JP2005048405A - Tendon and its manufacturing method - Google Patents

Tendon and its manufacturing method Download PDF

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Publication number
JP2005048405A
JP2005048405A JP2003204911A JP2003204911A JP2005048405A JP 2005048405 A JP2005048405 A JP 2005048405A JP 2003204911 A JP2003204911 A JP 2003204911A JP 2003204911 A JP2003204911 A JP 2003204911A JP 2005048405 A JP2005048405 A JP 2005048405A
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Prior art keywords
pipe
steel material
tension
thermoplastic pipe
adjacent
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JP2003204911A
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JP3653268B2 (en
Inventor
Kunihiko Narisawa
邦彦 成沢
Haruji Hirose
晴次 広瀬
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Kyokuto Kogen Concrete Shinko Co Ltd
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Kyokuto Kogen Concrete Shinko Co Ltd
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    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B5/00—Making ropes or cables from special materials or of particular form
    • D07B5/005—Making ropes or cables from special materials or of particular form characterised by their outer shape or surface properties
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/16—Ropes or cables with an enveloping sheathing or inlays of rubber or plastics
    • D07B1/162—Ropes or cables with an enveloping sheathing or inlays of rubber or plastics characterised by a plastic or rubber enveloping sheathing
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B1/00—Constructional features of ropes or cables
    • D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
    • D07B1/0693—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a strand configuration
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/10—Rope or cable structures
    • D07B2201/1004—General structure or appearance
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/10—Rope or cable structures
    • D07B2201/1024—Structures that change the cross-sectional shape
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2201/00—Ropes or cables
    • D07B2201/20—Rope or cable components
    • D07B2201/2083—Jackets or coverings
