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US3590474A - Method of anchoring pre-stressed wire ropes - Google Patents

Method of anchoring pre-stressed wire ropes Download PDF

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Publication number
US3590474A
US3590474A US705381A US3590474DA US3590474A US 3590474 A US3590474 A US 3590474A US 705381 A US705381 A US 705381A US 3590474D A US3590474D A US 3590474DA US 3590474 A US3590474 A US 3590474A
Authority
US
United States
Prior art keywords
wire rope
anchoring
anchoring sleeve
socket
extruding
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.)
Expired - Lifetime
Application number
US705381A
Other languages
English (en)
Inventor
Rene Beghi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Societe des Grands Travaux de Marseille SA
Original Assignee
Societe des Grands Travaux de Marseille SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Societe des Grands Travaux de Marseille SA filed Critical Societe des Grands Travaux de Marseille SA
Application granted granted Critical
Publication of US3590474A publication Critical patent/US3590474A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E04C5/12—Anchoring devices
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E04C5/12—Anchoring devices
    • E04C5/125—Anchoring devices the tensile members are profiled to ensure the anchorage, e.g. when provided with screw-thread, bulges, corrugations
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/39—Cord and rope holders
    • Y10T24/3909—Plural-strand cord or rope
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49863—Assembling or joining with prestressing of part
    • Y10T29/49874—Prestressing rod, filament or strand
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49925—Inward deformation of aperture or hollow body wall
    • Y10T29/49927—Hollow body is axially joined cup or tube
    • Y10T29/49929—Joined to rod
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49908—Joining by deforming
    • Y10T29/49925—Inward deformation of aperture or hollow body wall
    • Y10T29/49934—Inward deformation of aperture or hollow body wall by axially applying force

