DYWIDAG Removable Anchor Systems

Transcription

1 DYWIDAG Removable Anchor Systems

2 We do not only talk about service we offer it! As a service provider DSI offers professional support by experts and the training of installation Personnel on site. Our goal is to fulfill your expectations day by day. 2

3 Contents Introduction... 4 Main Applications... 4 General Concept... 4 Tension Type Anchor... 4 Compression Type Anchor... 5 DYWIDAG Removable Strand Anchors... 6 Partially Removable Strand Anchor IHM (Inductive Heat Method)... 6 Partially Removable Strand Anchor MPM (Mechanically Processed Method)... 8 Removable Strand Anchor DYWIDAG QuickEx DYWIDAG Removable Threadbar Anchors Threadbar Anchor with Removable Free Length Threadbar Anchor with Completely Removable Tendon References DYWIDAG Removable Strand Anchors References DYWIDAG Removable Threadbar Anchors DSI Your independent System Supplier and competent Partner for Civil Engineering. 3

4 Introduction Numerous projects require anchors to be removable after use to ease future excavation and drilling works in these areas. Strand or bar anchors are fabricated from a very high steel grade. Anchors left in the ground after use can cause difficulties in future drilling and excavating procedures since most drilling/excavating equipment is not equipped to cut/bore through prestressed steel. In an increasing number of geotechnical projects, the steel tendon needs to be removed after use. In some areas, only the free length has to be removed, whereas in other areas, the removal of the complete steel tendon is required. Main Applications Excavations Temporary Tiebacks Stabilization of Construction Stages Urban Construction General Concept From a technical point of view DYWIDAG Anchors can be divided into tension type and compression type anchors. Tension Type Anchor A typical tension type anchor can be divided into two main areas, the anchor free length and the anchor bond length. Within the anchor bond length the strand/bar is bare and surrounded by grout. Within the anchor free length the anchor is unbonded. Having an anchor free length is a basic need when active stressing of an anchor is required. When stressing the anchor the forces within the strand/bar are constant until reaching the transition area between free- and bond length. Within the bond length the forces are transferred step by step to the surrounding grout matrix. The grout matrix typically is tension loaded which leads to radial cracks. From the grout matrix the stressing loads are transferred to the surrounding soil body. The picture on the right shows a typical bond stress distribution along the anchor bond length. In general, the bond behaviour between grout matrix and soil body is the governing criteria Unbonded Tendon to derive the necessary anchor bond length. Soil bond values can be derived Bond Stress Anchor Free Length Anchor Bond Length Free Steel Length Bare Tendon Grout through standardized testing procedures like investigation and/or suitability tests. 4

5 General Concept of DYWIDAG Anchors Compression Type Anchor A compression type anchor consists of an unbonded strand/bar which transfers the applied loads from the stressing jack directly to a structural element at the distal end of the anchor. From there, the stressing loads are transferred via compression bodies into the grout matrix. In this case the grout matrix is compression loaded. From the grout matrix the loads are transferred into the soil body. As it can be seen in the drawing on the right, the bond behaviour between grout matrix and soil body is the governing criteria to derive the anchor bond length. Due to the fact that the grout matrix is compression loaded, the compression body length is usually shorter than the anchor bond length. The grout area in front of the compression bodies acts hereby like a compressive grout strut which is needed to transfer the stressing loads into the surrounding soil body. The anchor bond length which depends on soil bond values can be derived through standardized testing procedures like investigation and/or suitability tests. Unbonded Tendon Anchor Free Length Free Steel Length CBL: Compression Body Length Bond Stress Grout CBL Anchor Bond Length Compression Body Length * 5

6 DYWIDAG Removable Strand Anchors Partially Removable Strand Anchor IHM (Inductive Heat Method) PE Tube, Protected Strand Overlap Anchor Head Unbonded Strand Predetermined Breaking Point Bare Strand Grout Body Spacer Anchor Free Length Anchor Bond Length Technical Data DYWIDAG Prestressing Steel, Inductive Heat Method Ø 15.3mm / 0.6" [140mm²] No. of Strands Cross Sectional Area Ultimate Y 1770 Standard Lockoff A F pk = F pk /1.3 60% F pk F pk = F pk /1.3 60% F pk [mm²] [kn] [kn] [kn] [kn] [kn] [kn] [kg/m] Ultimate Y 1860 High Grade Lockoff Weight , , , ,330 1, ,407 1, ,120 1,520 1, ,608 1, ,260 1,710 1,315 1,026 1,809 1,392 1, ,400 1,900 1,462 1,140 2,010 1,546 1, ,540 2,090 1,608 1,254 2,211 1,701 1, ,680 2,280 1,754 1,368 2,412 1,855 1, ,820 2,470 1,900 1,482 2,613 2,010 1, ,960 2,660 2,046 1,596 2,814 2,165 1, ,100 2,850 2,192 1,710 3,015 2,319 1, ,240 3,040 2,338 1,824 3,216 2,474 1, ,380 3,230 2,485 1,938 3,417 2,628 2, ,520 3,420 2,631 2,052 3,618 2,783 2, ,660 3,610 2,777 2,166 3,819 2,938 2, ,800 3,800 2,923 2,280 4,020 3,092 2, ,940 3,990 3,069 2,394 4,221 3,247 2, ,080 4,180 3,215 2,508 4,422 3,402 2,

