JPH0835331A - Tensional end part construction of prestressed concrete structure and tensional end part structure - Google Patents
Tensional end part construction of prestressed concrete structure and tensional end part structureInfo
- Publication number
- JPH0835331A JPH0835331A JP6191196A JP19119694A JPH0835331A JP H0835331 A JPH0835331 A JP H0835331A JP 6191196 A JP6191196 A JP 6191196A JP 19119694 A JP19119694 A JP 19119694A JP H0835331 A JPH0835331 A JP H0835331A
- Authority
- JP
- Japan
- Prior art keywords
- grout
- concrete
- prestressed concrete
- mortar
- hose
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011513 prestressed concrete Substances 0.000 title claims description 22
- 238000010276 construction Methods 0.000 title claims description 13
- 239000011440 grout Substances 0.000 claims abstract description 168
- 239000004567 concrete Substances 0.000 claims abstract description 49
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 29
- 230000002093 peripheral effect Effects 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims description 13
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 16
- 239000010959 steel Substances 0.000 abstract description 16
- 239000004568 cement Substances 0.000 abstract description 2
- 239000002270 dispersing agent Substances 0.000 abstract description 2
- 239000008267 milk Substances 0.000 abstract description 2
- 210000004080 milk Anatomy 0.000 abstract description 2
- 235000013336 milk Nutrition 0.000 abstract description 2
- 238000004873 anchoring Methods 0.000 abstract 3
- 238000000151 deposition Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- 238000012856 packing Methods 0.000 description 4
- 239000011800 void material Substances 0.000 description 4
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010169 landfilling Methods 0.000 description 2
- 210000002445 nipple Anatomy 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 210000001015 abdomen Anatomy 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000009415 formwork Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
Landscapes
- Reinforcement Elements For Buildings (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はプレストレスコンクリー
ト構造物の緊張端部施工方法及び緊張端部構造に関し、
特に緊張端部定着部を覆うグラウトキャンを跡埋めコン
クリート又はモルタルで被覆する緊張端部施工方法及び
緊張端部構造に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tension end construction method and a tension end structure for a prestressed concrete structure,
In particular, the present invention relates to a tension end construction method and a tension end structure in which a grout can covering a tension end fixing portion is covered with a buried concrete or mortar.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】プレス
トレスコンクリート構造物の製造方法（ポストテンショ
ン方式）においては、ＰＣ鋼材とそれを覆うシース及び
補強鉄筋を型枠中に配置した後、該型枠内へコンクリー
トを打設し、コンクリートが所定の強度に達したのち、
ＰＣ鋼材を左右両端あるいはどちらか一方から緊張し、
このＰＣ鋼材の端部を定着具により定着することによっ
て、コンクリートにプレストレスを導入している。その
後、緊張したＰＣ鋼材の腐食を防止し、かつＰＣ鋼材を
シース内に緊張した状態で固定するため、また定着部内
外付近部を固定化するため、外部より定着部付近及びシ
ース内へグラウトを押入充填することが行われる。その
際において、グラウトの押入充填は高圧で実施されるの
で、グラウトキャンを定着部に固定して定着部全体を密
封状態で覆った後、グラウトキャンの外部連通孔（グラ
ウトホースを取着）からグラウトを高圧で導入・充填さ
れる。グラウトの導入・充填の後は、グラウトキャンを
取り外さずにグラウトが硬化するまでかなりの時間（通
常は１２〜２４時間程度）そのまま放置する必要があ
る。その後グラウトキャンを取り外し、次いで跡埋めコ
ンクリート又はモルタルで定着部付近を跡埋め処理する
ことが行われる。よって、グラウトキャンへのグラウト
注入からグラウチング後の定着部近傍のモルタルによる
跡埋め処理までの作業工程には非常に長い時間を費やし
ている。2. Description of the Related Art In a method of manufacturing a prestressed concrete structure (post-tension method), a PC steel material, a sheath covering the PC steel material, and a reinforcing bar are arranged in a mold and then the mold is formed. After placing concrete into the frame and the concrete reaches the specified strength,
Tensile the PC steel from both left and right ends, or
Prestress is introduced into the concrete by fixing the end of this PC steel material with a fixing tool. After that, in order to prevent the strained PC steel material from corroding and fix the PC steel material in the sheath in a tensioned state, and to fix the inside and outside of the fixing portion, a grout is provided from the outside into the fixing portion and the sheath. Push-in filling is performed. At that time, since the grout is pushed in and filled at a high pressure, after fixing the grout can to the fixing part and covering the whole fixing part in a sealed state, the grout can is connected to the external communication hole (the grout hose is attached). Grout is introduced and filled at high pressure. After the introduction and filling of the grout, it is necessary to leave the grout can for a considerable period of time (usually about 12 to 24 hours) without removing the grout can. After that, the grout can is removed, and then the vicinity of the fixing part is subjected to the residual filling treatment with the residual filling concrete or mortar. Therefore, a very long time is spent in the work process from the grout injection into the grout can to the trace mortar filling process near the fixing portion after the grouting.
