JP2018109318A - Method of disposing tension members and tension member disposing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tension member disposing device and a method of disposing tension members capable of efficiently disposing tension members in a sheath embedded in a concrete structure with a simple facility.SOLUTION: A tension member insertion guide device in which the tip of the tension member is fixed and a traction device for applying a traction force to the tension members are respectively provided in the vicinity of the tension member pulling-in port and in the vicinity of the tension member extracting-out port of the sheath embedded in the concrete structure, one end of a pulling wire passed through the sheath in advance is connected to the distal end portion of the tension member, and releasing the fixity of the tension member in the tension member insertion guide device, and transforming the extending direction of the tension member via the tension member insertion guide device, the tension member is drawn into the tension member pulling-in port by the pulling force of the traction device via the traction wire and placed in the sheath.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a tension material arranging method and a tension material arranging device for arranging a tension material in a sheath embedded in a concrete structure.

  Conventionally, a PC tank that is generally widely used as a liquid storage tank for storing liquefied natural gas (LNG), liquefied petroleum gas (LPG), or the like includes a cylindrical PC liquid barrier made of prestressed concrete. . In this PC breakwater, a plurality of tension members extending in the vertical direction are arranged at regular intervals, and a plurality of tension materials extending in the circumferential direction are arranged in layers at intervals. Yes.

  In particular, as a method of disposing a tension material that imparts tension by a post-tension method in the vertical direction of the PC liquid breakwater, for example, when constructing a PC liquid breakwater, a U-shaped sheath is made vertical. A method is known in which a tension material is inserted into a sheath by burying and using the top end of the PC breakwater as a work space.

  Specifically, the wire is inserted into the sheath, and the tip of the tension material to be disposed disposed at the top end of the PC liquid barrier is tied to one end of the wire exposed from one end of the sheath. The other end of the wire exposed from the other end of the sheath is connected to the crane. Then, the tension material is drawn by pulling the wire from one end of the sheath toward the other end while pulling the wire with a crane while manually guiding the tension material to one end of the sheath. Is disposed on the sheath.

  However, in the above method, since there is a restriction on the lifting range in which the wire can be pulled by the crane, it is necessary to repeat the work of laying the wire on the crane several times before the tension material is arranged. Inferior to that, the construction period tends to be prolonged. In addition, the work of guiding the tendon material to the sheath while preventing escape by human power is complicated, and tends to be disadvantageous in all aspects of labor, materials, construction costs, etc., such as ensuring work space and safety.

  Under such circumstances, Patent Document 1 discloses a PC steel wire unwinding machine, a PC steel wire inserting machine equipped with a PC steel wire feeding mechanism, and a PC steel wire arranging method using the PC steel wire winding machine. Is disclosed. An unwinder and a PC steel wire insertion machine are installed near one end of the sheath at the top end of the concrete structure, and a winder is installed near the other end of the sheath. Then, on one end side of the sheath, the PC steel wire is unwound from the unwinder using the feed mechanism of the PC steel wire insertion machine while being unwound and sent to the sheath, and on the other end side of the sheath, the winding is taken up. A traction force is applied to the PC steel wire by the machine, and the PC steel wire is disposed in the sheath.

JP 2011-89368 A

  However, since the above method is a large-scale facility including a PC steel wire insertion machine and an unwinder on one end side of the sheath, it is difficult to secure the installation location of the facility at the top end of a narrow concrete structure. In some cases, a sufficient work area cannot be secured.

  In addition, the use of the two powers of the PC steel wire insertion machine and the winder when arranging the tension material in the sheath not only tends to increase the cost, but also using the feed mechanism to turn the PC from the turntable. The work of unwinding the steel wire is inferior in workability.

  The present invention has been made in view of such problems, and the main object of the present invention is to provide a tension material capable of efficiently arranging a tension material in a sheath embedded in a concrete structure with simple equipment. It is providing the arrangement | positioning apparatus and the arrangement | positioning method of a tendon.

  In order to achieve such an object, the tension material insertion method according to the present invention fixes the tip of the tension material to each of the vicinity of the tension material inlet and the vicinity of the tension material outlet of the sheath embedded in the concrete structure. A tensioning material insertion guide device and a tensioning device for applying a traction force to the tensioning material, and connecting one end of a pulling wire penetrating through the sheath in advance to the distal end of the tensioning material, and inserting the tensioning material Release the fixation of the tendon in the guide device, and change the extension direction of the tendon via the tendon insertion guide device, while pulling the tendon by the pulling force of the pulling device via the pulling wire. Is drawn into the tendon material inlet and disposed in the sheath.

