DYWI Drill Expansion Bolt Type T
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Contents Introduction... 3 Fields of Application... 4 Main Advantages... 4 System Description... 4 System Components... 5 Technical Data... 6 Technical Features... 6 Installation Procedure... 7 Accessories... 7 Further References... 7 Order Information... 7 Introduction Within the last few years, various so-called one-step rock bolt systems have been developed. This is a result of steadily increasing demands on rock bolting procedures in underground Mining and Tunneling and the ensuing higher demand for self-drilling rock bolts. The self-drilling rock bolt product family has now been extended by providing an expansion element for the DYWI Drill Hollow Bar System. The key factor for the success of this rock bolt is the combination of the longterm proven DYWI Drill Hollow Bar with a robust and innovative expansion element. The DYWI Drill Expansion Bolt is installed self-drilling; borehole drilling and bolt installation are accomplished in one operational step. The system s adaptability to changing rock and ground conditions is an important feature of the DYWI Drill Expansion Bolt. Immediately after the self-drilling installation, an activation of the expansion element leads to immediate load-bearing capacity. The DYWI Drill Expansion Bolt can be optionally tensioned following the fixation of plate and nut. Subsequent grouting, de-coupled from the actual installation procedure, permits further optimization of installation cycle times. The DYWI Drill Expansion Bolt is available in two different versions. Type M is mainly used for systematic rock bolting in underground Mining (see separate brochure). Type T is used for rock bolting in hanging wall areas and in applications that require an extension of bolts using couplings. 3
Fields of Application Mining Systematic rock reinforcement Rock bolting in remote areas or areas of difficult access Supplementary bolting Utility and hanger bolts Tunneling Rock bolting in underground caverns Face bolts Driving in critical ground conditions Squeezing ground Civil Engineering Rock fall and rock slide protection Anchorage of avalanche barriers Reinforcement of excavation pits and retaining walls Main Advantages Simultaneous drilling and installation Installation using standard drilling machinery Immediate load-bearing capacity after installation and activation of the expansion element Reduction of cycle time due to the de-coupling of the grouting procedure from installation Ability to maintain load-bearing capacity even when undergoing large deformations Tough system components Safe, easy, and reproducible installation procedure Improved drilling accuracy thanks to the directional guidance of the self-drilling expansion element Trouble-free application in unstable borehole conditions Easy extension using couplings Design and diameter of the expansion element can be adjusted to suit different and varying ground conditions System Description Expansion bolt: mechanically anchored and fully grouted Self-drilling installation based on the principle of the DYWI Drill Hollow Bar System Hollow bar with continuous cold-rolled left-hand outside thread utilized as drill rod during installation Rotary-percussive installation using standard underground drilling machines Conventional or automated installation Immediate load-bearing capacity via the mechanical end anchorage Subsequent optional grouting feature Flexible application range from 210 to 800 kn: R32-210 to R51-800 Type T: version for rock bolting in hanging wall areas or for larger bolt lengths, permits coupled installation Type T: utilization of several subsequently aligned expansion elements allows a higher load-bearing capacity even in weak ground DYWI S-D Expansion Bolt Type T, R32-051 DYWI S-D Expansion Bolt Type T, R38-076 DYWI S-D Expansion Bolt Type T, R38-076, with two coupled expansion elements 4
System Components Type T DYWI Drill Bit Single-use drill bits in different diameters and designs Hardened or carbide inserts DYWI Drill S-D Expansion Element Type T Standard hollow bar diameters: R32, R38 and R51 R38 and R51: several coupled expansion elements can be used DYWI Drill Hollow Bar R32, R38 or R51 Used as drill rod during installation Type R32-210 to R51-800 DYWI Drill Coupling Optional extension Continuous inside thread with middle stop Controlled drilling energy transmission Full load bearing capacity Domed plate Different designs and dimensions available on request DYWI Drill Nut Drive adapter Couplings in different versions Ready-for-use DYWI S-D Expansion Bolt Type T, R32-051 Ready-for-use DYWI S-D Expansion Bolt Type T, R38-076 5
