JPH0663296B2 - Deck plate formwork method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for constructing a slab in a steel-framed building having a relatively large column spacing, and more specifically, it is driven as a lower surface formwork of such a slab. It concerns the construction method of slab concrete using the deck plate of.

[Prior Art] Generally, a concrete formwork for a floor slab of a building uses a support work by a pillar from a lower floor, and concrete is placed on the formwork on the lower surface on which plywood is laid. When constructing a building as a steel frame structure (hereinafter referred to as S structure), the floor height is set relatively high, the column spacing is set relatively large, and concrete placement is limited to slabs only. A deck plate construction method is widely adopted in which a deck plate is laid and concrete is directly cast on it to form a driving form. This deck plate construction method has the feature that it does not require support work on the lower surface of the slab with a high floor height,
The thickness of the steel plate, which is the raw material of the deck plate, is selected according to the size of the corrugation corresponding to the beam interval, and various products are provided.

[Problems to be Solved by the Invention] In the conventional method for constructing floor concrete, when using a plywood formwork, a scaffolding for work in a high place from the lower floor is necessary, and a loss for this lifetime is required. Is accounted for. In addition, it is difficult to secure stable working conditions for carpenters and general workers when assembling the formwork, which affects the construction period. Furthermore, it is necessary to consider the safety of work especially when dismantling the formwork.

On the other hand, when the deck plate method is used, some of the above problems are solved, but the amount of transportation and movement of the product increases, and moreover, the product is regulated by the transportation conditions and the product of the standard size or more is provided. This is not possible, and in addition to requiring man-hours for supporting and fixing, the required weight of the steel material for the beam is also increased. Further, in the case of a deck plate of medium wave or higher, since the thickness of the steel plate is considerably large, it is not easy to perform processing in the field, and the loss of material is large, which is uneconomical.

[Means for Solving Problems] The present invention has been developed for the purpose of addressing the above problems, eliminating the drawbacks, and improving the slab concrete construction method for an S structure. It provides a construction method for slab concrete. INDUSTRIAL APPLICABILITY The present invention is a conventional method of placing slab concrete by a deck plate construction method, but in particular, a deck plate is formed by on-site molding from a steel plate of a raw material, and the product is directly and continuously steel beam The gist is to lay it on top and use it as a bottom formwork of slab concrete.
Then, the present invention provides a step of preparing a place for installing a deck plate molding machine on a beam of a frame of a building, which also serves as a main installation, and a set of molding machines movably installed on the preceding floor. The main process is the process of laying and continuously laying the product obtained from this molding machine on the frame and laying it continuously, which makes it possible to use various deck plate construction methods. It has succeeded in eliminating the above-mentioned difficulties and utilizing the characteristics of this construction method to achieve a construction method that contributes to the improvement of economic efficiency.

[Embodiment] The deck plate formwork method of the present invention will be described in detail with reference to the drawings showing a preferred embodiment. FIG. 1 is a plan view of a building adopting the present invention. This building is an example of a 4-story factory building with a part of an 8-story living area. FIG. 2 is a sectional view of the main part of the four-story building. 1
Shows the whole building, 2 is a steel frame pillar of the building 1, and the space | interval is 10 m in each length and width. Reference numeral 3 denotes a steel frame beam laid over the pillar 2, and 4 denotes a temporary steel auxiliary beam laid in the middle of the beam 3 and hung. Reference numeral 5 is a preceding floor having a span of 1 and formed in the center of the plane of the building 1 in advance of other portions, and a deck plate molding machine 6 described in detail later is installed. The structure of the preceding floor 5 is not different from the structure of the other parts of the building 1, but the directions of the auxiliary beams 4 are orthogonal to each other. Reference numeral 7 denotes a deck plate, which is laid over the beam 3 and the auxiliary beam 4 and is connected to each other by abutting every 2 spans of the beam 3, and is about 20 m.
It is a product of. The deck plate 7 is laid on the entire floor surface according to the deck plate construction method of the present invention.
S in the figure is a temporary steel gantry.

FIG. 2 is a sectional view of the floor concrete, 8 is a slab concrete that is cast using the deck plate 7 as a lower surface form, and the reinforcing bars are not shown. The deck plate 7 has a height of the ridges 71 of 15 mm and a width of 25 by a corrugating drawing process from a 0.5 mm thick steel plate raw material.
It is molded into mm and is similar to what is called a "keystone plate", and it is a relatively small wave plate as a deck plate. As the auxiliary beam 4, a stretchable product commercially available as a steel temporary beam can be used.
The upper surface is aligned and supported by the hanging bolts 41. Of course, if a permanent steel beam is designed, this may be used.

As shown in FIG. 3, the deck plate molding machine 6 has a base 6 that is a frame structure of a main body 61 of the molding machine, a material supply unit 62 that is an uncoiler, a product delivery unit 63, and the like.
4, and the main body 61 has 8 to 12 stages of forming rollers 65. In the present invention, a constant length cutting machine, a product pillar, etc. are not necessary, and additionally, traveling wheels 66 are provided on the lower surface, and a rail 67 for the whole movement is added. The molding machine 6 is much smaller than a commercially available molding machine, and has a total length of 6 m or less and a total weight of about 11 tons for a normal orthograph, while it is about 10 tons with all equipment. 7 tons. The other outfitting as a molding machine is omitted.

