Title of Invention

APPARATUS FOR FIXING A STEEL WIRE OF A WALE

Abstract The present invention provides an apparatus for fixing a steel wire of a wale. In an embodiment, the present invention has an improved structure capable of fixing the steel wire of a prestressed wale at a location spaced apart from one end of the wale during pit excavation work for constructing an underground structure. The fixing apparatus prevents a sharp angle from being formed in the steel wire, and instead allows the steel wire to extend in the form of an arc shape, thus securing sufficient moment. The fixing apparatus provides strong reinforcement of parts to which high compressive force and high tensile force are applied. In other embodiment, the present invention has an improved structure capable of supporting a bracing beam and fixing and tensioning the steel wire in the bracing beam in corners during pit excavation work. At the corner, the fixing apparatus forms a triangular structure which can stably support the bracing beam and can fix and tension the steel wire at the same time, thus improving work efficiency. Further, the fixing apparatus has a simple structure, thus reducing the consumption of materials and reducing construction expenses.
Full Text Technical Field
The present invention relates, in general, to an apparatus for fixing a steel wire of a
wale and, more particularly, to an apparatus for fixing a steel wire of a wale, which has
a simple structure and can fix a steel wire of a prestressed wale such that the wire can
be securely reinforced during pit excavation work for constructing an underground
structure.
Background Art
During conventional pit excavation work for constructing an underground railway
or the basement of a building, the ground is dug in a predetermined area to a pre-
determined depth to excavate a pit, and a desired number of vertical piles are installed
in the pit.
After the installation of the vertical piles in the pit, part of the pit is further dug and,
thereafter, H-beams and lining boards are installed in the pit.
After the installation of the lining boards in the pit, work for constructing the un-
derground railway or the basement of the building progresses through continuous
excavation, and the repeated installation of bracing beams accompanies the repeated
excavation.
Thus, to construct such a temporary facility, both the soil pressure and the load that
may be applied to bracing beams at every excavation step must be repeatedly
calculated, and bracing beams are installed in the pit such that the beams can ef-
fectively resist both the calculated maximum soil pressure and the calculated
maximum load.
However, the above-mentioned conventional designing and constructing technique
for making underground structures requires an excessive number of bracing beams
such that the bracing beams must be densely installed in a pit with a narrow interval of
about 2-3 meters between the beams. Such densely installed bracing beams undesirably
impede the movement of construction materials in the pit and prevent construction
vehicles from moving in the pit, thus hindering the construction work. Furthermore,
the densely installed bracing beams impede both form work and reinforcement work
during the process of constructing the underground structure, and undesirably form a
plurality of holes in the finished underground structure, thus seriously reducing the wa-
terproofing properties of the underground structure.
As a technique for forming a temporary facility without using the bracing beams
while constructing an underground structure, a construction technique for supporting

steel piles using earth anchors has been proposed. In this technique, an inclined hole is
formed in the ground behind each steel pipe, and a steel wire or a steel bar is inserted
into the inclined hole. Thereafter, the end of the steel wire or the steel bar, inserted into
the inclined hole, is fixed through a mechanical method or a chemical method using
epoxy or cement grout. The fixed steel wire or the fixed steel bar is tensioned to fix the
steel pile.
The temporary facility constructed through the above-mentioned technique using
earth anchors provides sufficient inner space therein, thereby solving the difficulties
experienced in the related art.
However, the technique using earth anchors is problematic in that, if the technique
is used in a busy city, the area influenced by the construction work may include private
land around the construction site, thus incurring the enmity of the people. Another
problem with the technique resides in that it increases construction expenses.
Korean Utility Model Registration No. 20-258949 discloses a technique for con-
structing a temporary facility using a truss system without using bracing beams that
conventionally cross the center of an excavated section. The technique may be ef-
ficiently used while executing work for constructing a shallow facility. To construct a
temporary facility using the technique, H-beams are doubly placed at a location
adjacent to the ground surface, thus forming a lattice structure. The lattice structure is
reinforced using vertical beams and raker beams, so that the lattice structure can resist
soil pressure using a double-layered upper truss.
The technique using the truss system while constructing a temporary facility for
supporting the ground was proposed in an attempt to overcome the problems ac-
companying the conventional techniques using bracing beams during pit excavation
and construction of underground structures. The technique may be efficiently used in
the case of installing a wide structure in the lower part of an excavated pit and
installing a narrow structure in the upper part of the pit.
Korean Patent No. 10-188465, Korean Utility Model Registration No. 20-247053
and Japanese Patent No. 837994 disclose techniques for reinforcing wales through pre-
stressing. Each of the techniques increases the interval between the bracing beams by
installing a wale on a previously installed wale and by tensioning a steel wire. One of
the above-mentioned techniques uses an additional wale, while the other technique
reinforces the flanges of conventional H-beams.
The above-mentioned techniques are advantageous in that the interval between the
bracing beams can be increased. However, in the technique, steel wires are rec-
tilinearly arranged, thus a negative moment is generated in the steel wires, unlike the
parabolic distribution of moment generated in a wale due to soil pressure. In other
words, the distribution of moment generated in the wale is different from the dis-

