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Патент USA US2133563

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Oct. 18, 1938.
Filed NOV. ll, 1935
2 Sheets-Sheet 1
oct. 1s, 193s».
Filed Nov. ll, 1935
2 Sheets-Sheet 2
Patented oct. 1s, 193s
Joseph A. Parks, Jr., Milton, and John Upton,
Wayland, Mass., assignors, by mesne assign
ments, to Anderson Products, Incorporated, a
corporation of Massachusetts
Application November 11, 1935, Serial No. 49,170
14 claims. (c1. 61-63)
This invention relates to a method and means
of splicing structural columns. While this invention may be used to splice structural steel col-
The upper end of the pile is wedged in position
under the structure it is intended to support and
thereafter secured thereto.
umns, its most common application is in the ` Since the big bulk of the piles in harbor use
C1 splicing of wooden columns, particularly wooden
support vertical loads principally and are rarely 5
piles such as are commonly used in river and harbor Work either as the support for docks, piers or
other structures positioned over the water or in
splicing piles for other marine purposes such as
10 slips, retaining walls, or for any other purpose
where it is necessary from time to time to replace
a pile,
In coastal waters of the United States certain
marine animals particularly amphipod Crustacea
l5 known as the Chelura, Limnoria and the teredo
have infested many harbors where they were previously entirely unknown. These borers feed actively on wood and are particularly destructive
to piles if the piles had not been originally treated
-20 with some protective substance, as for example,
is relatively loose.
In the harbors where these amphipoda are destructively prevalent at present, practically all of
the piling was placed before these creatures made
25 their appearance in these particular localities. As
a consequence, therefore, the big bulk of the pil-
ing'in these places is entirely unprotected and
subject to the ravages of the aforementioned
subjected to serious lateral strains, the aforemen
tioned procedure might seem to be a satisfactory
solution. However, in actual practice it has been
found impossible to cut the end of the old pile and
the bottom end of the new portion that is to be 10
placed thereon at such angles that when the new
portion has been positioned the end surfaces will
be in contact throughout their areas. Tlns >re
sults in the entire vertical load being carried by
relatively small portions of the engaging faces l5
with the result that the replaced upper portion
soon settles materially under the pressure to say
nothing of the fact that it will often slip sideways
vif there is any particular angularity to the en
gaging faces since the cylindrical retaining shell 20
Thus, by the old method a pile repaired in this
manner was relatively unsatisfactory due te its
inabilitir t0 properly SllpDOl‘t the 10a-C1 fOl’ 21115’
length of time without settling; to say nothing 25
of the fact that it had practically no lateral
By our invention which will be disclosed here
inafter, we are enabled to position a new section
As the pile is gradually eaten away there comes
a time when it can no longer properly support the
load it is called upon to carry and it is necessary,
therefore, to replace the damaged pile in some
of pile on top of the old portion remaining in the 30
bed in such a way that it will have substantially
all the properties of the original pile, that is to
say, the new portion will not settle nor can it shift
Heretofore the practice has been to send a
diver down alongside the pile and, by means
laterally with respect to the bottom portion. At
the same time thecost of replacing the pile by our 35
method is less than the cost of the present method.
In the accompanying drawings:
Fig. 1 shows a pile eaten away to such an extent
that replacement is necessary.
Fig. 2 shows the damaged portion ci the pile 40
removed and our splicing unit about to be lowered
of a power saw operating in a horizontal plane,
cut the pile off a short distance above the mud
line or the bottom from which the pile projects.
40 Then, upon unfastening the pile from the struc-v
ture it is assisting to support at its upper end, the
damaged portion of the pile may be removed.
That part of the pile which remains in the bottom
will generally be found to be in good condition as
43 the borers do not usually attack that portion of
the pile close to the bottom or that part which is
‘in place.
- Fig. 3 shows our splicing unit in place on the
bottom portion of the pile.
Fig. 4 shows the new pile in position and se- 45
cured to the lower portion by our splicing unit.
embedded in the bottom.
