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  • GEWI ® - DYWIDAG-Systems International UK

    Rock Bolts. GEWI® Steel High Yield Threadbars are formed from a high tensile alloy steel. The bars are manufactured with a coarse left-hand thread over their full length. GEWI® couplers can provide a 100% load transfer between lengths of bar.

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  • GEWI ® Threadbar - DSI Underground Australia

    Key Features. This bolt is hot rolled with deformations that form a coarse left hand thread (10mm pitch) over its entire length. The threadbar form provides good load transfer properties. The continuous thread provides a high flexibility in 'fragile' ground and blasting conditions as …

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  • DYWIDAG Rock Bolts - DSI EMEA

    Expansion Shell Anchors Rock Bolts with Expansion Shell. Extremely fast and easy installation ; Immediate load bearing capacity in the borehole ; Galvanized version available ; Retensionable ; Various angle compensation designs available ; Posterior grouting is …

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  • New York Step-Street Stabilized Using GEWI ® Rock

    These bars were installed together with accessories such as hex nuts, eyebolts and anchor plates for use as rock anchors for stabilizing the steep slope wall above the step-street. The installation and grouting of the 21 ft (6.5m) long double corrosion protected GEWI® Bars were special challenges during this project.

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  • GEWI Plus Geotechnical Systems

    2019-4-30 · The. GEWI®Plusthreadbar is encapsulated in cement grout which acts both as corrosion protection and as load transfer into the soil or rock. Excellent load transfer into concrete structures by means of anchoring elements. Tensile, compressive and alternating loads can …

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  • GEWI Threadbar System High Yield Steel for

    2019-4-30 · Rock Bolts Soil Nails Temporary Ground Anchors to BS 8081 : 1989 Permanent Soil Nails Permanent Ground Anchors Plates Flat Plate Formed Plate up to 20° Articulating Plate up to 30° Gusseted Plate up to 45° Nuts Lock Nut Hexagonal Nut Flanged Nut Domed Nut Couplers Static Coupler Dynamic Coupler Contact Coupler Transition Coupler

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  • DYWIDAG Geotechnical Product Range

    2020-9-24 · Soil and Rock Bolts Bar and Strand Anchors ®GEWl® and GEWl Plus Piles Tie Rods Tie Rods and Braces Tie rod systems are used in all cases in which two or more points of a structure must be stabilized relative to one another. Earth filled dams that are laterally stabilized by driven sheet piles are stabilized by tiebacks at the head.

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  • DYWIDAG Geotechnical Product Range - GCS

    2018-9-10 · GEWI ® Pile GEWI® Plus ... proven their aptitude in terms of function and economy. ... GEWl® Soil and Rock Bolts ®DYWI Drill Soil and Rock Bolts …

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  • Resins - DYWIDAG-Systems International UK

    Resin cartridges are used with GEWI ® Steel and GRP rock bolts, where the bolt can be spun into the resin to achieve a full bond. The fast cure time of Fasloc ® resin cartridges offers installation benefits for roped access work, as well as for rail possessions or night closures.

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  • DYWIDAG Geotechnical Product Range - DSI Canada

    2019-4-30 · A GEWI®GEWIPile is a drilled and grouted micropile, with a diameter of less than 12 inches It is centrally reinforced with either one or a group of DYWIDAG THREADBARS The deformations on the bar transfer the load into the surrounding grout body and …

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  • New York Step-Street Stabilized Using GEWI ® Rock

    New York Step-Street Stabilized Using GEWI ® Rock Bolts New York Step-Street Stabilized Using GEWI ® Rock Bolts ...

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  • Mechanical Anchors, Resin and Rebar Rock Bolts - DSI ...

    Rock bolts limit the loosening of blocks out of the rock mass and shear displacements. Furthermore, the frictional force between individual rock layers is increased. Anchors with a variable anchor length enable pre-tensioning and thus an active force transmission. GEWI ® Mining Anchors and Mechanical Anchors Type ALWAG are wellestablished ...

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  • DYWIDAG Rock Bolts - DSI Middle East

    Expansion Shell Anchors Rock Bolts with Expansion Shell. Extremely fast and easy installation. Immediate load bearing capacity in the borehole. Galvanized version available. Retensionable. Various angle compensation designs available.

