JPH04343918A - Footing construction method for unit residence - Google Patents

Abstract

PURPOSE:To improve footing construction accuracy by forming the rising section of a footing made of pre-cast concrete(PC) and securing the position accuracy of rising members joined through a residence unit and anchor member which are element of a unit residence. CONSTITUTION:A unit residence is provided with beam members 21 and 22 and a joint arranged between a plurality of the beam members 21 and 22 to joint them as a rising member which is made of PC and is to be arranged on the top of a footing member 11 made of PC. Since the beam members are joined through the corner section and anchor member of a residence unit, arranging work of the joint member 23 which becomes position reference member is performed, and then the beam members 21 and 22 are arranged.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a precast concrete (PC) foundation for a unit house.

0002

[Background Art] Conventionally, foundations for houses have been made by pouring concrete inside foundation forms assembled at the construction site, but this cast-in-place concrete foundation requires a lot of effort and time. , Also, since the foundation cannot be made with high precision, the Utility Model Application Publication No. 1-61240 and the Utility Application Publication No. 1-141 are proposed to solve this problem.
843 etc. shows the basis of using PC blocks pre-manufactured at a factory.

[0003] Furthermore, in Japanese Utility Model Application No. 1-61242, the foundation is formed of a wide footing member at the lower part and a vertically elongated rising member at the upper part, and both the footing member and the rising member are made of PC. It is shown.

0004

[Problems to be Solved by the Invention] The foundation is formed in a planar shape corresponding to the lower part of the building.
For foundations made of PC footing members and PC standing members, it is difficult to manufacture long footing members and standing members in a factory and transport them to the construction site.
These footing members and standing members can be manufactured in a factory and have relatively short lengths that can be transported to a construction site, and a foundation is created by connecting multiple footing members and standing members in series at the construction site. become.

[0005] When the foundation is formed in this way, in a unit house, the housing unit, which is a component of the house, and the standing member of the foundation are connected by an anchor member, so that the standing member is located at the location of the housing unit. shall be located with a high degree of positional accuracy that is compatible with the If a plurality of stand-up members connected in series are simply arranged and connected in sequence, positional errors will accumulate and the required positional accuracy cannot be obtained.

[0006] An object of the present invention is to form a foundation by connecting a plurality of standing members in series, which are connected to a housing unit that is a component of a unit house via an anchor member, to form a foundation standing part. An object of the present invention is to provide a foundation construction method for a unit house, which can ensure the positional accuracy of upper members and improve the construction accuracy of the foundation.

[0007]

[Means for Solving the Problems] The present invention provides a PC upright member disposed on the upper part of a PC footing member, which includes a linearly extending beam member and a plurality of beam members disposed between these beam members. and a connecting member that is connected to the corner part of the housing unit, which is a component of the unit house, via an anchor member. After the footing member is placed on the ground, the connecting member is placed at a predetermined position above the footing member. After that, the beam member is placed on top of the footing member and connected to the connecting member.

[0008]

[Operation] The connecting member is a position reference member that is connected to the corner part of the housing unit via an anchor member.This position reference member is placed first, and then the beam members are placed, so the completed foundation is The rising part does not have accumulated positional errors and is highly accurate.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS 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 this embodiment, and this foundation is for a unit house. In Figure 1,
A housing unit 1, which is a component of a unit house, is shown by a two-dot chain line, and there are two types of housing units 1, 1A and 1B, which have different lengths. The foundation is formed by a PC footing member 10 and a PC footing member 20, the footing member 10 has footing members 11 and 12 shown in FIGS. 2 and 3, and the upright member 20 has 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 arranged between these beam members 21 and 22 to connect them. be. As shown in FIG. 1, the beam member 22 includes housing units 1A and 1B.
There are two types of lengths 22-1 and 22-2 with corresponding lengths.