’ Fig. 5 is a vertical section on the line 5-5 of
Thereafter a new pile about the same length as y Fig. 3.
the damaged portion that has been removed and
5o roughly the diameter of the portion remaining
in the bottom is lowered into place on top of the
>bottom portion. Heretofore the old and the new
parts have been held in alignment by means of a
loosely fitting, cylindrical metal sleeve which sur-l
.55 rounds the old and the new portions at the joint.
Fig. 6 is a vertical cross-section of our pile
splicing unit.
Fig. '7 is a vertical view of our pile splicing unit.
Fig. 8 is a perspective view showing the means
used to carry the unit to its position over the pile.
Fig. 9 shows means for preventing our splicing
unit from settling into a soft bottom.
Fig. 10 shows other means for preventing our _for in the form of helical member 30 to which
unit from settling into a soft bottom, being a is wired or otherwise secured at various points
about its circumference vertical reinforcing mem
view on line IU-Ill of Fig. 11.
Fig. 11 is a vertical cross-sectional View on the bers 32. Both the helical and vertical reinforce
ments are suspended above the bottom of the
line II-II of Fig. 10.
unit by means of the wires 34 which may be at
Referring now more specifically to the draw
ings, Figs. 1 to 4 inclusive show the general series tached to the main wire supports I8, as shown,
or to the shell I4 if more convenient.
of operations involved in the practice of our in
The size of the unit in actual practice is about
vention, while Figs. 5 to 11 inclusive disclose the
36 inches high and 20 inches in diameter with 10
10 details of construction of the unit.
In Fig. l a pile 2 having a lower end 3 has been the helical reinforcement 30 of sufficient diam
eter to permit the entrance of any pile ordinarily
driven into the bottom 4 and is shown as sup
porting a structure 6, which in this case is above encountered.
With the shell I4, bottom 21 and reinforcements
th-e surface of the water 8.
36 and 32 all suspended from the spider 22, as 15
Due to the destructive work of the aforemen
tioned amphipoda the pile has been eaten away shown at Fig. 8, the unit is then filled with con
at Ii) to such an extent that it is materially crete to within a few inches of the top, although
weakened and should be replaced if it is to con-l if waste of concrete is no consideration, the unit
could be entirely ñlled. It is believed clear from
tinue as a proper support.
In carrying out the method of our invention the construction shown in Fig. 6 that the weight 20
of the concrete will be carried by the bottom 21
a diver is sent down and on inspecting the con
dition of the pile, saws it off at I2 as in Fig. 2, which in turn is supported on ring I6 by wires
I8, and that the hooks 24 >do not carry the weight
which point is below the damaged portion of the
pile. In the best practice it is contemplated that
25 the upper end i2 of the pile 3 shall be a distance
above the bottom equal to approximately half
the length of our splicing unit. In practice the
length of the projecting pile is about 18 inches.
If the point at which the pile is cut happens
30 to be closer to the bottom, then a suitable amount
guided by the diver to a position over end I2 of
of the bottom immediately surrounding the pile
portion 3 of the old pile.
is cleared away by the diver so that there will
be the proper distance from the upper end of
is lowered on the pile so that the circumference
of the upper end of the pile encounters the sec
tions 26 of the bottom 21. As the unit is lowered
the pile 3 to that part of the bottom immediately
35 surrounding the pile.
The upper portion of the damaged pile is then
removed, the supported structure 6 being main
tained in position temporarily by adjacent piles.
With the bottom portion of the pile thus pre
40 pared it is now in condition for the application
of our splicing unit.
The unit is shown in detail in Figure S5, 6, '1, 8,
9 and 10. The unit consists of a cylindrical shell
I4 open at both ends and preferably made of
45 sheet metal which may be cheaply and easily
Positioned within the shell a short distance
above the bottom is a ring I6 ñtting the shell
rather closely, but still free to move with rela
tion thereto. The ring I6 is suspended by three
wires I8 positioned 120° apart, as shown in Fig. '1.
