JP2011149250A - Device for arranging linear member, method for arranging the same, method for construction of structure, and tower structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To arrange a linear member on a structure without rotating the structure to be installed. <P>SOLUTION: A rotary member 12 movable in a peripheral direction of the erected structure 14 is arranged on a periphery of the structure 14. The rotary member 12 is provided with a regulating means 38 through which are inserted the lower ends of the linear members 26, 28 which are fixed the upper ends to the structure 14. Thereby, by rotating the rotary member 12, the linear members 26, 28 are spirally arranged on the periphery of the structure 14. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a linear member arranging device, a linear member arranging method, a structure building method, and a tower-like structure, in which a linear member is arranged in a structure related to the construction field.

  Technology to improve the compression and bending strength of structures by placing ring-shaped or spiral lateral restraint bars inside or on the outer periphery of concrete structures that make up piles that support the roof of a building Is generally known.

  For example, as shown in FIG. 23, in the method for enhancing the bending strength of a concrete columnar body disclosed in Patent Document 1, the PC pile 502 is rotated while applying a constant tension to the winding material 500, and from the outside of the longitudinal reinforcing steel material 504. The winding material 500 is wound around the outer periphery of the PC pile 502. Thereby, the longitudinal reinforcement steel material 504 is integrated with the PC pile 502, and the bending strength of the PC pile 502 is enhanced.

  However, in this method, it is necessary to rotate the structure (PC pile 502) itself, which is the installation target of the linear member (winding material 500), and arrange the linear member on the structure. For example, it is technically difficult to rotate tower structures such as transmission line towers and wind power generation towers, and upright structures that constitute main bodies such as long piles. It is difficult to apply the method for increasing the bending strength of concrete columnar bodies.

JP-A-9-324494

  This invention considers the fact which concerns, and makes it a subject to arrange | position a linear member to this structure, without rotating the structure used as installation object.

  According to the first aspect of the present invention, there is provided a rotating member that is disposed around an upright structure and is movable in the circumferential direction of the structure, and a linear member that is provided on the rotating member and has an upper end fixed to the structure. It has a restricting means through which the lower end of the member is inserted, and a driving means for moving the rotating member in the circumferential direction of the structure.

  In the first aspect of the present invention, a rotating member that is movable in the circumferential direction of the structure is disposed around the upright structure. The rotating member is provided with a regulating means. The lower end portion of the linear member whose upper end portion is fixed to the structure is inserted into the restricting means. The rotating member is moved in the circumferential direction of the structure by the driving means.

Therefore, a linear member can be helically arranged around the structure.
Moreover, a linear member can be arrange | positioned to this structure, without rotating the upright structure used as installation object. Therefore, a linear member can be arrange | positioned to structures which comprise main bodies, such as tower-like structures, such as a transmission line tower and a tower for wind power generation, and a long pile, for example. In addition, for example, a linear member can be disposed on the main body of an existing column that is a structure that cannot rotate. In other words, the present invention can be applied when the linear member is arranged around the column main body in the reinforcement work for improving the compression strength and bending strength of the column by installing the linear member on the existing column main body.

  According to a second aspect of the present invention, the two rotating members move in the opposite directions with respect to the circumferential direction of the structure.

  In the invention according to claim 2, the spiral wire is swung in one of the circumferential directions of the structure upward or downward by moving the two rotating members in the opposite direction with respect to the circumferential direction of the structure. And a spiral linear member swung in the other direction can be arranged.

  For example, when a linear member is spirally installed on the outer peripheral surface of the structure and tension is applied to the linear member to introduce prestress in the vertical and circumferential directions of the structure, the linear member is installed in the structure. If there is only one linear member or if the turning directions of a plurality of linear members installed in the structure are all the same, the structure may be twisted. Since the turning directions of the two linear members arranged on the body are different, if the two linear members are installed on the outer peripheral surface of the structure in this arrangement, the structure is caused by the application of tension to the linear member. Twist that occurs in the body can be reduced.

  According to a third aspect of the present invention, the same linear member is inserted through the restricting means provided on the rotating member arranged in the vertical direction.

In the invention according to claim 3, a plurality of rotating members are arranged in the vertical direction. And the same linear member is penetrated by the control means provided in these rotation members.
Therefore, the linear member can be arranged in various spiral shapes by adjusting the rotation angles of the plurality of rotating members. In addition, since the linear member is regulated at a plurality of locations in the vertical direction, the linear member can be arranged around the structure with high accuracy.

  Invention of Claim 4 has the fixing process which fixes the upper end part of a linear member to the upright structure, and the movement process which moves the lower end part of the said linear member to the circumferential direction of the said structure .

In the invention according to claim 4, the linear member arranging method includes a fixing step and a moving step. In the fixing step, the upper end portion of the linear member is fixed to the upright structure. In the moving step, the lower end portion of the linear member is moved in the circumferential direction of the structure.
Therefore, in the linear member arranging method, the linear member can be helically arranged around the structure. Moreover, a linear member can be arrange | positioned to this structure, without rotating the structure used as installation object.

  The invention according to claim 5 is a fixing step of fixing the upper end portion of the linear member to the structure standing upright on the base, and the lower end portion of the linear member is moved in the circumferential direction of the structural body so that the linear shape An installation step of winding a member around the outer peripheral surface of the structure, a prestress introduction step of applying a prestress in the vertical direction and the circumferential direction of the structure by applying tension to the wound linear member, A fixing step of fixing a lower end portion of the linear member to a lower portion of the base or the structure.

