U.S. patent application number 12/812742 was filed with the patent office on 2010-12-09 for pile for foundation.
Invention is credited to Petr Horanek.
Application Number | 20100310321 12/812742 |
Document ID | / |
Family ID | 41278505 |
Filed Date | 2010-12-09 |
United States Patent
Application |
20100310321 |
Kind Code |
A1 |
Horanek; Petr |
December 9, 2010 |
Pile for Foundation
Abstract
The device includes the body (1), provided with a helix (3) on
the bottom end, and of an ending (4) on the top part of the body
(1). The diameter of the helix (3) is in the range of 1.0 to 100
times the diameter of the body (1) and/or of the least transversal
dimension of the body (1). The body (1) has a closed or open
profile on the cross section, with the body (1) having one profile
at least. The pitch of the helix (3) is in the range of 0.1% to 90%
with the pitch being linear or variable along the length of the
helix and the length of the blade of the helix (3) being 5.degree.
at least of the circumference of the body (1) and the drilling base
being provided with one helix (3) at least. On the bottom end, the
body is provided with a pricker (2), with the pricker (2) being
bevelled into one surface at least on the bottom end at the angel
in the range of 90.degree. to 0.1.degree. towards the vertical axis
of the drilling base and/or with the bottom end of the pricker (2)
having a semi-spherical shape.
Inventors: |
Horanek; Petr; (Plzen,
CZ) |
Correspondence
Address: |
Hovey Williams LLP
10801 Mastin Blvd., Suite 1000
Overland Park
KS
66210
US
|
Family ID: |
41278505 |
Appl. No.: |
12/812742 |
Filed: |
August 26, 2009 |
PCT Filed: |
August 26, 2009 |
PCT NO: |
PCT/CZ09/00106 |
371 Date: |
July 13, 2010 |
Current U.S.
Class: |
405/252.1 |
Current CPC
Class: |
E02D 5/801 20130101 |
Class at
Publication: |
405/252.1 |
International
Class: |
E02D 5/34 20060101
E02D005/34 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 28, 2008 |
CZ |
PUV 2008-20271 |
Aug 28, 2008 |
CZ |
PV 2008-522 |
Feb 16, 2009 |
CZ |
PUV 2008-20873 |
Claims
1. (canceled)
2. (canceled)
3. (canceled)
4. (canceled)
5. (canceled)
6. (canceled)
7. (canceled)
8. (canceled)
9. (canceled)
10. (canceled)
11. (canceled)
12. (canceled)
13. (canceled)
14. (canceled)
15. (canceled)
16. (canceled)
17. (canceled)
18. A pile for a foundation comprising: a body having a bottom end
and a top end, at least one helix provided on the bottom end of the
body, the top end including an ending; wherein the helix has an
blade having a diameter and the body has a diameter and/or least
transversal dimension, the diameter of the helix being between
about 1.0 to 100 times the diameter and/or least transversal
dimension of the body, and wherein the body has a cross-section and
a closed or open profile on the cross-section, the body having at
least one profile, and wherein the pitch of the helix is in the
range of 0.1% to 90%, with the pitch being linear or variable in
the length of the helix, and wherein the length of the blade of the
helix is at least 5.degree. of the circumference of the body, and
wherein the body has a surface which is eventually provided with a
wire above the helix, with said wire being shaped to form a thread
on the surface of the body, and wherein the surface of the body is
provided with the wire below the helix, with said wire being shaped
to form a thread on the surface of the body.
19. A pile for a foundation according to claim 18, wherein the body
is provided with a pricker on the bottom end, with the pricker
being bevelled into one surface at least on the bottom part, with
an angle of said bevelled surface being in the range of 90.degree.
to 0.1.degree. toward the vertical axis of the drilling base.
20. A pile for a foundation according to claim 18, wherein the body
is provided with a pricker on the bottom end, and wherein the
bottom part of the pricker has a semi-spherical shape.
21. A pile for a foundation according to claim 18, wherein the pile
is provided with an auxiliary ring on the top end of the body below
the ending.
