Subtleties of CTS/TITAN Injection Anchors · consequently en 14199, clause 7.6.6 and en 14490,...
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BULLETIN BULLETIN BULLETIN BULLETIN BULLETIN BULLETIN BULLETIN BULLETIN May 2012 By Ernst Friedrich Ischebeck, Dipl. Ing. ISCHEBECK TITAN ® hollow bars are marketed in North America exclusively by Con-Tech Systems Ltd. as CTS/TITAN ® hollow bars. They are the most copied hollow bars in the world. The application of hollow bars for micropiles, soil nails and roof bolts was developed by ISCHEBECK GmbH, Ennepetal Germany, with registered patents from 1984 for this deveopment (DE 3400182, DE 3828335). TI- TAN Hollow Bar ® ,TITAN Bar ® , and TITAN Thread ® , are also registered trademarks in both Canada and the United States as of June 2011. In the meantime, the European Union (EU) has implemented two standards, according to the ‘EU Construction Products Directive’: EN 14199:2005 Micropiles and EN 14490:2010 Soil Nails. In Germany, additionally, a National Approval is mandatory for directly drilled and pressure grouted Micropiles. It concerns design, application and installation. Ischebeck Titan got this approval with number Z-34.14-209. It requires permanent independent production control, and identification marks on all components. It simplifies the application of Microplies for consultants, contractors and owners. The well known GEWI-bar for Micropiles is a solid hot-rolled thread bar with deformations. It has the German National Technical Approval and is accepted worldwide. It demonstrates that the National Technical Approval has promoted the application of the GEWI-bar and has given consultants, contrac- tors and owners confidence. In North America, only recommendations are available for hollow bars. They are published by the FHWA (Federal Highway Administration): for example: - Hollow-Bar-Soil-Nails Publication No. FHWA-CFL/TD-09-001, June 2009 - Hollow-Core-Soil-Nails/State of the Practice-Federal Highway Administration, April 2006 The dominating factor in hollow-bar pricing is steel quality. It is worthwhile to understand the require- ments for hollow-bars, as mandated by the above mentioned EU standards. EN 14199:2005 “Micropiles”, clause 6.2.1 and EN 14490:2010 “Soil Nails”, clause 6.2.2.2 require: Yield Stress, fyk, between 400 to 600 MPa (60 to 87 ksi) These are the same requirements as in the EU standards for reinforced concrete, EN 1080 “Rebar” and EN 1992-1:2004 (Eurocode EC2) “Design of concrete structures”. In the USA specifications ASTM A615 and ASTM A706 are applicable. The yield stress is limited to 600 MPA (87 ksi) for strain compatibility reasons in composite materials like reinforced concrete and composite Micropiles. The largest allowable strain for cement stone is limited to 0.003 (Euro Norms), or 0.0035 (ASTM A706) to avoid bursting (splitting) and longitudinal cracks in composite Micropiles. Consequently EN 14199, clause 7.6.6 and EN 14490, cluause 6.2.2.5, allow corrosion protection by cement stone cover (grout cover) alone only for steel yield stresses of less than 600 MPA (87 ksi). Subtleties of CTS/TITAN Injection Anchors On the requirements for hollow bars in geotechnical applications Visit us at: Superpile 2012 May 16 - 17. Portland, OR Windpower 2012 June 3 - 6. Atlanta, GA We are a member of: “Pioneering Geo-Technical Solutions”
Transcript of Subtleties of CTS/TITAN Injection Anchors · consequently en 14199, clause 7.6.6 and en 14490,...
Innovations For Your Advantage ...
B U L L E T I N B U L L E T I N B U L L E T I N B U L L E T I N B U L L E T I N B U L L E T I N B U L L E T I N B U L L E T I N
May 2012
By Ernst Friedrich Ischebeck, Dipl. Ing.
Ischebeck TITan® hollow bars are marketed in north america exclusively by con-Tech systems Ltd. as cTs/TITan® hollow bars. They are the most copied hollow bars in the world. The application of hollow bars for micropiles, soil nails and roof bolts was developed by Ischebeck Gmbh, ennepetal Germany, with registered patents from 1984 for this deveopment (De 3400182, De 3828335). TI-Tan hollow bar®,TITan bar®, and TITan Thread®, are also registered trademarks in both canada and the United states as of June 2011.
In the meantime, the european Union (eU) has implemented two standards, according to the ‘eU construction Products Directive’: en 14199:2005 Micropiles and en 14490:2010 soil nails.
In Germany, additionally, a national approval is mandatory for directly drilled and pressure grouted Micropiles. It concerns design, application and installation. Ischebeck Titan got this approval with number Z-34.14-209. It requires permanent independent production control, and identification marks on all components. It simplifies the application of Microplies for consultants, contractors and owners.
The well known GeWI-bar for Micropiles is a solid hot-rolled thread bar with deformations. It has the German national Technical approval and is accepted worldwide. It demonstrates that the national Technical approval has promoted the application of the GeWI-bar and has given consultants, contrac-tors and owners confidence.