In the invention described in claim 5, the structure construction method includes a fixing step, an installation step, a prestress introduction step, and a fixing step.
In the fixing step, the upper end portion of the linear member is fixed to the structure standing upright on the base.
In the installation step, the lower end portion of the linear member is moved in the circumferential direction of the structure, and the linear member is wound around the outer peripheral surface of the structure.
In the pre-stress introduction step, tension is applied to the wound linear member. This introduces prestress in the vertical direction and circumferential direction of the structure.
In the fixing step, the lower end portion of the linear member is fixed to the lower portion of the base or the structure.

Therefore, in the construction method of the structure, the linear member can be spirally arranged around the structure. Moreover, a linear member can be arrange | positioned to this structure, without rotating the structure used as installation object.
Further, by winding the linear member around the outer peripheral surface of the structure, the structure is constrained in the circumferential direction and a confining effect is exhibited. Therefore, compared with the configuration in which the linear member is not wound around the outer peripheral surface of the structure, the compressive stress generation part of the structure (the part of the structure where the compressive stress is generated due to the bending moment generated in the structure) This improves the resistance to bending compression failure that occurs.

Moreover, prestress is introduce | transduced to the up-down direction and circumferential direction of a structure by giving tension | tensile_strength to the linear member wound around the outer peripheral surface of the structure.
The bending tensile stress generated due to the bending moment acting on the structure due to an earthquake, wind, or the like is reduced by the vertical prestress introduced into the structure. Therefore, compared to a configuration in which no prestress is introduced in the vertical direction, the bending tension generated in the tensile stress generation part of the structure (the part of the structure where tensile stress is generated due to the bending moment generated in the structure) Strength against fracture and crack resistance of concrete are improved.

  In addition, the circumferential prestress introduced into the structure causes the structure to be more restrained in the circumferential direction and exhibits a high confinement effect. Therefore, compared with the structure which only wound the linear member on the outer peripheral surface of a structure, the proof stress with respect to the bending compressive fracture which generate | occur | produces in the compressive-stress generation | occurrence | production part of a structure improves more.

  In this way, by introducing prestress in the vertical direction and circumferential direction of the structure by the linear members wound around the outer peripheral surface of the structure, both the bending tensile fracture resistance and the bending compression fracture resistance are improved. To do. That is, it is possible to improve the yield strength against bending fracture caused by the bending moment acting on the structure.

  The invention described in claim 6 is a tower-like structure having the structure in which the linear members are arranged by the linear member arranging method according to claim 4.

  In the invention described in claim 6, the tower-like structure having the structure in which the linear member is arranged without being rotated can be constructed by the linear member arranging method described in claim 4.

  The invention described in claim 7 is a tower-like structure constructed by the structure construction method described in claim 5.

  In the invention described in claim 7, the tower-like structure having the structure in which the linear members are arranged without being rotated can be constructed by the structure building method described in claim 5.

  Since this invention set it as the said structure, a linear member can be arrange | positioned to this structure, without rotating the structure used as installation object.

It is explanatory drawing which shows the construction method of the structure based on the 1st Embodiment of this invention. It is explanatory drawing which shows the construction method of the structure based on the 1st Embodiment of this invention. It is an AA arrow line view of FIG.1 (c). It is explanatory drawing which shows the caster which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the caster which concerns on the 1st Embodiment of this invention. It is a BB arrow line view of FIG. It is a perspective view which shows the groove | channel which concerns on the 1st Embodiment of this invention. It is explanatory drawing which shows the insertion hole which concerns on the 1st Embodiment of this invention. It is a perspective view showing the upper part of the structure concerning a 1st embodiment of the present invention. It is explanatory drawing which shows the foundation which the structure based on the 1st Embodiment of this invention stands upright. It is explanatory drawing which shows the connection tool which concerns on the 1st Embodiment of this invention. It is an elevation view which shows the tower-like structure which concerns on the 1st Embodiment of this invention. It is a perspective view which shows the modification of the arrangement | positioning apparatus of the linear member which concerns on the 1st Embodiment of this invention. It is a perspective view which shows the modification of the arrangement | positioning apparatus of the linear member which concerns on the 1st Embodiment of this invention. It is a perspective view which shows the modification of the rotation mechanism which concerns on the 1st Embodiment of this invention. It is a perspective view which shows the arrangement | positioning apparatus of the linear member which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows the arrangement | positioning apparatus of the linear member which concerns on the 3rd Embodiment of this invention. It is explanatory drawing which shows the modification of the method of extending | stretching the linear member which concerns on embodiment of this invention. It is explanatory drawing which shows the modification of the method of extending | stretching the linear member which concerns on embodiment of this invention. It is explanatory drawing which shows the example of the drive device which concerns on embodiment of this invention. It is explanatory drawing which shows the example of the drive device which concerns on embodiment of this invention. It is explanatory drawing which shows the example of the drive device which concerns on embodiment of this invention. It is explanatory drawing which shows the bending strength reinforcement | strengthening method of the conventional concrete columnar body.

  With reference to the drawings, a linear member arranging device, a linear member arranging method, a structure building method, and a tower-like structure according to the present invention will be described.

