JP3169230B2 - Building foundation - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precast concrete (PC) foundation for a building, and can be used, for example, as a foundation for a unit house.

[0002]

2. Description of the Related Art Conventionally, the foundation of a house has been made by casting concrete inside a foundation formwork assembled at a construction site. However, according to this cast-in-place concrete foundation, much labor and time are required. In addition, since the foundation cannot be made with high precision, such a problem can be solved as Japanese Utility Model Laid-Open Publication No.
843 and the like show a base using a PC block manufactured in advance at a factory.

Further, Japanese Utility Model Laid-Open No. 1-61242 has a foundation formed of a wide bottom footing member and a vertically long rising member, and both the footing member and the rising member are made of PC. It is shown.

[0004]

Since the foundation has a length extending along each side of the lower part of the building, a foundation formed of a PC footing member and a rising member as shown in Japanese Utility Model Laid-Open No. 1-61242 does not have a footing. Since the member and the erecting member will have a length in the longitudinal direction of the foundation, it is difficult to produce a long PC footing member and a PC erecting member in a factory and transport them to the construction site. To make the footing member and the rising member of the comparatively short length that can be manufactured at the factory and transported to the construction site, and connect a plurality of footing members and the rising member at the construction site in series to make the foundation Become.

[0005] When the foundation is made in this manner, since the connection between the PC footing members and the connection between the PC rising members are formed, there is a possibility that the strength of the entire foundation is reduced. There is a need for measures that can solve various problems.

An object of the present invention is to provide a foundation of a building which can secure the required overall strength even if it is made by connecting PC footing members and PC rising members. is there.

[0007]

According to the present invention, there is provided a footing member made of PC, and an erecting member made of PC on which a box-shaped housing unit is placed, which is disposed on the footing member. In the foundation of a unit type building, a plurality of footing members and rising members are connected in series, respectively, a plurality of housing units are connected in the horizontal direction, and a connecting portion between the footing members and a connecting portion between the rising members are connected. The connection between the housing units is misaligned and the plurality
The connecting part between the housing units among the rising members of
The rising member to be placed is a connecting portion between the footing members.
Are arranged at positions where they do not straddle .

[0008]

The footing portion of the foundation can be formed by connecting a predetermined number of footing members, and the rise of the foundation can be formed by connecting the predetermined number of rising members. The strength of the connection between the members is reinforced by the rising members, and the strength of the connection between the rising members is reinforced by the footing members, so that the overall strength of the foundation is as large as required. Further, in addition to the connection between the footing members and the connection between the rising members, the connection between the housing units on the rising member is also displaced, so that the load of the building that tends to concentrate on the connection between the housing units is reduced. It can be received at a position other than the connection between the rising member and the footing member, and the support strength of the foundation to the building is improved. Moreover, the footing members, the rising members,
Do not simply shift each connection between housing units
Rising member on which the connection between housing units is placed
At a position where the connection between the footing members is not straddled,
That is, the footing is set so as to fit within one footing member.
Load on multiple housing units
The erecting member that receives the concentrated surface is the wide surface of the footing member
Parts are supported, especially between footing members
The load applied to the connection portion is surely reduced.

[0009]

An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a plan view showing the entire foundation according to the present embodiment, and this foundation is for a unit house. In FIG.
The housing unit 1 which is a component of the unit housing is indicated by a two-dot chain line, and the housing unit 1 includes two types 1A and 1B having different lengths. The foundation is formed by a PC footing member 10 and a PC footing member 20. The footing member 10 includes the footing members 11 and 12 shown in FIGS. The linearly extending beam members 21 and 22 shown in FIG. 5 and the connecting members 23 to 27 shown in FIGS. 6 to 10 which are arranged between these beam members 21 and 22 to connect them are shown. is there.
As shown in FIG. 1, the housing units 1A and 1B
And two types of lengths 22-1 and 22-2 corresponding to the above.

In FIG. 1, four footing members 11 are provided, two footing members 12 are provided, nine beam members 21 are provided, and beam members 22 are provided.
-1 is two, beam member 22-2 is two, and connecting member 23 is four.
, Four connecting members 24, one connecting member 25, one connecting member 26, and two connecting members 27. These members have standardized predetermined lengths based on a module which is a standard dimension of the housing unit 1, and the footing members 11 and 12 form a three-faced footing portion in a plane, and the beam members 21 and 22 and connecting member 23
27 form a rising portion of a plane-shaped letter arranged on the upper portion of the footing portion. Connecting members 23-2
The position where 7 is arranged is a position corresponding to the corner of the housing unit 1.

