JPH03275815A - Method and device for erecting electric pole having both self-erecting ability and countermeasure for sink prevention - Google Patents

Abstract

PURPOSE:To enable self-erecting ability to be compatible with sink prevention by a method wherein a resistance plate body is forced to pass through a support rod on the periphery of a foundation pipe, screwed in an earth auger hole, and unfolded, and an electric pole is inserted to inject a filler in a gap, and a remaining part is filled with cement. CONSTITUTION:An earth auger hole having length matching that of a foundation pipe 10 is pre-excavated, a pipe 10 is screwed in, and both sides of the pipe 10 are excavated to form side holes 20. A resistance plate body A having a folded resistance plate 2 is forced to pass through the both sides of the pipe 10 along a support rod serving as a guide and installed. The resistance plate 2 is unfolded approximately in a 180 deg. arc. Excavated surplus soil is charged from the upper side of the pipe 10. An electric pole 23 is inserted and fixed to a stationary plate 15, and a gap between the electric pole 23 and the pipe 10 is filled with a filler 24 in a state that the standing upright state of the electric pole 23 is established. A remaining part is filled with cement to cure con. crete 25 to refill the side holes 20. This method enables selferecting ability to be compatible with sink prevention.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention prevents the subsidence of installed utility poles in soft geology where they may subside due to their own weight and the pressure of overhead wires, and at the same time maintains their upright status. This invention relates to a method and device for planting trees so that they can stand on their own without relying on branch lines or the like.

[Conventional technology]

The attached drawings show the prior art related to this TEAR light! @ As shown in the side view in Figure 17 and the plan view in Figure 18, there are utility poles (3
For the underground part of 0), two resistors (31) made of concrete or logs are placed in the underground part approximately 50 cm from the ground surface, sandwiching the utility pole from both sides of the utility pole (30). , the technology of fastening these using bolts and nuts (32) has become common.

In the above conventional technology, the resistor (31) is placed 50cm below the ground surface.
The reason for locating it at around lI+ is, for example, to ensure that if it is on a road, it will not interfere with water supply or gas management installations, and if it is on agricultural land, it will not interfere with the operation of agricultural machinery. This is a consideration to make the situation more comfortable.

[Problem that the invention seeks to solve]

The strata that require this kind of construction are soft strata, and as a general rule, the groundwater level is high, and in most cases, the ground is 20 cm to 30 cm underground.
Spring water comes out at a depth of about cm.

Therefore, it is not easy to excavate around the utility pole (30) by the area of the resistor (31), and the work to connect the resistor (31) at a distance of 50 cm must be done while draining the water, as the entire work will be done underwater. Moreover, since the water is muddy, it is impossible to drain it with a pump, so most of the work is done by pumping it out with buckets.

Furthermore, since it is such a difficult task, there is a limit to the size of the resistor (31).

Furthermore, the utility pole (30) is a gentle cone whose diameter gradually decreases from the base to the top, and a resistor (30) is attached to the cone.
When 1) is fastened, the resistor (3I) is pushed up in the direction of the smaller diameter, so it will loosen over time after construction, and this aspect cannot be a more sufficient measure to prevent subsidence. .

For the purpose of preventing utility poles from toppling over, the tops of utility poles are connected to the ground surface diagonally by branch wires at key locations.

The support point on the surface of the ground is determined by the tensile strength of the anchor that is cast into the ground, but there is a limit to the tensile strength of the anchor in geological strata that will cause the pole to sink without 11IfWi. As a countermeasure, emphasis is placed on the independence of the utility pole itself without relying on branch wires, and by taking this into consideration, a technology is needed that can accomplish both the independence of the utility pole and the mission of preventing subsidence.

Measures to solve problem c] In the above, for the independence of the utility pole, either increase the amount buried underground by the amount allowed by Tonosho calculations, or increase the diameter of the underground part by the necessary amount. whether to convert it into a
Alternatively, a combination of both methods may be sufficient.

However, this method is not a measure to prevent subsidence,
To prevent subsidence, it is necessary to increase the resistance force in the vertical direction by using utility poles, and if this method eliminates underwater work etc., all measures are taken mechanically when retiring to the ground surface. The only option available is to expand a large resistor that is integrated with the utility pole in the underground portion of the utility pole and is several times the area of the base of the utility pole.

With the above, the present invention is a technology that can simultaneously solve both the independence of utility poles and prevention of subsidence.

[Function and Examples]

The present invention will be described in detail below with reference to the accompanying drawings.

