JPH0560011B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention provides a method for supporting the ground surface when connecting the upper part of the pole and the diagonal ground surface with a branch line in order to prevent the collapse of a pole erected on the ground such as a utility pole. This relates to stay anchors that are installed underground to create points.

[Conventional technology]

The technology related to the present invention is only a stay anchor using the earth auger excavation hole of Japanese Patent Publication No. 61-22092.

The technology (hereinafter referred to as prior art) will be explained below with reference to the accompanying drawings 17 to 27.

With the side view in FIG. 17 and the plan view in FIG. 18, the drawing on the left shows a fixed pipe 23 made of a square pipe at the outer end of the resistance plate 1, which has an arc-shaped notch on one side of a perfect circular flat plate. A fan-shaped reinforcing plate 22 is fixed on the resistance plate 21, and a fixed pipe 23 is passed through it in the same way as the resistance plate 21, and it is fixed and integrated with the fixed pipe 23. .

The right side has a resistance plate 21, a reinforcing plate 22, and a fixed pipe 23 that have the same shape as the left side, but with the upper and lower sides reversed. This is due to the reasons described below.

In FIG. 19, a core rod 25 is penetrated and fixed to both opposite ends of a regular disk-shaped substrate 24, and a washer 26 is fixed to each lower end.

FIG. 20 is a plan view of the fixed ring 27 made of a steel plate and shaped into an ellipse as shown in the figure, and FIG. 21 is a side view thereof.

Each member explained above is shown in the side view of Fig. 22 and the
As shown in the plan view of FIG. 3, first, the fixed pipes 23 integrated with the resistance plates 21 of FIGS. 17 and 18 are attached to each core rod in the state of FIG. The washer 26 is fixed to and integrated with the core rod 25 which is passed through as being housed within the circumference of the fixed pipe 23 and can protrude equally from the upper side of the fixed pipe 23.

In the above, each resistance plate 21 has its flat plate surface brought into close contact with each other, and each fixed pipe 23 is maintained in a juxtaposed state by the fixed ring 27, protrudes from the fixed ring 27 by the same amount as planned, and furthermore, The rods 25 also protrude from the fixed pipe 23 by the same amount.

Incidentally, each core rod 25 is provided with a female thread on its upper side.

As shown in the side view of FIG. 24 and the plan view of FIG. 25, each of the resistance plates 21 as described above is rotated by 180 degrees when each fixed pipe 23 is rotated by 180 degrees. Board 2 each
This means that the maximum resistance area will be expanded to both sides of 4.

The procedure for constructing such a structure in the prior art is to excavate a hole M with an earth auger as shown in FIG.
Each core rod 25 has an upper pull rod 28 that can be machined with male threads at both the upper and lower ends.
are screwed down and placed on the bottom of the hole M, and then the rotation angle pipes 29 are sequentially fitted onto the respective fixed pipes 23 and rotated 180 degrees, so that each resistance plate 21 is attached to both sides of the hole M. They burrow into the undamaged soil and spread.

Thus, as shown in FIG.
An upper trigger fitting 30 having a connecting ring 31 made up of
A nut 32 is screwed onto each of the upper pulling rods 28 that pass through the hole and protrude from the upper pulling fitting 30, and the excavated hole M is filled with backfilling soil N and thoroughly pounded to ensure that all Construction is now complete.

[Problem that the invention seeks to solve]

The above-mentioned prior art excavation hole M is 45 cm in diameter and approximately 2 m deep and is buried using an ordinary earth auger for utility pole construction.
Although it is fully effective for large capacity branch lines of 15ton to 20ton, branch line anchors are suitable for large capacity branch lines of 5ton to 20ton.
General-purpose anchors for 10 tons are the most widely used.

When it comes to general-purpose anchors, it is naturally required that the price be low, so the prior art is over-designed and too expensive.Naturally, it is necessary to make it even lighter and simpler, at the same time cheaper, and to further improve the construction procedure. There is a need for simplification.

[Means to solve the problem]

In the case of general-purpose anchors as explained above,
While the prior art uses two resistor plates 21 and expands them in both directions, one resistor plate 211
The objective can be fully achieved in this way.

Furthermore, if there is only one resistor plate 21 on one side, it becomes possible to use only one lifting rod 28, and at the same time, the fixing ring 27 is also unnecessary, and furthermore, the board 24 is also unnecessary.

