U.S. patent application number 10/487362 was filed with the patent office on 2004-12-02 for disjointable fixing apparatus of tension member and removal method of tension member.
Invention is credited to Park, Byung Gu.
Application Number | 20040237431 10/487362 |
Document ID | / |
Family ID | 19713678 |
Filed Date | 2004-12-02 |
United States Patent
Application |
20040237431 |
Kind Code |
A1 |
Park, Byung Gu |
December 2, 2004 |
Disjointable fixing apparatus of tension member and removal method
of tension member
Abstract
The present invention relates to a tension member removable
anchoring apparatus and a method of removing the tension member by
separating the tension member from an anchor by using a repulsive
force occurred at the time of removing tensility in order to pull
out the tension member. The above features and other advantages of
the present invention will make a disassembly and an installation
easier.
Inventors: |
Park, Byung Gu;
(Kyeonggi-do, KR) |
Correspondence
Address: |
ROSENBERG, KLEIN & LEE
3458 ELLICOTT CENTER DRIVE-SUITE 101
ELLICOTT CITY
MD
21043
US
|
Family ID: |
19713678 |
Appl. No.: |
10/487362 |
Filed: |
February 20, 2004 |
PCT Filed: |
November 21, 2001 |
PCT NO: |
PCT/KR01/01993 |
Current U.S.
Class: |
52/223.1 |
Current CPC
Class: |
E21D 21/0026 20130101;
E02D 5/765 20130101 |
Class at
Publication: |
052/223.1 |
International
Class: |
E04C 005/08 |
Foreign Application Data
Date |
Code |
Application Number |
Aug 29, 2001 |
KR |
2001-0052383 |
Claims
What is claimed is:
1. A tension member removable anchoring apparatus, comprising: a
trichotomized wedge support spring for preventing a regress of a
trichotomized wedge in an upper portion; a cap coupling to the
trichotomized wedge support spring; a cylinder coupled to the cap;
an anchor inserted in a central hole of the cylinder and including
the trichotomized wedge binding a single line of a tension member,
a fixer made of a casting and having the tension member inserted
therein; and a coupling means for coupling the anchor and the
fixer.
2. (cancelled)
3. The apparatus of clam 1, wherien in the anchor, there is a punch
on is a lower side of the cylinder and a stopping spring bolt
preventing a return of the regressed trichotomized wedge in the
punch.
4. The apparatus of claim 1, wherein the anchor has a coupling
portion coupled to the coupling measn in a lower end of the
cylinder.
5. The apparatus of claim 4, wherein the coupling means is a
nipple, a socket or one-way nipple for coupling the anchor and the
fixer.
6. The apparatus of claim 1, wherein the fixer has a shape that the
tension member is inserted therein and a coupling portion is
coupled to the anchor when the coupling means is inserted
therein.
7. The apparatus of claim 1, wherein a single line of tension
member is inserted in the fixer to cofigure the straight anchoring
appratus.
8. The apparatus of claim 6, wherein the fixer can be used
separately or purally.
9. A method of removing a tension member, comprising: a repulsive
greater than a conservative force of a trichotomized wedge support
spring working on an anchor; the trichotomized wedge support spring
compressed by the repulsive force of the tension member; the
trichotomized wedge regressing to a space in a cylinder generated
during compressing the spring; a play of the trichotomized wedge
becoming open; a return of the regressed trichotomized wedge
stopped by a detent of a stopping spring bolt supporting a return
of the trichotomized wedge; separating the tension member from the
trichotomized wedge whose fall is stopped in a state that a play is
maintained; and removing the tension member by pulling the tension
member after separating the anchor.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] The present invention relates to an anchoring apparatus used
for a public work or construction work, and more particularly, to a
tension member removable anchoring apparatus which is easy to
install and has a structure that a tension member is removable
after achieving a purpose thereof.
