JPS6316534B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a subsidence prevention device for existing utility poles.

In response to the increase in demand for electricity in recent years, large-capacity distribution line systems have been promoted, but this gradually increases the weight of the electric wires, resulting in the sinking of utility poles that support these heavy electric wires. , it became necessary to find a countermeasure for this.

However, in order to prevent the sinking of utility poles, when planting a new pole, it is sufficient to install various supports at the bottom of the excavated hole for the pole, but as a measure to prevent the sinking of existing utility poles, Necessary subsidence prevention measures must be taken at the underground portions of utility poles.

Therefore, current utility poles are made of concrete poles, and these concrete utility poles are formed in a considerably tapered shape, and the part buried underground is cone-shaped. Even if an appropriate support is attached to the cone using bolts and nuts, the support will shift the tapered part of the utility pole in the direction of the smaller diameter, and the support will not function as a subsidence prevention function at all. At present, there is no suitable means to prevent subsidence.

The present invention aims to prevent the sinking of existing concrete utility poles by strongly connecting the support and the utility pole at the ground level of the utility pole via a concrete body with strong adhesive properties. It is.

Now, an example of the embodiment of the present invention will be explained with reference to FIGS. The semicircular plate body 2 was fixed to the semicircular notch with its lower end slightly protruding, and both ends of the semicircular plate body 2 were bent. In addition, a plurality of coupling holes 4 are formed at predetermined intervals in the coupling sleeve parts 3.

A plurality of tightening nuts 6 are fixed to predetermined positions on the inner peripheral surface of the semicircular plate body 2, and openings are provided in the semicircular plate body 2 to match the screw holes of these nuts 6. , and 5 is a connecting bolt, which is used to connect opposing resistance plates 1 of the same shape by a connecting rod 8 as a means of reinforcing them when integrally connecting them as described later. 1, and the required number of protrusions were fixed.

Next, FIG. 4 shows a state in which two resistor plates 1 of the same shape facing each other are joined together. When joining, first, the electric pole 10 is held in between and the respective resistor plates 1 are made to face each other. At the same time, the coupling holes 4 of the coupling sleeves 3 of the semicircular plate body 2 fixed to each resistance plate 1 are aligned, and bolts are inserted into the holes and nuts are tightened to integrally couple them into a cylindrical shape. A connecting rod 8 is placed between the connecting bolts 5 provided in the semicircular plate body 2, and the connecting plate 7 is fitted and tightened with the nuts. Screw in the tightening bolt 9 and tighten it tightly with the utility pole 10.
The utility pole 10 and the resistance plate 1 are integrally connected in a temporary state.

In such a state, as shown in FIGS. 5 and 6,
The gap between the cylindrical semicircular plate 2 and the telephone pole 10 is filled with a special cement such as Tuscon (commercially available product name), which is made by adding strong adhesion and rapid hardening to ordinary cement. Since this special cement, Tuscon, hardens rapidly, it begins to harden within a few minutes after being filled, and after that, the hardness increases over time and becomes a strong concrete body 11.
Therefore, the temporarily integrated state of the utility pole and the resistance plate 1 by only the tightening bolts 9 becomes more stable, and the utility pole is completely prevented from sinking.

Incidentally, the planar area of the resistance plate 1 in the above embodiment is
Naturally, the area is calculated from the earth pressure calculation, and the length of the gap between the utility pole 10 and the vertical length of the semicircular plate body 2 and the cylindrical inner diameter surface is:
This determines the volume of the concrete body 11, and the volume of the concrete body 11 is extremely important in maintaining the strength for the integral connection between the resistance plate 1 and the utility pole 10, and must be sufficiently calculated. No.

Furthermore, the portion of the cylindrical semicircular plate 2 exposed above the ground should be installed depending on the situation.

[Brief explanation of the drawing]

Figure 1 is a side view of a resistor plate with a semicircular plate fixed to it, Figure 2 is a plan view of the same as above, Figure 3 is a front view of the same as above, Figure 4 is a combination of two resistor plates facing each other with a telephone pole in between. FIG. 5 is a plan view showing the integrated state, FIG. 5 is a side view of the utility pole and resistance plate integrated through the concrete body, and FIG. 6 is a plan view of the same. DESCRIPTION OF SYMBOLS 1...Resistance plate, 2...Semi-circular plate, 3...Joining sleeve part, 4...
Connection hole, 5... Connection bolt, 6... Tightening nut, 7...
Connecting plate, 8...Connecting rod, 9...Tightening bolt.

Claims (1)

[Claims] 1 A semicircular part is formed at the center of one side of a resistance plate made of a rectangular steel plate, and a semicircular plate body is fixed to the semicircular part with its lower end slightly protruding, and the semicircular plate Connecting sleeves are formed at both ends of the body, and a plurality of tightening nuts are fixed at predetermined positions on the inner peripheral surface.
The two resistive plates constructed in this manner are placed opposite to each other by sandwiching the utility pole, and the connecting sleeves of the semicircular plates fixed to each resistive plate are aligned to integrate and connect these two pieces.
The two resistance plates are further integrated into one via the connecting rod, and the power pole and the resistance plate are integrated by screwing and tightening the tightening bolts into the tightening nuts fixed to the inner periphery of each semicircular plate body. A device for preventing subsidence of a utility pole, characterized in that a concrete body made of strongly adhesive, rapidly hardening cement is installed between the cylindrical semicircular plate and the utility pole while the two are connected.