tribution of load-induced moment, so that the length of the reinforced wale is un-
desirably limited.
In the above-mentioned conventional techniques, a steel wire is fixed at the end of a
prestressed wale, so that the curved section of the steel wire cannot be extended long.
Thus, the steel wire may be angled and become weak at the angled part. Furthermore,
the arc-shaped curve of the tension moment, which varies in different locations along
the steel wire, becomes short, thus failing to realize sufficient force.
Further, the wale does not have sufficient strength at parts on which both the
compressive force and the tensile force are applied as the wale is loaded. The wale may
be structurally frail, thus being easily bent. Further, the fixed state of the steel wire
may be broken.
In the conventional techniques, bracing beams or struts are installed in an excavated
planar structure so as to fix both a braced wall and corners around the braced wall.
Furthermore, steel materials are used to withstand soil pressure at the corners, thus
wasting materials and increasing construction expenses. The steel material reduces the
space in the excavated planar structure, thus reducing work efficiency when tensioning
steel wires after fixing the steel wires of the prestressed wale.
Disclosure of Invention
Technical Problem
Accordingly, the present invention has been made keeping in mind the above
problems occurring in the related art, and an object of the present invention is to
provide an apparatus for fixing a steel wire of a wale, which has a simple structure and
can fix a steel wire of a prestressed wale such that the wire can be arranged long due to
the simple structure of the apparatus, thus enabling the wale to sufficiently resist soil
pressure and to be highly reinforced at parts thereof receiving high compressive force
and high tensile force, during pit excavation work for constructing an underground
structure.
Technical Solution
In order to accomplish the above object, in an aspect, the present invention provides
an apparatus for fixing a steel wire of a wale, comprising: a fixing body having a cross
beam shape, the fixing body being integrated at a first end thereof with an end of a
prestressed wale, with a coupling hole formed in the fixing body so as to allow an end
of the steel wire of the wale to pass through the coupling hole; and a head block
provided on a second end of the fixing body and fixing the end of the steel wire of the
wale.
In another aspect, the present invention provides an apparatus for fixing steel wires
of a wale, comprising: a cross beam integrated with a prestressed wale; a compression