22. A pile for a foundation according to claim 18, wherein the
ending is provided with a rectification bracket.
23. A pile for a foundation according to claim 22, wherein the
rectification bracket is shaped as a nut.
24. A pile for a foundation according to claim 18, wherein the
ending is shaped as a tube.
25. A pile for a foundation according to claim 18, wherein the
ending is shaped as a flange.
26. A pile for a foundation according to claim 18, wherein the
bottom end of the body has a smaller diameter than the top end of
the body, and wherein an auxiliary helix is located on a transition
between the bottom end and the top end.
27. A pile for a foundation according to claim 19, wherein an
auxiliary ring is provided on the body top part below the
ending.
28. A pile for a foundation according to claim 19, wherein the
ending is provided with a rectification bracket.
29. A pile for a foundation according to claim 28, wherein the
rectification bracket is shaped as a nut.
30. A pile for a foundation according to claim 19, wherein the
ending is shaped as a tube.
31. A pile for a foundation according to claim 9, wherein the
ending is shaped as a flange.
32. A pile for a foundation according to claim 19, wherein the
bottom end of the body has a smaller diameter than a top end of the
body, and further including an auxiliary helix located on a
transition between the bottom end and the top end.
Description
TECHNICAL FIELD
[0001] The device belongs in the field of building industry, i.e.
in concrete terms, in launching projects to establish buildings
located on piles.
BACKGROUND ART
[0002] The piles for lying foundations for buildings can be
installed as combined with earthworks. In practice, such a pile is
inserted into a hole, excavated in the soil beforehand, where it is
neither set nor rectified however. To set and rectify the pile, the
space between the pile and the hole wall must be filled e.g. with
concrete. This solution is disadvantageous due to the necessity
both of excavating (drilling) works, to make a hole in the soil,
and of concreting the space remaining later after the pile
insertion. Therefore, this solution is not suitable from economical
or ecological points of view.
[0003] Another way to install piles for foundation of buildings is
to drill them into the soil. The hitherto known system of
installing the piles by means of drilling in is known e.g. from the
document PUV 2005-16435. This document describes a drilling base
provided, on its bottom end, with a twist drill mounted on a shaft
where the shaft is widened, on the top edge level of the drill,
into the top tube part by a conical section. The twist drill has
equal blade areas in its whole length and is made only in the
extent of 360.degree. on the shaft. This arrangement results in
problematic setting of the drilling base in a rocky soil where the
twist drill can be clogged with stones. Due to clogging, the base
gives up drilling deep into the soil and, if not stopped by the
operating personnel, the twist drill will be totally destructed by
acting of pressure.
DISCLOSURE OF INVENTION
[0004] The main substance of the proposed technical solution is
based on shaping the helix blade of the drilling base. The drilling
base has one helix blade at least. In case the drilling base is
provided with one helix only, the helix is located on the body
bottom part of the drilling base. The helix diameter is in the
range of 1.0 up to 100 multiple of the body diameter and/or of
least transversal dimension thereof. The helix diameter, and due to
it also the surface of its blade, is constant and/or variable
lengthwise. E.g. the helix diameter can increase upwards from
bottom. The helix pitch is given from 0.1% to 90%. Due to this
extent again, diverse variants of the drilling bases can be made
for various kinds of soil or possibly for various types of
considered over-ground devices attached to the drilling base. The
length of the helix blade is 5.degree. of circumference of the body
at least. The harder is the soil in the place of the drilling base
installation the greater is the weight of the over-ground device
and the more intensive is the expected influence of climatic
conditions, the greater must be the helix blade length. It appears
advantageous if the helix blade is longer than 360.degree..
Besides, the body can be provided with more helix blades. The helix
pitch can be linear and/or variable.
