JP2009197533A - Method of setting under-bracing and post - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of setting an under-bracing and a post for setting a post, such as utility pole, to allow it to maintain its vertical position without tilting. <P>SOLUTION: According to the under-bracing, a pile-shaped portion 12 driven into a wall surface 21 of a drilled pit 20 is projected from a base 11 fixed to the lower part of a post (utility pole) 1. The pile-shaped portion 12 is composed of one bar or a plurality of bars arranged vertically. The method of setting the post includes a step of drilling the pit 20 in a place where the utility pole 1 is set, a step of driving the pile-shaped portion 12 of the under-bracing into the wall surface 21 of the pit 20, a step of erecting the pole 1 in the pit 20, a step of fixing the base 11 of the under-bracing to the lower part of the post 1, and a step of backfilling the pit 20. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a root skein (branch) in which a pole such as a power pole or a pole can maintain a vertical posture, and a method for installing a pole using the root skein.

  Pole and other support pillars (hereinafter, mainly referred to as “electric poles”) that support electric poles and traffic lights for installing electric wires, etc. are installed with their lower ends embedded at a predetermined depth from the ground. In some cases, a branch line is stretched so that the vertical posture can be maintained against the tension. However, in the case of a utility pole installed in an urban area, a branch line may not be installed. In such a case, a hole is excavated and the concrete is solidified around the utility pole over the top and bottom of the ground (called “rooting”).

  When the utility pole is erected on the soft ground, a pothole larger than usual is excavated and the concrete is hardened in a wide range. However, when concrete is hardened over a wide range of farmland, the cultivated land area becomes small, and the landowner's consent may not be obtained. Such a case can be dealt with by lengthening the portion in which the utility pole is embedded. However, for that purpose, it is necessary to use an electric pole longer than usual, which not only increases the cost but also makes the work cumbersome.

  Therefore, various types of skeins have been provided so that the utility pole can maintain a vertical posture even when excavating a normal-sized pit while being soft ground. The root skein is applied to the lower end of a utility pole buried in the ground, and is formed in a rod shape or a standing plate shape. Such a skein is fixed only to one side of the power pole by a U-shaped fastener that externally fits the power pole, or is fixed so as to sandwich the power pole in pairs. In any case, the conventional skein is generally made of concrete because it must be heavy so that the utility pole does not tilt. However, the heavy skein is heavy on the operator and cannot be efficiently fixed to the utility pole.

  For this reason, even if weight reduction is achieved, Patent Document 1 discloses a rooting that prevents the utility pole from tilting. As shown in FIG. 6, the root shank includes a mounting wall 101 that contacts the side surface of the utility pole 1, a contact wall 102 that protrudes outward from the lower end of the mounting wall 101, and the mounting wall 101 and the contact wall 102. And a beam 103 erected across. This skein is integrally formed of waste plastic, synthetic resin, concrete, aluminum alloy, or the like.

  In order to install the utility pole 1 using such a root shank, first, a round hole having a depth of about 1/6 of the entire length of the electrical pole 1 is excavated, and a stepped hole for further rooting is provided. Next, a skein is fixed at the lower part of the utility pole 1 with a fastener (U bolt) 110, and the utility pole 1 is lowered into a state of standing in the round hole. Finally, when the bottom of the skein coincides with the stepped hole, the round hole is backfilled with sand.

JP 2005-299227 A

  When the electric wire is installed on the electric pole only in one direction or at an angle, when a transformer is installed on the electric pole, or when the arm is protruding only on one side and the electric cable is installed on the electric pole, the unbalanced load on the electric pole Is added. However, since the root shank disclosed in Patent Document 1 and other conventional root shanks must be provided with stepped holes, the periphery of the utility pole is greatly excavated, and the ground is softened by this excavation. . Therefore, even if a utility pole with a root shank fixed is installed on such a soft ground, the utility pole may be tilted due to an unbalanced load.

  Then, this invention makes it a subject to provide the installation method of the root and the support | pillar for installing so that support | pillars, such as an electric pole, may maintain a vertical attitude | position, without tilting.

  The skein according to the present invention is a skein for making a pillar whose bottom end is buried in the ground to be in a vertical posture, and a pile-like part driven into the wall surface of the provided hole is fixed to the bottom end of the pillar. It is characterized by protruding at the base.

