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  • Rock Bolts | DYWIDAG

    DYWIDAG Threadbar™ is used to bond unstable rock to stable sections beyond the rockface—providing both tensile and shear loading capacity. Due to the higher bond strength offered by rock, in comparison with soil, rock bolts can be installed into much smaller holes than soil nails or ground anchors—saving time and money.

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  • DYWIDAG GRP Anchors and Rock Bolts

    2013-9-17 · Rock Bolts range from cuttable rock bolts for underground coal mining or ground control for mechanical excavations to injection lances or forepoling. DYWIDAG-Systems International provides a diversified portfolio of GRP systems for various applications in Mining, Tunneling, and Civil Engineering which is completed by longtime experience

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  • DYWIDAG Rock Bolts - DSI EMEA

    Rock Bolts: Stabilize your project with fully grouted SN Anchors or DYWIDAG Expansion Shell Anchors. Click here for technical details. DYWIDAG Rock Bolts - DSI EMEA

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  • Rock Bolts - DYWIDAG-Systems International UK

    Rock Bolts are generally formed from solid threadbar systems, i.e. bar, nut, couplers and plates. The steel threadbar is used to bond unstable rock to stable sections, beyond the face, and requires both capacity for tensile and shear loads. Rock bolts are fully bonded and …

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  • Rock Bolt Properties - DSI Canada

    DYWIDAG Rock Bolts. System Description; Anchor Design; Anchor Installation; Rock Bolt Properties; DCP-Rock Bolt; DYWI ® Drill Hollow Bar System. General Notes, Installation Advantages; DYWI ® Drill Hollow Bar System Properties; Installation; Soil Nails; Temporary Ground Anchors; Rock Bolts & Spiles; Installation Accessories; Stressing and Testing; Micropiles. GEWI ® Micropiles

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  • Rock Bolt Properties - DSI USA

    DYWIDAG THREADBAR Properties and Hardware Dimensions. 27th March 2018. 265.50 KB Download.

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  • DYWIDAG Geotechnical Product Range

    2020-9-24 · (DYWIDAG) in 1865, and thus, back to the beginning of industrial construction. As a recognized market leader in Geotechnics in Germany and Europe, DYWIDAG offers all established systems in specialized civil engineering. The product range includes ground anchors, micropiles and soil and rock bolts. GEWl® and GEWl® Plus Threadbars that are threadable

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  • Geocomposites - DYWIDAG-Systems International UK

    The DYWIDAG supplied mesh range includes two products that are specifically designed for weathered rock or soil retention. High Tensile GREEN (G65/3) and Light Weight GREEN meshes incorporate a three dimensional polypropylene erosion control mat into the high-tensile steel wire mesh.

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  • Anchor Design - DSI Canada

    DYWIDAG THREADBAR ® prestressing steel is intended for use in high strength application to permit the maximum design load in each borehole. The use of prestressing steel may allow a reduction in the number of bolts in the pattern and thus, it usually reduces drilling costs.

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  • DYWIDAG Geotechnical Product Range

    2014-4-17 · DYWIDAG Threadbar Anchors are an actively tensioned ground anchor system and correspond to DIN 4125 and EN 1537 regulations. Due to the active tensioning, anticipated deformations of the system and deformations at the civil engineering measure are minimized or entirely eliminated.

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  • Rock Bolts and Meshes - DYWIDAG

    2020-11-9 · The location of rock bolts can be designed as a regular pattern, but the designer should be open to slight changes of position once work begins on site To maximise the potential for pre-loading the system, bolts should be placed in the lowest points on the rock face in order to make the most of the topography Due important for the mesh

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  • DYWIDAG Rock Bolts - DCP-Rock Bolt - DSI Canada

    DYWIDAG Rock Bolts - DCP-Rock Bolt The Rock Bolt for permanent Slope Stabilizations, Tunnels and Caverns (with angle compensation) High tensile and mild steel – DYWIDAG THREADBAR ® 1.

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  • DYWI Inject Systems - Anchors and Rock Bolts - Dywidag

    2013-9-27 · DYWI Inject SILO 8044 – Silicate Injection Resin for Anchors and Rock Bolts 9. ... DYWIDAG-Systems International GmbH Alfred-Wagner-Strasse 1 4061 Pasching/Linz, Austria Phone +43-7229-610 49 0 Fax +43-7229-610 49 80 E-mail [email protected]

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  • System Description - DSI Canada

    The DYWIDAG THREADBAR ® provides a simple, economical and rugged solution to both tensioned and non-tensioned rock bolts and rock anchors when installed within resin grout. DYWIDAG THREADBAR ® s for prestressing conforming to ASTM A 722 are available in 1 (26 mm), 1-1/4 (32 mm) and 1-3/8 (36 mm) nominal diameters.

