JP3484478B2 - Assembling type precast concrete foundation 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 precast concrete foundation and its construction method. More specifically, the present invention relates to a precast concrete foundation that can be easily transported and installed and a method for constructing the foundation.

[0002]

2. Description of the Related Art Conventionally, as a basic block for a house, as shown in FIG. 13, a reverse portion in which a vertical portion a and a horizontal base portion b are integrally formed at the lower end of the vertical portion a is used. T
A letter-shaped precast concrete foundation block (hereinafter referred to as a PC foundation block) is used.

However, such an inverted T-shaped PC basic block has the following problems.

(1) Since the shape is an inverted T-shape, the work of assembling the reinforcing bar and the making of the formwork in the factory are complicated and the workability is poor.

(2) Since the shape is an inverted T-shape, a wide collection place is required for storage at the factory.

(3) Since the shape is the inverted T-shape, only about half of the weight of the truck is loaded during transportation, resulting in poor transportation efficiency and increased transportation costs.

(4) Since the shape is an inverted T-shape, the ground contact area of the base portion is large at the time of installation, and it is difficult to obtain horizontality.

(5) When packing is used to adjust the level of the base part, a gap is created between the base part and the discarded concrete, and the calculated yield strength cannot be realized.

(6) Since it is an integral type, it is heavy and it is difficult to repair the foundation.

In the separation type PC foundation block as shown in FIG. 14, most of the above problems can be solved because the vertical portion a and the base portion b are separated. When the part a is embedded and integrated in the base part b at the construction site, the work of providing the verticality and the work of passing straight through the street cause another problem that it is a very difficult work in construction.

[0011]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems of the prior art, and an object thereof is to provide a prefabricated PC base capable of simplifying the assembly work in a factory and a construction site. There is.

[0012]

The assembled PC foundation of the present invention comprises at least a pair of base member divided bodies arranged at predetermined intervals at a construction site and at least one vertical member mounted on the divided body. And a member on the upper surface of the divided body.
A female to which a joining reinforcing bar for joining the vertical members is screwed
The screw bodies are arranged substantially flush with each other, and both of the vertical members in the lateral direction are
A step is formed at the end for reinforcing the joining reinforcing bar,
The division body and the vertical member are integrated by an intermediate body formed between the division bodies at a construction site.

In the prefabricated PC foundation of the present invention, it is preferable that the intermediate body forming portion is provided on an end surface of the divided body and / or a lower end of the vertical member.

Here, the intermediate body forming portion formed on the opposing end faces of the divided body is, for example, a plurality of female screw bodies embedded in the end faces and one end of which is screwed into the female screw bodies to the outside. The intermediate member forming portion formed at the lower end of the vertical member is a substantially L-shaped auxiliary member that protrudes from the intermediate member corresponding position of the lower end for a predetermined distance. It is considered as a reinforcing bar.

[0015]

On the other hand, the construction method of the prefabricated PC foundation of the present invention is the prefabricated concrete of any of the above.
A method of constructing a foundation, comprising: disposing base member divided bodies at predetermined intervals; mounting a vertical member on the base member divided bodies; forming an intermediate body between the divided bodies; A step of integrating the divided body and the vertical member by a body.

In the method of constructing a prefabricated PC base according to the present invention, it is preferable that reinforcing bars are planted on the opposite end faces of the divided body, and that a vertical member is joined at a predetermined position on the upper surface of the divided body. Reinforcing bars are preferably implanted.

[0018]

Since the prefabricated PC foundation of the present invention is constructed as described above, the manufacturing process including the bar arrangement work at the time of manufacturing the vertical member and the base member divided body in the factory is simplified, and Since the vertical member and the base member divided body have a flat plate shape, storage efficiency and transportation efficiency are improved. Also, a base member divided body whose base part is manufactured in a factory,
Since it is composed of an intermediate body produced at the construction site, it is only necessary to adjust the level to the divided body, so that adjustment can be easily done and empty foundation mortar or discarded concrete of the foundation is divided into the divided bodies. Can be reduced only to the place where is laid. Further, since the vertical member is mounted on the level-adjusted base member divided body, the vertical degree of the vertical member can be easily obtained, the workability is good, and the position can be easily adjusted.

[0019]

Embodiments of the present invention will now be described with reference to the drawings, but the present invention is not limited to these embodiments.

FIG. 1 is an overall perspective view of an assembled PC foundation according to an embodiment of the present invention, FIG. 2 is a plan view of one of the divided base members, FIG. 3 is the same front view, and FIG. 4 is a front view of a vertical member. 5 shows the same side view. In the figure, 10 is a base portion, 20 is a vertical portion, and B is a prefabricated PC foundation.

As shown in FIG. 1, an assembled PC foundation B according to the first embodiment of the present invention includes at least a pair of base member divided bodies 11 and 11 arranged at a predetermined interval,
At least one vertical member 21 mounted on it and the intermediate body 1 formed at the construction site between the two divided bodies 11, 11.
2 and 2 as main components, and divided bodies 11, 1
1 and the vertical member 21 are integrated by the intermediate body 12. Here, the base portion 10 is composed of the two divided bodies 11, 11 and the intermediate body 12.

