JP4481882B2 - Non-framework foundation structure for buildings - Google Patents

Description

  The present invention relates to a building foundation structure comprising a concrete foundation block.

  Conventionally, a foundation structure of a building has a groove of a predetermined depth excavated along an area where the foundation of the building is placed on the foundation ground, and an inner ground surface surrounded by the groove is also provided. Excavated to a predetermined depth (shallow than the groove) from the ground level, crushed stones and / or chestnuts are rolled on the groove and the ground inside, and vertically arranged above the groove and at other positions on the upper surface. And slab reinforcement is assembled, temporary frames are arranged along the vicinity of both side surfaces of the vertical reinforcement assembled at the groove position, and concrete is struck so as to embed these vertical reinforcements. It is said that the concrete was struck so as to embed the slab reinforcement.

  In such a basic structure of a conventional building, it takes a lot of time and effort to install a temporary frame that is arranged for hitting concrete. In order to solve this problem, the present applicant reduced the labor and time required to install temporary frames for placing concrete, and reduced the man-hours and costs of the building. The basic structure used and its construction method were proposed previously (see Patent Document 1).

However, in the foundation structure of a building as described in the above-mentioned Patent Document 1, since it consists of a concrete foundation block in which an outer part, an inner part and a bottom part are fixed, it cannot be disassembled and transported. There is a problem that it is sometimes bulky, and there is also a problem that it cannot be arbitrarily changed because the width of the bottom surface portion is fixed. In addition, since the foundation structure of the building is surrounded by the foundation structure, there is a problem in that pipes and the like cannot be arranged from the outer periphery of the building to the floor of the building.
JP 2003-96791 A

  The present invention has been made to solve the above-described problems, and can be easily transported without being bulky when transported to a construction site, and the width dimension between the outer wall and the inner wall can be arbitrarily changed during assembly. An object of the present invention is to provide a non-framework foundation structure for a building that is possible and can easily form an opening.

In order to achieve the above object, the invention according to claim 1 is a formless frame foundation structure of a building comprising a concrete foundation block having a predetermined length having an outer wall, an inner wall, and a bottom wall. An L-shaped member formed of concrete having an L-shaped cross section forming a bottom wall, and an I-shaped member formed of concrete having an I-shaped cross section forming the inner wall, and the L-shaped member A plurality of grooves having a predetermined depth are provided on the upper surface of the bottom wall at an appropriate interval so that the lower end portion of the I-shaped member can be fitted into the arbitrary groove .

According to a second aspect of the present invention, in the shapeless frame basic structure according to the first aspect, a thin portion is partially formed in the first I-shaped member, and the thin portion is machined in the portion. by providing a shock, dropping to are those which make it possible to form the opening.

According to the invention of claim 1, since it can be disassembled into an L-shaped member and an I-shaped member, it is not bulky when transported to the construction site, and can be easily transported, and a conventional formwork is required at the construction site. Construction of the foundation structure can be completed without any problems. Further, since the I-shaped member can be fitted into any groove, the width dimension between the outer wall and the inner wall can be arbitrarily changed.

According to the invention of claim 2 , since the opening can be formed by applying a mechanical impact to the thin portion, the L-shape is formed from the inner side where the foundation structure is connected and surrounded through the opening. It is easy to incorporate a reinforcing bar between the member and the I-shaped member, or to arrange a pipe or a pipe.

  Hereinafter, the non-form frame foundation structure of the building concerning the 1st embodiment of the present invention is explained. FIG. 1 shows a cross section of an inverted solid foundation structure completed by applying the shapeless frame foundation structure according to the present invention. The installer excavates the foundation ground 1 almost entirely at a predetermined depth (about 620 mm in this example) from the ground level GL in accordance with the vicinity of the outer periphery of the floor shape of the building. In this excavated area, a cement-based ground improvement material (cement solidifying material) is added to the excavated earth and sand, backfilled and rolled to form the improved ground 2a. The ground improvement material may be another soil stabilization material. A plurality of concrete foundation blocks 3 (non-framework foundation structures of buildings) having a predetermined length (for example, 1500 mm) are connected and assembled in the length direction on the upper surface of the improved ground 2a.