  According to this skein, the upright column can be maintained in a vertical posture by driving the pile-shaped portion into the wall surface of the excavated hole and fixing the base to the column. That is, in order to install a support column using this root skein, a drill hole is excavated in the minimum necessary range in order to make the support stand upright from the pothole, and a pile-shaped portion is driven into the wall surface of the pothole. Therefore, the ground on which the rooted pile-shaped portion is driven is not softened by backfilling, and the pile-shaped portion is firmly supported by the soil that is not weakened. For this reason, even if an unbalanced load is applied to tilt the column, a reaction from the soil is applied to the pile-like portion, and the column can maintain a vertical posture.

  Moreover, in the skein according to the present invention, it is preferable that the pile-shaped portion is one or a plurality of rod-shaped bodies arranged in the vertical direction. According to this root skein, the pile-shaped portion is configured by the rod-shaped body, so that the pile-shaped portion can be easily driven into the wall surface of the pothole. Then, the pile-shaped portion is constituted by a plurality of rod-shaped bodies arranged in the vertical direction, so that when an unbalanced load that tilts the column is applied, the plurality of pile-shaped portions push the soil against the soil. Since the pressure is dispersed, it becomes difficult for the pile-shaped portion to bite into the upper or lower soil, and the pile-shaped portion can maintain an intended posture in the soil.

  Further, in the skein according to the present invention, the pile-like portion may be a single plate or a plurality of plate-like bodies arranged in the vertical direction. According to this skein, the pile-shaped part is formed into a plate-like body, so that when an unbalanced load is applied to tilt the column, the pile-shaped part presses the soil with the surface, and the upper or lower Since it does not bite into the soil on the side, the support column can be maintained in a vertical posture. Then, when the pile-like portion is configured by a plate-like body arranged in a vertical direction, a plurality of pile-like portions press the soil when an unbalanced load that tilts the column is applied. Since the pressing force is distributed, the root can maintain the desired posture in the soil.

  Further, in the method for installing a support according to the present invention using any one of the above-mentioned roots, a step of providing a pothole at a place where the support is installed, and a step of driving the pile-shaped portion of the root into the wall surface of the pothole The method includes a step of erecting the column in the pothole, a step of fixing the root portion of the root and the lower end of the column, and a step of refilling the pothole.

  According to the method of installing the support column, the pothole is provided in a size that allows the rooted pile-shaped portion to be driven and the support column to stand upright, and the ground is softened to the minimum necessary. Moreover, since the ground on which the pile-shaped part is driven is not backfilled and softened, the rooted pile-shaped part is firmly supported by the soil, and the root skein maintains the desired posture, Can not be tilted. In addition, after making the support | pillar stand upright substantially in the center of a pothole, it may move toward the base part of a root skein, and may fix the base part of a root skein and the lower end part of a support | pillar.

  Moreover, in the installation method of the support | pillar which concerns on the said this invention, the said root skein may use two or more. According to this method of installing the support pillars, by using a plurality of skein, when an unbalanced load that tilts the support pillars is applied, the pressing force that presses the soil is dispersed by the plurality of pile-shaped parts. Each pile-like portion can be prevented from biting into the upper or lower soil. The plurality of root shanks may be disposed in the vertical direction, that is, in the longitudinal direction of the support column, or in the radial direction, that is, in the radial direction of the support column.

  According to the setting method of the root shank and the support according to the present invention, the pile-shaped portion protruding from the base fixed to the support is driven into the wall surface of the excavated pothole. Since the soil in which this pile-shaped portion is driven is not backfilled and is not softened, the pile-shaped portion is firmly supported by the soil, and the column can maintain a vertical posture even when an uneven load is applied. .

  A method for installing the shed and the support according to the present invention will be described with reference to FIGS. The skein is characterized in that a pile-like portion 12 protrudes from a base portion 11 fixed to the lower end portion of a utility pole, pole or other support (hereinafter, mainly referred to as “electric pole”), and has various forms. Can be taken.