[0003] 2. Description of Related Art
[0004] In conventional art, an anchor is one which supports an
earth wall temporarily installed to prevent a ground subsidence
when a basement facilities are constructed. The anchor is
classified into a permanent ground anchor and a temporary ground
anchor according to a use. The permanent ground anchor is installed
to prevent a separation or transformation of construction or
structure when the construction or structure is installed at like
underground water exudation place or a gradient place. The
temporary ground anchor is a fixing structure which is removed
after a construction work is completed. In particular, in the case
of the permanent ground anchor, a tension member remaining under
the ground can be an underground obstacle and can cause a problem
in construction work such as a right to be compensated for
underground facilities. Therefore, an installation and disassembly
of the temporary ground anchor are current interest and are the
main current of a technology development.
[0005] Hereinafter, anchor-related conventional technologies are
described.
[0006] A first conventional art (Korean Patent Publication No.
2001-11265) has an object to support a huge anchoring load by
anchoring the much larger number of tension members than the number
of wedge. The first conventional art provides an anchoring device
for a permanent ground anchor which can stabilize a construction
work requiring a huge load by minimum wedges receiving maximum
tension members to use a compression intensity of tension member at
maximum. The first conventional art is a permanent ground anchor in
which in a body having a wedge groove corresponding to a wedge
groove of a wedge trough ay locations where a tapered inner
circumference surface is divided, a wedge trough having a wedge
groove corresponding to the wedge groove in an outer circumference
surface tapered in the same direction and a wedge groove
corresponding to a wedge groove of a central wedge in an inner
circumference surface tapered in the same direction is inserted,
and in a wedge trough a central wedge having a wedge groove having
a reversed cone shape tapered corresponding to an inner
circumference surface thereof and corresponding to the wedge groove
in an outer circumference surface, and a cover is arranged on an
apex of the body.
[0007] A second conventional art (Korean Patent Publication No.
2001-16726 has an object to easily remove an installed tension
member by using a remove tension member, and relates to a temporary
ground anchoring apparatus and a method of removing a tension
member which complement a shortcoming which cannot be resolved by
the first conventional art. A hanging wall is formed on an upper
side of an inner circumference surface, and a central hole is
formed in the middle of the upper side isolation hanging wall, and
a plurality of outer holes are radially formed. The temporary
ground anchoring apparatus includes a cylinder having a hanging
projection on an inner circumference surface of the central hole, a
plurality of straining wedge inserted in the central hole of the
cylinder to couple the tension member, a central member inserted in
the central hole of the cylinder, formed in a cylindrical form and
having a taper-type inserting portion formed on an inner upper side
and a guide portion formed an inner lower side, an anchor remove
tension member wedge inserted in the taper-type inserting portion
of the central member and having a tension inserting hole which the
tension member is inserted in and coupled to and an anchor remove
tension member wedge stopping member used to isolate the tension
member from the tension wedge, a cylinder base defining a lower
portion of the cylinder, allowing a path of the tension member and
forming a projection on which an anchor remove tension member
binding wedge member, a waterproof ring and a cap located on a
waterproof ring placing projection of the cylinder base to prevent
a water or a mortar infiltrating into an inner side of the cylinder
from an external portion, and a fixer. The method of removing the
tension member includes the central member suppressing a pressure
generated in the anchor straining tension wedge by a repulsive
force of the anchor remove tension member, fracturing the hanging
projection and seceding from proper place thereof when the tension
member is removed, and the tension member separating from the
anchor remove tension member wedge after the anchor remove tension
wedge of the central member contacts the anchor remove tension
wedge stopping member.
