JPS6256294B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of erecting a relatively lightweight sign pole for displaying various sign boards.

Conventionally, there are two methods for erecting this type of pole: an embedding method and a driving method.The former involves inserting the pole 1 into a dug hole, and fixing the shaft below the pole 1 in the same longitudinal direction as the pole 1. The upper end of the resistance member 2 made of channel-shaped steel is struck with a hammer or the like, and the lower part of the pole is driven in as shown in Fig. After digging into the bottom, the hole is backfilled while compacting the soil well, and finally, cement 3 for shaping is poured into the ground area to create the built-in condition as shown in Figure 2.

This method has the advantage of requiring less materials for construction, but has the disadvantage that it takes a long time to complete construction.

In other words, even if the soil is sufficiently hardened, it is not easy to restore the soil once it has been dug down.Therefore, the area above the resistance member 2 of the pole 1 is in an extremely unstable state, and the cement 3 is not applied to the ground level. It was impossible to attach the sign board, which is subject to wind pressure, until after pouring and fixing the pole 1 at that part.

Usually quick-drying cement is used here,
Even so, it took several hours for it to completely harden, and at least during that time the sign board could not be attached, greatly reducing work efficiency.

As shown in Fig. 3, the latter driving method involves installing a plurality of resistance plates 6 around a cylinder 5 having an inner diameter larger than the planned pole and a length comparable to the rooting part of the pole. After driving the formed steel foundation 4, the soil inside the cylinder 5 is removed using a screw or other earth removing tool to make it into the state shown in Fig. 4, and then the cylinder 5 is removed.
Insert the pole 1' into the inside, and then attach the pole 1' and the cylinder 5.
A rapidly hardening material 7 that has been dissolved in water is poured into the gap in the inner space, and it is allowed to solidify in a matter of minutes.The base body 4 and the pole 1' are integrated as shown in Fig. 5, and then the base body 4 and the pole 1' are integrated, and then the material is placed on the ground for shaping. This is a construction method in which cement 3' is poured.

Unlike the above-mentioned embedding method, this method solidifies most of the embedded part of the pole 1 with the rapidly hardening material 7, so the pole 1' immediately becomes a stable erected state and is poured into the ground. Cement for shaping 3'
The sign board can be installed before it hardens.

This method, which can significantly shorten the construction time, requires a large labor burden on the worker mainly during the driving process, and requires the use of a steel base 4 and rapid hardening, which were unnecessary with the above-mentioned embedding method. The use of the solidified material 7 also had the disadvantage of high material costs.

The reason why the burden is imposed on the worker when driving this steel base body 4 is that the cylindrical body 4 is
The soil entering from the tip of the cylinder body 5 is compressed by the inner wall of the cylindrical body 5, which acts to prevent new soil from entering, so that the penetration resistance of this part gradually increases. This is due to the combination of the frictional resistance with the soil that occurs in the process.

In particular, consideration has been given to the case where the foundation body 4 is driven at an angle for some reason, and the thickness of the cylinder body 5 is designed so that even in that case, the pole 1' can be corrected vertically within the cylinder body 5 and erected. Since a sufficient margin is expected for , it is extremely difficult to reduce the penetration resistance.

Moreover, the rapidly hardening solidified material 7 used here is composed of almost the same main components as quick-drying cement,
It contains special additives that allow it to harden in minutes, much faster than quick-drying cement, and is several times more expensive than quick-drying cement.

In this driving method, in order to fill the large gap between the pole 1' and the cylindrical body 5, the expensive rapidly hardened solidified material 7 is used.
A large amount of water had to be used, and because the aqueous solution easily permeated into coarse-grained soil, the amount was sometimes far greater than the amount normally required.

In view of the deficiencies of the conventional pole erection method, the present invention aims to shorten the time required for construction, reduce the labor borne by workers, and further reduce the cost of materials used for erection. was suggested.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 6 shows a steel base body 8 used in the present invention, in which a plurality of resistance plates 11 are formed around a cylindrical body 9 having a tapered fixing portion 10 at its tip.