Technical Data Series R32 No. Characteristic Value/Type 1) Symbol Unit R32-210 R32-250 R32-280 R32-320 R32-360 R32-400 1 Nominal external diameter Ø e.nom [mm] 32 2 Actual external diameter Ø e [mm] 31.1 3 Average internal diameter 2) Ø i [mm] 21.0 20.0 18.5 16.5 15.0 12.5 4 Nominal cross-sectional area 3) S 0 [mm²] 340 370 410 470 510 560 5 Nominal weight 4) m [kg/m] 2.65 2.90 3.20 3.70 4.00 4.40 6 Yield load 5) F p0.2.nom [kn] 160 190 220 250 280 330 7 Ultimate load 5) F m.nom [kn] 210 250 280 320 360 400 8 Yield strength 6) R p0.2 [N/mm²] 470 510 540 530 550 590 9 Ultimate strength 6) R m [N/mm²] 620 680 680 680 710 710 10 R m /R 7) p0.2 [1] 1.15 11 Ultimate load strain 7) A gt [%] 5.0 12 Thread standard [ ] ISO 10208 13 Standard bar length 8) [m] 2/3/4/6 14 Article No. 9) [ ] 30101YYY10X0 Technical Data Series R38 and R51 No. Characteristic Value/Type 1) Symbol Unit R38-420 R38-500 R38-550 R51-550 R51-660 R51-800 1 Nominal external diameter Ø e.nom [mm] 38 51 2 Actual external diameter Ø e [mm] 37.8 49.8 3 Average internal diameter 2) Ø i [mm] 21.5 19.0 17.0 34.5 33.0 29.0 4 Nominal cross-sectional area 3) S 0 [mm²] 660 750 800 890 970 1150 5 Nominal weight 4) m [kg/m] 5.15 5.85 6.25 6.95 7.65 9.00 6 Yield load 5) F p0.2.nom [kn] 350 400 450 450 540 640 7 Ultimate load 5) F m.nom [kn] 420 500 550 550 660 800 8 Yield strength 6) R p0.2 [N/mm²] 530 530 560 510 560 560 9 Ultimate strength 6) R m [N/mm²] 640 670 690 620 680 700 10 R m /R 7) p0.2 [1] 1.15 11 Ultimate load strain 7) A gt [%] 5.0 12 Thread standard [ ] ISO 10208 ISO 1820 13 Standard bar length 8) [m] 2/3/4/6 14 Article No. 9) [ ] 30201YYY10X0 30301YYY10X0 1) Status: 2012-06, note: all values are subject to change 2) Calculated from the actual external diameter, the average thread height, and the nominal cross-sectional area, rounded 3) Calculated from the nominal weight: S 0 = 106 x m/7,850 [kg/m 3 ] 4) Deviation: -3/+9 [%] 5) Characteristic 5 %-fractile value 6) Calculated from the characteristic load value and nominal weight, rounded 7) Characteristic 10 %-fractile value 8) Off-size bar lengths are available on request / modulus of elasticity: 205,000 [N/mm 2 ] 9) YYY... Ultimate Load/10 [kn]; X... hollow bar length [m] Technical Features Adjustment of the single-use DYWI Drill bits to different rock conditions and applications Reliable anchorage in the toe area due to a widening of the expansion element Free length systems available on request Compression tube anchor version available on request 6
Installation Procedure Type T Assembly of the DYWI Drill Expansion Bolt Type T and connection of the drive adapter to the rock drill Rotary percussive self-drilling installation (counterclockwise rotation) without casing: single-use drill bit and hollow bar drill steel, water or air-water mixture flushing Optional extension using couplings Activation of the expansion element after the final drilling depth has been reached: withdrawal of the rock drill with hammer strokes De-coupling of the drive adapter Fixation and assembly of anchorage (plate and nut) Optional de-coupled post injection Accessories Centralizers Sleeves for free length systems Rock drilling equipment: shank adapters, couplings, and coupling adapters Grouting adapters DSI cement grout Mortar-Mixing pumps Flow-Pressure meters Stressing, pre-loading, or pull testing equipment Further References Leaflet DYWI Drill Hollow Bar System DSI leaflet on drill bits for the DYWI Drill Hollow Bar System Approval for application as soil nail for temporary and semi-permanent application by the Austrian Federal Ministry of Transport, Innovation and Technology, Vienna, GZ: BMVIT-327.120/0010-IV/ST2/2012 European Technical Approval (ETA) as rock and soil nail for temporary and permanent application, currently in preparation (ETA application: GZ OIB-240-007/09) Order Information Description Article No. S-D Expansion Bolt Type T, R32-051 301050043051 S-D Expansion Bolt Type T, R32-076 301050044076 S-D Expansion Bolt Type T, R38-095 301050044095 S-D Expansion Bolt Type T, R51-125 301050044125 7
EMEA 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 alwag@dywidag-systems.at www.alwag.com North America DSI Underground Systems Inc. 9786 S Prosperity Road West Jordan, UT 84081, USA Phone +1-801-973 7169 Fax +1-801-973 7172 E-mail dsiunderground@dsiunderground.com www.dsiunderground.com South America DSI Chile Industrial Ltda. Las Encinas #1387, Valle Grande Lampa, Santiago de Chile, Chile Phone +56-2-596 96 20 Fax +56-2-596 96 69 E-mail informaciones@dywidag-systems.cl www.dsi-chile.com APAC/ASEAN DYWIDAG-Systems International Pty. Ltd. 25 Pacific Highway Bennetts Green, NSW 2290, Australia Phone +61-2-49 48 90 99 Fax +61-2-49 48 99 56 E-mail dsi@dywidag.com.au www.dsiminingproducts.com/au Please note: This brochure serves basic information purposes only. Technical data and information provided herein shall be considered non-binding and may be subject to change without notice. We do not assume any liability for losses or damages attributed to the use of this technical data and any improper use of our products. Should you require further information on particular products, please do not hesitate to contact us. "ALWAG" (AM 952/79), "AT" (AM 6138/2003), "AT-SYSTEM (AM 6139/2003), "DYWI " (4197869), "LSC" (AM 4326/2008), "OMEGA-BOLT " (3258282), "POWER SET" (AM 6163/2002), and "TUBESPILE" (AM 4328/2008) are registered trademarks of DYWIDAG-Systems International GmbH. "Combi Coat " and "CT-Bolt" are trademarks of Vik Ørsta AS. DYWIDAG-Systems International GmbH is a partner of Vik Ørsta AS. Austria Argentina Australia belgium Bosnia and herzegovina Brazil Canada Chile Colombia Costa Rica Croatia Czech republic Denmark Egypt estonia Finland France Germany Greece GUATEMALA HONDURAS Hong Kong Indonesia Italy Japan Korea Lebanon Luxembourg Malaysia Mexico Netherlands Norway Oman Panama Paraguay Peru POLAND Portugal Qatar Saudi Arabia singapore South Africa Spain Sweden Switzerland Taiwan Thailand Turkey United Arab Emirates United kingdom Uruguay USA Venezuela 04348-1/03.13-web-he