[0008] A third conventional art (Korean Utility Model No. 163598)
relates to an anchoring apparatus which can install and remove a
tension member easily. The third conventional art has an object to
provide a tension member removable anchoring member of a ground
anchor in which a structure is simple, a manufacturing and assembly
are improved due to a reduction of a part number, a weight is
light, a reliability to remove the tension member is improved, and
the tension member can be removed by hand without using a drawing
machine. The tension member is removed by engaging at least two
tension members put into a rear of a body by a wedge in the body
and removing an engagement between the tension member and the wedge
by a manipulation outside an anchor hole. A wedge trough support
placing projection is formed in an inner circumference surface
lower end of the body, a wire hole for wire penetration of a wedge
trough support is punched on the projection, a donut-type wedge
trough support that an electric heating element connected to a wire
is buried in a thermal decomposition thermoplastic resin is located
on the projection, a is wedge trough in which wedge grooves of less
than semicircle are formed at location where the circumference is
divided in the taper hole is inserted into the body ad placed on
the wedge trough support, a monolithic wedge in which the same
number of wedge grooves as the wedge groove in the taper surface of
an outer circumference are inserted in the wedge trough and placed
on the wedge trough support, a cover is put on an apex of the body
and fixed, a bolt is put into a bolt hole formed in a center of the
cover and is coupled to an upper end of the wedge.
[0009] As described above, the anchor-related conventional
technologies are inventions that are configured to remove a tension
member after achieving an installation purpose of an anchor.
[0010] In the first conventional art (Korean Patent Publication No.
2001-11265), there is an advantage in that a huge anchoring load
can be supported by anchoring the number of tension members much
larger than the number of wedge, while there is a disadvantage in
that the tension member cannot be removed later.
[0011] In the second conventional art (Korean Patent Publication
No. 2001-16726), this is to easily remove the installed tension
member using a remove tension member. But, this has a disadvantage
in that a structure of anchor is complicated, the number of
component parts is many, a manufacturing cost is increased due to
an addition of the remove tension member, and a work of the remove
tension member is added. In particular, a shape is very
complicated, and thus a processing and assembly are very difficult.
This lowers a work efficiency. If a repulsive force is applied to
the tension member when the remove tension member becomes loose by
a manipulation mistake before the remove tension member is removed,
the remove tension member can come out. As a result, the central
member which should regress does not regress, so that the straining
tension member wedge is not estranged and all tension members
becomes unremovable. Therefore, the rest straining tension members
cannot be removed.
[0012] In the third conventional art (Korean Utility Model No.
163598), this is simple in structure and easy to install. But,
since an electric heating element connected to wire is buried in
the thermal decomposition thermoplastic resin, an electric device
is used to remove the tension member. Therefore, a process for
removing the tension member is complicated. When the anchor is
reused, the electrical heating member should be buried in the
thermal decomposition thermoplastic resin.
[0013] In the case of the conventional anchoring apparatus, in
order to remove the tension member after the tension member is
installed, the tension member is covered with a coating, and the
tension member temporarily installed in the ground is removed using
like drawing machine. When the tension member is temporarily
installed, a bending process is performed in order to prevent a
separation and a transformation of the tension member. Therefore, a
drawing work is difficult when the tension member is removed, and a
huge power is required to remove the tension member, and the
drawing work is dangerous as much.
SUMMARY OF THE INVENTION
[0014] To overcome the problems described above, preferred
embodiments of the present invention provide a simplified
installation work and an easy ordinary work by simplifying a
structure of anchor to increase a mechanical reliability of anchor
and using an anchoring apparatus including a tension member
therein.
[0015] In order to achieve the above object, the preferred
embodiments of the present invention provide a tension member
removable anchoring apparatus, comprising: an elastic means for
preventing a regress of a trichotomized wedge in an upper portion;
a cap coupling to the elastic means; a cylinder coupled to the cap;
an anchor inserted in a central hole of the cylinder and including
the trichotomized wedge binding a single line of a tension member;
a fixer made of a casting and having the tension member inserted
therein; and a coupling means for coupling the anchor and the
fixer.
[0016] The present invention further provides A method of removing
a tension member, comprising: a repulsive greater than a
conservative force of a trichotomized wedge support spring working
on an anchor; the trichotomized wedge support spring compressed by
the repulsive force of the tension member; the trichotomized wedge
regressing to a space in a cylinder generated during compressing
the spring; a play of the trichotomized wedge becoming open; a
return of the regressed trichotomized wedge stopped by a detent of
a stopping spring bolt supporting a return of the trichotomized
wedge; separating the tension member from the trichotomized wedge
whose fall is stopped in a state that a play is maintained; and
removing the tension member by pulling the tension member after
separating the anchor.