【０００３】また、グラウトの導入はかなりの高圧で行
われるため、グラウトキャンで定着部全体を密封状態で
覆っても、高圧でグラウトを注入充填する際に、グラウ
トキャンと定着部と間の僅かな間隙からグラウトが漏出
してしまって、グラウト充填が定着部内部やシース内部
の隅々まで充分に行われないことが多々ある。さらに、
グラウトキャンの取付部に間隙があったりすると、それ
ら部分からグラウトが漏出してしまう問題があった。そ
うした問題が発生しないようにするために、グラウトキ
ャンの取り付け方法とシーリングには適切な手当及び細
心の注意をはらう必要がある。Further, since the introduction of grout is carried out at a considerably high pressure, even if the entire fixing section is covered with a grout can in a hermetically sealed state, when the grout is injected and filled at a high pressure, there is a slight gap between the grout can and the fixing section. In many cases, the grout leaks out from such a gap, so that the grout is not sufficiently filled in the fixing unit and every corner of the sheath. further,
If there is a gap in the mounting portion of the grout can, there is a problem that the grout leaks from those portions. In order to prevent such problems from occurring, it is necessary to take appropriate measures and meticulous attention to the mounting method and sealing of the grout can.
【０００４】[0004]
【課題を解決するための手段】本発明者は上記従来技術
の各種問題を解決すべく、鋭意研究した結果、容易かつ
経済的手段で完璧なグラウト充填をすることに成功し、
本発明のプレストレスコンクリート構造物の緊張端部施
工方法及び緊張端部構造を提供するに至った。すなわち
本発明は、（１）プレストレスコンクリート構造物の緊
張端部施工方法において、グラウトキャンを定着部上に
取着して定着部全体をグラウトキャンで覆い、次いでグ
ラウトホースを介してグラウトを前記グラウトキャン内
へ高圧で導入し、しかる後前記グラウトキャンを取り外
すことなく、引き続いて同定着部近傍のコンクリート表
面と同グラウトキャン外周面とを跡埋めコンクリート又
はモルタルで被覆硬化することを特徴とするプレストレ
スコンクリート構造物の緊張端部施工方法、（２）プレ
ストレスコンクリート構造物の緊張端部施工方法におい
て、定着部にグラウトホースを取着したグラウトキャン
を固定して定着部全体をグラウトキャンで覆い、次いで
同定着部近傍のコンクリート表面と同グラウトキャン外
周面とを跡埋めコンクリート又はモルタルで被覆硬化し
た後、前記グラウトホース端部からグラウトをグラウト
キャン内へ高圧で導入することを特徴とするプレストレ
スコンクリート構造物の緊張端部施工方法、及び（３）
プレストレスコンクリート構造物の緊張端部構造におい
て、定着部上に定着部全体を覆うごとく取着されたグラ
ウトホースを取着したグラウトキャンと、同グラウトキ
ャン外周面と同定着部近傍のコンクリート表面とを被覆
硬化してなる跡埋めコンクリート又はモルタルと、前記
グラウトキャン内部、前記定着部内部及びシース内部に
充填硬化されてなるグラウト硬化物とからなることを特
徴とするプレストレスコンクリート構造物の緊張端部構
造である。そして、上記本発明においては、グラウトキ
ャンは、上縁部にリング状リブを備えた有底円筒体で取
扱い上かつ経済上できる限り薄肉であることが好まし
く、また跡埋めをしない状態でグラウトを行う場合のグ
ラウトキャンについては、有底円筒体の底部背面に十字
型押えプレートを固定してなるものを用いることが好ま
しい。As a result of intensive studies to solve the above-mentioned various problems of the prior art, the present inventor succeeded in perfect grout filling by an easy and economical means,
The present invention has been made to provide a tension end construction method and a tension end structure for a prestressed concrete structure of the present invention. That is, the present invention relates to (1) a method of constructing a tensioned end portion of a prestressed concrete structure, in which a grout can is attached to the fixing part, the fixing part is entirely covered with the grout can, and then the grout is attached via a grout hose. It is characterized in that it is introduced into the grout can at a high pressure, and thereafter, without removing the grout can, subsequently, the concrete surface in the vicinity of the identified attachment part and the outer peripheral surface of the grout can are covered and hardened by covering with concrete or mortar. In the tensioned end construction method of prestressed concrete structure, (2) Tensioned end construction method of prestressed concrete structure, fix the grout can with the grout hose attached to the fixing part, and fix the entire fixing part with the grout can. Cover, and then the concrete surface near the identified joint and the outer surface of the grout can. After coating cured concrete or mortar filling, tension end construction method of the prestressed concrete structure and introducing the grout from the grout hose end at a high pressure into the grout scan, and (3)
In a tensioned end structure of a prestressed concrete structure, a grout can with a grout hose attached so as to cover the entire anchorage on the anchorage, the outer surface of the grout can and the concrete surface near the identified anchorage A tense end of a prestressed concrete structure, characterized in that it comprises a residual filling concrete or mortar formed by coating and hardening, and a grout hardened material obtained by filling and hardening the inside of the grout can, the inside of the fixing portion and the inside of the sheath. It is a partial structure. In the present invention, the grout can is a bottomed cylindrical body having a ring-shaped rib on the upper edge, and it is preferable that the grout can be as thin as possible in terms of handling and economy. Regarding the grout can in the case of performing, it is preferable to use a grout can in which a cross-shaped pressing plate is fixed to the bottom rear surface of the bottomed cylindrical body.