Definitions

  • the strand or wire rope fastening to said anchoring head may be replaced by UNITED STATES PATENTS that of a screw-threaded rod rigid with, and projecting coaxi- 2,609,586 9/1952 Parry 264/138 ally from, said socket.
  • the present invention is concerned with a method of anchoring wire ropes under prestressed conditions with a view to reduce the overall dimensions of the anchoring structure in comparison with known devices of this character.
  • this invention provides an anchoring socket consisting of a metal sleeve or cylinder preferably formed with external screw threads and with longitudinal, preferably parallel inner passages each adapted to receive a strand or wire rope extending through the relevant passage and emerging therefrom by a length sufficient to permit the gripping thereof by the anchoring head.
  • each strand or wire rope in the aforesaid longitudinal passages of the anchoring socket is improved by using a very hard spring penetrating into the socket and rope material during the extrusion operation.
  • anchoring devices having particularly reduced dimensions, which project from the finished structure but by the minimum length, are obtained.
  • the wire rope system is tensioned by using an actuator, for example a cylinder-and-piston pulling unit, secured to an anchoring head in which the strands or wire ropes are engaged.
  • the anchorage is locked in position by using a nut screwed on the socket; this nut bears against a metal abutment plate of the fixed structure. Then the strands utilized for tensioning the system are cut flush to the outer end of the socket, and the finished anchoring device thus obtained has relatively reduced overall dimensions.
  • these overall dimensions may be further reduced, especially in the longitudinal direction, by using a plain anchoring socket or sleeve comprising on the one hand longitudinal and preferably parallel through passages each adapted to anchor therein, separately, a strand constituting the reinforcing or bracing system, or a wire rope of the multirope system, which extends therethrough and emerges therefrom only by a quantity corresponding to the socket elongation resulting from the extrusion operation, and on the other hand an axial passage engaged by a steel rod of sufficient cross-sectional dimension which has its screw-threaded end screwed in the anchoring head.
  • the strands or wire ropes constituting the bracing or reinforcing system, and on the other hand the rod are rigidly connected to the socket, and the assembly can be tensioned-by simply using an actuator secured to the free, screw-threaded portion of the rod which emerges from the socket.
  • the prestressed anchorage is completed by locking a nut screwed on said central threaded rod and adapted to bear against a metal abutment plate. Then, if desired, the rod portion protruding from the nut may be cut off so that the projecting portion of the anchoring device corresponds simply to the thickness of this nut.
  • FIG. I is an elevational, part-sectional view showing a conventional prestressed anchoring device in its finished condition
  • FIG. 2 is a longitudinal sectional view of an anchoring device, showing the position of the parts before the final tension has actually been applied thereto;
  • FIG. 3 is a section taken along the line III-III of FIG. 2;
  • FIG. 4 is a view similar to FIG. 2 but showing the parts in the tensioned or stressed condition
  • FIG. 5 is a view similar to FIG. 4 but showing the completed anchoring device
  • FIGS. 6, 7 and 8 are views similar to FIGS. 2 and 4 but concerning a modified form of embodiment of the anchoring structure of this invention.
  • the conventional method of anchoring a multistrand wire rope system 1 or a multi rope system consists in engaging the wire rope or wire rope assembly through a socket 2 of a length corresponding substantially to the wire rope elongation under tension (FIG. 1).
  • This extruded socket or sleeve 2 is gripped by the clamping member of a traction actuator (not shown until it emerges from the outflared tubular member 3 and can be fastened to the abutment plate or flange 4 of the locking plug 9.
  • a traction actuator not shown until it emerges from the outflared tubular member 3 and can be fastened to the abutment plate or flange 4 of the locking plug 9.
  • relatively bulky anchoring sockets are necessary and the tensioning operation is obviously delicate to perform.
  • barrel-shaped sockets or sleeves 2 are used, i.e. cylindrical sockets in which preferably rectilinear, parallel and concentric longitudinal through passages 5 are formed; the wire ropes or strands 1 are threaded through these passages and the length thereof which emerges from the opposite end of the socket is a least sufficient to permit the gripping or clamping thereof by means of a suitable device or anchoring head 6 rigid with an annular actuator 7 (FIGS. 2 and 3).
  • the assembly is tensioned in the conventional manner (FIG. 4) until the desired tension is obtained.
  • the wire rope elongation is of course properly calculated beforehand, so that the screw-threaded socket 2 will be so position-ed that it can be locked by means of the nut 9, whereafter the projecting free end of the wire rope can be cut off (FIG. 5).
  • the barrel-shaped anchoring head may be formed with the desired number of longitudinal passages arranged in any suitable manner, the friction forces being exerted over the entire peripheral surface of each elementary strand or wire rope during its passage through the socket, so that the length and trans- 'verse dimension of this socket are reduced considerably.
  • the reinforcing, bracing or like wire rope assembly or structure 1, or each strand or rope is anchored separately in one of the longitudinal parallel passages of socket 2 so as to extend through it and emerge therefrom by a quantity corresponding only to the elongation l of the anchorage during the socket;
  • this socket 2 further comprises an axial through passage 12 engaged by a rod 10 having at least one screw-threaded end, one end 11 of this rod being fastened to the head 6 of a traction actuator 7.
  • the socket 2 is rigidly assembled both with the strands or wire ropes l of the rope system or assembly and with the axial rod 10, suitable members such as hard-steel springs 8 being interposed if desired therebetween to increase the anchoring strength either between the strands and the passages 5 (FIG. 6) or between the axial passage 12 and the traction rod 10 which can be screw-threaded or plain (FIG. 8).
  • a method of anchoring a wire rope in a predetermined tensioned condition to an anchoring frame comprising: providing a wire rope to be tensioned; providing an anchoring frame and an anchoring sleeve movable relative thereto to an anchoring position; extruding said anchoring sleeve on an end portion of said wire rope to an axial distance along the length of said wire rope proportional to the extent of elongation thereof when same is in said predetermined tensioned condition; applying a tensive force directly on said wire rope end portion until said predetermined tensioned condition is obtained accompanied by movement of said anchoring sleeve to said anchoring position; and then locking said anchoring sleeve against'movement relative to said anchoring frame.
  • a method according to claim 1 wherein said first-mentioned providing step comprises providing a multistrand wire rope to be tensioned; and wherein said extruding step comprises simultaneously extruding said anchoring sleeve on respective end portions of each individual strand of said multistrand wire rope to an axial distance along the lengthof said multistrand wire rope proportional to the extent of elongation thereof when same is in said predetermined tensioned condition.
  • a method according to claim 2 including embedding a spring into both said anchoring sleeve and each individual strand of said multistrand wire rope during said extruding step to securely fasten said anchoring sleeve to said multistrand wire rope.
  • extruding step includes extruding said anchoring sleeve on said multistrand wire rope while said individual strands are arranged in a circular configuration.
  • a method according to claim 2 further including the step of removing that portion of said multistrand wire rope projecting beyond said anchoring sleeve after completion of said locking step.
  • a method according to claim 1 including embedding a spring into both said anchoring sleeve and said wire rope during said extruding step to securely fasten said anchoring sleeve to said wire rope.
  • a method according to claim 1 further including the step of removing that portion of said wire rope extending beyond said anchoring sleeve after completion of said locking step.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Piles And Underground Anchors (AREA)
  • Ropes Or Cables (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
US705381A 1967-05-19 1968-02-14 Method of anchoring pre-stressed wire ropes Expired - Lifetime US3590474A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR107013A FR1530660A (fr) 1967-05-19 1967-05-19 Procédé de réalisation d'un ancrage de précontrainte de câbles
FR133900A FR93871E (fr) 1967-05-19 1967-12-27 Procédé de réalisation d'un ancrage de précontrainte de cables.