beam mounted at an incline to one end of the cross beam, with at least one corner
bracing beam mounted at an incline to the compression beam; a raker beam installed at
an incline to connect ends of the cross beam and the compression beam to each other;
first and second head blocks provided inside a triangle formed by the compression
beam, the raker beam and the cross beam such that the first and second head blocks are
spaced apart from each other and separately fix and tension steel wires going into the
triangle.
Advantageous Effects
The fixing apparatus according to an embodiment of the present invention has an
improved structure capable of fixing the steel wire of a prestressed wale at a location
spaced apart from one end of the wale during pit excavation work for constructing an
underground structure. The fixing apparatus prevents a sharp angle from being formed
in the steel wire, and instead allows the steel wire to extend in the form of an arc shape,
thus securing sufficient moment. Furthermore, the fixing apparatus provides strong re-
inforcement of parts to which high compressive force and high tensile force are
applied.
The fixing apparatus according to another embodiment of the present invention has
an improved structure capable of supporting a bracing beam and fixing and tensioning
a steel wire in the bracing beam at a corner during pit excavation work for constructing
an underground structure. At the corner, the fixing apparatus forms a triangular
structure which can stably support the bracing beam and can fix and tension the steel
wire at the same time, thus improving work efficiency when executing the pit
excavation work. Further, the fixing apparatus has a simple structure, thus reducing the
consumption of materials and reducing construction expenses. Further, to prevent the
dense arrangement of bracing beams at corners and prevent a reduction in space, the
fixing apparatus withstands soil pressure using the tensile force of the steel wire, thus
enlarging the work space and improving the efficiency of use of space.
Brief Description of the Drawings
FIG. 1 is a plane view illustrating an apparatus for fixing a steel wire of a wale
according to the first embodiment of the present invention;
FIG. 2 is a plane sectional view illustrating an important part of the present
invention;
FIG. 3 is a front view illustrating a state in which a wire support is used in the
fixing apparatus of the present invention;
FIG. 4 and FIG. 5 are front views illustrating stoppers having different shapes used
in the fixing apparatus, according to different embodiments of the present invention;
FIG. 6 is a plane view illustrating an apparatus for fixing a steel wire of a wale

according to the second embodiment of the present invention;
FIG. 7 is an enlarged plane view illustrating the portion "A" of FIG. 6;
FIG. 8 is a plane sectional view illustrating an important part of FIG. 7;
FIG. 9 is a plane view illustrating a state in which a wire guide member is used in
the fixing apparatus of FIG. 8; and
FIG. 10 is a view illustrating the operation of a lifting jack used in the fixing
apparatus of FIG. 8.
Best Mode for Carrying Out the Invention
Herein below, preferred embodiments of the present invention will be described in
detail with reference to the accompanying drawings.
[Embodiment 1]
With reference to FIG. 1 through FIG. 3, the apparatus for fixing a steel wire of a
wale according to the first embodiment of the present invention comprises a
prestressed wale 20 which is integrally formed in front of a braced wall 10 and has a
tensile force for tensioning a steel wire 22, a fixing body 200 bolted at a first end
thereof to an end of the wale 20 and having a coupling hole 202 for allowing the steel
wire 22 to pass through the coupling hole 202, a head block 400 provided on a second
end of the fixing body 200 and fixing the end of the steel wire 22, which has been
inserted into the head block 400, and a wire support 300 which protrudes from the
front surface of the fixing body 200 and supports the steel wire 22 at an incline.
Described in detail, the fixing body 200 is constructed in the form of a beam which
is integrated with and extends from the end of the wale 20, and preferably uses a con-
ventional H-beam.
When an H-beam is used as the fixing body 200, it is necessary to reinforce the
flange of the beam having the coupling hole 202, so that a reinforcing plate 206 is
mounted to the inner surface of the flange through welding or bolting.
Further, to secure reinforcement against shear stress generated in the fixing body
200 during the process of fixing the steel wire 22, a stopper 250 protrudes from the
front surface of the fixing body 200.
The stopper 250 may be configured in any of various shapes that are capable of
providing reinforcement against shear force. For example, the stopper 250 may be
configured as a horizontal structure which is parallel to the fixing body 200 and
provides a wide reinforcing surface on the front surface of the fixing body 200.
Further, to secure reinforcement on the inner surface of the fixing body 200, at least
one stiffener 260 is integrally provided on the inner surface through welding. The first
end of the fixing body 200, which is combined with the end of the wale 20, is provided
with an end plate 270 through welding, so that the fixing body 200 can be efficiently

