JP2006283449A - Building foundation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a concrete foundation for a building, which is formed of a U-shaped cross-section frame material such as a prefabricated concrete block, and cast-in-place concrete, and which is based on a technological idea quite different from that of a conventional continuous footing or a mat foundation. <P>SOLUTION: A plurality of U-shaped frames, wherein a concrete infilling gap 1d is provided between an outside plate 1a and an inside plate 1b and wherein a communication part 11 for making an internal space 15 communicate with the gap 1d is provided in an opened state in the inside plate 1b, are arranged along a lower edge of an external wall of the building. A U-shaped frame 2 for an inner wall, wherein a concrete infilling gap 2d for an inner wall is provided between both the side plates 2a, and a communication part 11 for making the internal space 15 communicates with the gap 2d is formed in both side plates 2a, is arranged along a lower edge of an internal bearing wall. The cast-in-place concrete is flowed into the gaps 1d and 2d and the internal space 15 and solidified, and the top surface of the cast-in-place concrete is made flush. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a concrete foundation for a building, and more particularly to a building foundation formed from a concrete block produced in a factory or other U-shaped frame material and on-site cast concrete.

  Fabric foundations and solid foundations are mainly used for the foundations of small buildings such as ordinary houses. The fabric foundation is a concrete part with a concrete bowl-shaped rising part with the upper surface flattened along the extending direction of these walls on the ground part under the outer wall and internal bearing wall of the house to be built. It is. The solid foundation is formed by covering the entire ground surface below the building with concrete and forming a bottom, and on this bottom, a concrete bowl-like rising part similar to that of the cloth foundation is formed integrally with the bottom. . On both foundations, the foundation of the building is arranged on the upper surface of the formed bowl-shaped rising part, and pillars and rafters are attached to this foundation.

  Conventionally, most of such cloth foundations and solid foundations are made of cast-in-place concrete. That is, a ground or a concrete floor is appropriately formed inside the lower floor portion of the building to be constructed to form a ground or a concrete bottom that is higher than the surrounding ground. Next, on the ground or bottom of the part below the outer wall of the building and the internal bearing wall, the standing part is formed by standing and fixing two formwork plates facing each other at a predetermined interval on site. Assembling the formwork to do this, pouring concrete into this formwork and finishing the upper surface with a trowel.

However, it is difficult to assemble the formwork at the site, and the appearance of the cast-in-place concrete tends to be superior or inferior in appearance due to the skill level of the worker who installs the formwork plate. There was a problem that it was not always enough. In view of this, the applicants of the present application have proposed fabric foundations and solid foundations in combination with factory-produced concrete blocks and in-situ concrete in Patent Documents 1 and 2 below.
JP 2003-96792 A JP 2002-364001 A

  The present invention further improves and expands the foundation of the combined structure of the concrete block produced in the factory and the cast-in-place concrete proposed above, and is based on a technical idea completely different from conventional cloth foundations and solid foundations. It is an issue to propose.

  The invention of claim 1 includes an outer wall concrete filling gap 1d between the outer plate 1a and the inner plate 1b, and the inner plate 1b communicates the inner space 15 partitioned by the inner plate with the filling gap. A plurality of outer wall U-shaped frames having a communicating portion 11 are arranged to connect the end portions of the block along the lower edge of the outer wall of the building, and the inner wall concrete filling gap 2d is connected to both side plates 2a, A plurality of inner wall U-shaped frames 2 formed between the two side plates 2a and 2a, and communication portions 11 and 11 are formed on both side plates 2a and 2a to communicate the inner space 15 and the inner wall filling gap. However, the end portions of the block are connected to each other along the lower edge of the bearing wall inside the building, and the cast-in-place concrete is poured into the filling gaps 1d and 2d and the internal space 15 to be solidified. Provide architectural foundations The Rukoto is obtained by solving the above problems.

  The invention of claim 2 of the present application relates to a building foundation characterized by the formation aspect of the communication part 11 in the building foundation of claim 1, wherein the U-shaped outer wall has a tall outer plate 1 a and a tall inner side. A cross-sectional asymmetric U-shaped frame including a plate 1b, and the U-shaped frame for inner wall includes a symmetric U-shaped frame having both side plates 2a and 2a that are lower than the inner plate 1b of the U-shaped frame for outer wall. And both U-shaped frames are arranged with the upper edge of the inner plate and the upper edge of the both side plates at the same height, and the outer plate and the inner plate above the inner plate and above the both side plates. The building foundation according to claim 1, wherein the communication portion 11 having a height corresponding to a difference in height is formed.