  That is, as shown by the solid line in FIG. 1, the root shank has a plate-like shape with the base 11 on the side surface of the utility pole 1 and along the length direction, that is, the vertical direction, and the pile-like portion 12 has a pointed shape. It is a rod-shaped body, and is provided at the lower end of the base 11. The base 11 may be a rod shape having the same width as the width of the pile-shaped portion 12 in addition to the saddle shape as illustrated. Moreover, you may project the pile-shaped part 12 in the upper end part of the base 11, as shown with a virtual line. That is, the pile-shaped part 12 may protrude from only the lower end part of the base part 11, only the upper end part, or both end parts. Furthermore, although not shown, the pile-shaped part 12 may be provided in a protruding manner only at a total of three or more of the both ends and the intermediate part of the base part 11 or only at the intermediate part.

  Further, as shown by the solid line in FIG. 2, the root shank is formed into a hook shape along the length direction of the base 11 on the side surface of the utility pole 1, and the pile-shaped portion 12 is a pointed plate-like body, It is good also as what protruded in the lower end part of the base 11. FIG. Moreover, the pile-shaped part 12 is not only the lower end part of the base part 11, but only the upper end part shown by an imaginary line, or both end parts. Or you may project only in the intermediate part.

  Moreover, as shown by the solid line in FIG. 3, the root shank has a base 11 on the side surface of the utility pole 1 and a hook shape along the length direction, and the pile-shaped portion 12 is a fan-shaped plate-like body, It is good also as what protruded in the lower end part of the base 11. FIG. The tip of the pile-shaped part 12 is sharpened like a cutting edge. Moreover, the pile-shaped part 12 is not only the lower end part of the base part 11, but only the upper end part shown by an imaginary line, or both end parts. Or you may project only in the intermediate part.

  Further, although not shown in the figure, the skein may be provided so that each pile-like portion 12 shown in FIGS. 1 to 3 protrudes from the lower end portion, the upper end portion, and the intermediate portion.

  Here, a method of installing the utility pole 1 using such a skein will be described with reference to FIG. 4 and FIG. 5 shows the skein of the pile-shaped portion 12 projecting from the lower end of the base 11, but the same is true even if projecting from the upper end and / or the intermediate portion. It is.

  To install the utility pole 1, first, as shown in FIG. 4 (a), the ground on which the utility pole 1 is installed is excavated by a heavy machine such as hand digging and / or an auger, and a pit hole 20 is provided. Lower the root skein. Then, as shown by an imaginary line in FIG. 4A, the rooted pile-like portion 12 is driven into the wall surface 21 of the pit hole 20. Since the pile-shaped part 12 is formed in a pointed shape or a sharp point, it can be easily driven into the side surface 21 of the hole 20. The wall surface 21 into which the pile-shaped portion 12 is driven is preferably erected in the vertical direction (including a direction slightly inclined from the vertical as shown) because the utility pole 1 follows as described later. In addition, since the pile-shaped part 12 is driven into the wall surface 21 of the pit hole 20, the root shank is preferably made of stainless steel, but may be made of resin or concrete.

  Next, the utility pole 1 is made to stand upright in the hole 20. The utility pole 1 is once lowered to substantially the center of the pothole 20 so as not to collide with the root shank, and then moved in the direction of the root shank and is erected. However, the utility pole 1 may be hung so that the side faces the rooted base 11. Alternatively, the pole 1 may be driven into the wall surface 21 of the pothole 20 after the electric pole 1 stands upright in the pothole 20. In any case, the utility pole 1 is brought into contact with the root base 11 as shown by the phantom lines in FIG. 4B and FIGS. The base 11 is fixed.

  Then, as shown in FIG.4 (c), if soil is refilled in the pothole 20, the installation work of the utility pole 1 will be complete | finished. The ground where the utility pole 1 is installed is not softened because the side on which the rooted pile-like portion 12 is driven is not backfilled. In addition, the softened area of the pothole 20 that has been backfilled with soil is set to the minimum necessary to drive the root skein and suspend the utility pole 1. Accordingly, the root skein is in a state in which the pile-like portion 12 is firmly supported by the soil, and the base 11 is fixed to the utility pole 1, so that the utility pole 1 can maintain a vertical posture.