In FIG. 2, the footing member 11 includes
A nut 31 for screwing the lower male screw portion of the reinforcing bar 30 shown in FIG. 12 is embedded in the position where the beam member 21 and the connecting members 23 and 24 are arranged.
A nut 33 for screwing a height level adjusting bolt 32 as a height level adjusting member shown in FIG. A nut 36 for screwing a bolt 35 inserted into the hole 34A of the connecting plate 34 shown in FIG. 11 is embedded in one end of the footing member 11, and this nut 36 is The recess 37 is provided deeper than the thickness.

FIG. 3 shows the footing member 12 on which the beam member 21 and the connecting members 25 and 27 are arranged, and nuts 31, 33 and 36 are also embedded in the footing member 12.

The beam member 21 shown in FIG. 4 has metal connecting members 38 at both ends of a main body 21A, and the connecting members 38 are male connecting members having a projection 38A. The protrusion 38A is provided with a hole 39 for driving a pin, and the main body 21A is provided with a vertical through hole 4 for inserting the reinforcing bar 30.
0 is provided. A metal tubular member (sheath tube) may be provided in the through hole 40. Male fitting 38 is body 2
It is not arranged at the center in the thickness direction of 1A and is shifted by A from the center in the thickness direction. In addition, the protrusion 3 of the male connection tool 38
The lower end of 8A is located above the lower end of base 38B by B, and therefore a concave step 41 is provided below male connector 38.

Male connecting members 38 are also provided at both ends of the main body 22A of the beam member 22 shown in FIG. 5, and have the same structure as the beam member 21. Differently, the through hole 40 is not provided.

The main body 23A of the connecting member 23 shown in FIG. 6 is a flat L-shape having extending portions 23B and 23C extending at right angles to each other, and a metal fitting is provided at the tip of each of the extending portions 23B and 23C. 42 are provided. This connection tool 42
Is a female connector having a groove 42A in which the projection 38A of the male connector 38 can be inserted and engaged up and down. A hole 43 into which a pin is driven is formed in the female connector 42. Body 2
3A is provided with a through hole 40 for inserting the reinforcing bar 30 as in the case of the connecting member 21, and an anchor bolt 4 serving as an anchor member of the housing unit 1 shown in FIG.
A bottomed hole 45 for inserting the hole 4 is also provided. A metal tubular member (sheath tube) may be provided in the bottomed hole 45. The female connector 42 is not arranged at the center in the thickness direction of the extending portions 23B and 23C, but is shifted by A from the center in the thickness direction to the inside of the house. The side surface of the female connector 42 outside the house is covered with a concrete covering portion 46 continuously extending from the extending portions 23B and 23C, and this side surface is not exposed to the outside. The groove 42 </ b> A of the female connector 42 does not reach the lower end of the female connector 42, but extends upward from this lower end to a position where B is left. Therefore, a convex step 47 is provided at the lower portion of the female connector 42. .

The main body 24A of the connecting member 24 shown in FIG.
Has a bulging portion 24B bulging inside the house and extending portions 24C and 24D extending in opposite directions by 180 degrees, and a female connector 42 is provided at a tip of the extending portions 24C and 24D. A through hole 40 and a bottomed hole 45 are formed in the main body 24A. Since the two housing units 1 are arranged at positions adjacent to each other, the connecting member 24 has a bottomed hole 45 for inserting the anchor bolt 44. Are provided.

The main body 25A of the connecting member 25 in FIG.
Is a flat T-shape having an extension 25B extending inward of the house and extensions 25C, 25D extending 180 degrees opposite to each other, and a female connector 42 is attached to the tip of these extensions 25B, 25C, 25D. Is provided. A through hole 40 and a bottomed hole 45 are formed in the main body 25A, and two bottomed holes 45 are provided.

The connecting member 26 in FIG. 9 has basically the same shape and structure as the connecting member 25 in FIG.
Is a flat T-shape having extensions 26B, 26C, 26D, and a female connector 42 is provided at the tip of each of the extensions 26B, 26C, 26D. However, the female connector 42 in the extension 26B is shifted by A in the opposite direction to the female connector 42 in the extension 25B of the connecting member 25. The reason for this is that when the connecting members 26 and 25 are arranged with the extending portions 26B and 25B facing each other, these extending portions 25
B and 26B can be connected to each other by the beam member 21 in FIG.