With the above, if only one resistor plate 21 is used, and if you try to rotate it 180 degrees and expand it into undamaged soil, you will need a structure that can receive the reaction force generated as it expands. In addition, if only one resistance plate 21 is used, the load will be uneven, so the resistance plate 21 that has expanded into the undamaged soil will escape in the direction of the weak earth pressure that backfilled the excavated hole M, and Only the weakening soil pressure becomes the object of earth pressure resistance, and no matter how general-purpose anchors and raindrops are used, they cannot withstand it.

Therefore, as a means to deal with this, it is necessary to provide a side wall plate that exerts a necessary amount of resistance on the side wall of the excavated hole M on the opposite side to the resistance plate 21 that is intended to be expanded.

[Function and Examples]

The present invention will be described in detail below.

In the side view of FIG. 1 and the plan view of FIG. At one end, set the height to be planned and the circumference to match the circumference of the earth auger excavation hole, and for reasons that will be described later, set the width to slightly less than half of the circumference and the planar area. A side wall plate 2 is fixed, and both sides of the side wall plate 2 and the center part of the base body 1 are integrally fixed with a connecting plate 3 having the same height as that of the base body 1. A coupling hole 4 is bored near the opposing outer ends of the two.

Next, referring to the side view of FIG. 3 and the plan view of FIG. A fan-shaped reinforcing plate 6 as shown in the figure is fixed on the flat surface of the resistance plate 5, and a fixing pipe 7 made of a square pipe is inserted through the reinforcing plate 6 on the outside of the center of the circumference. When placed on the resistance plate 5, the resistance plate 5 and the fixed pipe 7 are sufficiently fixed, and the contact portion between the fixed pipe 7 and the reinforcing plate 6 is also sufficiently fixed.

Such a fixed pipe 7 is made to protrude from the reinforcing plate 6 by the planned required height, and a core rod 8 whose upper end is male threaded and a washer 9 is fixed to the lower side is inserted thereinto. penetrates through the resistance plate 5 and protrudes by a certain amount.

The respective members shown in FIGS. 1 and 2 and FIGS. 3 and 4 above are shown in the side view of FIG. 5 and the side view of FIG. 6.
As shown in the plan view, a core rod 8 protruding from the resistance plate 5 is inserted into the coupling hole 4 of the base 1, and a washer 9 is fixed to the resistance plate 5, reinforcing plate 6, fixing pipe 7.
It is connected to the base 1 to which the side wall plate 2 is fixed by means of a core rod 8 integrated with the main body A.

The main body A as described above has a perfect circular shape as shown in FIG. 6 in which the extension line of the perfect circular circumferential surface of the resistance plate 5 and the circumferential surface of the side wall plate 2 coincide with each other. This means that it can be passed through.

As shown in the side view of FIG. 7 and the plan view of FIG. 8, the main body A has a fixed pipe 7.
When the resistor plate 5 is rotated 180 degrees, the integrated resistor plate 5 is expanded further than the outer end of the base body 1, as shown in the figure.

Next, FIG. 9 shows an upper pull fitting 14 having a socket 11 at the lower part and a coupling ring 13 at the upper part, and in FIG. 10, 10 is an upper pull rod, 11 is a socket, and 12 is a This is an enlarged diameter screw that is machined by enlarging the diameter of the upper puller rod 10 so that the diameter of the thread bottom is the same as the diameter of the upper puller rod.

The construction procedure of the present invention having the structure of each member as described above is as shown in FIG. 11. The main body A is placed on the bottom of a hole M excavated by an earth auger, and the resistance plate 5 is closed as shown in FIGS. 5 and 6. After setting the condition, the upper puller rod 10 is screwed onto the core rod 8 and the amount is measured on the bottom of the hole.
The plan view of this state is as shown in FIG. 12, and the perfect circle formed by the resistance plate 5 and the side wall plate 2 is in close contact with the side wall of the excavated hole M at the bottom of the excavated hole M.

Here, as shown in FIG. 13, the rotating angle pipe 15 is fitted to the fixed pipe 7 made of square pipes, and when the rotating angle pipe 15 is rotated 180 degrees, the resistance plate 5
The soil is spread into the undamaged soil from the side wall of the auger hole, and the upper puller fitting 14 is connected to the upper puller rod 10 as shown in FIG. Construction will be completed.

〔Effect of the invention〕

Compared to the prior art in which two resistive plates are spread out on opposite sides of the earth auger excavation hole, the present invention has one resistance plate.
It is generally used as a stay anchor because it allows only the resistance plate 5 of 5 to expand to one side.
It satisfies the purpose of use as a 5ton to 10ton anchor, the material used is almost halved and the price is low, construction is extremely simple and convenient, and it is also an anchor with a smaller capacity and tensile strength. When doing so, it is possible to reduce the area of the resistance plate 5 and the side wall plate 2.