In FIG. 1, there are four footing members 11, two footing members 12, nine beam members 21, and beam members 22.
-1 has 2 pieces, beam member 22-2 has 2 pieces, and connecting member 23 has 4 pieces.
Four connecting members 24, one connecting member 25, one connecting member 26, and two connecting members 27 are used. These members have standardized predetermined lengths based on the module, which is the standard dimension of the housing unit 1, and the footing members 11 and 12 form a footing portion with a three-dimensional shape in plan, and the beam members 21, 22 and connecting member 23
.about.27 forms a raised portion in the shape of a Japanese character in plan view, which is placed above the footing portion. Connecting member 23-2
The position where 7 is placed corresponds to the corner portion of the housing unit 1.

In FIG. 2, the footing member 11 includes:
A nut 31 for screwing in the lower end male threaded portion of the reinforcing bar 30 shown in FIG.
A nut 33 for screwing in a height level adjustment bolt 32, which is a height level adjustment member shown in FIG. 12, is embedded in the position where the height level adjustment member shown in FIG. Furthermore, a nut 36 for screwing in the 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. It is provided in a recessed portion 37 that is deeper than the thickness.

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

The beam member 21 shown in FIG. 4 is provided with metal connectors 38 at both ends of the main body 21A, and the connectors 38 are male connectors having protrusions 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 set. A metal cylindrical member (sheath pipe) may be provided in this through hole 40. The male connector 38 is connected to the main body 2
It is not arranged at the center in the thickness direction of 1A, but is shifted by A from the center in the thickness direction. In addition, the protrusion 3 of the male connector 38
The lower end of 8A is located above the lower end of base portion 38B by a distance of B, and therefore, a recessed step portion 41 is provided at the lower portion of male connector 38.

Male connectors 38 are also provided at both ends of the main body 22A of the beam member 22 shown in FIG. Also, the through hole 40 is not provided.

The main body 23A of the connecting member 23 shown in FIG. 6 has an L-shaped planar shape with extending portions 23B and 23C extending perpendicularly to each other, and metal connectors are attached to the tips of these extending portions 23B and 23C. 42 are provided. This connector 42
is a female connector having a groove 42A into which the protrusion 38A of the male connector 38 can be vertically inserted and engaged. A hole 43 into which a pin is driven is formed in the female connector 42. Main body 2
3A is provided with a through hole 40 for inserting the reinforcing bar 30 like the connecting member 21, and an unarbolt 4 which is an anchor member of the housing unit 1 shown in FIG.
A bottomed hole 45 for inserting a hole 4 is also provided. A metal cylindrical member (sheath pipe) may be provided in the bottomed hole 45. The female connector 42 is not arranged at the center in the thickness direction of the extension parts 23B and 23C, but is shifted by an amount A toward the inside of the house from the center in the thickness direction. The side surface of the female connector 42 on the outside of the house is covered with a concrete covering section 46 that extends continuously from the extension sections 23B and 23C, and this side surface is not exposed to the outside. The groove 42A 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 remaining by a distance B, so that a convex stepped portion 47 is provided at the bottom of the female connector 42. .

The main body 24A of the connecting member 24 shown in FIG. 7 has a bulging portion 24B that bulges toward the inside of the house, and extending portions 24C and 24D that extend 180 degrees opposite each other.
Female connectors 42 are provided at the tips of 4C and 24D. A through hole 40 and a bottomed hole 45 are formed in the main body 24A, and since this connecting member 24 is arranged in a position where two housing units 1 are adjacent to each other, the bottomed hole 45 is formed in which the anchor bolt 44 is inserted. There are two.

The main body 25A of the connecting member 25 in FIG. 8 has a T-shaped planar shape having an extending portion 25B extending inside the house and extending portions 25C and 25D extending 180 degrees opposite each other. Female connectors 42 are provided at the tips of 25B, 25C, and 25D. There is a through hole 4 in the main body 25A.
0 and a bottomed hole 45 are formed, and two bottomed holes 45 are provided.

The connecting member 26 in FIG. 9 is basically the same in shape and structure as the connecting member 25 in FIG. 8, and has a main body 26A.
has a T-shaped planar shape with extensions 26B, 26C, and 26D, and female connectors 42 are provided at the tips of these extensions 26B, 26C, and 26D. However, the female connector 42 on the extending portion 26B is shifted by A in the opposite direction from the female connector 42 on the extending portion 25B of the connecting member 25. The reason for this is that when the connecting members 26 and 25 are arranged with the extending parts 26B and 25B facing each other, these extending parts 25B
, 26B can be connected to each other by the beam member 21 in FIG. 4 or the like.