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  • DYWIDAG Introduces Smart Anchor - DSI USA

    2021-7-27 · DYWIDAG Rock Bolts. System Description; ... With the same strength and function as traditional anchors, but with smarter slopes and foundation, DYWIDAG’s Smart Anchor sets the new standard for anchor applications. It is a smart solution designed to support a …

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  • Anchor Design - DSI USA - dsiamerica.com

    Anchor Design. DYWIDAG THREADBAR ® reinforcing steel is intended for use in relatively low strength rock bolt and rock dowel applications. DYWIDAG THREADBAR ® prestressing steel is intended for use in high strength application to permit the maximum design load in each borehole. The use of prestressing steel may allow a reduction in the number of bolts in the pattern and thus, it usually ...

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  • DYWIDAG Geotechnical Product Range - DSI Canada

    2019-4-30 · DYWIDAG Micropiles – GEWI ... is a function of temperature and magnetization A calibration process eliminates the impact of these variables The system considers the effect of the ... USA Rock mass was excavated to allow for the installation of a power

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  • Anchor Installation - DSI USA - dsiamerica.com

    Drill smallest diameter hole which is compatible with the bolt and cartridge diameter selected. Insert Resin Cartridges. Use fast setting resin for bond length. If full encapsulation is desired, use slow setting resin or cement grout in the upper length to accommodate stressing. Insert DYWIDAG THREADBAR®. Spin bar with drill tool at about 100 rpm.

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  • DYWIDAG THREADBAR® - Technical Data Imperial

    2018-5-28 · DYWIDAG THREADBARS - TECHNICAL DATA [IMPERIAL UNITS] April 16th, 2018, DSI Surrey, BC STEEL GRADE Nominal Bar Diameter Max. Bar ø Across Ribs Nominal Cross Section ... Rock Bolts Soil Nailing Precast Connections 3/4 #6 0.86 …

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  • DCP Bolt, 310 kN - DSI Civil

    Drill 43-45mm hole diameters. The drill hole length must be longer than the bolt by approx. 50mm. Domed washer plate is fitted to the bolt. The bolt is inserted into the hole. After placing the bolt in the hole to its full length, the bolt is then rotated to set the expansion shell to the required tension. Attach grouting adaptor to anchorage.

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  • DYWIDAG Introduces Smart Anchor - DSI USA

    2021-7-27 · DYWIDAG Rock Bolts. System Description; ... With the same strength and function as traditional anchors, but with smarter slopes and foundation, DYWIDAG’s Smart Anchor sets the new standard for anchor applications. It is a smart solution designed to support a …

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  • Stabilization of Rock Face with Rock Bolts | DYWIDAG

    The GEWI® Rock Bolts with their total length of 1,300m were used for securing the protective mesh, which was attached to the rock face.The GEWI® Rock Bolts were bored into the rock in individual lengths of approximately 3m, post-tensioned and subsequently injected with grout.

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  • DYWI Inject Systems - Anchors and Rock Bolts - Dywidag

    2013-9-27 · DYWI Inject SILO 8044 – Silicate Injection Resin for Anchors and Rock Bolts 9. ... DYWIDAG-Systems International GmbH Alfred-Wagner-Strasse 1 4061 Pasching/Linz, Austria Phone +43-7229-610 49 0 Fax +43-7229-610 49 80 E-mail [email protected]

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  • DYWIDAG Rock Bolts secure Tunnel for Mölltaler

    DYWIDAG Rock Bolts secure Tunnel for Mölltaler Glacier Express. The world's longest underground cable railway (length 4,796 m) provides an all-year service to the glacier ski-region of Carinthia. The tunnel starts at an altitude of 1,225 m and exits 1,000 m higher, opening an all-year ski resort up to an altitude of 3,105 m.

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  • Innovative solution using DYWIDAG Rock Bolts for

    2,390No. rock bolts 20 mm dia., grade 900/1100, THREADBARS ® - ultimate load 345 kN ; 5,330No. rock bolts 26.5 mm dia., grade 900/1030, THREADBARS ® - ultimate load 586 kN. The DYWIDAG Rock Bolting System has been very successful and continued use of the system is expected.