The main body 27A of the connecting member 27 shown in FIG.
Has bulging portions 27B, 27C bulging on both sides in the thickness direction, and has extending portions 27D, 27E extending 180 degrees opposite to each other. These extending portions 27D, 27E
Is provided with a female connection tool 42 at the tip thereof. A through hole 40 and a bottomed hole 45 are formed in the main body 27A.
7 has four bottomed holes 45 because four housing units 1 are arranged at adjacent positions.

As shown in FIG. 1, the connecting member 23
Have a length of L _{1 in the} perpendicular direction, and
4, 25, 26, and 27 are L on one side in the longitudinal direction, respectively.
₁ minute, has a total length of 2L ₁ minute on each side, the coupling member 2
5,26 is in the longitudinal direction and the perpendicular direction has a length of L ₁ minute. Length of the beam member 21 is L _2, 2L ₁ + L ₂
Corresponds to the dimension of the wife side which is the short side of the housing units 1A and 1B. The length of the beam member 22-1 is L _3,
2L ₁ + L ₃ corresponds to the dimension on the girder side which is the long side of the housing unit 1A. Further, the length of the beam member 22-2 is L ₄
And 2L ₁ + L ₄ corresponds to the dimension on the girder side which is the long side of the housing unit 1B. Also, the footing member 11,
The length of 12 is L ₅ together, L ₅ is 3L ₁ + L ₂ + L
Is the same as the _2/2, i.e. L ₅ represents has a length corresponding to 1.5 times the size of the gable of the housing unit 1.

As described above, the basic PC footing member 1 is formed.
0, footing members 11 and 12, beam members 21 and 22 as PC rising members 20, and connecting members 23 to 27.
Has a standardized predetermined length based on the dimensions of the housing unit 1.

In addition to the above, the footing members 11 and 12 have the same thickness dimension, and the beam members 21 and 22 and the connecting members 23 to
27 is the same height dimension.

The footing members 11 and 12, the beam members 21,
22, the connecting members 23 to 27 are made as PC blocks at a factory, and these are reinforced by reinforcing members buried inside.

Next, the construction work of the foundation will be described.
At the construction site where the unit house is to be built, the casting work and the excavation work are performed, and as shown in FIGS. Dripping.

As shown in FIG. 1, the footing members 11 and 11,
12 and 12 are placed in series, and these footing members are arranged with their ends provided with the recesses 37 as shown in FIG. Thereafter, the connecting plate 34 is placed in the recess 37, the bolt 35 is inserted into the hole 34A, and the nut 3 is inserted.
6, the footing members 11 and 11 and 12 and 12 are connected by the connecting plate 34. Next, the mortar 54 is filled on the connecting plate 34 as shown in FIG.

After the plurality of footing members are connected in series as described above, the height level adjusting bolt 32 shown in FIG. 12 is screwed into the nut 33 shown in FIGS. The lower end male thread of the reinforcing bar 30 of FIG. 12 is screwed into the nut 31 indicated by 3 and the reinforcing bar 30 is connected to the footing member 1.
Stand on 1,12. Thereafter, the footing members 11, 1
The connection members 23 to 27 are disposed at predetermined positions based on the shape of the connection in the upper part of the second member 2.
Height adjustment bolt 32 while inserting reinforcement 30
Put on top. By adjusting the amount of protrusion from the footing members 11 and 12 by rotating the bolt 32, the height levels of the connecting members 23 to 27 are made the same.

Thereafter, the beam members 21 and 22 are arranged between the connecting members 23 to 27.
While the reinforcing bar 30 is inserted into the through hole 40 of the connecting member 2.
The beam members 21 and 22 are inserted into the grooves 42A of the female connector 42 of Nos. 3 to 27.
The projection 38A of the male connector 38 is inserted from above.
As described above, the convex step 47 is provided below the female connector 42 of the connecting members 23 to 27, while the concave step 41 is provided below the male connector 38 of the beam members 21 and 22. Since the convex step 47 and the concave step 41 are engaged with each other, both ends of the beam members 21 and 22 are connected to the connecting members 23 to 27.
While being supported on the footing members 11 and 12. Also, since the height of the concave step 41 and the height of the convex step 47 are the same B, the connecting members 23 to 27 and the beam members 21 and 22
Has the same height level as shown in FIG.