  According to the arrangement method of the tension material of the present invention, the tension material insertion guide device capable of fixing the tension material and changing the extension direction of the tension material is used. As a result, even if the tension material scheduled to be placed is deployed at any position on the construction site, the tension material is unwound by simply moving the tension material insertion guide device, and the distal end thereof is used as the tension material inlet of the sheath. It becomes possible to arrange.

  In addition, since it is not necessary to place the tension material to be installed near the tension material inlet of the sheath, it is possible to secure a wide working area, greatly improving the workability and workability related to the arrangement of the tension material on the sheath. It becomes possible to improve.

  In the method for inserting a tendon according to the present invention, the sheath has a U-shape, the tendon entrance and the tendon exit are installed at the top end of the concrete structure, and the tendon insertion guide device includes: The tension material is arranged in a suspended state in the vicinity of the tension material inlet of the sheath, and the extension direction of the tension material is changed from the upper direction to the vertically lower direction via the tension material insertion guide device. To do.

  According to the arrangement method of the tension material of the present invention, the tension material insertion guide device is arranged in a suspended state without being installed at the top end of the concrete structure. Therefore, in the vicinity of the tension material inlet of the U-shaped sheath. Thus, it is possible to secure a wider working space related to the work of arranging the tendon.

  Furthermore, since the tension material insertion guide device functions like a fixed pulley by changing the extension direction of the tension material from the upper direction to the vertical downward direction, the tension material can be applied to the tension material without applying excessive traction force to the tension material. On the other hand, the tension material can be drawn into the U-shaped sheath only by applying a traction force by the traction device.

  As a result, even if the concrete structure is a large-scale structure having a height such as an LNG tank, it is not necessary to use a large apparatus such as a crane, and the arrangement work can be efficiently performed with simple equipment. Is possible.

  The tension material arranging device of the present invention is a tension material arranging device for drawing and arranging a tension material in a sheath embedded in a concrete structure, and is arranged in the vicinity of the tension material outlet of the sheath. A traction device that applies a traction force to the tendon, a direction changer that is disposed in the vicinity of the tendon pull-in opening of the sheath, and that changes the extending direction of the tendon in contact, and a fixture that fixes the tendon And a tendon material insertion guide device.

  According to the tension material arranging device of the present invention, the tension material insertion guide device includes a fixture for fixing the tension material and a direction changing tool for changing the extending direction of the contacted tension material. As a result, regardless of the location of the tendon material to be placed on the sheath, the tension material is guided to the tip of the sheath only by moving the tension material insertion guide device with the tension material fixed. It can arrange | position in the material drawing inlet vicinity. Thereby, it becomes possible to arrange | position a tension | tensile_strength efficiently in a sheath with the simple equipment by the tension | tensile_strength insertion guide apparatus and the traction apparatus which pulls a tension | tensile_strength.

  In addition, since the tension material can be prevented from running away such that the tension material moves in the direction opposite to the insertion direction by the tension material insertion guide device, the equipment and human power for guiding the tension material in the vicinity of the tension material drawing port can be eliminated. At the same time, it is possible to improve the safety of work related to the disposition of the tendon.

  According to the present invention, the tension material can be efficiently sheathed with a simple equipment including a tension material insertion guide device that can fix the tension material and change the extension direction of the tension material, and a traction device that pulls the tension material. It becomes possible to arrange | position to.

It is a figure which shows the outline of the tension material arrangement | positioning apparatus of this invention by planar view. It is a figure which shows the tension material arrange | positioned in the height direction of the PC liquid breakwater of this invention. It is a figure which shows the tension material turntable and tension material insertion guide apparatus of this invention. It is a figure which shows the detail of the tension material insertion guide apparatus of this invention. It is a figure showing the outline of the traction device of the present invention. It is a figure which shows the detail of the traction apparatus of this invention. It is a figure which shows the arrangement | positioning method of the tendon of this invention (the 1). It is a figure which shows the arrangement | positioning method of the tendon of this invention (the 2). It is a figure which shows the arrangement | positioning method of the tendon of this invention (the 3). It is a figure which shows the arrangement | positioning method of the tendon of this invention (the 4).

