KR102052798B1 - Apparatus for re-tensioning of strand wire - Google Patents

Abstract

The present invention relates to a re-tensioning device for a stranded ship, wherein the inner circumferential surface of the casing is extended to a shape for accommodating an integral wedge unit and at the same time to accommodate a split wedge unit-ring, while surrounding the outer circumferential surface of the strand wire holder Multiple split wedge unit-rings with protruding type rings that fit into ring grooves on the outer circumferential surface or a plurality of integral wedge units that surround and grip the outer circumferential surface of the strand holder are arranged according to the type and size of the strand holder. It is possible to obtain the effect of having a re-tensioning device for strands, and thus, a single re-tensioning device can be used for re-tensioning of stranded wires to perform re-tensioning of a stranded wire regardless of the type and size of the strand holder. It can be usefully used.

Description

Re-tensioning device of stranded wire {APPARATUS FOR RE-TENSIONING OF STRAND WIRE}

The present invention relates to a re-tensioning device for a stranded wire that can re-tension the stranded wire as needed, such as when the tensile force is reduced in the ground anchor constructed for stabilization of the ground, thereby failing to function as a ground anchor. In more detail, a split wedge unit-ring or an integrated wedge unit may be provided in one casing according to the type and size of the strand holder to obtain an effect of having a plurality of sets of strand strand re-tensioning devices. Therefore, the present invention relates to a re-tensioning device for a stranded ship capable of performing re-tensioning of a stranded wire regardless of the type and size of a stranded steel holder with a single stranded re-tensioning device.

In general, the ground anchor is intended to stabilize and reinforce the ground by constructing it from the ground to the ground surface in order to prevent the collapse of the slope or retaining wall of the ground during civil engineering or building construction.

The ground anchor is preferably maintained at the initial state as the tensile force is given by stretching the strands, but as time passes, the ground force naturally decreases due to ground sedimentation, loss of soil, and extension of the strands. Since the lowering of the tensile force of the strands does not function as a ground anchor, it is required to re-tension the strands of the ground anchors.

The re-tensioning of the ground anchor is supported by the strand holder so that the ends of the strands extending outwards are gripped through each wedge unit, which means that the strand strand supported by the strand holder is again tensioned. In this case, the strand re-tension has been disclosed in a number of devices or methods implemented using a re-tensioning device having a special structure, but from among them, one re-tensioning device determined to be related to the present invention is extracted. Briefly explain.

Republic of Korea Utility Model Registration No. 20-0481040 (hereinafter referred to as "Document 1") is the end of the stranded ship is held by the stranded ship holder and the first wedge unit, the outer ring surface of the stranded ship holder is a second wedge unit crimping ring And a fixing unit which is gripped by the first casing and the second casing is fastened to the first casing, and the tension bar which is fastened to one side of the second casing is tensioned with a tension cylinder which is one of the tensioning means. It was.

However, as described above, the tensile force test and imparting device of Document 1 has various types such as 108 mm, 109 mm, 113 mm and 138 mm in outer diameter of the strand wire holder, and has a thickness of 50 to 60 mm, thus removing the entire outer peripheral surface of the strand wire holder. The crimping ring in the casing must be gripped in a wrapped state so that the crimping ring can be securely chucked, so that at least the crimping ring having the inner diameter of the crimping ring has the same size as the outer diameter of the stranding wire holder. There was a need to provide several sets.

As mentioned above, there was an increase in manufacturing cost by providing re-tensioning apparatus in several sets and re-tensioning of the stranded vessel was possible only when several sets were provided at all times.

(Document 1) KR 20-0481040 Y1 (registered July 29, 2016)

In order to solve the conventional problems and closed ends as described above, the inner circumferential surface of the casing is expanded to accommodate the integral wedge unit and at the same time accommodate the split wedge unit-ring, A plurality of split wedge unit-rings having a protruding type ring formed to be hooked into a ring groove of the outer main surface while enclosing the outer main surface, or a plurality of integral wedge units that surround and grip the outer main surface of the strand wire holder according to the type and size of the strand wire holder. By equipping it together, it is possible to obtain the effect of having several sets of strand re-tensioning devices, so that one strand re-tensioning device can perform the re-tensioning work of the strands regardless of the type and size of the strand holder. The object is to provide a retension device for a strand.

In addition, the present invention is the upper end of the wedge unit is fastened to the washer member is provided as an integral wedge unit is provided between the split wedge constituting the wedge unit is provided with an elastic member and the split wedge is radially flowable between the strand wire holder and the casing It is an object of the present invention to provide a re-tensioning device for a stranded wire that can be easily inserted as well as to reliably and stably grip the outer peripheral surface of the stranded steel holder.

