Part 10-2a Micropiles and self drilling rods in soil and rock engineering V-2009 (rev. II-2013) (Part 10-2a, PP 2007, animation+p/r : compr.) ready 1 Copyright notice Unauthorised copying of this presentation as whole or in parts in any form or by any means, electronic, photocopying, recording or otherwise, without prior written permision is prohibited.

NAJDER engineering ®NAJDER engineering ® is a consulting company as well as a specialist contractor within civil and foundation engineering. We are preparing technical concepts, design projects, analyses and performing jobs as a subcontractor. Skånska Cementgjuteriet Skanska ABTomasz Najder joined in the period of Skånska Cementgjuteriet (today Skanska AB) as a member of Supervising Team on the project “Second Dry Dock in Gdynia Shipyard”. Stabilator AB Skanska Group Stabilator Sp. z o.o. Skanska Group Tomasz Najder gained his experiences in Stabilator AB (daughter company in Skanska Group) as site manager, project manager and internal consultant (”trouble-shooter”), as Production Manager (Stabilator AB- International Division in Poland), in Polish-Swedish company Stabilator Sp. z o.o. (Skanska Group) as Vice President and Executive Manager. Polibeton Sp. o.o. Najder engineering ® Polimark InternationalAnna Elżbieta Najder (wife) owned Polish company Polibeton Sp. o.o. and now Swedish Najder engineering ® since 1997 (until 2005 operating as Polimark International) – operating globally. Najder engineering ®Anna Monika Najder (daughter) together with Tomasz Najder (as the President of the Board and Executive Manager) owned Polish Najder engineering ® operating in Poland. since six generations.Family Najder is working within mining, tunneling and civil engineering since six generations. Family and company history in civil engineering 2 ready

3 3 Foundation engineering and soil investigations. Reinforcement of existing foundations (underpinning) of industrial buildings, housing estates and ancient monuments (piling, anchors, injections).Reinforcement of existing foundations (underpinning) of industrial buildings, housing estates and ancient monuments (piling, anchors, injections). Tunneling, rock stability and soil improvement (deep mixing method, high/low-pressure injection, lime-cement columns). Stabilization of slopes and embankments (geogrids, soil reinforcement, drainage, geotextiles). Sealing of existing embankments, dams, dikes and waste deposits. Flood defense. Coast protection. Biological engineering, gabion constructions. Leakage and moisture counteraction (insulations, drainages, sealing injections, dilatation repair) in concrete and brickworks structures. Field of activity ready

4 Daughter Anna Monika Najder Mama Anna Najder ready Son Jan Najder Senior Tomasz Najder Son Jan Najder 2013

5 ready Example 2: Example 2: underpinning of cathedral in Koszalin (Poland)

6 ready Location of the project

7 Soviet Army Köslin (today Koszalin) before “rendez-vous” with Soviet Army in 1945 ready

8 Soviet Army Köslin before “rendez-vous” with Soviet Army in 1945 ready

9 Köslin (today Koszalin) in 1945

cathedral excavation for catristy 10 ready TITAN Underpinning system with TITAN micropiles

11 Excavation for catristy ready

12 Underpinning system of the cathedral before excavation for new underground catristy – plan the cathedral ready new underground catristy

ready 13 TITAN TITAN – micropiles, anchors and soil nails. Rotary or rotary - ”light percussive” drilling methods (”slow and low pressure jet-grouting”) Example of self-drilling rods

14 TITAN TITAN self-drilling rods with sacrificial drill bits ready

drill bit drill rod = pile shaft cuttings cement grout soil ready 15 TITAN TITAN micropile final shape of grouted pile body

anchoring plate pile shaft D = 1,54 d drill ready 16 TITAN TITAN micropile performed by Najder engineering (2004)

17 press ready

micropile steel bar concrete beam stones(grouted) load streetcellar micropile excavation concrete beam Load transmission to new micropiles – longitudinal concrete beams 18 ready prestressing forces press

19 Underpinning system of the cathedral before excavation for new underground catristy – cross-section ready press

20 Shoring system – “Berlin wall” (details) ready

21 Lowest part of the brick wall and existing foundation of the cathedral after local excavation – before underpinning ready

22 Drilling of Titan micropiles outside the cathedral ready

23 Lowest part of the brick wall and existing foundation of the cathedral after local excavation – under underpinning works ready top plate on Titan micropiles the plastic casing for prestressed bar

24 Underpinning system of the cathedral foundation longitudinal concrete beam prestressed bar inside the plastic casing ready grouting hose for corrosion protection of the prestressed bar

25 Titan micropile – details top plate on Titan micropile ready

longitudinal beam prestressed bar inside the plastic casing 26 Underpinning system of the cathedral foundation – cont. ready

longitudinal concrete beam prestressed bar 27 ready Underpinning system of the cathedral foundation – prestressing of GWS bars press

28 Underpinning system of the cathedral foundation (interior of the church) Titan micropile top plate on Titan micropile ready prestressed bar inside the plastic casing top plate on Titan micropile press grouting hose for corrosion protection of the prestressed bar

29 Underpinning system of the cathedral before excavation for new underground catristy – plan the cathedral ready new underground catristy

30 Secant-pile-wall by Titan micropiles ready

31 Excavation for the catristy (shoring system of modified “Berlin wall”) ready

32 Final construction works at the catristy ready

33 “Catacombs” almost ready ready

34 The same place in 2011 (11 years later) ready

35 ready Location of the project Example 3: underpinning of Racibórz Castle (Poland)

36 Location of the castle ready press

37 Castle in Rattibor (today Racibórz in Poland) ready

38 Part of the castle with largest settlements ready

39 Soviet Army Castle before “rendez-vous” with Soviet Army in 1945 ready

40 Soviet Army The castle after “rendez-vous” with Soviet Army in 1945 ready

41 Part of the castle with largest settlements ready

42 press ready Excavations, core drilling and drilling of Titan micropiles Mounting of transversal steel supporting beams Core drilling and inserting GWS prestressing bars Mounting of longitudinal steel supporting beams, GWS bars prestressing press Load transmission to new TITAN micropiles: – longitudinal and transversal steel beams

43 Working procedure: stage 1 – excavations and core drilling ready

44 Excavations and core drilling press ready

45 Working procedure: stage 2 – drilling of Titan micropiles ready

46 Drilling of Titan micropiles foam cement grout ready

47 Working procedure: stage 3 – mounting of steel supporting beams ready

Load transmission to new TITAN micropiles: – longitudinal and transversal steel beams transversal steel beams longitudinal steel beam micropile 48 before after ready

49 Part of the castle with largest settlements after partial renovation (1995) ready

50 Part of the castle with largest settlements after 17 years (2012) ready

Thank You for Your attention! ready 51 THE END

ready Welcome to 52

53 These works had nothing to do with… ready