BRIEF DESCRIPTION OF THE DRAWINGS
[0017] For a more complete understanding of the present invention
and the advantages thereof, reference is now made to the following
descriptions taken in conjunction with the accompanying drawings,
in which like reference numerals denote like parts, and in
which:
[0018] FIG. 1 is a configuration view of a tension member removable
anchoring apparatus including a tension member remove anchor, a
coupling means and a fixer made of a casting according to the
present invention;
[0019] FIG. 2 is an exploded view illustrating a cylinder and a
straining tension member wedge;
[0020] FIG. 3 shows parts of a tension member remove anchor;
[0021] FIG. 4a is a view illustrating an installed state of a
nipple and a socket;
[0022] FIG. 4b is a view illustrating an installed state of one-way
nipple;
[0023] FIG. 5 is a cross-sectional view illustrating the fixer made
of a casting;
[0024] FIG. 6a is a view illustrating an installed state of a
tension member of a tension member remove anchor;
[0025] FIG. 6b is a view illustrating a process for removing the
tension member of the tension member remove anchor; and
[0026] FIG. 6c is a view illustrating a removed state of the
tension member of the tension member remove anchor.
DETAILED DESCRIPTION OF PREFFERED EMBODIMENTS
[0027] Reference will now be made in detail to preferred
embodiments of the present inventior, example of which is
illustrated in the accompanying drawings.
[0028] Referring to FIG. 1, an anchoring apparatus according to the
present invention includes a tension member remove anchor 10, a
fixer 60 made of a casting including a tension member therein, and
a coupling nipple 20 and a socket 30 coupling the tension member
remove anchor 10 and the fixer 60.
[0029] Referring to FIG. 2, the tension member remove anchor 10
includes a cylinder 70 and a trichotomized wedge 110 of FIG. 2, a
cap 120 and a wedge support spring 130 of FIG. 3, and a stopping
spring bolt 150 supporting a comeback of a wedge.
[0030] The cylinder 70 has stopping spring bolt perforations 80
formed at both sides thereof into which the stopping spring bolts
150 are inserted, and a coupling portion 100 formed in a lower end
thereof which is coupled to the nipple 20, and a wedge support
spring 130 and a spring cap which are mounted in an upper end of
thereof. The wedge support spring 130 which is a part of the
tension member remove anchor 10 is a spring manufactured by
controlling an elastic coefficient to endure a predetermined load.
The stopping spring bolt 150 includes a forward spring 140 and a
detent 170 as shown in FIG. 3.
[0031] Referring to FIG. 4a, a coupling means for coupling the
tension member remove anchor 1Q and the fixer 60 is the nipple and
the socket. FIG. 4 shows the fixer 60 and the nipple 20 and the
socket 30. As shown in FIG. 4a, a coating 40 is inserted in a
coupling means 180 including the nipple 20 and the socket 30 to the
socket 30, and only the tension member is inserted after the nipple
20, and a tension member coating is caught by a projection of the
nipple 20 in the socket 30.
[0032] Here, the tension member coating 40 is one which the tension
member is covered with a coating and makes a drawing work performed
by a human force without using a drawing machine.
[0033] Referring to FIG. 4b, a one-way nipple 200 has similar form
and function to a coupling means including the nipple 20 and the
socket 30. The one-way nipple 200 has a male screw at one end
thereof and a catching projection in the middle thereof, so that
the male screw is screwed to the tension member remove anchor
10.
[0034] Referring to FIG. 5, the coupling means 180 is inserted into
the fixer 60 and located at an end of the fixer 60 to couple to a
coupling portion 100 of the cylinder 70, so that the tension member
remove anchor 10 is integrated with the fixer 60.