    • D07B2201/2084—Jackets or coverings characterised by their shape
    • D07B2201/2086—Jackets or coverings characterised by their shape concerning the external shape
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2207/00—Rope or cable making machines
    • D07B2207/40—Machine components
    • D07B2207/404—Heat treating devices; Corresponding methods
    • D—TEXTILES; PAPER
    • D07—ROPES; CABLES OTHER THAN ELECTRIC
    • D07B—ROPES OR CABLES IN GENERAL
    • D07B2501/00—Application field
    • D07B2501/20—Application field related to ropes or cables
    • D07B2501/2015—Construction industries
    • D07B2501/203—Bridges

Landscapes

  • Bridges Or Land Bridges (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Ropes Or Cables (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tension structure between bridge piers capable of preventing the occurrence of noises resulting from a collision between a PC steel material and a PE pipe and to provide its construction method. <P>SOLUTION: The tendon is so constituted that an abutting section 3 abutting the inner circumference on the PC steel material 1 is formed in the PE (polyethylene) pipe 2 inserting the PC steel material 1(PC steel strand and PC steel wire or the like) therein. The abutting section 3 makes the diameter of the PE pipe 2 as a thermoplastic pipe smaller by heating molding of the PE pipe, it is a place abutting the inner circumference of the PE pipe on the PC steel material 1 so that a plurality of places can be formed at predetermined intervals. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、耐震性を向上させるために隣り合う橋脚間および隣り合う橋脚とアバットとの間に張設する緊張材およびその製造方法に関し、特に熱可塑性パイプに挿入した状態で隣り合う橋脚間および隣り合う橋脚とアバットとの間に張設する緊張材およびその製造方法に関する。
【０００２】
【従来の技術】
図５は、橋脚間緊張構造の構成を示す側面図であり、図６は、図５に示す定着装置付近の構成を示す断面図である。
アバット１０および橋脚２０に橋桁３０を乗せた河川用の橋や高速道路用の橋に地震等により水平力が作用すると、橋脚２０の損壊のみならず、隣り合うアバット１０と橋脚２０との間および隣り合う橋脚２０間の固有周期に違いがある場合には、隣り合うアバット１０と橋脚２０および隣り合う橋脚２０は、異なった位相で振動することになって、橋桁３０が落橋するという被害をもたらす可能性がある。
【０００３】
そこで、従来、図５に示すように、隣り合うアバット１０と橋脚２０との間および隣り合う橋脚２０間に緊張材４０を張設する橋脚間緊張構造を用いることによって、隣り合うアバット１０と橋脚２０および隣り合う橋脚２０の間隔が拡がることを防ぎ、橋桁３０の落下を防止することが行われている。
【０００４】