Publications (1)

Publication Number Publication Date
US3590474A true US3590474A (en) 1971-07-06

Family

ID=26176586

Family Applications (1)

Application Number Title Priority Date Filing Date
US705381A Expired - Lifetime US3590474A (en) 1967-05-19 1968-02-14 Method of anchoring pre-stressed wire ropes

Country Status (7)

Country Link
US (1) US3590474A (fi)
JP (1) JPS5014456B1 (fi)
BE (1) BE710582A (fi)
FR (2) FR1530660A (fi)
GB (1) GB1196692A (fi)
LU (1) LU55439A1 (fi)
NL (1) NL6804726A (fi)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3733681A (en) * 1968-05-16 1973-05-22 Tanner Manuf Co Method of forming gripping device
US3748723A (en) * 1970-12-03 1973-07-31 Shinko Wire Co Ltd Method of anchoring wires and strands in prestressed concrete
US3858991A (en) * 1970-05-18 1975-01-07 Reliable Electric Co Apparatus for preassembling a cable and dead anchor
US4724639A (en) * 1985-01-17 1988-02-16 Vsl International Ag Prestressing anchor arrangement
US6513287B1 (en) * 2000-09-05 2003-02-04 Felix L. Sorkin Apparatus for forming a dead-end anchorage of a post-tension system
US20060265981A1 (en) * 2003-03-01 2006-11-30 Brackett Charles T Wire bolt
US9091064B1 (en) * 2014-03-10 2015-07-28 Christian L. Dahl Rebar anchorage device and method for connecting same to a rebar
CN109594721A (zh) * 2018-12-04 2019-04-09 东南大学 一种预应力frp筋先张法张拉锚固设备
CN114281117A (zh) * 2022-03-04 2022-04-05 交通运输部天津水运工程科学研究所 一种系泊试验用可精细调控缆绳初张力的锚固装置及方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02252815A (ja) * 1989-03-27 1990-10-11 Kajima Corp 地盤アンカー頭部の定着方法
FR2674555B1 (fr) * 1991-03-29 1996-06-07 Bouygues Sa Dispositif d'ancrage.

