KR20160057747A

KR20160057747A - Prestressed wale for temporary facility

Info

Publication number: KR20160057747A
Application number: KR1020140158742A
Authority: KR
Inventors: 노우현; 노경범
Original assignee: 우경기술주식회사
Priority date: 2014-11-14
Filing date: 2014-11-14
Publication date: 2016-05-24

Abstract

The present invention focuses on improving economic efficiency and construction efficiency, thereby making it possible to economically construct the steel material by reducing the overall amount of steel material, and further enhancing the safety of the belt by increasing the length of the belt, The present invention provides a prestressed wale for a temporary earth retaining structure capable of introducing an additional reaction force for facilitating installation of a structure and shortening a construction period to increase construction efficiency.
According to an aspect of the present invention, there is provided a prestressed band for prestressing earth soil, comprising: A wrist strap installed across the vertical file; And a strut bracket for fixing and supporting the wale band, the wale band for horizontal retention comprises: a horizontal beam disposed across the wale band; A lightweight PS steel wire fixing bracket fixed to both ends of the horizontal beam; A PS steel wire support and a prestress introduction device disposed between the lightweight PS steel wire fixing brackets; A PS steel wire which is fixedly installed over the lightweight PS steel wire fixing bracket and the PS steel wire supporting pedestal; And a PS steel wire fusing part provided at both ends of the horizontal beam, and is a long span lightweight band.

Description

{Prestressed wale for temporary facility}

[0001] The present invention relates to a prestressed wale for use in an earthquake-proof construction capable of introducing an additional reaction force, and more particularly, to a prestressing wale used in an earthquake- The present invention relates to a prestressed wale for introducing an additional reaction force which introduces a prestress, introduces a third prestress by a secondary tensile PS steel, and introduces a prestress by a prestress introduction device.

In addition, the present invention improves the PS steel fixing brackets and the PS steel pedestals used in the conventional prestressed wales for earthworks, thereby making it possible to increase the amount of introduction of the prestress by the PS steel, to easily introduce additional prestress during the installation, The present invention relates to a prestressed wale for preventing the buckling displacement of the PS steel pedestal at the time of introduction so as to improve the workability, increase the safety, and improve the economy by improving the economical efficiency.

At present, there are piling method used widely in the construction field, such as brace method and PS retaining method.

The PS cladding method of this technique is a technique of introducing pre-stress into the wrist strap with PS steel and widening the support span of the strap to eliminate the braces. Since 1990, technology has been developed in Japan and the like, The prior art known as a technology that is used externally is as follows.

Japanese Unexamined Utility Model Publication No. 2-23036 (published on Feb. 15, 1990), as shown in Figs. 1 to 3, has a structure in which a band material is provided in the transverse direction on the inner side of a toe wall and the band material is supported by a strut In the method, a short strip material is reinforced by a truss-like earth retaining material with a vertical material on the inside and a PS steel between the upper part of the vertical material and the strip material. The elongated strip material is sandwiched between a strand and a strand And is reinforced by a truss-shaped earth retaining structure provided with PS steel between the upper portion of the vertical member and the joining point of the band material and the strut.

The above method is a method of introducing a prestress into a wrist band by a method of introducing a prestress into a wrist band. The PS strand is pushed upwards by a hydraulic jack at the upper end of a vertical member and a prestress is introduced into the wrist band by the reaction force. The introduction of the prestressing can push up the PS steel upwards. However, the reduction of the length of the belt is limited by the limitation of the number of installed PS steels, the upside pushing of the PS steel, There is an inevitable aspect to the reduction of the length of the belt.

As shown in Figs. 4 to 6, Japanese Unexamined Patent Application Publication No. 6-57741 (published on Mar. 1, 1994) discloses a method of connecting a head portion of an I beam inserted into a main body constituting a to- And an initial stress is introduced by fixing both ends of the wale through the arcuate shape with the vertical member interposed therebetween along the wale surface.