[0005] In an alternative solution the drilling base can be provided
with a pricker located on the body bottom part, said pricker
forming the bottom end of the drilling base. Then, the helix is
located either on the drilling base body or on the pricker. The
pricker bottom end is sharpened into one surface at least, namely
at the angle of 90.degree.-0.1.degree. from the vertical axis of
the drilling base. In an alternative solution, the pricker bottom
can have semi-spherical end. The variant of the pricker end is
chosen in accordance with the pricker diameter and with the kind of
soil into which the drilling base is installed. The pricker can be
free or provided with a helix. By means of this solution, diverse
variants of the drilling base can be made which differ by the
helix-to-body diameter ratio. In consequence of it, these various
drilling bases can be utilized for diverse kind of soils (sandy,
stony, or claylike ones), with the greater-helix-diameter drilling
bases being applicable in soft soils especially, e.g. in peat.
[0006] The body can have a closed or also open profile in the
perpendicular cross section. The choice of the profile, of its
diameter and wall thickness is influenced by the soil kind into
which the drilling base has to be set. In some cases the body can
have a polygonal shape in the perpendicular cross section. Although
the drilling base, with a body shaped as a polygon, is difficult to
set, it offers better support in the soil against climatic
influences. Equally, the body can be composed of more mutually
connected profiles where open profiles can be combined with the
closed ones and the round cross sections can be combined with
polygonal ones etc.
[0007] In some cases, the drilling base body can be shaped so that
it has smaller diameter in the bottom part than in its top part.
The body can be widened linearly and/or stepwise towards the top
part. With the stepwise widening, an auxiliary helix is located on
the transition between parts having different diameters. The
auxiliary helix enables to drill the greater-diameter body top part
into the terrain. If greater side forces are assumed to act on the
drilling base, the body can be provided with an auxiliary ring. The
auxiliary ring is mounted in such place of the body that it will be
situated beneath the soil surface with the drilling base being
drilled-in. The auxiliary ring is attached to the drilling base
body by means of a wire weave and serves for usage in a soft
under-bed. For the usage in a hard rocky under-bed, the auxiliary
ring is attached to the drilling base body by means of inclined
felloes. Instead of being filled up with excavation soil, the space
in the auxiliary ring can be possibly set in concrete
afterwards.
[0008] Another possibility to improve the resistance of the
drilled-in drilling base against side forces is to make a welded
wire thread around the whole body to increase the friction between
the drilling base body and the soil in which the drilling base is
located.
[0009] Alternatively, the body top ending can contain a rectifying
element to enable to throw the column or the device (e.g. a solar
panel) out of parallel which are installed on the drilling base
afterwards. In practice as a rule, several screws passing through
nuts, welded to orifices in the body covering, are used as
rectifying elements. The rectifying element is applied in the case
the drilling base cannot be drilled wholly vertically into the
required position, especially in stony soil.
[0010] Another ending can be shaped as a flange perpendicular to
the drilling base body. On the circumference, the flange has
orifices for screws to attach a device which is installed on the
drilling base.
BRIEF DESCRIPTION OF DRAWINGS
[0011] Exemplary realizations of the proposed solution are
described with reference on following drawings:
[0012] FIG. 1--Fundamental embodiment of the drilling base,
[0013] FIG. 2--Alternative solution with an auxiliary ring attached
with felloes and with an auxiliary helix,
[0014] FIG. 3--Alternative solution with the auxiliary ring
attached with a wire weave and with the auxiliary helix,
[0015] FIG. 4--Alternative solution of the small-diameter drilling
base with the rectification,
[0016] FIG. 5--Alternative solution of the drilling base with
flange-type ending,
[0017] FIG. 6--The drilling base composed of several profiles and
helices on the body and on the pricker,
[0018] FIG. 7--The drilling base without a pricker and with several
differently long helices on the body.
BEST MODE FOR CARRYING OUT THE INVENTION
Example 1
[0019] The drilling base, made conformably to the presented
technical solution, consists of the 1650 mm long body 1 with a
diameter of 114 mm. The body 1 is provided with the helix 3 on its
bottom end. The helix 3 is located above the pricker 2 which forms
the bottom part of the drilling base. The blade area of the helix 3
widens from the pricker 2 towards the ending 4 which forms the top
part of the drilling base. In this case the blade of the helix 3 is
25 mm wide at the pricker 2 and 90 mm wide on the top end of the
helix 3. The helix 3 has the extent of 450.degree.. The described
device is evident on the FIG. 1.