  First, a first embodiment of the present invention will be described.

  As shown in FIG. 3 which is an elevation view of FIG. 1C and an AA arrow view of FIG. 1C, the linear member arrangement device 10 includes a rotating member 12 and insertion as a regulating means. It has a hole 38 and driving means (not shown).

  As shown in FIG.1 (c), the rotation member 12 is arrange | positioned around the lower part of the structure 14 made from reinforced concrete standing upright on the foundation 16 made from reinforced concrete as a foundation | substrate provided on the ground. In this state, a gap is formed between the inner peripheral surface of the rotating member 12 and the outer peripheral surface of the structure 14. The structure 14 is formed in a cylindrical shape that tapers upward (the outer diameter gradually decreases).

  The rotating member 12 includes two steel structural members 12A and 12B. The structural members 12 </ b> A and 12 </ b> B are formed in an arc shape in a plan view, and form an annular rotating member 12 in a plan view by joining ends together.

  As shown in the enlarged view of FIG. 4, casters 18 are rotatably provided on the lower surfaces of the structural members 12 </ b> A and 12 </ b> B via a shaft member 34 so as to roll on the upper surface of the foundation 16. A plurality of casters 18 are arranged at equal intervals in the circumferential direction of the rotating member 12.

  As shown in FIG. 6A, which is a view taken along the line B-B of FIGS. 5 and 5, casters 20 that roll on the outer peripheral surface of the structural body 14 are provided on the inner walls of the structural members 12 </ b> A and 12 </ b> B. It is provided so that it can rotate through. A plurality of casters 20 are arranged at equal intervals in the circumferential direction of the rotating member 12.

  The position of the caster 20 with respect to the diametrical direction of the structure 14 can be freely adjusted (arrow 22), whereby an appropriate position around the structure 14 (for example, the central axis of the structure 14 in plan view). The rotation member 12 can be disposed at a position where V and the center of the inner diameter of the rotation member 12 substantially coincide with each other.

  The rotating member 12 is rotatable (movable in the circumferential direction of the structural body 14) with respect to the central axis V of the structural body 14 by casters 18 and 20 provided on the structural members 12A and 12B. Since the rotating member 12 does not move up and down when rotating with respect to the central axis V of the structure 14, the direction in which the caster 20 rolls (arrow 24) is the circumferential direction of the structure 14 (FIG. 6). (See (a)).

  On the outer peripheral surface of the structure 14, grooves 30 and 32 in which wires 26 and 28 are installed from a PC steel as a linear member to be described later are spirally formed. As shown in the perspective view of FIG. 7 (a), the depth of the groove 30 is deeper than the length obtained by adding the depth of the groove 32 and the diameter of the strand 26 of the PC steel. When the PC steel strand 26 and the PC steel strand 28 are installed so as to intersect, as shown in the perspective view of FIG.

  As shown in the plan view of FIG. 8A in which the vicinity of the insertion hole 38 in FIGS. 3 and 3 is enlarged, the insertion hole 38 as a restricting means is provided in the structural members 12A and 12B. As shown in the perspective view of FIG. 9, a plurality of insertion holes 38 are arranged at equal intervals with respect to the circumferential direction of the rotating member 12, and an upper part of the structure 14 in FIGS. 1C and 1C is enlarged. In each insertion hole 38, a PC steel wire 26 is inserted as a linear member whose upper end is fixed to the upper part of the structure 14. In the state shown in FIG. 2 (e) described later, a wire 28 is inserted into each insertion hole 38 from a PC steel as a linear member whose upper end is fixed to the upper part of the structure 14.

  As shown in FIG. 9, at the upper part of the structure 14, from the upper end surface of the notch 40 formed on the upper outer peripheral surface of the structure 14 to the bottom surface of the notch 44 formed on the upper end surface of the structure 14. A penetrating through hole 48 is formed. Then, the upper end portion of the wire 26 is made to pass through the through hole 48, and the upper end portion of the wire 26 of the PC steel is fixed to the structure 14 in the notch 44 by the nut 54 via the bearing plate 52. The upper end portion of the PC steel strand 26 is fixed to the upper portion of the structure 14. FIG. 9 shows an example in which the PC steel strand 26 is fixed to the upper portion of the structure 14 for convenience of explanation, but the PC steel strand 28 is also fixed to the upper portion of the structure 14 by the same method. Is done. That is, the upper end portion of the PC steel strand 28 is inserted into the through hole 50 penetrating from the upper end surface of the notch 42 formed on the upper outer peripheral surface of the structure 14 to the bottom surface of the notch 46 formed on the upper end surface of the structure 14. And is fixed to the structure 14 in the notch 46 by the nut 54 via the bearing plate 52.

  As shown in FIG. 8A, a cylindrical rubber member 56 formed of two rubber materials 56 </ b> A and 56 </ b> B is fixed to the inner wall of the insertion hole 38. Since the PC steel strands 26 and 28 are inserted into the hollow portion of the rubber member 56 (the rubber members 56A and 56B are pressed against the outer peripheral surfaces of the PC steel wires 26 and 28), the structural member 12A is inserted. When the PC steel strands 26 and 28 move upward with respect to 12B, a frictional resistance is generated between the PC steel strands 26 and 28 and the rubber members 56A and 56B. Accordingly, it is possible to apply an appropriate tension to the PC steel strands 26 and 28, and the PC steel strands 26 and 28 are twisted in a slack-free state, so that the PC steel strand 26, 28 can be arranged.