[Operation] The operation of the present invention will be described based on the construction process of floor concrete construction. In the first step, a gantry S is formed as an installation place of the deck plate molding machine 6 on the outer side of the central portion of the first floor (second floor) in the column direction. A proper lifting device is used for this gantry S to form a main body 61 of the deck plate molding machine 6.
Is installed toward the inside of the building 1, the material supply unit 62 and the product delivery unit 63 are assembled, and the molding facility 6 is operably outfitted. Next, the coil steel plate 9 of the raw material is supplied to the material supply unit 6
2 and attach it to one end of the main body 61
Supply to. The deck plate 7 of the corrugated product is delivered from the product delivery section 63. The deck plate is continuously molded, and is cut within about 20 m within the range in which the shape of the product is maintained according to the distance between the beams 3. The deck plate 7 of the product is sequentially fixed to the upper surface of the beam 3 while being sent to the distance, and the intermediate portion is supported by the auxiliary beam 4 to form the deck plate floor surface. If concrete 8 is placed on this deck plate, the preceding floor 5 is formed across the building 1. Then, a pair of rails 67 are mounted on the preceding floor 5.
And the deck plate molding machine 6 is installed on the rail surface. An alternative method can be used to form the preceding floor 5, in order to meet the load condition, the deck plate floor surface is left without placing concrete, and the rail 67 is directly mounted on the steel beam 3. Can be laid and a deck plate molding machine 6 having a working floor in advance can be used, or the number of auxiliary beams can be increased. In any case, the weight of the molding machine 6 is to be supported from below without supporting work.

The molding machine 6 can run in the direction of the rail 67, and its operating direction is perpendicular to the rail 67. Then, on the preceding floor 5, the deck plate is molded in the same manner as described above, the product is sent out, and the intermediate auxiliary beam 4 supports the intermediate portion to fix it on the beam 3. All such tensioning work can be performed on the deck plate 7 under construction. The deck plate molding machine 6 is sequentially moved on the rail 67 to continuously supply the products, and the laying process is performed while forming a predetermined overlap on the side edge of the preceding deck plate 7. It is easy to cut out the deck plate for pillar-shaped protrusions on the floor. The construction process of the other half of the building 1 is the same as the above except that the extrusion direction of the product is changed, and if reinforcing bars are arranged on the upper surfaces of these deck plates 7 and stud bolts are planted on the beams 3. The bottom formwork of floor concrete is completed. In the construction of this example, the corrugated steel sheet metal working was performed by six people as one team. The concrete 8 is placed in the usual manner, and the work after curing only needs to recover the auxiliary beam 4. The work on the upper floor can be generally performed by repeating the above, but the deck plate of the preceding floor on the upper floor is prepared on the lower floor.

[Effects of the Invention] As described above, the deck plate formwork method of the present invention molds and produces the deck plate according to the construction site of the construction site and directly extrudes the deck plate to supply it to the beam frame. Therefore, no work such as transportation, transportation, or movement is required in handling the material that constitutes the main part of the deck plate construction method. Moreover, since it is produced and supplied continuously, the maximum length of material can be obtained as long as there is no inconvenience to the construction, the number of fixing points is reduced, and the labor involved is also a complicated deck plate Blocking work can be reduced. On the other hand, the cost of the deck plate molding machine will be borne at the construction site, but since thin steel plates can be used by the support of appropriately arranged auxiliary beams, a small molding machine itself is sufficient. There is no particular difficulty in operating on the preceding floor. Further, the worker is not required to have special skills, and the work itself does not impair the advantage of the deck plate construction method. Since the thin steel sheet can be locally processed by using scissors, it is easy and the material is not wasted. Generally, according to the comparison calculation with the conventional deck plate construction method in the building of the example of 60,000 m ² , the construction cost of 1,000 yen per m ² can be reduced, and the economical effect is extremely large. Moreover, the shortening of the construction period has been achieved, and an excellent deck plate formwork construction method can be provided.

[Brief description of drawings]

The drawings are for explaining the deck plate formwork method of the present invention based on an embodiment, FIG. 1 is a plan view of a factory building as an example, FIG. 2 is a detailed sectional view of a slab portion, and FIG. FIG. 1 is a schematic perspective view of a deck plate molding machine. 1 ... Building, 2 ... Steel column, 3 ... Steel beam, 4 ... Temporary auxiliary beam, 5 ... Preceding floor, 6 ... Deck plate molding machine, 7 ... Deck plate, 8 ... Slab concrete, 9 ... Coil steel plate, 41 ... Hanging bolts, 61 ... Main body section, 62 ... Material supply section, 63 ... Product delivery section, 64 ... Base, 66 ... Traveling wheel,
67 ... rail, S ... gantry.

Claims (4)

[Claims] 1. A method of constructing a slab by constructing a slab by laying a deck plate on a beam of a steel frame building and using the deck plate as a lower surface formwork, wherein the deck plate is a coil steel plate at a construction site. It was molded from
A deck plate formwork method characterized by continuously laying this deck plate directly on the frame structure. 2. A step of forming a preceding floor on a part of a frame of a beam supporting a slab, a step of installing a deck plate molding machine on the preceding floor, a step of molding a deck plate from a coil steel plate by the molding machine, The steps of continuously sending out deck plate products in the molding direction, the steps of supporting the deck plate on the beams, the steps of laying the deck plates one after another by moving the molding machine, and the steps of placing concrete on the deck plate. The deck plate formwork method according to claim 1, characterized in that 3. The deck according to claim 1 or 2, wherein the coil steel plate is a thin steel plate that can be easily machined on site, and the corrugation has a peak height of 15 mm or more and 30 mm or less. Plate formwork method. 4. A deck plate type according to claim 1, 2 or 3, wherein a temporary auxiliary beam is used in the middle of the beam for supporting the deck plate. Frame construction method.