  The invention of claim 3 of the present application aims at improving the efficiency of underfloor heating in the building foundation according to claim 1 or 2, wherein the bottom surface of the inner space 15 and the outer surface and inner wall of the inner plate of the U-frame for the outer wall. The building foundation according to claim 1, wherein a heat insulating material layer 13 is provided on the outer surface of both side plates of the U-shaped frame.

  The building foundation of the present invention having the above-described structure includes a plurality of outer wall U-shaped frames 1 arranged on the ground 12b along the outer wall of the building to be built, with the outer plate 1a on the outside and their U-shape. The small edge ends of the frame 1 are connected to each other, and a plurality of inner wall U-shaped frames 2 are arranged on the ground 12a along the internal bearing wall of the building to be built. The reinforcing bars 16 and the anchor bolts 17 are arranged in the concrete filling gaps 1d and 2d of these U-shaped frames, and the reinforcing bars 16 are arranged in the internal space 15 surrounded by these U-shaped frames as required. Preferably, after the heat insulating material layer 13 is disposed on the bottom surface of the inner space 15 and the outer surface of the inner plate 1b of the U-frame for outer walls and the outer surfaces of the side plates 2a of the U-frame for inner walls, the inner space 15 and the filling gap 1d are disposed. Pour concrete into 2d It is constructed by.

  As the outer wall U-shaped frame and the inner wall U-shaped frame, a factory-produced concrete frame is suitable. However, as other materials, a plastic frame, a wooden frame, or the like can be used. In particular, by using a recycled plastic or thinned wood to produce a U-shaped frame, it is possible to effectively use resources that have been discarded.

  The corners of the outer wall of the building are integrally formed with a side plate 3a having the same height as the outer plate 1a in a plane L shape on two adjacent sides of a square bottom plate having a side length substantially equal to the width of the outer wall U-shaped frame 1. An inner corner frame 4 in which side plates 4a having the same height as the inner plate 1b are integrally formed on two adjacent sides of a square bottom plate having a side length substantially equal to the width of the outer wall U-shaped frame 1 is used. To connect.

  In addition, in the portion where the outer wall and the internal bearing wall are connected to the T shape, for example, an outer wall U-shaped frame provided with a communication opening 1e connected to the concrete filling gap 2d of the inner wall U-shaped frame 2 on the inner plate 1b is used. The concrete filling gap 1d of the outer wall U-shaped frame and the concrete filling gap 2d of the inner wall U-shaped frame are communicated. Similarly, the inner wall bearing walls are connected to the T-shape by using the inner wall U-shaped frame in which the side plate 2a is provided with a connection opening 2e connected to the concrete filling gap 2d of the inner wall U-shaped frame 2. It is possible to allow the concrete filling gaps 2d of the inner wall U-shaped frame to communicate with each other. The portion where the inner wall U-shaped frame 2 is connected in a cross shape brings the ends of the U-shaped frame for the inner wall U-shaped frame into contact with each other so that the concrete filling gaps 2d communicate with each other. With such a structure, the concrete filling gaps 1d and 2d of the U-frames 1 and 2 connected to each other are communicated with each other and integrated with the reinforcing bars and concrete disposed therein, in order to ensure the strength of the foundation. Is important.

  It should be noted that the portion where the underfloor pipe is provided, such as the lower part of the bathroom or toilet, is surrounded by an L-shaped block whose upper edge is flush with the upper edge of the outer plate 1a of the outer wall U-shaped frame. The concrete is poured into the enclosed area so that the upper surface is lower than the surrounding area, and a recess for piping is formed on the upper surface of the foundation.

  The building foundation of the present invention uses a U-shaped frame made of factory-produced concrete blocks or other materials as a formwork for cast-in-place concrete, and therefore has an effect that a strong and accurate foundation can be easily constructed. In the concrete foundation of the present invention, underground beams of reinforced concrete are formed in the concrete filling gaps 1d and 2d of the U-shaped frame 1 for the outer wall and the U-shaped frame 2 for the inner wall, and the thickness in the width direction of the underground beam. Can be made thicker, the overall weight is increased, and the basic stability is extremely high. Furthermore, since the width of the underground beam can be increased, the rebar of the beam can be doubled and high strength can be imparted to the foundation.

