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    Determining Proper Anchor Length. Rock & Soil Anchors: Case Histories: ... free-stress length also helps to minimize load loss due to movement at the anchor head during load transfer from the stressing jack. The Post Tensioning Institute recommends that for pre-stressed rock or soil anchors utilizing steel bars, the free-stress length shall be ...

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    Products - DSI USA

    Product Overview Post-Tensioning Systems Stay Cable Systems Geotechnical Systems Reinforcement Systems Concrete Accessories Structural Repair Solution...

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    Post Tension Detailing, Precast/Prestressed Post Tension Detailing Drawings Services ... and asked the contractor to substantiate with the design calculations. Cable arrangements Sequence of pre-stressing Check calibration of Jack to ascertain that over stressing has not been done Stress verses elongation Table as per actual at both ends ...

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    Compressive behaviour and design of prestressed steel

    The behaviour and design of prestressed elements subjected to external compression is the subject of the present paper. ... which is the optimal prestress corresponding to simultaneous yielding of the tube and cable in tension, as defined in . ... the specimens were prestressed using a T25 stressing jack.

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    US3237357A - Wall and floor construction of prestressed

    A suitable jack 22 will be attached to the ,opposite ends of the cables in sequence, and each cable will be given the desired tension. rment walls. Additional anchors in the cable ends adjacent the jack will be seated against the jackhead to hold the cables in tension.

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    Effectiveness of Different Types on Anti-Burst

    Effectiveness of Different Types on Anti-Burst Reinforcements for Achorage Zones of Post-Tensioned Concrete Slabs

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    History - DSI Underground Canada

    Cable Tensioner Mark2; HI-TEN Strand Bolt; Wedge Anchorage; Friction Stabilizers. ... prestressed iron tie by Dipl. Ing. Franz Dischinger, a predecessor of today’s prestressing technique ... The stressing operation is carried out using a 15,000kN stressing jack that was specially developed by DSI. Woodrow Wilson Bridge, Washington D.C., USA ...

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    US3022713A - Prestressed concrete structures - Google …

    Prestressed concrete structures Download PDF Info ... Grant status Grant Patent type. Prior art keywords concrete cable slab joint wires Prior art date 1954-11-26 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 ...

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    Stressing Catalogue - [PDF Document]

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    Hydraulic Jack YCWA Series YCWA series hydraulic jack is widely applied to pretensioning and post-tensioning. When equipped with different accessories, it is able to tension OVM multi-strand anchorage, DM heading anchorage and stay cable anchorage etc.

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    Investigations on corrosion and mechanical properties of …

    The tension test results of 33 strands, which were extracted from the exhumed cable, show that the tensile strengths of the steel strands, after 20 years of service, still exceed 1500 MPa as required by relevant standards.

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    Axial behaviour of prestressed high strength steel tubular

    Axial behaviour of prestressed high strength steel tubular members. ... Experiments on prestressed cable-in-tube elements in tension and compression were performed. ... An Enerpac PTJ-6S pneumatic stressing jack was used to prestress the cable-in-tube specimens.

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    VSL International Ltd. | Post-tensioning | Structural

    VSL, your construction partner for bridges, buildings, containment structures, ground engineering, geotechnical applications and industrial facilities.

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    bonded post tensioned concrete - Popular bonded post

    bonded post tensioned concrete Manufacturers Directory - find 53 bonded post tensioned concrete from bonded post tensioned concrete online Wholesalers for your sourcing needs from China. ... stressing and anchoring can be carried on to finish all the post-tension process, which ... Monostrand Hydraulic Jack suppliers Wholesale Mono Strand ...

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    Read VSL Technical Report - PT Incre.PDF text version

    Each jack pulled a cable 6-31 (breaking load approx. 8000 kN) anchored to a pair of steel girders specially installed at the end of every increment. The total weight to be launched near the end of the operation was about 11 500 tonnes.

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    Introduction to Pre Stressed Concrete (2nd Ed

    In very long stressing beds. The resulting prestressed concrete members are also frequently described as being either pre-tensioned or post-tensioned. the slack taken up and the load applied. when all the tendons have been positioned. A stressing jack is attached to the tendon. but the most effective use of pre-tensioning is in long-line ...

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    Chapter Two - Stay Cable Systems and Materials

    Read chapter Chapter Two - Stay Cable Systems and Materials: TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 353: Inspection and M...

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    Health Monitoring of Civil Infrastructures Designed with

    Post-tensioning and cable stays are essential elements of a bridge where they are installed. Pre-stressing steel is used in tunnels, concrete wind towers and in many building structures. There is a large demand for implementing health monitoring of structures.

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    CR4 - Thread: Post Tensioning Advice

    Macalloy 1030 Macalloy S1030 Post Tensioning System BAR & CABLE SYSTEMS. 2 The System ... For prestressed concrete construction, the ... Stressing procedures and jack details are available from Macalloy’s Technical Department. The formula for calculating the approximate

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    China ISO Certificated Stressing-End Anchorage for Post

    prestressing steel shall be seven-wire low relaxation strand for prestressed concrete, manufactured in accordance with astm a-416, free from corrosion, having a guaranteed ... anchor casting with plastic pocket former shall be used at all stressing ends where ... a calibration sheet shall accompany each jack-pump combination. if inconsistancies ...

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    BRIDGE CONSTRUCTION PRACTICES USING INCREMENTAL LAUNCHING Requested by: American Association of State Highway and Transportation Officials (AASHTO)

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    QYC Front-end Mono Strand Hydraulic jack - gaodetec.com

    Aug 07, 2010· Good Answer: There are two types of pre stressing, namely pre tensioning and post tensioning. Pre stressing means stressing before live loads are …

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    China ISO Certificated Stressing-End Anchorage for Post Tensioning, Find details about China Anchorage, Multistrand from ISO Certificated Stressing-End Anchorage for Post Tensioning - Tianjin Sunwin Prestressed Technique Co., Ltd.

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    Lecture 2.1 - Methods of Prestressing - Prestressed

    PC Strand Pusher Machine, Strand Pusher Machine, PC Strand Pushing Machine manufacturer / supplier in China, offering Post -Tensioning PC Strand Pusher Machine, Astma416 BS5896 Prestressed Concrete Steel Strand, 63/70MPa Electric Oil Pump Matched with Hydraulic Jack and so …

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    China High Strength Prestressed Anchoring Wedges Post

    Area of stressing cylinder: ... Flat Anchor QYC Front-end Mono Strand Hydraulic jack YDC Series of Tension Hollow Hydraulic Jack Metal Ducts Making Machine Oil Pump Prestressed Concrete Cable GYJ Extrusion Machine ...

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    Multistrands Stressing Jack and Pump for 12.7mm Prestressed Strand. ... Inquiry Basket. Multistrands Stressing Jack and Pump for 15.24mm Prestressed Cable. ... Post Tension Jack and Oil Pump.

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    Hazim Dwairi Dr. Hazim Dwairi The Hashemite University Methods of Prestressing 13 Prestressed Concrete Hashemite University Post--tensioning Sequence Post ¾ Casting of concrete. ¾ Placement of the tendons tendons. ¾ Placement of the anchorage block and jack. ¾ Applying tension to the tendons. ¾ Seating of the wedges. ¾ Cutting of the tendons.

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    China High Strength Prestressed Anchoring Wedges Post Tension, Find details about China Wedges Post-Tensioning, Single Hole Anchor Barrel and Wedge from High Strength Prestressed Anchoring Wedges Post Tension - Kaifeng Zhongqiao Prestressed Equipment Co., Ltd.

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