  The insertion hole 38 is formed by a recess 58 formed on the inner peripheral surfaces of the structural members 12A and 12B and a curved portion 60 of the detachable member 64 fixed to the inner peripheral surfaces of the structural members 12A and 12B by bolts 62. Has been. Therefore, as shown in the plan view of FIG. 8B, when the bolt 62 is removed and the PC steel wires 26 and 28 are released from the insertion hole 38 as shown in the plan view of FIG. The PC steel strands 26 and 28 can be moved laterally toward the structure 14.

  The driving means rotates the rotating member 12 with respect to the central axis V of the structure 14 by a power source such as a motor (moves the rotating member 12 in the circumferential direction of the structure 14).

  Next, the construction method of the structure will be described with reference to the elevation views of FIGS. 1 (a) to (c) and FIGS. 2 (d) to (f).

  First, as shown in FIG. 1A and FIG. 9, the upper end portion of the wire 26 is fixed to the structure 14 standing upright on the foundation 16 from PC steel as a linear member. The PC steel stranded wire 26 is disposed in a state of being hung downward from each of the plurality of notches 40 formed on the upper outer peripheral surface of the structure 14 (fixing step).

  Next, as illustrated in FIG. 1B, the rotating member 12 is disposed around the lower portion of the structure 14. That is, the end portions of the structural members 12A and 12B are joined and integrated, and the rotating member 12 is disposed so as to surround the structural body 14 (rotating member disposing step).

  Next, as shown in FIG. 1 (c), the lower end portion of the PC steel strand 26 is inserted into the insertion hole 38 (hollow portion of the rubber member 56) provided in the structural members 12A and 12B constituting the rotating member 12. Insert. After the PC steel wire 26 is inserted into the insertion hole 38, the PC steel wire 26 is pulled downward so that the PC steel wire 26 is properly stretched (linear member insertion step).

  Next, as shown in FIG. 2D, the rotating member 12 is rotated with respect to the central axis V of the structure 14 by the driving means (the rotating member 12 is moved in the circumferential direction of the structure 14). The wire 26 is twisted and the rotation is stopped when a predetermined rotation angle is reached (movement process).

  Thereby, the PC steel wire 26 can be helically arranged around the structure 14 (hereinafter, a method of arranging the PC steel wire 26 around the structure 14 by a fixing step and a moving step). ("Method for arranging linear members"). At the time when the moving process is completed, the PC steel strand 26 is not in contact with the outer peripheral surface of the structure 14. That is, the PC steel strand 26 is in a state of being arranged around the structure 14, but has not yet been installed in the groove 30 formed on the outer peripheral surface of the structure 14.

  When the PC steel strand 26 is twisted, the PC steel strand 26 moves upward with respect to the structural members 12A and 12B. At this time, a frictional resistance is generated between the PC steel strand 26 and the rubber members 56A and 56B, and an appropriate tension is applied to the PC steel strand 26. Thereby, since the strand 26 is twisted in a state without slack, the strand 26 can be arranged in an appropriate spiral shape.

  Next, as shown in the plan view of FIG. 8B, the bolts 62 fixing the detachable members 64 to the inner peripheral surfaces of the structural members 12A and 12B are removed, and the PC steel wires 26 are released from the insertion holes 38. In this state, the lower end of the wire 26 is pulled obliquely downward from the PC steel.

  As a specific method for pulling the lower end portion of the PC steel strand 26 obliquely downward, for example, as shown in FIG. 10A, a lower end portion of the PC steel strand 26 is used by using a connector 68 having a nut 66. And the upper end of the rope 70 (see FIG. 11), the lower end of the rope 70 is inserted into the through-hole 72 formed obliquely in the foundation 16, and the rope 70 is pulled obliquely downward. Good. The through-hole 72 is formed such that the material axes of the PC steel strands 26 and 28 and the center of the through-hole 72 substantially coincide with each other when the PC steel strands 26 and 28 are installed in the grooves 30 and 32. And the magnitude | size of the internal diameter of the through-hole 72 is made as close as possible to the magnitude | size of the outer diameter of the strand 26 of PC steel.

  In this way, by pulling the lower end portion of the PC steel strand 26 obliquely downward, the PC steel strand 26 moves laterally toward the structure 14 as shown in the plan view of FIG. And finally, it installs in the groove | channel 30 formed in the outer peripheral surface of the structure 14 (linear member induction | guidance | derivation process). At this time, the PC steel strand 26 is installed in the groove 30 in a state of being in contact with the inner peripheral surface of the groove 30 (hereinafter, the PC steel is placed on the outer peripheral surface of the structure 14 by the moving process and the linear member guiding process). The process of winding the stranded wire 26 and installing it in the groove 30 is referred to as “installation process”).

  Next, as shown in FIG. 10B, the hydraulic pressure is applied in a state where the lower end portion of the PC steel wire 26 is passed through the through hole 72 that passes through the foundation 16 and the protrusion 74 provided on the lower surface of the foundation 16. A tension is applied to the PC steel wire 26 by a jack or the like, and prestress is introduced in the vertical direction and circumferential direction of the structure 14 (prestress introduction step).