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  • System Description - DSI USA - dsiamerica.com

    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 Geotechnical Product Range - GCS

    2018-9-10 · GEWI ® Pile GEWI® Plus ... proven their aptitude in terms of function and economy. ... GEWl® Soil and Rock Bolts ®DYWI Drill Soil and Rock Bolts …

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  • Mechanical Anchors and Rebar Rock Bolts - Dywidag Norge

    2013-9-22 · Rock bolts limit the loosening of blocks out of the rock mass and shear displacements. Furthermore, the frictional force between individual rock layers is increased. Anchors with a variable anchor length enable pre-tensioning and thus an active force transmission. GEWI® Mining Anchors and Mechanical Anchors Type ALWAG are well-

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  • Products - DYWIDAG-Systems International UK

    Rock Bolts and Meshes. Stabilisation vs. Drapery. Passive Drapery Systems; Stabilisation Systems; Rock Bolts. GEWI ® GEWI ® Plus; Expansion Shell Anchors; Accessories. Bearing Plate; Resins; Grout Sock; Meshes. Key Features; Geocomposites; DYWI ® Mat; Wire Rope; DYWIDAG HCR Stainless Steel; Marine Rock Bolting - Marine Grade Meshes; DYWIDAG ...

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  • GEWI Steel Threadbars - DSI Civil

    2019-4-30 · GEWI® Standard GEWI® Steel Threadbars GEWI® Plus mm N/mm 2 kN kN kN mm 2 mm mm Kg m 16 121 101 85 201 18 8 1.58 20 188 157 132 314 23 10 2.47 25 295 246 206 491 28 12. 5 3.85 28 500 600 370 308 259 616 32 14 4.83

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  • DYWIDAG THREADBAR® - Technical Data Metric

    2018-5-28 · Micropiles (GEWI-Piles) Anchor Bolts Concrete Reinforcing Ground Anchors Seismic Anchors Rock Bolts Soil Nailing Precast Connections * Cold-Rolled Threadbar 19 #6 21.8 284 147 196 2.23 14.7 L 22 #7 25.1 387 200 267 3.04 18.3 L 25 #8 28.4 510 264 351 3.97 18.3 L …

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  • DYWIDAG Threadbar Anchors - DSI Civil

    DYWIDAG Bar Anchors. 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. This applies both to temporary structures ...

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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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  • Rock Bolts & Spiles - DSI USA

    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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  • DYWIDAG Geotechnical Product Range - DSI Canada

    2019-4-30 · GEWI® Standard GEWI® Steel Threadbars GEWI® Plus mm N/mm 2 kN kN kN mm 2 mm mm Kg m 16 121 101 85 201 18 8 1.58 20 188 157 132 314 23 10 2.47 25 295 246 206 491 28 12. 5 3.85 28 500 600 370 308 259 616 32 14 4.83

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  • GEWI Steel Threadbars - DSI Civil

    Perpendicular Installation - Bolts should be installed as near perpendicular to the rock surface as possible. Friction bolts should be installed within +/-10 degrees of the drilled hole orientation. Angles greater than this may lead to the friction bolt being bent along its length during installation reducing its anchorage capacity and affect the weld ring integrity by point loading within the ...

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  • Rock Bolts – Friction Bolt - Rock Bolts - Roof Bolts

    2018-5-28 · Micropiles (GEWI-Piles) Anchor Bolts Concrete Reinforcing Ground Anchors Seismic Anchors Rock Bolts Soil Nailing Precast Connections * Cold-Rolled Threadbar 19 #6 21.8 284 147 196 2.23 14.7 L 22 #7 25.1 387 200 267 3.04 18.3 L 25 #8 28.4 510 264 351 3.97 18.3 L …

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  • DYWIDAG THREADBAR® - Technical Data Metric

    2020-4-15 · View the sourcing details of the buying request titled Gewi Bolts, including both product specification and requirements for supplier. Made-in-China.com helps global buyers match their buying requests with the right supplier efficiently.

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  • Gewi Bolts - Easy Sourcing on Made-in-China.com

    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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  • Practical Rock Engineering Chapter 14 Rockbolts and Cables

    2017-4-1 · Rock bolts are the primary means of rock reinforcement for excavations in rock. Rock bolts reinforce the rock mass by one or more of the following methods: beam building, suspension of weak fractured ground to more competent layers, pressure arch, and support of discrete blocks (Hadjigeorgiou and Charette, 2001). The in situ behavior of rock ...

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  • Explicit reinforcement models for fully-grouted rebar

    Data Sheets Australia FASLOC ® X2 Resin Capsules 12 April 2017 366.41 KB Download FASLOC ® Two Speed Resin Anchor - TS 12 April 2017 280.45 KB Downloa...

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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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  • How Split set Rock Bolt and Friction Bolts Work

    Rock bolts are a type of drilled soil nail or anchor used when the ground to be stabilized consists mostly of rock materials. These types of inclusions are typically grouted in place and posttensioned, similar to soil anchors (Figure 15.8).The bolts hold potentially unstable jointed or fractured rock masses together in compression with bearing faceplates providing passive resistance, forming a ...