In the side views of Figures 1 and 3 and the respective plan views of Figures 2 and 4, (1) is a board made of a circular steel plate, and a support pipe (9) made of a hollow pipe is attached to one end of the board. The end faces of the two are made to coincide with each other, and they are fixed integrally through the substrate (1), and a rotary shaft (3) is attached to the center line of the substrate (1) at the end opposite to the support pipe so as to be rotatable. Furthermore, a resistance plate (2) is inserted into the rotating shaft (3) so as to overlap with the substrate (1), and the shape of the resistance plate (2) is similar to that of the substrate (1). ), for a disk with the same shape as
The circumferential surface on the side of the support pipe (9) has a notch shape with the rotation axis (3) as the base point and the distance from the support pipe as the radius, and this is the contact surface with the rotation axis (3). The rotating shaft (3) and the resistance plate (2) are completely fixed together.

(5) is a support plate, which is a rectangular steel plate bent in a U-shape in the longitudinal direction, and one end is fixed and integrated with the support pipe (9) at a slightly upper part of the resistance plate (2), and the other side is fixed and integrated with the support pipe (9). The rotary shaft (3) passes through the rotary shaft (3) so that it can rotate freely, and its end face is machined to have the same circumference as the substrate (1). 1), and a regulating washer (6) of the shape specified in the drawing of the bottom surface of the board (1) according to FIG. 5 is fixed to the protruding part, and the regulating washer (6) In order to regulate the rotation of (3) by a certain amount, a regulating screw (
7) is fixed.

The upper side of the rotation shaft (3) is made to protrude a certain amount above the support plate (5), and the protruding upper side is cut into an engagement part (4) so as to be engaged with a rotation tool in the future. , and support plate (5
) on the rotation shaft (3) located on the bottom surface of the washer (
8) and are firmly integrated as described above to form the resistance plate (A).

If the above resistance plate body (A) is in the closed state, the resistance plate (2) will be housed within the circumference of the substrate (1), but the rotation axis (
3) by turning it 180 degrees to the right, the integrated resistance plate (
2) is also expanded as shown in Figs.
As shown in the bottom view of the board (1) in the figure, it has a structure in which it is locked with a regulating screw (7).

Next, the side view in Fig. 6 and the plan view in Fig. 7 relate to the foundation pipe. (1o), and the upper side is equally cut out on both sides on the center line to form a locking groove (11), and a cutting blade (12) is fixed to each of the four equal parts of the circumference of the tip. Due to its vertical length, when the resistance plate body (A) is connected to it underground in the future, the support rod holder (13) is fixed to each bisecting point on the circumference of the part where the position will be about 50 cm from the ground surface. However, a support rod (14) is fixed to each of the support rod holders (13), and each of the support rods (14) is attached to a foundation pipe (
The upper side is positioned slightly lower than the upper side of 1o).

Next, referring to the side view in FIG. 8 and the plan view shown in FIG. 9, this relates to the stationary plate (B), and (15)
is a stationary plate bent in a U-shape, and on both ends thereof, hanging rods (16) whose rear ends are bent into sleeve portions (17) and to which engagement rods (18) are fixed are fixed and integrated. In addition, the length of the hanging rod (16) is appropriate for the amount of utility poles buried in the foundation pipe (1o).

Each member explained above is a foundation pipe (10
), a closed resistance plate (A) as shown in Fig. 1 is passed through the support pipe (9) and placed on the support rod holder (13), and then Now, as shown in Fig. 11, insert the stationary plate (B) as shown in Fig. 8 into the foundation pipe (10), and insert the engagement rod (18) into the support pipe (9). This completes the joining of the members.

As understood from the above, the stationary plate (B) of the stationary plate body (B)
The horizontal length of 15) is that the stationary plate (B) is finally connected to the foundation pipe (
10) should be able to be passed through.

Next, the construction procedure of the present invention will be explained.

The present invention uses an earth auger to excavate an earth auger hole (19) with a depth corresponding to the length of the foundation pipe (10) as shown in Fig. The pipe (10) is screwed in, and this work is done by fitting a special tool into the locking groove (11) cut in the upper side of the foundation pipe (10), and fitting the tip of the earth auger into this. It is screwed in, but
The foundation pipe (10) that is screwed into the earth auger hole (
Although the diameter is slightly larger than that of 19), the cutting blade (12) at the tip advances while cutting the side wall of the earth auger hole (19), so the diameter is slightly larger than that of the foundation pipe (10). Since the frictional resistance with the soil is extremely small, and the frictional resistance of the soil against the inside is non-existent, the entire screw can be easily screwed in while pressing with an earth auger.

Once the upper side of the foundation pipe (10) is screwed in until it is slightly below the ground surface as shown in Figure 13, it is time to screw in the support rods on both sides of the center line of the foundation pipe (10) as shown in Figure 14. 14) using an earth auger on both sides of the side hole (2).
0).