Unlike the base body 4 of the conventional method described above, this base body 8 is fixed by receiving the lower end of the pole to be erected with the tapered fixing part 10 of the cylinder body 9. Therefore, the length of the cylinder body 9 is It is not necessary to match the installation size of the pole, and since it is not a rapidly solidified material that integrates the cylindrical body 9 and the pole, the thickness of the cylindrical body 9 only needs to be thick enough to allow the pole to be inserted easily. Accordingly, the size of the resistance plate 11 is also much smaller than that of the base body 4 used in the conventional method.

Also, even if the lower end of the pole is crushed and deformed due to the tapered fixing part 10 of the pole, or a defective pole that is out of standard size, the fixing part 1
0, the lower end can be securely fixed, and even if the base body 8 is driven in at an angle, it can be vertically fixed within the range allowed by the small gap between the cylinder body 9 and the pole. The lower end of the modified pole can be supported and fixed.

FIG. 7 shows a drilling tool 12 for drilling a pilot hole, in which a drilling ring 13 at the tip and a guide tube 14 at the rear are integrally formed on the same axis via a connecting plate 15 having a radial cross section.

A rod hammer 16 is loosely inserted into the guide tube 14 in the figure, and when driving, the rod hammer 16 is slid inside the guide tube 14 and hits the blocked tip, and when pulling out, the rod hammer 16 is inserted into the guide tube 14.
The pull-out plate 18 at the upper end of the guide tube 14 is struck from below with a bump 17 formed at the upper end of the guide tube 14.

FIG. 8 shows a driving tool 19 for driving the base body 8 to the deepest part of the guide hole, and a small diameter portion 20 that fits into the cylinder 9 of the base body 8 is formed at the tip with a sharp tip. , the upper part passes through the step 21 and the tapered part 22 to the drilling ring 13 of the drilling tool 12.
A cylindrical portion 23 having a larger planned diameter is formed inside the cylindrical portion 23, and the drilling tool 1 is aligned with the same axis inside the cylindrical portion 23.
A guide tube 14' having the same shape as that formed in 2 is formed, and the driving tool 19 can be driven in and pulled out by operating the bar hammer 16.

The present invention configured as described above first includes a drilling tool 1.
The construction state begins when the pilot hole is drilled in step 2.

As shown in FIG. 9, a hole 24 is dug at the ground level into which cement for shaping is poured, and a guide pipe 14 is inserted from the bottom of the hole 24.
The punching tool 1 is struck by hitting the rod hammer 16 inserted into the hole.
2, and the soil 2 that has passed through the drilling ring 13 at the tip
When the soil 25 is piled up, it is pulled out and this soil 25 is removed.

By repeating this driving and pulling operation, a pilot hole 26 having a size comparable to the penetration size of the pole to be erected is created as shown in FIG. 10.

Next, the base body 8 described above is fitted into the small diameter portion 20 at the tip of the driving tool 19, the upper step 21 is brought into contact with the upper end of the base body 8, and the bar hammer 16 inserted into the drilling tool 12 is driven. The tool 19 is inserted into the guide tube 14', and the base body 8 is driven into the guide hole 26 and installed at the deepest part of the guide hole 26 as shown in FIG.

During the driving process, the wall of the pilot hole 26 is strongly pressed down by the thick tapered part 22 and the cylindrical part 23 formed on the driving tool 19, making it difficult for the soil in this area to collapse, thereby preventing the foundation installed at the bottom of the hole. A situation where the body 8 is buried is prevented.

Furthermore, after pulling out the driving tool 19, a considerably enlarged insertion hole 26' is created above the base body 8 as shown in FIG. 12, and this makes it difficult to insert the pole 27 in the next step. Make it easier.

After inserting the pole 27 into the enlarged insertion hole 26' and bringing its lower end into contact with the fixed part 10 of the base body 8, the water-soluble rapidly solidified material is placed in a flexible bag such as a plastic bag. The filling material 28 is formed by putting it into the body and sealing it to prevent air bubbles from forming, and pressing the filling material 28 while wrapping it around the pole 27 at the top of the insertion hole 26' as shown in FIG. , Paul 2
7 and the insertion hole 26'.