Re-tensioning device of the stranded ship according to the present invention for solving the problems as described above is a stranded ship holder buried in the ground and extended to the ground end portion of the stranded wire is supported by the first wedge unit; A split wedge unit-ring and an integral wedge unit installed on an outer circumferential surface of the strand wire holder and adapted to be adapted to a size or shape of the outer circumferential surface of the strand wire holder; A casing having a plurality of cap-shaped cross-sections which wrap up the outer peripheral surface of the split wedge unit-ring or integral wedge unit and cover the upper portion of the strand wire holder; An outer retaining ring that covers the outer circumferential surface of the casing to prevent the casing from expanding radially; And a tension bar connected to one end of the casing to pull the strand wire holder by the tension cylinder, which is one of the tension means.

In the re-tensioning device for a stranded ship according to the present invention, the casing is formed with a cone-shaped main surface of the upper and lower narrow sides to accommodate an integral wedge unit for holding the stranded line holder on at least an inner circumferential surface of the stranded line holder. The split wedge unit ring-groove is formed on the mold main surface by which the split wedge unit ring is coupled.

In the re-tensioning device for a stranded ship according to the present invention, the split wedge unit-ring has an outer circumferential surface coupled to a split wedge unit ring-groove of a casing, and an inner circumferential surface surrounds an outer circumferential surface of the strand wire holder. It is characterized in that the protruding ring is fitted to the ring groove.

In the re-tensioning device for a stranded wire according to the present invention, the unitary wedge unit is composed of a plurality of split wedges forming a circle and a washer member fastened to an upper end of the split wedge, and the split wedge has an outer peripheral surface thereof. It is coupled to the cone-shaped main surface and the inner main surface is provided in the truncated cone shape of the wedge end surface surrounding the outer main surface of the strand wire holder, the upper end of the split wedge is fastened to the washer member through a plurality of first fastening members, the washer member It is characterized in that the split wedge is provided with a long hole so as to radially flow and the elastic member is interposed therebetween so that the split wedge is extended to the outside.

In the re-tensioning device of the stranded wire according to the present invention, the outer fixing ring may be provided with a plurality of second fastening members to be fixed to the outer peripheral surface of the casing, to the base of the cap-shaped cross section covering the casing May also be provided.

According to the present invention, the inner circumferential surface of the casing is expanded and provided in a shape for accommodating the integral wedge unit and at the same time to accommodate the split wedge unit-ring, and is fitted into the ring groove of the outer circumferential surface while surrounding the outer circumferential surface of the strand ship holder. By providing a split wedge unit-ring with a protruding type ring or an integral wedge unit that wraps and grips the outer circumferential surface of the strand holder, according to the type and size of the strand holder, multiple sets of strand wire re-tensioning devices can be obtained. As a result, there is a useful effect that the re-tensioning operation of the strand can be performed with one strand re-tensioning device regardless of the type and size of the strand holder.

In addition, the present invention is provided with an integral wedge unit, the upper end of the wedge unit is fastened to the washer member, but an elastic member is provided between the split wedges constituting the wedge unit and the split wedge is radially flowable to be installed between the strand wire holder and the casing. Easily inserted, of course, the outer peripheral surface of the strand holder has a useful advantage that can be reliably and stably gripped.

1 is an exploded perspective view showing a re-tensioning device of a strand according to a preferred embodiment of the present invention.
2 is a cross-sectional view showing an embodiment in which a split wedge unit-ring is adopted in a re-tensioning device of a strand according to the present invention.
3 is a partially exploded perspective view showing in detail the casing and the split wedge unit ring in FIG.
Figure 4 is a cross-sectional view showing another embodiment of the state adopting the integral wedge unit in the re-tensioning device of the strand according to the present invention.
5 is an exploded perspective view showing some details of the casing and the integral wedge unit in FIG.
Figure 6 is an exploded perspective view showing an integrated wedge unit applied to the present invention.
7 is a cross-sectional view of a re-tension apparatus of a strand according to another embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings in accordance with a preferred embodiment of the present invention will be described in detail. For reference, the size of the components, the thickness of the line and the like shown in the drawings referred to in describing the present invention may be somewhat exaggerated for ease of understanding. In addition, the terms used in the description of the present invention are defined only in consideration of the functions in the present invention and may vary according to a user, an operator's intention, custom, and the like. Therefore, the definition of terms should be based on the contents throughout the present specification.