このような橋脚間緊張構造に用いられる緊張材４０は、図６に示すように、ＰＣ鋼より線、ＰＣ鋼線等からなるＰＣ鋼材１と、ＰＣ鋼材１がアバット１０および橋脚２０に接触して傷つくことや雨水等によるＰＣ鋼材１の腐食を防止するためのＰＥパイプ２（例えば、特許文献１参照）とからなり、ＰＣ鋼材１がＰＥパイプ２に挿入された状態で張設されている。ＰＣ鋼材１は、アバット１０および橋脚２０に設けられた定着装置５０によって両端部がそれぞれ定着され、ＰＥパイプ２は、サポートチューブ６０内に設けられたパイプ定着装置６１によって一端部のみが定着されている。また、隣り合うアバット１０と橋脚２０との間および隣り合う橋脚２０間に架設したＰＣ鋼材１を緊張させる必要があるため、ＰＥパイプ２の内径は、ＰＣ鋼材１の直径よりも大きく、ＰＣ鋼材１とＰＥパイプ２との間には、間隙が存在する構造になっている。なお、図７には、アバット１０に設けられた定着装置５０、サポートチューブ６０およびパイプ定着装置６１の一例を示している。
【０００５】
【特許文献１】
特開平８−２１８２８６号公報
【０００６】
【発明が解決しようとする課題】
しかしながら、従来技術では、ＰＣ鋼材１とＰＥパイプ２との間には、間隙が存在するため、風等の外力によるＰＥパイプ２の振動によって、緊張材であるＰＣ鋼材１と熱可塑性パイプであるＰＥパイプ２とが衝突し、騒音が発生してしまうという問題点があった。
【０００７】
本発明は斯かる問題点を鑑みてなされたものであり、その目的とするところは、ＰＣ鋼材と熱可塑性パイプとの衝突よる騒音を防止することができる緊張材およびその製造方法を提供する点にある。
【０００８】
【課題を解決するための手段】
本発明は上記課題を解決すべく、以下に掲げる構成とした。
請求項１記載の発明の要旨は、隣り合う橋脚間もしくは隣り合う橋脚とアバットとの間に張設する緊張材であって、ＰＣ鋼材と、該ＰＣ鋼材が挿入され、前記ＰＣ鋼材の直径よりも内径が大きい熱可塑性パイプとからなり、前記熱可塑性パイプには、内周が前記ＰＣ鋼材に当接している当接部が形成されていることを特徴とする緊張材に存する。
また請求項２記載の発明の要旨は、前記当接部は、前記熱可塑性パイプが加熱成型によって縮径されていることを特徴とする請求項１記載の緊張材に存する。
また請求項３記載の発明の要旨は、前記当接部は、所定間隔毎に形成されていることを特徴とする請求項１又は２記載の緊張材に存する。
また請求項４記載の発明の要旨は、前記当接部に挟まれている箇所の内の一部もしくは全部には、前記ＰＣ鋼材と前記熱可塑性パイプとの間隙に発泡ウレタンが充填されていることを特徴とする請求項３記載の緊張材に存する。
また請求項５記載の発明の要旨は、隣り合う橋脚間もしくは隣り合う橋脚とアバットとの間に張設する緊張材の製造方法であって、隣り合うアバットと橋脚との距離もしくは隣り合う橋脚間の距離に応じてＰＣ鋼材と熱可塑性パイプとを切断する工程と、前記ＰＣ鋼材を前記熱可塑性パイプに挿入する工程と、前記熱可塑性パイプを加熱成型することによって前記熱可塑性パイプの内周が前記ＰＣ鋼材に当接する当接部を形成する工程とを有することを特徴とする緊張材の製造方法に存する。
【０００９】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて詳細に説明する。
【００１０】
図１は、本発明に係る緊張材の実施の形態の構成を示す斜視図であり、図２は、本発明に係る緊張材の実施の形態の構成を示す縦断面図であり、図３は、本発明に係る緊張材の実施の形態の構成を示す横断面図である。
【００１１】
本実施の形態の緊張材は、図１および図２を参照すると、ＰＣ鋼より線、ＰＣ鋼線等からなるＰＣ鋼材１と、ＰＣ鋼材１が挿入され、内径がＰＣ鋼材１の直径よりも大きいＰＥ（ポリエチレン）パイプ２とからなり、ＰＥパイプ２には、内周がＰＣ鋼材１に当接している当接部３が形成されている。
【００１２】
当接部３は、熱可塑性パイプであるＰＥパイプ２を加熱成型することによって縮径させ、ＰＥパイプ２の内周とＰＣ鋼材１とが当接させた箇所であり、所定の間隔で複数箇所形成されている。すなわち、当接部３以外の箇所では、図３（Ａ）に示すように、ＰＥパイプ２の内周とＰＣ鋼材１との間に間隙が存在し、当接部３では、図３（Ｂ）に示すように、ＰＥパイプ２の内周とＰＣ鋼材１とが当接している。
【００１３】
なお、図１および図２に示す例では、当接部３は、等間隔で結成されているが、当接部３の長さや形成間隔は、ＰＥパイプ２の力学特性に応じて適宜設定すれば良い。すなわち、ＰＥパイプ２が振動によってＰＣ鋼材１に衝突しない範囲で当接部３の長さや形成間隔を適宜設定すれば良い。
【００１４】
また、当接部３以外の箇所、すなわちＰＥパイプ２の内周とＰＣ鋼材１との間に間隙が存在する隣り合う当接部３に挟まれている箇所には、図２に示すように、発砲ウレタン４が充填されている。発砲ウレタン４の充填は、当接部３に挟まれている全ての箇所に行っても良く、また、所定間隔毎に行うようにしても良い。
【００１５】
なお、本実施の形態では、当接部３において、ＰＣ鋼材１とＰＥパイプ２とが当接し、発砲ウレタン４の充填箇所において、ＰＣ鋼材１と充填された発砲ウレタン４とが密着することになるが、ＰＣ鋼材１とＰＥパイプ２および発砲ウレタン４とは、強固に接着されているわけではないため、隣り合うアバット１０と橋脚２０との間および隣り合う橋脚２０間に架設したＰＣ鋼材１を緊張させる際に、ＰＣ鋼材１の緊張に伴ってＰＥパイプ２が変形することはない。