However, it is impossible to excavate the side hole (20) with the earth auger before the foundation pipe (10) is installed, that is, in the state shown in Fig. 12, and the reason is that the screw blade of the earth auger Since it has the property of escaping in the direction of least resistance, it is necessary to drill an earth auger hole (
This is because the side hole escapes toward 19) and an accurate side hole as shown in FIG. 13 cannot be excavated.

At the place where the side hole (2o) was excavated in this way, Jl! As shown in Fig. 14, first, the resistance plate body (A) with the resistance plate (2) in the state shown in Fig. 1 in the closed state is attached to the support rod (2) in accordance with Fig. 10.
14) are used as guides to pass through and install on both sides of the foundation pipe (1o), and each resistance plate (2) is rotated 180 degrees by fitting the rotation tool (21) onto the rotation shaft (3). Each will expand.

In this way, following the steps shown in Figure 11, the stationary plate (B) is inserted as shown in Figure 15, and the excavated soil is poured in from the upper side of the foundation pipe (1o) to fill the cavity below the stationary plate (15). Although it is filled as soil (22), this operation may be performed before the stationary plate (B) is introduced.

Next, the utility pole (23) is inserted and placed on the fixed plate (15), and while establishing the upright state of the utility pole (23), it is inserted into the gap between the utility pole (23) and the foundation pipe (1o). While injecting filler l (24) such as sand or small gravel, compact it and place it 10cm to 15cm+++ from the top of the foundation pipe (lO).
Fill the remaining part completely with cement, harden it into concrete (25), and fill the remaining part with cement (25).
) will be backfilled and the ground surface will be cleaned up and all construction work will be completed.

The above is a case where the groundwater is not disturbed much even though the geology is soft, but if the groundwater layer is disturbed, the work procedure will be slightly different. 19), the side walls collapsed one after another, making it impossible to excavate.

Therefore, in such cases, the earth auger hole (19) is not excavated and the foundation pipe (10) is screwed in immediately. Due to the frictional resistance of the soil, it is impossible to screw in the entire screw as it is, so first
At the place where it is screwed in, the locking groove (
Remove the screwing tool engaged with the foundation pipe (11) to completely open the foundation pipe (10), screw in the earth auger to remove the soil filled up to the tip of the foundation pipe (10), and then open the foundation pipe (10) again. 10), and in this way, repeating screwing and removing the soil in the pipe, it becomes a means to finish screwing the entire amount.

Furthermore, even when installing the resistor plate (A) shown in Figure 13, the groundwater that gushes out will submerge up to about 30cm+++ below the ground surface, so the rotary tool (21) is used to open the resistor plate (2). ), it is difficult to figure out how to fit them together.

Therefore, consideration must be given to allowing the rotating tool (21) to be lowered while being already fitted and integrated with the stationary plate (B) before the rotating shaft (3) is submerged in water.

The present invention is described in such a way that support rods (14) are connected to the basic vibrator (10) at two equal points on the circumference, and the resistance plate (A) is attached along these points. This can be expanded as needed by increasing the number of support rods (14) and resistance plates (A) either in the third direction or in the fourth direction as shown in Fig. 19. As a result, the subsidence resistance is greatly strengthened.

Furthermore, since the resistive plates (2) penetrate into the undamaged soil and expand, they are even more effective in terms of self-sustainability when integrated with the foundation vibrator (10).

〔Effect of the invention〕

The effects of the present invention are listed below.

1. About independence B. The diameter and length of the foundation vibrator (10) have been expanded enough to achieve the purpose according to Tonosho's calculations, and the electric pole is used as a fence pole, so the self-sustainability is sufficient. .

The resistance plate (2), which penetrates and expands into the undamaged soil, is integrally connected to the foundation vibration (10), thereby further increasing the self-supporting ability.

2. Regarding prevention of subsidence A. Electrical pole (23) and the resistance plate body expanded on both sides (
A) is not directly connected, but is connected via the foundation vibration (10) that is reliably integrated with the utility pole (23). This is extremely safe and reliable, unlike the unreasonable method of forcibly fastening the resistor (31), which is intended to move in the radial direction, with bolts and nuts (32).

Furthermore, the resistance plate (A), which can be increased in weight in 3 directions and 4 directions as required, and connected by 4 degrees, has resulted in a large yield strength that could not be expected with the prior art.

3. Regarding construction methods, it is an important factor to be able to deal with both independence and prevention of subsidence at the same time.

All of the work at the mouth 8 is performed using an earth auger, and there is no need for any underwater work, so the burden on the operator is reduced tremendously.