  Next, as shown in FIG. 10 (b), the bottom end of the PC steel strand 26 is placed on the foundation 16 (protrusion 74) in the notch 76 formed in the protrusion 74 by the nut 54 via the bearing plate 52. ) (Fixing process). The lower end portion of the PC steel strand 26 may be fixed to the lower portion of the structure 14.

  Next, as shown in FIG. 2 (e), the fixing process, the rotating member arranging process, and the linear member insertion process performed on the PC steel strand 26 are performed on the PC steel strand 28 as the linear member. Again, in order. In this case, in the fixing process, the PC steel stranded wire 28 is hung downward from each of the plurality of notches 42 formed on the upper outer peripheral surface of the structure 14 so as to be positioned between the notches 40. Be placed.

  Next, as shown in FIG. 2F, the rotating member 12 is rotated with respect to the central axis V of the structure 14 by the driving means (the rotating member 12 is moved in the circumferential direction of the structure 14). The twisted wire 28 is twisted (moving step), and the PC steel wire 28 is spirally arranged around the structure 14.

  The rotation direction (arrow 80) of the rotation member 12 in FIG. 2 (f) is opposite to the rotation direction (arrow 78) of the rotation member 12 in FIG. 2 (d). Thereby, the spiral PC steel strand 26 swung to one side in the circumferential direction of the structure 14 toward the upper side or the lower side, and the helical PC steel strand 28 swung to the other side can be arranged. it can.

  After that, the linear member induction process, the prestress introduction process, and the fixing process performed on the wire 26 from the PC steel are sequentially performed on the wire 28 from the PC steel. Then, after that, the rotating member 12 is divided into structural members 12A and 12B and removed, and the tower-like structure 82 shown in the elevation view of FIG. 12 is constructed.

  Next, the operation and effect of the first embodiment of the present invention will be described.

  In the linear member power generation device 10 and the linear member arrangement method according to the first embodiment, as shown in FIGS. 1A to 1C and FIGS. PC steel strands 26 and 28 can be spirally arranged around the periphery of the steel plate.

  Further, the PC steel strands 26 and 28 can be arranged on the structure 14 without rotating the upright structure 14 to be installed. Therefore, for example, a linear member such as a strand of PC steel can be disposed around a structure that constitutes a main body such as a tower-like structure such as a transmission line tower or a tower for wind power generation or a long pile.

  In the linear member arranging method according to the first embodiment, a plurality of PC steel strands 26 and 28 can be simultaneously spirally arranged around the structure 14 by one rotation of the rotating member 12. This makes it possible to shorten the work time.

  In the arrangement method of the linear members of the first embodiment, the rotating members 12 are rotated around the lower portion of the structure 14 (near the upper surface of the foundation 16), so that the PC steel wires 26 and 28 are placed around the structure 14. It is possible to reduce the height work as much as possible. Therefore, the safety and efficiency of construction can be improved.

  Moreover, in the construction method of the structure of the first embodiment, the structure 14 is constrained in the circumferential direction by wrapping the PC steel strands 26 and 28 around the outer peripheral surface of the structure 14, and the confining effect is exhibited. The Therefore, in comparison with a configuration in which the PC steel wires 26 and 28 are not wound around the outer peripheral surface of the structure 14, a compressive stress is generated due to a compressive stress generation portion of the structure 14 (a bending moment generated in the structure 14. The strength against bending compressive fracture occurring in the portion of the generated structure 14) is improved.

Moreover, prestress is introduced into the up-down direction and the circumferential direction of the structure 14 by applying tension to the wires 26 and 28 from the PC steel.
The bending tensile stress generated due to the bending moment acting on the structure 14 due to an earthquake, wind, or the like is reduced by the vertical prestress introduced into the structure 14. Therefore, compared with a configuration in which no prestress is introduced in the vertical direction, the tensile stress is generated in the structure 14 (the portion of the structure 14 where the tensile stress is generated due to the bending moment generated in the structure 14). This improves the resistance to bending tensile failure and the crack resistance of concrete.

  Further, the structure 14 is further restrained in the circumferential direction by the circumferential prestress introduced into the structure 14, and a high confining effect is exhibited. Therefore, as compared with a configuration in which the PC steel wires 26 and 28 are wound around the outer peripheral surface of the structure 14, the yield strength against bending compression failure generated in the compressive stress generation portion of the structure 14 is further improved.

  As described above, the prestress is introduced in the vertical direction and the circumferential direction of the structure 14 by the PC steel strands 26 and 28 wound around the outer peripheral surface of the structure 14, thereby bending bending fracture strength and bending compression. Both fracture strength improves. That is, it is possible to improve the yield strength against bending fracture caused by the bending moment acting on the structure 14.

  Moreover, the rotation direction of the rotating member 12 when twisting the PC steel strand 26 (arrow 78 in FIG. 2D) and the rotation direction of the rotating member 12 when twisting the PC strand 28 (FIG. 2F). And the arrow 80) in the opposite direction, the spiral PC steel strand 26 swung around the structure 14 in one of the circumferential directions of the structure 14 upward or downward, and the other A swirled spiral PC steel strand 28 can be placed.

