Part 10-2b Micropiles and self drilling rods in soil and rock engineering V-2009 (rev. XI-2012) (Part 10-2b, 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 1951-

5 Example 4: underpinning of Victoria Schule in Gdańsk (Poland) ready Location of the project

6 Gdañsk ≈ year 1500 ready Location of Victoria Schule on old maps

7 Danzig (Gdańsk) 1809 Location of Victoria Schule on old maps – cont. ready

8 Danzig (Gdańsk) 1912 ready Location of Victoria Schule on old maps – cont.

9 Victoria Schule (build )Hitler in Danzig 1939 Victoria Schule as temporary German GESTAPO arrest house for Polish postmen 1939 Soviet Army Danzig after “rendez-vous” with Soviet Army in 1945 press ready

10 Victoria Schule (build ) Soviet Army Victoria Schule as the building of Biological Department of Gdańsk University (1990), one of few buildings resqued during total fire iniciated by Soviet Army in 1945 (probably needed by Russian administration for the next arrest house) ready

11 ready Victoria Schule today

12 ready Victoria Schule today surrounded by few buildings resqued after the Second Wourd War

13 ΔvΔv Damaged part of the bulding ready

14 ??? press Damaged part of the bulding – walls in the cellars the cellars filled with brick rubbles Damaged part of the bulding – investigations: 1.Drill holes with soil sampling (4 holes). 2.Removal of the flooring (slab). 3.Control pits. 1 press 2 3 ready

15 Damaged part of the bulding – cracks ready

16 ?? crack (fissure) ?? foundation – crushed bricks in cement mortar basement level ceiling uncontrolled fill (bricks + sandy loam with humus) Damaged part of the bulding – foundations and wall construction in the cellars ready

17 Damaged part of the bulding – control pits for investigations of foundations and wall construction in the cellars basement level ceiling uncontrolled fill (bricks + sandy loam with humus) ?? crack (fissure) ??crack (fissure) brick wall foundation – crushed bricks in cement mortar brick wall press ready

18 Damaged part of the bulding – soil invesigations ??? press ??? ready basement level foundation level uncontrolled fill (bricks + sandy loam with humus) uncontrolled fill sandy loam with humus fine sand ground water level

19 loose soil ??? loose soil ??? ready Damaged part of the bulding – soil invesigations

20 Damaged part of the bulding – proposals for underpinning (concepts for further disccusions) press ready

21 Damaged part of the bulding – final design for underpinning press ready Load transmission to new TITAN micropiles: – longitudinal and transversal steel beams

22 (Micro)piling plan ready

TITAN micropiles transversal steel beams main crack longitudinal steel beam 23 Chosen underpinning system ready

24 ready press

transversal steel beams TITAN micropiles longitudinal steel beam 25 Performance of underpinning works ready

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

27 Working procedure: stage 2 – drilling of Titan micropiles outside the building ready

28 Working procedure: stage 2 – drilling of Titan micropiles inside the building ready press

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

30 Load transfer ready

31 Working procedure: stage 4 – final works press ready

32 Test loading of TITAN micropiles ready

Prestressing of TITAN micropiles to avoid further settlements longitudinal steel beam transversal steel beam In the masonry transversal steel beams on TITAN micropile 33 hydraulic jack press ready

Thank You for Your attention! ready 34 THE END

ready Welcome to 35

36 These works had nothing to do with… ready