JP7633907B2 - Pillar, pillar installation structure, and pillar installation method - Google Patents

Description

The present invention relates to a column that is erected by driving it into an installation surface, and to its installation structure and installation method.

There are various methods for erecting columns used as fence posts, car stops, etc., such as fastening them with anchor nuts or embedding them in concrete foundations. One method is to hammer the bottom end into the installation surface, such as soil, by striking or vibrating it, and then burying it in place, and erecting it, and various inventions for this have been disclosed.

For example, Patent Document 1 discloses a method for erecting posts for a protective fence, in which a hollow post with open top and bottom ends is driven into the ground and erected, and then the post is filled with a consolidation material and erected. The method uses a post made of a hollow tubular body with open top and bottom ends, and a consolidation tool that can be inserted into the post and struck, strikes the consolidation tool to penetrate the post together with the consolidation jig into the ground and erects it, strikes the soil taken into the post with the consolidation tool to form a consolidated soil mass at the bottom of the post, fills the entire interior of the post closed with the consolidated soil mass with a consolidation material, and binds the consolidated soil mass and the consolidated soil material together via the exterior pipe.

JP 2016-204882 A

The method of erecting pillars shown in Patent Document 1 uses a compaction tool to compact the soil inside the pillar into a compacted soil mass, and then fills the entire interior of the pillar with a consolidating material. However, there is a problem in that it is necessary to wait until the consolidating material, such as cement or mortar, has solidified before carrying out subsequent processes or using the pillar.

The present invention provides a column body, a column body installation structure, and a column body installation method that can be used immediately after erection work.

In order to achieve the above object, the present invention has the following configuration.
In other words, the pillar of the present invention is a pillar that is erected by driving it into an installation surface consisting of soil or the like, and comprises a hollow cylindrical pile portion, a hollow cylindrical column portion whose lower part is stored inside the pile portion, and a reinforcing portion whose lower part is stored inside the column portion, the pile portion being a first soil storage portion having a first opening whose hollow part opens downward, the column portion being a second soil storage portion having a second opening whose hollow part opens downward, the reinforcing portion being equipped with a buried portion, and the stored soil stored in the first soil storage portion through the first opening is stored in the second soil storage portion through the second opening, and the lower part of the buried portion is buried in the stored soil.

The column installation structure according to the present invention is a column installation structure that is erected by driving into an installation surface made of soil or the like, and the column includes a hollow cylindrical pile section, a hollow cylindrical column section whose lower part is stored inside the pile section, and a reinforcing section whose lower part is stored inside the column section, the pile section is a first soil storage section having a first opening whose hollow part opens downward, the stored soil that passes through the first opening is stored in the first soil storage section, the column section is a second soil storage section having a second opening whose hollow part opens downward, the stored soil that passes through the second opening is stored in the second soil storage section, the reinforcing section includes a buried section, and the buried section is buried in the stored soil in the second soil storage section, characterized in that the lower part of the reinforcing section is buried in the stored soil in the second soil storage section.

The method for installing a column according to the present invention is a method for installing a column by driving it into an installation surface made of soil or the like, the column having a hollow cylindrical pile section, a hollow cylindrical column section whose lower part is stored inside the pile section, and a reinforcing section whose lower part is stored inside the column section, the pile section being a first soil storage section having a first opening whose hollow part opens downward, the column section being a second soil storage section whose hollow part opens downward, the reinforcing section being a buried section, and the method includes the steps of: driving the pile section into the installation surface to store the soil that has passed through the first opening in the first soil storage section; driving the column section into the stored soil in the first soil storage section to store the stored soil that has passed through the second opening in the second soil storage section; and driving the reinforcing section into the stored soil in the second soil storage section to bury the buried section of the reinforcing section in the stored soil.

According to the column, column installation structure, and column installation method of the present invention, the column comprises a hollow cylindrical pile section, a hollow cylindrical column section whose lower part is stored inside the pile section, and a reinforcing section whose lower part is stored inside the column section, so that the strength of the column section erected inside the pile section is improved by the reinforcing section.
In addition, the hollow portion of the pile section is made into a first soil storage section having a first opening that opens downward, so that the pile section can be installed by driving the pile section into the installation surface, and soil can be passed through the first opening and stored in the first soil storage section.
In addition, the hollow portion of the pillar is made into a second soil storage section having a second opening that opens downward, so that the pillar can be installed by driving the pillar into the stored soil in the first soil storage section, and the stored soil can be passed through the second opening and stored in the second soil storage section.
Furthermore, since the reinforcing portion has a buried portion that is disposed so as to be buried in the stored soil in the second soil storage portion, the reinforcing portion can be installed by driving the reinforcing portion into the stored soil.
Since the pile section, the pillar section, and the reinforcing section can be installed by driving them in, respectively, the pillar body can be erected and used only by driving work, without needing time to allow concrete or mortar to harden after filling it.
Furthermore, inside the column, the soil stored in the second soil storage section is in a more compact state than the soil stored in the first soil storage section and the soil outside the column, so deformation of the stored soil when subjected to external forces is suppressed, and the strength of the column in the area where the stored soil in the second soil storage section is located is improved.