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  • Rock Bolt - an overview | ScienceDirect Topics

    2020-3-13 · FUNCTION PRINCIPLE ... (GEWI anchor) 3 anchor head Bore hole at least 1.5 x diameter of the anchor in poor rock Micro-pile with stabilization tube (Var. 2) consisting of: ... Ground plate with anchor head and tie bolts made from fl attened iron consisting of: 1 ground plate with tie bolts …

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  • Rock bolt | mining | Britannica

    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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  • SPIDER Avalanche - Fjerby

    2010-9-10 · Rock anchors are used commonly as part of retaining walls, and as part of a system to resist movement of a foundation. Most rock anchors consist of a pre drilled hole that is filled with grout material. A threaded steel anchor bar that is sheathed and is then inserted into the grouted hole and is tensioned to the appropriate specifications of the particular job.

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  • Paper: Laboratory full-scale rock bolt testing: Analysis ...

    2020-8-25 · 2. Ground control: supporting (rock-bolting, timbering, setting steel arches, etc.), scaling (removing rock fragments from working roofs). 3. Power supply and lighting 4. Drainage and flood control: pump stations and sumps are usually constructed at the bottom level to collect and drain water from underground after removing suspended solids. 5.

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  • VSL soil and rock anchors - STRUCTURAL TECHNOLOGIES

    The base of the post is secured to the foundation/subsurface through three bolts or rock anchors. Lateral Anchorage Lateral anchoring or internal anchoring of long sections of fences (as shown here) are achieved normally with two anchors having the main bearing ropes and the middle rope attached with brakes, thimbles and shackles.

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  • GEWI ® Pile System - DSI Civil

    Geotechnics - GEWI ® Pile System GEWI ® and GEWI ® Plus Piles are micropiles in accordance with DIN 4128 and EN 14199. Usually, they are not tensioned and act as a passive foundation system. A GEWI ® Threadbar is inserted into a borehole with a maximum diameter of 300mm and centered using a spacer. Afterwards, the borehole is filled or pressure grouted with cement mortar from the bottom up.

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  • DYWIDAG THREADBAR® - Technical Data Imperial

    2018-5-28 · Micropiles (GEWI-Piles) Anchor Bolts Concrete Reinforcing Ground Anchors Seismic Anchors Rock Bolts Soil Nailing Precast Connections * Cold-Rolled Threadbar 3/4 #6 0.86 0.44 33.0 44.0 1.50 48 L 7/8 #7 0.99 0.60 45.0 60.0 2.04 60 L 1 #8 1.12 0.79 59.3 79.0 2.67 60 L …

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  • GEWI Steel High Yield Threadbar System - Joostdevree.nl

    2010-8-13 · Steel High Yield Threadbar is a high tensile alloy steel bar which features a coarse left-hand thread over its full length. The system is proven worldwide and offers versatility in a range of applications.

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  • Permanent Anchors - DSI Civil

    Permanent Anchors. Long-lasting system for permanent use (more than 100 years) Approved, Double Corrosion Protection (DCP) achieved by grouted corrugated sheathing with controlled crack width. Anchor components in accordance with ETA 05/0123 (bar post-tensioning system) Approved, permanently sealed anchor head design with robust gaskets and caps.

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  • How Split set Rock Bolt and Friction Bolts Work

    W” Strap is commonly used when additional support is required in conjunction with mesh and rock bolts. These steel straps are pulled into the rock surface by the bolts and tend to conform to the rock ... Gewi Bar (1) Resin (1) Mesh (1) Plates (14) Dynamic Bolts (1) Cable Bolts (2) Chemical Bolts (1) Townsville – North Queensland. Phone: (07 ...

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  • Paper: Laboratory full-scale rock bolt testing: Analysis ...

    2017-4-10 · DYWIDAG Rock Bolts & Soil Nails GEWI® Piles DYNA Force® Load Monitoring System Cimentaciones Estructuras Hidraulicas y Marinas Pilas de hierro dúctil Tirantes Acerca de Principales Productos Aplicaciones Donde Marcas Claves Nuestros productos y sistemas geotécnicos ayudan a estabilizar los suelos y o

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  • “W” Strap - Split Set Mining Systems

    DYWIDAG-Systems International Pty Ltd has been Australia’s largest manufacturer and supplier of specialist ground reinforcement and support products since opening in 2002. In order to complete its product range for the civil market, DYWIDAG-Systems International has added specialized construction systems such as DYWIDAG Geotechnical products ...

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  • Sistemas DSI para micropilotes Diseño y Construcción

    2010-9-10 · Rock anchors are used commonly as part of retaining walls, and as part of a system to resist movement of a foundation. Most rock anchors consist of a pre drilled hole that is filled with grout material. A threaded steel anchor bar that is sheathed and is then inserted into the grouted hole and is tensioned to the appropriate specifications of the particular job.

    Get Price