This type of earth wall can adjust the deformation of the out-of-plane surface freely by means of the arch shape of the arched tie material and the tensile strength of the initial stress introduced, and the displacement can be kept within the permissible range and the tension material such as unbonded PC steel wire Therefore, it is easy to install and can be easily removed after use, and since the tension member extends along the wale joint connecting the toe portions of the toe wall, it is possible to further improve the construction efficiency compared to the bracing support type .

However, after the introduction of the first prestress, additional prestress can not be introduced, and construction is somewhat troublesome.

In Japanese Unexamined Patent Publication No. Hei 7-56136 (published on June, 1955), as shown in Fig. 7 and Fig. 8, in a retaining method in which a wale is provided inside a toe wall and a corner is reinforced by a bracket, And a hydraulic jack for tensioning the PS steel in a vertical direction is installed at a central portion of the belt, the PS steel is used as a reaction force, and a reverse reaction force is applied to the belt by a hydraulic jack to reduce the earth pressure on the wrist band. Prestress is a retaining method.

In this method, by using the PS steel material installed on the wrist strap as a reaction force, a reverse reaction force is added to the central portion of the band by the hydraulic jack to reduce the bending moment and the shearing force of the band by the side pressure. Thus, the support span of the band can be widened, Thereby reducing the cost of earth retaining and foundation excavation.

In addition, it is possible to design the support span of the belt zone according to the earth pressure and the planar scale of the excavation ground, and the inner space can be secured widely.

The above method has a problem that the hydraulic jack must be kept at the top of the vertical member at the time of the introduction of the first prestress or the introduction of the additional prestress.

Accordingly, it is an object of the present invention to solve the above-mentioned problems, and it is an object of the present invention to provide a method of manufacturing a steel structure which can reduce the overall steel material quantity by economical efficiency and construction efficiency, The present invention provides a prestressed wale for the earthquake-resistant construction, which is capable of introducing additional reaction force to increase the efficiency of construction by shortening the construction period while facilitating the subsequent excavation of the ground and the installation of the structure. have.

In addition, the PS steel wire inserted in the PS steel wire fixing part of the PS steel wire bracket is tightened and fixed to the wrist strap first, and the wrist strap is installed on the toothed wall body, The hydraulic jack is inserted into the apparatus by the prestress introduction device combined with the PS steel wire pedestal and moved upwards to move upward the moving part of the device to apply a prestress to the PS steel wire to generate a reaction force toward the toothed wall, The present invention has another object to provide a prestressed wristband for a false earthquake-proof earthquake capable of introducing an additional reaction force.

In addition, it is possible to improve the amount of the pre-stress introduced by the PS wire by improving the fixing beam of the PS steel wire used in the past earthquake-proof prestressing wedge, the PS steel wire guide and the horizontal beam to easily introduce the additional prestress And it is possible to prevent the buckling displacement of the prestress introduction device combined with the PS steel wire pedestal when the prestress is introduced, to improve the workability, to increase the safety, to enable the long diameter and to increase the economical efficiency, There is another purpose.

According to an aspect of the present invention, there is provided a prestressed band for prestressing earth soil, comprising: A wrist strap installed across the vertical file; And a strut bracket for fixing and supporting the wale band, the wale band for horizontal retention comprises: a horizontal beam disposed across the wale band; A lightweight PS steel wire fixing bracket fixed to both ends of the horizontal beam; A PS steel wire support and a prestress introduction device disposed between the lightweight PS steel wire fixing brackets; A PS steel wire which is fixedly installed over the lightweight PS steel wire fixing bracket and the PS steel wire supporting pedestal; And a PS steel wire fusing part provided at both ends of the horizontal beam, and is a long span lightweight band.

As described above, the prestressed band for prestressing earth which can introduce additional reaction force according to the present invention has the following effects.

First, since the stride interval is widened to 6 to 30 m, the stride can be saved by 50% to 70% or more, thereby reducing the construction cost.

Second, the present invention reduces the number of stratified boats and improves the efficiency of construction for excavation work.

Third, the present invention efficiently introduces the displacement of the belt zone according to the change of the earth pressure during the installation by introducing the prestress into the PS steel wire.

Fourth, the present invention can be applied to the urban area without restriction even though the shape of the belt can be formed into a low-profile blast furnace.