In addition, by positioning the lower end of the column section above and spaced apart from the lower end of the pile section, and positioning the lower end of the reinforcing section above and spaced apart from the lower end of the column section, a double-structure section in which the column section is housed within the pile section is located below the triple-structure section in which the column section and reinforcing section are housed within the pile section, and a section containing only the pile section and stored soil is located further below that. By arranging the column body in this way, the rigidity of the column body changes in stages from the installation surface downward, so that when the column body receives a strong impact, such as when it comes into contact with a vehicle, damage to the column body caused by force concentrating on the section where the rigidity changes greatly can be suppressed.

In addition, if a restricting section is provided on the pile section with the column section and the reinforcing section housed inside, and this restricting section restricts the downward movement of the column section and the reinforcing section relative to the pile section, the pile section can be driven into the installation surface by driving at least one of the column section and the reinforcing section downward, improving work efficiency.

The pillar body, pillar body installation structure, and pillar body installation method of the present invention allow pillar bodies with great strength to be erected and then used immediately.

FIG. 1 is a diagram showing an embodiment of a column body according to the present invention. FIG. 2 is a partial cross-sectional view showing the installation state of the column body of FIG. 1 . FIG. 3 is a front view showing the pile portion and the column portion of FIG. 2 . FIG. 3 is a front view showing the reinforcing portion of FIG. 2 . FIG. 5 is a plan view of FIG. FIG. 4 is a diagram showing the state before the pile part in FIG. 3 is installed on an installation surface. FIG. 7 is a diagram showing a state in which the pile part in FIG. 6 is installed on an installation surface. 8 is a diagram showing a state before the column part in FIG. 3 and the reinforcing part in FIG. 4 are installed inside the pile part in FIG. 7 . FIG. FIG. 9 is a diagram showing the state in which the pillar portion of FIG. 8 is installed. FIG. 10 is a diagram showing the state in which the column portion and the reinforcing portion in FIG. 9 are installed. This is a cross-sectional view taken along line AA in FIG. This is a cross-sectional view taken along line BB of Figure 10. This is a cross-sectional view taken along the line CC of FIG. FIG. 13 is a diagram showing another embodiment of a column body according to the present invention. FIG. 15 is a front view showing the pile portion and the column portion of FIG. 14 . FIG. 15 is a front view showing the reinforcing portion of FIG. 14 . FIG. 16 is a diagram showing the state in which the lower part of the column part 3 is stored inside the pile part 2 in FIG. 15 . FIG. 15 is a diagram showing the state before the column body in FIG. 14 is installed on the installation surface. 19 is a diagram showing the state in which the lower part of the pillar body in FIG. 18 has been driven into the installation surface. FIG. 20 is a diagram showing the state in which the pillar body of FIG. 19 has been further driven into the installation surface. FIG. 21 is a diagram showing the state in which the column body of FIG. 20 is installed on an installation surface.

The embodiment of the invention will be specifically described with reference to the drawings.
FIG. 1 is a view showing an embodiment of a columnar body 1 according to the present invention, and FIG. 2 is a partial cross-sectional view showing the installed state of the columnar body 1 of FIG.
The pillar body 1 shown in Figures 1 and 2 comprises a pile section 2 buried and fixed in the installation surface G, a column section 3 erected with its lower part stored inside the pile section 2, and a reinforcing section 4 stored inside the column section 3. The pillar body 1 shown in Figure 1 shows a state in which a cover material 9 is attached so as to cover the outer surface of the column section 3 to form a car stopper P, and Figure 2 shows a state in which the cover material 9 has been removed from the pillar body 1 in Figure 1. In Figure 2, the reinforcing section 4 stored inside the column section 3 is shown by a dotted line, and the entire pile section 2 is shown as a cross section below the installation surface G.
The installation surface G shown in FIGS. 1 and 2 is formed of so-called soil M including earth, sand, pebbles, and the like.

The pile portion 2 is a long cylindrical body having a hollow portion 21 inside, and is specifically formed from a round steel pipe.
In addition, the column portion 3 is a long, cylindrical body having a hollow portion 31 on the inside, and is specifically formed from a round steel pipe, and more specifically, is formed from a round steel pipe with an outer diameter slightly smaller than the inner diameter of the pile portion 2.
FIG. 3 is a front view showing the pile portion 2 and the column portion 3 of FIG.
As shown in FIG. 3, the pile portion 2 has a hollow portion 21 that opens on both sides in the longitudinal direction and communicates with the outside, an opening portion 22 at the upper end of the pile portion 2, and a first opening portion 23 at the lower end.
The column 3 has a hollow portion 31 that opens on both sides in the longitudinal direction and communicates with the outside, an opening 32 at the upper end of the column 3, and a second opening 33 at the lower end.