  For example, as shown in FIG. 5 (a), the electric wire 2 is installed only in the direction opposite to the stake-shaped pile-shaped portion 12, or a transformer or the like is installed on the upper part of the utility pole 1, so that the utility pole is installed in that direction. When an unbalanced load (counterclockwise moment in the drawing) T that tilts 1 is applied, a force in the lifting direction (counterclockwise moment in the drawing) F is applied to the stake-like pile-shaped portion 12. The root stake-like portion 12 tends to push up the soil on the upper side. However, since this soil is not softened, the root stake 12 does not penetrate into the upper soil, and the reaction R from this soil is added to the root stake 12 so that the root skein 12 Maintains the desired posture. Therefore, the utility pole 1 maintains a vertical posture.

  On the contrary, as shown in FIG. 5 (b), the electric wire 2 is installed only in the same direction as the stake-shaped pile-shaped portion 12, or a transformer or the like is installed on the upper part of the electric pole 1, so that When an unbalanced load (a moment in the clockwise direction in the drawing) T that tilts the utility pole 1 is applied, a force (a moment in the clockwise direction in the drawing) F that is pushed down is applied to the stake-like pile-shaped portion 12. The rooted stake-like portion 12 tends to push down the soil below it. However, since this soil is not softened, the root stake-like portion 12 does not penetrate into the lower soil, and the reaction R from this soil is added to the root-stake-like pile portion 12, The root skein maintains the desired posture. Therefore, the utility pole 1 maintains a vertical posture.

  Thus, the skein pile-like portion 12 may be directed in any direction in which an offset load is applied. Moreover, when an uneven load is applied from a plurality of directions, a plurality of roots are fixed to the utility pole 1 and driven into the wall surface 21 of the hole 20 so that each pile-shaped portion 12 is in the respective direction or the opposite direction. Thus, the utility pole 1 can be prevented from tilting. In this case, the rooted base portion 11 is juxtaposed in the circumferential direction of the utility pole 1.

  Moreover, the effect which prevents the utility pole 1 from tilting can be heightened by fixing a plurality of roots to the utility pole in the vertical direction.

  In addition, this invention can be variously changed without being limited to the said embodiment. For example, the pile-shaped part 12 is not limited to the illustrated shape. That is, the skein-like pile-shaped portion 12 shown in FIGS. 1 and 2 may be a triangular pyramid shape or a flat plate shape over the entire length. Further, the rooted stake-shaped portion 12 shown in FIG. 3 may have a serrated tip. Furthermore, in the installation method of the utility pole 1, the bottom part or the whole of the hole 20 may be hardened with concrete. Furthermore, the skein of the present invention can be used even when an unbalanced load is not applied to the utility pole 1.

It is a perspective view which shows one Embodiment of the rooting which concerns on this invention. It is a perspective view which shows embodiment different from FIG. 1 of the root shank which concerns on this invention. It is a perspective view which shows embodiment different from FIG.1 and FIG.2 of the rooting which concerns on this invention. It is one Embodiment of the installation method of the support | pillar which concerns on this invention, Comprising: (a) is an initial stage, (b) is an intermediate | middle stage, (c) is sectional drawing which respectively shows the completed stage. It is the state which installed the support | pillar using the root shank which concerns on this invention, Comprising: (a) (b) is sectional drawing which shows the action direction of force at the time of making the direction where an eccentric load is applied different. It is a perspective view which shows an example of the conventional rooting.

Explanation of symbols

1 …… Pole (post)
DESCRIPTION OF SYMBOLS 11 ... Base 12 ... Pile-shaped part 20 ... Cave hole 21 ... Wall surface

Claims (5)

It is a root skein to make the pillar whose bottom end is buried underground, in a vertical posture,
A skein characterized in that a pile-like portion that is driven into the wall surface of a provided hole projects from a base portion fixed to the lower end portion of the support column.   The skein according to claim 1, wherein the pile-like portion is one or a plurality of rod-like bodies arranged in a vertical direction.   The skein according to claim 1, wherein the pile-shaped portion is one plate or a plurality of plate-like bodies arranged in a vertical direction. It is the installation method of the support | pillar which uses the root shank of any one of Claim 1 thru | or 3, Comprising:
Fixing the process of providing a pothole at the place where the column is installed, the process of driving the stake pile-shaped part into the wall of the pothole, the process of standing the column upright in the pothole, and the base of the root and the lower end of the column And a step of refilling the pothole.   The pillar installation method according to claim 4, wherein a plurality of the root skeins are used.

Images