【００１６】
次に、本実施の形態の緊張材の製造方法について図４を参照して詳細に説明する。
図４は、本発明に係る緊張材の実施の形態の製造方法を説明するための工程図である。
【００１７】
まず、緊張材を張設する場所、すなわち隣り合うアバット１０と橋脚２０との距離もしくは隣り合う橋脚２０間の距離に応じてＰＣ鋼材１とＰＥパイプ２とを切断する（ステップＡ１、Ａ２）。なお、ＰＣ鋼材１は、図５に示すように、橋脚２０を貫通する様に張設されると共に、図示しないジャッキによって緊張させるために必要な長さが必要になるため、これらの長さを加味してＰＥパイプ２よりも長く切断する。
【００１８】
次にＰＥパイプ２にＰＣ鋼材１を挿入する（ステップＡ３）。定着および図示しないジャッキによる緊張動作のために、ＰＣ鋼材１の両端部がＰＥパイプ２から露出するようにＰＣ鋼材１をＰＥパイプ２に挿入する。
【００１９】
次に、熱可塑性を有するＰＥパイプ２を６０〜７０℃に加熱して成型することにより、ＰＥパイプ２を縮径させて当接部３を形成する（ステップＡ４）。加熱成型には、例えば、発熱体が内蔵された一対の板によってＰＥパイプ２をはさむことができるはさみ状の治具等を使用することができる。
【００２０】
次に、ＰＥパイプ２に錐等で穴を開け、当該穴から発泡ウレタンをＰＣ鋼材１とＰＥパイプ２との間隙に充填し（ステップＡ５）、穴をパテ等で閉じる。このようにして製造した緊張材を巻き回して現場に搬送する。
【００２１】
以上説明したように、本実施の形態によれば、ＰＥパイプ２に当接部３を形成し、当接部３でＰＣ鋼材１とＰＥパイプ２の内周とが当接した状態にすることにより、ＰＣ鋼材１とＰＥパイプ２との衝突よる騒音を防止することができるという効果を奏する。
【００２２】
さらに、本実施の形態によれば、ＰＥパイプ２の内周とＰＣ鋼材１との間に発砲ウレタン４の充填することにより、ＰＥパイプ２の当接部３が計時変化によって拡がって、当接部３においてＰＣ鋼材１とＰＥパイプ２の内周との間に間隙が生じた場合にも、ＰＥパイプ２の内周とＰＣ鋼材１との間に充填された発砲ウレタン４によって、ＰＣ鋼材１とＰＥパイプ２との衝突よる騒音を防止することができるという効果を奏する。
【００２３】
なお、本発明が上記各実施の形態に限定されず、本発明の技術思想の範囲内において、各実施の形態は適宜変更され得ることは明らかである。また、上記構成部材の数、位置、形状等は上記実施の形態に限定されず、本発明を実施する上で好適な数、位置、形状等にすることができる。なお、各図において、同一構成要素には同一符号を付している。
【００２４】
【発明の効果】
本発明の緊張材およびその製造方法は、ＰＣ鋼材が挿入されている熱可塑性パイプに当接部を形成し、当接部でＰＣ鋼材と熱可塑性パイプとが当接した状態にすることにより、ＰＣ鋼材と熱可塑性パイプとの衝突よる騒音を防止することができるという効果を奏する。
【００２５】
さらに、本発明の緊張材およびその製造方法は、熱可塑性パイプの内周とＰＣ鋼材との間に発砲ウレタンの充填することにより、熱可塑性パイプの当接部が計時変化によって拡がって、当接部においてＰＣ鋼材と熱可塑性パイプの内周との間に間隙が生じた場合にも、熱可塑性パイプの内周とＰＣ鋼材との間に充填された発砲ウレタンによって、ＰＣ鋼材と熱可塑性パイプとの衝突よる騒音を防止することができるという効果を奏する。
【図面の簡単な説明】
【図１】本発明に係る緊張材の実施の形態の構成を示す斜視図である。
【図２】本発明に係る緊張材の実施の形態の構成を示す縦断面図である。
【図３】本発明に係る緊張材の実施の形態の構成を示す横断面図である。
【図４】本発明に係る緊張材の実施の形態の製造方法を説明するための工程図である。
【図５】橋脚間緊張構造の構成を示す側面図である。
【図６】図５に示す定着装置付近の構成を示す断面図である。
【符号の説明】
１ ＰＣ鋼材
２ ＰＥ（ポリエチレン）パイプ
３ 当接部
４ 発砲ウレタン
１０ アバット
２０ 橋脚
３０ 橋桁
４０ 緊張材
５０ 定着装置
６０ サポートチューブ
６１ パイプ定着装置[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tension member stretched between adjacent piers and between adjacent piers and an abutment for improving seismic resistance, and a method for manufacturing the same, and more particularly, between adjacent piers inserted in a thermoplastic pipe and The present invention relates to a tension member stretched between adjacent bridge piers and abutments and a method for manufacturing the same.