combined with the wale 20.
Further, a guide plate 220 having a predetermined curvature is integrated on the
inner surface of the fixing body 200, and guides the insertion of the steel wire 22 into
the fixing body 200.
The wire support 300 may be configured as a single body which is mounted at a
first end thereof to the front surface of the fixing body 200 using a bolt, and is rounded
at a second end thereof such that the second end can support the steel wire 22 and be in
contact with the steel wire 22. Alternately, the wire support 300 may be configured as
a plurality of bodies which comprise a first body integrated with the fixing body 200
and a second body for supporting the steel wire 22.
More preferably, the second end of the wire support 300 is configured such that the
wire contact part of the second end is divided into several parts to form a slit end
capable of supporting a plurality of steel wires 22 while preventing the steel wires 22
from becoming tangled or twisted.
A box-shaped protective cap 450 having an open end is preferably provided in the
fixing apparatus. The protective cap 450 is combined with the second end of the fixing
body 200 and covers both the head block 400 and the fixed steel wire 22. Thus, the
protective cap 450 protects the wire fixing head block 400 from external shocks.
The fixing apparatus having the above-mentioned construction according to the first
embodiment of the present invention will be operated as follows.
In the fixing apparatus according to the first embodiment of the present invention,
the first end of the fixing body 200 is combined with the end of the wale 20, such that
the fixing body 200 extends in a horizontal direction from the end of the wale 20.
Thus, the fixing apparatus can fix the end of the steel wire 22 of the prestressed wale
20 to the fixing body 200 instead of the end of the wale 20, so that the fixed steel wire
22 can maintain an arc-shaped curve.
Thus, the fixing apparatus prevents a sharp angle from being formed in the steel
wire 22 and increases the length of the steel wire 22, thereby increasing the prestressed
moment of the steel wire 22.
After the fixing body 200 has been combined with the end of the wale 20, the steel
wire 22 is guided to and passes over the rounded second end of the wire support 300.
Thereafter, the steel wire 22, guided by the wire support 300, enters the fixing body
200 through the coupling hole and comes into contact with the guide plate 220 having
the predetermined curvature. The steel wire 22 enters the head block 400 and is
tensioned using a separate tensioning device before the steel wire 22 is fixed to the
head block 400.
Thereafter, to lock the steel wire 22 fixed to the head block 400, the second end of
the fixing body 200 is covered with the protective cap 450, so that the head block 400

can be protected from external shocks.
In the present invention, the stiffener 260, the guide plate 220 and the stopper 250
of the fixing body 200 may be integrated into a single body through welding.
However, the stiffener 260, the guide plate 220 and the stopper 250 of the fixing body
200 may be designed as a single structure when designing H-beams and integrally
formed as a single structure during a process of molding H-beams.
The steel wire 22 fixed to the head block 400 imposes tensile force both on the wale
20 and on the fixing body 200, thus enabling both the wale 20 and the fixing body 200
to sufficiently resist the soil pressure.
In other words, the present invention fixes the steel wire 22 of the wale 20 to a
location beyond the end of the wale 20, thus preventing a sharp angle from being
formed in the steel wire 22 and giving the steel wire 22 a sufficient tensile moment.
FIG. 4 and FIG. 5 show another shape (plate shape or H-beam shape) of the stopper
250 of the present invention. The drawings illustrate that, if a stopper 250 having one
of various shapes is provided on the front surface of the fixing body 200 to protrude
from the front surface, the stopper 250, regardless of the shape thereof, can secure
desired durability of the fixing body 200, and enables the fixing body 200 to resist
shear stress generated therein when fixing the steel wire 22.
[Embodiment 2]
The apparatus for fixing a steel wire of a wale according to the second embodiment
of the present invention will be described herein below with reference to FIG. 6
through FIG. 10. The fixing apparatus comprises a cross beam 610 which is connected
to an end of the wale 520 for supporting a braced wall 510. A compression beam 620 is
connected at an incline to one end of the cross beam 610, and is integrated with at least
one bracing beam 550. A raker beam 630 is connected at an incline both to one end of
the compression beam 620 and to one end of the cross beam 610, thus connecting the
beams 610 and 620 to each other. A coupling hole 632 is formed in the raker beam 630
at a location adjacent to the wale 520 and allows a steel wire 522 of the wale 520 to
enter the hole 632. First and second head blocks 710 and 720 are separately provided
in a triangle formed by the compression beam 620, the raker beam 630 and the cross
beam 610 such that the first and second head blocks 710 and 720 separately fix and
tension steel wires 522.
Described in detail, the cross beam 610, the compression beam 620 and the raker
beam 630 are connected to each other and form a triangular support structure. Each of
the cross beam 610, the compression beam 620 and the raker beam 630 may use an H-
beam having flanges and a web, with at least one stiffener 650 integrated with the inner
surface of the H-beam through welding for reinforcement.
The cross beam 610, the compression beam 620 and the raker beam 630 connect the