  The tension material arranging device and the tension material arranging method of the present invention are arranged for a concrete structure that is intended to apply a compressive force by applying a tension force to the tension material by a post-tension method. It is an apparatus and method used when doing. Although the present invention can be applied to any prestressed concrete structure, in the present embodiment, the tension material is arranged in the height direction with respect to the PC liquid bank of the PC tank storing LNG. Taking the case of arrangement as an example, details will be described below with reference to FIGS.

  As shown in the plan view of FIG. 1, the PC tank 1 includes an inner tank 2 that stores the LNG 6, an outer tank 3 that protects the inner tank 2, and a cylindrical PC liquid barrier that serves as a liquid barrier. 4 and a sectional view of FIG. 7, it is composed of a concrete foundation plate 5 supported by a large number of piles.

  As shown in FIG. 1, a plurality of tension members 7 extending in the height direction are arranged on the PC liquid barrier 4 with intervals in the circumferential direction, and the tension materials extending in the circumferential direction. (Not shown) are arranged at a plurality of intervals in the height direction. Any tension material 7 extending in the height direction may be used as long as it is used for prestressed concrete, but in the present embodiment, as shown in FIG. A bundle of a plurality of wires 71 is used.

  These tendon members 7 are arranged in a U-shaped sheath 8 embedded in the PC liquid barrier 4 as shown in the side view of FIG. A plurality of U-shaped sheaths 8 are embedded in a standing manner in the circumferential direction of the PC liquid barrier 4 and have a cross section sufficiently larger than the tension material 7. As the material, any pipe material may be employed as long as it is generally used when the post-tension type tension material 7 is installed.

  In addition, after the tension material 7 is arrange | positioned in the U-shaped sheath 8, tension | tensile_strength is provided to the tension material 7 and the inside of the U-shaped sheath 8 is filled with grout. As a result, the PC tank 1 can prevent cracks that may occur in the PC liquid barrier 4 in a state where no leakage pressure is applied to the PC liquid barrier 4, that is, during normal operation.

  Accordingly, the tension material outlet 81 and the tension material inlet 82 of the U-shaped sheath 8 are both PC liquid barriers so that tension can be applied to the tension material 7 that has penetrated the U-shaped sheath 8 later. It arrange | positions so that it may be located in 4 top end surfaces, and has the structure which can expose both ends of the tension material 7 from the top end surface of the PC liquid-proof wall 4.

  Next, a tension material turntable 10, a traction device 20, and a tension material insertion guide device 30 that are used when the tension material 7 is disposed on the U-shaped sheath 8 embedded in the PC liquid barrier 4 are provided. The details of the tendon material arranging device 100 will be described. As shown in FIGS. 1 and 2, the traction device 20 and the tendon insertion guide device 30 are arranged at the top end of the PC liquid barrier 4, and the tendon turntable 10 is provided on the tendon insertion guide device 30. It is arranged below.

  As shown in FIG. 3, the tendon turntable 10 is a device that houses the tendon 7 disposed in the U-shaped sheath 8, and rotates the tendon 7 in the horizontal direction so that the tendon 7 is inserted. Send to 30. The tendon turntable 10 may be installed anywhere, but is installed on the ground in the present embodiment. Moreover, it is not always necessary to employ the tendon material turntable 10, and any may be employed as long as it can accommodate the tendon material 7.

  As shown in FIG. 3, the tendon material insertion guide device 30 includes a frame 31 having a substantially rectangular parallelepiped shape whose longitudinal direction exceeds the assembly scaffold disposed on the PC liquid barrier 4, and an inner space of the frame 31. An introduction port 32 that guides the tendon material 7, a fixing device 33 that grips the tendon material 7 that has passed through the introduction port 32, and an extension direction of the tendon material 7 that has passed through the introduction port 32 and the fixing device 33. And a direction changing tool 34.

  As shown in FIGS. 4 (a) and 4 (b), the frame 31 is formed by assembling a plurality of steel frames vertically and horizontally, and a suspension wire binding portion 311 is provided in the vicinity of the upper end portion. Therefore, the tendon insertion guide device 30 can be suspended by the crane by tightening the suspension wire W to the suspension wire tightening portion 311.