1 to 3 are plan views showing a conventional temporary support structure,
FIGS. 4 to 6 are plan views showing a conventional temporary tread wall,
7 and 8 are a plan view showing a conventional prestressing earth retaining method,
Fig. 9 is a perspective view showing a state of installation of a conventional band member,
10 is a perspective view showing a first embodiment of a prestressed band for prerecorded earthquakes capable of introducing additional reaction force according to the present invention,
11 is a front view showing a first embodiment of a prestressed band for prerecorded earthquakes capable of introducing additional reaction force according to the present invention,
FIG. 12 is a plan view showing a first embodiment of a prestressed band for prerecord earthquake excavation capable of introducing additional reaction force according to the present invention,
13 is an exploded perspective view showing a first embodiment of a prestressed band for prerecorded earthquakes capable of introducing additional reaction force according to the present invention,
FIG. 14 is a perspective view showing a second embodiment of a prestressed band for prerecorded earthquakes capable of introducing additional reaction force according to the present invention, FIG.
FIG. 15 is a front view showing a second embodiment of a prestressed band for pruning earth sheeting capable of introducing additional reaction force according to the present invention. FIG.
16 is a plan view showing a second embodiment of a prestressed band for prerecorded earthquakes capable of introducing additional reaction force according to the present invention,
17 is an exploded perspective view showing a second embodiment of a prestressed band for prerecorded earthquakes capable of introducing additional reaction force according to the present invention,
18 is a perspective view showing a state of installation of a prestressing strap for suspending the earth retaining structure capable of introducing additional reaction force according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[First Embodiment] A prestressed long-span lightweight wristband capable of introducing an additional reaction force

FIG. 10 is a perspective view showing a first embodiment of a prestressed belt for use in the earthquake-proof construction capable of introducing additional reaction force according to the present invention, FIG. 11 is a perspective view of a prestressed belt for a post earthquake- 12 is a plan view showing a first embodiment of a prestressed band for prestressed earthquake excavation capable of introducing additional reaction force according to the present invention and Fig. 13 is a front view showing a prestressed band for prestressed prestressing 1 is an exploded perspective view showing a first embodiment of a belt.

As shown in these drawings, a prestressed wale band P for a temporary earth retaining structure capable of introducing additional reaction force according to the present invention includes a vertical file 110 arranged at regular intervals; A wale band 120 installed across the vertical files 110; And a strut 130 for fixing and supporting the wale band 120. The horizontal wale 140 is disposed across the wale band 120, A lightweight PS wire fixing bracket 150a fixed to both ends of the horizontal beam 140; A lightweight PS strand brace joint prestress introduction device 160a disposed between the lightweight PS steel wire fixation brackets 150a; A PS steel wire 170 fixedly installed over the lightweight PS steel wire fixing bracket 150a and the lightweight PS steel wire guide pedestal 160a and a PS steel wire fixing part 210a provided at both ends of the horizontal beam 140 ).

Here, the lightweight PS wire fixing bracket 150a is a steel structure having a rectangular parallelepiped shape as a whole, and is composed of a brace plate 190a which is arranged asymmetrically on an oblique side surface; A support plate 200a integrally formed horizontally on the support plate 190a; And a PS wire fixing part 210a integrally formed horizontally on the support plate 200a.

In addition, the lightweight PS strand brace joint prestress introducing device 160a includes a fixing part 240 vertically fixed to a predetermined position on the horizontal beam 140 via a high tension bolt 300; A hydraulic jack 250 installed at a predetermined position of the fixing part 240; A moving part 260 having a PS wire 170 installed on the fixing part 240 and applying a prestress to the PS wire 170 by upward movement of the hydraulic jack 250; A displacement adjusting bolt 270 for vertically connecting and fixing the fixing part 240 and the moving part 260; And a PS steel wire guide 280 formed in the upper end of the movable part 260 in a predetermined shape.

That is, in the case of a prestress long span lightweight belt that can introduce an additional reaction force, the interval of the strut 130 of the conventional wedge wand 100 can be widened to 8 to 18 m at a distance of 2 to 3 m.