That is, according to the present embodiment, the height level adjusting bolt 32 may be provided only at the position where the connecting members 23 to 27 are disposed, and must be provided at the position where the beam members 21 and 22 are disposed. Since there are no such components, the number of parts and the number of work steps can be reduced accordingly.

After the above operation, a pin 55 is driven into the holes 43 and 39 of the female connector 42 and the male connector 38 in which the groove 42A and the projection 38A are engaged, as shown in FIG. Thus, the female connector 42 and the male connector 38 are connected, and the connecting members 23 to 27 and the beam members 21 and 22 are connected. For this reason, according to this embodiment, the connecting member 2 which forms the base PC standing part by the driving operation of the pin 55
3 to 27 and the beam members 21 and 22 can be easily connected, so that the operation time can be shortened and the operation can be simplified as compared with the connection operation using bolts and nuts.

According to the present embodiment, the connecting members 23 to
27 is provided at a position corresponding to the corner of the housing unit 1 as described above, and has a bottomed hole 45 into which an anchor bolt 44 extending from the housing unit 1 is inserted. Connecting members 23 to 27 serving as reference members and forming a base PC standing part
Of the beam members 21 and 22, the connection members 23 to 27, which are the position reference members, are first arranged above the footing members 11 and 12, and after that, the work of arranging the beam members 21 and 22 is performed. The raised part of the foundation formed by this method is of high accuracy because the arrangement position error is not accumulated as compared with a case where the connecting part and the beam member are alternately arranged one by one in order and the raised part is made.

When the above operation is completed, FIG.
As shown in FIG. 15, a gap 56 is formed between the footing members 11 and 12, the connecting members 23 to 27, and the beam members 21 and 22 by the height level adjusting bolt 32. In order to fill the gap 56 with the grout material 57, both ends of the gap 56 are closed with a sealing material 58, and then the upper end opening of a through hole 40 formed vertically through the connecting members 23 to 27 and the beam member 21. The grout material 57 is injected from the part. The injected grout material 57 surely flows down in the through hole 40 by gravity.
The gap 56 is filled and the through hole 40 is also filled.

For this reason, it is not necessary to perform the work of injecting the grout material 57 from the narrow side of the gap 56 in order to fill the gap 56 with the grout material 57, and the work of injecting the grout material 57 can be easily performed. The grouting material can be reliably filled into 56 using gravity, and the grouting material 57 is filled into the through holes 40 provided in the connecting members 23 to 27 and the beam member 21 for inserting the reinforcing bars 30. Work can be done at the same time.

When the grout material 57 solidifies, a foundation consisting of the lower wide footing portion formed by the footing members 11 and 12 and the vertically elongated rising portion formed by the connecting members 23 to 27 and the beam members 21 and 22 is completed. On this basis, the lengths L1, 2 of the connecting members 23 to 27 shown in FIG.
L1, the length L2 of the beam member 21 and the footing member 11, 1
2, the length of the connecting members 23, 24, 27
The connecting portion 59 between the beam member 21 and the footing member 11 is shifted from the connecting portion 60 between the footing members 11 and 12. That is, the connection portion 59 and the connection portion 60 do not match. For this reason, the connecting portion 59 is reinforced by the footing members 11 and 12, and the connecting portion 60 is reinforced by the beam member 21, so that the overall strength of the foundation is as large as required. further,
In addition to the fact that the connection portions 59 and 60 do not match, FIG.
As shown in (2), since the connecting portions of the housing units 1 placed on the rising member 20 are also shifted with respect to the connecting portions 59 and 60, the units that are easily concentrated on the connecting portions of the housing unit 1 The load of the house can be received at places other than the connection portions 59 and 60, and the support strength of the foundation for the unit house can be improved. Moreover, footing members
11, 12, and the connecting members 24, 27
The connection portions 59 and 60 and each connection portion of the housing unit 1
Not only are they shifted, but also the
The connecting members 24 and 27 on which the connecting portions are placed are connected to the footing portions.
A position where the connecting portions 60 between the members 11 and 12 are not straddled,
That is, it fits in one footing member 11 or 12.
Are arranged on the footing members 11 and 12 as described above.
To receive the load of a plurality of housing units 1 in a concentrated manner
The connecting members 24 and 27 are widened by the footing members 11 and 12.
It can be supported by a planar portion.
The load on the connecting portion 60 between the two can be reliably reduced.