The pole 27 is fixed at a position close to the ground by the filling material 28 that hardens at a rate of minutes, and the lower end is fixed by the fixing part 10 of the foundation 8 to maintain a stable erection condition. Therefore, the sign board can be attached without waiting for the shaping cement 29 poured into the hole 24 at the ground level to harden, and the construction can be completed in a single hour. (Fig. 14) At this final stage, after embedding the filler 28, it is better to pour the shaping cement 29 from above before the filler 28 hardens, so that both will blend better and the construction time will be shortened. It's nice to be able to do it.

In the present invention, which is constructed as shown in FIG. 14, the base body 8 is significantly smaller than the conventional driving method shown in FIG. It has sufficient strength.

In other words, there is a large difference in the hardness of the work between the part of the pole 27 that is embedded close to the ground and the deepest part, and the deeper the resistance plate 11 is, the more effectively the resistance plate 11 grips the work, and the present invention is most applicable. Rooting depth obtained: 500
In the case of the relatively lightweight sign pole 27, which is around 1.2 mm in size, the cement 29 used for shaping the ground portion has a large effect on the construction depth, and if necessary, the pole 2
If the lower end of the pole 7 is securely fixed, the ground portion will be solidified with the cement 29 for shaping, and the erection strength of the pole 27 will be maintained sufficiently.

As described above, since the base body 8 used in the present invention is small and the pilot hole 26 is drilled prior to its driving, the penetration resistance is significantly reduced and the operator does not have to put in the arduous labor of the conventional driving method. relieved of the burden.

Furthermore, by using the filler 28 made of the rapidly hardening solidified material 7, the present invention was able to significantly shorten the construction time required by the conventional embedding method.

Furthermore, among the various materials required for construction, the base body 8 has become significantly smaller, and the amount of rapidly hardened solidified material that forms the filler 28 has become much smaller, resulting in lower material costs. It has now become possible to reduce the cost significantly.

[Brief explanation of the drawing]

The drawings relate to the "pole erecting method" of the present invention; FIGS. 1 and 2 are side views of the conventional embedding method, FIG. 3 is a perspective view of the conventional embedding method, and FIG. 4 and 5 are sectional views similarly seen from the side. 6 to 8 are perspective views according to an embodiment of the present invention, FIGS. 9 to 12 are side views thereof, and FIGS. 13 and 14 are sectional views similarly seen from the side. It is. 1, 1'... Pole, 2... Resistance member, 3, 3'... Cement, 4... Base body, 5... Cylindrical body, 6... Resistance plate, 7
...rapidly hardened solidified material, 8...base body, 9...cylindrical body, 10...
Fixed part, 11...Resistance plate, 12...Drilling tool, 13...Drilling ring, 14, 14'...Guide tube, 15...Connecting plate, 1
6... Bar hammer, 17... Knob, 18, 18'... Drawing plate, 19... Driving tool, 20... Small diameter part, 21
...step, 22...tapered part, 23...cylindrical part, 24...
hole, 25...soil, 26...leading hole, 26'...insertion hole,
27...pole, 28...filler, 29...cement.

Claims (1)

[Claims] 1. A support member that drills a pilot hole in the ground and receives and fixes the lower end of the pole at the tip of a driving tool consisting of a cylindrical portion with a planned outer diameter larger than the pilot hole and the outside diameter of the pole to be erected. and a plurality of resistance plates is removably fitted and driven into the deepest part of the guide hole, and then pulled out from the insertion hole created above the base body by the driving tool. The pole is inserted, its lower end is brought into contact with the support member of the base body, and the water-solubilized rapidly solidified material is sealed in a sufficiently flexible bag with a filling material. filling the gap between the pole and the surrounding soil at the top of the insertion hole;
A method for erecting a pole, characterized in that cement for shaping is then poured into the part.