The base member divided body 11 is shown in FIGS.
As shown in (1), the reinforcing bars 13 and 14 are laid in the horizontal and vertical directions, and then concrete is poured and molded to form a flat plate. High nuts (female screw bodies) 15 and 15 are attached to both ends of the reinforcing bar 13 in the lateral direction (direction parallel to the mounted vertical member 21). The end surface of the female screw body 15 that is desired outward is substantially flush with the end surface of the base member divided body 11. At the construction site, a rebar 16 for an intermediate body, which has an external thread 16a to be screwed with this female thread, is screwed onto the female screw body 15 at the construction site to form the intermediate body 12.

Further, a female screw body 17 is fixed upward at the central portion of the lateral reinforcing bar 13B. The end surface of the female screw body 17 which is viewed upward is substantially flush with the upper surfaces of the base member divided bodies 11, 11. At the construction site, a connecting rebar 18 having a male screw 18a for screwing with the female screw is formed on the end of the female screw body 17 for joining with the vertical member 21 at the construction site. The female screw body 17 is attached at a position where one can be joined to the vertical member 21 mounted on the split bodies 11 and 11, and the other can be joined to a vertical member that is connected to the vertical member 21. (See FIG. 4).

As shown in FIGS. 4 and 5, the vertical member 21 includes reinforcing bars 22, 2 in the horizontal direction and the vertical direction (vertical direction).
After arranging No. 3, it is a flat plate-like one formed by pouring and molding concrete. The vertical member 21 is mounted on the divided bodies 11, 11 to form the vertical portion 20 of the foundation B. In addition, both lateral end portions 21 of the vertical member 21.
As shown in FIG. 1, a and 21a are cut out to form a step 2
4 are provided. The above-described joining reinforcing bar 18 is arranged on one of the steps 24.

Further, the intermediate member 12 is connected to the vertical reinforcing bar 23.
The objects 23B and 23C located at positions corresponding to are protruded downward in a substantially L shape, and the auxiliary rebar 25 of the intermediate body 12
It is said that. The protruding length is such that the bottom of the reinforcing bar 25a corresponding to, for example, an L-shaped horizontal portion contacts the intermediate reinforcing bar 16 attached to the split body 11.

In the intermediate body 12, the base member divided bodies 11, 11 are arranged at a predetermined interval at the construction site, and after the vertical member 21 is mounted on the divided bodies 11, 11, the divided body 11, It is formed by placing concrete between 11 parts.
Then, as described above, inside the intermediate body 12, from the end faces of the divided bodies 11, 11, the intermediate body reinforcing bars 16, 16, 16
... and auxiliary reinforcing bars 25, 25 from the vertical member 21,
Since 25 and 25 are arranged, by forming the intermediate body 12, the divided bodies 11 and 11 and the vertical member 21 are integrated, and the foundation B is formed.

Next, a prefabricated PC base B having the above structure
The construction method of will be described.

Step 1: Centering of the installation position of the base member divided bodies 11, 11, 11, 11, ... Is carried out on the foundation substrate on which chestnuts have been placed (see FIG. 6).

Step 2: Base member divided bodies 11, 1
Level adjustment of the chestnut floor top and base member divisions 11, 11, 11, 11 at locations where 1, 11, 11, ... Are arranged.
Lay empty kneading mortar for fixing (see Figure 7).
It should be noted that discarded concrete may be laid in place of the empty kneading mortar.

Step 3: Dispose the divided bodies 11, 11, 11, 11, ... On the empty kneading mortar (see FIG. 8). If waste concrete is laid, this work is performed after the waste concrete is solidified.

Step 4: Divided bodies 11, 11, 11, 1
Intermediate end rebar 16,16,16,16 on the end face of 1 ...
... is planted (see Fig. 9).

Step 5: Arranged divided bodies 11, 1
Vertical members 21, 21, 21 ...
・ Indicating for installation.

Step 6: Vertical members 21, 21, 21
.. are divided bodies 11, 11, 11, 11, according to the black ink
・ Place on ・ (See Fig. 10).

Step 7: Vertical members 21, 21, 21
.. Vertical members 21, 21 that are adjacent to the upper part of
And the current anchor.

Step 8: Divided bodies 11, 11, 11, 1
The joining reinforcing bars 18, 18, 18 ... Are planted on the upper surface of 1 (see FIG. 11).

Step 9: Divided bodies 11, 11, 11, 1
A temporary frame for the intermediate bodies 12, 12, 12 ... and a vertical frame for the vertical members 21, 21, 21.

Step 10: Divided bodies 11, 11, 11,
11 ... Between the spaces and the vertical members 21, 21, 21 ... Connection parts are poured with concrete.

