JP4231470B2 - Solid foundation structure - Google Patents

Description

  The present invention relates to a solid foundation structure.

As the foundation of a house, a solid foundation as described in Patent Document 1 is adopted because of the advantages of durability and foundation insulation. In the conventional solid foundation structure, the foundation beam is erected vertically from the outer edge of the base.
JP2002-285562

The conventional solid foundation structure has the following problems.
(1) Since the foundation beam of the solid foundation is raised vertically from the outer edge of the base embedded in the ground, the whole including the outer periphery of the solid foundation is buried in the ground. For this reason, the solid foundation burial area is large.
The amount of residual soil, rebar, and concrete is large, and the range of interference between earth retaining, embankment excavation, and adjacent ground strength increases. In addition, the range of influence of ground strength that should be secured for the solid foundation covers a wide range of the outer periphery of the solid foundation, and there is no allowance for the buried space of piping to the site boundary.

(2) Since the foundation beam of the solid foundation was raised vertically from the outer edge of the base embedded in the ground, the work of joining the foundation and pillar of the building on the foundation beam cannot be performed from below the solid foundation. For this reason, an anchor bolt is embedded in the foundation beam, and a base with a hole or a column base flange is fastened to the anchor bolt from above, so that the workability of joining the base and the column is poor.

An object of the present invention is to reduce a solid foundation buried area and to narrow a range of influence of ground strength to be secured for a solid foundation.

Another object of the present invention is to secure a space for performing work for the structure on the foundation from below the solid foundation.

According to the first aspect of the present invention, in the solid foundation structure provided on the ground, the solid foundation provided with the foundation beam on the outer edge of the base is formed by projecting the foundation beam of the solid foundation from the outer edge of the base upward and outward from the ground. At the same time, the foundation beam is inclined with respect to the horizontal .

According to a second aspect of the present invention, in the first aspect of the present invention, a work hole for a foundation structure is provided on the lower surface of the foundation beam that protrudes upward and outward from the ground of the solid foundation. Is.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a heat insulating material is further disposed in the ground from the lower surface of the foundation beam that projects upward and outward from the ground of the solid foundation. It is a thing.

The invention of claim 4 is the invention according to any one of claims 1 to 3 , wherein the inclined foundation beam of the solid foundation is extended to the basement to form a basement inside the solid foundation.

(Claim 1)
(a) Since the foundation beam of the solid foundation is formed so as to project from the outer edge of the base to the upper side and the outside of the ground, the base is buried in the ground on the inner side of the outer periphery of the solid foundation. Less. For this reason, the amount of excavation, residual soil, reinforcing bars and concrete is reduced, and the range of mitigation such as earth retaining, embankment digging, and interference of adjacent ground strength is expanded. In addition, the range of influence of the earth strength that should be secured for the solid foundation is narrowed, and there is a surplus in the buried space of the piping up to the site boundary.

(Claim 2)
(b) A work hole for the structure on the foundation was provided on the lower surface of the foundation beam that protruded upward and outward from the ground of the solid foundation. Therefore, in the wooden base, the wood screw inserted from the work hole on the lower surface of the foundation beam can be directly joined to the base. In the steel column base, a tapping screw inserted from the work hole on the lower surface of the foundation beam can be directly joined to the column base.

(Claim 3)
(c) A heat insulating material was disposed in the ground from the lower surface of the foundation beam that protruded upward and outward from the ground of the solid foundation. Therefore, heat insulation is performed outside the ground buried portion of the solid foundation, and heat insulation is deeply avoided while avoiding the range of influence of the ground strength, and measures against freezing depth can be taken.

(Claim 1 )
(d) By making the foundation beam of the solid foundation inclined with respect to the horizontal, the formwork of the foundation beam can be made flat, and extension to the underground becomes easy.

(Claim 4 )
(e) The inclined foundation beam of the solid foundation can be extended underground, and a basement can be formed inside the solid foundation.
Digging for the basement can be done on an inclined surface, and construction can be done with open cuts, omitting mountain stops and vertical formwork.

FIG. 1 is a schematic diagram showing a solid foundation structure of Example 1, FIG. 2 is a schematic diagram showing a foundation joining work method in the solid foundation structure of Example 1, and FIG. 3 is a schematic diagram showing a solid foundation structure of Example 2. 4 is a schematic diagram showing the solid foundation structure of Example 3, FIG. 5 is a schematic diagram showing the solid foundation structure of Example 4, and FIG.
FIG. 7 is a schematic diagram showing a solid basic structure of Example 5, and FIG. 7 is a schematic diagram showing a solid basic structure of Example 6.