【０００５】[0005]
【作用】第１の本発明においては、グラウトキャンを定
着部上に取着して定着部全体をグラウトキャンで覆い、
次いでグラウトホースを介してグラウトを前記グラウト
キャン内へ高圧で導入し、しかる後前記グラウトキャン
を取り外すことなく、同定着部近傍のコンクリート表面
と同グラウトキャン外周面とを跡埋めコンクリート又は
モルタルで被覆・硬化するので、従来法のごとくグラウ
トキャンを取り外す手間がかからなく、その結果グラウ
トキャンへのグラウト注入からグラウトチング後の定着
部近傍のモルタルによる跡埋処理までの作業工程を非常
に短時間で効率的に実施することができる。この方法
は、下記第２の方法のように跡埋めコンクリート又はモ
ルタルが十分硬化するまで（１２〜２４）時間待つ必要
がない。また第２の本発明においては、グラウトキャン
の外周部及び定着部近傍表面を跡埋めコンクリート又は
モルタルで完全に被覆した後に、グラウトキャン内へグ
ラウトを高圧注入する。グラウトキャンの外周面部及び
定着部近傍表面を跡埋めコンクリート又はモルタルで完
全に被覆した後に、グラウトキャン内へグラウトを高圧
注入するため、グラウトキャンの取り付けにおいて、十
字型押えプレートの有無にかかわらずリング状リブの所
でボルトにより取り付けてもグラウトの漏れ等の問題が
生じない。In the first aspect of the present invention, the grout can is attached to the fixing portion and the entire fixing portion is covered with the grout can.
Then, the grout is introduced into the grout can through a grout hose at a high pressure, and thereafter, without removing the grout can, the concrete surface in the vicinity of the identified attachment part and the outer peripheral surface of the grout can are covered with trace-filling concrete or mortar.・ Since it hardens, it does not take time and effort to remove the grout can as in the conventional method, and as a result, the work process from grout injection into the grout can to trace mortar filling in the vicinity of the fixing part after grouting is performed in a very short time. Can be implemented efficiently. In this method, it is not necessary to wait (12 to 24 hours) until the filling concrete or the mortar is sufficiently hardened, unlike the second method described below. Further, in the second aspect of the present invention, after the outer peripheral portion of the grout can and the surface in the vicinity of the fixing portion are completely covered with the trace-filling concrete or mortar, the grout is injected into the grout can under high pressure. Since the outer surface of the grout can and the surface in the vicinity of the anchorage are completely covered with trace-filling concrete or mortar, the grout can be injected into the grout can at a high pressure. Even if bolts are attached at the ribs, problems such as grout leakage do not occur.
【０００６】[0006]
【実施例】以下に図面に基づき、本発明の実施例を説明
する。図１は本発明の実施例１のプレストレスコンクリ
ート構造物の施工端部の断面図を示す。図２は実施例２
の断面図を示す。図３は、図１におけるグラウトキャン
（Ａ型）と定着具の組み合わせの斜視図を示す。図４は
図２におけるグラウトキャン（Ｂ型）と定着具の組み合
わせの斜視図を示す。図５は図３のグラウトキャン（Ａ
型）の上端図及び断面図、図６は図４のグラウトキャン
（Ｂ型）の上端図及び断面図を示す。図７は定着具のプ
ラグの上端図及び断面図を示す。図中、Ｃはコンクリー
ト、Ｇはグラウト、Ｍは跡埋めコンクリート又はモルタ
ル、１はＰＣ鋼材ケーブル、２はシース、３は定着具の
ソケット、４は定着具のプラグ、５は十字型押えプレー
ト、６は固定スタッド、７はナット、８はグラウトキャ
ン、８ａはグラウトキャンリブ、９はグラウトホース、
１０はパッキン、１１はグラウトキャン固定ボルトであ
る。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a sectional view of a construction end portion of a prestressed concrete structure according to a first embodiment of the present invention. Second Embodiment
FIG. FIG. 3 is a perspective view of a combination of the grout can (A type) and the fixing device in FIG. FIG. 4 is a perspective view of a combination of the grout can (B type) and the fixing device in FIG. FIG. 5 shows the grout can (A in FIG.