[0002]
[Prior art]
5 is a side view showing the configuration of the tension structure between piers, and FIG. 6 is a cross-sectional view showing the configuration in the vicinity of the fixing device shown in FIG.
When a horizontal force acts on a river bridge or a highway bridge with bridge girder 30 on abut 10 and pier 20 due to an earthquake or the like, not only damage to pier 20 but also between adjacent abut 10 and pier 20 and When there is a difference in the natural period between the adjacent piers 20, the adjacent abutment 10, the pier 20, and the adjacent pier 20 vibrate at different phases, causing damage that the bridge girder 30 is dropped. there is a possibility.
[0003]
Therefore, conventionally, as shown in FIG. 5, by using an abutment tension structure in which a tension member 40 is stretched between adjacent abutments 10 and piers 20 and between adjacent piers 20, adjacent abutments 10 and piers are used. 20 and the space | interval of the adjacent bridge pier 20 are prevented from expanding, and falling of the bridge girder 30 is performed.
[0004]
As shown in FIG. 6, the tension member 40 used in such an inter-pier tension structure has a PC steel material 1 made of a PC steel wire, a PC steel wire, etc., and the PC steel material 1 contacts the abutment 10 and the pier 20. It is composed of a PE pipe 2 (for example, see Patent Document 1) for preventing corrosion of the PC steel material 1 due to damage or rainwater, and the PC steel material 1 is stretched in a state of being inserted into the PE pipe 2. . Both ends of the PC steel material 1 are fixed by fixing devices 50 provided on the abutment 10 and the pier 20, and only one end of the PE pipe 2 is fixed by a pipe fixing device 61 provided in the support tube 60. Yes. Moreover, since it is necessary to tension the PC steel material 1 constructed between the adjacent abutment 10 and the pier 20 and between the adjacent pier 20, the inner diameter of the PE pipe 2 is larger than the diameter of the PC steel material 1. A gap exists between 1 and the PE pipe 2. FIG. 7 shows an example of the fixing device 50, the support tube 60, and the pipe fixing device 61 provided in the abut 10.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 8-218286
[Problems to be solved by the invention]
However, in the prior art, since there is a gap between the PC steel material 1 and the PE pipe 2, the PC steel material 1 and the thermoplastic pipe, which are tension materials, are caused by the vibration of the PE pipe 2 due to an external force such as wind. There was a problem that the PE pipe 2 collided and noise was generated.
[0007]
The present invention has been made in view of such problems, and an object of the present invention is to provide a tension material that can prevent noise caused by a collision between a PC steel material and a thermoplastic pipe, and a method for manufacturing the same. It is in.
[0008]
[Means for Solving the Problems]
In order to solve the above problems, the present invention has the following configuration.
The gist of the invention described in claim 1 is a tension member stretched between adjacent piers or between adjacent piers and an abut, wherein the PC steel material and the PC steel material are inserted, and from the diameter of the PC steel material And a thermoplastic pipe having a large inner diameter, and the thermoplastic pipe is a tension material characterized in that a contact portion whose inner periphery is in contact with the PC steel material is formed.
The gist of the invention according to claim 2 resides in the tension material according to claim 1, wherein the diameter of the abutment portion is reduced by heat molding of the thermoplastic pipe.
The gist of the invention described in claim 3 resides in the tendon according to claim 1 or 2, wherein the contact portion is formed at predetermined intervals.
According to a fourth aspect of the present invention, urethane foam is filled in a gap between the PC steel material and the thermoplastic pipe in a part or all of the portion sandwiched between the contact portions. It exists in the tension material of Claim 3 characterized by the above-mentioned.