Main body 27A of connecting member 27 shown in FIG.
has bulging portions 27B and 27C that bulge on both sides in the thickness direction, and has extension portions 27D and 27E that extend 180 degrees opposite each other, and these extension portions 27D and 27E.
A female connector 42 is provided at the tip. A through hole 40 and a bottomed hole 45 are formed in the main body 27A, and this connecting member 2
Since the four housing units 1 are arranged adjacent to each other, four bottomed holes 45 are provided.

As shown in FIG. 1, the connecting member 23
have a length of L1 in the perpendicular direction, and the connecting members 24, 25, 26, 27 each have a length of L1 on one side in the longitudinal direction.
, and has a total length of 2L1 on both sides, and the connecting members 25 and 26 have a length of L1 in a direction perpendicular to this longitudinal direction. The length of the beam member 21 is L2, and 2L1
+L2 corresponds to the dimension of the gable side, which is the short side, of the housing units 1A and 1B. Also, the length of the beam member 22-1 is L3
2L1 +L3 corresponds to the dimension of the girder side which is the long side of the housing unit 1A. Furthermore, the beam member 22-
The length of 2 is L4, and 2L1 +L4 corresponds to the dimension of the girder side which is the long side of the housing unit 1B. Also,
The lengths of the footing members 11 and 12 are both L5,
L5 is the same as 3L1 +L2 +L2 /2,
In other words, L5 is 1.5 of the gable side dimension of housing unit 1.
The length corresponds to the double.

In this way, the basic PC footing member 1
The footing members 11 and 12 which are 0, the beam members 21 and 22 which are the PC standing member 20, and the connecting members 23 to 27 have a standardized predetermined length based on the dimensions of the housing unit 1. There is.

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 has the same height dimension.

Footing members 11, 12, beam member 21,
22. The connecting members 23 to 27 are manufactured as PC blocks in a factory, and are reinforced with reinforcement material buried inside.

Next, the construction work of the foundation will be explained. At the construction site where a unit house is to be built, excavation work and root cutting work are carried out, and as shown in Figs. 14 and 15, chestnut stone 52 is laid on the cut ground 51, and on top of this, concrete 53 is poured. dripping

At predetermined positions on the sacrificial concrete 53, footing members 11 and 11, as shown in FIG.
12 and 12 are placed in series, and these footing members are placed so that the ends provided with the recessed portions 37 are butted against each other, as shown in FIG. After this, the connecting plate 34 is placed in the recessed part 37, the bolt 35 is inserted into the hole 34A, and the nut 3
6, the footing members 11 and 11 and 12 and 12 are connected by the connecting plate 34. Next, the connecting plate 34 is filled with mortar 54 as shown in FIG.

After connecting the plurality of footing members in series as described above, the height level adjustment bolt 32 shown in FIG. 12 is screwed into the nut 33 shown in FIGS.
, the lower end male threaded portion of the reinforcing bar 30 shown in FIG. 12 is screwed into the nut 31 shown in FIG.
It will be erected on 12th. Thereafter, the connecting members 23 to 27 are arranged at predetermined positions based on the shape of the footing members 11 and 12, and the connecting members 23 to 27 are adjusted to the height level while reinforcing bars 30 are inserted into the through holes 40. It is placed on the adjustment bolt 32. By rotating this bolt 32 and adjusting the amount of protrusion from the footing members 11 and 12, the height levels of the respective connecting members 23 to 27 are made the same.

