JP2709551B2 - Prefabricated foundation member and its construction method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prefabricated foundation member and a construction method for forming a foundation of a building using the prefabricated foundation member.

[0002]

2. Description of the Related Art In conventional buildings such as houses, it is common to use a cloth foundation in which a foundation rising portion is formed on a foundation footing.
In many cases, a concrete is cast on the entire surface surrounded by a cloth foundation.

[0003]

However, when this solid foundation is constructed, an operation for forming a surrounding cloth foundation is first required. In order to construct the rising portion of the cloth foundation, it is necessary to assemble the formwork and remove the formwork after casting and hardening the concrete, which makes the work complicated and takes a long time. I was An object of the present invention is to provide a prefabricated foundation member capable of solving such a conventional problem and a method for constructing the prefabricated foundation member.

[0004]

In order to achieve the above object, in a prefabricated foundation member according to the present invention, a prefabricated base is formed in advance into a quadrangular prism shape having a predetermined foundation height and a predetermined length. Are formed with insertion holes for the joining bands, and first fitting holes for the round bars for joining are respectively formed on the end faces of both ends.

[0005] The insertion hole and the first fitting hole are formed at upper and lower positions, respectively, at two different heights.
It is preferable that a second fitting hole having the same diameter is formed at the same height position as the first fitting hole on both side surfaces.

In order to achieve the above object, in a method for constructing a prefabricated foundation member according to the present invention, the prefabricated foundation member has a predetermined foundation height, is formed in advance into a quadrangular prism shape having a predetermined length, and is formed on both side surfaces. The insertion holes of the joining bands are upper and lower 2
The first fitting holes of the round bar for joining are respectively formed at two upper and lower portions on the end surfaces of both ends, and the second fitting holes of the same diameter are formed on the side surfaces of both ends at the same height position as the first fitting holes. A predetermined number of prefabricated base members having two upper and lower fitting holes are formed.
In the straight portion, a joining round bar is fitted in the first fitting holes of the adjacent prefabricated foundation members and connected horizontally, and a joining band is inserted through the pair of opposed insertion holes. In the corner portion, the second fitting hole formed on the side surface at one end of a pair of prefabricated foundation members installed at right angles. The connecting round bar is fitted horizontally toward the first fitting hole formed on the end face of the other prefabricated base member,
A joining band is inserted and connected to the pair of opposed insertion holes, tightened and integrated via auxiliary wood, and then concrete is cast and hardened on a portion defined by each prefabricated foundation member. It is characterized by forming the foundation of a building.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an embodiment of the present invention. In the drawings, reference numeral 1 denotes a prefabricated base member according to the present embodiment. As shown in FIG. 1, the prefabricated base member 1 has a predetermined base height H and a predetermined thickness W, and is formed in advance into a quadrangular prism shape having a predetermined length L. For the length L, several lengths are prepared in advance,
These are used in combination.

In this embodiment, the prefabricated base member 1 is
It is made of a concrete material. In this case, the base thickness W may be about 5 cm. As for the material, hard EPS (Expanding polyester) or the like can be used in addition to this.

On both side surfaces of the prefabricated base member 1,
Two insertion holes 2 for a bonding band, which will be described later, are formed in two places at the top and bottom. In addition, first fitting holes 3 of a round bar for connection, which will be described later, are formed at two locations on the end surfaces of both ends of the prefabricated base member 1. Each of the insertion holes 2 and each of the first fitting holes 3 are formed so that their height positions are shifted from each other. A second fitting hole 4 having the same diameter as the first fitting hole 3 is formed on both end side surfaces of the prefabricated base member 1 at a position closer to the end than the insertion hole 2 and at the same height as the first fitting hole 3. I have.

Next, a construction procedure for constructing a foundation of a building using the prefabricated foundation member 1 having such a configuration will be described. FIG. 2 is a schematic diagram of a smaller scale than the actual one for convenience of explanation of the construction procedure.
As a construction procedure, first, a predetermined number of prefabricated foundation members 1 are set on a foundation footing (not shown).
The foundation footing is formed in advance at the position where each prefabricated foundation member 1 is to be installed in FIG.

In the straight section, each prefabricated base member 1 firstly adjoins the first prefabricated base member 1, 1
The round bar 5 for joining is fitted in the fitting hole 3 and connected horizontally. In order to accurately maintain the horizontal position of each prefabricated foundation member 1, a wedge-shaped packing material (not shown) is used to drive the prefabricated foundation member 1 into a predetermined position on the bottom surface of the prefabricated foundation member 1 to adjust the horizontal accuracy.