The gist of the invention described in claim 5 is a method of manufacturing a tension member stretched between adjacent piers or between adjacent piers and abutments, and the distance between adjacent abutments and piers or between adjacent piers. A step of cutting the PC steel material and the thermoplastic pipe according to the distance, a step of inserting the PC steel material into the thermoplastic pipe, and an inner periphery of the thermoplastic pipe by thermoforming the thermoplastic pipe. And a step of forming an abutting portion that abuts against the PC steel material.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0010]
FIG. 1 is a perspective view showing the configuration of the embodiment of the tendon according to the present invention, FIG. 2 is a longitudinal sectional view showing the configuration of the embodiment of the tendon according to the present invention, and FIG. It is a cross-sectional view which shows the structure of embodiment of the tendon which concerns on this invention.
[0011]
With reference to FIGS. 1 and 2, the tension member of the present embodiment is inserted with a PC steel material 1 made of a PC steel wire, a PC steel wire, and the like, and a PC steel material 1, and the inner diameter is larger than the diameter of the PC steel material 1. The PE pipe 2 is formed with a contact portion 3 whose inner periphery is in contact with the PC steel material 1.
[0012]
The contact portion 3 is a portion where the inner diameter of the PE pipe 2 and the PC steel material 1 are brought into contact with each other by heat molding the PE pipe 2 which is a thermoplastic pipe. Is formed. That is, as shown in FIG. 3 (A), there is a gap between the inner circumference of the PE pipe 2 and the PC steel material 1 at a place other than the contact portion 3. ), The inner circumference of the PE pipe 2 and the PC steel material 1 are in contact with each other.
[0013]
In the example shown in FIGS. 1 and 2, the contact portions 3 are formed at equal intervals. However, the length and the formation interval of the contact portions 3 are appropriately set according to the mechanical characteristics of the PE pipe 2. It ’s fine. That is, the length and the formation interval of the contact portion 3 may be set as appropriate as long as the PE pipe 2 does not collide with the PC steel material 1 due to vibration.
[0014]
Moreover, in a place other than the contact part 3, that is, a part sandwiched between adjacent contact parts 3 in which a gap exists between the inner periphery of the PE pipe 2 and the PC steel material 1, as shown in FIG. The foaming urethane 4 is filled. The foaming urethane 4 may be filled in all the portions sandwiched between the contact portions 3 or at predetermined intervals.
[0015]
In the present embodiment, the PC steel material 1 and the PE pipe 2 are in contact with each other at the contact portion 3, and the PC steel material 1 and the filled urethane 4 are in close contact with each other at the filling location of the foaming urethane 4. However, since the PC steel material 1 and the PE pipe 2 and the foamed urethane 4 are not firmly bonded, the PC steel material 1 installed between the adjacent abut 10 and the pier 20 and between the adjacent piers 20. When the PC steel material 1 is tensioned, the PE pipe 2 is not deformed.
[0016]
Next, the manufacturing method of the tendon material of this Embodiment is demonstrated in detail with reference to FIG.
FIG. 4 is a process diagram for explaining the manufacturing method of the embodiment of the tendon according to the present invention.
[0017]
First, the PC steel material 1 and the PE pipe 2 are cut according to the place where the tension material is stretched, that is, the distance between the adjacent abut 10 and the pier 20 or the distance between the adjacent piers 20 (steps A1 and A2). As shown in FIG. 5, the PC steel material 1 is stretched so as to penetrate the pier 20 and requires a length necessary for tensioning with a jack (not shown). In consideration, it cuts longer than PE pipe 2.
[0018]
Next, the PC steel material 1 is inserted into the PE pipe 2 (step A3). The PC steel material 1 is inserted into the PE pipe 2 so that both ends of the PC steel material 1 are exposed from the PE pipe 2 for fixing and tensioning operation by a jack (not shown).