6) is a top view and a sectional view of the grout can (B type) of FIG. FIG. 7 shows an upper end view and a sectional view of the plug of the fixing device. In the figure, C is concrete, G is grout, M is trace-filled concrete or mortar, 1 is a PC steel cable, 2 is a sheath, 3 is a fixing tool socket, 4 is a fixing tool plug, 5 is a cross-shaped pressing plate, 6 is a fixed stud, 7 is a nut, 8 is a grout can, 8a is a grout can rib, 9 is a grout hose,
10 is a packing and 11 is a grout can fixing bolt.
【０００６】［実施例１］本実施例では、まず図１の定
着部付近の緊張端部施工断面説明図に示すごとく、コン
クリートＣ端部に埋設された定着具のソケット３とプラ
グ４によりＰＣ鋼材ケーブル１の端部が緊張状態に定着
される。鋼管製のシース２はソケット３のテーパー穴の
下端開口部に連結して下設され、６〜１２本のＰＣ鋼材
ケーブル１を包覆する。この緊張端部の定着部上に、グ
ラウトキャン８（Ａ型）をグラウトキャン固定ボルト１
１で固定する。グラウトキャン８（図５）は、上縁部に
リング状リブ８ａを備えた有底円筒体で、円筒直径は１
１０ｍｍ、高さは７０ｍｍ、リブ巾は１７．５ｍｍのも
のを用いた。８ｃはボルト１１用の小孔。材質は、鋼製
で厚み１ｍｍのプレス加工品を用いた。また、グラウト
キャン８（Ａ型）の下腹部に穿設された連結孔には、グ
ラウトホース９取り付け用の取り付け管８ｂ（外形１９
ｍｍ）が取着されており、それにグラウトホース９（内
径１９ｍｍ）が取り付けられている。そこで、図１に定
着部付近の断面図を示すごとく、グラウトホース９の端
部からグラウトＧをグラウトキャン８内部の定着部内
外、シース２内部に高圧（５〜１０Ｋｇ／ｃｍ2）で導
入する。グラウトＧはプラグ４の中心穴４ａを通ってシ
ース２内部に給送される。なお、グラウトＧは、分散剤
等の混和剤が添加混合されてなるセメントミルクであ
る。次いで、定着部近傍のコンクリートＣ表面と、グラ
ウトキャン８外周面を覆うようにして、型枠を用いて跡
埋め用のコンクリート又はモルタルＭを打設し、硬化し
た。なお、跡埋めコンクリート又はモルタルは、コンク
リートＣと同一又は近似したものとして、一体化させ
る。[Embodiment 1] In this embodiment, first, as shown in FIG. 1 which is a sectional view of a tensioned end portion in the vicinity of a fixing portion, a PC is constructed by a socket 3 and a plug 4 of a fixing tool embedded in an end portion of concrete C. The end of the steel cable 1 is fixed in a tensioned state. A sheath 2 made of steel pipe is connected to the lower end opening portion of the tapered hole of the socket 3 and is provided under the sheath 2, and covers 6 to 12 PC steel material cables 1. The grout can 8 (A type) is mounted on the fixing part at the end of the tension by the grout can fixing bolt 1
Fix at 1. The grout can 8 (FIG. 5) is a bottomed cylindrical body having a ring-shaped rib 8a at the upper edge, and the cylindrical diameter is 1
10 mm, a height of 70 mm, and a rib width of 17.5 mm were used. 8c is a small hole for the bolt 11. The material used was a pressed product made of steel and having a thickness of 1 mm. Further, in the connection hole formed in the lower abdomen of the grout can 8 (A type), a mounting pipe 8b (outer shape 19) for mounting the grout hose 9 is formed.
mm) is attached, and the grout hose 9 (inner diameter 19 mm) is attached thereto. Therefore, as shown in a cross-sectional view of the vicinity of the fixing portion in FIG. 1, grout G is introduced from the end of the grout hose 9 into the inside of the fixing portion inside the grout can 8 and inside the sheath 2 at high pressure (5 to 10 kg / cm 2 ). . The grout G is fed into the sheath 2 through the center hole 4a of the plug 4. The grout G is cement milk in which an admixture such as a dispersant is added and mixed. Then, concrete or mortar M for landfilling was cast using a mold so as to cover the surface of the concrete C near the fixing portion and the outer peripheral surface of the grout can 8 and hardened. In addition, the trace-filled concrete or mortar is integrated as the same or similar to the concrete C.