4 is a front view showing the reinforcing portion 4 in FIG. 2, and FIG. 5 is a plan view of FIG.
The reinforcing part 4 includes a core part 45, which is a cylindrical elongated body having an inner hollow part 41a, and a reinforcing member part 46 provided on the outer surface of the core part 45. The core part 45 is a rectangular cylindrical body with a cross section having a substantially square shape with rounded corners, and is specifically formed from a rectangular steel pipe. The inner hollow part 41a of the core part 45 opens on both sides in the longitudinal direction and communicates with the outside, and has an opening part 42a at the upper end of the core part 45 and a third opening part 43a at the lower end.
The reinforcing portion 4 is formed such that the longitudinal size of the core portion 45 is smaller than that of the column portion 3 .

The reinforcing material parts 46 of the reinforcing part 4 are formed by bending a long steel plate into a generally L-shape in a plan view, and a total of four reinforcing material parts 46 are arranged, one on each of the four sides of the core part 4. Specifically, each reinforcing material part 46 is arranged with the L-shaped corners 47 facing outward, and the edges of each plate-like part are abutted against the outer surface of the core part 45 and fixed by welding.
Each reinforcing member 46 is formed so that its overall length in the vertical direction is approximately two-thirds the size of the core member 45 , and its lower end is positioned so as to coincide with the lower end of the core member 45 .
In addition, a hollow portion 41b having an approximately triangular cross-sectional shape is formed between the inner surface of each reinforcing material portion 46 and the outer surface of the core portion 45, and each hollow portion 41b is connected to the outside through an opening 42b at the upper end of the reinforcing material portion 46 and a third opening 43b at the lower end.

The column body 1 shown in FIG. 2 is installed by burying the pile portion 2 in the soil M so that the opening 22 is positioned at a position that is approximately aligned with the installation surface G. The hollow portion 21 of the pile portion 2 functions as a first soil storage portion, and stores the stored soil m1 that has passed through the first opening 23. The upper end of the stored soil m1 is located near the installation surface G, and is stored in the entire pile portion 2.

The column 3 is installed with its lower portion stored inside the pile 2 and its upper portion protruding from the opening 22. In other words, the column 3 is installed upright on the installation surface G with its lower portion buried in the storage soil m1.
The hollow portion 31 of the column portion 3 functions as a second soil storage portion, and stores the stored soil m2 that has passed through the second opening 33. The upper end of the stored soil m2 is located near the installation surface G.
In addition, the lower end of the column portion 3 is disposed above and spaced apart from the lower end of the pile portion 2.

The reinforcing part 4, including its lower part functioning as a buried part, is stored in the hollow part 31 of the column part 3. Specifically, about 1/3 of the total length of the reinforcing part 4 is buried in the storage soil m2 as a buried part.
The hollow portion 41a of the core portion 45 of the reinforcing portion 4 functions as a third soil storage portion, storing the stored soil m3a that has passed through the third opening 43a. The hollow portion 41b of each reinforcing member portion 46 of the reinforcing portion 4 also functions as a third soil storage portion, storing the stored soil m3b that has passed through the third opening 43b.
The reinforcing portion 4 is arranged such that the lower end of the core portion 45 is disposed above and spaced from the lower end of the column portion 3 , and the upper end of the core portion 45 is disposed substantially aligned with the position of the upper end of the column portion 3 .
Further, the reinforcing portion 4 is provided such that the central portion in the longitudinal direction of each reinforcing material portion 46 is disposed near the installation surface G. In other words, the reinforcing portion 4 is provided such that each reinforcing material portion 46 is disposed so as to straddle the installation surface G above and below.

FIG. 6 is a diagram showing the state before the pile portion 2 in FIG. 3 is installed on the installation surface G.
The pile portion 2 is abutted against the installation surface G with the first opening 23 at the lower end, and is driven into the soil M and buried by a pile driver or the like that utilizes impact or vibration.
By driving the pile portion 2 into the soil M in this manner, the soil M that passes through the first opening 23 is stored as stored soil m1 within the hollow portion 21, which serves as the first soil storage portion.

Fig. 7 is a diagram showing the state in which the pile portion 2 in Fig. 6 is installed on an installation surface G. In Fig. 7 and Figs. 8 to 10 described later, the pile portion 2 and the column portion 3 are shown in cross section, and the reinforcing portion 4 is shown in its outline as seen from the front, for the sake of simplicity.
The pile portion 2 in FIG. 7 is driven into the soil M until the upper end thereof is substantially flush with the installation surface G, and then buried.