7 DYWIDAG Removable Strand Anchors Partially Removable Strand Anchor IHM (Inductive Heat Method) Key Features Tension type anchor with removable free length Only bonded strand length remains in the soil Predetermined breaking points at each strand in the transition from bonded to free length The predetermined breaking points achieved by an innovative and patented inductive heat procedure The anchor can be removed by stressing until strand rupture occurs at the predetermined breaking point Slender system high forces despite small boreholes and simple handling High quality control in the production line ensures high reliability and precision in the removal process Technical Data DYWIDAG Prestressing Steel, Inductive Heat Method Ø 15.7mm / 0.62" [150mm²] No. of Strands Cross Sectional Area Ultimate Y 1770 Standard Lockoff A F pk = F pk /1.3 60% F pk F pk = F pk /1.3 60% F pk [mm²] [kn] [kn] [kn] [kn] [kn] [kn] [kg/m] Ultimate Y 1860 High Grade Lockoff Weight , , , , ,050 1,428 1, ,505 1, ,200 1,632 1, ,720 1,323 1, ,350 1,836 1,412 1,102 1,935 1,488 1, ,500 2,040 1,569 1,224 2,150 1,654 1, ,650 2,244 1,726 1,346 2,365 1,819 1, ,800 2,448 1,883 1,469 2,580 1,985 1, ,950 2,652 2,040 1,591 2,795 2,150 1, ,100 2,856 2,197 1,714 3,010 2,315 1, ,250 3,060 2,354 1,836 3,225 2,481 1, ,400 3,264 2,511 1,958 3,440 2,646 2, ,550 3,468 2,668 2,081 3,655 2,812 2, ,700 3,672 2,825 2,203 3,870 2,977 2, ,850 3,876 2,982 2,326 4,085 3,142 2, ,000 4,080 3,138 2,448 4,300 3,308 2, ,150 4,284 3,295 2,570 4,515 3,473 2, ,300 4,488 3,452 2,693 4,730 3,638 2,

8 DYWIDAG Removable Strand Anchors Partially Removable Strand Anchor MPM (Mechanically Processed Method) PE Tube, Protected Strand Overlap Anchor Head Unbonded Strand Predetermined Breaking Point Bare Strand Grout Body Spacer Anchor Free Length Anchor Bond Length Technical Data DYWIDAG Prestressing, Mechanically Processed Method Ø 15.3mm / 0.6" [140mm²] No. of Strands Cross Sectional Area Ultimate Y 1770 Standard Yield Y 1860 High Grade Ultimate Lockoff Yield R 60% F pk F pk F id = p0.1k /1.15 Lockoff 60% F pk Weight R A F pk F id = p0.1k /1.15 [mm²] [kn] [kn] [kn] [kn] [kn] [kn] [kn] [kg/m] , , ,239 1, ,302 1, ,120 1,416 1,248 1, ,488 1,312 1, ,260 1,593 1,404 1, ,674 1,476 1,283 1, ,400 1,770 1,560 1,357 1,062 1,860 1,640 1,426 1, ,540 1,947 1,716 1,492 1,168 2,046 1,804 1,569 1, ,680 2,124 1,872 1,628 1,274 2,232 1,968 1,711 1, ,820 2,301 2,028 1,763 1,381 2,418 2,132 1,854 1, ,960 2,478 2,184 1,899 1,487 2,604 2,296 1,997 1, ,100 2,655 2,340 2,035 1,593 2,790 2,460 2,139 1, ,240 2,832 2,496 2,170 1,699 2,976 2,624 2,282 1, ,380 3,009 2,652 2,306 1,805 3,162 2,788 2,424 1, ,520 3,186 2,808 2,442 1,912 3,348 2,952 2,567 2, ,660 3,363 2,964 2,577 2,018 3,534 3,116 2,710 2, ,800 3,540 3,120 2,713 2,124 3,720 3,280 2,852 2, ,940 3,717 3,276 2,849 2,230 3,906 3,444 2,995 2, ,080 3,894 3,432 2,984 2,336 4,092 3,608 3,137 2,