  The concrete foundation block 3 includes an L-shaped concrete foundation block L (L-shaped member) composed of a tall outer wall 3a (for example, 650 mm) and a bottom wall 3c, and an inner side of a tall wall (for example 450 mm). It has an I-shaped concrete foundation block I (I-shaped member) composed of a wall 3b, and grooves 31a and 31b having a predetermined depth (for example, 25 mm) are formed on the upper surface of the bottom wall of the concrete foundation block L. Here, the lower end portion of the I-shaped concrete foundation block I is fitted in the groove 31b. In addition, the lower end part of the I-shaped concrete foundation block I may be fitted into the groove 31a, and can be fitted at an arbitrary position during construction.

  Next, the improved ground 2b is generated in the same manner as described above up to the height of the inner side wall 3b on the ground surrounded by the connected concrete foundation block 3 and on the inner surface of the improved ground 2a. The improved ground 2b has a thickness of about 650 mm and a height of about 400 mm from the ground level GL. The upper end of the outer wall 3a of the concrete foundation block 3 is about 400 mm higher than the ground level GL.

  The reinforced concrete slab 4 is hit to the height of the outer wall 3a on the improved ground 2b inside the concrete foundation block 3 connected as described above. The horizontal upper surface of the reinforced concrete slab 4 is set at a predetermined required height (about 400 mm) from the ground level GL.

  The non-framework foundation structure thus constructed becomes a deck structure, and a building can be placed on the reinforced concrete slab 4. FIG. 1 shows a state in which a building base 11 is placed on a reinforced concrete slab 4 and fixed with an anchor (not shown), and columns and walls 12 are erected on the base 11. In addition, a connection metal fitting (not shown) is used for the connection of the concrete foundation block 3.

  In the above embodiment, the lower end portion of the I-shaped concrete foundation block I can be fitted into the arbitrary grooves 31a and 31b of the bottom wall of the L-shaped concrete foundation block L, so that the concrete foundation block 3 During the assembly, the width dimension between the outer wall 3a and the inner wall 3b can be arbitrarily changed. Moreover, since the concrete foundation block 3 is decomposed into an L shape and an I shape before being constructed at the construction site, it is easy to transport without being bulky.

  Next, a non-framed frame basic structure of a building according to the second embodiment of the present invention will be described. FIG. 2 shows a cross section of a solid foundation structure completed by applying the formless frame foundation structure according to the present invention. As shown in FIG. 1, the builder forms an improved ground 2a in the vicinity of the outer periphery of the floor shape of the building with respect to the foundation ground 1, and a predetermined length is formed on the upper surface of the improved ground 2a with a non-frame. A plurality of concrete foundation blocks 3 (non-framework foundation structures of buildings) are connected and assembled in the length direction.

  The concrete foundation block 3 is composed of the same members as described above, but the I-shaped concrete foundation block I is formed in the same height as the outer wall 3a of the L-shaped concrete foundation block L. ing. Here, the lower end portion of the I-shaped concrete foundation block I is fitted into the groove 31a so that the width dimension between the outer wall 3a and the inner wall 3b is small. Further, an opening 32 is formed by punching out the side surface portion of the I-shaped concrete foundation block I, and is an inner side surrounded by the connected concrete foundation block 3 and in the inner side of the improved ground 2a. On the upper side, the improved ground 2b is generated up to about the middle position of the height of the opening 32, and the reinforced concrete slab 4 is struck on the improved ground 2b.

  FIG. 3 shows a front view and a cross section of an I-shaped concrete foundation block I of the concrete foundation block 3. The I-shaped concrete foundation block I is partially formed with a plurality of thin portions 33 at the lower end portion, and mechanical impact, for example, a hammer is applied to the thin portion 33. Thus, the opening 32 can be formed by dropping off. In addition, the thin part 33 is not restricted to this example, For example, you may form two or more round shape in the intermediate part of a height direction at appropriate intervals.