【０００７】グラウトキャン８（Ａ型）は、金属製のも
の、例えば鋼製のもので製作されてよいが、厚み１ｍｍ
のプレス加工品が使用され、耐圧強度水密１０Ｋｇｆ／
ｃｍ2以上が確保される。なお、図３に本実施例１に係
るグラウトキャン８と（Ａ型）定着具のソケット３その
他との取り付け状態の斜視図説明図を示した。The grout can 8 (A type) may be made of metal, for example steel, but has a thickness of 1 mm.
Pressed product of is used, pressure resistance watertight 10Kgf /
cm 2 or more is secured. Note that FIG. 3 is a perspective view explanatory diagram of a mounting state of the grout can 8 according to the first embodiment and the socket 3 and the like of the (A-type) fixing device.
【０００８】また上記実施例１の他の実施態様として、
まず実施例１と同様にして定着部上に、グラウトキャン
８（Ａ型）をグラウトキャン固定ボルト１１で固定した
後に図１の定着部付近の断面図を示すごとく、定着部近
傍のコンクリートＣ表面と、グラウトキャン８外周面を
覆うようにして、型枠を用いて跡埋めコンクリート又は
モルタルＭを打設し、硬化した。跡埋めコンクリート又
はモルタルの組成及び物性は、コンクリートＣと同一又
は近似したものとして、一体化させた。As another embodiment of the first embodiment,
First, as in Example 1, after fixing the grout can 8 (A type) on the fixing portion with the grout can fixing bolts 11, as shown in the cross-sectional view of the vicinity of the fixing portion in FIG. Then, so as to cover the outer peripheral surface of the grout can 8, the landfill concrete or the mortar M was placed using a mold and cured. The composition and physical properties of the post-filling concrete or mortar were the same as or similar to those of the concrete C, and were integrated.
【０００９】跡埋めコンクリート又はモルタルＭが硬化
したところで、実施例１と同様にしてグラウトホース９
の端部からグラウトＧをグラウトキャン８内部の定着部
内外、シース２内部に高圧（５〜１０Ｋｇ／ｃｍ2）で
導入した。グラウトＧはグラウトホース９から高圧で導
入されるが、定着部近傍及びグラウトキャン８外周面が
跡埋めコンクリート又はモルタルで全て覆われているた
め、仮にグラウトキャン８（Ａ型）と定着板３との間に
隙間があったりしても、グラウトＧはその隙間から外部
に漏出することができなく、よってグラウトキャン８内
部の空隙部及びシース２内空隙部の隅々までグラウトが
注入・充填される。[0009] When the residual concrete or mortar M has hardened, the grout hose 9 is processed in the same manner as in Example 1.
The grout G was introduced into the inside and outside of the fixing portion inside the grout can 8 and the inside of the sheath 2 at a high pressure (5 to 10 kg / cm 2 ) from the end of the. The grout G is introduced at a high pressure from the grout hose 9, but since the vicinity of the fixing portion and the outer peripheral surface of the grout can 8 are all covered with the trace-filling concrete or mortar, the grout can 8 (A type) and the fixing plate 3 are temporarily assumed. Even if there is a gap between them, the grout G cannot leak to the outside through the gap, so that the grout can be injected and filled into the void inside the grout can 8 and every corner of the void inside the sheath 2. It
【００１０】［実施例２］本実施例では、実施例１と同
様にして図２の定着部付近の施工断面説明図に示すごと
く、コンクリートＣ端部に埋設された定着具のソケット
３、プラグ４、ＰＣ鋼材ケーブル１等からなる定着部上
に、パッキン１０を挟んでグラウトキャン８（Ｂ型）を
固定する。ただしこの場合、グラウトキャン８（Ｂ型）
は本体は実施例１のＡ型のものと同様であるが、底部背
面にステンレススティール製の十字型の押えプレート
（厚み４．５ｍｍ、一辺の長さ１４５ｍｍ）１０が接着
されており、その各端部に小孔８ｃに倣って小孔８ｄが
穿設されているものを使用する。そこで、該小孔８ｃ、
８ｄと定着具のソケット３に設けられたネジ穴を利用し
て、グラウトキャン固定スタッド６を取り付け、ナット
７で螺締めして、グラウトキャン８（Ｂ型）を定着部に
底部背面から押圧して固定する。この十字型押えプレー
ト５を背接したグラウトキャン８（Ｂ型）を用いた結
果、リブに沿って均等かつ大きな押圧が働いて、パッキ
ン１０の使用と相俟ってグラウトキャン８が高圧グラウ
ト導入圧を受けてもグラウトが漏出することもなく高い
内部圧によりキャン８が変形することもなく、比較的薄
い肉厚のキャン（厚さ１ｍｍのプレス加工品）であって
