EP0893551A2 - Verfahren zum Herstellen und zum Entfernen einer Litze mit Soll-Bruchstelle - Google Patents
Verfahren zum Herstellen und zum Entfernen einer Litze mit Soll-Bruchstelle Download PDFInfo
- Publication number
- EP0893551A2 EP0893551A2 EP98113443A EP98113443A EP0893551A2 EP 0893551 A2 EP0893551 A2 EP 0893551A2 EP 98113443 A EP98113443 A EP 98113443A EP 98113443 A EP98113443 A EP 98113443A EP 0893551 A2 EP0893551 A2 EP 0893551A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- strand
- wire
- cut
- wires
- cable
- 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.)
- Withdrawn
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/80—Ground anchors
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
-
- 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
Definitions
- the invention relates to a method for removing a Strand from its installation position and one for removal prepared strand.
- Prestressing steel strands are used in different areas, for example for prestressed concrete bridges, but also for Slope and pit protection used.
- slope and pit protection systems become underground installed prestressing steel strands used by means of fan, adhesive or loop anchors in the ground are attached.
- the stranded wire must be removed from the ground after use be removed.
- the invention is therefore based on the problem of a To create a strand that defined one in terms of breaking strength Has a predetermined breaking point and is therefore reliable can be used for preloading.
- a strand according to claim 1 where one of the stranded wires is cut what when a certain tractive force is exceeded Break the strand in the area of the cut wire leads.
- the problem is also solved by a method for Treatment of a strand according to claim 2, in which one the stranded wires cut, a certain tensile force is created, causing the strand to break in the area of the cut wire and the broken wire is then removed from its installation position.
- a strand usually consists of seven tension wires. One of the tension wires runs as a heart wire in the Center and is wrapped by the remaining tension wires.
- the heart wire of the strand is preferably severed. This prevents the separated individual wire from fanning out when putting on the train because the heart wire goes through the stranded wires surrounding it and their frictional connection in its position is held.
- Cutting one or more tension wires allowed a defined reduction in breaking strength. So it diminishes Breaking strength when cutting a tension wire at a Strand with seven tension wires around a seventh, or around the severed cross section. Should the breaking strength around a larger proportion only have to be reduced one or more outer wires are cut. Alternatively can also use one or more wires on others Mechanically weakened cross-section.
- the wire For access to the heart wire on the selected The wire must be opened and after cutting of the heart wire are closed again.
- the opening and closing the wire is not a problem, since there is a known procedure for this. With Using the devices known from this area the wire can be easily opened and closed again become.
- the method according to the invention is preferably used in Cutting the strand used so that the user Heart wire when unwinding from the coil on a chosen one Can sever position.
- the invention is suitable for cutting the heart wire Device according to claim 7.
- a tensioning wall 3 which has an anchoring 4 with a prestressing steel strand 6 braced against the pit wall is.
- the prestressing steel strand 6 has after connection with an anchoring 5 in the ground and corresponding preload sufficient hold for the tensioning wall 3.
- the designs can e.g. Single anchor A) or loop anchor B).
- the prestressing steel strand 6 has an area 7 in which the heart wire is cut before the strand is brought forward has been. In this area 7, the strand 6 breaks when over the anchoring 4 a tension is applied to the strand, that exceeds their breaking strength in this area.
- the Breaking strength is in the range 7 around one of the number of severed Corresponding wires reduced. Thereby the breaking strength reduction of the strand can be exactly calculate.
- the prestressing steel strand according to the invention has thus a predetermined breaking point and yet has a defined one Breaking strength.
- Prestressing steel strand 6 opened.
- the device has one Opener 8, a movable pair of scissors 10 and one Normally open 11.
- the prestressing steel strand 6 then closed again, using the outer wires the heart wire 9 in the severed area 7 then in a form-fitting manner surround.
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Architecture (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Reinforcement Elements For Buildings (AREA)
- Ropes Or Cables (AREA)
Abstract
Description
- Fig. 1
- einen schematischen Verlauf eines unterirdisch verlegten Spanndrahtes,
- Fig. 2
- eine geöffnete Sitze mit freigelegtem Herzdraht und erfindungsgemäßer Trennvorrichtung.
Claims (7)
- Verfahren zum Entfernen einer Litze aus ihrer Verlegeposition, bei dem die Litze (6) mechanisch geschwächt wird und ein Zug an die Litze (6) angelegt wird, der die Bruchkraft der Litze im Bereich der Schwächung (7) übersteigt.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß einer der Drähte (9) der Litze (6) durchtrennt oder mechanisch geschwächt wird.
- Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß der Herzdraht (9) der Litze (6) durchtrennt wird.
- Aus ihrer Verlegeposition entfernbare mechanisch geschwächte Sitze.
- Litze nach Anspruch 4, dadurch gekennzeichnet, daß mindestens einer der Drähte (9) der Litze (6) mechanisch geschwächt oder durchtrennt wird.
- Litze nach Anspruch 4, dadurch gekennzeichnet, daß der Herzdraht (9) der Litze (6) durchtrennt wird.
- Vorrichtung zur Schwächung einer Litze gemäß Anspruch 4,5 oder 6 mit einem Öffner (8) zum Öffnen der Litze, einer Schere (10) zum Durchtrennen oder Anritzen eines Drahtes (9) der Litze (6) und einem Schließer (11) zum Schließen der Sitze.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19732023 | 1997-07-25 | ||
DE1997132023 DE19732023A1 (de) | 1997-07-25 | 1997-07-25 | Verfahren zum Herstellen und zum Entfernen einer Litze mit Soll-Bruchstelle |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0893551A2 true EP0893551A2 (de) | 1999-01-27 |
EP0893551A3 EP0893551A3 (de) | 2000-06-07 |
Family
ID=7836862
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98113443A Withdrawn EP0893551A3 (de) | 1997-07-25 | 1998-07-18 | Verfahren zum Herstellen und zum Entfernen einer Litze mit Soll-Bruchstelle |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0893551A3 (de) |
DE (1) | DE19732023A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6447909B1 (en) | 1999-01-14 | 2002-09-10 | Sumitomo Metal Mining Co., Ltd. | Transparent conductive layered structure and method of producing the same, and coating liquid for forming transparent conductive layer used in production of transparent conductive layered structure and method of producing the same |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3899892A (en) * | 1973-02-08 | 1975-08-19 | Ichise Yoshio | Steel cable anchor and method for withdrawing the same |
EP0163479A2 (de) * | 1984-05-22 | 1985-12-04 | Helix Cables International Pty. Ltd. | Gebirgskontrolle |
US4652179A (en) * | 1983-01-13 | 1987-03-24 | Dyckerhoff & Widmann Aktiengesellschaft | Method of and device for severing a tension member in a prestressed grouted anchor |
US4884377A (en) * | 1986-04-28 | 1989-12-05 | Vsl International Ag. | Removable tension member |
US5113634A (en) * | 1988-07-06 | 1992-05-19 | Vsl International Ag | Method of producing a tension part anchorable in the earth |
-
1997
- 1997-07-25 DE DE1997132023 patent/DE19732023A1/de not_active Withdrawn
-
1998
- 1998-07-18 EP EP98113443A patent/EP0893551A3/de not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3899892A (en) * | 1973-02-08 | 1975-08-19 | Ichise Yoshio | Steel cable anchor and method for withdrawing the same |
US4652179A (en) * | 1983-01-13 | 1987-03-24 | Dyckerhoff & Widmann Aktiengesellschaft | Method of and device for severing a tension member in a prestressed grouted anchor |
EP0163479A2 (de) * | 1984-05-22 | 1985-12-04 | Helix Cables International Pty. Ltd. | Gebirgskontrolle |
US4884377A (en) * | 1986-04-28 | 1989-12-05 | Vsl International Ag. | Removable tension member |
US5113634A (en) * | 1988-07-06 | 1992-05-19 | Vsl International Ag | Method of producing a tension part anchorable in the earth |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6447909B1 (en) | 1999-01-14 | 2002-09-10 | Sumitomo Metal Mining Co., Ltd. | Transparent conductive layered structure and method of producing the same, and coating liquid for forming transparent conductive layer used in production of transparent conductive layered structure and method of producing the same |
US6489029B1 (en) | 1999-01-14 | 2002-12-03 | Sumitomo Metal Mining Co., Ltd. | Transparent conductive layered structure and method of producing the same, and coating liquid for forming transparent conductive layer used in production of transparent conductive layered structure and method of producing the same |
US6528112B2 (en) | 1999-01-14 | 2003-03-04 | Sumitomo Metal Mining Co., Ltd. | Transparent conductive layered structure and method of producing the same, and coating liquid for forming transparent conductive layer used in production of transparent conductive layered structure and method of producing the same |
Also Published As
Publication number | Publication date |
---|---|
EP0893551A3 (de) | 2000-06-07 |
DE19732023A1 (de) | 1999-01-28 |
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