bracing beam 550 to the wale 520, and form a triangular support structure that stably
resists the compressive force applied both by the bracing beam 550 and by the wale
520.
The ends of both the compression beam 620 and the raker beam 630 are preferably
connected to each other at a right angle. However, it should be understood that the
compression beam 620 and the raker beam 630 can be connected to each other at an
acute angle or at an obtuse angle.
The compression beam 620 is connected to the bracing beam 550 so as to transmit
the compressive force, while the cross beam 610 is integrally connected to the wale
520. Thus, a reinforcing plate 810 is preferably provided in a corner junction between
the cross beam 610 and the compression beam 620.
Further, a preloading jack (not shown), having a cylinder actuator and transmitting
the compressive force, is preferably provided in the center of the bracing beam 550.
The triangular fixing apparatus is provided on an end of the wale 520 at each corner, so
that the fixing apparatus enables the wale to withstand the soil pressure using the
tensile force of the steel wire. The bracing beam 550 is preferably connected to the
compression beams 620 of opposite fixing apparatuses, so that the compressive force
applied by the preloading jack can be transmitted to the braced wall.
Further, an end plate 614 is preferably combined through welding with the first end
of the cross beam 610 that is connected to the end of the wale 520, so that the cross
beam 610 can be more securely connected to the wale 520.
A guide plate 900 having a predetermined curvature is integrated with the inner
surface of the raker beam 630 and guides the entrance of the steel wire 522 into the
raker beam 630. The guide plate 900 has a structure that is slid along the inner surface
of the raker beam 630 by a lifting jack 950.
The lifting jack 950 preferably incorporates a screw jack. When a screw jack is used
as the lifting jack 950, the first end of the lifting jack 950 is integrated with one end of
the guide plate 900, thus enabling the guide plate 900 to be operated in conjunction
with the lifting jack 950. The second end of the lifting jack 950 is mounted to a
mounting plate 955 using a nut unit 952 such that the second end is moved via the
mounting plate during rotation.
Thus, the lifting jack 950 controls the upper and lower widths of the guide plate 900
and finely controls the angle of the steel wire 522.
The function of the first and second head blocks 710 and 720 may be designed as
follows. When the first head block 710, which is placed at an upper location, has a
fixing function, the second head block 720, which is placed at a lower location, has a
tensioning function. In that case, the first head block 710 of another fixing apparatus
provided on the opposite end of the wale 520 has a tensioning function, while the

second head block 720 has a fixing function.
More preferably, a shear key 615 extends from the lower part of the cross beam 610
such that the shear key 615 interferes with the end of the wale 520 along a horizontal
line. Because the end of the wale 520 that receives the compressive force is located
such that it faces in the direction opposite the direction from which force is transmitted
from the compression beam 620, the compressive force is offset by the force
transmitted from the compression beam 620.
To support the shear key 615, a connection member 1000 is preferably combined
with the wale 520 such that the connection member 1000 is located between the wale
520 and the fixing apparatus. The connection member 1000 is integrated with the shear
key 615 of the fixing apparatus using bolts.
The connection member 1000 is preferably provided with an upper shear key 1010
which protrudes forwards, so that the force transmitted from the upper shear key 1010
counteracts and offsets the compressive force transmitted to the end of the cross beam
610.
Further, first and second wire guide members 715 and 725 having a pipe shape are
preferably provided inside the reinforcing plate 810 at a location between the first and
second head blocks 710 and 720 and the raker beam 630, thus separately guiding the
steel wires 522 to the first and second head blocks 710 and 720.
The fixing apparatus having the above-mentioned construction according to the
second embodiment of the present invention will be operated as follows.
During pit excavation work for constructing an underground structure, the fixing
apparatus according to the present invention has the bracing beam 550 connected
thereto at each corner and fixes and tensions the ends of the steel wires 522 using the
first and second head blocks 710 and 720.
In the above state, the ends of the steel wires 522 enter the connection member and
are guided to the first and second head blocks 710 and 720 by the first and second steel
wire guide members 715 and 725.
Thereafter, the first head block 710 fixes the ends of the steel wires 522, while the
second head block 720 tensions the ends of the steel wires 522. Then, the lifting jack
950 is operated to curve the steel wires 522 as desired, thus controlling the upper and
lower widths of the guide plate 900.
In other words, when the second end of the lifting jack 950, which is bolted to the
mounting plate, is rotated in one direction, the guide plate 900 moves upwards or
downwards according to the direction in which the lifting jack 950 is rotated, so that
the upper and lower widths of the guide plate 900 can be controlled and change the
curve of the steel wires 522 which enter the guide plate 900.
In the fixing apparatus, the bracing beams 550 placed at corners are connected to

