JPS6311735A - Housing structure of factory building - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention relates to the frame structure of a reinforced concrete factory building, particularly in a factory for the production of precision equipment such as semiconductor products. This relates to the structural structure of buildings that have strict requirements regarding the vibration characteristics of the whole object and also require a high level of clarity within the room.

With the development of the electronics industry, such as the production of IC products with a high level of conventional technology, the construction industry itself has come to belong to the precision industry, and the production rooms where production machines are installed are equipped with measures against micro-vibration and indoor air quality. Clarity is now required. In conventional factories, the production room is placed on the first floor even when the factory is multi-story, and the filming measures are to install a strong floor on the ground or to install a machine stand insulated from the building. The reality is that this problem can be solved relatively easily by adding piles.

Regarding indoor air, so-called clean room equipment has been gradually upgraded to supply clear air with less dust particles into airtight rooms, and work floors and passageways are lined with gratings. This is done so that the settled dust can be blown out. Therefore, a space was required to install ducts for supplying and discharging clean air, which in turn was affected by the increased burden of factory floor cleaning.

Manufacturing factories for the electronic industry, which the invention seeks to solve, are experiencing technological innovations such as the rise in the degree of integration of IC products, and the production machines themselves are automated by incorporating such parts, and the products are becoming more and more Subject to mass production. Therefore, from the point of view of effective land use, a three-dimensional multi-story factory with a production room on the upper floor is required, and since there is also a production area on the lower floor, there is a demand for increasingly wider column spacing.

In a conventional factory, the pillar Sunokun would be 6 without structural constraints.
Many of them are up to 10m to 10m in length, and require further countermeasures against slight vibrations, especially in the production room on the upper floor for precision production.

In addition, the cleanliness of the clean room is also increased as an environmental condition in the factory, and when a grating floor structure is adopted, the rigidity of the floor in this area decreases, which in turn decreases the rigidity of the adjacent floor where equipment is installed. Not only that, but the mass of the entire floor is reduced, creating conditions that conflict with precision productivity, making countermeasures for microvibrations a truly severe challenge.

On the other hand, the presence of pillars poses a major constraint, especially in terms of equipment placement, and in dealing with later changes due to changes in the factory plan.

The present invention was developed especially for precision equipment factories, with a focus on microvibration countermeasures given to the frame structure in addition to normal wear resistance, and was also adapted to the characteristics of clean rooms. This invention first sets the column spacing to be several times larger than the conventional concept, increasing the degree of freedom in arranging equipment in the production room. The main idea is to provide a passageway section and place adjacent to it an equipment section that also serves as a mechanical room, an electrical room, etc., and to create a building with such a sectioned structure stacked on multiple floors. For this purpose, the floor of the large space section is made of integrated lattice beams and pre-stressed to cope with the decrease in rigidity of the large snow shed, and the entire floor is constructed with double floors to ensure a clean and comfortable environment. In order to suit the requirements of the room, the passage section is a simple connection structure, and the equipment section is a normal reinforced concrete frame structure. This invention particularly provides a frame structure for factory buildings that anticipates the needs of future rapid progress in the electronics industry.

Embodiment An embodiment to which the frame structure of the present invention is applied will be described based on the drawings. Fig. 1 is a schematic diagram showing a representative part of the plan view of a precision equipment production factory, and Fig. 2 is a schematic diagram showing a representative part of the plan view of a precision equipment production factory.
It is a sectional view along the n break.

This factory building is constructed of reinforced concrete, and in the diagram, 1 is columns arranged at equal intervals, and 2 is a wall that connects them in a series, with beams built into each floor to form a load-bearing wall. There is. 3 is the upper roof. Opposing pillars 1.1
A beam is spanned between them to form an integrated lattice beam 4,
The lattice beam 4 has a unit lattice 5 with the length of the column spacing as one side, and in this example, the column spacing is 5 to 6 m. A large space of 30 to 36 m on a side is formed surrounded by walls 2 on four sides. In a factory of such a scale, it is desirable to have a central pillar 6 in the center.

In the section 10, which is divided into a large space as described above, production machines are arranged according to the factory plan and serve as a production room. The adjacent large space section 10 is connected by a passage section 20, which also contains machines for the production room,
Facility section 30 and large space section 1 with equipment such as electricity
Also concatenate it with 0.

Next, the floors 7 of each floor of the large space section 10 constituted by the lattice beams 4 will be explained. The floor 7 consists of a structural floor 8 formed on the surface of the lattice beam 4 and a double floor 9 above which serves as a work surface.

First, as shown in FIG. 3, the structural floor 8 has X-shaped horizontal braces 81 on the upper surface of the outer periphery of the lattice 5 where the lattice beams 4 connect to the columns 1. For each grid 5, a lightweight concrete precast board (20th edition) 8 as shown in Figure 4 (1) is used.
2 is listed. 83 is a peripheral frame, 84 is a central rib, and the 20th plate 82 is preferably fixed to the lattice beam 4 by bolting.

