Part 10-1b Micropiles and self-drilling rods in soil and rock engineering V-2009 (rev. XI-2012) (Part 10-1b, 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 Example 1: Example 1: underpinning of City Theatre in Gdańsk (Danzig) – Poland ready

ready First location of City Theatre in Danzig – now Gdańsk (Poland)

6 ready City Theatre in Danzig – few graphics from the past...

ready City Theatre in Danzig (now since 1945 Gdańsk in Poland)

8 ready Death of hanseatic Danzig in the end of the second World War City ( ) – damages around City Theatre

9 ready Damages close to City Theatre in March 1945

Uncontrolled fill (bricks from ruins + sand) press ready Short “CV” of City Theatre in Danzig

ready City Theatre in Gdańsk (Poland) – reconstruction after Second World War

ready Damages

13 Geological conditions ready Uncontrolled fill (bricks + sand) Uncontrolled fill (organic) All-in aggregate Gravel + cobbles All-in aggregate + cobbles Silty sand + gravel Loose Medium dense and dense press 1945

14 Danzig (Gdañsk) ≈ year 1500 ready Localization of the future theatre Medieval city moat Genesis of geological conditions

15 Bjurström Underpinning solution – modified Bjurström micropiles ready press

16 Underpinning solution for walls – scope of works ready 1. Micropiles 3. Existing concrete flooring 10. Existing wall 15. Sand fill 9. Transverse steel beam 8. Concrete capping beam Load transmission to new micropiles - transversal steel beams

1935 Entrance to the theatre according to the drawings from the latest reubilding before the Second World War press ready 17 press

1991 press ready 18 Piling plan Supporting of flooring - details Option – demolishing of existing floor Option – core drilling through the existing floor

19 Bjurström Modified by TNa Bjurström micropile (friction type to the left) and conventional (end bearing to the right) ready

Bjurström Test loading of modified Bjurström micropiles press ready 20 Test load [T] Settlement of pile top [mm] Ultimate load [T] Time of pile driving [minute] Micropile length [m] press + 1m press 12m Ultimate load ≈ 9 T

21 Bjurström Underpinning solution – modified Bjurström micropiles ready

22 Excavation at entrance to the theatre and in the foyer press ready Entrance to the theatre and foyer Geotechnical profile Uncontrolled fill (bricks + sand) Uncontrolled fill (organic)

23 Underpinning at entrance to the theatre and in the foyer ready press

24 Final restoration of foyer ready

25 Repairs in technical compartments (never performed) press Uncontrolled fill (bricks + sand) Uncontrolled fill (organic) Coarse sand + gravel Gravel Medium sand ready Geotechnical profile

26 Repairs of ventilation boxes (never performed) ready Piling plan Underpinning of ventilation boxes

Thank You for Your attention! ready 27 THE END

ready Welcome to 28

29 These works had nothing to do with… ready