The pillar portion 3 has its lower portion stored inside the pile portion 2 and is erected above the installation surface G, and its lower portion is buried by being driven from above into the storage soil m1 inside the pile portion 2.
FIG. 8 is a diagram showing a state before the column portion 3 in FIG. 3 and the reinforcing portion 4 in FIG. 4 are installed inside the pile portion 2 in FIG.
In FIG. 8 , the lower end of the column 3 is in contact with the upper surface of the stored soil m1 inside the pile 2, and the reinforcing portion 4 is stored inside the hollow portion 31 of the column 3.
The pillar portion 3 is driven into the storage soil m1 by a pile driver or the like that utilizes impact or vibration, and the lower portion thereof is buried.
In addition, in FIG. 8, the upper end of the reinforcing portion 4 is disposed below and spaced from the upper end of the column portion 3, so that driving with a pile driver or the like is not performed on the reinforcing portion 4 but only on the column portion 3.

FIG. 9 is a diagram showing a state in which the pillar portion 3 in FIG. 8 is installed.
Figure 9 shows a situation in which the lower part of the pillar part 3 is buried in the storage soil m1 by driving the pillar part 3 into the storage soil m1 using a pile driver or the like, until its upper end coincides with the upper end of the reinforcing part 4.
By driving the lower part of the pillar section 3 into the stored soil m1 using a pile driver or the like, the stored soil m1 that passes through the second opening 33 is stored in the hollow section 31, which serves as the second soil storage section, as stored soil m2.

FIG. 10 is a diagram showing the state in which the column portion 3 and the reinforcing portion 4 of FIG. 9 are installed.
FIG. 10 shows the state in which the upper ends of the column parts 3 and the reinforcing parts 4 in FIG. 9 have been subjected to further impacts and vibrations using a pile driver or the like, and the lower parts of each have been driven into the ground and buried, which is the same state as the column body 1 shown in FIG. 2.
In other words, by simultaneously striking or vibrating the column 3 and the reinforcing portion 4, whose upper ends are aligned, the lower portion of the column 3 is driven further into the storage soil m1, and the lower portion of the reinforcing portion 4 is driven into the storage soil m2 and buried therein.
By driving the buried lower part of the reinforcing part 4 into the stored soil m2, the stored soil m2 that passes through the third openings 43a, 43b is stored as stored soil m3a, m3b in the hollow parts 41a, 41b, which form the third soil storage part, respectively.

11 is a cross-sectional view taken along line AA in FIG. 10, FIG. 12 is a cross-sectional view taken along line BB in FIG. 10, and FIG. 13 is a cross-sectional view taken along line CC in FIG.
As shown in Fig. 13, the column body 1 erected on the installation surface G has a portion in which the column section 3 and the reinforcing section 4 are housed inside the pile section 2, which is disposed near the installation surface G. This triple-structure portion in which the column section 3 and the reinforcing section 4 are housed inside the pile section 2 is formed to be approximately one-fifth the size of the entire length of the column section 1 from the bottom end of the pile section 2 to the top ends of the column section 3 and the reinforcing section 4, as shown in Fig. 10.
In addition, below the lower end of the reinforcing portion 4, a portion in which the column portion 3 is stored inside the pile portion 2 is located as shown in Figure 12, and further below the lower end of the column portion 3, only the pile portion 2 is located as shown in Figure 11.
That is, at the portion where the column body 1 is buried in the installation surface G, three portions with different rigidity are formed by varying the overlap of each component, the pile portion 2, the column portion 3, and the reinforcing portion 4, and the rigidity is gradually decreased toward the bottom.

As shown in FIG. 11, in the area where only the pile portion 2 is arranged, stored soil m1a is stored inside the pile portion 2.
By driving in, the stored soil m1a stored in the first soil storage section is made to have a degree of compaction that is approximately the same as that of the soil M outside the pile section 2. The degree of compaction of the soil here refers to the size of the gaps between the particles of soil, sand, pebbles, etc. that make up the soil, and soil that has been compacted or otherwise made to have smaller gaps between the particles is considered to be in a more compact state.

Also, as shown in Figure 12, in the area where only the column portion 3 is stored inside the pile portion 2, stored soil m2a is stored inside the column portion 3, and stored soil m1b is stored between the column portion 3 and the pile portion 2.
The stored soil m2a, m1b is placed inside and outside the cylindrical wall of the column body 3 by driving the column part 3 into the stored soil m1 held inside the pile part 2, and is therefore in a more consolidated state than the stored soil m1a. By making the stored soil in a consolidated state in which the gaps between the constituent particles of sand, soil, etc. are made smaller, the movement of the particles is suppressed when an external force is applied, and the effect of reducing deformation of the column body 1 can be expected.
In other words, in the area where the column section 3 is stored inside the pile section 2, it is expected that the rigidity will be further increased by storing soil m2a, m1b in a more compacted state compared to the area where only the pile section 2 is placed below it.