  Furthermore, since the upper surface of the foundation is flat, the construction work of the roof can be performed safely. Moreover, since there is little underfloor space, the thermal efficiency in the case of floor heating is good, and there is an effect that effective floor heating is possible by providing the heat insulating layer 13 in the internal space 15 that is particularly under the floor.

  The present invention will be further described below with reference to the drawings. FIG. 1 is a partial cross-sectional view of a building foundation constructed by the method of the present invention. The area that becomes the lower floor part of the building is surrounded by the U-shaped frame 1 for the outer wall arranged along the outer wall of the building, and the U-shaped frame 2 for the inner wall is arranged in the part where the inner bearing wall of the building is provided. Yes.

  The U-shaped frame 1 for the outer wall and the U-shaped frame 2 for the inner wall of the illustrated embodiment are a U-shaped concrete block having a predetermined length in which the lower edges of the side plates 1a, 1b and 2a, 2a on both sides are integrally connected by the bottom plates 1c, 2c. Thus, concrete filling gaps 1d and 2d having predetermined intervals are provided between the side plates 1a and 1b and 2a and 2a. The inner side plate (inner plate) 1b of the outer wall U-shaped frame 1 is lower in length than the outer side plate (outer plate) 1a, and the upper part of the lower upper edge is partitioned by the outer wall U-shaped frame 1 15 is a communication section 11 that communicates with 15. The side plates 2a and 2a of the inner wall U-shaped frame 2 are lower in height than the inner plates 1b of the outer wall U-shaped frame. The inner wall U-shaped frame 2 is installed so that the upper edges of the side plates 2a and 2a are at the same height as the upper edge of the inner wall 1b of the outer wall U-shaped frame. A communication portion 11 that communicates with the internal space 15 partitioned by 2 is formed.

  The inner wall U-shaped frame 2 is excavated shallowly on the ground surface GL, and is disposed on the crushed stone layer 12a having the upper surface substantially the same height as the ground surface GL via the mortar layer 18. The outer wall U-shaped frame 1 excavates the ground surface GL along the outer wall of the building, and the upper edge of the inner plate 1b is flush with the upper edge of the side plate 2a of the inner wall U-shaped frame arranged as described above. It arrange | positions through the mortar layer 18 on the crushed stone layer 12b laid in this way.

  The outer wall U-shaped frame 1 is arranged so that the longitudinal ends thereof are connected to each other so as to surround a portion that is under the floor of the building. As shown in FIGS. 2 (a) and 2 (b), the outer wall 1a or the inner plate 1b is formed on both sides of a square bottom plate having a side length substantially equal to the width of the outer wall U-shaped frame 1 as shown in FIGS. Are connected using an outer corner block 3 and an inner corner block 4 which are integrally molded in a plane L shape.

  The inner wall U-shaped frame 2 is arranged at a portion below the inner bearing wall of the building by connecting the long ends thereof. As shown in FIG. 3, the inner wall 1b communicates with the concrete filling gap 2d of the inner wall U-shaped frame at the portion where the longitudinal end of the inner wall U-shaped frame 2 contacts the side surface of the outer wall U-shaped frame 1. The outer wall U-shaped frame 1 provided with the opening 1e is used for connection so that the communication opening 1e and the concrete filling gap 2d of the inner wall U-shaped frame contacting the communication opening 1e communicate with each other. As shown in FIG. 4, the portion where the inner U-shaped frame 2 is connected to the plane T shape also has a U-shaped frame for the inner wall provided with a communication opening 2e communicating with the concrete filling gap 2d of the U-shaped frame for the inner wall on the side wall 2a. 2, the communication opening 2e and the concrete filling gap 2d of the U-frame for the inner wall in contact with the communication opening 2e communicate with each other. As shown in FIG. 5, the U-frames 2 for the inner walls intersect each other in a plane cross shape, but the long ends of the U-frames 2 for the inner walls of the four sides face each other, and the concrete filling gaps 2d communicate with each other. Let

  And, in a state where a low embankment is made in the internal space 15 surrounded by the U-shaped frame 1 for the outer wall and the U-shaped frame 2 for the inner wall, the heat insulating mat 13 is placed along the side wall of the U-shaped frame surrounding the space. Insulate so that the crushed stone 12c is laid on the embankment, and the upper surface 14 has a height equal to the upper edge of the side plate 2a of the inner wall U-shaped frame and the upper edge of the inner wall 1b of the outer wall U-shaped frame. The mat 13 is laid.