A double bed 9 is shown in FIG. 4(2). Double floor 9 is lattice beam 4
A peripheral frame 92 is supported by bundle pillars 91 erected on the upper surface, a small PC beam 93 is erected on the peripheral frame 92, and a grating panel 94 is laid on the upper surface. The bundled columns 91 and surrounding frame 92, which are the structure of the double floor 9, are made of reinforced concrete, and when they are configured as Vierendeel beams with the lattice beams 4, it is possible to evaluate the rigidity of the structural floor 8 and the two layers. be.

The spaces of both the structural floor 8 and the double floor 9 are used for duct piping for the clean air supplied to the large space compartment, and the exhaust air is carried out through the grating 94 on the upper surface of the floor 7.

The ground floor floor is marked as 71. This may be similar to the floor described above, but the structural floor 8 is changed to an underground duct structure.

The middle pillar 6 is arranged to support the central intersection of the lattice beams 4. As shown in Fig. 5, the middle pillar 6 is made of unbonded filled steel pipe concrete, with a concrete adhesion blocking layer provided on the inner surface of the steel pipe to prevent adhesion between the filled concrete and the steel pipe, so as to minimize the horizontal cross section as much as possible. . 6
1 is a steel pipe, with horizontal notches 41 at the intersections of the lattice beams 4;
The lattice beam 4 is supported in the thick part by (.62
The vertical reinforcing bar 63 inside the column is its spiral hoop, and this hoop is attached to the outer circumference of the reinforcing bar 62 in a spiral direction,
The cage-shaped assembly is inserted into a steel pipe 61 and filled with high-strength concrete 64 to form a central column 6. The outer diameter of the middle pillar is approximately 70cm.

The connecting portion 65 between the middle pillar 6 and the lattice beam 4 is made of purely reinforced concrete, and the reinforcing bars 62 penetrate vertically and extend upward. The hoop reinforcement 63 is also attached in accordance with this, but a double hoop reinforcement 66 is further added above and below the joint and wound in the opposite rotational direction, and the pitch of the Muma-Snoquiral is shortened in this part so that it can be attached to the steel pipe 61. It is a replacement. The steel pipes 61 are joined on the upper and lower surfaces of the lattice beams 4 through cushioning materials, leaving horizontal gaps. As a result, the load of the lattice beam 4 is transmitted only by the concrete 64, and in this sense, horizontal slits may be provided in the steel pipe 61 as appropriate.

The passageway section 20 consists of a reinforced concrete slab having an upper surface on the floor surface 7 of the double floor 9, and is connected to the adjacent large space section 10.
10 and the large space section 10 and the equipment section 30 are connected only by a floor slab.

Finally, the equipment section 30 is a part that constitutes a rigid frame structure with ordinary reinforced concrete columns 31 and beams 32, and there is nothing special to note, but it has a higher rigidity than the large space section 10 and passage section 20 described above. is high. The floor height thereof is assumed to be the same as that of the aisle section 20.

action The effect of the present invention will be explained in terms of degrees Celsius based on the steps of Examples.

The large space section 10 is a part that constitutes a large span production room.
Regarding the division, first, pillars 1 and walls 2 are constructed around the outer periphery.

Next, in order to construct the lattice beams 4, formwork of uniform standards is assembled for each unit lattice 5, and they are connected so as to be supported by temporary supports at each intersection, and reinforcing bars and prestressing races are placed first. After assembling and placing, concrete is poured. After waiting for the concrete to harden, prestress is introduced into the grid 94. This prestress is introduced from the outer surface of the opposing column 1.1, and the effective tension is also introduced in the form of a grid within the large space section.

The lattice beam 4 generates stress as if it were a plate and conforms to the set dog.

Next, add braces 81 to the outer lattice of the lattice beam 4 and PC version 82
, and construct the structural floor 8. Next, a temporary simple moving device is placed on the upper surface of the structural floor 8 from the outside, and the double floor 9 is constructed on the structural floor 8 while using this. The double floor 9 has a peripheral frame 92 similar to the lattice beam 4 in a lattice shape, and together with the bundle columns 91, a Vierendeel frame, t? form a rigid beam body. And the surrounding frame 92 is 4
The double floor 9 is completed by spanning the small beams 93 made of PC between the lattice units of the circumference and laying the grating panels 94. Of course, depending on the layout of the production machine or its machine stand, the corresponding unit grid surface of the double floor is left as an opening. It is also possible to replace the 20th plate 82 of the structural floor 8 with a reinforced concrete slab on the lower surface of the lattice beam 4.