In north america, only recommendations are available for hollow bars. They are published by the FhWa (Federal highway administration): for example: - hollow-bar-soil-nails Publication no. FhWa-cFL/TD-09-001, June 2009 - hollow-core-soil-nails/state of the Practice-Federal highway administration, april 2006The dominating factor in hollow-bar pricing is steel quality. It is worthwhile to understand the require-ments for hollow-bars, as mandated by the above mentioned eU standards.
en 14199:2005 “Micropiles”, clause 6.2.1 and en 14490:2010 “soil nails”, clause 6.2.2.2 require:
Yield stress, fyk, between 400 to 600 MPa (60 to 87 ksi)
These are the same requirements as in the eU standards for reinforced concrete, en 1080 “Rebar” and en 1992-1:2004 (eurocode ec2) “Design of concrete structures”. In the Usa specifications asTM a615 and asTM a706 are applicable.
The yield stress is limited to 600 MPa (87 ksi) for strain compatibility reasons in composite materials like reinforced concrete and composite Micropiles. The largest allowable strain for cement stone is limited to 0.003 (euro norms), or 0.0035 (asTM a706) to avoid bursting (splitting) and longitudinal cracks in composite Micropiles. consequently en 14199, clause 7.6.6 and en 14490, cluause 6.2.2.5, allow corrosion protection by cement stone cover (grout cover) alone only for steel yield stresses of less than 600 MPa (87 ksi).
Subtleties of CTS/TITAN Injection AnchorsOn the requirements for hollow bars in
geotechnical applicationsVisit us at:
Superpile 2012May 16 - 17. Portland, OR
Windpower 2012June 3 - 6.Atlanta, GA
We are a member of:
“Pioneering Geo-Technical Solutions”
Innovations For Your Advantage ...
cTs bulletin Page 2
high yield steels are not accepted for Micropiles and neither are oil field tubes according to en 11960, quality n80.
Ductility (elongation agt > 5% required by en 10080, asTM a615 , asTM a370)
Ductility means that in design calculation, assumptions for plastification and rotation of hinges are accepted. agt denotes the elongation up to ultimate load without reduction of cross-section. This is not to be confused with total elongation, a, up to rupture, as described in asTM a370 and stated on mill certificates. Usually elongation, a, has double the value of agt. The ductility of agt >5% is required for the finished hollow-bar, not for the steel tube it is manufatured from and which is given on the mill certificate of the steel mill.
Ductility can be checked on site by a bending test to 180 degrees as described in asTM 615a section 10.
charpy impact bending test with hollow bars (absorbed energy); (charpy impact testing according to asTM a370).
Drill Operators know that drill tools are forged from high yield, heat treated, ductile chrome-nickel alloy steels to withstand roto-percussion drilling and torques by deviation. hollow-bars from cr-ni alloys would be too expensive and would not fulfill the require-ments for re-bar. but damaging the hollow bar during installation must be avoided under all circumstances.
In order to avoid overloading of the bars during drilling, Ischebeck is using since the beginning, quality fine-grain structural steel s460 nh according to en 10210 “seamless Tubes”. This material has the highest available charpy impact bending resistance with more than 100 J (74 ft lbf) at 20 celcius (68 Fahrenheit) and still more than 40 J (29.5 ft lbf) at -20 celcius (-4 Fahrenheit). The success of the cTs/TITan hollow-bar is based on this tough and ductile steel since 25 years.
In comparison, other fine grain structural steels according to en 10210, e.g. s355, have a charpy impact bending resistance of only 27 J (20 ft lbf) at 20 celcius (68 Fahrenheit) and no resistance at all at -20 celcius (-4 Fahrenheit). Oilfield tubes for gas or petroleum don’t have impact bending resistance values comparable to s460 nh steel used by Ischebeck.
SUMMARY
To ensure that a hollow bar product is suitable for the task, technical data should be verified. Important quality parameters as outlined in this article are as follows:
• YieldandUltimateloadofthefinishedhollow-bar• Ductilityofthefinishedbar(AGTlargerthan5%)• Materialcomposition,asshownonmillcertsfromsteelmill• Charpyimpactbendingresistance
Other significant parameters include:
• Deformations,ribs,toincreaseshearbond(ASTMA615)• Ultimateloadofcoupledhollow-bars
Manufacturing quality parameters are:
• Testreportsfromindependentlaboratories• Permanentproductioncontrol• QualitymanagementsystemISO9001
Subtleties of CTS/TITAN ... continued
Con-Tech Systems Bulletin
“Pioneering Geo-Technical Solutions”
Innovations For Your Advantage ...
cTs bulletin
Employee’s Corner:
Service Award Recipients for December 2011:Marek Zawierucha: 20 years of service sonya schmitz: 15 years of service Jessica kane: 5 years of servicesai “Frank” Li: 5 years of service
We would like to thank everyone who attended our cTs/TeI hollow bar and anchor stressing school which took place from May 3-4, 2012 at the con-Tech systems Ltd. charlotte, nc facility. complete with seminars, case studies, demonstrations,testing,andBBQlunchthisinformativeschoolwasatremendoussuccess.Tothe35attendeeswhocame from far and wide to participate we would like to extend a heartfelt “thank you”! Many thanks also to TeI Rock Drills (Joe Patterson, Frank Moore, brian kassel, Mike Williams, and billy aller ) for their hard work in helping us co-
ordinate this two day school.
see you next year!