9 DYWIDAG Removable Strand Anchors Partially Removable Strand Anchor MPM (Mechanicallly Processed Method) Key Features Tension type anchor with removable free length Only bond length remains in the soil Predetermined breaking point at each strand in the transition from bond to free length The predetermined breaking point is achieved by a mechanical process, which leads to a local reduction of the steel section area The anchor is removed by stressing until strand rupture occurs at the predetermined breaking point Slender system high forces despite small boreholes and simple handling High quality control in the production line ensures high reliability and precision in the removal process Technical Data DYWIDAG Prestressing, Mechanically Processed Method Ø 15.7mm / 0.62" [150mm²] No. of Strands Cross Sectional Area Ultimate Y 1770 Standard Yield Y 1860 High Grade Ultimate Lockoff Yield R 60% F pk F pk F id = p0.1k /1.15 Lockoff 60% F pk Weight A F pk = /1.15 [mm²] [kn] [kn] [kn] [kn] [kn] [kn] [kn] [kn] [kg/m] ,137 1, ,196 1, ,050 1,327 1,169 1, ,395 1,230 1, ,200 1,516 1,336 1, ,594 1,406 1, ,350 1,706 1,503 1,307 1,024 1,794 1,581 1,375 1, ,500 1,895 1,670 1,452 1,137 1,993 1,757 1,528 1, ,650 2,085 1,837 1,597 1,251 2,192 1,933 1,681 1, ,800 2,274 2,004 1,743 1,365 2,391 2,108 1,833 1, ,950 2,464 2,171 1,888 1,478 2,591 2,284 1,986 1, ,100 2,653 2,338 2,033 1,592 2,790 2,460 2,139 1, ,250 2,843 2,505 2,178 1,706 2,989 2,636 2,292 1, ,400 3,032 2,672 2,323 1,819 3,189 2,811 2,445 1, ,550 3,222 2,839 2,469 1,933 3,388 2,987 2,597 2, ,700 3,411 3,006 2,614 2,047 3,587 3,163 2,750 2, ,850 3,601 3,173 2,759 2,161 3,786 3,338 2,903 2, ,000 3,790 3,340 2,904 2,274 3,986 3,514 3,056 2, ,150 3,980 3,507 3,050 2,388 4,185 3,690 3,208 2, ,300 4,169 3,674 3,195 2,502 4,384 3,865 3,361 2,

10 DYWIDAG Removable Strand Anchors Removable Strand Anchor DYWIDAG QuickEx PE Tube, Protected Strand Overlap Anchor Head Single Sheathed Strands Fix Tape Compression Bodies Compression Body Length Total Length Anchor Bond Length Compression Body PE Sheating Threaded and Extruded Grip Footbox No. of Strands Outer Diameter Compression Bodies Minimum Compression Body Length 1) Min. Outer Drilling Casing Diameter [mm] [mm] [mm] , , , , ,600 1) Minimum compression body length for a load level equal to the maximum proof load level of 80%F pk =223.2 [kn] per strand and assuming a minimum compressive grout strength of f c,cube > 30 N/mm² Technical Data DYWIDAG Prestressing Steel Ø 15.3mm / 0.6" [140mm²] No. of Strands Crosssectional area Ultimate Y 1770 Standard Yield Y 1860 High Grade Ultimate Lockoff Yield R 60% F pk F pk F id = p0.1k /1.15 Lockoff 60% F pk Weight A F pk = /1.15 [mm²] [kn] [kn] [kn] [kn] [kn] [kn] [kn] [kn] [kg/m] , ,239 1, ,302 1, ,487 1,310 1, ,562 1,378 1, ,735 1,529 1,329 1,041 1,823 1,607 1,398 1,