After this, the beam members 21 and 22 are placed between the connecting members 23 to 27, and this placement work is performed by placing the beam members 21 and 22 between the connecting members 23 to 27
While inserting the reinforcing bar 30 into the through hole 40 of the connecting member 2
Beam members 21 and 22 are inserted into the grooves 42A of the female connectors 42 of No. 3 to 27.
This is done by inserting the protrusion 38A of the male connector 38 from above. The convex step portions 47 are provided at the lower portions of the female connectors 42 of the connecting members 23 to 27 as described above, while the recessed step portions 41 are provided at the lower portions of the male connectors 38 of the beam members 21 and 22 as described above. Therefore, by engaging the convex step portion 47 and the concave step portion 41, the beam members 21 and 22 have both ends connected to the connecting members 23 to 27.
It is placed on the footing members 11 and 12 while being supported by the footing members 11 and 12. Moreover, since the height dimension of the concave step part 41 and the convex step part 47 is the same B, the connecting members 23 to 27 and the beam members 21, 22
The height levels of , as shown in FIG. 13, naturally match.

That is, according to this embodiment, the height level adjustment bolts 32 need only be provided at the locations where the connecting members 23 to 27 are arranged, and need not be provided at the locations where the beam members 21 and 22 are arranged. Since there are no parts, it is possible to reduce the number of parts and work hours accordingly.

After the above operations, the 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 protrusion 38A are engaged, as shown in FIG. 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. Therefore, according to this embodiment, the connecting member 23 forming the basic PC upright part by driving the pin 55
27 and the beam members 21, 22 can be easily connected, and compared to the connection work using bolts and nuts, the work time can be shortened and the work can be simplified.

Furthermore, according to this embodiment, the connecting members 23 to
27 is arranged at a position corresponding to the corner of the housing unit 1 as described above, and has a bottomed hole 45 into which the anchor bolt 44 extending from the housing unit 1 is inserted, so these connecting members 23 to 27 are arranged at a position corresponding to the corner part of the housing unit 1. Among the connecting members 23 to 27 and the beam members 21 and 22, which serve as reference members and form the PC raised part of the foundation, the connecting members 23 to 27, which are position reference members, are placed on top of the footing members 11 and 12. Since the beam members 21 and 22 were placed first and then the beam members 21 and 22 were placed, the rising part of the foundation that was created was created by placing the connecting members and beam members one by one in turn. Compared to the case, the placement position errors are not accumulated, resulting in higher accuracy.

[0031] When the above work is completed, the screen shown in Fig. 14,
As shown in FIG. 15, a gap 56 is created between the footing members 11 and 12, the connecting members 23 to 27, and the beam members 21 and 22 due to the height level adjustment bolt 32. In order to fill this gap 56 with a grout material 57, after closing both sides of the gap 56 with a sealing material 58, the upper end opening of the through hole 40 is formed to vertically penetrate through the connecting members 23 to 27 and the beam member 21. Grout material 57 is injected from the section. The injected grout material 57 flows down inside the through hole 40 reliably by gravity,
It fills the gap 56 and also fills the through hole 40.

Therefore, in order to fill the gap 56 with the grout 57, there is no need to inject the grout 57 from the narrow side of the gap 56, and the grout 57 can be easily poured. 56 can be reliably filled with the grout material using gravity, and the grout material 57 can be 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 a lower wide footing portion formed by the footing members 11 and 12 and an upper vertically elongated raised portion formed by the connecting members 23 to 27 and the beam members 21 and 22 is completed. In this foundation, each length 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
, 12, the connecting members 23, 24
, 27 and the beam member 21 are connected to the footing member 1.
This results in deviation from the connection portion 60 between 1 and 12. That is, the connecting portion 59 and the connecting portion 60 do not match. For this purpose, the connecting part 59 is reinforced with the footing members 11, 12, and the connecting part 60 is reinforced with the beam member 21, so that the overall strength of the foundation is as large as required.

[0034] Also, the beam members 21, 22 and the connecting members 23~
A male connector 38 and a female connector 42 are provided at the ends of the connectors 27 and 27, and one side of the female connector 42 is covered with a concrete cover 46 to connect them to each other. Beam members 21 and 22 that formed the outer contour of the foundation,
Since the covering portion 46 of the connecting members 23 to 26 is on the outside of the house, in the completed foundation, both connectors 38 and 42 are not exposed on the outside of the house, as shown in FIG. 13. Therefore, the metal connectors 38, 42 are not exposed to rain and wind, and therefore the durability of the connectors 38, 42 can be improved. Since it is not visible from the outside, the appearance of the foundation can be improved.