[0019]
Next, the PE pipe 2 having thermoplasticity is heated to 60 to 70 ° C. and molded, thereby reducing the diameter of the PE pipe 2 and forming the contact portion 3 (step A4). For the heat molding, for example, a scissors-like jig or the like that can sandwich the PE pipe 2 with a pair of plates with built-in heating elements can be used.
[0020]
Next, a hole is formed in the PE pipe 2 with a cone or the like, urethane foam is filled into the gap between the PC steel material 1 and the PE pipe 2 from the hole (step A5), and the hole is closed with a putty or the like. The tension material thus manufactured is wound and transported to the site.
[0021]
As described above, according to the present embodiment, the contact portion 3 is formed on the PE pipe 2, and the PC steel material 1 and the inner periphery of the PE pipe 2 are in contact with each other at the contact portion 3. Thus, there is an effect that noise caused by the collision between the PC steel material 1 and the PE pipe 2 can be prevented.
[0022]
Furthermore, according to this embodiment, by filling the foamed urethane 4 between the inner circumference of the PE pipe 2 and the PC steel material 1, the abutting portion 3 of the PE pipe 2 expands due to the time change, and abuts. Even when a gap is generated between the PC steel material 1 and the inner periphery of the PE pipe 2 in the portion 3, the PC steel material 1 is obtained by the foamed urethane 4 filled between the inner periphery of the PE pipe 2 and the PC steel material 1. There is an effect that it is possible to prevent noise caused by the collision between the PE pipe 2 and the PE pipe 2.
[0023]
Note that the present invention is not limited to the above-described embodiments, and it is obvious that the embodiments can be appropriately changed within the scope of the technical idea of the present invention. In addition, the number, position, shape, and the like of the constituent members are not limited to the above-described embodiment, and can be set to a suitable number, position, shape, and the like in practicing the present invention. In each figure, the same numerals are given to the same component.
[0024]
【The invention's effect】
The tension material of the present invention and the manufacturing method thereof are formed by forming a contact portion on the thermoplastic pipe into which the PC steel material is inserted, and bringing the PC steel material and the thermoplastic pipe into contact with each other at the contact portion. There is an effect that the noise caused by the collision between the PC steel material and the thermoplastic pipe can be prevented.
[0025]
Furthermore, the tension material of the present invention and the method for manufacturing the same are obtained by filling the foamed urethane between the inner periphery of the thermoplastic pipe and the PC steel material, so that the contact portion of the thermoplastic pipe expands due to the time change, and the contact. Even when a gap is formed between the PC steel material and the inner periphery of the thermoplastic pipe in the part, the PC steel material and the thermoplastic pipe are separated by the foamed urethane filled between the inner periphery of the thermoplastic pipe and the PC steel material. There is an effect that it is possible to prevent noise caused by the collision.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a configuration of an embodiment of a tendon according to the present invention.
FIG. 2 is a longitudinal sectional view showing a configuration of an embodiment of a tendon according to the present invention.
FIG. 3 is a cross-sectional view showing a configuration of an embodiment of a tendon according to the present invention.
FIG. 4 is a process diagram for explaining the manufacturing method of the embodiment of the tendon according to the present invention.
FIG. 5 is a side view showing a configuration of a bridge pier tension structure.