  In the above embodiment, since the opening 32 can be formed in the side surface of the I-shaped concrete foundation block I, the reinforcing bars can be incorporated into the inner peripheral region of the connected concrete foundation block 3 through the opening 32. The reinforced concrete slab 4 can be hit on the improved ground 2 b inside the concrete foundation block 3. Therefore, since it is not necessary to hit the reinforced concrete slab 4 to the height of the outer wall 3a, it is not necessary to generate the improved ground 2b to the height of the inner wall 3b. Therefore, the construction period can be shortened and the cost can be reduced.

  Next, a non-framed frame basic structure for a building according to a third embodiment of the present invention will be described. FIG. 3 shows a cross section of a fabric foundation structure completed by applying the shapeless frame foundation structure according to the present invention. As shown in FIG. 1, the builder forms an improved ground 2a in the vicinity of the outer periphery of the floor shape of the building with respect to the foundation ground 1, and a predetermined length is formed on the upper surface of the improved ground 2a with a non-frame. A plurality of concrete foundation blocks 3 (non-framework foundation structures of buildings) are connected and assembled in the length direction.

  As in FIG. 2, the concrete foundation block 3 is formed by punching out a part of the I-shaped concrete foundation block I to form an opening 32, and inwardly surrounded by the connected concrete foundation block 3. The cracked stone 5 is generated up to the height of the opening 32 on the inner ground of the improved ground 2a, and the reinforced concrete slab 4 is generated on the cracked stone 5.

  In the above embodiment, the base ground 1 is improved and the improved ground 2a is generated. At the same time, the crack stone 5 can be generated on the inner surface of the improved ground 2a, so the construction period can be shortened and the cost can be reduced. Can be planned. In any of the above-described embodiments, a corner block of the connected concrete foundation block 3 is an L-shaped corner block in plan view, and the same form of foundation block is used.

  The present invention is not limited to the configuration of each of the embodiments described above, and various modifications can be made without departing from the spirit of the invention. In the said embodiment, although what provided the some groove | channels 31a and 31b in the bottom wall 3c of the L-shaped concrete foundation block L was shown, you may provide one or three or more. . However, when there is only one groove, the width dimension between the outer wall 3a and the inner wall 3b is constant.

Sectional drawing of the foundation structure using the foundation structure of the building which concerns on the 1st Embodiment of this invention. Sectional drawing of the foundation structure using the foundation structure of the building which concerns on the 2nd Embodiment of this invention. (A) is a front view of the I-shaped concrete foundation block which concerns on a foundation structure same as the above, (b) is the sectional view on the AA line of (a). Sectional drawing of the foundation structure using the foundation structure of the building which concerns on the 3rd Embodiment of this invention.

Explanation of symbols

1 foundation ground 2a improved ground 2b improved ground 3 concrete foundation block (foundation structure)
3a Outer wall (part of L-shaped member)
3b Inner wall (I-shaped member)
3c Bottom wall (part of L-shaped member)
31a groove 31b groove 32 opening 33 thin part 4 reinforced concrete slab 5 chestnut stone 11 base 12 pillar / wall L concrete foundation block (L-shaped member)
I Concrete foundation block (I-shaped member)

Claims (2)

In a non-framework foundation structure of a building consisting of a concrete foundation block of a predetermined length having an outer wall, an inner wall and a bottom wall,
An L-shaped member formed of concrete in an L-shaped cross section that forms the outer wall and the bottom wall;
An I-shaped member formed of concrete in an I-shaped cross section forming the inner wall,
A plurality of grooves having a predetermined depth are provided at appropriate intervals on the upper surface of the bottom wall of the L-shaped member ,
A formless frame foundation structure for a building , wherein a lower end portion of the I-shaped member can be fitted into an arbitrary groove . The I-shaped member is partially formed with a thin portion, and the thin portion can be dropped to form an opening by applying a mechanical impact to the portion. The non-framework foundation structure for buildings according to claim 1 , wherein

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