U.S. patent application number 15/998896 was filed with the patent office on 2021-07-08 for apparatus and method for fastening a composite pole to the ground.
This patent application is currently assigned to Comrod AS. The applicant listed for this patent is Comrod AS. Invention is credited to Ole Gunnar Fjelde, Torbjorn Fjelde, Sigurd Habakk.
Application Number | 20210207335 15/998896 |
Document ID | / |
Family ID | 1000005488946 |
Filed Date | 2021-07-08 |
United States Patent
Application |
20210207335 |
Kind Code |
A1 |
Fjelde; Ole Gunnar ; et
al. |
July 8, 2021 |
Apparatus and Method for Fastening a Composite Pole to the
Ground
Abstract
A fastening element is for fastening a hollow composite pole to
the ground at a location where a slit-formed opening is present in
the ground. The fastening element has a lower end portion that is
configured for being positioned in the slit-formed opening, wherein
a conical portion of the composite pole is abutting a conical upper
portion of the fastening element. A method is for fastening a
hollow composite pole to the ground.
Inventors: |
Fjelde; Ole Gunnar; (Tau,
NO) ; Fjelde; Torbjorn; (Jorpeland, NO) ;
Habakk; Sigurd; (Tau, NO) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
Comrod AS |
Tau |
|
NO |
|
|
Assignee: |
Comrod AS
Tau
NO
|
Family ID: |
1000005488946 |
Appl. No.: |
15/998896 |
Filed: |
February 16, 2017 |
PCT Filed: |
February 16, 2017 |
PCT NO: |
PCT/NO2017/050040 |
371 Date: |
August 16, 2018 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
E04H 12/2215 20130101;
E02D 27/42 20130101; E04H 12/02 20130101 |
International
Class: |
E02D 27/42 20060101
E02D027/42; E04H 12/22 20060101 E04H012/22 |
Foreign Application Data
Date |
Code |
Application Number |
Feb 16, 2016 |
NO |
20160270 |
Claims
1. A fastening element for fastening a hollow composite pole for
overhead power lines to the ground at a location where a
slit-formed opening is present in the ground, the fastening element
comprising a lower end portion that is configured for being
positioned in the slit-formed opening, wherein the fastening
element has a conical upper portion, wherein, in operational use of
the fastening element, a conical portion of the composite pole is
configured for moving over the conical upper portion of the
fastening element until abutment with the fastening element is
established.
2. The fastening element according to claim 1, wherein the lower
end portion of the fastening element is circular for allowing the
fastening element to be placed in the slit formed opening being
circular.
3. The fastening element according to claim 1, wherein the
fastening element at its lower end portion is equipped with drill
elements.
4. The fastening element according to claim 3, wherein the drill
elements comprise metal.
5. The fastening element according to claim 3, wherein the drill
elements comprise ceramic material.
6. A method for fastening a hollow composite pole for overhead
power lines to the ground, the method comprising: making a
slit-formed opening in the ground; inserting the fastening element
into the slit-formed opening, and moving the composite pole that is
conical, over the fastening element until abutment is
established.
7. The method according to claim 6, wherein the method comprises
fixing the fastening element to the ground.
8. The method according to claim 6, wherein the method comprises
making the slit-formed opening by drilling into the ground.
9. The method according to claim 6, wherein the method comprises
making the slit-formed opening by hammering the fastening element
into the ground.
10. The method according to claim 6, wherein the method comprises
providing the fastening element and drilling the fastening element
into the ground.
11. The fastening element according to claim 2, wherein the
fastening element at its lower end portion is equipped with drill
elements.
12. The method according to claim 7, wherein the method comprises
making the slit-formed opening by drilling into the ground.
13. The method according to claim 7, wherein the method comprises
making the slit-formed opening by hammering the fastening element
into the ground.
14. The method according to claim 7, wherein the method comprises
providing the fastening element and drilling the fastening element
into the ground.
15. The method according to claim 8, wherein the method comprises
providing the fastening element and drilling the fastening element
into the ground.
Description
FIELD OF THE INVENTION
[0001] This invention relates to an apparatus for fastening a
hollow composite pole to the ground where a slit formed opening is
present in the ground. The invention also relates to a method for
fastening a hollow composite pole to the ground.
BACKGROUND OF THE INVENTION
[0002] It is known to fasten composite poles in the ground by
excavating a recess, and thereafter positioning the composite pule
in the recess and till in around the pole. Regarding poles for
overhead power lines, such a method will often involve relatively
large environmental damage, particularly when a recess is made in
rock. When fastening poles by use of said method, frost damage may
occur due insufficient draining.
[0003] It is also known to mount a composite pole to a column
raised from the ground. The column may be made from concrete and
having reinforcement that extends into the ground. The composite
pole may be inserted over the column. If the column is made from
concrete, it is necessary to bring the concrete to the position of
the column often by use of a helicopter, or make concrete at the
position of the column. Both methods comprises extra costs and
work.
[0004] WO2004/101914 discloses a hollow pole that is drilled into a
slit the ground.
[0005] Documents EP1911912A2, WO2004/101914A1, GB2444411 and
GB2429229A show other solutions from the prior art.
SUMMARY OF THE INVENTION
[0006] The invention has for its object to remedy or to reduce at
least one of the drawbacks of the prior art, or at least provide a
useful alternative to prior art.
[0007] The object is achieved through features, which are specified
in the description below and in the claims that follow.
[0008] The invention is defined by the independent patent claims.
The dependent claims define advantageous embodiments of the
invention.
[0009] In a first aspect, the invention relates more particularly
to fastening element in accordance with claim 1.