The upper ends of the wires I8 have hooks 20
for engagement with cooperating means on a
spider 22 shown in Figs. 2, 3 and 8. Attached to
the top of the shell and spaced 120° apart are the
hooks 24 which are adapted to engage the spider
22 in the same manner as the wires I8.
By the foregoing arrangement both the shell
I4 and the ring i6 may be suspended from the
60 spider 22.
To provide a bottom for this unit we use a
number of trapezoidal shaped sheet metal sec
tions 26 the wide ends of- which rest on the ring
I6. The various sections 26 form a pyramidal
21 the small ends of the sections engag
ing a keystone member 28. It is clear, however,
that the bottom may be made of sections of vary
ing shapes provided they meet to give the neces
sary truss action to support any loads that may be
of the concrete, but simply hold shell I4 in posi
tion. The clearance between ring I6 and shell
I4 and between the sections 26 of the bottom 21
is sufficiently small so that the concrete cannot
leak through.
The unit is then lowered into the water and
imposed thereon.
The bottom construction just described results
in what we term a collapsible bottom the action
of which will be described hereinafter.
As our splicing unit is subsequently to be filled
75 with concrete, we provide reinforcement there
Thereafter the unit
still farther, the collapsible bottom engages the
circumference of the top of the pile, resulting
in the following composite and continuous action
When the pile encounters the collapsible bot
tom, the bottom and the concrete supported
thereby are necessarily retarded in their descent.
However, the shell I4 and the supporting ring I6,
because of their inertia, continue downwardly.
As the ring I 6 commences to fall away from
the outer edges of the bottom sections 26, the .
weight of the concrete causes the sections to pivot
about the circumference of the upper end of the
pile, the outer ends of the sections 26 rotating
inwardly to finally slip off the inner circum
ference of ring I6 while at the same time the
inner ends of the bottom sections 26 necessarily
rotate outwardly.
When this action has been completed, the shell
I4 will be resting on the bottom and theV sec
tions will be in substantially the position shown ,
in Fig. 3.
In cases where the harbor bottom is not sum
ciently firm to prevent the shell from cutting
thereinto, we provide a stop either in the form of
a plate of sheet metal having a hole therethrough
slightly larger than the pile which may be
dropped over the end of the pile prior to the positioning of the container as shown in Fig. 9, or in
the form of outwardly extending flanges project
ing from the lower edge of the bottom of shell I4,
as in Figs. l0, 11.
It will also be observed in Fig. 3 that the helical
reinforcement has also been carried down about
the upper end of the pile. The keystone 28 is
resting on the upper end of the pile and the sev 70
eral sections 26 are in a generally vertical posi
tion in the concrete about the pile. The diver
then disconnects the'spider from the various wires
that have supported the shell, the bottom and the
reinforcement and the spider is withdrawn.
The new section of pile 36, which may be cut
several inches shorter than the damaged portion
previously removed, is then lowered into the wa
tional generally pyramidal bottom, supported by
ter. The diver guides the lower end of the new
a member positioned within the lower part of
section into the upper end of sleeve i4; the pile is
forced downwardly through the concrete which
is of a consistency to permit entrance of the pile
without undue diñiculty. When the pile has en
tered the concrete to a suiiicient depth, the upper
said casing.
end of the new section 36 is swung under the
structure 6 which is to be supported.
The combined buoyancy of the concrete in
which the end of the pile 36 is resting and the
water thereabove is sunicient to cause the pile 36
to tend to move upwardly against the structure
6. Because of this fact the new pile 36 is self
positioning and no wedges need to be positioned
between the upper end of the pile and the struc
ture 6. See Fig. 4.
The concrete thereafter hardens, resulting in
the old embedded portion 3 of the pile and the
new section 36- being firmly and adequately
spliced together by a reinforced concrete cyl
inder. Since the space between the abutting ends
25 of the pile is completely filled with concrete, it is
immaterial whether the ends of the pile are cut
square or not since the load is distributed over
the entire area due to the fact that both ends of
these members are always in contact with con
30 crete therebetween and a direct transference of
load is effected thereby.