  For example, there is only one linear member spirally installed on the outer peripheral surface of the structure 14, or the turning directions of a plurality of linear members spirally installed on the outer peripheral surface of the structure 14 are the same. In other words, the structure 14 may be twisted when a tension force is applied to the linear member. However, the tower-like structure 82 according to the first embodiment is arranged and installed in the structure 14. Since the turning directions of the two linear members (PC steel strands 26 and 28) are different, the twist generated in the structure 14 can be reduced.

  The first embodiment of the present invention has been described above.

  In the first embodiment, the example in which the upper ends of the strands 26 and 28 of the PC steel are fixed to the upper part of the structure 14 is shown. However, other height positions such as a lower part and an intermediate part of the structure 14 are shown. The upper ends of the stranded wires 26 and 28 may be fixed to the PC steel.

  Further, for example, as shown in the linear member arrangement device 128 in FIG. 13, a PC steel strand 26 whose upper end is fixed to the upper portion of the structure 14 and an intermediate portion of the structure 14 (up and down of the structure 14). PC steel strands 26 whose upper ends are fixed to the middle part of the direction may be alternately arranged in the circumferential direction. FIG. 13 shows a state immediately before the twisted wire 26 is twisted.

  In this way, it is possible to increase the number of wires compared to the PC steel disposed in the lower part of the structure body 14 than in the upper part of the structure body 14. Generally, the tower-like structure has a lower moment than the upper part, so that the PC steel wire can be efficiently arranged around the structure 14.

  Further, for example, as shown in the linear member arranging device 130 in FIG. 14, two rotating members 12 are arranged up and down around the lower portion of the structure body 14 (hereinafter, the rotating member 12 arranged below is “rotated”. A rotating member 12 disposed above the rotating member 84 is referred to as a “rotating member 86”), and a PC steel strand 26 having an upper end fixed to the top of the structure 14 is provided on the rotating member 84. Alternatively, the PC steel wire 26 having an upper end fixed to the intermediate portion of the structure 14 may be inserted into the insertion hole 38 provided in the rotating member 86.

  In this way, by varying the rotation angle between the rotating member 84 and the rotating member 86, the PC steel strand 26 whose upper end is fixed to the upper part of the structure 14 and the intermediate part of the structure 14 are arranged. The inclination angle of the PC steel strand 26 with the upper end fixed can be made different. For convenience of explanation, the grooves 30 and 32 and notches formed in the structure 14 for the PC steel strand 28 are omitted in FIGS.

  In the first embodiment, an example in which six PC steel strands 26 and six PC steel strands 28 are installed in the grooves 30 and 32 formed in the structure 14 is shown. The number of the stranded wires 26 and 28, the arrangement interval of the PC steel stranded wires 26 and 28 with respect to the circumferential direction of the structure 14, and the rotation angle of the rotating member 12 are appropriately determined according to the strength and workability required of the structure 14. Just decide.

  Further, in the first embodiment, an example of the rotation mechanism in which the rotation member 12 is rotated by the caster 18 that rolls on the upper surface of the foundation 16 is shown. However, the rotation member 12 is in relation to the central axis V of the structure 14. Any mechanism that can rotate is acceptable. For example, the rotating member 12 may be rotated by a rotating mechanism 88 as shown in the perspective view of FIG.

  In the rotation mechanism 88, an annular support member 90 is fixed around the lower portion of the structure 14, and a sliding plate 92 is pasted on the upper surface of the support member 90. Then, on the upper surface of the sliding plate 92, the rotating member 12 having the sliding plate 94 attached on the lower surface is placed. As a result, the rotating member 12 (sliding plate 94) slides on the upper surface of the sliding plate 92 and rotates about the central axis V of the structure 14. The sliding plate 92 may be installed directly on the foundation 16.

Next, a second embodiment of the present invention will be described.
In the description of the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and are appropriately omitted.

  As shown in the elevation view of FIG. 16, in the linear member arranging device 132 according to the second embodiment, two rotating members 84 and 86 are arranged vertically around the lower portion of the structure 14. Further, a PC steel strand 26 having an upper end fixed to the upper portion of the structure 14 is inserted into an insertion hole 38 provided in the rotating member 84, and a PC steel strand having an upper end fixed to the upper portion of the structure 14 is inserted. 28 is inserted through an insertion hole 38 provided in the rotating member 86.

  Then, during the moving process, the two rotating members 84 and 86 are rotated in opposite directions with respect to the central axis V of the structure 14 (moved in directions opposite to each other with respect to the circumferential direction of the structure 14). In FIG. 16, the rotation direction of the rotation member 84 is indicated by an arrow 96, and the rotation direction of the rotation member 86 is indicated by an arrow 98.

  Next, the operation and effect of the second embodiment of the present invention will be described.

  In the second embodiment, as shown in FIG. 16, the two rotating members 84 and 86 arranged vertically are rotated in opposite directions with respect to the central axis V of the structure 14 (in the circumferential direction of the structure 14). The spiral PC steel wire 26 swung to one side in the circumferential direction of the structure 14 toward the upper side or the lower side, and the helical PC steel swirled to the other side. Line 28 can be placed and placed on structure 14.