も使用に耐えた。なお、図４に本実施例２に係るグラウ
トキャン８（Ｂ型）と定着体３その他との取り付け状態
の斜視説明図を示した。次いで、図２のごとく定着部近
傍のコンクリートＣ表面と、十字プレートを背接したグ
ラウトキャン８（Ｂ型）及び十字型押えプレートの外周
面を覆うようにして、型枠を用いて跡埋め用のコンクリ
ート又はモルタルＭを打設し、硬化した。なお、跡埋め
コンクリート又はモルタルは、コンクリートＣと同一又
は近似したものとして、一体化させる。[Embodiment 2] In this embodiment, as in Embodiment 1, as shown in the construction cross-sectional explanatory view of the vicinity of the fixing portion in FIG. 2, the socket 3 and the plug of the fixing tool embedded in the end portion of the concrete C are shown. 4. The grout can 8 (B type) is fixed on the fixing portion composed of the PC steel cable 1 and the like with the packing 10 sandwiched therebetween. However, in this case, grout can 8 (B type)
The main body is the same as that of the A type of the first embodiment, but a cross-shaped holding plate (thickness: 4.5 mm, side length: 145 mm) 10 made of stainless steel is adhered to the back surface of the bottom, and each of them is adhered. A small hole 8d is formed in the end portion in a manner similar to the small hole 8c. Therefore, the small hole 8c,
8d and the screw hole provided in the socket 3 of the fixing device, the grout can fixing stud 6 is attached, and the nut 7 is screwed, and the grout can 8 (B type) is pressed against the fixing portion from the bottom rear surface. To fix. As a result of using the grout can 8 (B type) with the cross-shaped presser plate 5 attached to the back, a uniform and large pressure is exerted along the ribs, and in cooperation with the use of the packing 10, the grout can 8 introduces the high pressure grout. Even when pressure was applied, the grout did not leak, the high internal pressure did not deform the can 8, and even a relatively thin walled can (pressed product with a thickness of 1 mm) withstood use. Note that FIG. 4 is a perspective explanatory view of a mounting state of the grout can 8 (B type) according to the second embodiment and the fixing body 3 and others. Then, as shown in FIG. 2, the surface of the concrete C near the fixing portion, the grout can 8 (B type) backing the cross plate and the outer peripheral surface of the cross holding plate are covered, and the traces are filled with a formwork. Concrete or mortar M was placed and cured. In addition, the trace-filled concrete or mortar is integrated as the same or similar to the concrete C.
【００１１】また本実施例２のグラウトホース９には、
図２のごとく、グラウト送給ポンプ側のグラウトホース
９’との間にワンタッチ式で着脱簡易なワンタッチ式カ
ップラー１２及びハンドルコック１３が介挿され、グラ
ウトＧの注入作業を簡易化している。該カップラー１２
は前記実施例１にも使用可能である。なお、９ａはニッ
プル、１３はハンドルコツク、１４は凸カップラー、１
５は凹カップラーである。Further, in the grout hose 9 of the second embodiment,
As shown in FIG. 2, a one-touch type, simple-to-detach, one-touch type coupler 12 and a handle cock 13 are inserted between the grout hose 9'on the grout feed pump side and the handle cock 13 to simplify the grout G injection work. The coupler 12
Can also be used in the first embodiment. 9a is a nipple, 13 is a handle cock, 14 is a convex coupler,
Reference numeral 5 is a concave coupler.