The prestressed long span lightweight belt zone capable of introducing the additional reaction force is composed of a lightweight PS steel wire fixing bracket 150a, a horizontal beam 140, a lightweight PS wire guide bracket combined with a prestress guide 160a, and a PS steel wire 170.

The lightweight PS wire fixing bracket 150a is composed of a PS wire fixing part 210a, a support plate 200a and a support plate 190a. The upper surface of the lightweight PS wire fixing bracket 150a is a point .

In addition, the horizontal beam 140 is composed of a general I-beam.

The lightweight PS strand brace joint prestress introducing device 160a includes a fixing part 240 fixed to the horizontal beam 140; A hydraulic jack 250; A movable part 260 which is moved upward by the hydraulic jack 250; And a displacement adjusting bolt 270 for connecting the fixing part 240 and the movable part 260 and fixing the movable part 260. A PS wire guide 280 is provided on the upper surface of the movable part 260, A step adjustment pedestal 310 is optionally formed on the lower surface of the fixing part 240 and is composed of a PS steel wire 170 and a PS steel wire fixing head 320.

The prestressed wale P for a temporary earth retaining structure capable of introducing additional reaction force according to the present invention having the above-described configuration includes a lightweight PS steel wire fixation bracket 150a, a horizontal beam 140, and a lightweight PS steel wire support combined prestress introduction device 160a )Wow; When the PS steel wire 170 is integrally assembled, the distance between the struts 130 can be widened to 8 to 18 m, and the strut 130 can be saved by 50% or more as compared with the conventional wale band 100.

In addition, the lower excavation can be performed while minimizing the interference of the strut 130, and the workability can be greatly improved.

Since the eccentric distance of the PS steel wire 170 for introducing the prestress is secured, the height of the belt is required to be a certain level.

That is, the higher the height of the lightweight PS wire stranding support dual-purpose telescopic guide 160a for the wristband P is, the greater the eccentricity effect of the PS wire 170 is, and the widening of the wrist strap can be simplified to effectively replace the displacement of the earth pressure at the time of construction .

In other words, at the excavation work of the ground, a certain distance from the structure to be installed at the adjacent site boundary is required.

That is, a space of 1.5 to 2.0 m corresponding to the height of the wristband P must be spaced apart from the site boundary to provide a structure.

It is possible to reduce the amount of the steel material of the strut 130 by more than 50% by enlarging the interval of the strut 130. However, there is a restriction condition that a certain distance space is required from the site boundary to the point where the structure is installed.

Hereinafter, a construction of a prestressed wale for a temporary earth retaining structure capable of introducing additional reaction force according to the present invention constructed as described above will be described.

As shown in FIGS. 10 to 13, the prestressed wale band construction method for the earthwork prestressing which can introduce additional reaction force according to the present invention includes a vertical file 110 arranged at regular intervals; A wale band 120 installed across the vertical files 110; And a strut 130 for fixing and supporting the wale band 120. The horizontal wale 140 is disposed across the wale band 120, A lightweight PS wire fixing bracket 150a fixed to both ends of the horizontal beam 140; A lightweight PS strand brace joint prestress introduction device 160a disposed between the lightweight PS steel wire fixation brackets 150a; A PS steel wire 170 fixedly installed over the lightweight PS steel wire fixing bracket 150a and the lightweight PS wire steel wire supporting bracket combined with the prestress induction device 160a; And a PS steel wire fusing unit 210a provided at both ends of the horizontal beam 140. The PS steel wire fusing unit 210a includes a PS wire guide 280 A PS wire 170 is installed on the PS wire 170. The PS wire 170 is fixed by fixing the PS wire 170 after the prestress is introduced into the PS wire fixing part 210a by a first tension by the hydraulic tension jack, The hydraulic jack 250 is upwardly moved from the pre-casting unit 160a to introduce the prestress by tilting the PS wire 170 in the second direction.