FIG. 15 shows a state in which a housing unit 1 shown in FIG. 16 is placed on a foundation to build a housing unit. After filling the bottomed holes 45 provided in the connecting members 23 to 27 located at positions corresponding to the corners of the housing unit 1 with grout, the anchor bolts 44 are inserted into the bottomed holes 45 while the housing unit 1 is closed. Place unit 1 on the foundation using a crane. Once the grout solidifies, the housing unit 1 is connected to the foundation. FIG. 16 shows only the frame of the housing unit 1. The housing unit 1 is manufactured in a factory by attaching necessary equipment such as wall panels and floor panels, and fixtures to this frame, and then transported to the construction site. Furthermore, Figure 14
, 61 shown in FIG. 15 is the soil that was generated during the root cutting work and was backfilled.

The foundation shown in FIG. 1 was a foundation for arranging two housing units 1 on the front, back, left and right sides, but the foundation shown in FIG.
The foundation is such that three housing units 1 can be placed on each side, front and rear, and left and right. The length L6 of this foundation is L
The footing members 11, 12 described above, except for the newly added footing member 13 which is 2 + 2L1.
It is made using beam members 21, 22 and connecting members 23-27. As mentioned above, these have a predetermined length that is standardized based on the dimensions of the housing unit 1, so the foundations of various unit houses that use different numbers of housing units 1 are made by standardizing the basic components. can reduce the types of foundation components required, and
It is also possible to reduce the types and number of molds used to make these basic structural members made of PC.

In the embodiment described above, the bottomed hole 45 is filled with the grout material of the connecting members 23 to 27, which are the upright members of the foundation.
Although the connecting members 23 to 27 and the housing unit 1 are connected by inserting the anchor bolts 44 of the housing unit 1 into the housing unit 1, it is also possible to connect the housing unit 1 with the anchor bolts by erecting the anchor bolts on the connecting members. It is also possible to connect the members.

[0038]

Effects of the Invention According to the present invention, among the beam members and the connecting members that are the erecting members of the foundation, the connecting members that are the position reference members because they are connected to the housing unit via the anchor members are placed first. Place it on top of the footing member and then
Since the beam member placement work is performed, connection members and beam members will not be placed with cumulative positional errors.
For this reason, it is possible to achieve high precision in the foundation upright part, making it possible to achieve a high level of foundation construction accuracy.

[Brief explanation of drawings]

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

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

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

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

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

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

FIG. 7 is a perspective view of the 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 in which footing members are connected to each other.

FIG. 12 is a perspective view showing a state in which reinforcing bars are 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 vertical cross-sectional view of the foundation in the beam member.

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

FIG. 16 is a perspective view showing the frame of the housing unit.

17 is an overall plan view showing a foundation different from the foundation in FIG. 1. FIG.

[Explanation of symbols]

10 Footing members 11 to 13 made of PC Footing member 20 Standing members 21 and 22 made of PC Beam members 23 to 27 Connection member 30 Reinforcement bar 32 Height level adjustment bolt 38 which is a height level adjustment member Male connector 40 Through hole 41 Recessed step portion 42 Female connector 44 Anchor bolt 46 as an anchor member Concrete covering portion 47 Convex step portion 51 Ground 55 Pin 56 Gap 57 Grout material 59, 60 Connection portion

Claims (1)

[Claims] 1. A precast concrete upright member placed on top of a precast concrete footing member includes a beam member extending linearly, and a beam member placed between a plurality of said beam members to connect these beam members to each other. There is a connecting member that is connected to a corner part of a housing unit that is a component of a unit house via an anchor member, and after the footing member is laid on the ground, the connecting member is connected to the corner part of the housing unit that is a component of the unit house. Place it in place at the top of the
A method for constructing a foundation for a unit house, wherein the beam member is then placed on top of the footing member and connected to the connecting member.