11 DYWIDAG Removable Strand Anchors Removable Strand Anchor DYWIDAG QuickEx Key Features Compression type anchor according to DIN 4125, EN1537 and DIN SPEC Strands are fully removable due to the PE tube cover along the full anchor length Patented anchorage system ensures easy and safe removal of the anchors Strands can be removed within a few minutes Only PE tubes, compression bodies and end anchorage remain in the ground, which do not disturb subsequent construction works (pile driving, excavation, TBM) Patented compression body design ensures load transfer from the strands to the grout body Removal is carried out by technicians using conventional tensioning equipment Strands are not greased no grease pollution disturbs later removal process Removability can be tested directly before applying the final stressing load by twisting the strands Anchors are delivered coiled on pallets Easy removal also in case of limited space conditions Simple handling on site Removal Principle 1. Extruded grip position during stressing and after applying the final lock-off load 2. After releasing the force to zero, start rotating strands to dissolve the extruded grips from the footbox 3. Remove strands manually Technical Data DYWIDAG Prestressing Steel Ø 15.7mm / 0.62" [150mm²] No. of Strands Crosssectional area Ultimate Y 1770 Standard Yield Y 1860 High Grade Ultimate Lockoff Yield R 60% F pk F pk F id = p0.1k /1.15 Lockoff 60% F pk Weight A F pk = /1.15 [mm²] [kn] [kn] [kn] [kn] [kn] [kn] [kn] [kn] [kg/m] , , ,328 1,170 1, ,395 1,230 1, ,593 1,404 1, ,674 1,476 1,283 1, ,050 1,859 1,638 1,424 1,115 1,953 1,722 1,497 1,

12 DYWIDAG Removable Threadbar Anchors Threadbar Anchor with Removable Free Length Tension type anchor with removable free length Only bonded bar length remains in the soil Easy and safe anchor removal: The steel tendon can be unscrewed from a special coupler in the transition from the bond length to the unbonded length Removability can be checked before stressing the anchor Slender system high forces despite small boreholes Anchor Head Smooth Sheating Special Coupler for Removal DYWIDAG Prestressing Steel / GEWI Threadbar Grout Body Spacer Anchor Free Length Anchor Bond Length Removal Principle Step 1 1. Destress the anchor Step 2 2. Rotate bar to disconnect the bar from the special coupler Step 3 3. Pull out the bar through the smooth sheating Technical Data Bar Dia. Bar Anchor Specifications according to Bar Anchor Specifications according to pren : DIN EN EN 1537:2001 Crosssectional area Ulitmate Yield load Lockoff Proof load Weight A F pk = /1.15 P 0 = 60% F pk P 0 = 80% F pk [mm] [mm²] [kn] [kn] [kn] [kn] [kn] [kg/m] , , ,257 1,190 1,320 1, , ,735 1,650 1,820 1,435 1,092 1,

13 DYWIDAG Removable Threadbar Anchors Threadbar Anchor with Completely Removable Tendon Compression type anchor with completely removable steel tendon Easy and safe anchor removal: The steel tendon can be unscrewed from the end anchorage Only PE tubes, compression bodies and end anchorage remain in the ground; they do not disturb subsequent construction works (pile driving, excavation, TBM) Patented compression body design ensures load transfer into the grout matrix Removability can be checked before stressing the anchor Anchor Head DYWIDAG Prestressing Steel / GEWI Threadbar Smooth Sheating Compression Bodies Grout Body Spacer End Anchorage Anchor Free Length Anchor Bond Length Compression Body Length Removal Principle Step 1 1. Destress the anchor Step 2 2. Rotate bar to disconnect the bar from the special coupler Step 3 3. Pull out the bar through the smooth sheating Technical Data Bar Dia. Bar Anchor Specifications according to Bar Anchor Specifications according to pren : DIN EN EN 1537:2001 Crosssectional area Ulitmate Yield load Lockoff Proof load Weight A F pk = /1.15 P 0 = 60% F pk P 0 = 80% F pk [mm] [mm²] [kn] [kn] [kn] [kn] [kn] [kg/m] , , ,257 1,190 1,320 1, , ,735 1,650 1,820 1,435 1,092 1, Bar Diameter Compression Body Length Outer Diameter Compression Bodies [mm] [mm] [mm] , , , , ,

14 References DYWIDAG Removable Strand Anchors Kronenbridge Freiburg, Germany General Contractor PST Spezialtiefbau Süd GmbH DSI Unit DYWIDAG-Systems International GmbH, BU Geotechnics, Germany DSI Services Production and Supply DYWIDAG Products 20 Temporary DYWIDAG QuickEx Anchors with 4 Strands (0.6" St1570/1770), 21m long Schlossstrasse, Munich, Germany Owner Private., Germany +++ General Contractor PST Spezialtiefbau Süd GmbH, Germany DSI Unit DYWIDAG-Systems International GmbH, BU Geotechnics, Germany DSI Services Production, Supply and Technical Support DYWIDAG Products 14 temporary DYWIDAG Strand Anchors with Removable Free Length with 7 Strands, Type 0.6" St1570/