In addition, the lightweight PS strand brace joint prestress introducing device 160a includes a fixing part 240 vertically fixed to a predetermined position on the horizontal beam 140 through a high tension bolt B; A hydraulic jack 250 installed at a predetermined position of the fixing part 240; A moving part 260 having a PS wire 170 installed on the fixing part 240 and applying a prestress to the PS wire 170 by upward movement of the hydraulic jack 250; A displacement adjusting bolt 270 for vertically connecting and fixing the fixing part 240 and the moving part 260; And a PS steel wire guide 280 formed in the upper end of the movable part 260 in a predetermined shape.

The prestressed long-span lightweight belt zone capable of introducing the additional reaction force includes a lightweight PS steel wire fixing bracket 150a; A horizontal beam 140; A prestress introducing device 160a which is combined with a lightweight PS strand brace; And a PS steel wire 170.

The lightweight PS steel wire fixing bracket 150a is composed of a PS steel wire fixing part 210a, a support plate 200a and a brace plate 190a. The upper surface of the lightweight PS steel wire fixing bracket 150a is supported by a bracket 130 It plays a role.

In addition, the horizontal beam 140 is composed of a general I-beam.

A prestressed wale P for a temporary earth retaining structure capable of introducing additional reaction force according to the present invention having the above-described configuration comprises a lightweight PS steel wire fixing bracket 150a; A horizontal beam 140; A prestress introducing device 160a which is combined with a lightweight PS strand brace; When the PS steel wire 170 is integrally assembled, the distance between the struts 130 can be widened to 8 to 18 m, which can save the strut 130 by more than 50% as compared with the conventional method.

Here, the prestressing band for the earthquake excavation that can introduce additional reaction force according to the present invention requires a certain level of band height because the eccentric distance of the PS steel wire 170 for introducing the prestress must be secured.

In other words, the structure should be installed with a spacing of 1.5 to 2.0 m, which corresponds to the height of the wristband (P), from the site boundary line.

The spacing of the strut 130 can be greatly enlarged to reduce the amount of stranded steel by 50% or more. However, there is a restriction condition that a certain distance space is required from the site boundary to the point where the structure is installed.

[Second Embodiment] A prestressed low-profile lightweight wristband capable of introducing an additional reaction force

FIG. 14 is a perspective view showing a second embodiment of a prestressed band for prerecorded earthquakes capable of introducing additional reaction force according to the present invention, FIG. 15 is a perspective view of a prestressed banded prestressed prestressed prestress 16 is a plan view showing a second embodiment of a prestressed band for prestressed earth strand that is capable of introducing additional reaction force according to the present invention and FIG. 17 is a front view showing a prestressed strand for prestressed prestressing FIG. 18 is a perspective view showing the installation state of a prestressed band for prerecorded earthquakes capable of introducing additional reaction force according to the present invention. FIG.

As shown in these drawings, a prestressed wale band P for a temporary earth retaining structure capable of introducing additional reaction force according to the present invention includes a vertical file 110 arranged at regular intervals; A wale band 120 installed across the vertical files 110; And a strut 130 for fixing and supporting the wale band 120. The horizontal wale 140 is disposed across the wale band 120, A high strength bolt (300) or welded high strength I beam (230) at a predetermined position of the horizontal beam (140); A simple lightweight PS wire fixation bracket 290 fixedly installed on both ends of the high intensity I beam 230; And a PS wire 170 fixedly installed between the simple light weight PS wire fixing bracket 290.

Here, the lightweight PS wire fixing bracket 290 is a triangular-shaped bottom plate 291 having a predetermined thickness and width. A pressure plate 292 formed at right angles to the bottom plate 291; A buckle plate 293 sloped between the bottom plate 291 and the pressure plate 292; And a PS steel wire fusing unit 294 which is fixed to the above-mentioned pressure plate 292.

The high intensity I beam 230 is shorter than the horizontal beam 140 and the high intensity I beam 230 is bonded to the horizontal beam 140 to introduce a positive reflection load in a direction opposite to the usage load To the high tensile strength bolts (300) to introduce a prestress.

A PS wire guide 295 is fixedly installed at a predetermined position above the high-strength I beam 230.