Step 11: After curing the concrete for a predetermined period, the temporary frame is disassembled (see FIG. 12).

As described above, according to this embodiment, since the level adjustment can be performed by the divided body, the workability thereof is remarkably improved. Further, since the vertical portion is formed by mounting the vertical member on the level-adjusted divided body, the formation and position adjustment can be easily performed. Furthermore, since the level adjustment work may be performed only on the portion where the base member divided body is arranged, the work can be reduced to about half.

[0040]

As described in detail above, according to the present invention,
In the factory, since it is sufficient to manufacture the flat base member divided body and the vertical member, the manufacturing process including the bar arrangement work in the factory is simplified, and since the products to be manufactured are flat, The effect is that the efficiency and the transportation efficiency can be significantly improved.

On the other hand, at the construction site, since the level adjustment can be performed by the base member divided body, the workability can be remarkably improved, and the base member divided body and the intermediate body are integrated to form a base. Form a part,
The stress at the bottom can be kept within the earth's proof stress, and since the vertical part is formed by mounting the vertical member on the level-adjusted base member divided body, it is easy to secure the verticality. In addition to being able to obtain the position, the position can be easily adjusted, and in addition to that, the effect that the construction range of the leveling mortar and the waste concrete for level adjustment can be approximately halved is also obtained.

[Brief description of drawings]

FIG. 1 is an overall perspective view of an assembled PC base according to an embodiment of the present invention.

FIG. 2 is a plan view of one of the base member divided bodies of the embodiment.

FIG. 3 is a front view of the same.

FIG. 4 is a front view of the vertical member of the embodiment.

FIG. 5 is a side view of the same.

FIG. 6 is an explanatory diagram of a construction procedure of the same example, showing a state in which cobblestone is laid.

FIG. 7 is an explanatory diagram of a construction procedure of the embodiment, showing a state in which dry kneading mortar is constructed at a position where the base member divided body is arranged.

FIG. 8 is an explanatory view of a construction procedure of the embodiment, showing a state in which the base member divided body is arranged.

FIG. 9 is an explanatory view of a construction procedure of the same example, showing a state in which a reinforcing bar for an intermediate body is planted on an end surface of the divided body.

FIG. 10 is an explanatory view of a construction procedure of the embodiment, showing a state in which a vertical member is mounted between the divided bodies.

FIG. 11 is an explanatory view of a construction procedure of the embodiment, showing a state in which joining reinforcing bars are planted on the upper surface of the divided body.

FIG. 12 is an explanatory view of a construction procedure of the embodiment, showing a state in which the temporary frame is disassembled and the foundation is completed.

FIG. 13 is a cross-sectional view of a conventional integrated PC base block.

FIG. 14 is a cross-sectional view of a conventional separable PC basic block.

[Explanation of symbols]

10 Base part 11 Base member division 12 Intermediate 15,17 High nut (female screw body) 16 Reinforcing Bar for Intermediate 18 Reinforcing bar 20 Vertical part 21 Vertical member 24 steps 25 Auxiliary rebar B Assembly type PC foundation

Claims (7)

(57) [Claims] 1. A small number arranged at predetermined intervals at a construction site.
At least a pair of base member divided bodies and mounted on the divided bodies
And at least one vertical member,For joining to join the vertical member to the upper surface of the divided body
The female screw body to which the reinforcing bar is screwed is arranged in substantially the same plane, Arrangement of the reinforcing bars for joining at both lateral ends of the vertical member
A step is formed for The division body and the vertical member are the division body at the construction site.
Characterized by being integrated by an intermediate body formed between
Prefabricated precast concrete foundation to be used. 2. The precast concrete foundation according to claim 1, wherein the intermediate body forming portion is provided at an end surface of the divided body facing each other and / or at a lower end of the vertical member. 3. An intermediate body forming portion formed on opposite end surfaces of the divided body has a plurality of female screw bodies embedded in the end surfaces, and one end thereof is screwed into the female screw bodies to project outward. The prefabricated precast concrete foundation according to claim 2, characterized in that the precast concrete foundation comprises a rebar. 4. The intermediate body forming portion formed at the lower end of the vertical member is a substantially L-shaped auxiliary rebar that projects a predetermined distance from a position corresponding to the intermediate body at the lower end. Item 2. Prefabricated precast concrete foundation according to item 2. 5.Any one of claims 1 to 4.
Of prefabricated precast concrete foundation described in
The law, Arranging the base member divided bodies at predetermined intervals, Mounting a vertical member on the base member divided body; An intermediate is formed between the divided bodies, and the intermediate is formed by the intermediate.
And the step of integrating the split body and the vertical member.
Of prefabricated precast concrete foundation characterized by
Construction method. 6. The method of claim wherein the step of reinforcing bars are embedded in opposite end faces of the split bodies is added 5
Construction method for the prefabricated precast concrete foundation described. 7. The method of constructing a precast concrete foundation according to claim 5, further comprising a step of implanting a reinforcing bar for joining on the upper surface of the divided body.