  The introduction port 32 is a cylindrical member provided with a through-hole 321 penetrating in the vertical direction. The introduction port 32 is disposed at a lower portion of the side end of the frame 31 that forms a substantially rectangular parallelepiped. Guide to the department. The through hole 321 is formed in a rectangular cross section, and the tension member 7 in a state where a plurality of PC steel strands 71 guided to the inner space of the frame 31 is bundled passes through the through hole 321 through the cross section. As a result, it is deformed into a substantially rectangular cross section.

  As shown in FIGS. 4A and 4B, the fixing device 33 is disposed above the through hole 321 provided in the introduction port 32 and in a position in contact with the tension material 7 that has passed through the through hole 321. A wedge member 331 and a hinge member 332 that supports the wedge member 331 so as to be movable up and down are provided. And the wedge member 331 is formed in the magnitude | size which can be inserted in the through-hole 321, when downward external force acts.

  As a result, when the tension member 7 passing through the introduction port 32 moves upward toward the inner space of the frame 31, the side surface formed in a substantially rectangular cross section comes into contact with the wedge member 331, and the wedge member An upward external force is applied to 331. For this reason, the wedge member 331 maintains the state located above the through-hole 321, and the tension member 7 moves smoothly in the through-hole 321 of the introduction port 32.

  However, when the tension member 7 moves downward from the inner space of the frame 31, the side surface formed in a substantially rectangular cross section contacts the wedge member 331 and applies a downward external force to the wedge member 331. Let Thereby, since the wedge member 331 is inserted into the through-hole 321, the tension member 7 is sandwiched between the wedge member 331 and the hole wall of the through-hole 321.

  As described above, since the fixing device 33 can grip the tension material 7 at the introduction port 32, for example, when the tension material 7 shows a behavior of moving the introduction port 32 downward during the disposition work of the tension material 7. Furthermore, the escape of the tendon 7 can be prevented, and the safety of the work related to the arrangement of the tendon 7 can be enhanced.

  In addition, a wire (not shown) is suspended from the wedge member 331 of the fixing device 33, and the tension member 7 is also gripped by pulling the wire and inserting the wedge member 331 into the through hole 321 of the introduction port 32. It has a configuration that can.

  And the direction change tool 34 is installed in the inner space part of the flame | frame 31, and is provided with the some pipe roller 342 which connects a pair of support plate 341 which made the plate | board surface oppose, and a pair of support plate 341. FIG. The support plate 341 is made of a plate material in which a ring-shaped rounded rectangle is halved, and is arranged such that two rounded corners each having a plate surface of a vertical shape and having a 90-degree arc are positioned above. . The plurality of pipe rollers 342 are arranged in a ladder shape with intervals along the longitudinal direction of the support plate 341.

  As a result, the tendon 7 that has passed through the introduction port 32 and the fixing device 33 and moved upward is guided by the direction changer 34 as shown in FIG. 4B, and is sent to each of the plurality of pipe rollers 342. It contacts in the mode of mounting. Then, the tension material 7 changes its extending direction twice by the two rounded corners, and when passing through the direction changing tool 34, the direction of the tension material 7 is changed by 180 ° C. Thus, the tendon material 7 guided to move downward is discharged from the tendon material insertion guide device 30 outward and downward through the outlet 35 provided in the frame 31.

  Thus, the tension material 7 whose direction of extension is changed from the upper direction to the lower direction by passing through the tension material insertion guide device 30 is, as shown in FIG. A traction force is applied by the traction device 20 via the connected traction wire 9. Since the pair of support plates 341 are located on both sides of the tendon member 7, the direction changer 34 does not deviate even when some external force is applied during towing.

  As shown in FIG. 5, the traction device 20 includes a frame 21 that forms a substantially rectangular parallelepiped and a traction jig 22 that pulls the traction wire 9, and the traction wire 9 is wound around the traction jig 22. In addition, a so-called electric winch capable of unwinding is employed. Any pulling jig 22 may be adopted as long as it can wind up the pulling wire 9, and a plurality of pulling jigs 22 may be provided instead of only one.

  The frame 21 is formed by assembling a plurality of steel frames vertically and horizontally, and an upper portion thereof is provided with a hanging wire binding portion 211 and a roller 212 for changing the extending direction of the wire. Therefore, the traction device 20 can be suspended by the crane by tightening the suspension wire W to the suspension wire tightening portion 211.