As shown in Figure 13, in the area where the column section 3 and the reinforcing section 4 are stored inside the pile section 2, stored soil m3a is stored in the hollow section 41a of the reinforcing section 4, stored soil m3b is stored in the hollow section 41b, and stored soil m2b is stored between the reinforcing section 4 and the column section 3.
Since the stored soil m3a, m3b, and m2b are arranged inside and outside the cylindrical wall of the reinforcement section 4 by driving the pillar section 3 into the stored soil m2a which is held inside the pillar section 3, the stored soil m3a, m3b, and m2b are in a more compacted state than the stored soil m2a.
In other words, in the area where the column section 3 and the reinforcing section 4 are stored inside the pile section 2, it is expected that the rigidity will be further increased by storing more compacted soil m3a, m3b, and m2b in comparison with the area below where the column section 3 is stored inside the pile section 2 or in the area where only the pile section 2 is arranged.

The column 1 has three sections with different rigidity formed by varying the overlap of each component and the compaction state of the stored soil, and is configured so that the rigidity decreases in stages as it goes below the installation surface G.
By configuring the pillar 1 in this manner, when the pillar 1 receives a large external force due to contact with a vehicle or the like, damage caused by the force being concentrated on a portion where the rigidity changes significantly can be suppressed.

Moreover, the column 1 stores soil inside the pile section 2, column section 3, and reinforcing section 4, instead of a filler such as mortar or concrete that hardens from a soft state. By providing the column 1 in this manner, no part where the rigidity of the column 1 changes significantly occurs at the boundary between the filler and the soil, and damage caused by the concentration of force on the part where the rigidity changes significantly when the column 1 receives a large external force due to contact with a vehicle or the like can be suppressed.
In addition, since no filler such as mortar or concrete is used, no time is required for the filler to harden, and the column 1 can be used immediately after each of the members constituting the column 1 is installed by pouring.

The method of installing the column body 1 involves driving the pile section 2, the column section 3, and the reinforcing section 4 into the ground using a pile driver or similar device that uses impact or vibration, making installation easy and eliminating the need for any other construction equipment other than the pile driver. In addition, each component may be driven in manually using a hammer or similar device instead of a pile driver.

In addition, the installation structure of the column body 1 allows the column section 3 and the reinforcing section 4 to be installed by driving them into the stored soil m1 and the stored soil m2, respectively, so that the stored soil m2 and the stored soil m3 inside can be made more compact. Therefore, compared to a method in which the column section 3 is inserted inside the pile section 2 and then soil is poured from above into the gap between the pile section 2 and the column section 3 to fill it, or a method in which the reinforcing section 4 is inserted inside the column section 3 and then soil is poured from above into the gap between the column section 3 and the reinforcing section 4 to fill it, this method is preferable because it increases the rigidity of the column section 3 and the reinforcing section 4 that store the stored soil m2 and m3.

The column 1, the installation structure of the column 1, and the installation method of the column 1 according to the present invention are not limited to the above-mentioned embodiment, and various modifications are possible without departing from the gist of the present invention.
For example, the column 1 of the present invention has three parts with different rigidity below the installation surface G, but is not limited to this. Four or more parts with different rigidity may be formed by changing the shape of the reinforcing part 4, for example.

In addition, in the installation method of the pillar body 1 shown in Figures 6 to 10, the reinforcing part 4 is driven in at the same time as the pillar body 3, but this is not limited to this. After the pillar body 3 is driven into the inside of the pile body and embedded, the reinforcing part 4 may be driven into the inside of the pillar body 3 and embedded therein.

The column 1 is arranged so that the positions of the upper ends of the column 3 and the reinforcing part 4 are aligned, but this is not limited to this, and the upper end of the reinforcing part 4 may be arranged above or below the upper end of the column 3.

In addition, the reinforcing portion 4 to be stored within the pillar 3 is not connected to the pillar 3 before installation on the installation surface G, but this is not limited to this, and the reinforcing portion 4 may be connected to the pillar 3 using fastening members such as bolts and screws or fixing means such as welding.
In addition, although the pillar body 3 to be stored in the pile part 2 is not connected to the pile part 2 before installation, this is not limited thereto, and they may be connected to each other by fastening members, welding, etc. However, by forming the pile part 2 and the pillar body 3 separately, the overall length of the pillar body 1 before installation can be made smaller, which is preferable because it makes it easier to transport the members and prepare for installation work.

The pillars 1 are fitted with covers 9 and used as car stops P, but this is not limited to this. Panels or beams may be attached to multiple pillars 1 set upright at intervals and used as supports that make up a fence.

FIG. 14 is a diagram showing another embodiment of the column body 1 according to the present invention.
The pillar 1 shown in FIG. 14 differs from the pillar 1 shown in FIG. 2 etc. mainly in that a restricting portion 29 is provided on the pile portion 2 and in the shape of the reinforcing portion 4.
That is, the column body 1 shown in Figure 14, like the column body 1 shown in Figure 2, has a pile portion 2, a column portion 3 whose lower portion is stored inside the pile portion 2, and a reinforcing portion 4 stored inside the column portion 3.