the compression beam 620 having the triangular support structure. Further, the steel
wires 522 of the wale 520 are tensioned and fixed by the first and second head blocks
710 and 720. Thus, the fixing apparatus executes the function of connecting the
bracing beams 550 and the function of tensioning and fixing the steel wire 522 at one
place.
Thus, each corner of a pit has a simple structure and provides an empty space other
than the area having the fixing apparatus, thus enlarging the work space. Further, the
present invention can variably manage the work of fixing and tensioning the steel
wires 522 of a wale and the work of tensioning and fixing the steel wires 522 placed at
the opposite side of the wale 520.
At each corner of the pit, the bracing beam 550 is fixed and connected to the
compression beam 620, so that the compressive force transmitted from the bracing
beam 550 passes through the compression beam 620 and is transmitted both to the
raker beam 630 and to the cross beam 610. Thereafter, the compressive force is
transmitted to the wale 520 through the connection member 1000, thus the wale 520
can efficiently withstand soil pressure.
In the above state, the shear key 615 of the fixing apparatus and the upper shear key
1010 of the connection member 1000 are connected to the end of the connection
member 1000 and to the end of the cross beam 610, respectively, and thus they
interfere with each other. Thus, the direction of the compressive force transmitted from
the bracing beam 550 is opposite the direction of the soil pressure transmitted from the
wale 520, so that the compressive force offsets the soil pressure.
The fixing apparatus according to the second embodiment of the present invention
is preferably used with the connection member in corners during pit excavation work.
However, it should be understood that the fixing apparatus may be used without the
connection member.

We Claim:-
[1] An apparatus for fixing a steel wire of a wale, comprising: a fixing body having a
cross beam shape, the fixing body being integrated at a first end thereof with an
end of a prestressed wale, with a coupling hole formed in the fixing body so as to
allow an end of the steel wire of the wale to pass through the coupling hole; and
a head block provided on a second end of the fixing body and fixing the end of
the steel wire of the wale.
[2] The apparatus for fixing the steel wire of the wale according to claim 1, further
comprising: a stopper protruding from a front surface of the fixing body so as to
increase a shear force of the fixing body.
[3] The apparatus for fixing the steel wire of the wale according to claim 1, further
comprising: a guide plate, having a predetermined curvature and integrated on an
inner surface of the fixing body, so as to guide insertion of the steel wire into the
fixing body.
[4] The apparatus for fixing the steel wire of the wale according to claim 1, further
comprising: a protective cap combined with the second end of the fixing body
and covering the head block.
[5] The apparatus for fixing the steel wire of the wale according to claim 1, further
comprising: at least one stiffener integrally provided on the inner surface of the
fixing body.
[6] The apparatus for fixing the steel wire of the wale according to claim 1, further
comprising: a wire support protruding from a front surface of the fixing body and
guiding the steel wire at an incline.
[7] An apparatus for fixing steel wires of a wale, comprising: a cross beam
integrated with a prestressed wale; a compression beam mounted at an incline to
one end of the cross beam, with at least one corner bracing beam mounted at an
incline to the compression beam; a raker beam installed at an incline to connect
ends of the cross beam and the compression beam to each other; first and second
head blocks provided inside a triangle formed by the compression beam, the
raker beam and the cross beam such that the first and second head blocks are
spaced apart from each other and separately fix and tension steel wires going into
the triangle.
[8] The apparatus for fixing the steel wires of the wale according to claim 7, wherein
each of the cross beam, the compression beam and the raker beam uses an H-
beam having a flange and a web, with at least one stiffener integrally combined
with the beam to increase compressive force of the web.
[9] The apparatus for fixing the steel wires of the wale according to claim 7, further