  In addition, at the lower part of the frame 21, at least the tension material 7 to be disposed in plan view, the tension material outlet 81 of the U-shaped sheath 8, and the tension material of the other U-shaped sheath 8 adjacent thereto. A stand 213 having a length that can extend over both of the service entrances 82 is provided. The mount 213 is provided with a through hole 214 at least at a position facing the tension material outlet 81 when placed on the top end of the PC tank 1, and the U-shaped through the through hole 214. The tension material 7 and the pulling wire 9 drawn out from the tension material outlet 81 of the sheath 8 are taken into the inner space of the frame 21.

  In addition, as shown in FIG. 6A, the tension material outlet 81 of the U-shaped sheath 8 to which the tension material 7 is scheduled to be disposed, and another U-shaped sheath adjacent to the tension material outlet are provided on the gantry 213. A bolt hole 215 is provided in the vicinity of the position facing the tension material drawing port 82 of 8, and the frame 21 can be fixed to the top end of the PC tank 1 by the fastener 40. The fastener 40 is provided in each of the bolt 41 inserted through the bolt hole 215, the tension material outlet 81 and the tension material inlet 82 of the U-shaped sheath 8, and as shown in FIG. 6 (b). The bolt 42 fastened to the socket 83 of the sheath 8 and the high nut 43 that can be screwed to both are provided.

  Note that the fastener 40 is not necessarily limited to the above-described configuration, and any one may be adopted as long as the frame 21 of the traction device 20 can be fixed to the top end of the PC tank 1. Further, in the present embodiment, as shown in FIG. 5, two fixed pulleys 23 and 24 are installed in the inner space of the frame 21 and exposed from the tension material outlet 81 of the U-shaped sheath 8. The pulling wire 9 is pulled after being guided to the pulling jig 22 via the fixed pulleys 23 and 24. However, the number of the fixed pulleys 23 and 24 may be any number, and the fixed pulleys 23 and 24 may not be used.

  A method of drawing and arranging the tension material 7 in the U-shaped sheath 8 using the tension material arranging device 100 having the above-described configuration will be described below.

  First, the traction device 20 is suspended by a crane, and as shown in FIG. 5, the tension material pulling of the U-shaped sheath 8 which is the top end of the PC liquid barrier 4 and is intended to dispose the tension material 7. The traction device 20 is fixed to the top end of the PC liquid barrier 4 using a fastener 40 by installing the outlet 81 and a tension material drawing port 82 of another U-shaped sheath 8 adjacent thereto.

  In the present embodiment, as a method of disposing the tension material 7 on the U-shaped sheath 8, the tension material 7 is made U-shaped by using a pulling wire 9 having higher flexibility than the tension material 7. A so-called pull-through method is employed in which the sheath 8 is pulled into the sheath 8. Therefore, as a pretreatment for drawing the tendon 7 into the U-shaped sheath 8, an operation of penetrating the pulling wire 9 through the U-shaped sheath 8 is performed.

  Specifically, since a linear material (not shown) is passed through the U-shaped sheath 8 at the time of shipment, the end of the linear material on the tension material outlet 81 side and the traction device 20 are connected. The traction wire 9 that has been wound up is connected, and the traction wire 9 is unwound while the linear material is pulled out from the tension material drawing port 82 side. Thereby, since the linear material in the U-shaped sheath 8 is replaced with the pulling wire 9, the linear material is removed from the end portion of the pulling wire 9 on the side of the tension material drawing port 82.

  Next, the tension material turntable 10 is disposed at a desired position on the ground, and the tension material insertion guide device 30 is suspended by a crane above the tension material turntable 10. Then, the tension material 7 is unwound from the tension material turntable 10 and passed through the fixing device 33 and the direction changing tool 34 from the introduction port 32 of the tension material insertion guide device 30, and the distal end portion 72 of the tension material 7 is attached to the frame 31. Arranged near the outlet 35.

  In this state, the tension material insertion guide device 30 is further lifted while holding the tension material 7 using the fixing device 33 of the tension material insertion guide device 30. As shown in FIGS. 1 and 7, provided at the frame 31, the tension material inlet 82 of the U-shaped sheath 8 which is the top end of the PC liquid barrier 4 and is intended to dispose the tension material 7. It arrange | positions in the position where the outlet 35 of the tensioned material 7 becomes coaxial in the vertical direction. As described above, the tension material 7 can be pulled out while the tension material turntable 10 is installed on the ground, and the tip of the tension material 7 can be disposed at the top end of the PC liquid-proof wall 4. Can be greatly improved.