1 to 6 are diagrams for explaining the re-tensioning device of the strand according to a preferred embodiment of the present invention.

As shown in the figure, the end portion of the strand wire 11, the strand wire holder 10 is held and supported by the first wedge unit 13; Split wedge unit-ring 20 and integral wedge unit 30, which are installed on the outer circumferential surface of the strand wire holder 10 and are selectively divided into the size of the strand wire holder 10 or the shape of the outer circumferential surface thereof. ); A casing 40 having a plurality of cap-shaped cross-sections which wrap the outer peripheral surface of the split wedge unit ring 20 or the integral wedge unit 30 and cover the upper portion of the strand wire holder 10; An outer fixing ring 50 which is covered on an outer circumferential surface of the casing 40 to prevent the casing 40 from expanding radially; And a tension bar 60 connected to one end of the casing 40 to pull the strand wire holder 10 by a tension cylinder (not shown), which is one of the tension means.

The strand 11 is embedded in the ground but one end is extended to protrude to the ground, the end portion of the strand 11 is each of the first wedge so that the strand holder 10 is supported by the pressure plate 15 It is gripped by the unit 13. The first wedge unit 13 is seated in the wedge unit hole 10a of the strand wire holder 10 to maintain the strand wire 11 in a tensioned state.

The strand wire holder 10 is provided in four kinds of disk shapes having a thickness of 45 mm to 55 mm and a diameter of 108 mm, 109 mm, 113 mm, and 138 mm, and the strand wire 11 penetrates the strand wire 11. Several wedge unit holes 10a are provided for mounting the first wedge unit 13 to be gripped, and a ring-groove 10b is provided in the middle portion, which is an outer circumferential surface of the strand holder 10.

The split wedge unit ring 20 is suitable for holding the strand wire holder 10 having the ring groove 10b formed on the outer circumferential surface, and is provided in plural numbers having a size suitable for the kind of the strand wire holder 10 and the strand wire holder. What is necessary is just to select and use the division wedge unit ring 20 suitable for the size of (10). The split wedge unit ring 20 is provided in a shape that is coupled to the split wedge unit ring-groove 42 of the casing 40, the outer circumferential surface is described later, the inner circumferential surface is the outer peripheral surface of the strand wire holder 10 It is a shape provided with the protruding-type ring 22 which is caught and caught in the ring groove 10b of the outer peripheral surface thereof while wrapping.

The one-piece wedge unit 30 is provided to hold the strand wire holder 10 having no ring groove on the outer peripheral surface, and is provided in plural pieces having a size suitable for the kind of the strand wire holder 10, and the constructed strand wire holder ( What is necessary is just to select and use the integrated wedge unit 30 suitable for the size of 10).

The integral wedge unit 30 is composed of a plurality of split wedges 31 forming a circle and a washer member 32 fastened to the upper end of the split wedge 31, the split wedge 31 is the outer side The main surface is coupled to the cone-shaped main surface 41 which will be described later and the inner main surface is provided in the shape of a truncated cone of the wedge end surface surrounding the outer main surface of the strand wire holder 10, the upper end of the split wedges (31) 32 is fastened through a plurality of first fastening members 33, and the washer member 32 is provided with a long hole 34 so that the split wedges 31 can flow radially, and the split wedges 31 extend outward. The elastic member 35 is interposed between them so that it may be.

The long hole 34 and the elastic member 35 is provided because the split wedge 31 forming the integral wedge unit 30 when the integral wedge unit 30 is installed to surround the outer circumferential surface of the strand holder 10. This is because it is easy to insert and install like covering the upper and outer circumferential surface of the strand wire holder 10 only to be kept in an extended state.

In addition, the inner main surface excluding the protruding ring 22 of the split wedge unit ring 20, as well as the inner main surface of the split wedges 31 of the integrated wedge unit 30, surround the outer main surface of the strand wire holder 10. It is preferable that the tooth-shaped unevenness is provided so that it can be gripped reliably.

The casing 40 is divided into a plurality of cap-shaped cross-section to form a cylindrical shape, the upper inner surface is formed with a head receiving groove 43 is caught the head 61 of the lower end of the tension bar 60, The lower inner surface of the head receiving groove 43, that is, the lower inner surface of the casing 40, which is an outer position of the strand holder 10, is adapted to receive the split wedges 31, which are integral wedge units 30, which grip the strand holder 10. The cone-shaped main surface 41 of the optical channel is formed, and the split wedge unit ring-groove 42 is formed on the cone-shaped main surface 41 to which the split wedge unit ring 20 is seated.