【００１２】[0012]
【発明の効果】以上に記載した本発明のプレストレスコ
ンクリートの端部施工方法及び端部構造によれば、以下
の優れた効果を期待できる。 （１）従来法では、グラウトキャンを定着部上に固定
し、その中へグラウトホースからグラウトを高圧で注入
・硬化した後、グラウトキャンを取り外し、その後モル
タルで跡埋め処理をしていたが、第１の本発明によれ
ば、Ａ型又はＢ型のグラウトキャンを取り外すことな
く、引き続いてそのまま跡埋めモルタル中に残置してし
まうため、グラウト硬化に要する時間（１２〜２４時
間）を待つことなく、また手間もかからない。 （２）第２の本発明によれば、これは第１をよりシンプ
ルに改変したものであるが、Ａ型又はＢ型のグラウトキ
ャンの外周部及び定着部近傍表面を跡埋めモルタルで完
全に被覆した後に、グラウトキャン内へグラウトを高圧
注入するため、仮にグラウトキャンの取り付け第１のも
の程細心の注意と適切十分な方法でなく簡易であって
も、注入グラウトが外部へ漏出することがなく、よって
グラウトキャン内部の空隙部及びシース内空隙部の隅々
までグラウトが充分に注入・充填される。第１のものよ
りも簡易であっても漏出の問題が生じない。EFFECTS OF THE INVENTION According to the method and the structure for constructing the end portion of the prestressed concrete of the present invention described above, the following excellent effects can be expected. (1) In the conventional method, the grout can was fixed on the fixing part, the grout was injected into the grout hose at a high pressure and then cured, and then the grout can was removed, and then the mortar was used for the landfilling treatment. According to the first aspect of the present invention, without removing the A-type or B-type grout can, the grout can is continuously left as it is in the trace-filling mortar, so that the time (12 to 24 hours) required for the grout hardening is waited. There is no time and effort. (2) According to the second aspect of the present invention, this is a simpler modification of the first aspect, but the outer peripheral portion of the A-type or B-type grout can and the surface in the vicinity of the fixing portion are completely filled with mortar. After coating, the grout can be injected into the grout can at a high pressure, so even if the grout can is installed first, the pouring grout can leak out to the outside even if it is not a careful and proper method. Therefore, the grout is sufficiently injected and filled into every corner of the void inside the grout can and the void inside the sheath. Even if it is simpler than the first one, the problem of leakage does not occur.
【図１】本発明の実施例１のプレストレスコンクリート
構造物の施工端部の断面図。FIG. 1 is a sectional view of a construction end portion of a prestressed concrete structure according to a first embodiment of the present invention.
【図２】本発明の実施例２のプレストレスコンクリート
構造物の施工端部の断面図。FIG. 2 is a sectional view of a construction end portion of a prestressed concrete structure according to a second embodiment of the present invention.
【図３】図１におけるグラウトキャン（Ａ型）と定着具
その他との取り付け状態の斜視説明図を示す。FIG. 3 is a perspective explanatory view of a state in which the grout can (A type) and the fixing device and the like in FIG. 1 are attached.
【図４】図２におけるグラウトキャン（Ｂ型）と定着具
その他との取り付け状態の斜視説明図を示す。FIG. 4 is a perspective explanatory view showing a mounting state of the grout can (B type) and the fixing device and the like in FIG.
【図５】図３のグラウトキャン（Ａ型）の上端図及び断
面図を示す。5 shows a top view and a cross-sectional view of the grout can (A type) of FIG.
【図６】図４のグラウトキャン（Ｂ型）の上端図及び断
面図を示す。6 shows a top view and a cross-sectional view of the grout can (B type) of FIG.
【図７】定着具のプラグの上端図及び断面図を示す。FIG. 7 shows an upper end view and a sectional view of a plug of a fixing device.
１ ＰＣ鋼材ケーブル ２ シース ３ 定着具のソケット ４ 定着具の
プラグ ４ａ 中心穴 ５ 十字型押
えプレート ６ 固定スタッド ７ ナット ８ グラウトキャン ８ａ グラウ
トキャンリブ ８ｂ 取り付け管 ８ｃ、８ｄ
小孔 ９、９ ’ グラウトホース ９ａ ニッ
プル １０ パッキン １１ グラ
ウトキャン固定ボルト １２ ワンタッチ式カップラー １３ ハン
ドルコック １４ 凸カップラー １５ 凹カ
ップラー Ｃ コンクリート構造物 Ｇ グラウト Ｍ 跡埋めコンクリート又はモルタル1 PC Steel Cable 2 Sheath 3 Socket for Fixing Tool 4 Plug for Fixing Tool 4a Center Hole 5 Cross Holding Plate 6 Fixing Stud 7 Nut 8 Grout Can 8a Grout Can Rib 8b Mounting Tube 8c, 8d
Small hole 9, 9'Grout hose 9a Nipple 10 Packing 11 Grout can fixing bolt 12 One-touch type coupler 13 Handle cock 14 Convex coupler 15 Concave coupler C Concrete structure G Grout M Remaining concrete or mortar
Claims (7)
端部施工方法において、グラウトキャンを定着部上に取
着して定着部全体をグラウトキャンで覆い、次いでグラ
ウトホースを介してグラウトを前記グラウトキャン内へ
高圧で導入し、しかる後前記グラウトキャンを取り外す
ことなく、引き続いて同定着部近傍のコンクリート表面
と同グラウトキャン外周面とを跡埋めコンクリート又は
モルタルで被覆、硬化することを特徴とするプレストレ
スコンクリート構造物の緊張端部施工方法。1. A method for constructing a tensioned end portion of a prestressed concrete structure, wherein a grout can is attached to the fixing part, the fixing part is entirely covered with the grout can, and then the grout is attached to the inside of the grout can via a grout hose. Prestress, characterized in that it is introduced at high pressure into, and subsequently, without removing the grout can, subsequently covering the concrete surface and the outer peripheral surface of the grout can in the vicinity of the identified joint with trace-filling concrete or mortar and hardening. Construction method for tensioned ends of concrete structures.