  The arrangement of the tendon insertion guide device 30 is such that if the outlet 35 provided in the frame 31 and the tendon inlet 82 of the U-shaped sheath 8 are coaxial in the vertical direction, the PC liquid barrier It may be installed at the top of 4 or may be kept suspended.

  In addition, the orientation of the tendon insertion guide device 30 may be adjusted so that the longitudinal direction of the frame 31 that forms a substantially rectangular parallelepiped is directed to the radial direction of the PC liquid barrier 4. Accordingly, the introduction port 32 of the tendon 7 provided in the tendon insertion guide device 30 is disposed outside the PC liquid barrier 4 in a plan view. Therefore, the installation position of the tendon insertion guide device 30 may be adjusted so that the tendon turntable 10 is disposed below the introduction port 32.

  When the above pretreatment step is completed, the tip 72 of the tendon 7 and the end of the traction wire 9 on the tendon pull-in port 82 side are connected, and the tendon 7 by the fixing device 33 of the tendon insertion guide device 30 is connected. Release the grip. After that, the pulling-in work of the tension material 7 to the U-shaped sheath 8 is started.

  First, as shown in FIG. 8, the traction device 20 starts to wind the traction wire 9 to apply a traction force to the tension member 7, and the distal end portion 72 of the tension member 7 is moved to the U-shaped bottom portion of the U-shaped sheath 8. Pull in towards. At this time, since the direction changing tool 34 with which the tension material 7 comes into contact can be regarded as one fixed pulley, the tension material 7 that hangs down on both sides of the direction changing tool 34 is transferred from the direction changing tool 34 to the tension material 7. The weight up to the height position of the front end portion 72 is the same amount and offset.

  Therefore, when pulling the tendon material 7 toward the U-shaped bottom portion of the U-shaped sheath 8, the tension material of the height difference L <b> 1 between the distal end portion 72 of the tendon material 7 and the tendon turntable 10 is pulled by the traction device 20. The tension material 7 can be drawn into the U-shaped sheath 8 only by applying a load corresponding to the weight of 7 to the tension material 7.

  Next, as shown in FIG. 9, after the distal end portion 72 of the tension material 7 reaches the U-shaped bottom portion of the U-shaped sheath 8, the tension material 7 is moved from the U-shaped bottom portion of the U-shaped sheath 8 to the U-shape. It is pulled up toward the tendon outlet 81 of the character-shaped sheath 8. At this time, the direction changing tool 34 and the U-shaped bottom portion of the U-shaped sheath 8 that are in contact with the tendon 7 can be regarded as two constant pulleys. Therefore, as shown in FIG. 10, the load applied to the traction device 20 may be only a load corresponding to the weight of the tension material 7 of the height difference L2 between the rear end portion 73 of the tension material 7 and the tension material turntable 10. .

  In this way, it is possible to safely and efficiently carry out the disposing work of the tendon 7 without applying an excessive traction force to the tendon 7. Therefore, it is possible to easily dispose the tension material without using a large-scale device such as a crane.

  In this way, as shown in FIG. 2, when the distal end portion 72 of the tendon 7 is exposed from the tendon exit 81 of the U-shaped sheath 8, traction by the traction device 20 is stopped.

  Thereafter, the end portions of the tension members 7 are temporarily fixed to the top end of the PC liquid barrier 4, and then the tension member disposing device 100 is removed or the sheath 8 on which the tension members 7 are to be newly disposed. The tendon material arranging device 100 is moved to the arrangement position. Then, a tension force is applied to the temporarily fixed tension material 7, and the ends of the tension material 7 are fixed to the tension material outlet 81 and the tension material inlet 82 of the U-shaped sheath 8. And after grout is inject | poured in the U-shaped sheath 8, the edge part of the tension | tensile_strength material 7 is coat | covered with a cap.

  As described above, according to the disposing method of the tendon material 7 using the tendon material disposing device 100, the tendon material insertion guide device 30 is connected to the PC liquid-proofing even when the disposition material 7 is disposed on the ground. The tip 72 of the tendon 7 can be disposed at the tendon inlet 82 of the U-shaped sheath 8 simply by lifting up to the top of the bank 4. For this reason, it is possible to efficiently dispose the tendon 7 on the U-shaped sheath 8 with simple equipment including at least the tendon insertion guide device 30 and the traction device 20 at the top end of the PC breakwater 4. Is possible.