The structure of the large space section 10 is completed as described above, and the overall seismic design is such that the horizontal force of the lattice beams 4 is supported by the surrounding load-bearing walls (column 1 + wall 2) for each section via this complementary structure. reactor.

This means that even if the floor height increases, there is only an increase in the amount of material, and there is no increase in the burden on columns and lattice beams when handling horizontal forces, and the design is designed with only vertical loads. .

The adoption of the central column 6 is also a means of coping with the vertical load of the large-span lattice beam 4. The function of this center column 6 is to support the vertical axial force due to concrete characteristics. The middle pillar 6 is connected to the concrete (or foundation concrete at the ground surface) of the 64 reinforced concrete V-lattice beams 4 in the center, and transmits vertical force. Therefore, according to the above-mentioned configuration, the steel pipe 61 does not function as a compression material, but only acts as a jacket for the internal concrete 64, and there is no mutual movement between its inner surface and the outer surface of the internal concrete. The concrete itself has a high compressive strength, and such steel pipe concrete is called "super concrete". The details are disclosed in the specification of Japanese Patent Application No. 60-42979 filed by the present applicant. Therefore, when the middle columns are connected above and below the lattice beam 4, there is no steel pipe 61 in the cross section of the beam, so sufficient reinforcing bars are placed in this section to ensure smooth force transmission.

The floor of the passage section 200 is made of reinforced concrete with the upper surface aligned with the double floor 9, and is usually about 3 meters wide and supported by the wall 2 of the large space section 10. Therefore, the rigidity is small, and the mutual vibration propagation between the partitions 10.30 and other partitions 10.30 is reduced. Furthermore, an expansion joint may be actively provided in the floor slab of this portion to provide structural insulation from the other sections and the section 30.

Since the equipment section 30 is constructed of ordinary reinforced concrete, there are no special notes regarding construction. Anti-vibration materials should be used and installed in the machinery to be equipped.

Effects of the Invention A particularly noteworthy feature of the present invention is that the production room can be located either on the first floor or on the upper floor, and its structure forms a large spatial division. Therefore, as a production factory, there are no pillar restrictions on the arrangement of machinery, and support by beams formed in a lattice has a large degree of freedom for each unit lattice. Furthermore, because it is partitioned in equal directions by a grid of small units, it is highly responsive to changes in the factory plan.
It can meet the needs of large, flexible spaces.

These effects are mainly due to the high rigidity of the frame structure made of lattice beams made of prestressed concrete, and the double floor structure also meets clean room conditions and reduces equipment vibration. It also gives flexibility in the insulation means.

In addition, since the lattice beams are constructed based on regular unit grids, materials for temporary construction can be reused, reducing costs, and the side formwork can be demolded quickly while supporting the lattice intersections. , it is possible to shorten the construction period by repurposing it. By using small precast members for the concrete components, construction time and costs can be shortened here as well.

The introduction of prestressing clearly increases the number of workpieces in each process, but the work is standardized and repetitive, so it is efficient and compared to the magnitude of the effect of obtaining large lattice beams. It is never a loss.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a plan view of a production factory, FIG. 2 is a sectional view taken along the line ■-■ in FIG. 1, FIG. The figures are plan views of the main parts of the floor, with (1) the structural floor and (2) the double floor. FIG. 5 is an explanatory diagram of the middle pillar. 1 Column, 2 Wall, 3 Roof, 4 Lattice beam, 5 Unit lattice, 6 Middle column, 7 Each floor, 8 Structural floor,

Claims (5)

[Claims] (1) A building with a multi-layer structure as a whole, consisting of a large space section that serves as a production room for precision equipment, a passage section connecting these sections, and a section for mechanically powered equipment adjacent to the production room. The large space section has columns and walls on the outer periphery to constitute a load-bearing wall, and the floor supported by it consists of a prestressed reinforced concrete structure consisting of lattice beams with a lattice size with the column spacing as a unit. A factory building comprising a structural floor and a double floor on its upper surface, the equipment compartment having a rigid frame structure made of reinforced concrete, and these compartments being connected by a passage compartment. frame structure. (2) For the structural floor of the large space section, precast concrete slabs are constructed between unit grids, and for the double floor, grating panels are laid through small beams made of precast concrete, and bundled columns are installed. The frame structure according to claim 1, which is supported on a lattice beam by a Vierendeel frame. (3) The frame structure according to claim 1 or 2, wherein the lattice beam has horizontal braces on the unit lattice plane of the outer peripheral portion. (4) The frame structure according to claim 1, wherein the passage section connects the adjacent large space section or the large space section and the equipment space only by a floor slab. (5) The large space section has a central column made of steel pipes and concrete in the center, and supports axial loads at the intersections of the lattice beams, as set forth in any one of claims 1 to 4. frame structure.