Thereafter, as shown in the figure, a joining band 6 is inserted between the pair of opposed through holes 2 and 2 of the end portion of the prefabricated base member 1 and connected to each other. Become As the bonding band 6, a well-known off-the-shelf product, such as a resin or metal band for packing, can be used, and it is sufficient to tighten with a commercially available tightening tool for the bonding band 6.

Next, in the corner portion, as shown in FIG. 2, a pair of prefabricated foundation members 1,
1 from the second fitting hole 4 formed on the side surface of the end of one prefabricated base member 1 to the first fitting hole 3 formed on the end surface of the end of the other prefabricated base member 1. The rod 5 is fitted and connected horizontally, and is driven into a predetermined position on the bottom surface of the prefabricated base member 1 using the same wedge-shaped packing material as described above to adjust the horizontal accuracy. Next, the joining band 6 is inserted and connected between the pair of opposed insertion holes 2, 2, and tightened via the auxiliary wood 7 to be integrated.

In this way, as shown in FIG. 2, each prefabricated base member 1 is connected and arranged on the outer peripheral portion, and then a concrete is cast and hardened on the portion defined by each prefabricated base member 1. Form the basis Before the concrete is cast on the solid base portion 8, anchor bolts and various pipes are arranged at predetermined positions, and a part or all of them are embedded in the concrete.

In this embodiment constructed as described above, the prefabricated foundation member 1 arranged on the outer peripheral portion can be used as a formwork, and a concrete for a solid foundation can be cast. After the formation, the prefabricated base member 1 can be used as a part of the prefabricated base member 1 as it is, so that the work of removing the formwork as in the related art becomes unnecessary, and the construction period can be shortened.

Further, the connection of the prefabricated foundation members 1 can be performed only by the joining round bar 5 and the joining band 6, and since the constituent members are simple and the joining method is also simple, the prefabricated foundation members 1 can be connected even if they are not skilled workers. Can be done easily.

The present invention is not limited to the above embodiment, and the number of insertion holes 2 and fitting holes 3 and their formation positions can be freely set according to design conditions.
It goes without saying that various modifications can be made without departing from the scope of the present invention.

[0018]

The present invention is configured as described above,
The following effects can be obtained. (1) The prefabricated foundation member can be used instead of the formwork, and the work of removing the formwork is not required, so that the construction period can be shortened. (2) Prefabricated foundation members can be connected to each other only with round bars and bands, and the components are simple and the joining method is simple. Can be.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a configuration of a prefabricated base member according to one embodiment of the present invention.

FIG. 2 is an explanatory view showing a joining mode of a prefabricated base member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Prefab foundation member 2 Insertion hole 3 1st fitting hole 4 2nd fitting hole 5 Round bar for joining 6 Joining band 7 Auxiliary wood 8 Solid foundation

Claims (4)

(57) [Claims] 1. A square pillar having a predetermined base height and a predetermined length is formed in advance, and a through hole for a bonding band is formed at each side surface of both ends, and a round bar for bonding is formed at each end surface of both ends. A prefabricated base member having a first fitting hole formed therein. 2. The prefabricated base member according to claim 1, wherein said insertion hole and said first fitting hole are formed at two positions, each being vertically shifted from each other. 3. A second fitting hole having the same diameter as that of the first fitting hole is formed on both side surfaces of the both ends.
A prefabricated base member as described. 4. A square pillar having a predetermined base height and a predetermined length is formed in advance, and two through holes are respectively formed at upper and lower sides of both end side surfaces, and are respectively connected to both end end surfaces. The first fitting hole of the round bar is formed at two upper and lower positions, and the second fitting hole having the same diameter is formed at the same height position at the upper and lower sides at both ends. A predetermined number of prefabricated foundation members are placed on a predetermined number of foundation footings, and in a straight portion, connecting round bars are fitted in the first fitting holes of the adjacent prefabricated foundation members to be horizontally connected and opposed. A joining band is inserted into and connected to the pair of insertion holes, tightened and integrated through auxiliary wood, and at a corner portion, a side surface of one end of a pair of prefabricated foundation members installed orthogonally. Formed on the end face of the other prefabricated foundation member from the second fitting hole formed in A round bar for joining is fitted to one fitting hole and connected horizontally, and a joining band is inserted and connected to the pair of opposed through holes, which are tightened and integrated via auxiliary wood. A method for constructing a prefabricated foundation member, characterized by forming a foundation of a building by casting and hardening a concrete on a portion defined by each prefabricated foundation member.