JP3833231B2 - Pillar foundation construction method - Google Patents

Description

  The present invention relates to a column foundation construction method, and more particularly to a column foundation construction method capable of installing a pillar having sufficient strength in a situation where construction is difficult.

Conventionally, a garage column or a tall blindfold fence is often provided near the boundary with the adjacent land. The arrangement of the basis for the pillars garage roof in this case is shown in FIG. 6 (A). With reference to FIG. 6 (A), the relationship between the foundation 73, the pillar 71, and the boundary 50 with an adjacent land in the case of constructing a garage roof at a position close to the boundary 50 with the adjacent land is shown. On the other hand, FIG. 7 is a diagram showing a construction cross section of the foundation 83 when a fence is constructed near the boundary 50. Referring to FIG. 7 , conventionally, a deep hole 85 is excavated, to which a chestnut stone 84 or a crusher run is rolled to some extent, a thrown away container is struck, and a concrete base 83 having a cavity 82 is formed therein. Backfill with soil. A pillar 81 supporting the fence is held vertically in the cavity 82, and the fence is installed. After that, mortar is poured into the cavity 82 to be integrated with the foundation.

FIG. 6 (B) in FIG. 6 (A), the a arrow view of a portion indicated by B-B, in the case of providing a carport near the boundary portion between the adjacent land shown in FIG. 6 (A), conventional It is a figure which shows the construction state in the case of embedding the support | pillar of a carport in the foundation. With reference to FIG. 6 (B), conventionally, there are many cases where a carport is provided just at the border 50 with the adjacent land due to the land situation in Japan. In this case, the basis 73 of the pillar 71 of the carport, an attempt to secure a cover thickness of concrete, for a portion from the boundary 50 (a portion indicated by d in FIG. 6 (B)) protrudes into adjacent land side, grounds Within the boundary, the cover thickness of the concrete cannot be secured, and the foundation 73 cannot obtain a sufficient plane area. On the other hand, when the position of the carport on the opposite side of the boundary 50 is determined, if an attempt is made to secure the cover thickness d, the effective area as the carport is reduced by the cover thickness d.

The same applies to the fence foundation 83 shown in FIG. 7. In FIG. 7 , when the fence foundation 83 is provided at the border 50, the concrete cover thickness is secured on the fence foundation 83 within the site boundary within the site boundary. It cannot be partly projected (portion indicated by d in FIG. 7 ), and the base 83 cannot obtain a sufficient plane area.

As described above, when the construction without securing the head of the foundation concrete, as shown in FIG. 7, when the construction of the foundation for tall fences, or inclined fence strong winds, carport shown in FIG. 6 In this case, there was a problem that the carport collapsed due to the weight of snow on the roof.

  As described above, when installing a column near the boundary, the foundation of a column subject to a pull-out load and / or tipping moment, such as a cantilever type carport column or a fence foundation, There was a problem that it was difficult because the cover thickness of concrete could not be secured.

  The present invention has been made in view of the above-described conventional problems, and has sufficient strength for a column subjected to a pulling load and / or a tipping moment, such as a column for a carport of a cantilever type. It aims at providing the construction method of the foundation of a pillar which can be made.

  Another object of the present invention is to provide a column foundation construction method capable of easily constructing a column with a pulling load and / or a tipping moment, such as a cantilever type carport column. And

The column foundation construction method according to the present invention includes a step of excavating a vertical hole in a standing position of the column, driving a pile into the vertical hole to a position deeper than a depth of excavation of the vertical hole, and a distance from the pile in the vertical hole. The step of installing a column, the step of winding and connecting a strength member around the column and the pile, and placing the concrete in the foundation construction part including the inside of the vertical hole with the column and the pile connected The strength member is a high-strength fibrous body including a step of integrating the pillar and the pile.

  Preferably, the pile is a steel pipe and has a knurled line penetrating the vicinity of the upper part of the steel pipe.

  More preferably, the pile is a steel pipe pile having a filler and vertical bars inside.

The high-strength fiber body is one of a mesh , a belt, and a rope.

  In this invention, with the column and the pile connected, the column and the pile are integrated by placing concrete in the foundation construction part including the inside of the vertical hole, so that a falling moment is applied to the column. However, it is supported in the vertical direction by the pile.

  As a result, it is possible to provide a column foundation construction method capable of giving sufficient strength to a column subject to a pulling load and / or a tipping moment, such as a cantilever type carport column.