  Next, the reinforcing bars 16 that are doubled in the concrete filling gaps 1d and 2d formed between the both side plates of the U-shaped frame 1 for the outer wall and the U-shaped frame 2 for the inner wall, that is, arranged with a gap in the beam width direction. The anchor bolts 17 are disposed between the double reinforcing bars, and the reinforcing bars 16 are also disposed in the inner space 15 surrounded by these blocks as necessary, and the gaps 1d, 2d and the inner space are arranged. 15 is casted in place, and the concrete upper surface is leveled with the upper edge of the outer plate 1a of the outer wall U-shaped frame to solidify the concrete.

  When the poured concrete is solidified, the base 20 is fixed to the upper part of the outer wall U-shaped frame 1 and the inner wall U-shaped frame 2 with the anchor bolts 17, and the fork 21 is passed between the bases. Build the building in the same way as the method.

  In the above-described embodiment, the height of the upper edge of the inner plate 1b of the outer wall U-shaped frame and the side plates 2a, 2a of the inner wall U-shaped frame is greater than the upper edge of the outer plate 1a of the outer wall U-shaped frame. By disposing the U-shaped frame so as to be low enough to be disposed, the filling gap 1d of the U-shaped frame for the outer wall and the filling gap 2d of the U-shaped frame for the inner wall and the inner space 15 surrounded by these are filled. A communication part 11 filled with cast-in-place concrete is formed, but a window with a notched upper edge is provided on the inner plate 1b of the U-frame for the outer wall and both side plates 2a, 2a of the U-frame for the inner wall. 11 can also be used. In short, when the outer wall U-shaped frame 1 and the inner wall U-shaped frame are arranged at a predetermined arrangement height, the filling gaps 1d and 2d of the blocks 1 and 2 and the inner space 15 surrounded by them are between. It is only necessary to form a communication portion that can be firmly integrated with the reinforcing bar and the cast-in-place concrete. However, even when such a window is provided, the upper edge of the inner plate of the U-shaped frame for the outer wall and the upper edge of the side plate of the U-shaped frame for the inner wall of the U-shaped frame for the outer wall are provided so that the upper surface of the foundation can be made flat. It is desirable to make it lower than the upper edge of the outer plate in view of facilitating construction work on site.

Partial sectional view showing an example of the building foundation of this invention The perspective view which shows an example of the outer corner frame used for an outer wall corner | angular part, and an inner corner frame The perspective view which shows the structural example of the part which the U-shaped frame for inner walls connects with the U-shaped frame for outer walls The perspective view which shows the structural example of the part which U-shaped frame for inner walls connects with the plane T shape The perspective view which shows the structural example of the part which U-shaped frame for inner walls connects with a plane decagon

Explanation of symbols

1 U-shaped frame for outer wall
1a Outer plate
1b Inner plate
1d Concrete filling gap for outer wall
2a Both side plates
2d Concrete filling gap for inner wall
15 Internal space
11 Communication part
13 Thermal insulation mat

Claims (3)

  An outer wall concrete filling gap (1d) is provided between the outer plate (1a) and the inner plate (1b), and the inner plate (1b) has an internal space (15) partitioned by the inner plate and the filling gap. A plurality of U-frames for outer walls, which are connected to each other, are arranged by connecting the ends of the blocks along the lower edge of the outer wall of the building, and the concrete filling gap (2d ) Between both side plates (2a, 2a), and the both side plates (2a, 2a) are both communicating portions (11, 11) that communicate the internal space (15) partitioned by the side plates with the filling gap for the inner wall. A plurality of inner wall U-shaped frames (2) are arranged along the lower edge of the load-bearing wall inside the building, and the ends of the blocks are connected to each other, and the filling gaps (1d, 2d ) And the internal space (15).   The outer wall U-shaped frame is a cross-sectional asymmetric U-shaped frame having a tall outer plate (1a) and a low-length inner plate (1b), and the inner wall U-shaped frame is the outer wall U-shaped frame. It is a U-shaped frame with symmetrical cross sections with lower side plates (2a, 2a) lower than the inner plate (1b), and both U-shaped frames are flush with the upper edge of the inner plate and the upper edge of the both side plates. The communication portion (11) having a height corresponding to a difference in height between the outer plate and the inner plate is formed above the inner plate and above the both side plates. 1 architectural foundation. The building foundation according to claim 1 or 2, further comprising a heat insulating material layer (13) on a bottom surface of the internal space (15), an inner plate outer surface of the outer wall U-shaped frame, and both side plates of the inner wall U-shaped frame.

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