  For example, when the prestress is introduced in the vertical direction and the circumferential direction of the structure 14 by the prestress introduction process described in the first embodiment, the linear member spirally installed on the outer peripheral surface of the structure 14 is 1 If the turning direction of all the linear members spirally installed on the outer peripheral surface of the structure 14 is the same, the structure 14 is twisted when a tension force is applied to the linear member. However, in the second embodiment, the two linear members (PC steel strands 26 and 28) arranged in the structure 14 have different turning directions, so that the twist generated in the structure 14 is prevented. Can be reduced.

  The second embodiment of the present invention has been described above.

  In the second embodiment, the example in which the two rotating members 84 and 86 are arranged up and down around the lower portion of the structure 14 is shown, but three or more rotating members may be arranged in the up and down direction. Two or more rotating members may be arranged concentrically around the central axis V of the structure 14.

Next, a third embodiment of the present invention will be described.
In the description of the third embodiment, components having the same configurations as those of the first embodiment are denoted by the same reference numerals, and are appropriately omitted.

  As shown in the elevation view of FIG. 17, in the linear member arranging device 134 of the third embodiment, the rotating member 84 is arranged around the lower portion of the structure 14, and the rotating member 86 is an intermediate portion of the structure 14. It arrange | positions around (around the intermediate part of the structure 14 with respect to an up-down direction). Further, the same PC steel wires 26 and 28 are inserted into the insertion hole 38 provided in the rotation member 84 and the insertion hole 38 provided in the rotation member 86, which are positioned in a straight line in front view ( FIG. 17 shows an example in which the same PC steel wire 26 is inserted into the insertion hole 38 of the rotating members 84 and 86).

  Next, operations and effects of the third exemplary embodiment of the present invention will be described.

  In the third embodiment, as shown in FIG. 17, the PC steel strands 26 and 28 can be arranged in various spiral shapes by adjusting the rotation angles of the plurality of rotating members 84 and 86. Further, since the PC steel strands 26 and 28 are regulated at a plurality of locations in the vertical direction, the PC steel strands 26 and 28 can be accurately arranged around the structure 14.

  Heretofore, the third embodiment of the present invention has been described.

  In the third embodiment, the example in which the two rotating members 84 and 86 are arranged up and down around the lower portion of the structure 14 is shown. However, three or more rotating members may be arranged in the up and down direction.

  The first to third embodiments of the present invention have been described above.

  In the first to third embodiments, the structure 14 is made of reinforced concrete. However, the structure 14 may be formed of precast concrete or in-situ concrete.

  The structure 14 may be formed of reinforced concrete or unreinforced concrete with a small amount of reinforcing bars. Moreover, you may form with concrete other than reinforced concrete. For example, the structure 14 may be formed of fiber reinforced concrete having steel fibers, carbon fibers, or the like, and the reinforcing bars provided in the structure 14 may be reduced or eliminated. If the structure 14 is made unreinforced, it is possible to prevent a decrease in durability of the concrete caused by rust generated in the reinforcing bars.

  Moreover, in the 1st-3rd embodiment, although the example which made the linear member the strands 26 and 28 from PC steel was shown, if a linear member is a linear member to which tension force can be applied reliably, Good. It is preferable to use PC steel materials such as PC steel strand and PC steel wire.

  In the first to third embodiments, friction resistance is generated between the rubber member 56 (rubber materials 56A and 56B) fixed to the inner wall of the insertion hole 38 and the PC steel strands 26 and 28, and the PC Although the example which gives appropriate tension to steel strands 26 and 28 was shown, if the proper tension can be given to wires 26 and 28 from PC steel by the dead weight of PC steel wires 26 and 28, rubber member 56 may not be provided.

  If the PC steel strands 26 and 28 are not sufficiently tensioned by the wind, or if the slack of the PC steel strands 26 and 28 hinders proper shape arrangement A means for applying tension to the stranded wires 26 and 28 of the PC steel like the rubber member 56 is effective.

  As a means for applying tension to the PC steel strands 26 and 28, in addition to the rubber member 56, for example, a method of attaching the weight 100 below the PC steel strands 26 and 28 as shown in the enlarged view of FIG. As shown in a method of pulling the wires 26 and 28 downward from the PC steel by an urging means such as a spring or a linear member arrangement device 136 in FIG. A method of fixing the stranded wires 26 and 28 of PC steel can be mentioned.

  In the method of FIG. 19, since the PC steel strands 26 and 28 are fixed to the insertion hole 38, when the PC steel strands 26 and 28 are twisted, the rotating member 12 moves upward while rotating. Therefore, the direction in which the caster 20 rolls at this time (arrow 24) is an oblique direction (circumferential direction of the structure 14), as shown in FIG. And an angle 24 between the arrow 24).

  Moreover, in the 1st-3rd embodiment, although the example which made the base | substrate 16 the foundation provided on the ground was shown, it is not restricted to this, For example, a seabed via a structure, the rooftop of a building, a pile, etc. A structure that is supported on the ocean and disposed on the ocean, or a structure that floats on the ocean may be used as a base.

  In the first to third embodiments, the example in which the PC steel strands 26 and 28 are installed in the grooves 30 and 32 formed on the outer peripheral surface of the structure 14 is shown. The grooves 30 and 32 do not have to be formed. In this case, the state in which the PC steel strands 26 and 28 are arranged in contact with the outer peripheral surface of the structure 14 is the state in which the PC steel strands 26 and 28 are installed on the outer peripheral surface of the structure 14.