comprising: a guide plate having a predetermined curvature provided inside the
raker beam so as to guide insertion of the steel wires into the raker beam.
[10] The apparatus for fixing the steel wires of the wale according to claim 7, further
comprising: a reinforcing plate integrated both with an inner surface of the cross
beam and with an inner surface of the compression beam.
[11] The apparatus for fixing the steel wires of the wale according to claim 7, further
comprising: first and second wire guide members having a pipe shape provided
at a location between the first and second head blocks and the raker beam, thus
separately guiding the steel wires to the first and second head blocks.
[12] The apparatus for fixing the steel wires of the wale according to claim 9, further
comprising: a lifting jack integrally combined with the guide plate such that the
lifting jack is movable in the raker beam.
[13] The apparatus for fixing the steel wires of the wale according to claim 7, further
comprising: a shear key extending from a lower part of the cross beam such that
the shear key interferes with an end of the wale on a horizontal line.
[14] The apparatus for fixing the steel wires of the wale according to claim 13, further
comprising: a connection member provided between the cross beam and the wale
and integrally combined with the wale so as to support the shear key, with an
upper shear key protruding forwards from an end of the connection member, so
that the upper shear key interferes with the end of the cross beam in a direction in
which compressive force is transmitted.

The present invention provides an apparatus for fixing a steel wire of a wale. In an
embodiment, the present invention has an improved structure capable of fixing the
steel wire of a prestressed wale at a location spaced apart from one end of the wale
during pit excavation work for constructing an underground structure. The fixing
apparatus prevents a sharp angle from being formed in the steel wire, and instead
allows the steel wire to extend in the form of an arc shape, thus securing sufficient
moment. The fixing apparatus provides strong reinforcement of parts to which high
compressive force and high tensile force are applied. In other embodiment, the
present invention has an improved structure capable of supporting a bracing beam
and fixing and tensioning the steel wire in the bracing beam in corners during pit
excavation work. At the corner, the fixing apparatus forms a triangular structure
which can stably support the bracing beam and can fix and tension the steel wire at
the same time, thus improving work efficiency. Further, the fixing apparatus has a
simple structure, thus reducing the consumption of materials and reducing
construction expenses.

Documents:

http://ipindiaonline.gov.in/patentsearch/GrantedSearch/viewdoc.aspx?id=xOTlaf5Z4lo3ma58v8bTSg==&loc=wDBSZCsAt7zoiVrqcFJsRw==


Patent Number 269576
Indian Patent Application Number 2388/KOLNP/2008
PG Journal Number 44/2015
Publication Date 30-Oct-2015
Grant Date 28-Oct-2015
Date of Filing 13-Jun-2008
Name of Patentee SUPPORTEC CO., LTD.
Applicant Address 5F KOIN BLDG., 229-9 POI-DONG, GANGNAM-GU, SEOUL 135-964 (KR)
Inventors:
# Inventor's Name Inventor's Address
1 BAIK, SEUNG DEOK 303-605 HYUNDAI RIVERVILL APT., PUNGNAP-DONG, SONGPA-GU, SEOUL 138-919 (KR)
PCT International Classification Number E02D 17/04
PCT International Application Number PCT/KR2006/004800
PCT International Filing date 2006-11-15
PCT Conventions:
# PCT Application Number Date of Convention Priority Country
1 10-2005-0109709 2005-11-16 Republic of Korea
2 10-2005-0109708 2005-11-16 Republic of Korea