  Further, the tension material insertion guide device 30 can be arranged in the vicinity of the tension material drawing port 82 of the U-shaped sheath 8 in a suspended state, and the tension material 7 can be disposed. As a result, a wide working area can be secured at the top end of the PC breakwater 4, and the workability and workability related to the disposition of the tension material 7 on the U-shaped sheath 8 can be greatly improved. Become.

  In addition, the arrangement | positioning method and the tension | tensile_strength arrangement | positioning apparatus 100 of the tension material 7 of this invention are not limited to the said embodiment, A various change is possible in the range which does not deviate from the meaning of this invention. Needless to say.

  For example, in the present embodiment, the tendon material 7 is disposed on the U-shaped sheath 8 using the tendon material disposing apparatus 100. However, the present invention is not necessarily limited to this, and the shape of the sheath is any. May be.

  Moreover, in this Embodiment, although the tension | tensile_strength 7 extended in the height direction of the PC liquid barrier 4 was arrange | positioned using the tension | tensile_strength arrangement | positioning apparatus 100, it is not necessarily limited to this. If the tensioning material insertion guide device 30 can be installed in the vicinity of the tensioning material inlet 82 of the sheath 8 and the traction device 20 can be installed in the vicinity of the tensioning material outlet 81, for example, the tensioning material 7 extending in the circumferential direction of the PC liquid barrier 4 can be used. It is also possible to arrange. In this case, the position of the introduction port 32 provided in the frame 31 is appropriately changed so that the tension material 7 supplied from the tension material turntable 10 is smoothly supplied to the direction changing tool 34 of the tension material insertion guide device 30. Good.

  Further, the tension material insertion guide device 30 may be provided with a feeding device having power for feeding the tension material 7 to the direction changing tool 34 below the introduction port 32 of the frame 31. If it carries out like this, the pulling-in operation | work of the tension material 7 to the tension material drawing port 82 of the U-shaped sheath 8 can be implemented more smoothly, and it becomes possible to reduce the effort at the time of arrange | positioning the tension material 7 significantly. .

1 PC tank 2 Inner tank 3 Outer tank 4 PC breakwater 5 Basic version 6 LNG
7 Tension material 71 PC steel strand 72 Front end portion 73 Rear end portion 8 Sheath 81 Tension material outlet 82 Tension material inlet 9 Tension wire 10 Tension material turntable 20 Tension device 21 Frame 211 Suspension wire binding portion 212 Roller 213 Mounting base 214 Through hole 215 Bolt hole 22 Pulling jig 23 Fixed pulley 24 Fixed pulley 30 Tension material insertion guide device 31 Frame 32 Introduction port 321 Through hole 33 Fixing device 331 Wedge member 332 Hinge member 34 Direction changer 341 Support plate 342 Pipe roller 35 Guide Outlet 40 Fastener 41 Bolt 42 Bolt 43 High nut 100 Tensile material disposing device

Claims (3)

A tension material insertion guide device in which the tip of the tension material is fixed to each of the vicinity of the tension material inlet and the vicinity of the tension material outlet of the sheath embedded in the concrete structure, and a traction device for applying a traction force to the tension material And place
While connecting one end of a pulling wire that has penetrated the sheath in advance to the distal end of the tendon, and releasing the tension member in the tendon insertion guide device,
While changing the extension direction of the tendon via the tendon insertion guide device, the tendon pulls the tendon into the tendon draw-in port by the pulling force of the pulling device via the pull wire. A disposing method for a tendon, comprising disposing. It is the arrangement | positioning method of the tendon of Claim 1, Comprising:
The sheath is U-shaped, and the tension material inlet and the tension material outlet are installed at the top of the concrete structure,
The tendon insertion guide device is arranged in a suspended state in the vicinity of the tendon pull-in port of the sheath,
The tension material extending method is characterized in that the extension direction of the tension material is changed from the upward direction to the vertically downward direction via the tension material insertion guide device. A tension material arranging device for drawing and arranging a tension material in a sheath embedded in a concrete structure,
A traction device that is disposed in the vicinity of the tension material pulling outlet of the sheath and that exerts a traction force on the tension material;
A tensioning material insertion guide device provided with a direction changing tool that is arranged near the tensioning material drawing port of the sheath and changes the extending direction of the tensioning material that has contacted, and a fixing tool that fixes the tensioning material;
The tension material arrangement | positioning apparatus characterized by comprising.