6 is a cross-sectional view showing a configuration in the vicinity of the fixing device shown in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 PC steel material 2 PE (polyethylene) pipe 3 Contact part 4 Foam urethane 10 Abut 20 Bridge pier 30 Bridge girder 40 Tension material 50 Fixing device 60 Support tube 61 Pipe fixing device

Claims (5)

隣り合う橋脚間もしくは隣り合う橋脚とアバットとの間に張設する緊張材であって、
ＰＣ鋼材と、
該ＰＣ鋼材が挿入され、前記ＰＣ鋼材の直径よりも内径が大きい熱可塑性パイプとからなり、
前記熱可塑性パイプには、内周が前記ＰＣ鋼材に当接している当接部が形成されていることを特徴とする緊張材。A tension material stretched between adjacent piers or between adjacent piers and abutment,
PC steel,
The PC steel material is inserted, and consists of a thermoplastic pipe having an inner diameter larger than the diameter of the PC steel material,
A tension material, wherein the thermoplastic pipe is formed with a contact portion whose inner periphery is in contact with the PC steel material. 前記当接部は、前記熱可塑性パイプが加熱成型によって縮径されていることを特徴とする請求項１記載の緊張材。The tension material according to claim 1, wherein the diameter of the thermoplastic pipe is reduced by heat molding. 前記当接部は、所定間隔毎に形成されていることを特徴とする請求項１又は２記載の緊張材。The tension material according to claim 1, wherein the contact portion is formed at predetermined intervals. 前記当接部に挟まれている箇所の内の一部もしくは全部には、前記ＰＣ鋼材と前記熱可塑性パイプとの間隙に発泡ウレタンが充填されていることを特徴とする請求項３記載の緊張材。4. The tension according to claim 3, wherein a part or all of the portion sandwiched between the contact portions is filled with urethane foam in a gap between the PC steel material and the thermoplastic pipe. Wood. 隣り合う橋脚間もしくは隣り合う橋脚とアバットとの間に張設する緊張材の製造方法であって、
隣り合うアバットと橋脚との距離もしくは隣り合う橋脚間の距離に応じてＰＣ鋼材と熱可塑性パイプとを切断する工程と、
前記ＰＣ鋼材を前記熱可塑性パイプに挿入する工程と、
前記熱可塑性パイプを加熱成型することによって前記熱可塑性パイプの内周が前記ＰＣ鋼材に当接する当接部を形成する工程とを有することを特徴とする緊張材の製造方法。A method of manufacturing a tension member stretched between adjacent piers or between adjacent piers and an abutment,
Cutting the PC steel material and the thermoplastic pipe according to the distance between adjacent abutments and piers or the distance between adjacent piers;
Inserting the PC steel into the thermoplastic pipe;
And a step of forming an abutting portion in which the inner periphery of the thermoplastic pipe abuts on the PC steel material by heat-molding the thermoplastic pipe.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012017135A1 (en) * 2010-08-03 2012-02-09 Soletanche Freyssinet Strand, structural cable and method for manufacturing the strand
WO2020025872A1 (en) 2018-07-31 2020-02-06 Soletanche Freyssinet Method for manufacturing an individually sheathed strand, strand thus obtained and strand manufacturing installation

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JPH09287111A (en) * 1996-04-19 1997-11-04 P S Co Ltd Girder bridge
JPH11323832A (en) * 1998-05-15 1999-11-26 Hiroshima Kasei Ltd Coupling device for preventing bridge falling, and bridge falling prevention method using thereof
JP2001271367A (en) * 2000-03-27 2001-10-05 Kajima Corp Flexible structure by psc construction method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09287111A (en) * 1996-04-19 1997-11-04 P S Co Ltd Girder bridge
JPH11323832A (en) * 1998-05-15 1999-11-26 Hiroshima Kasei Ltd Coupling device for preventing bridge falling, and bridge falling prevention method using thereof
JP2001271367A (en) * 2000-03-27 2001-10-05 Kajima Corp Flexible structure by psc construction method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012017135A1 (en) * 2010-08-03 2012-02-09 Soletanche Freyssinet Strand, structural cable and method for manufacturing the strand
US9085832B2 (en) 2010-08-03 2015-07-21 Soletanche Freyssinet Strand, structural cable and method for manufacturing the strand
KR101732564B1 (en) 2010-08-03 2017-05-04 소레탄체 프레씨네트 Strand, structural cable and method for manufacturing the strand
WO2020025872A1 (en) 2018-07-31 2020-02-06 Soletanche Freyssinet Method for manufacturing an individually sheathed strand, strand thus obtained and strand manufacturing installation

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