Example 1 (FIGS. 1 and 2)
In FIG. 1, a part of a solid foundation 10 is embedded in the ground 1. The solid foundation 10 includes a foundation beam 12 on the outer edge of a flat base 11. The solid foundation 10 is formed by projecting the foundation beam 12 from the outer edge of the base 11 to above and outside the surface of the ground 1, and the foundation beam 12 is inclined with respect to the horizontal. The solid foundation 10 has a dish-shaped shell structure, and the grounding surface of the base 11 and the foundation beam 12 that are embedded in the ground 1 and in contact with the ground 1 has a dish-shaped shape.

The solid foundation 10 is a portion of the ground 1 in which the base 11 and the foundation beam 12 are embedded, near the outer periphery of the solid foundation 10, in this embodiment, the portion corresponding to the foundation beam 12 is defined as the unbearable range 1B, and the rest is It is assumed that the earth bearing load range is 1A.

That is, the range of the foundation beam 12 on the four sides of the solid foundation 10 (base 11 and foundation beam 12) or two opposite sides (one side or three sides of the four sides is acceptable) (Range 1B)
Is a cantilever mechanism without earth resistance. In the present embodiment, the boundary between the bearing capacity bearing range 1 </ b> A and the bearing capacity unloading range 1 </ b> B is matched with the boundary section between the base 11 of the solid foundation 10 and the foundation beam 12. However, the boundary between the bearing capacity bearing range 1A and the bearing capacity unloaded area 1B may be matched with the middle part of the base 11 of the solid foundation 10 or matched with the middle part of the foundation beam 12 of the solid foundation 10. Also good.

According to Example 1, the portion of the ground 1 corresponding to a part of the outer periphery of the solid foundation 10 was set as the ground bearing unloading range 1B, and the remaining portion was set as the bearing load bearing range 1A. Therefore, even when the ground 1 corresponding to the outer periphery of the solid foundation 10 includes embankment or a slope surface, it is possible to easily secure the ground strength necessary for the solid foundation 10. Since only the ground 1 inside the outer periphery of the solid foundation 10 is set as the ground bearing load range 1A, the ground bearing strength of the outer periphery is not used, and the influence range of the ground bearing strength is reduced. Does not cause any interference.

Moreover, according to Example 1, since the ground-contact surface of the solid foundation 10 was made into the shape of a pan, the solid foundation 10
Can be made into a shell structure to make it easier to receive earth resistance.

The solid foundation 10 is a foundation in which the foundation beam 12 is projected from the outer edge of the base 11 upward and outward from the surface of the ground 1 as described above, and the foundation beam 12 is projected upward and outward from the surface of the ground 1. A work hole 13 for a foundation structure (for example, the base 3A of the first-floor building 2) is provided on the lower surface of the beam 12. As shown in FIG. 2, the wood screw 14A inserted from below into the working hole 13 can be directly joined to the wooden base 3A.

The solid foundation 10 is provided with a heat insulating material 20 in the ground from the lower surface of the foundation beam 12 formed to protrude upward and outward from the surface of the ground 1. By avoiding the influence range of the earth bearing strength for the solid foundation 10 (the earth bearing load range 1A), it is possible to insulate outside by the heat insulating material 20 deep in the ground around the base 11 and the foundation beam 12 of the solid foundation 10, and measures against freezing depth it can. The heat insulating material 20 does not need to cover the upper side surface of the foundation beam 12 (FIG. 1), and the outer surface of the foundation beam 12 not covered by the heat insulating material 20 can be a termite ant road segment 12A (FIG. 1). . The piping 40 can also be embed | buried in the range thermally insulated by the heat insulating material 20 in the ground bearing unloading range 1B of the ground 1 (
FIG. 1). The shortage of the outer heat insulation of the solid foundation 10 can be assisted by the local heat insulating material 21 provided on the inner surface of the foundation beam 12 (FIG. 1).

According to the first embodiment, the foundation beam 12 of the solid foundation 10 is formed so as to protrude from the outer edge of the base 11 to the upper side and the outside of the ground 1, so that the base 11 is placed on the ground 1 inside the outer periphery of the solid foundation 10. It becomes a thing to bury, and a solid foundation buried area decreases. For this reason, the amount of excavation, residual soil, reinforcing bars and concrete is reduced, and the range of mitigation such as earth retaining, embankment digging, and interference of adjacent ground strength is expanded. In addition, the range of influence of the earth strength to be secured for the solid foundation 10 is narrowed, and there is a margin in the buried space for piping up to the site boundary.