14 is formed by a restricting member 8 attached to the pile portion 2. Specifically, the restricting member 8 is a fastening member consisting of a bolt and a nut, and the restricting member 8 is attached to the pile portion 2 by screwing the nut onto the male thread of a bolt that is inserted through the center of the pile portion 2.
The pile portion 2 is provided with two restricting portions 29, and restricting portions 29a and 29b are disposed with a gap therebetween in the vertical direction.
Each of the restricting portions 29a, 29b restricts the downward movement of the column portion 3, the lower end of which is stored inside the pile portion 2. The restricting portion 29a also restricts the downward movement of the reinforcing portion 4, which is stored inside the column portion 3.

FIG. 15 is a front view showing the pile portion 2 and the column portion 3 of FIG.
The pile portion 2 shown in Figure 15 differs from the pile portion 2 shown in Figure 3 only in its configuration in which a through hole 28a for attaching the regulating member 8a that constitutes the regulating portion 29a and a through hole 28b for attaching the regulating member 8b that constitutes the regulating portion 29b are formed.
That is, the pile portion 2 shown in FIG. 15 is formed of a round steel pipe having a hollow portion 21 inside, and has an opening portion 22 at the upper end of the pile portion 2 and a first opening portion 23 at the lower end.
Each of the through holes 28a, 28b is formed in a circular shape so that the male threads of the bolts constituting the restricting members 8a, 8b can be inserted therethrough.

The column portion 3 shown in FIG. 15 differs from the column portion 3 shown in FIG. 3 only in the configuration in which a through hole 38a for mounting a regulating member 8a constituting the regulating portion 29a is formed.
That is, the column portion 3 shown in Figure 15 is formed from a round steel pipe with an outer diameter slightly smaller than the inner diameter of the pile portion 2, and has a hollow portion 31 on the inside, an opening 32 at the upper end, and a second opening 33 at the lower end.
The through hole 38a is formed in a circular shape so that the male thread of the bolt serving as the restricting member 8a can be inserted therethrough, and is formed to be the same size as the through hole 28a provided in the pile portion 2.

FIG. 16 is a front view showing the reinforcing portion 4 of FIG.
The reinforcing portion 4 shown in FIG. 16 differs from the reinforcing portion 4 shown in FIG. 4 only in that the longitudinal size of the core portion 45 is formed to be the same as that of each reinforcing material portion 46 .
That is, the reinforcing part 4 shown in Fig. 16, like the reinforcing part 4 shown in Fig. 4, comprises a core part 45 formed of a square steel pipe having a hollow part 41a on the inside, and a reinforcing material part 46 provided on the outer surface of this core part 45. The hollow part 41a is connected to the outside through an opening 42a at the upper end of the core part 45 and a third opening 43a at the lower end.
4, and are fixed to the core portion 45 in the same arrangement in a plan view. A hollow portion 41b having a substantially triangular cross section is formed between the inner surface of each reinforcing portion 46 and the outer surface of the core portion 45, and each hollow portion 41b communicates with the outside through an opening 42b at the upper end of the reinforcing portion 46 and a third opening 43b at the lower end.
The opening 42a at the upper end of the core portion 45 and the openings 42b at the upper ends of the reinforcing material portions 46 are aligned in the up-down direction.

FIG. 17 is a diagram showing the state in which the lower part of the column part 3 is stored inside the pile part 2 of FIG.
The pile portion 2 shown in Figure 17 has a regulating portion 29a formed by a regulating member 8a consisting of a bolt inserted through and passing through the through hole 28a, and a regulating portion 29b formed by a regulating member 8b consisting of a bolt inserted through and passing through the through hole 28b.

17, the restricting member 8a is inserted into the through hole 38a. That is, the restricting member 8a penetrates the column 3, and the restricting portion 29a formed by the restricting member 8a restricts the vertical movement of the column 3 relative to the pile 2. In other words, the pile 2 and the column 3 are connected by the restricting member 8a.
The lower end of the column portion 3 is in contact with the restricting member 8b. That is, the second opening 33 of the column portion 3 is disposed in the vicinity of the restricting member 8b. The column portion 3 is restricted from moving downward relative to the pile portion 2 by the restricting portion 29b formed by the restricting member 8b.

The column body 1 shown in FIG. 14 is formed by inserting and housing the reinforcing portion 4 shown in FIG. 16 from above the column portion 3 shown in FIG. 17 into the inside of a hollow portion 31.
The lower end of the reinforcing portion 4 is in contact with the restricting member 8a. That is, the third openings 43a, 43b of the reinforcing portion 4 are disposed in the vicinity of the restricting member 8a.
The reinforcing portion 4 is restricted from moving downward relative to the pile portion 2 and the column portion 3 by a restricting portion 29a formed by a restricting member 8a.
Further, the reinforcing portion 4 shown in FIG. 14 is formed so that its upper end is located lower than the upper end of the column portion 3 .