Introduing our new employees: Drew Disney: eastern Production Manager, Ontario, canada (as of Feb. 21, 2012).Drew brings with him 30 yrs of experience in manufacturing, engineering and maintenance. he also has extensive experience including project management, customer service and maintenance of industrial equipment & facilities. brent smith: Machine shop Manager, Ontario, canada (as of april 2, 2012)William holder: Machine shop staff, Ontario, canada (as of april 2, 2012)chris Love: Project coordinator , north carolina, Usa (as of Feb. 20, 2012)shanatia “shawn” barksdale: Production, north carolina, Usa (as of Feb. 6, 2012)
CTS/TEI Hollow Bar & Anchor Stressing School
Page 3Con-Tech Systems Bulletin
“Pioneering Geo-Technical Solutions”
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Horst Aschenbroich, President/C.E.O. [email protected]
Mobile: 604-250-8161 8150 River Road, Delta, BC V4G 1B5 CA
Tel. No. : 604-946-5571 Fax. No.: 604-946-5548
Neil Goulding, Sales & Project [email protected]
Mobile: 604-834-78688150 River Road, Delta, BC V4G 1B5 CA
Tel. No. : 604-946-5571 Fax. No.: 604-946-5548
Dan MacLean, [email protected]
Mobile: 613-802-1617 4502 Hanna Drive, Elizabethtown, ON K6T1A9 CATel. No.: 613-342-0041 Fax.No.: 613-342-0609
E-MAIL: [email protected] E-MAIL: [email protected]
Dennis Wiksten, Southeast [email protected]
Mobile: 727-992-41425738 Missouri Ave.
New Port Richey, FL 34656 USATel. No.: 727-842-5760 Fax No.: 727-842-5096
Drew Disney, Eastern Production [email protected]
Mobile: 613-802-07534502 Hanna Drive,
Elizabethtown, ON K6T1A9 CATel. No.: 613-342-0041 Fax.No.: 613-342-0609
Joe Alter, Southwest Sales [email protected]
Mobile: 619-894-261624424 Manzanita Drive, Descanso, CA 91916, USA
Tel. No.: 619-659-9931 Fax.No.: 619-659-9932
Denny Ambio, Sales & Project [email protected]
Mobile: 570-807-9617160-1001 Seven Bridge Rd.,East Stroudsburg, P.A.
18301,USA .Tel. No.:570-872-9090 Fax: 570-872-9091
David Hillman, Sales & Project [email protected]
Mobile: 604-834-09678150 River Road, Delta, BC V4G 1B5 CA
Tel. No. : 604-946-5571 Fax. No.: 604-946-5548
Kent Walker, Branch Manager, Southeast Sales [email protected]
Mobile: 704-506-84721832 University Commercial Place, Charlotte, N.C., USA
Tel. No. : 704-494-3989 Fax. No.: 704-494-3990
Marek Zawierucha, Western Production & Equipment Manager
[email protected]: 604-834-0971
8150 River Road, Delta, BC V4G 1B5 CATel. No. : 604-946-5571 Fax. No.: 604-946-5548
Community Involvement:
since 2008, we are proud to have helped support young athletes on their journey to attend the special Olympics through the Delta Police – british columbia Law enforcement “Torch Run for special Olympics”. This year we also donated to the special Olympics canada Winter Games which were held in st. albert, alberta from
February 28 to March 3, 2012.
Three of the athletes from Delta who attended the special Olympics in st. albert are as follows:
- Garrett Baydala (Floor Hockey Team – BC Avalanche) – won: silver (Division c). Funding for Garrett was sponsored by con-Tech systems Ltd.- Cory Duhaime (Alpine Skiing) – won: bronze in each of the Giant slalom, slalom, and super Giant slalom- Allison Le (Figure Skating) - was Team bc’s youngest athlete and enjoyed her first experience at a national Games in figure-skating, and finished just off the podium in fourth place.
On behalf of everyone at Con-Tech Systems Ltd. we congratulate Garrett and his team mates on their amazing achievements! For more information please visit: specialolympics.bc.ca
Yves Chartrand, Supply Chain [email protected]
Mobile: Cell 604 834-0970 8150 River Road, Delta, BC V4G 1B5 CA
Tel. No. : 604-946-5571 Fax. No.: 604-946-5548
Brent Smith, Machine Shop [email protected]
Mobile: 613-802-14434502 Hanna Drive, Elizabethtown, ON K6T1A9 CA
Tel. No.: 613-342-0041 Fax.No.: 613-342-0609
Donna Wallingham, Director of Finance & Administration
[email protected] 8150 River Road, Delta, BC V4G 1B5 CA
Tel. No. : 604-946-5571 Fax. No.: 604-946-5548
Contact Us:
“Pioneering Geo-Technical Solutions”
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