端部施工方法において、グラウトホースを取着したグラ
ウトキャンを定着部上に取着して定着部全体をグラウト
キャンで覆い、次いで同定着部近傍のコンクリート表面
と同グラウトキャン外周面とを跡埋めコンクリート又は
モルタルで被覆硬化した後、前記グラウトホース端部か
らグラウトをグラウトキャン内へ高圧で導入することを
特徴とするプレストレスコンクリート構造物の緊張端部
施工方法。2. A method of constructing a tensioned end portion of a prestressed concrete structure, wherein a grout can attached with a grout hose is attached onto the fixing portion, and the entire fixing portion is covered with the grout can, and then the vicinity of the identified attachment portion is attached. After the concrete surface and the outer peripheral surface of the grout can are covered and hardened by coating with concrete or mortar, the grout hose end is used to introduce grout into the grout can at high pressure. Part construction method.
ブを備えた有底円筒体であることを特徴とする請求項１
又は２記載のプレストレスコンクリート構造物の緊張端
部施工方法。3. The grout can is a bottomed cylindrical body having a ring-shaped rib on the upper edge thereof.
Alternatively, the method for constructing a tensioned end portion of a prestressed concrete structure according to item 2.
ブを備えた有底円筒体で、かつその底部背面に十字型押
えプレートを固定してなるものであることを特徴とする
請求項１又は２記載のプレストレスコンクリート構造物
の緊張端部施工方法。4. The grout can is a bottomed cylindrical body having a ring-shaped rib at its upper edge, and a cross-shaped press plate is fixed to the back surface of the bottom. Alternatively, the method for constructing a tensioned end portion of a prestressed concrete structure according to item 2.
端部構造において、定着部上に定着部全体を覆うごとく
取着されたグラウトホースを取着したグラウトキャン
と、同グラウトキャン外周面と同定着部近傍のコンクリ
ート表面とを被覆硬化してなる跡埋めコンクリート又は
モルタルと、前記グラウトキャン内部、前記定着部内部
及びシース内部に充填硬化されてなるグラウト硬化物と
からなることを特徴とするプレストレスコンクリート構
造物の緊張端部構造。5. In a tensioned end structure of a prestressed concrete structure, a grout can having a grout hose attached to the fixing part so as to cover the entire fixing part, an outer peripheral surface of the grout can, and an identifying attachment part. Prestressed concrete, characterized in that it is composed of a trace-filled concrete or mortar formed by coating and hardening a concrete surface in the vicinity, and a grout hardened material obtained by filling and hardening the inside of the grout can, the inside of the fixing part and the inside of the sheath. Tension end structure of the structure.
ブを備えた有底円筒体であることを特徴とする請求項５
記載のプレストレスコンクリート構造物の緊張端部構
造。6. The grout can is a bottomed cylindrical body having a ring-shaped rib at the upper edge thereof.
Tensioned end structure of the described prestressed concrete structure.
ブを備えた有底円筒体で、かつその底部背面に十字型押
えプレートを固定してなるものであることを特徴とする
請求項５記載のプレストレスコンクリート構造物の緊張
端部構造。7. The grout can is a bottomed cylindrical body having a ring-shaped rib at its upper edge, and a cross-shaped press plate is fixed to the back surface of the bottom. Tensioned end structure of the described prestressed concrete structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6191196A JPH0835331A (en) | 1994-07-22 | 1994-07-22 | Tensional end part construction of prestressed concrete structure and tensional end part structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6191196A JPH0835331A (en) | 1994-07-22 | 1994-07-22 | Tensional end part construction of prestressed concrete structure and tensional end part structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0835331A true JPH0835331A (en) | 1996-02-06 |
Family
ID=16270509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6191196A Pending JPH0835331A (en) | 1994-07-22 | 1994-07-22 | Tensional end part construction of prestressed concrete structure and tensional end part structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0835331A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103240802A (en) * | 2013-05-16 | 2013-08-14 | 淮海工学院 | Production method of prestress concrete filled steel tube |
-
1994
- 1994-07-22 JP JP6191196A patent/JPH0835331A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103240802A (en) * | 2013-05-16 | 2013-08-14 | 淮海工学院 | Production method of prestress concrete filled steel tube |
| CN103240802B (en) * | 2013-05-16 | 2015-07-08 | 淮海工学院 | Production method of prestress concrete filled steel tube |
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