If the outer fixing ring 50 is a ring-shaped to prevent the casing 40 is extended radially, it is sufficient, but a plurality of second fastening members 52 that can be fixed to the outer peripheral surface of the casing 40 may be provided. have.

The process of re-tensioning the strand using the re-tensioning device of the strand according to the present invention configured as described above will be described in detail.

First, a ground anchor should be constructed from the slope of the ground toward the ground. The construction process of the ground anchor is embedded in the ground with the anchor anchor 11 is anchored to the ground anchors, one end portion is projected to extend to the ground, and the pressure plate on the inclined surface of the ground so that the end portion of the strand 11 is penetrated (15) and the stranded wire holder 10 is installed, but pulled the stranded wire (11) is installed so that the tension state is maintained. At this time, the end portion of the strand 11 is gripped by the first wedge unit 13 and the first wedge unit 13 is installed to be seated in the wedge unit hole (10a) of the strand holder (10).

 After the construction of the ground anchor is completed as described above, when the tensile force applied to the strand 11 is lowered and re-tensioning is required, the re-tensioning device is connected to the strand holder 10 or the strand 11. In this case, the strand wire holder 10 has a ring groove 10b is usually formed on the outer peripheral surface and there is no ring groove, most of the diameter of the outer peripheral surface is constructed of 108mm, 109mm, 113mm and 138mm. .

Re-tensioning device for re-tensioning by selecting one of the split wedge unit-ring 20 and the integral wedge unit 30 suitable for the diameter of the stranded steel holder 10 and the presence or absence of the ring groove constructed as mentioned above. Just install

For example, when the ring groove 10b is formed on the outer circumferential surface of the strand wire holder 10 and the diameter of the outer circumferential surface is 113 mm, the split wedge unit ring on the outer circumferential surface of the strand wire holder 10 as shown in FIG. 20 is installed, but the protruding ring 22 of the split wedge unit-ring 20 is inserted into the ring groove 10b of the strand holder 10 so as to enclose the outer peripheral surface of the strand holder 10 at the same time. Install.

Thus, after installing the split wedge unit ring 20, the stranded wire holder 10 is inserted into the split wedge unit ring-groove 42, which is the lower inner surface of the casing 40, so that the outer peripheral surface of the split wedge unit ring 20 is inserted. And the casing 40 in a shape surrounding the split wedge unit-ring 20. At this time, the head receiving groove 43 of the casing 40 should be installed so that the head 61 of the tension bar 60 is also inserted.

In this state, to prevent the casing 40 from spreading radially, the outer fixing ring 50 is placed on the lower outer side of the casing 40 and the second fastening member 52 of the outer fixing ring 50 is rotated and fixed. .

Thereafter, a tension cylinder (not shown), which is one of the tension means, is installed at the end of the tension bar 60, and the tension cylinder is operated to pull and stretch the strand wires 11 together with the strand wire holder 10, Re-tensioning of the strand is completed by separating and removing the tension cylinder while the strand holder 11 is fixed to maintain the tensile force applied to the strands 11.

In addition, when there is no ring groove 10b on the outer circumferential surface of the strand wire holder 10 and the diameter of the outer circumferential surface is 113 mm, the integral wedge unit 30 is formed on the upper surface and the outer circumferential surface of the strand wire holder 10 as shown in FIG. At the same time, the wedge member 31 of the unitary wedge unit 30 wraps the outer circumferential surface of the strand holder 10 and is installed so that the washer member 32 covers the upper surface of the strand holder 10. At this time, since the elastic member 35 is installed between the split wedges 31 of the integrated wedge unit 30, and the long hole 34 is formed in the washer member 32, the split wedge 31 of the integrated wedge unit 30. ) Is a radially expanded bar bar wedge 31 is inserted simply and easily without jamming the outer peripheral surface of the strand holder (10).

After installing the integrated wedge unit 30 as described above, the strand wire holder 10 is positioned so that the outer main surface of the split wedge 31 of the integrated wedge unit 30 is positioned on the cone-shaped main surface 41 which is the lower inner surface of the casing 40. And the casing 40 is installed in a shape surrounding the integral wedge unit 30.

When the casing 40 is installed in this way, the split wedges 31 of the unitary wedge unit 30 are lifted by the cone-shaped main surface 41 to grip the outer peripheral surface of the strand holder 10. At this time, the head receiving groove 43 of the casing 40 should be installed so that the head 61 of the tension bar 60 is also inserted.