FIG. 18 is a diagram showing the state before the columnar body 1 of FIG.
18 shows a column 1 having a spacer S housed inside the column section 3. The spacer S is made of a steel pipe, and is formed so that its lower end abuts against the upper end of the reinforcing section 4 and its upper end is disposed near the upper end of the column section 3.
The column 1 has the first opening 23 at the lower end of the pile portion 2 abutted against the installation surface G, and is struck or vibrated from above the column portion 3 by a pile driver or the like. The column portion 3 is restricted from moving downward relative to the pile portion 2 by the restricting portions 29a, 29b, so that the struck or vibrated is transmitted to the pile portion 2 via the restricting portions 29a, 29b, and the pile portion 2 is driven into the soil M and buried therein.
By driving the pile portion 2 into the soil M in this manner, the soil M that passes through the first opening 23 is stored as stored soil m1 within the hollow portion 21, which serves as the first soil storage portion.

FIG. 19 is a diagram showing the state in which the lower part of the column body 1 in FIG.
In the column 1 in Fig. 19, stored soil m1 is stored in the hollow portion 21 of the pile portion 2, which serves as a first soil storage portion, below the installation surface G. In addition, in the column 1 in Fig. 19, the restricting member 8b is in contact with the installation surface G, and the second opening 33 of the column portion 3, the lower end of which abuts against the restricting member 8b, is located in the vicinity of the stored soil m1.

The pillar body 1 in Figure 19 can be buried and the pillar portion 3 can be driven into the storage soil m1 in the hollow portion 21 of the pile portion 2 by further striking or vibrating the pillar portion 3 from above using the pile driver or the like.
FIG. 20 is a diagram showing the state in which the column 1 of FIG.
The column body 1 shown in Figure 20 has the lower part of the column section 3 driven into the stored soil m1, and the stored soil m1 that passes through the second opening 33 of the column section 3 is stored in the hollow section 31, which serves as a second soil storage section, as stored soil m2.
In addition, in the column body 1 shown in Figure 20, the regulating member 8a is in contact with the installation surface G, and the third openings 43a, 43b of the reinforcing part 4, whose lower end abuts against the regulating member 8a, are positioned in the vicinity of the stored soil m2.

The pillar 1 in Fig. 20 can be buried in the installation surface G by applying further impacts, vibrations, etc. from above the pillar 3 using the pile driver or the like. Specifically, the pile 2 is buried, and the pillar 3 is driven into the stored soil m1 in the hollow portion 21 of the pile 2. Furthermore, the impacts, vibrations, etc. from the pile driver or the like are transmitted to the reinforcing portion 4 via the spacer S, and the lower portion of the reinforcing portion 4 is driven into the stored soil m2 in the hollow portion 31. After the upper end of the pile 2 is driven into the installation surface G, the spacer S is removed from the inside of the pile 3, and the pillar 1 is installed.
FIG. 21 is a diagram showing the state in which the columnar body 1 of FIG.
In the column 1 shown in Figure 21, the lower part, which is the buried part of the reinforcing part 4, is driven into the storage soil m2, and the storage soil m2 that passes through the third openings 43a, 43b is stored as storage soil m3a, m3b in the hollow parts 41a, 41b, which form the third soil storage part, respectively.

21 is the same as FIG. 11, the BB cross section of FIG. 21 is the same as FIG. 12, and the CC cross section of FIG. 21 is the same as FIG.
In the column body 1 of Figure 21 which is erected on an installation surface G, the portion where the column section 3 and the reinforcing section 4 are stored inside the pile section 2 is positioned near the installation surface G, the portion where the column section 3 is stored inside the pile section 2 is positioned below the lower end of the reinforcing section 4, and furthermore only the pile section 2 is positioned below the lower end of the column section 3.
That is, the column body 1 shown in Figure 21, like the column body 1 shown in Figure 10, has three sections with different rigidity at the portion embedded in the installation surface G by varying the overlap of each component of the pile portion 2, column portion 3, and reinforcing portion 4, and the rigidity is gradually decreased toward the bottom.

In the column body 1 shown in Figure 21, in the portion where only the pile portion 2 shown in Figure 11 is arranged, the stored soil m1a stored in the inner first soil storage portion is approximately the same degree of compaction as the soil M outside the pile portion 2.
In addition, in the column body 1 shown in Figure 21, in the portion where only the column portion 3 is stored inside the pile portion 2 shown in Figure 12, the stored soil m2a stored inside the column portion 3 and the stored soil m1b stored between the column portion 3 and the pile portion 2 are in a more compacted state than the stored soil m1a shown in Figure 11.
In addition, in the column body 1 shown in Figure 21, at the portion where the column section 3 and the reinforcing section 4 are stored inside the pile section 2 shown in Figure 13, the stored soil m3a stored in the hollow section 41a of the reinforcing section 4, the stored soil m3b stored in the hollow section 41b, and the stored soil m2b stored between the reinforcing section 4 and the column section 3 are each in a more compacted state than the stored soil m2a shown in Figure 12.
That is, the pillar 1 shown in FIG. 21, like the pillar 1 shown in FIG. 10, has three sections with different rigidity formed by varying the overlap of each component and the compaction state of the stored soil, and is configured so that the rigidity decreases stepwise the further below the installation surface G, so that when a large external force is applied due to contact with a vehicle or the like, damage caused by the force being concentrated on the sections where the rigidity changes greatly can be suppressed.