Therefore, for example, in the case of a column where it is difficult to secure concrete cover thickness on the boundary side, such as when a carport or fence column is provided at the limit of the site boundary, a mesh-like high-strength fiber body (Geogrid) ), A strength member having a thickness of about 2 mm to 3 mm is connected to the pillar and the pile , so that safety can be secured and sufficient strength can be provided.

An embodiment of the present invention will be described below with reference to the drawings. Figure 1 (A), (B) is, in the embodiment of the invention, conventional in FIG. 6 (A), is a diagram corresponding (B), the 2, 1, in II-II It is sectional drawing of the part shown. Here, the case of constructing a carport column will be described, but the same applies to the case of constructing a tall fence column.

With reference to FIG. 1 and FIG. 2, the steel pipe piles 21 and 22 shown in FIG. 4 are used as a pile for preventing the fall of the pillar 11. FIG. That is, the excavation hole 42 is excavated in the vertical hole 41 for construction of the pillar 11 as a pile head reinforcement part with a double scoop. A pair of steel pipe piles 21 and 22 is driven into the excavation hole 42 for reinforcing the pile head in a state where it is not necessary to be vertical.

In this embodiment, two steel pipe piles 21 and 22 are provided on the opposite side of the adjacent land boundary 50 with respect to the carport pillar 11, and the carport pillar 11 and the steel pipe piles 21 and 22 are strength members. 23, and are integrated by placing concrete. Thus, by providing the steel pipe piles 21 and 22 in the site with respect to the column 11 of the carport, the falling moment of the upper part of the pillar is absorbed by the steel pipe piles 21 and 22 through the strength member 23. As a result, the pillar 11 can be built by the steel pipe piles 21 and 22 in the vicinity of the adjacent land boundary 50 without falling down to the adjacent land side or the site interior side.

As shown in FIG. 2, a strength member 23 of a mesh-like high-strength fibrous body is wound around and connected to the lower part of the separated pillar 11 and the upper part of steel pipe piles 21 and 22 (not shown). The steel pipe piles 21 and 22 are provided with vertical bars 25 at the center thereof. The column 11 and the steel pipe piles 21, 22 may be connected using the column barb bars 33 and the steel pipe pile barb bars 32.

In addition, usually, if the pillar 11 is built at such a position, the concrete cover thickness of the foundation on the adjacent land boundary 50 side cannot be secured sufficiently, so there is a problem that the concrete cracks, but as in this embodiment Since the strength member 23 and the concrete are integrated by passing the strength member 23 between the pillar 11 and the adjacent land boundary 50, such a problem does not occur.

  In addition, although the example using two steel pipe piles was demonstrated here, not only this but one steel pipe pile may be sufficient.

Here, a mesh-like high-strength fibrous body (Geogrid) is a fiber base fabric that has been developed for the purpose of preventing uneven settlement of embankments, etc., and is coated with a resin. Nylon fiber, polyaramid fiber, glass fiber, vinylon fiber, carbon fiber, polyarylate fiber, polyacetal fiber and the like are preferable. Since synthetic fibers are used in this way, rust does not occur. Contact name as the fibers used in the original woven fabric, high strength fibers of the fiber are preferred. Such high-strength fibers include high molecular weight polyethylene, PET (polyethylene terephthalate), nylon 6, polyaramid (para, meta), glass, vinylon, PAN-based carbon fiber, pitch-based carbon fiber, polyarylate fiber, and polyacetal fiber. , PPS fiber, polyimide fiber, PEEK fiber, and fluorine fiber.

  In consideration of adhesion of concrete and the like, the mesh size is preferably about 10 mm to 100 mm.

As described above, by embedding the pillar 11 and the piles 21 and 22 with the strength member 23 and placing and integrating the concrete, sufficient strength can be ensured even when the cover thickness of the adjacent foundation concrete is zero. .

Moreover, since the fiber which comprises the strength member 23 is embed | buried under the ground, safety | security can be ensured by calculating required intensity | strength and increasing a fiber quantity, without the deterioration by an ultraviolet-ray occurring.

FIG. 3 is a diagram showing a modification of FIG. Referring to FIG. 3, here, instead of a net-like one , two or more belts separated from each other in the horizontal direction or ropes 23 a and 23 b and a pillar 11 and a pair of steel pipe piles 21 and 22 ( (Not shown).

