary scaffold 9 on the temporary floor slab 7 to reach the upper part of the work section A, as shown in FIGS. 4(a) and 4(b). FIG. 4(a) is a cross-sectional view showing the positional relationship between the temporary scaffolding 9 assembled in the opening 12, the fireproof wall 2, etc., and FIG. 4(b) is a plan view of the same.
The temporary scaffolding 9 is assembled along the perimeter of the opening 12 (perimeter of the elevator shaft 11). The temporary scaffolding 9 is continuous over a plurality of floors. A protective net 81 is installed between the temporary scaffolds 9 facing each other. The protective net 81 is provided so as to shield the space between the opposing temporary scaffoldings 9 (the space surrounded by the temporary scaffolding 9), and is provided for each floor according to the floor height of each floor (middle floor and upper floor). Install at multiple height positions. In addition, the stability of the temporary scaffolding 9 assembled in the vertical direction over a plurality of floors is ensured by arranging reinforcing members 91 that connect the temporary scaffoldings 9 together as necessary.

4(a) and 4(b), the wall construction process is a process of forming a fireproof wall 2 around the elevator shaft 11 using a temporary scaffolding 9. FIG.
In the wall construction process, first, a jig for fixing the base material 21 is fixed to the beam 3 provided around the opening 12 (elevator shaft 11). The jig is attached from a temporary scaffolding 9 provided inside the elevator shaft 11 .
After fixing the jig, the base material 21 is formed. Then, the wall members (the first wall member 22 and the second wall member 23) are fixed to the front and back surfaces of the base material 21. As shown in FIG.

The effects of the method for constructing a fire-resistant wall according to this embodiment will be described below.
According to the construction method of the fire-resistant wall of this embodiment, as shown in FIG. By installing a temporary scaffolding 9 reaching the upper part of the work zone A on the lowest floor slab (temporary floor slab 7 or permanent floor slab) of the work zone A, construction of the fire wall 2 is continuously performed over multiple floors. can do. Therefore, in the building under construction, without being affected by the progress of construction in other construction areas A, such as the frame work that is carried out for each floor, the pit section can be constructed over multiple floors at once around the elevator shaft 11. A fire wall 2 can be constructed for
In addition, since the opening 12 (elevator shaft 11) can be used as a transportation path for materials, workability is superior to the case where materials are transported for each floor.
Further, by installing the temporary scaffolding 9 prior to the elevator shaft 11, the position of the opening 12 can be easily recognized. In addition, the temporary scaffolding 9 also functions as fall prevention means. In addition, by installing the entry prevention means 6 around the opening 12, the position of the opening 12 can be clearly indicated, and an accidental entry of a worker, a work truck, etc. into the opening 12 can be prevented. be able to.
In addition, since the temporary scaffolding 9 is assembled along the edge of the opening 12 and the protective net 81 is installed in the inner space of the temporary scaffolding 9, even if the construction materials, tools or workers fall, It is received by the protective net 81 on the floor. Therefore, it is possible to prevent expansion of the range affected by the fall accident.

The embodiments according to the present invention have been described above. However, the present invention is not limited to the above-described embodiments, and each of the above-described constituent elements can be modified as appropriate without departing from the scope of the present invention.
For example, in the above-described embodiment, the construction of the fire wall 2 is performed using the temporary scaffolding 9 provided inside the elevator shaft 11, but the temporary scaffolding 9 is installed outside the elevator shaft 11, The fireproof wall 2 may be constructed from the inside and outside of the shaft 11 . In the above-described embodiment, the fire-resistant wall 2 is constructed by installing a plurality of gypsum boards that constitute the first wall member 22 and the second wall member 23, but the wall material (gypsum board) that constitutes the fire-resistant wall 2 The number and thickness of the walls are not limited, and the fire wall may be made of one wall material. Further, in the above embodiment, the fire-resistant wall 2 is constructed between the lower surface of the beam and the floor slab 4. A refractory wall 2 may be constructed between the upper surface of the

REFERENCE SIGNS LIST 1 building 11 elevator shaft 12 opening 2 fireproof wall 21 base material 22 first wall member 23 second wall member 3 beam 4 floor slab 5 pillar 6 entry blocking means 7 temporary floor slab (floor slab)
71 supporting material 72 facing material 8, 81 protective net 9 temporary scaffolding 10 elevator car

Claims (1)

A fire-resistant wall construction method in which a pit is formed around an opening for an elevator shaft in parallel with building frame work, without being affected by the progress of building frame work, in each work zone that includes multiple floors. There is
assembling columns and beams provided around the opening in the work section;
covering the opening with a floor slab in the lowest layer of the section;
assembling temporary scaffolding on the floor slab continuously over multiple floors to the upper part of the work zone;
forming a fire wall around the opening using the temporary scaffolding;
with
assembling the temporary scaffolding along the perimeter of the opening, constructing a protective net between the opposing temporary scaffoldings;
installing an entry prevention means around the opening in a layer other than the lowest layer of the construction section;
In the step of forming the fire wall, a temporary scaffolding that reaches the upper part of the work area is used to construct a fire wall for the pit section over multiple floors at once around the opening . How to build a fire wall.

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