In this state, to prevent the casing 40 from spreading radially, the outer fixing ring 50 is placed on the lower outer side of the casing 40 and the second fastening member 52 of the outer fixing ring 50 is rotated and fixed. .

Thereafter, a tension cylinder (not shown), which is one of the tension means, is installed at the end of the tension bar 60, and the tension cylinder is operated to pull and stretch the strand wires 11 together with the strand wire holder 10, The re-tensioning operation of the stranded wire is completed by separating and removing the tension cylinder while the stranded wire holder 10 is fixed to maintain the tensile force applied to the stranded wires 11.

7 is a view showing a state in which the outer fixing ring replaced the base in the re-tension device of the strand according to the present invention. Here, a plurality of second fastening members 52 capable of fixing the outer fixing ring 50 to the outer circumferential surface of the casing 40 are provided, and the base 50A of the cap-shaped cross section covering the casing 40 is provided. Except that provided in the same manner as the configuration of the other embodiments.

According to the re-tensioning device of the stranded wire according to another embodiment as described above, the integral wedge unit 30 is installed in the stranded wire holder 10 in the same order as in the embodiment of Figure 4, and then the tension bar 60 The head 61 of the tension bar 60 is installed in the head accommodation groove 43 of the casing 40 in a state where the head 61 is preassembled to be positioned inside the pedestal 50A, and the pedestal 50A is provided. The second fastening member 52 may be rotated and fixed to lower the casing 40 to the lower end of the casing 40.

In addition to the basic effect that the integral wedge unit 30 grips the outer circumferential surface of the strand holder 10 by the cone-shaped main surface 41 of the casing 40, the pedestal 50A of the casing 40 Since the upper and outer circumferential surfaces are provided in a state of being firmly wrapped, the expansion of the more stable casing 40 can be prevented.

As described above, the present invention has been described with reference to specific embodiments, but the present invention is not limited to the embodiments disclosed in the description of the present invention and the accompanying drawings, and variously modified by those skilled in the art without departing from the spirit of the present invention. It can be modified.

10: strand holder 10a: wedge unit hole
10b: ring-groove 11: strand
13: first wedge unit 20: split wedge unit ring
22: protruding ring 30: integral wedge unit
31: split wedge 32: washer member
33: first fastening member 34: long hole
35: elastic member 40: casing
41: cone-shaped main surface 42: split wedge unit ring-groove
43: head receiving groove 50: outer fixing ring
52: second fastening member 60: tension bar
61: head

Claims (4)

A strand ship holder, which is buried in the ground and extends to the ground, at which an end portion of the strand ship is gripped and supported by the first wedge unit;
A split wedge unit-ring and an integral wedge unit installed on an outer circumferential surface of the strand wire holder and adapted to be adapted to a size or shape of the outer circumferential surface of the strand wire holder;
A casing having a plurality of cap-shaped cross-sections which wrap up the outer peripheral surface of the split wedge unit-ring or integral wedge unit and cover the upper portion of the strand wire holder;
An outer retaining ring that covers the outer circumferential surface of the casing to prevent the casing from expanding radially; And
A tension bar connected to one end of the casing to pull the strand holder by a tension cylinder, which is one of the tension means,
The casing is a split wedge in which a cone wedge unit of a light beam is formed to accommodate an integral wedge unit for holding a strand ship holder on at least an inner circumferential surface of the strand ship holder, and a split wedge unit ring is coupled and seated on the cone-shaped main plane. Re-tensioning device of a stranded wire, characterized in that a unit ring groove is formed. delete The method according to claim 1,
The split wedge unit-ring is provided with a protruding ring having an outer circumferential surface coupled to the split wedge unit ring-groove of the casing and an inner circumferential surface surrounding the outer circumferential surface of the strand ship holder to be fitted into a ring groove of the outer circumferential surface thereof. Re-tensioning device for strands. The method according to claim 1,
The unitary wedge unit includes a plurality of split wedges forming a circle and a washer member fastened to an upper end of the split wedge, wherein the split wedge is mounted on the outer circumference of the cone wedge and the inner circumference is a strand holder. It is provided in a truncated cone shape of the wedge section surrounding the outer circumferential surface of the, and the upper end of the split wedge is fastened to the washer member through a plurality of first fastening members, but the long hole is provided in the washer member to enable split wedges to flow radially. Re-tensioning device of the stranded wire, characterized in that the elastic member is interposed therebetween so that the split wedges extend outward.

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