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  • DYWIDAG Geotechnical Product Range - DSI Canada

    2019-4-30 · DYWIDAG Micropiles – GEWI ... is a function of temperature and magnetization A calibration process eliminates the impact of these variables The system considers the effect of the ... USA Rock mass was excavated to allow for the installation of a power

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  • Anchor Installation - DSI USA - dsiamerica.com

    Drill smallest diameter hole which is compatible with the bolt and cartridge diameter selected. Insert Resin Cartridges. Use fast setting resin for bond length. If full encapsulation is desired, use slow setting resin or cement grout in the upper length to accommodate stressing. Insert DYWIDAG THREADBAR®. Spin bar with drill tool at about 100 rpm.

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  • (PDF) Notes on Rock Reinforcement Using Threadbar

    contractor usually assumed solid threadbar DSI [Dywidag] threadbar bolts, because that's what they are USED to seeing and using on other rockbolt jobs . So their winning bid would be 70K or 120K

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  • DYWIDAG THREADBAR® - Technical Data Imperial

    2018-5-28 · DYWIDAG THREADBARS - TECHNICAL DATA [IMPERIAL UNITS] April 16th, 2018, DSI Surrey, BC STEEL GRADE Nominal Bar Diameter Max. Bar ø Across Ribs Nominal Cross Section ... Rock Bolts Soil Nailing Precast Connections 3/4 #6 0.86 …

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  • History - DSI Underground Canada

    Anchors, Rock Bolts & Pre-Support. ... Creation of a Research & Development Department within DYWIDAG Systematic development of additional DYWIDAG systems such as bar, ground and rock anchors using 16mm Ø threabars and stay cable systems. DYWIDAG subsidiaries are founded in Austria, USA, Canada and Italy. ...

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  • DYWIDAG Rock Bolts secure Tunnel for Mölltaler

    DYWIDAG Rock Bolts secure Tunnel for Mölltaler Glacier Express DYWIDAG Rock Bolts secure Tunnel for Mölltaler Glacier Express DYWIDAG Rock Bolts secur...

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  • Extension of the BR 101 Motorway: DYWIDAG Rock

    Extension of the BR 101 Motorway: DYWIDAG Rock Bolts stabilize the Formigão Tunnel. A new road tunnel was recently opened in southern Brazil near Tubarão, a town that is located near the Atlantic coast. The Formigão Tunnel is the last of four new tunnels built during the widening of …

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  • Corrosion Protection of Rock Bolts by Epoxy coating and ...

    2020-10-13 · The bolts used for tests consisted of two types, i.e. 28mm rebar and 28mm continuous thread bar from Dywidag company. The bond length in each sample was 15 cm and the water:cement ratio used for the grout annulus was

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  • Permanent (DCP) Anchors - DSI Civil

    DYWIDAG Strand Anchors. Long-lasting system for permanent use (more than 100 years) DYWIDAG Strand Post-Tensioning System Anchor components. Bonded length can be pregrouted at the factory – partial grouting is also possible. Approved, Double Corrosion Protection (DCP) achieved by strands that are greased, individually sheathed and covered by ...

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  • Rock Bolts - Roof Bolts - Resin Anchoring - DSI ...

    DYWIDAG-Systems International Pty. Ltd. (DSI) is Australia’s largest manufacturer & supplier of specialist strata reinforcement & support products to the underground coal & metalliferous mining sectors.DSI is also a major exporter of these products to the Asia-Pacific Region.

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  • DYWIDAG Introduces Smart Anchor - DSI Civil

    2021-7-27 · DYWIDAG’s Smart Anchor’s unique, low-profile force measurement sensor monitors force distribution, inclination, and water level. It is secure and easily manageable from the cloud, built on Microsoft Azure technology, and delivers vital asset health data via plug-and-play sensors. Designed with asset owners, designers, and contractors in ...

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  • What are Rock Bolts? - Home Stratosphere

    Rock bolts have been used during underground excavation in the mining and tunneling industry for well over 100 years. They provide temporary roof support and also keep walls secure. Today, rock bolts are used in many other applications. These include reinforcing concrete dams, bridge abutments, rock cliffs, steep slopes, and stabilizing road cuts.

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  • Installation Quality Guidelines - DSI Underground

    Fillet on Forged Head Rebar - Forged head rebar bolts should be inspected to ensure a fillet of 1/8' radius is present where the shaft connects to the forged head. Sharp transitions may weaken the bolt. Shelf Life of Resin - Resin has a practical shelf life. Although the chemical ingredients do not change with time, most resin cartridges are water based and thus dry out with age.