The beam members 21 and 22 and the connecting members 23 to
Of the male connector 38 and the female connector 42 provided at these ends to connect the connector 27, one side surface of the female connector 42 is covered with a concrete covering 46 and connected to each other. Beam members 21 and 22 forming the outer contour of the foundation
In the connecting members 23 to 26, the covering portion 46 is on the outside of the house. Therefore, on the completed foundation, both the connecting members 38 and 42 are not exposed to the outside of the house as shown in FIG. Therefore, the metal fittings 38, 42 are not exposed to rain and wind, so that the durability of the fittings 38, 42 can be improved, and the metal fittings 38, 42 can be installed outside the house. Since it cannot be seen from the outside, the appearance of the foundation can be improved.

FIG. 15 shows a state in which the house unit 1 shown in FIG. 16 is mounted on a foundation to build a unit house.
After filling grout material into the bottomed holes 45 provided in the connecting members 23 to 27 arranged at positions corresponding to the corners of the housing unit 1, the housing is inserted while the anchor bolts 44 are inserted into the bottomed holes 45. Unit 1 is placed on the foundation with a crane. When the grout solidifies, the housing unit 1 is bonded to the foundation. FIG. 16 shows only the skeleton of the housing unit 1. The housing unit 1 is manufactured by attaching necessary equipment such as wall panels and floor panels and construction materials to the skeleton at a factory, and is then transported to a construction site. FIG.
4. Reference numeral 61 shown in FIG. 15 denotes soil that has been backfilled as a result of the root cutting operation.

The foundation shown in Figure 1 before and after the housing unit 1, was the basis for the two arranged on the left and right, the onset
The foundation of Ming may be a foundation in which three housing units 1 can be arranged in front, back, left and right, in such a case.
But, the number of used residential unit 1 can make working to standardize basic components the basis of different variety of unit housing, it is possible to reduce the kinds of basic components required, made PC of The type and number of molds for making the basic components can also be reduced.

Although the embodiment described above is a case where the building is a unit house, the present invention can be applied to the foundation of other buildings.

[0038]

According to the present invention, the connection between the PC footing members forming the base and the connection between the PC rising members are shifted from each other, so that the connection between the footing members is reinforced by the rising member. The connection between the rising members is reinforced with a footing member, so that even if the foundation is formed by connecting a number of foundation components, the overall strength of the foundation can be made as large as required.

[Brief description of the drawings]

FIG. 1 is an overall plan view of a foundation.

FIG. 2 is a plan view of a first footing member.

FIG. 3 is a plan view of a second footing member.

FIG. 4 is a perspective view of a first beam member.

FIG. 5 is a perspective view of a second beam member.

FIG. 6 is a perspective view of a first connecting member.

FIG. 7 is a perspective view of a second connecting member.

FIG. 8 is a perspective view of a third connecting member.

FIG. 9 is a perspective view of a fourth connecting member.

FIG. 10 is a perspective view of a fifth connecting member.

FIG. 11 is a perspective view showing a state where the footing members are connected to each other.

FIG. 12 is a perspective view showing a state in which a reinforcing bar is erected on the footing member.

FIG. 13 is a perspective view showing a state in which a beam member and a connecting member are connected.

FIG. 14 is a longitudinal sectional view of a foundation in a beam member.

FIG. 15 is a vertical sectional view of a foundation in a connecting member.

FIG. 16 is a perspective view showing a skeleton of a housing unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 PC footing member 11-13 Footing member 20 PC rising member 21,22 Beam member 23-27 Connecting member 30 Reinforcement bar 32 Height level adjusting bolt 38 which is a height level adjusting member 38 Male connector 40 Through hole 41 Recessed step part 42 Female connector 44 Anchor bolt as an anchor member 46 Concrete covering part 47 Convex step part 51 Ground 55 Pin 56 Gap 57 Grout material 59, 60 Connection part

Claims (1)

(57) [Claims] 1. A unit-type building comprising a precast concrete footing member and a precast concrete standing member disposed on the footing member and on which a box-shaped housing unit is placed. A foundation, wherein a plurality of the footing members are connected in series, a plurality of the rising members are also connected in series, and a plurality of the housing units are also connected in the horizontal direction, and a connection portion of the footing member. The connecting portion of the rising member and the connecting portion of the housing unit are shifted, and the housing units of the plurality of rising members are connected to each other.
The rising member on which the connecting portion is placed is the footing member.
A foundation for a building, wherein the foundation is located at a position where it does not straddle a connection part between the two .