Example 2
[0020] The drilling base, made in accordance with the presented
technical solution, has total length of 4800 mm with the body
bottom part 1a being 2600 mm long and having the diameter of 219
mm. The body top part 1b is 1800 mm long with the diameter of 360
mm. In this case, the transition 9 is 200 mm long. On the bottom
end the body 1 is provided with the helix 3. The helix 3 is located
above the pricker 2 which forms the bottom part of the drilling
base. The blade area of the helix 3 widens from the pricker 2
towards the ending 4 which forms the top part of the drilling base.
In this case the blade of the helix 3 is 50 mm wide at the pricker
2 and 120 mm wide on the top end of the helix 3. The helix 3 has
the extent of 450.degree.. The auxiliary helix 7 is located on the
transition 9. Above the transition 9 the auxiliary ring 5 is
attached on the body top part 1b by means of the wire weave 11. On
the body top part 1b the auxiliary ring 5 is mounted so high that
it is to be found under the earth surface with the base being
drilled in. The part of the body 1, located under the earth surface
after the base setting, is provided with the wire 8 on its surface,
said wire 8 being shaped to form a thread on the body 1 of the
drilling base.
[0021] In this case the ending 4 is adapted, by means rectification
brackets 6 in a form of screws and nuts 12, to assemble a tracker
which is used to support a solar panel.
[0022] The described device can be seen on the FIG. 3.
Example 3
[0023] The drilling base, according to the proposed technical
solution, consists of the body 1 with the pricker 2 situated on the
bottom end. In this case the body 1 consists of more profiles with
different diameters and the bottom part of the pricker 2 is
bevelled by one skew cut at the angle of 45.degree. towards the
vertical axis of the drilling base. To the pricker 2 the conical
part of the body 1 is coupled on which the cylindrical part of the
body 1 is located consisting of a steel tube. On the pricker 2 and
on the conical part the helix 3 is placed. The prolongation of the
helix 3 to the pricker 2 and the form of the pricker 2 facilitate
to locate the drilling base into very hard soil. In the present
case, this helix 3 has the pitch of 15% with the area of its blade
and its diameter increasing from the bottom part of the drilling
base towards the ending 4. The first helix is 540.degree. long and
its maximum diameter equals 1.9 times the diameter of the given
part of the body 1. To the cylindrical part of the body 1, further
conical part or the transition 9, are coupled respectively. On the
transition 9, the auxiliary helix 7 is placed. The auxiliary helix
7 is 360.degree. long, its pitch equals 15% and the area of its
blade does not change lengthwise. The diameter of the auxiliary
helix 7 equals 1.3 times the given part of the body 1. On the
transition 9, the body top part 1b links up which consists of a
close steel hexagonally shaped profile.
[0024] The described solution is obvious on the FIG. 6.
Example 4
[0025] The drilling base, in accordance with the proposed technical
solution, is composed of the body 1 consisting of one profile. On
the bottom part of the body 1 a cone is located which is rounded on
the bottom end. In this case, on the cone the helix 3 is located
the pitch of which is 25% and the length is 360.degree.. The area
of the blade of the helix 3 and its diameter as well increase from
the bottom part of the drilling base towards the ending 4 in this
case. In this case, the maximum diameter of the helix 3 is 2.8
times the diameter of the given part of the body 1. On the
cylindrical part of the body 1, several other helices 3 are
located. These further helices 3 have the length of 50.degree. and
the pitch of 25%. The base drafted in such a way is suitable to
support light over-ground devices in very soft soils.
[0026] The described solution can be seen on the FIG. 7.
LIST OF REFERENCE SYMBOLS
[0027] 1--body [0028] 1a--body bottom part [0029] 1b--body top part
[0030] 2--pricker [0031] 3--helix [0032] 4--ending [0033]
5--auxiliary ring [0034] 6--rectification bracket [0035]
7--auxiliary helix [0036] 8--wire [0037] 9--transition [0038]
10--felloe [0039] 11--wire weave [0040] 12--nut [0041]
13--flange
* * * * *