Here, when the prestressed wale band is used, the distance between the position of the earth retaining plate and the structure to be installed must be a certain distance, so that the effect of introducing the prestress by the PS steel wire 170 can be seen.

That is, in the ground condition in which there is not much space between the earth plate and the installed structure, a prestress wale due to the PS steel wire 170 can not be applied.

Therefore, it is also necessary to provide a band that can reduce the height of the prestressed band by the PS wire 170.

Thus, it can be said that the height of the belt can be greatly reduced.

As shown in FIGS. 14 to 18, the prestressing band for the earthquake-proof construction capable of introducing the additional reaction force according to the present invention is added to the simple lightweight PS steel wire fixing bracket 290, the horizontal beam 140 and the PS steel wire 170 And a simple light weight PS wire fixing bracket 290 composed of a PS wire fixing part 294, a pressure plate 292 and a support plate 293 provided at both ends of the horizontal beam 140, The PS steel wire guide 295 is formed at the center of the high intensity I beam 230 and the auxiliary PS steel wire 330 is constituted so that the band member additionally introduces the prestress to the components of the fourth embodiment by the auxiliary PS steel wire 330 It is possible structure.

In the prestressed band for prestressed seams, which is capable of introducing additional reaction force according to the present invention, the PS strand 170 is applied to the welt, thereby greatly reducing the number of strands 130, Since the interval is greatly widened to 8 to 18 m, there is an advantage that the excavation can excavate the ground very easily without obstruction by the strut 130, and the structure can be installed.

In addition, even when displacement occurs in the wale due to the change of the earth pressure during the construction, it is possible to say that the welt is an innovative wale which can additionally introduce an additional prestress to the PS wire 170 to be installed safely.

As shown in FIGS. 14 to 18, a method of constructing a prestressed wale band for a temporary earth retaining structure capable of introducing additional reaction force according to the present invention includes: a vertical file 110 disposed at regular intervals; A wale band 120 installed across the vertical files 110; And a strut 130 for fixing and supporting the wale band 120. The horizontal wale 140 is disposed across the wale band 120, A high strength bolt (300) or welded high strength I beam (230) at a predetermined position of the horizontal beam (140); A simple lightweight PS wire fixation bracket 290 fixedly installed on both ends of the high intensity I beam 230; And a PS wire 170 fixedly installed between the light weight PS wire fixing brackets 290. The PS wire 170 is tensed by the hydraulic tension jack in the simple light weight PS wire fixing bracket 290 to form a horizontal beam 140 ).

Here, when the prestressed wale is used, the distance between the position of the earth retaining plate and the structure to be installed must be a certain distance, so that the effect of introducing the prestress by the PS steel wire 170 can be seen.

Thus, it can be said that the height of the belt can be greatly reduced.

As shown in FIGS. 14 to 18, a method of installing a prestressed wale for securing an earth retaining tile capable of introducing an additional reaction force according to the present invention is applied to a PS wire fixing bracket 290, a horizontal beam 140, and a PS wire 170 A simple PS steel wire fixing bracket 150a composed of a PS steel wire fusing part 294 provided at both ends of the horizontal beam 140, a support plate 292 and a support plate 293 is constructed. A PS wire guide 295 is formed at the center of the I beam 230 and an auxiliary PS wire 330 is formed so that a band can additionally introduce a prestress by the auxiliary PS wire 330. [

In the prestressing band for the earthquake-resistant construction, which is capable of introducing additional reaction force according to the present invention, the PS strand 170 is commonly applied to the wales, thereby greatly reducing the number of strands 130, 130), the excavation can excavate the ground very easily without damaging by the strut 130, and the structure can be installed.

Further, even when displacement occurs in the wale due to the change of the earth pressure during the construction, it is possible to instantly introduce an additional prestress to the PS steel wire 170 to construct an innovative wale structure that can be safely installed.

