JPH0343591A - Erecting method for self-supporting electric pole and foundation structure thereof - Google Patents

Abstract

PURPOSE:To improve durability of a foundation pipe, after it is buried, by directly advance-digging a leading hole by a cutting blade traversing an underground water vein simultaneously impeding an inflow of water and a landslide in a side wall of the foundation pipe. CONSTITUTION:A leading hole 3 is excavated with a screw auger 1 stopped to an upper part not reaching an underground water vein 11, and the screw auger 1 is extracted and removed. Next in a top end harpoon 4, a foundation pipe 2 is connected to the screw auger 1 through a turn correlating tool 13 and thrusted while scraping the leading hole 3 along its peripheral wall by cutting blades 6, 6. The screw auger 1 is removed from the foundation pipe 2 which reaches a fixed depth, and the lower of a receiving bed part 5 is buried with earth and sand. Further a space (d) between an electric pole 9, placed in the receiving bed part 5, and the periphery of the foundation pipe 2 is buried with earth and sand, while quick-drying mortar is buried in a ground surface side part 10.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for burying foundation pipes for utility poles across ground-to-water veins, and to the foundation structure thereof.

[Prior art] When burying a foundation pipe for a regular telephone pole, the foundation pipe 2 is buried using a screw auger l of a hole-drilling pole* (not shown).
Drill a preliminary hole 3 corresponding to the length of. (Fig. 9) Next, connect the tip end 4 of the screw auger l to the cradle 5 for a telephone pole set in advance in the foundation pipe 2, and while loading the purpose of digging a hole and erecting a pole, the screw auger l'8 : When it rotates, the foundation pipe 2 is also rotated by 1K at the same time, and the cutting blades 6, 6, etc. fixed to the tip edge of the foundation pipe 2 are screwed in while cutting down the peripheral wall of the previously drilled preceding hole 3.
As shown in the figure, the outer peripheral wall of the foundation pipe 2 is screwed in close contact with the soil.

At this time, as shown in Figure 11, the pieces 1 and 7 that have been scraped off by the four cutting blades 6, 6, etc. are deposited in the F direction of the holder fj5 at the bottom of the foundation pipe 1 that has been dug, and at the same time they are deposited under the holder 5. If an empty space 1j18 is created at 1j18, completely bury it with earth and sand and then install the utility pole 9 at tt 5 , t-! T21.

At this time, ) & M 1lfl between foundation pipe 2 and utility pole 9
d is completely filled with top sand and hardened, and the ground edge portion 10 is covered with quick-drying mortar 10' to prevent the packed sand from flowing out (Fig. 13).

[Problems to be Solved by the Invention] As described in the prior art, the installation of free-standing utility poles on ordinary land without underground water veins is as described above, but when digging with a screw auger, If the ice [11] that exists underground is unfortunately crossed, the inner wall of the preceding hole 3 will collapse together with the flowing wood, making it difficult to drain the pump, or if there is an abundance of lockstitching. In this case, the water outlet part 12 in the preceding hole 3 is largely gouged out (Fig. 15), and the adhesion between the foundation pipe 2 and the top, which will be constructed later, is obstructed, and the fixation of the foundation pipe 2 becomes unstable. As a result, the supporting capacity of the foundation pipe 2 had to be reduced (Fig. 16).As a result, the collapse of the earth and sand gradually became larger as time progressed, further increasing instability.

The present invention has been made in view of the above-mentioned problems of the conventional technology, and its purpose is to solve the problem of water veins crossing the foundation pipe 43 in the soil. The present invention also proposes a method and its basic structure that can sufficiently secure the foundation pipe 2 and erect a utility pole that can withstand long-term use.

[Means for Solving the Problems] In order to achieve the above object, in the present invention, ``When there is a water vein that crosses the foundation pipe that holds the utility pole, the excavation by the screw auger is limited to the upper part that does not reach the water vein. First, make the base pipe equipped with a cutting blade at the tip completely hollow, attach it to the screw auger via a one-turn interlocking tool, and then twist the base pipe across the water vein to the required depth. After inserting the rotation link, [
Remove A and use only the screw auger to remove 4j of the earth and sand in the foundation pipe and remove the screw auger at the desired depth. Next, place the suspension pedestal in the foundation pipe and open the cavity below it. After burying the pole, place it on the pedestal, fill it with earth and sand, and fill the ground edge with quick-drying mortar to make it free-standing.
We propose a structure that allows the 7 & foundation pipe to be fixed as quickly as possible even in areas where underground water veins exist, and maintains its durability as much as possible.

[Action J: Digging directly across the underground water vein with the cutting blade of the foundation pipe, and at the same time, water inflow and L
This method prevents the surrounding wall of the preceding hole from collapsing by using an excavation method that prevents landslides.The foundation pipe is first screwed in, and then the earth and sand inside the pipe is excavated using a screw auger. Therefore, traversing 1Kll underground can be carried out very smoothly.

[Example 1 Examples will be described with reference to the drawings.

It should be noted that in FIGS. 1 to RG8 according to the present invention, parts that are the same as those of the conventional product are given the same reference numerals.

First, as shown in the stone in Figure 1, a preliminary hole is drilled using a screw auger 1 in a portion that does not reach the underground water vein 11, and the screw auger 11 is then removed to make the foundation pipe 2 completely hollow. As shown in the second figure, the base pipe 2 is connected to the tip 'JA4 via a rotary linking tool 13 (shown in the eighth figure).