15 References DYWIDAG Removable Threadbar Anchors The Future of Education: A new Campus for UAS Duesseldorf, Germany Owner Building and infrastructure organization of North Rhine-Westphalia, Germany +++ General Contractor Hochtief Solutions AG, Germany +++ Contractor Pohl Erdbewegungen GmbH, Germany +++ Subcontractor Heinsberger Grundbau GmbH, Germany +++ Engineering Joint Venture Campus Derendorf, consisting of Nickl & Partner Architekten AG, Ebert-Ingenieure GmbH and Pfefferkorn Ingenieure, Verband Beratende Bauingenieure VBI, all of them Germany DSI Unit DYWIDAG-Systems International GmbH, BU Geotechnics, Germany DSI Services Production, supply DYWIDAG Productss 163 completely removable St950/1050 WR DYWIDAG Ground Anchors; 460m of Type SUSPA Systems Compact Temporary Strand Anchors Industriestrasse Vaihingen, Stuttgart, Germany Contractor G&R Spezialtiefbau GmbH, Germany DSI Unit DYWIDAG-Systems International GmbH, BU Geotechnics, Germany DSI Services Production, supply, engineering services DYWIDAG Products 17 Temporary Bar Anchors with Completely Removable Tendon 15

16 Austria DSI Underground Austria GmbH Alfred-Wagner-Strasse Pasching/Linz Austria Phone info.austria@dsiunderground.at Belgium DYWIDAG-Systems International N.V. Philipssite 5, bus 15 Ubicenter 3001 Leuven Belgium Phone info.be@dywidag-systems.com France DSI France SAS Rue de la Craz Z.I. des Chartinières Dagneux France Phone dsi.france@dywidag-systems.fr Germany DYWIDAG-Systems International GmbH Germanenstrasse Koenigsbrunn Germany Phone geotechnik@dywidag-systems.com Italy DYWIT S.P.A. Viale Europa 72 Strada A 7/ Cusago (Milano) Italy Phone info@dywit.it Netherlands DYWIDAG-Systems International B.V. Veilingweg KM Zaltbommel Netherlands Phone nl@dywidag-systems.com Poland DYWIDAG-Systems International Sp. z o.o. ul. Bojowników o Wolnos c i Demokracje 38/ Chorzów Poland Phone dsi-polska@dywidag-systems.com 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. Portugal DYWIDAG SISTEMAS CONSTRUCTIVOS, SA Rua D. Manuel, n.º 24 A Quinta da Parreirinha Bobadela (Loures) Portugal Phone dywidag@dywidag-sistemas.com Spain DYWIDAG SISTEMAS CONSTRUCTIVOS, S.A. Avd/de la Industria, 4 Pol. Ind. la Cantuena Fuenlabrada (Madrid) Spain Phone dywidag@dywidag-sistemas.com United Kingdom DYWIDAG-Systems International Ltd. Northfield Road Southam, Warwickshire, CV47 0FG Great Britain Phone sales@dywidag.co.uk China DYWIDAG-Systems International Far East Ltd. 9/F, Prosperity Millennia Plaza, Unit King s Road, North Point Hong Kong Phone dsihk@dsife.com.hk India DSI-BRIDGECON Pvt. Ltd. 265, Okhla Industrial Estate, Phase New Delhi India Phone info@dsi-bridgecon.com Korea DYWIDAG-Systems Korea Co. Ltd. 5 th Floor, Spring Morning B/D 8, Mabang-ro, Seocho-gu Seoul Korea Phone dywidagkor@gmail.com Qatar DYWIDAG-Systems Middle East W.L.L. Al Shoumoukh Towers 11 th Floor Street 231 Building no 58 Area no 23, Suhaim Bin Hamed Doha P.O.Box Doha / Qatar Phone info.qatar@dsi-middleeast.com Saudi Arabia DYWIDAG-Systems Int. Saudi Arabia, LLC P.O. Box Riyadh-Olaya Saudi Arabia Phone dsihv@dywidag-systems.com ARGENTINA AUSTRALIA AUSTRIA BELGIUM BOSNIA AND HERZEGOVINA BRAZIL CANADA CHILE CHINA COLOMBIA COSTA RICA CROATIA CZECH REPUBLIC DENMARK EGYPT ESTONIA FINLAND FRANCE GERMANY GREECE GUATEMALA HONDURAS HONG KONG INDIA INDONESIA IRAN ITALY JAPAN KOREA LEBANON LUXEMBOURG MALAYSIA MEXICO NETHERLANDS NIGERIA NORWAY OMAN PANAMA PARAGUAY PERU POLAND PORTUGAL QATAR RUSSIA SAUDI ARABIA SINGAPORE SOUTH AFRICA SPAIN SWEDEN SWITZERLAND TAIWAN THAILAND TURKEY UNITED ARAB EMIRATES UNITED KINGDOM URUGUAY USA VENEZUELA /06.17-web sc