JPS59109673A - Installation of utility pole - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] This invention aims to facilitate construction, prevent sinking of holes or collapse, and improve reliability of construction when installing utility poles mainly on mountainous slopes. This is related to the construction method used to install utility poles.

Conventionally, in order to install utility poles on mountainous slopes or other locations where it is inconvenient to transport machinery, lumber, etc., a predetermined number of holes for burying are dug in advance, each utility pole is transported by helicopter one by one, and the poles are placed perpendicularly to the poles. Insert it into the hole sequentially from the bottom while hanging it,
When the bottom of the pole reached the bottom of the hole that had been dug in advance, it was common practice to release it from the helicopter and bury it completely.

However, according to this construction method, it often takes several days from digging the hole to burying the utility pole, and during this time, rain, etc. (melting snow after snowfall) may cause the pole to collapse, or earth and sand may flow in and cause the hole to collapse. When the pole is buried or the pole is suspended, the edge of the hole may collapse and the soil enters the hole, creating problems such as the need to excavate again and the length of embedment as designed cannot be obtained. .

However, in this invention, the protective knot is inserted into the hole for burying the utility pole, so there is no risk of the hole collapsing even if it rains, and when the utility pole is hung, it acts as a guide and protects the edge of the hole. , the above-mentioned conventional problems have been solved.

Embodiments of the present invention will be described below based on the drawings.

First, a hole for burying a utility pole/Z utility pole is to be installed to a specified size (as shown in Figure 1, the inner diameter is considerably larger than the outside diameter of the utility pole because it is usually dug by hand), and then the hole is protected. tube λ
Please insert it. In this case, the upper end of the protective tube should protrude to the ground surface. The amount of protrusion of the protective node λ should be such that earth and sand do not flow in during rainfall (for example, about 20 cm). Therefore, the protection tube λ is made longer than the depth of the hole, and is made of synthetic resin or metal with an inner diameter slightly larger than the outer diameter of the base of the utility pole 3 to be buried (to the extent that it is easy to insert). It is a cylindrical body, and its upper end 2a expands into a funnel shape.

After inserting the protection tube B-2 into the hole as described above, backfill soil between the outer wall of the protection tube λ and the inner wall of the hole and securely install the protection tube. figure).

Next, the utility pole 3 placed below the base 2 is suspended vertically from a helicopter, gradually lowered, and the utility pole 3 is inserted into the protection tube as a guide for the inner surface of the upper end 2a of the protection tube. Telephone pole 3
When the bottom end of the hole reaches the bottom of the hole, cut it off with the helicopter,
The wood will be cleared and utility pole 3 will be installed and fixed.

According to the embodiment described above, since the protection box 2 is buried with its upper end core a protruding toward the ground surface, it is possible to completely prevent earth and sand from entering the hole/inside during rain. In addition, the upper end λa of the protective tube λ is expanded into a funnel shape, and the inside of the protective tube λa is used as a guide to insert the 3 utility poles, making it extremely easy to insert the utility pole and preventing the hole edge from collapsing due to contact with the utility pole.
I can do that.

It should be noted that it is not essential that the upper end of the protective tube λ protrudes above the ground surface, or that it is funnel-shaped and inserted into the utility pole as a guide on its inner side. Even when the height is increased, there is an effect of preventing the hole from collapsing due to the lower end colliding with the periphery of the hole when the utility pole is inserted.

However, there are cases where the upper end of the protective section does not extend above the ground surface, when there is no risk of rain, when a telephone pole is inserted immediately after digging a hole, or when a cover is attached to a protective tube.

Further, in the above embodiment, the protection tube 2 is left buried, but the protection tube 2 may be removed after the utility pole 3 is inserted, and then the utility pole may be wood-trimmed. In this case, as shown in Fig. 3, a semi-cylindrical half-ja.

After using the divisible protection tube 3 constructed by combining the left side and pulling it out of the ground, it is divided into two parts and removed from the utility pole 3.If the 1-0 protection tube is removed, the protection tube can be reused. It is possible and economical.

Incidentally, the insertion of 9 into the protection node of the utility pole does not necessarily have to be carried out by hanging from a helicopter, nor is the present invention limited to construction on mountainous slopes.

1- That is, according to this invention, since the protective tube is buried in the hole for embedding the utility pole, there is no fear that the hole will collapse or be buried due to the inflow of earth and sand due to rain or the like.

In addition, there is no risk of the lower end of the pole colliding with or coming into direct contact with the edge of the hole when burying the pole (it is protected by a protective tube).
There is no risk of the edge of the hole collapsing when burying the utility pole. Therefore, the utility pole can be installed correctly at the designed depth, which increases reliability after installation, and also improves the reliability of the installation. Re-digging 1 - Since it is not necessary, there are various effects such as being able to prevent waste of time, labor, cost, etc.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a hole drilled in an embodiment of the present invention, Fig. FIG. 3 is an enlarged perspective view. /... Hole Ω, S... Protective tube 3... Utility pole patent applicant Yoshisada Saito Attorney Tadashi Suzuki Next procedural amendment (Responsive Patent Office Commissioner Kazuo Wakasugi 1, Case) Indication 1981 Patent Application No. 21 Relationship with ggoo case Patent applicant 4, agent (zip code 160)

Claims (1)

[Claims] l A utility pole characterized in that a hole for burying a utility pole is excavated, a retaining tube is inserted and installed into the hole, and then the utility pole is inserted into the protection 11') and is fully buried. Installation method λ The protective knot is inserted and installed by making its upper end protrude to the ground surface by a predetermined length.3 Installation method for utility poles according to claim 1 The protective knot is inserted and installed immediately after drilling the hole. patent jj
j'l The installation method for utility poles described in Claim 1. The protection section has an upper end that expands into a funnel shape.
Installation method for utility poles described in section 5 The protection tube is a semicircle T51'
The utility pole installation method B described in Claim 1, which is composed of the following two combinations: The insertion and installation of the protective clause is temporary installation at the time of insertion of the utility pole, or permanent installation together with the utility pole. Claim 1
Installation method of utility poles described in section