Moreover, according to Example 1, the working hole 13 for a structure on a foundation was provided in the lower surface of the foundation beam 12 projected over the ground 1 of the solid foundation 10 and outward. Therefore, the wooden foundation 3
In A, the wood screw 14A inserted from the work hole 13 on the lower surface of the foundation beam 12 can be directly joined to the base 3A.

Moreover, according to Example 1, the heat insulating material 20 was arrange | positioned in the ground from the lower surface of the foundation beam 12 projected above the ground 1 of the solid foundation 10 and outward. Accordingly, it is possible to perform heat insulation outside the ground buried portion of the solid foundation 10 and to deeply insulate the ground while avoiding the influence range of ground strength, and to prevent the freezing depth.

According to the first embodiment, the foundation beam 12 of the solid foundation 10 is inclined with respect to the horizontal, so that the form of the foundation beam 12 can be made flat and can be easily extended to the underground.

(Example 2) (FIG. 3)
3 differs from the first embodiment in that the beam 15 supporting the bundle 5 (which may be a pipe column) for the floor 4 of the building 2 is used as the inner surface of the foundation beam 12 facing the solid foundation 10. It is in that. Note that the bundle 5 and the tube pillar may be erected on the base 11 of the solid foundation 10.

( Reference Example 1 ) (Fig. 4)
Reference Example 1 Example 1 differs from the FIG. 4 is that in which the footing beams 12 of mat foundation 10 in a stepwise manner. Outer insulation of the solid foundation 10 becomes easy.

Example 3 (FIG. 5)
The third embodiment in FIG. 5 is different from the first embodiment in that the foundation beam 12 of the solid foundation 10 is curved. The appearance of the solid foundation 10 can be improved.

Example 4 (FIG. 6)
Example 4 Example 1 differs from FIG. 6, the inclined footing beams 12 of mat foundation 10 deeply extended underground, it lies in the formation of the basement 16 to the inside of the mat foundation 10.

In this example, the boundary between the ground bearing load range 1 </ b> A and the ground bearing unloading range 1 </ b> B in the ground 1 was matched with the intermediate portion of the foundation beam 12 of the solid foundation 10.

According to the fourth embodiment, the dug for the basement 16 can be performed on an inclined surface, and the construction can be performed by open cut by omitting the mountain stopper and the vertical frame. Moreover, it can construct with a flat formwork and can complete the waterproof surface of the basement 16 continuously.

In addition, when the floor height under the floor of the building 2 (semi-basement 16) is 1.4 m or less, it is not treated as a floor and can be effectively used for storage or the like.

Example 5 (FIG. 7)
Example 5 Example 4 is different from the FIG. 7, the work hole 13 provided on the lower surface of the foundation beam 12 of a solid foundation 10, the buried junction fittings 13A for building 2 steel column base 3B It is in. The bolt 14B inserted from below into the joint metal 13A of the work hole 13 can be directly joined to the steel column base 3B.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and even if there is a design change or the like without departing from the gist of the present invention. It is included in the present invention.

FIG. 1 is a schematic diagram showing a solid basic structure of Example 1. FIG. FIG. 2 is a schematic diagram illustrating a base joining work method in the solid foundation structure of the first embodiment. FIG. 3 is a schematic diagram showing the solid basic structure of the second embodiment. FIG. 4 is a schematic diagram showing the solid basic structure of Reference Example 1 . FIG. 5 is a schematic diagram showing a solid basic structure of Example 3 . FIG. 6 is a schematic view showing a solid basic structure of Example 4 . FIG. 7 is a schematic diagram showing a solid basic structure of Example 5 .

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ground 10 Solid foundation 11 Base 12 Foundation beam 13 Work hole 16 Basement 20 Thermal insulation

Claims (4)

In a solid foundation with a foundation beam on the outer edge of the base,
A solid foundation structure characterized in that a foundation beam of a solid foundation is formed so as to protrude from the outer edge of the base to the upper side and the outside of the ground , and the foundation beam is inclined with respect to the horizontal .   The solid foundation structure according to claim 1, wherein a work hole for a structure on the foundation is provided on a lower surface of a foundation beam protruding above and outward from the ground of the solid foundation.   The solid foundation structure according to claim 1 or 2, wherein a heat insulating material is disposed in the ground from a lower surface of a foundation beam protruding above and outward from the ground of the solid foundation. The solid foundation structure according to any one of claims 1 to 3, wherein the inclined foundation beam of the solid foundation is extended underground to form a basement inside the solid foundation.

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