This rotary linking tool 13 fits inside the foundation pipe 2, and connects the protrusion 14.14 at the lower end to the notch fi of the foundation pipe 2.
15. 1 rotation interlocking tool 1 designed to fit into 15
A pipe 16 is inserted and fixed on one side of the screw auger 1, and a bolt 17 is inserted and fixed on one side of the screw auger 1, and as shown in M211A, this contacts a part of the tip 4 of the screw auger 1, and the two are connected. That's how it is. The base pipe 2, whose center is completely hollow in this way, is connected to the screw auger and pushed into the preceding hole 3, and the pipe 2
The cutting blades 6, 6...first enter the preceding hole 3 while cutting it along the peripheral wall, and when it reaches the hole bottom 3a, only the pipe 2 is forcibly screwed in. At this time, 6, 6... at the cutting blade, it immediately cuts off most of the peripheral wall of the foundation pipe 2 or the water vein 11, reliably blocks the inflow of wood and prevents it from entering the inside of the pipe, and the 15th UA
As shown in the figure, it is possible to EQI the falling of earth and sand.

In this way, the rotating interlocking tool 13 is removed from the foundation pipe 2 which has crossed the water 1111 as shown in the fourth figure and reached a certain depth, and the earth and sand inside the foundation pipe 2 is removed using only the screw auger 1 to reach the required depth. Stop the vehicle, remove the screw auger 1, and attach the tip hooks 20, 20 of the hunts 19 provided at both ends of the suspension cradle 18 shown in FIG. 7 to the foundation pipe 2.
The screws 21.2 are suspended in the notches 15, 15 of
Fix the base pipes 2 to 11: 4L 22.22 respectively, and after filling the lower part of the pedestal part 5 with enough earth and sand, put the utility pole 9 on top of it.
A criss-cross shaped cross-shaped rod 23 is provided at the center point to point out the center point.

Thus, the af? The gap d between the utility pole 9 and the same type of pipe is filled with earth and sand, and quick-drying mortar is buried in the ground edge portion lO near the ground surface to complete the hinge. (Figure 5) [Efficacy of invention! lJ 2 buried like this! Since the iS pipe directly crosses the water vein, it is possible to prevent landslides as much as possible, as shown in Figures 3 to 5, and the durability after the foundation pipe is buried is also extremely good. This method not only simplifies the work but also brings extremely excellent effects on the burial work and structure.

[Brief explanation of drawings]

Figures 1 and 5 show a specific example of the order of burying utility poles according to the present invention. Partially cut away side surface L12. 6th UA is a perspective view of the foundation pipe, 7th UA is a perspective view of the suspension pedestal, and 8th UA is a perspective view of the foundation pipe. The figure is a perspective view of the rotating interlocking tool, and Figures 9 to 13 are the conventional normal case 1! Partially cutaway side view showing the installation in sequence, Part 1
Figures 4 to 16 are partially cutaway side views showing stub-like remains when water veins are present in the ground F. 1 ~ Screw auger 3 ~ Leading hole 5 ~ Rest part 9 ~ Utility pole 13 ~ Rotating linkage 2 ~ Foundation pipe 4 ~ Tip story 6 ~ Cutting blade 11 ~ Water vein ■ 8 ~ Hanging cradle Heisei! July 11, 2017Figure 9Figure 0Figure 1Figure 2Figure 3Figure 4Figure 5Figure 5

Claims (4)

[Claims] (1) If there is a water vein that crosses the foundation pipe that holds the utility pole, the screw auger should keep the excavation in the upper part where it does not reach the water vein, and rotate the foundation pipe, which is equipped with a cutting blade at the tip, completely hollow. It is attached to the screw auger via a connecting tool, and then the foundation pipe is directly screwed across the water vein to the required depth. After that, the rotary connecting tool is removed and the screw auger is inserted into the foundation pipe using only the screw auger. After removing the earth and sand and removing the screw auger at the desired depth, placing a suspension cradle in the foundation pipe and filling the cavity below, place the utility pole on the cradle and fill the gap with earth and sand. The construction direction of the free-standing utility pole, which is filled with quick-drying mortar at the ground edge. (2) The rotary linking tool is fitted inside the foundation pipe and is detachable so as to lock the protrusion that fits into a pair of locking portions drilled in the end opening of the foundation pipe and the harpoon portion of the earth auger. The method for erecting a self-supporting utility pole according to claim 1, which comprises bolts and nuts. (3) Consisting of a foundation pipe of a required length that crosses the groundwater vein, a hanging pedestal for a utility pole suspended within the foundation pipe, and a rotary linking tool that connects the foundation pipe to the screw auger, the foundation pipe directly connects the water vein to the foundation pipe. After crossing the pipe, remove the soil inside the pipe with a screw auger, suspend the suspension pedestal, place the utility pole on this, and fill in the gap between the base pipe and the foundation of the free-standing utility pole. structure. (4) The suspension pedestal has a pair of parallel suspension plates (bands) extending from both ends of the pedestal, and the terminals of the suspension plates (bands) are fixed to the latching portion of the foundation pipe with a suspension screw. ,
The foundation structure for erecting a self-supporting utility pole according to claim 3, wherein said horizontal rods are provided with regulating rods extending in a crisscross pattern for regulating their positions.