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2609586A (en) * 1949-12-13 1952-09-09 Raymond Concrete Pile Co Method and apparatus for stressing concrete
US2728978A (en) * 1950-03-10 1956-01-03 Birkenmaier Max Method for pretensioning and anchoring reinforcements of concrete
US2804674A (en) * 1952-06-16 1957-09-03 Long Construction Company Double head reinforcing rod for pre-stress concrete
US2844356A (en) * 1955-04-15 1958-07-22 Losinger Ag Hydraulic jack for tensioning reinforcing wires of prestressed concrete structures
US2869214A (en) * 1957-05-16 1959-01-20 Raymond Int Inc Grouting of reinforcements in posttensioned concrete structures
US2871554A (en) * 1954-06-16 1959-02-03 Losinger Ag Method for post-tensioning the reinforcing of a prestressed concrete structure
CH356261A (fr) * 1958-04-30 1961-08-15 Macchi Romualdo Dispositif d'ancrage pour fils d'acier, destiné à un ouvrage précontraint
SU147312A1 (ru) * 1961-07-15 1961-11-30 М.К. Бородич Гильзовый анкер
US3300922A (en) * 1964-06-09 1967-01-31 Heilmann & Littmann Bau Ag Anchor assembly for prestressed concrete structures

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2609586A (en) * 1949-12-13 1952-09-09 Raymond Concrete Pile Co Method and apparatus for stressing concrete
US2728978A (en) * 1950-03-10 1956-01-03 Birkenmaier Max Method for pretensioning and anchoring reinforcements of concrete
US2804674A (en) * 1952-06-16 1957-09-03 Long Construction Company Double head reinforcing rod for pre-stress concrete
US2871554A (en) * 1954-06-16 1959-02-03 Losinger Ag Method for post-tensioning the reinforcing of a prestressed concrete structure
US2844356A (en) * 1955-04-15 1958-07-22 Losinger Ag Hydraulic jack for tensioning reinforcing wires of prestressed concrete structures
US2869214A (en) * 1957-05-16 1959-01-20 Raymond Int Inc Grouting of reinforcements in posttensioned concrete structures
CH356261A (fr) * 1958-04-30 1961-08-15 Macchi Romualdo Dispositif d'ancrage pour fils d'acier, destiné à un ouvrage précontraint
SU147312A1 (ru) * 1961-07-15 1961-11-30 М.К. Бородич Гильзовый анкер
US3300922A (en) * 1964-06-09 1967-01-31 Heilmann & Littmann Bau Ag Anchor assembly for prestressed concrete structures

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3733681A (en) * 1968-05-16 1973-05-22 Tanner Manuf Co Method of forming gripping device
US3858991A (en) * 1970-05-18 1975-01-07 Reliable Electric Co Apparatus for preassembling a cable and dead anchor
US3748723A (en) * 1970-12-03 1973-07-31 Shinko Wire Co Ltd Method of anchoring wires and strands in prestressed concrete
US4724639A (en) * 1985-01-17 1988-02-16 Vsl International Ag Prestressing anchor arrangement
US6513287B1 (en) * 2000-09-05 2003-02-04 Felix L. Sorkin Apparatus for forming a dead-end anchorage of a post-tension system
US20060265981A1 (en) * 2003-03-01 2006-11-30 Brackett Charles T Wire bolt
US8091317B2 (en) 2003-03-01 2012-01-10 Brackett Charles T Wire bolt
US9091064B1 (en) * 2014-03-10 2015-07-28 Christian L. Dahl Rebar anchorage device and method for connecting same to a rebar
CN109594721A (zh) * 2018-12-04 2019-04-09 东南大学 一种预应力frp筋先张法张拉锚固设备
CN114281117A (zh) * 2022-03-04 2022-04-05 交通运输部天津水运工程科学研究所 一种系泊试验用可精细调控缆绳初张力的锚固装置及方法

Also Published As

Publication number Publication date
FR1530660A (fr) 1968-06-28
JPS5014456B1 (fi) 1975-05-28
BE710582A (fi) 1968-06-17
LU55439A1 (fi) 1968-04-16
GB1196692A (en) 1970-07-01
FR93871E (fr) 1969-05-30
NL6804726A (fi) 1968-11-20

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