JPH0384120A - Structure of flat foundation - Google Patents

Abstract

PURPOSE:To reduce the cost and to enhance the working efficiency by constructing foundation beams with a small beam and wide width in the shape of a lattice, making up and down double slats of a middle strip, and using a hollow section surrounded by each of slabs and foundation beams as an equipment space. CONSTITUTION:Floor slabs and foundation beams with a small D and wide beam width B and having 0.15 - 1.0 of D/B compared with 1.5 - 4 of a general foundation beam are formed, if desirable, a middle strip is up and down double slabs 2 and 3, and a hollow section 4 surrounded by each of slabs 2 and 3 and each of foundation beams 1 is used as an equipment space. The foundation beams 1 with a wide width are constructed in the shape of a lattice to minimize the foundation. According to the constitution, the civil engineering work and the forming work is reduced to save the construction cost, and the construction period can be shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Field of Application) The present invention relates to a flat foundation structure in a building with a relatively large span.

(Prior Art) Floor structures for buildings include those that combine floor slabs and beams, and those that do not have beams, such as flat slabs.

(Problem to be solved by the invention) In the former case, the inner part surrounded by beams can be used for equipment pits, etc., but it has a large height and the bottom floor is deep, requiring half the earthworks. , the amount of formwork work will increase.

The height of the latter without beams is extremely low, but
Equipment bits, etc. require a wall and another floor slab, making the shape complex and requiring a lot of space.

The present invention has been proposed in view of the problems of the prior art, and its purpose is to provide a flat foundation structure with a small foundation bottom while securing equipment space.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the flat foundation structure according to the present invention has a flat foundation constructed by constructing wide foundation beams in a lattice shape with a small beam size. is made up of upper and lower double slabs, and the hollow area surrounded by each of the slabs and each of the foundation beams is used as the equipment space.

In this case, it is desirable that the ratio D/B of the beam width B of the foundation beam be 0.15 to 1.0.

Further, it is possible to cut out both or one of the upper slab and the lower slab of the hollow portion surrounded by the foundation beam in the intercolumn zone.

(Function) According to the present invention, as described above, by constructing a flat foundation by constructing a flat foundation by constructing a wide foundation beam with a small beam size in a lattice pattern, the root cut depth becomes shallow, reducing the weight of earthworks and formwork work. The amount of space is reduced, and the space for equipment is secured by the hollow portion surrounded by the upper and lower double slabs formed in the inter-column zone and each of the foundation beams.

(Example) The present invention will be described below with reference to the illustrated embodiments.

In Figures 1 and 2, (1) is a beam with a small beam structure and a large beam width B, preferably with a D/B of 1.
It is a foundation beam that can be used as a floor slab and has a diameter of 0.15 to 1.0 compared to 5 to 4, and the intercolumn zone is an upper and lower double slab (2) (3).
A hollow part (4) surrounded by the slabs (2) and (3) and the foundation beams (1) is used as an equipment space.

In the figure, (5) is a pillar.

According to the illustrated embodiment, the wide foundation beam (1)
By constructing the pillars in a lattice pattern, the foundation bottom can be minimized and the hollow parts (4) of the intercolumn belt can be effectively used as equipment bits.

Again like this aEi! By reducing tt, the weight of earthworks and the amount of formwork work are reduced, construction costs are reduced, and the construction period is reduced by m.

Furthermore, by using a wider foundation beam (1), the slab area becomes smaller, no small beams are required, and heavy objects can be placed on top.

Furthermore, by using the hollow part (4) formed in the inter-column zone as an equipment space, the space that can be used as equipment space is reduced compared to the space area (a) surrounded by foundation beams and slabs in conventional general foundations. The effective rate of area (b) is 5.
According to the above example, the effective rate is 20%.
0 to 80%, allowing effective use of space.

According to the above embodiment, the upper and lower slabs (2) and (3) have a concrete structure integrated with the foundation beam (1), but
For the upper and lower floor slab parts of the hollow part (4), another material such as a lightweight precast concrete board may be used, or as shown in Figure 3, the upper floor slab in the hollow part (4) may be cut out, or the upper floor slab of the hollow part (4) may be cut out. As shown in the figure, the lower floor slab in the hollow part (4) is cut out, or as shown in Fig. 5, the lower floor slab in the hollow part (4) is cut out.
The upper and lower floor slabs may be omitted, or the structures shown in FIGS. 3 to 5 may be combined.

The hollow part (4) between the pillars is used as a space for equipment bits, water tanks, piping, etc., but since the hollow part (4) exists over the entire span, it is usually not used in the room allocation for building purposes. As shown in Part 6, part of the room is hollow (4
), so there are no restrictions on room allocation.

FIG. 7 shows an example in which a hollow part with upper and lower double slabs in the intercolumn zone in a flat foundation structure is used as a water tank (4A).

(Effects of the Invention) As described above, the present invention is constructed by constructing a wide foundation beam with a small beam size in a lattice pattern, and forming an inter-column zone into an upper and lower double slab surrounded by the same slabs and each of the foundation beams. By using the hollow part as equipment space, it is possible to secure equipment space and construct a flat foundation structure with a minimum foundation bottom.By reducing the foundation bottom, the weight of the earthwork and the amount of formwork work can be reduced. This will reduce construction costs, reduce construction costs, and shorten the construction period.

Further, according to the flat foundation structure according to the present invention, both or one of the upper slab and the lower slab in the hollow part formed in the intercolumn zone is cut out to create various spaces that correspond to the purpose. It is something that can be configured.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional plan view showing an embodiment of a flat foundation structure according to the present invention, and FIG. 21! 1 is a longitudinal sectional view thereof, FIGS. 3 to 5 are longitudinal sectional views showing the structure of the hollow part of the intercolumn zone, FIG. 6 is a plan view showing the relationship between the room side and the hollow part of the intercolumn zone, and FIG. FIG. 7 is a longitudinal sectional view showing a case where the hollow portion is used as a water tank. (1)...Foundation beam, (2)...Upper slab, (3)...Lower slab, (4)...Hollow part,
(5)...pillar.

Claims (3)

[Claims] (1) In a flat foundation constructed by constructing a lattice of wide foundation beams with small beam sizes, the space between the columns is made of upper and lower double slabs, and a hollow section surrounded by each slab and each of the foundation beams is installed. A flat foundation structure characterized by a large amount of space. (2) The ratio D/B of the beam thickness D and beam width B of the foundation beam is 0.
15. The flat foundation structure according to claim 1, wherein the value is 15 to 1.0. (3) The flat foundation structure according to claim 1, wherein the upper slab and/or the lower slab in the hollow portion surrounded by the foundation beam in the intercolumn zone are omitted.