Here, the belts and ropes 23a and 23b are preferably woven with high-strength fibers used for the net-like raw cloth described above.

  In this case, the column 11 and the steel pipe piles 21 and 22 (not shown) may be connected using the column barb 38 and the steel pipe pile barb 32.

Referring to FIG. 4 , steel pipe piles 21 and 22 have top portions opened, lower end portions 28 have a spire shape, and support members 29 for rotatably supporting longitudinal bars are provided therein. It has been. In FIG. 2 and 3, by a support member 29 shown in FIG. 4, a vertical stripe 25 and 26 is supported. During construction, the steel pipe piles 21 and 22 are also filled with non-shrink mortar.

  Moreover, the steel pipe piles 21 and 22 are provided with a knurled bar hole 27 for penetrating and holding the knurled bar.

In the said embodiment, the example which used the steel pipe pile as a pile was demonstrated. However, a concrete pile or a resin pile may be used as the pile in addition to the steel pipe pile. FIG. 5 is a view showing the concrete pile 75. Referring to FIG. 5 , the concrete pile includes a concrete pile main body 75, a protector 76 provided on an upper portion of the concrete pile main body 75 and embedded with an iron cap, and a hairpin 77 embedded in the concrete pile main body 75. and a 78, the lower end portion 79 that has a spire-type. Name your, hairpin muscle may be a single.

Even in the case where the concrete pile 75 is used, a mesh-like high-strength fiber body is connected to the pile 75 and the column as in the previous embodiment.

  In the above embodiment, the case of reinforcing a carport pillar or a tall fence pillar has been described, but the construction method of the foundation of this pillar is not limited to this, road signs, guardrails, signboards, traffic lights It can also be used to fix utility poles, light poles, poles and basket goals. In these columns, when steel pipe piles are used, the diameter is about 30 mm to 150 mm, although it depends on the dimensions of the columns.

  Moreover, in the said embodiment, although the case where it connected with a pillar using a pair of steel pipe pile as a pile was demonstrated, not only this but one steel pipe pile may be used and according to the ground Three or more piles may be used. Moreover, you may use not only a steel pipe pile but a nonferrous metal pipe.

In the form of the above embodiment has been described as poured concrete in the excavation, which, depending on the position to be used, which means that may be used mortar.

  In the said embodiment, although the dimension of the pile was not prescribed | regulated in particular, in the place where the ground is bad, it can cope by making a pile thicker and longer than usual.

  In the said embodiment, although the case where the deeper vertical hole was provided as a pile head reinforcement part in the vertical hole for construction was demonstrated, not only this but a vertical hole and a pile head reinforcement part as a hole of the same depth Also good.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

It is the top view and elevation which show the example of construction of the foundation concerning one embodiment of this invention. It is sectional drawing of the part shown by II-II in FIG. It is sectional drawing which shows other embodiment of the part shown by II-II in FIG. It is a figure which shows a steel pipe pile. It is a figure which shows a concrete pile or a resin pile. It is a figure which shows the conventional positional relationship of the boundary of a pillar and an adjacent place in the case of constructing the foundation of a carport in the position adjacent to an adjacent place. It is a figure which shows the foundation of the pillar which supports the conventional fence.

Explanation of symbols

11 Pillars, 21 and 22 Steel pipe piles, 23 Strength members, 25 Longitudinal bars, 28, 79 Lower ends, 29 Support members, 41 Vertical holes, 32 , 33 , 38 , 77 , 78 Shark bars , 42 Drilling holes for reinforcing pile heads.

Claims (4)

Drilling a vertical hole in the standing position of the column, and driving a pile into the vertical hole to a position deeper than the drilling depth of the vertical hole;
Installing a pillar spaced apart from the pile in the vertical hole;
Wrapping and connecting a strength member to the pillar and the pile;
In the state where the pillar and the pile are connected, by placing concrete in the foundation construction part including the space of the vertical hole, the step of integrating the pillar and the pile,
The said strength member is a construction method of the foundation of a pillar which is a high strength fiber body . The pillar pile construction method according to claim 1, wherein the pile is a steel pipe and has a barb that penetrates the vicinity of the upper part of the steel pipe. The said pile is the construction method of the foundation of a pillar of Claim 1 or 2 which is a steel pipe pile which has a filler and a vertical reinforcement inside. The column foundation construction method according to any one of claims 1 to 3, wherein the high-strength fiber body is one of a mesh , a belt, and a rope.

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