However, when one resistor plate 5 is expanded, a reaction force is generated against the side wall plate 2 on the opposite side when the resistor plate is expanded.For this reason, if there is no side wall plate 2, Since only the slight cutting resistance due to the cross section of the channel steel of the base body 1 resists the reaction force, the base body 1 starts to move into the side wall of the excavation hole without being able to resist the reaction force, and the resistance plate 5 This makes it impossible to expand.

Also, if there is no side wall plate 2, the construction completion position indicated by the solid line as shown in Fig. 15,
The resistance plate 5, whose one end of the circular flat plate is upwardly loaded by the upward pulling rod 10, begins to escape in the direction of the uneven load as indicated by the dotted line due to the extremely uneven load. No matter how well the earth auger excavated hole M is filled with backfill soil N and hardened, it is soft and incomparable with the undamaged soil on the side wall, which has been subjected to natural expansion pressure over many years.

Therefore, the escape movement of the resistor plate 5 is further facilitated, and due to the escape movement, the integrated base body 1 can also easily dig into the side wall soil and move due to the slight cross-sectional resistance due to the channel steel. It becomes impossible to prevent the escape action of the resistance plate 5, and in the end, the earth auger with the least earth pressure resistance is the one in the excavation hole M.
As a result, sufficient tensile strength cannot be exerted due to upward migration in the backfill soil N.

However, in the present invention, as clearly shown in FIG. 16, a side wall plate 2 having a calculated resistance area is fixed to the end face of the base body 1 facing the resistance plate 5 so as to face the side wall.

For this reason, the resistance plate 5, which attempts to move due to the unbalanced load, is completely prevented from moving, and also sufficiently counters the reaction force when the resistance plate 5 is expanded, thereby achieving the purpose of expansion. The resistance plate 5, which can be expanded to one side, completely eliminates and balances the uneven load with respect to the upward load by the side wall plate 2, and exhibits the planned tensile strength.

[Brief explanation of drawings]

FIG. 1 is a side view of the base 1, and FIG. 2 is a plan view thereof. FIG. 3 is a side view of the resistance plate 5, and FIG. 4 is a plan view thereof. FIG. 5 is a side view of the main body A, and FIG. 6 is a plan view thereof. FIG. 7 is a side view showing the state in which the resistance plate 5 is rotated 180 degrees and expanded on the main body A, and FIG. 8 is a plan view thereof as well. FIG. 9 is an explanatory diagram of the upper pull fitting 14,
FIG. 10 is an explanatory diagram of the upper pull rod 10. FIGS. 11 to 14 are explanatory diagrams of the construction procedure, and FIGS. 15 and 16 are explanatory diagrams of the effects. 17 to 27 are explanatory diagrams related to the prior art. Invention of the present application, 1... base body, 2... side wall plate, 3...
...Connecting plate, 4... Connection hole, 5... Resistance plate, 6...
Reinforcement plate, 7... Fixed pipe, 8... Core rod, 9...
Washer, 10...Upper pull rod, 11...Socket, 12...Enlarged diameter screw, 13...Connection ring, 14
... Upper pull fitting, 15 ... Rotating angle pipe, A ... Main body, M ... Excavation hole, N ... Backfilling soil, conventional technology, 21 ... Resistance plate, 22 ... Reinforcement plate, 23 ... …
Fixed pipe, 24... Board, 25... Core rod, 26
... Washer, 27 ... Fixed ring, 28 ... Top pull rod, 29 ... Rotating angle pipe, 30 ... Top pull fitting,
31... Bonding ring, 32... Nut, M... Excavation hole, N... Backfilling soil.

Claims (1)

[Scope of Claims] 1 One side of the gas 1 has a circumferential surface corresponding to the circumference of the earth auger excavation hole M, and a planned smaller amount than the semicircle is cut out, and the total arc plane area is Resistance plate 5
A side wall plate 2 is fixed together with the connecting plate 3 as a resistance surface that can counter the reaction force when rotating and can prevent the shifting of the resistance plate 5 subjected to an uneven load. A resistance plate 5 made of a disk corresponding to the circumferential surface of the excavated hole M and having one side cut into an arcuate surface of the planned amount is fixed and integrated with an auxiliary plate 6 and a fixed pipe 7, and a core rod 8 is attached. A single-open stay anchor characterized in that it is rotatably connected to a base body 1, and an upper pull rod 10 is connected to a core rod 8.