[0035] Referring to FIG. 6a, the tension member remove anchor 10
serves to maintain a tension member inserted therein. At this time,
the taper type trichotomized wedge 110 is located to be inserted in
a taper-type groove inside the cylinder 70 and coupled to the
tension member 50 inserted in a tension member inserting hole 90 in
the lower end of the cylinder 70. As a repulsive force is
increased, an inside pressure of the cylinder 70 is increased. As a
result, a play of the trichotmized wedge 110 becomes narrow and a
horizontal pressure is increased, whereby a binding force to the
tension member 50 is increased.
[0036] Referring to FIG. 6b, the tension member 50 installed in the
tension member remove anchor 10 endures a support force of the
support spring 130 by a repulsive force resulting from removing a
tension force to push up the trichotomized wedge 110, so that a
play of the trichotomized wedge 110 is increased and a horizontal
pressure between the trichotomized wedge and the tension member is
decreased, whereby a binding force disappears. At this time, the
detent 160 of the stopping spring bolt 150 fixed by the
trichotomized wedge moves forward to an inner portion of the
cylinder 70 at the same time when a restriction of the forward
spring 140 disappears, thereby preventing a comeback of the
trichotomized wedge. After all, the trichotomized wedge is stopped
by the detent, so that a horizontal pressure and a play of the
trichotomized wedge are maintained and the tension member can be
easily removed.
[0037] In particular, the support spring 130 of the trichotomized
wedge is compressed when a load of more than predetermined amount
is applied to allow the trichotomized wedge to regress, and so a
regress of the trichotomized wedge due to a load of less than a
predetermined amount, an external shock or a crack of the tension
member grouting is prevented, thereby improving a mechanical
reliability of the anchor.
[0038] FIG. 6c shows a state that the tension member is completely
removed, in which the trichotomized wedge is caught by the detent
160 of the spring bolt 150 so that a return of trichotomized wedge
is prevented.
[0039] The fixer 60 of FIG. 5 has a tension member inserted in a
center thereof. When the conventional fixer requires an external
bending process when the fixer is mounted. But, the tension member
is inserted in the fixer 60 of the present invention and does not
require an additional bending process.
[0040] As shown in FIGS. 1 and 5, the tension member remove anchor
has the coupling portion 100 coupled to the coupling means in the
lower portion of the cylinder 70. Thus, the tension member remove
anchor 10 and the fixer 60 including the tension member can be
coupled by a simple manipulation, leading an excellent working
performance and a mechanical stability.
[0041] As described above, the present invention is an anchor
system including the tension member remove anchor for a single line
of tension member, the fixe; not requiring a bending process and
made of a casting, and a coupling means coupling the tension member
remove anchor and the fixer, and unlike the conventional anchor, it
has a structure of a tension member of a single line and is simple
in structure, has a low manufacturing cost by reducing the number
of parts of the anchor, has a significantly excellent working
performance compared to the conventional anchor to thereby reduce a
working time, and a reliability for a mechanical function of the
anchor is very high since it has a simple structure.
[0042] The trichotomized wedge support spring is mounted inside the
anchoring apparatus, so that a movement of the trichotomized wedge
due to an external shock is prevented to maintain a force binding
the tension member. Since it has a structure that the tension
member is easily removed using a repulsive force resulting from a
remove of the tension member unlike the conventional anchor, a
working time to remove the tension member is shortened.
[0043] It has a structure that the tension member is inserted the
fixer made of a casting, and so a transformation and a twist of the
tension member is prevented. Since the bending process is performed
directly on the tension member, the tension member can be easily
removed, and an installation work is also simple.
[0044] Unlike the conventional U-turn anchor, a straight tension
member is used, and so a separate fixer is not required in the
grouting portion. In particular, a length of the tension member
used in the drawing work is reduced in half, the tension member is
easily removed, and the drawn tension member is reused and thus
economical.
[0045] While the invention has been particularly shown and
described with reference to preferred embodiments thereof, it will
be understood by those skilled in the art that the foregoing and
other changes in form and details may be made therein without
departing from the spirit and scope of the invention.
* * * * *