JPH0733751B2 - Temporary construction method of building hole for utility pole - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a utility pole building hole for performing a preliminary survey of a place where a utility pole is to be built and providing a marking that can be constructed at an appropriate place in accordance with the design of the line of the utility pole. Regarding the temporary construction method.

[Prior Art] Conventionally, at a place where a utility pole is planned to be constructed, as shown in FIG.
Vertical hole a (about 1.
5 m), the metal probe rod c is inserted into the bottom a ′ of the vertical hole a to inspect for an obstacle d such as a buried pipe, and then the vertical hole a and the stairs b are buried again. Vertical hole a
The marking pile e was driven and placed at the center position as shown in FIGS. 7 (A) and 7 (B).

At this time, several dotted lines on the lower side of FIG. 7 (B) indicate confirmation marks by the probe rod c.

In this way, the construction line of the utility pole is marked in advance, but one week at the earliest before the actual construction period,
Since there is an interval of about one year or more at the latest, it is likely that the marking piles e are misaligned or misaligned due to weather, landslides, or other external factors.

Therefore, when no trouble occurs, the vertical elongated hole a formed by the earth auger 6 is appropriately drilled as shown in FIG. 8 to facilitate the installation of the utility pole. As shown in Fig. 9, the rotating blade of the earth auger damages the obstacle d due to the position of the earth auger due to the deviation and the deviation in the cutting direction. If this is a telephone line, much effort is required to repair it. And time were essential.

[Problems to be Solved by the Invention] As described in the related art, when there is a considerable time lag between the time of setting the utility pole line and the time of actual construction,
Often, the marking pile e is easily misaligned and the setting of the earth auger tends to be misaligned, which makes the vertical elongated hole a inclined easily. Since the situation is vertically and horizontally crossed, there was a problem that even a slight deviation would cause serious damage.

[Means for Solving the Problems] The present invention has been made in view of the above problems of the conventional technique, and its object is to provide a vertically elongated hole a.
The cylindrical body 1 having a thickness and a length corresponding to the above is formed in advance, the cylindrical body 1 is embedded in the vertically elongated hole a, and is extracted when the utility pole is drilled by the earth auger 6, so that the preset vertically elongated hole a is surely formed. It is preserved so that accurate building columns can be performed.

[Operation] Since the cylindrical body 1 having the same size as that of the vertically elongated hole a is prepared in advance and embedded in the vertically elongated hole a, the position of the marking cylindrical body 1 can be changed even if the landslide due to surrounding rainwater or the like causes some damage. Since it does not move and tilts little, it is possible to always indicate an accurate position and direction.

[Examples] Examples will be described with reference to the drawings.

FIG. 1 is a perspective view of a cylindrical body 1 to be embedded in a vertically elongated hole a of the present invention, which has a lid body 2 and a bottom body 3 and is slightly thin as a whole, so that it can be easily extracted from the soil. is there. Also,
The lid body 2 and the bottom body 3 are provided with pores 4 and 4, respectively, in consideration of the flow of air at the time of embedding and extracting. 5 is a hook.

As shown in FIGS. 2 (A) and 2 (B), the cylindrical body 1 is buried by filling the vertically elongated hole a almost completely, and only the stair b portion is restored. As shown in the third drawing, the vertically elongated hole a is reproduced in a substantially complete form, and therefore, further drilling by the earth auger 6 is accurately performed (fourth).
In the figure, damage to the obstacle d can be reliably avoided.

[Effects of the Invention] As described above, according to the present invention, by burying a cylindrical body corresponding to the same hole in a vertically elongated hole for searching, which is dug into a utility pole line, it is possible to actually realize a corresponding period until the building pillar period. There is little concern that the marking cylinder will be damaged even after a certain period of time, and even if the cylinder is pulled out during construction, it is not necessary to re-drill the vertical elongated hole. It is possible to pierce it, it is effective in surely preventing the danger to obstacles, and although there is complexity that the cylinder must be prepared in advance, all the cylinders are used one after another. However, since it can be used multiple times many times, there is some inconvenience in transportation, but it is not difficult compared to the actual ease of construction work, and the work is smooth and the construction pillar is secure. Very effective in sex.

[Brief description of drawings]

FIG. 1 is a perspective view of a cylinder used in the present invention, and FIGS. 2 (A) and 2 (B) are plan views and longitudinal side views of a hole in which a cylinder is embedded in a vertically elongated hole to provide a sign. Figures and 3 are vertical side views without the cylinder with the same vertical holes, Figure 4 is a ground auger installation drawing, Figure 5 is a side view after installation of utility poles, and Figures 6 (A) and (B). Is a plan view and a vertical sectional side view showing a conventional vertically elongated hole digging state, and FIGS. 7 (A) and (B) are plan views and a vertical sectional side view in which a marking pile is driven into the conventional vertical elongated hole. Partial vertical sectional side view showing a conventional digging method with an earth auger,
FIG. 9 is a partially longitudinal side view showing a state where the earth auger is in contact with an obstacle. a ... longitudinal hole, b ... staircase c ... search rod, d ... obstacle 1 ... cylindrical body

Claims (1)

[Claims] 1. A vertical hole having a stairway on the peripheral wall and having a total length of about 1.5 meters is drilled, and a metal probe rod of about 1 meter is further used to search through the required bottom surface for obstacles. After confirming the presence or absence, after inserting a cylindrical body corresponding to the vertically elongated hole into the hole, the step portion is embedded, and the embedded cylindrical body is punched out as a marking for perforating the earth auger. Temporary construction method for utility pole building holes.