[0010] The invention concerns having a slit-formed opening,
preferably circular, in the ground, where a fastening element is
positioned in the slit-formed opening. The fastening element has a
conical upper portion above the ground. A hollow composite pole,
has a complementary conical inner portion at its lower end, and is
positioned on and abutting the fastening element.
[0011] By hollow means that the composite pole must have an inner
opening, at least in the portion that is moved over the fastening
element.
[0012] The slit formed opening may be circular and formed by
drilling or hammering a body into the ground.
[0013] The fastening element may be equipped with drill elements at
its lower end portion to enable the fastening element to be used as
a drill.
[0014] The drill elements may comprise metal or ceramic material or
combinations thereof.
[0015] In a second aspect the invention relates more particularly
to a method for fastening a hollow composite pole for overhead
power lines to the ground in accordance with claim 6.
[0016] The method comprises fixing the fastening element to the
ground, for instance by adhesive or a concrete based material.
[0017] The method may comprise making the slit formed opening by
drilling into the ground.
[0018] The method may comprise making the slit formed opening by
hammering the fastening element into the ground.
[0019] The method comprises providing the lower end portion of the
fastening element with drill elements and drilling the fastening
element into the ground.
[0020] The fastening element may be made from composite material or
metal or combinations thereof.
[0021] If parts of the ground that is positioned on the inner side
of the slit should loosen or where it is advantageous to have it
removed partly or fully, the material on the inner side of the slit
may be at least partly removed.
[0022] When drilling in soil or march, it may be advantageous to
have frost in the ground to avoid movement in the ground during
drilling.
[0023] Tests show that the drill or the fastening element must be
aligned with the vertical axes prior to being moved into the
ground.
[0024] The apparatus and method according to invention solves the
problem of fastening a hollow composite pole to the ground in a
relatively simple and cost effective way.
BRIEF INTRODUCTION OF THE DRAWINGS
[0025] In the following is described examples of preferred
embodiments and methods illustrated in the accompanying drawings,
wherein:
[0026] FIG. 1 shows a vertical section of a drill and a power drill
during drilling of a slit formed opening in the ground according to
the invention;
[0027] FIG. 2 shows a vertical section of a composite pole that has
been moved into the slit formed opening that was drilled by use of
the drill in FIG. 1;
[0028] FIG. 3 shows an embodiment where a fastening element has
been moved into the slit formed opening that is drilled by the use
of the drill shown in FIG. 1, and where the fastening element is
fixed to the composite mast;
[0029] FIG. 4 shows another embodiment where the fastening element,
at its lower portion, is equipped with drill bodies:
[0030] FIG. 5 shows a section IV-IV in FIG. 4; and
[0031] FIG. 6 shows in a larger scale a segment V-V in FIG. 5 of
the lower portion pf the fastening element and a drill body.
DETAILED DESCRIPTION OF THE EMBODIMENTS
[0032] On the drawings, the reference numeral 1 denotes a drill
that by the help of a power drill 2 is under displacement into the
ground 4. The ground 4 may constitute for example rock, soil, or
march, alternatively combination thereof.
[0033] The power drill 2 is typically aligned and is fixed to the
ground 4 or another suitable, not shown device. There after the
power drill 2 that may be electrically or hydraulically driven,
displaces the drill 1 into the ground 4 while rotating the drill 1.
Thus, a slit formed opening 6 is formed in the ground 4. The drill
1 is then removed from the slit formed opening 6.
[0034] A composite pole 8 that has been moved into the slit formed
opening 6 is shown in FIG. 2. Additional fixing of the composite
pole 8 to the ground 4 may be achieved by inserting grouting,
fixing compound or other material (not shown) in between the
composite pole 8 and the ground 4.
[0035] In an embodiment of the invention, shown in FIG. 3, a sleeve
formed fastening element 10 is positioned in the slit formed
opening 6. Additional fixing of the fixing element 10 to the ground
4 may be carried out as described for the composite pole 8. A
composite pole 8 that is conical inside is placed about the
fastening element 10 that has a conical upper portion 18, and moved
against the fastening element until abutment is established.
[0036] In some cases, as when the ground 4 mainly constitutes
suitable soil, the fixing element 10 may be forced into the ground
4 by hammering.
[0037] In a further alternative embodiment as shown in FIG. 4, the
fastening element 10 is by its lower end portion 12 equipped with
several drill elements 14. The section IV-IV in FIG. 5 shows a
possible distribution of the drill elements 14 about the centre
axis 16 of the fastening element 10. The drill elements may be made
from material from the fastening element 10 or constitute other
materials that is fixed to the fastening element 10.
[0038] A typical drill element 14 is shown in FIG. 6 where the
drill element 14 that constitutes hard metal, is braced to the in
use lover end portion lower end portion 12 of the fixing element
10.
[0039] The fixing element 10 shown in FIG. 4 is shown in two parts
where in use an upper portion 18 that is fixed to the composite
pole 8 is fixed to the in use lower portion 22 of the fixing
element 10 by a flange connection 20. The lower portion 22 is here
drilled into the ground 4.
[0040] It should be noted that the above-mentioned embodiments
illustrate rather than limit the invention, and that those skilled
in the art will be able to design many alternative embodiments
without departing from the scope of the appended claims. In the
claims, any reference signs placed between parentheses shall not be
construed as limiting the claim. Use of the verb "comprise" and its
conjugations does not exclude the presence of elements or steps
other than those stated in a claim. The article "a" or "an"
preceding an element does not exclude the presence of a plurality
of such elements. The mere fact that certain measures are recited
in mutually different dependent claims does not indicate that a
combination of these measures cannot be used to advantage.
* * * * *