JP2002188156A - Foundation and its execution method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an execution technique improving the durability of a building. SOLUTION: This foundation for supporting the building comprises a frame arranged along the portion where the foundation is to be executed, anchor bolts fitted to the frame and having upper end sections formed with screw grooves, and a concrete body enclosing the frame. Each anchor bolt is extended in the vertical direction, and its upper end section is protruded upward from the concrete body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to the foundation of buildings. More particularly, the present invention relates to a foundation which is easy to construct and enables construction of a building having excellent earthquake resistance.

[0002]

2. Description of the Related Art Conventionally, various construction methods have been proposed to improve the durability of buildings.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a foundation which is excellent in earthquake resistance and can be easily constructed by using a novel foundation construction technique.

[0004]

The inventors of the present invention have conducted various studies to solve the above-mentioned problems, and as a result, have found that a base for supporting a building and which is to be constructed along a portion where the foundation is to be constructed. The frame includes an arranged skeleton, an anchor bolt having a threaded upper end attached to the skeleton, and a concrete body including the skeleton, wherein the anchor bolt extends vertically. It has been found that the upper end can be solved by providing a foundation characterized by projecting upward from the concrete body. Hereinafter, the present invention will be described in detail.

FIG. 1 is a perspective view of a foundation according to an embodiment of the present invention, FIG. 2 is a top view of the foundation shown in FIG. 1, and FIG. 3 is a side view of the upper part of the foundation shown in FIG. FIG. 4 is a side view of the lower portion of the foundation shown in FIG.

[0006] In the construction of this foundation, first, stones 2 (usually called "cobble stones") are laid on the ground at the place where the building is to be constructed, and a concrete layer 3 is formed thereon (usually, It is called "abandoned con",
In the present invention, this is referred to as a “pedestal concrete layer”).
It is preferable that the cobblestone 2 and the pedestal concrete layer 3 are formed so as to cover the entire lower surface of the building to be constructed.

[0007] A jack 4 is arranged so as to be able to expand and contract up and down along the part on which the foundation on the pedestal concrete layer 3 is to be constructed. A predetermined number of the jacks are arranged at regular intervals, and the intervals and the number are determined in consideration of the safe load strength of the jacks, the weight of the building, and the like. It should be noted that the jack 4 is secured by using bolts and pins.
Is attached to the pedestal concrete layer 3. The jack comprises a lower base 41, a screw rod 42 and an upper base 43, as shown in detail in FIG. Screw rod 42
Is attached to the lower base 41, and the upper base 4
3 has a hole 44 in which a thread groove is formed on the inside, and this thread groove is adapted to engage with the thread of the threaded rod 42. A frame described below is attached to the upper stand 43. Therefore, by rotating the screw rod 42, the upper base 43 is moved up and down, so that the height of the frame attached to the upper base 43 can be arbitrarily finely adjusted.

[0008] A skeleton 5 made of a reinforcing bar is arranged on the jack 4 arranged along the portion where the foundation is to be constructed as described above, and the skeleton 5 is attached to the upper base 43 of the jack 4. An anchor bolt 6 is attached to the skeleton 5. The anchor bolt 6 has a thread groove 7 formed at the upper end thereof, and the lower end thereof is bent at a right angle to improve the jointability with the concrete body.

The above-mentioned skeleton 5 is attached to the side of the first skeleton 5 'made of a reinforcing bar arranged so as to extend in the vertical direction with a space therebetween, and is spaced apart from each other by a predetermined distance. Frame 5 "comprising a plurality of rebars 5" arranged so as to extend in the horizontal direction, and a pair of angle members 9 and 10, which are joined so as to sandwich the upper end of the first frame 5 '. And a lower mounting member 8 "made of a pair of angle members 11 and 12 and joined together so as to sandwich the lower end of the first frame portion 5".
The first frame portion 5 'is formed so as to extend in the vertical direction along a portion where the foundation 1 is to be constructed, and forms a vertical plane.

Here, the angle members 9 to 12 are made of steel. A large number of holes 15 are formed in the angle material to improve the jointability with the concrete body. Each angle member is bent at a right angle so as to have two sides of equal length, as is apparent from FIG. 3 showing the case when viewed from the side. That is, the angle material includes a first side surface portion 32 that extends vertically from the first end portion 31 and a corner portion 33 that is bent at a right angle from the first side surface portion 32.
And a second side surface portion 34 extending horizontally from the corner portion 33 and extending to the second end portion 35. Each of the angle members constituting the upper mounting portion 8 'or the lower mounting portion 8 "is arranged in a symmetrical manner so that the first side surfaces 32 thereof face each other, and the reinforcing members are vertically arranged therebetween. The upper end or lower end of the first frame portion 5 ′ is joined and sandwiched.

A second frame portion 5 "in which a plurality of reinforcing bars are arranged in a horizontal direction is attached to the side surface of the first frame portion 5 ', but constitutes the second frame portion 5". The plurality of rebars are alternately joined at predetermined intervals on both sides of a vertical plane formed by the first skeleton 5 ′. The anchor bolts 6 are arranged between the reinforcing bars of the first frame portion 5 'so as to be parallel to the reinforcing bars constituting the first frame portion, that is, to be oriented in the vertical direction. It is joined to two rebars vertically adjacent to each other in the two frame portions 5 ″.