100: Wardrobe for obliteration 110: Vertical file
120: Wristband 130 Strap
140: horizontal beam 150a: lightweight PS wire fixing bracket
160a: Prestressed introduction device combined with light weight PS wire bracket
170: PS steel wire 190a:
200a: a pressure plate 210a: a PS wire fixing part
220: PS steel wire fixing part for maintenance 230: high strength I beam
240: Fixing part 250: Hydraulic jack
260: moving part 270: displacement adjusting bolt
280: PS wire guide 290: Light weight PS wire fixing bracket
291: bottom plate 292:
293: Support plate 294: PS wire fixing unit
300: High tension bolt 310: Step adjustment base
320: PS wire fixing head 330: auxiliary PS wire
P: A prestressed wale for temporary restoration where additional reaction force can be introduced

Claims

A vertical file (110) arranged at regular intervals; A wale band 120 installed across the vertical files 110; And a strut 130 for fixing and supporting the wale band 120. The horizontal wale 140 is disposed across the wale band 120, A lightweight PS wire fixing bracket 150a fixed to both ends of the horizontal beam 140; A PS steel wire support and a prestress introduction device 160 disposed between the lightweight PS steel wire fixing brackets 150a; A PS steel wire 170 fixedly installed over the lightweight PS steel wire fixing bracket 150a and the prestress introduction device 160 serving as a PS steel wire support; And a PS steel wire fusing unit 210a provided at both ends of the horizontal beam 140. The prestressed wale band for a temporary earth retaining structure is capable of introducing additional reaction force.

The method according to claim 1,
The lightweight PS steel wire fixing bracket 150a is a steel structure having a rectangular parallelepiped shape as a whole and includes a brace plate 190a arranged asymmetrically in an oblique manner on a side surface thereof; And a PS steel wire fusing unit 210a integrally formed horizontally on the support plate 200a so as to be a long span lightweight belt member Which is capable of introducing additional reaction force.

The method according to claim 1,
The lightweight PS strand brace joint prestress introducing device 160a includes a fixing part 240 vertically fixed via a bolt at a predetermined position on the horizontal beam 140; A hydraulic jack 250 installed at a predetermined position of the fixing part 240; A moving part 260 having a PS wire 170 installed on the fixing part 240 and applying a prestress to the PS wire 170 by upward movement of the hydraulic jack 250; A displacement adjusting bolt 270 for vertically connecting and fixing the fixing part 240 and the moving part 260; And a PS wire guide 280 formed in a predetermined shape inside the upper end portion of the movable part 260. The prestressed wale band for a temporary earth retaining structure capable of introducing additional reaction force.

A vertical file (110) arranged at regular intervals; A wale band 120 installed across the vertical files 110; The horizontal beam 140 is formed by joining a high intensity I beam 230 to an upper portion of the horizontal beam 140 to form a wale band 130 The horizontal beam 140 is a horizontal beam 140 which is prestressed by high tension bolts 300 or welded to each other by welding while a prismatic load is introduced in a direction opposite to the working load. The horizontal beam 140 is fixedly installed on both ends of the high- A simple light weight PS wire fixation bracket 290; And a PS steel wire (170) fixedly installed between the light weight PS wire fixing brackets (290). The prestressed wale band is a low weight and lightweight belt.

5. The method of claim 4,
The simple light weight PS steel wire fixing bracket 290 has a bottom plate 291 having a triangular shape as a whole and having a predetermined thickness and width; A pivot plate 292 formed at right angles to the bottom plate 291 and a pivot plate 293 sloped between the bottom plate 291 and the pivot plate 292; And a PS steel wire fusing unit 294 fixed to the pliers 292. The prestressed wale band is a low-strength, lightweight belt.

5. The method of claim 4,
Wherein a PS wire guide (295) is fixed at a predetermined position above the high-strength I beam (230) and is a low-profile, lightweight belt member.

5. The method of claim 4,
A lightweight PS wire fixation bracket 150a is attached to both ends of the horizontal beam 140. The lightweight PS wire fixation bracket 150a is an iron structure having a rectangular parallelepiped shape as a whole and includes a brace plate 190a )and; And a PS steel wire fusing unit 210a integrally formed horizontally on the support plate 200a and being formed as a low-profile, lightweight belt member, which is integrally formed horizontally on the support plate 190a Which is capable of introducing additional reaction force.