  Moreover, when installing the PC steel strands 26 and 28 in the structure 14 in which the grooves 30 and 32 are not formed on the outer peripheral surface, the PC steel strands 26 and 28 are the structures after the linear member insertion process is completed. 14 is placed in contact with the outer peripheral surface of the steel plate 14 and a moving process is performed in this state (the PC steel stranded wires 26 and 28 are rubbed against the outer peripheral surface of the structure 14 and the PC steel stranded wires 26 and 28 are twisted). ), The installation of the stranded steel wires 26 and 28 on the outer peripheral surface of the structure 14 may be completed simultaneously with the completion of the moving process. In this way, the linear member guiding process can be omitted.

  Further, the driving means of the first to third embodiments can rotate the rotating member 12 with respect to the central axis V of the structure 14 (move the rotating member 12 in the circumferential direction of the structure 14). The rotating member 12 may be rotated by human power. For example, driving devices 104, 106, and 108 as shown in FIGS.

  As shown in FIG. 20, in the driving device 104, a belt 112 is wound around a wheel 110 and a belt wheel 114 fixed on the upper surface of the rotating member 12, and the belt wheel 114 is rotated by a motor 116 to rotate the rotating member 12 ( The wheel 110) is rotated.

  As shown in FIG. 21, in the driving device 106, the driving gear 120 is engaged with an annular driven gear 118 fixed to the upper surface of the rotating member 12, and the driving gear 120 is rotated by a motor 116, thereby rotating the rotating member 12 ( The driven gear 118) is rotated.

  As shown in FIG. 22, in the drive device 108, the wire 124 is wound around the wheel 122 fixed to the upper surface of the rotating member 12 a plurality of times, and the rotating member 12 (the wheel 122) is rotated by pulling the wire 124 by the winch 126. .

  Moreover, since the linear member can be arrange | positioned around this structure, without rotating the upright structure used as installation object in the 1st-3rd embodiment, in the construction field, a pillar, a pile, wind power, etc. Applicable to structures that constitute the main body of towers such as power generation towers, chimneys, power transmission line towers, airfield control towers, TV towers, tower-like buildings, etc., and structures that make it difficult to rotate the main body It is especially effective for things.

  In the first to third embodiments, an example of the structure 14 standing upright on the foundation 16 has been shown. However, in the first to third embodiments, “standing upright on the foundation 16” means “ Standing on the foundation 16 ”. That is, the structure 14 may be erected on the foundation 16 so that the axis of the structure 14 is vertical, or the structure 14 is erected on the foundation 16 so that the axis of the structure 14 is inclined. It may be.

  In addition, in the reinforcement work to improve the compression strength and bending strength of the column by installing the linear member on the existing column, the first to third implementations are performed when the linear member is arranged around the column main body. Forms can be applied.

  In addition, the expression “spiral” used in the description of the embodiment of the present invention generally refers to a spiral space curve that is formed when advancing at a constant speed in the axial direction while rotating on a cylindrical surface. Meaning, twisting of the arrangement shape of the grooves 30 and 32 formed on the outer peripheral surface of the structure 14 and the arrangement shape of the linear members (PC steel strands 26 and 28) installed in the grooves 30 and 32 May be less than 360 degrees in plan view. That is, the linear members (PC steel strands 26 and 28) extend in the vertical direction of the structure 14 and are circumferential so that prestress is introduced in the vertical direction and the circumferential direction with respect to the structure 14. As long as it is installed at an angle.

  The first to third embodiments of the present invention have been described above, but the present invention is not limited to such embodiments, and the first to third embodiments may be used in combination. Needless to say, the present invention can be implemented in various modes without departing from the gist of the present invention.

10, 128, 130, 132, 134, 136 Linear member placement device 12, 84, 86 Rotating member 14 Structure 16 Foundation (base)
26, 28 PC steel stranded wire (linear member)
38 Insertion hole (regulation means)
82 Tower-like structure 104, 106, 108 Driving device (driving means)

Claims (7)

A rotating member disposed around an upright structure and movable in the circumferential direction of the structure;
Restricting means through which a lower end of a linear member provided on the rotating member and having an upper end fixed to the structure is inserted;
Drive means for moving the rotating member in the circumferential direction of the structure;
An apparatus for arranging linear members.   The linear member arrangement device according to claim 1, wherein the two rotating members move in the opposite directions with respect to the circumferential direction of the structure.   The linear member arrangement device according to claim 1, wherein the same linear member is inserted into the regulating means provided in the plurality of rotating members arranged in the vertical direction. A fixing step of fixing the upper end portion of the linear member to the upright structure;
A moving step of moving the lower end of the linear member in the circumferential direction of the structure;
Arrangement method of linear member which has. A fixing step of fixing the upper end portion of the linear member to a structure standing upright on the base;
An installation step of moving the lower end portion of the linear member in the circumferential direction of the structure and winding the linear member around the outer peripheral surface of the structure;
A prestress introduction step of applying a prestress in the vertical direction and circumferential direction of the structure by applying tension to the wound linear member;
A fixing step of fixing a lower end portion of the linear member to a lower portion of the base or the structure;
A method of constructing a structure having   The tower-like structure which has the said structure by which the said linear member was arrange | positioned by the arrangement | positioning method of the linear member of Claim 4.   A tower-like structure constructed by the structure construction method according to claim 5.

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