The method of joining the second frame 5 "to the first frame 5 'and the method of joining the anchor bolt 6 to the second frame 5" are not particularly limited, and may be welding, winding with a wire or wire. Conventionally known methods such as bonding with an adhesive can be arbitrarily adopted, but preferably these are joined by welding. By adopting the joining method by welding, the first skeleton 5 ′ and the second skeleton 5 ″,
In addition, since the second frame portion 5 "and the anchor bolt 6 can be firmly joined to each other, it is possible to construct a building having excellent durability and earthquake resistance.

The frame 5 is placed on the jack 4 as described above.
Is formed, the side surface of the skeleton 5 is surrounded by a plate (not shown), and then the concrete slurry is poured into the plate. The concrete slurry is poured such that the upper end of the anchor bolt 6 in which the thread groove 7 is formed projects upward. Thereafter, the concrete slurry is solidified to form a concrete body (not shown). After the concrete slurry is completely solidified to obtain a concrete body, the plate-like body is removed. An upper end portion of the anchor bolt projecting upward from the concrete body is used for joining with a building constructed thereon.

The anchor bolts 6 protruding from the concrete body of the foundation 1 formed as described above are firmly joined to the concrete body constituting the foundation and the skeleton contained therein, so that The building constructed on the building has better durability and earthquake resistance than the building constructed by the conventional construction method.

Second Embodiment FIG. 5 is a diagram showing an upper side surface of a foundation 1 'according to a second embodiment of the present invention. Unlike the foundation 1 of the first embodiment, the framework of the foundation 1 'according to the second embodiment is different from the foundation 1 of the first embodiment in that a plurality of reinforcing bars 51 arranged in parallel with the first framework portion 5' forming a vertical plane,
52 is attached to the second end portion 35 of the angle material, and a third frame portion 53 and a fourth frame portion 54 are formed on both sides of the first frame portion 5 ', so that more excellent durability is provided. The foundation can be made.

The distance between the first frame 5 'and the third frame 53 or the fourth frame 54 is determined by the angle of the second plane 3
By changing the width of 4, it can be arbitrarily adjusted.

Third Embodiment FIG. 6 shows a third embodiment of the present invention. In the third embodiment, a panel plate 61 is attached instead of the third frame portion 53 and the fourth frame portion 54 of the second embodiment. In the case of the third embodiment, the upper base 43 of the jack 4
The fittings 62- vertically fitted into the grooves formed in
Along with the panel plate 61 along 65, the wedge fittings 66 and 67 that penetrate the panel plate and are buried in the fixture are fitted.
The panel plate 61 is attached.

[Brief description of the drawings]

FIG. 1 is a perspective view of a foundation according to one embodiment of the present invention.

FIG. 2 is a top view of the foundation shown in FIG.

FIG. 3 is a side view of the upper part of the foundation shown in FIG. 1;

FIG. 4 is a side view of the lower part of the base shown in FIG. 1;

FIG. 5 is a diagram showing a second embodiment of the present invention.

FIG. 6 is a diagram showing a third embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 foundation 2 boring stone 3 pedestal concrete layer 4 jack 5 skeleton 6 anchor bolt

Claims (5)

[Claims] Claims 1. A foundation for supporting a building,
A skeleton arranged along the part where the foundation is to be constructed,
An anchor bolt attached to the framework and having a threaded upper end, and a concrete body including the framework, the anchor bolt extending in a vertical direction, and the upper end is formed of the concrete. A foundation characterized by projecting upward from the body. 2. The frame according to claim 1, wherein the frame includes a first frame portion including a plurality of reinforcing bars arranged to extend in a vertical direction with a gap therebetween, and a pair of angle members, and an upper end of the first frame portion. An upper mounting tool joined so as to sandwich the lower mounting tool, which is made of a pair of angle members, and is joined so as to sandwich the lower end of the first framing portion, A second frame portion formed of a plurality of rebars joined to the side surface and arranged to extend in the horizontal direction, wherein the first frame portion forms a vertical plane, and the second frame portion is formed of the vertical plane. The foundation according to claim 1, wherein the anchor bolts are alternately arranged on both sides, and the anchor bolts are arranged in the vertical plane and are joined to the second skeleton. 3. A pedestal concrete layer formed on the ground, and a jack mounted on the pedestal concrete layer so as to be able to expand and contract vertically, wherein the jack lifts the skeleton. A foundation according to claim 1 or 2, characterized in that: 4. The foundation according to claim 3, wherein the jack is attached to the lower fixture. 5. A method for constructing a foundation for supporting a building, the method comprising: arranging a frame along a portion where the foundation is to be constructed; and forming an anchor bolt having an upper end portion having a thread groove. Joining the frame, the step of pouring concrete slurry to include the frame, and the step of solidifying the concrete slurry, wherein the anchor bolt extends in the vertical direction, the anchor bolt of the A method of constructing a foundation, wherein an upper end protrudes upward from the concrete body.