6. For use in connecting columns, a tubular
casing having a sectional pyramidal bottom
therefor adapted to open when moved upwardly
by engagement with a column, said bottom nor
mally maintained in position within said casing
by a ring independently suspended within said
casing, and a circular reenforcing member posi
tioned within said casing above said bottom.
7. A containing unit comprising a tube, sus
pension means therefor, a sectional bottom with
in said tube suspended from said suspension
the repaired pile is stronger at the point of splice
35 than the original pile, and there is no possibility
means, and reenforcements within said tube sus
pended from said suspension means whereby said
tube, bottom and reenforcements may be main
tained in ñxed relative positions.
8. A bottom for a container comprising a cir
cumferentially extending ring, a plurality of sec
tions arranged to form a generally pyramidal
bottom, the outer end of each section supported
by said ring, the inner end of each section sup
ported by its coaction with the other sections.
9. A concrete positioning device comprising a
tubular shell, an interiorly disposed supporting
member Within said shell, a sectional trussed bot
tom generally pyramidal in form; said bottom 30
of the new portion of the pile settling with rela
said shell.
10. A concrete positioning device comprising a
tubular shell and a collapsible trussed bottom
generally pyramidal in form, said bottom com 35
tion to the old portion nor can the new portion
prising a plurality of tapered sections, a member
bordering the internal circumference of said
shift laterally with respect to the old portion.
While the foregoing description discloses a
shell, means connected to said member and ex
40 specific means of practicing our invention, we do
not intend that our invention shall in any way
be limited thereby, but only as deñned by the
appended claims.
We claim:
1. A concrete positioning device comprising a
tubular shell and a sectional arched bottom gen
erally pyramidal in form, a ring secured within
said shell, said bottom maintained in position by
vertical engagement with said ring and by hori
zontal radial engagement with said shell. _
2. A collapsible bottom for a concrete container
comprising tapered sections supported at their
wide ends by a ring and at their small ends by a
supported by said member to substantially close
By the foregoing means and method we are
able to repair damaged piles in such a way that
5. Means for positioning a quantity of con
crete, comprising a tubular shell having a sec
3. For use in connecting columns, a unit com
prising a tubular casing having a sectional truss
like bottom generally pyramidal in form, a sup
porting ring positioned within the lower portion
0f said’casing and supporting said sectional bot
tom, means connected with said ring and extend
ing upwardly within said casing and carrying the
vertical load to which said ring and bottom are
. subjected, circular reenforcements within said
casing and means for suspending said reenforce
ments in fixed relation with said casing and bot
4. A containing unit, comprising a tube, de
tachable suspension means therefor, a pyramidal
sectional bottom within said tube detachably sus
pended by members connected with said suspen
sion means, and reenforcements suspended in
fixed relation with said bottom within and sub
stantially concentric with respect to said tube.
tending upwardly for maintaining said member
in position, said sections maintained in position 40
at their outer ends by engagement with said mem
ber and at their inner portions by mutual truss
like action.
11. Means for positioning a quantity of con
crete, comprising a tubular shell, interiorly cir 45
cumierentially extending means fixed in relation
to said shell, a bottom comprised of independent
sections arranged to form a generally pyramidal
structure, the outer ends of said sections resting
on said means, and the inner ends of said sec
tions supporting each other.
12. A container comprising a tubular shell, an
interiorly circumferentially extending member
secured at the lower portion of said shell, and a
bottom comprised of independent sections, said 55
sections converging at the center to support each
other, the outer ends of said sections resting on
said member.
13. A containing unit, comprising a tube, sus
pension means therefor, a sectional bottom with 60
in said tube suspended by means connected With
said suspension means, and reinforcements with
in said tube substantially concentric therewith.
14. Means for positioning a quantity of con
crete comprising a shell, a generally pyramidal 65
sectional bottom therefor, supported by a cir
cumferential member maintained within said
shell, and common suspension means whereby
said shell and member are maintained in ñxed
relative positions.
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