[Brief explanation of the drawing]

FIG. 1 is a side view showing the resistance plate (2) of the resistance plate body (A) in a closed state, and FIG. 2 is a plan view thereof. FIG. 3 is a side view showing a state in which the resistance plate (2) of the resistance plate body (A) is expanded, FIG. 4 is a plan view thereof, and FIG. FIG. FIG. 6 is a side view of the basic vibrator (10), and FIG.
The figure is a plan view thereof. FIG. 8 is a side view of the stationary plate (B), and FIG. 9 is a plan view thereof. Fig. 10 shows the state in which the resistance plate (A) is connected to the basic vibrator (10), and Fig. 11 shows the state in which the stationary plate (B) is connected to Fig. 10. It is. FIG. 12 to FIG. 16 and FIG. 19 are explanatory diagrams regarding the construction state of the present invention and its effects. FIG. 17 and FIG. 18 are explanatory diagrams related to the prior art. 1. Substrate 2. Resistance plate 3, rotation shaft 4, engagement part 5, support plate 6, regulation washer 7, regulation screw 8, washer 9, support vibe 10, foundation pipe 11, locking groove 12, cutting blade 13, support rod holder 14 , support rod 15, fixed plate 16, hanging plate 17, sleeve part 18, engagement rod 19, earth auger hole 20, side hole 21, rotary tool 22, filling soil 23, utility pole 24, filler 25, concrete 30 , utility pole 31, resistor 32, bolt/nut A, resistor plate B, stationary plate or more

Claims (1)

[Claims] 1. Regarding the self-sustainability of utility poles in soft spring strata and means to prevent subsidence, a foundation pipe (10) is provided with a hollow pipe having a diameter and length that can withstand earth pressure calculations as an underground foundation for a self-supporting utility pole.
year. Either press and screw the foundation pipe (10) into the earth auger hole (19) that can be excavated in advance and install it underground, or alternatively, after screwing it to a certain length, remove the soil that fills the pipe. , complete the installation of the entire amount by repeating the operation. After digging side holes (20) with an earth auger for each of the support rods (14) attached to the bisecting point to the quartering point on the circumference of the installed foundation pipe (10), The resistance plates (A) are inserted and lowered into the support rod (14) and placed on the bottom of the side hole (20) to expand each resistance plate (2). Next, the stationary plate (B) is inserted into the foundation pipe (10) and connected to the foundation pipe (10), and then the stationary plate (B) is inserted into the foundation pipe (10).
After either filling the cavity in the pipe at the lower part or filling the cavity before passing through the stationary plate (B), insert the utility pole (23) and place it on the stationary plate (B). The electric pole (23) and foundation pipe (1
0), filler (24) is injected and compacted while establishing the upright state of the utility pole (23), and the foundation pipe (1) is
0) A method of planting utility poles that has both independence and subsidence prevention measures by hardening the necessary amount of concrete (25) near the top. 2. A perfect circular steel plate is used as the base plate (1), and the support pipe (9) is attached to the base plate (1) so that its one end surface and its outer circumference are aligned.
) and is fixed integrally through the opposite substrate (1).
The rotation shaft (3) is loosely inserted into the end, and the required amount is made to protrude from the lower side of the board (1), and the regulation washer (6) is fixed to the protrusion, and the regulation washer (6) is engaged with the rotation shaft (3). Fix a regulating screw (7) to the lower side of the board (1) where it will fit, and then make a circular steel plate identical to that of the board (1) and attach one end of it to the rotation shaft (
A resistor plate (2) with a required amount of notches on the opposing circumferential surface is attached to the substrate (1) so that it does not interfere with the support pipe (9) when rotating with the rotation axis (3). ) on the rotation shaft (
3), and furthermore, one end of the support plate (5) is fixed to the support pipe (9) so that it is located slightly above the resistance plate (2), and the other end is loosely passed through the rotation shaft (3). Fix the washer (8) to the rotation shaft (3) from the bottom side, and then attach the support plate (5).
The upper side of the rotating shaft (3) that protrudes more is machined into the engaging part (4), and with this, the rotating shaft (3) is rotated 180 degrees to the right to expand the maximum resistance surface of the resistance plate (2). Open it and stop it properly using the regulating washer (6) and regulating screw (7), and use this as a resistance plate (A). Also, a foundation pipe (10) made of a hollow pipe that houses a utility pole.
Attach support rods (14) approximately 50 cm from the top of the bisecting point, or if necessary, the third or fourth dividing point on the circumference.
Fix the support rod holder (13) that is integrated with the. Furthermore, hanging rods (16) having an engagement rod (18) at the rear end are fixed to both ends of the stationary plate (15), the length of which is suitable for the underground depth of the utility pole. With the above, the foundation pipe (10) can be equipped with the necessary amount of resistance plates (A), and the stationary plate (B) can be stored and locked therein. A utility pole planting device that combines safety and subsidence prevention measures.