In the column 1 shown in Fig. 14, the restricting member 8 is formed of a fastening member consisting of a bolt and a nut, but this is not limited to this. For example, the restricting member 8 may be formed of a fastening member other than a bolt and a nut, or may be formed of a metal fitting other than a fastening member.
Furthermore, the restricting portion 29 provided on the pile portion 2 may be formed integrally with the pile portion 2 rather than being provided by a restricting member 8 formed separately from the pile portion 2 .

In addition, as shown in FIG. 16, the column 1 shown in FIG. 14 has the longitudinal size of the core 45 of the reinforcing part 4 formed to be the same size as each reinforcing material part 46, but this is not limited thereto, and it may be formed to be the same shape as the reinforcing part 4 shown in FIG. 4.

Reference Signs List 1 Pillar body 2 Pile portion 21 Hollow portion 22 Opening 23 First opening 28 Through hole 29 Regulating portion 3 Pillar portion 31 Hollow portion 32 Opening 33 Second opening 38 Through hole 4 Reinforcing portion 41 Hollow portion 42 Opening 43 Third opening 45 Core portion 46 Reinforcing material portion 47 Corner portion 8 Regulating member 9 Cover material G Installation surface M Soil m1 Storage soil m2 Storage soil m3 Storage soil P Car stopper S Spacer

Claims (7)

A column body that is erected by driving into an installation surface made of soil or the like,
The pile structure includes a hollow cylindrical pile portion, a hollow cylindrical column portion whose lower portion is housed inside the pile portion, and a reinforcing portion whose lower portion is housed inside the column portion,
The pile portion is a first soil storage portion having a first opening portion that opens downward in a hollow portion,
The column portion is configured as a second soil storage portion having a second opening in which the hollow portion opens downward,
The reinforcing portion includes an embedded portion,
A columnar body characterized in that the soil stored in the first soil storage section through the first opening is stored in the second soil storage section through the second opening, and the lower part of the buried section is buried in the stored soil. The column body according to claim 1, characterized in that the lower end of the column portion is disposed above and spaced from the lower end of the pile portion, and the lower end of the reinforcing portion is disposed above and spaced from the lower end of the column portion. The column body according to claim 1 or 2, characterized in that a restricting portion is provided on the pile portion in which the column portion and the reinforcing portion are housed, and the restricting portion is provided so as to restrict the downward movement of the column portion and the reinforcing portion relative to the pile portion. A column installation structure that is erected by driving into an installation surface made of soil or the like,
The column body includes a hollow cylindrical pile portion, a hollow cylindrical column portion whose lower portion is housed inside the pile portion, and a reinforcing portion whose lower portion is housed inside the column portion,
The pile portion is configured as a first soil storage portion having a first opening that opens downward in a hollow portion, and the soil that passes through the first opening is stored in the first soil storage portion;
The column portion has a hollow portion which is a second soil storage portion having a second opening which opens downward, and the stored soil is stored in the second soil storage portion through the second opening,
The reinforcing portion includes an embedded portion,
A column installation structure, characterized in that the buried portion is buried in the stored soil within the second soil storage portion. The column installation structure according to claim 4, characterized in that the lower end of the column is spaced above the lower end of the pile, and the lower end of the reinforcing part is spaced above the lower end of the column. A method for installing a pillar body by driving it into an installation surface made of soil or the like,
The column body includes a hollow cylindrical pile portion, a hollow cylindrical column portion for storing a lower portion inside the pile portion, and a reinforcing portion for storing a lower portion inside the column portion,
The pile portion is a first soil storage portion having a first opening portion that opens downward in a hollow portion,
The column portion is configured as a second soil storage portion having a second opening in which the hollow portion opens downward,
The reinforcing portion includes an embedded portion,
A step of storing the soil that has passed through the first opening in the first soil storage section by driving the pile portion into an installation surface;
a step of driving the pillar into the stored soil in the first soil storage section, thereby storing the stored soil that has passed through the second opening into the second soil storage section;
and driving the reinforcing part into the stored soil in the second soil storage section, thereby burying the buried part of the reinforcing part in the stored soil. The method for installing a column body according to claim 6, characterized in that a restricting section is provided on the pile section with the column section and the reinforcing section stored inside, and the restricting section is provided to restrict the downward movement of the column section and the reinforcing section relative to the pile section, and a step is performed in which the pile section is driven into the installation surface and the soil that has passed through the first opening is stored in the first soil storage section by driving at least one of the column section and the reinforcing section downward.

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