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  • DCP Bolt, 310 kN - DSI Civil

    Drill 43-45mm hole diameters. The drill hole length must be longer than the bolt by approx. 50mm. Domed washer plate is fitted to the bolt. The bolt is inserted into the hole. After placing the bolt in the hole to its full length, the bolt is then rotated to set the expansion shell to the required tension. Attach grouting adaptor to anchorage.

    Get Price
  • Threadbar Properties - DSI Underground Canada

    70,000 lbs. (310 kN) 100,000 lbs. (445 kN) 2.67 lbs/ft. (3.98 kg/m) Also available hot dip galvanized to ASTM A123 and CSA G164 specifications. All mechanical and physical properties in accordance with ASTM A615-92b and CSA G30.18M-92 specifications. Threadbar is …

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  • Mechanical Anchors and Rebar Rock Bolts - Dywidag Norge

    2013-9-22 · Rock bolts such as SN-Anchors or the DYWIDAG THREADBAR® are fully grouted over the whole length and are usually installed untensioned. Generally, this does not apply to resin rock bolts, which can be actively pre-tensioned using resin cartridges with different curing times. Which rock bolt system is the best one

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  • DYWIDAG Rock Bolts secure Tunnel for Mölltaler

    DYWIDAG Rock Bolts secure Tunnel for Mölltaler Glacier Express. The world's longest underground cable railway (length 4,796 m) provides an all-year service to the glacier ski-region of Carinthia. The tunnel starts at an altitude of 1,225 m and exits 1,000 m higher, opening an all-year ski resort up to an altitude of 3,105 m.

    Get Price
  • The Mandacarú Tunnel in Bahia: DYWIDAG Rock Bolts

    The Mandacarú Tunnel in Bahia: DYWIDAG Rock Bolts secure Brazil’s Future as an Exporter. Brazil, the world’s second largest producer and exporter of soy beans after the USA, plans to increase both production and exportation in the years to come.

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  • Bond of cement grouted reinforcing bars under

    2005-1-1 · These are 20 mm Dywidag continuous thread (CT) bar and also 22 and 28 mm ribbed rock bolts (referred to as P22 and P28 hereafter) as shown in Fig. 1. The objective was to determine the bond capacity of these bolts to axial pull while radial confining pressure was held constant. Download : Download full-size image; Fig. 1.

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  • Field Observations of Rock Bolts in High Stress Rock ...

    2009-9-17 · In situ rock bolts are most loaded in the portion close to the collar of the borehole. In a dilating rock mass the maximum bolt load usually occurs at a distance of about 0.5 m from the face plate. Rock bolts are subject to both pull and shear loads in situ. The shear strength of a rock bolt is equally important as its tensile strength.

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  • Practical Rock Engineering Chapter 14 Rockbolts and Cables

    2018-9-21 · installation. For short term applications the bolts are generally left ungrouted. For more permanent applications or in rock in which corrosive groundwater is present, the space between the bolt and the rock can be filled with cement or resin grout. Dowels or anchor bars generally consist of deformed steel bars which are grouted into the rock.

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  • VSL soil and rock anchors - STRUCTURAL TECHNOLOGIES

    2020-7-6 · The temporary anchors only fulfil their function for a limited period, generally for a maximum of two years. The corrosion protection Category K1, K2 or K3 See chapter 1.1 The nature of the anchoring zone It is the nature of anchoring zone that gives its name to the anchor: soil anchor in loose soil or rock anchor in rock

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  • Spin-Lock Rock Anchors – Williams Form Engineering

    Spin-Lock Rock AnchorsWilliams Spin-Lock anchors were first used in the 1950’s for rock/roof bolting in projects such as NORAD and Australia’s SnowyMountain power facility. Since then many engineers, contractors and owners have seen the advantages of the Spin-Locks on dams, locks, water/waste treatment facilities and many other large scale ...

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  • Threadbar Properties - DSI Underground Canada

    70,000 lbs. (310 kN) 100,000 lbs. (445 kN) 2.67 lbs/ft. (3.98 kg/m) Also available hot dip galvanized to ASTM A123 and CSA G164 specifications. All mechanical and physical properties in accordance with ASTM A615-92b and CSA G30.18M-92 specifications. Threadbar is …

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  • DSI TECNICAS EN PRESFUERZO, S.A DE C.V. - Inicio -

    En DYWIDAG, nos dedicamos a brindarles a nuestros clientes un servicio cordial.Valoramos su negocio. Nuestra misión es ofrecer productos y servicios confiables con un enfoque orientado al cliente. Nuestro equipo atento y profesional puede brindar una variedad de servicios para satisfacer sus requisitos.

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