(Part 9-2e, PP 2007, animation+p/r: 2008.03.14 rev. 2012.12.31 compr. Part 9-2e Rock injections in Kárahnjúkar-Iceland. Contact grouting for plugs XII-2012 (Part 9-2e, PP 2007, animation+p/r: 2008.03.14 rev. 2012.12.31 compr. 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. ready

Family and company history in civil 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. Tomasz Najder joined in the period of 1974-1976 Skånska Cementgjuteriet (today Skanska AB) as a member of Supervising Team on the project “Second Dry Dock in Gdynia Shipyard”. 1983-2002 Tomasz Najder gained his experiences in Stabilator AB (daughter company in Skanska Group) as site manager, project manager and internal consultant (”trouble-shooter”), 1990-1995 as Production Manager (Stabilator AB- International Division in Poland), 1995-2001 in Polish-Swedish company Stabilator Sp. z o.o. (Skanska Group) as Vice President and Executive Manager. Anna Elżbieta Najder (wife) owned 1991-2002 Polish company Polibeton Sp. o.o. and now Swedish Najder engineering® since 1997 (until 2005 operating as Polimark International) – operating globally. Anna Monika Najder (daughter) together with Tomasz Najder (as the President of the Board and Executive Manager) owned 2002-2009 Polish Najder engineering® operating in Poland. Family Najder is working within mining, tunneling and civil engineering since six generations. ready

Foundation engineering and soil investigations. Field of activity Foundation engineering and soil investigations. 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. ready 3 3

Daughter Anna Monika Najder 1978 - Senior Tomasz Najder 1951- Son Jan Najder 1981 - Daughter Anna Monika Najder 1978 - Mama Anna Najder ready

Kárahnjúkar Hydropower Project 2006-2008 Diversion Tunnels at dam 2.4 km (Kar 14) Headrace Tunnel 53.0 km (Kar 14) Grouting galleries at dam  0.5 km    (Kar 14) Cable tunnel  1.0 km Hraun Diversion 2.0 km Grjótá Diversion 1.75 km Adit 1 1.4 km (Kar 14) Adit 2 2.7 km (Kar 14) Adit 3 2.8 km (Kar 14) Surge Tunnel 1.7 km (Kar 14) Drainage Tunnel 0.7 km (Kar 14) Penstocks 0.82 km (2x) Access to Powerhouse 1.0 km Tailrace Tunnel 1.3 km Total Tunnel Length: 73.0 km (D&B=10 km, TBM=63 km) press press ready Kárahnjúkar Hydropower Project 2006-2008 5 5

Main Dam area – view from the canyon ready

Main Dam ready

HRT Kárahnjúkar (“Windy Mountain”) ready Headrace Tunnel 8

Jökulsá Diversion Tunnel Main Dam Jökulsá Diversion Tunnel HRT Powerhouse Powerhouse area ready 9

TBM D&B press ready

The TBM is composed of the following main components: - Cutter head - Main beam - Gripper system - Thrust Cylinders - Rear Lift Legs - Tow System Accessories: - Roof Bolting and Probe Drilling Rigs - Ring Beam Erector - Core drill - Shotcrete system - Back-up - No. 9 decks - Rolling stock - Locomotives and service wagons ready

Main Dam under construction – view from Kárahnjúkar (“Windy Mountain”) ready

Kárahnjúkar Dam – cross section ready

Kárahnjúkar Dam – diversion tunnels, Power Intake and spillway HRT Kárahnjúkar Dam – diversion tunnels, Power Intake and spillway ready

Plug 5 (Main Dam) ready

8m long pre plug and 16,6m long Plug 5 in Diversion Tunnel T2 ready

8m long pre Plug 5 in Diversion Tunnel T2 ready

Cooling system against cracking at Plug 5 ready

Cooling system against cracking: temperature increase after pouring of Plug 5 ready

Curtain grouting with cement grout at Plug 5 ready

Consolidation grouting with cement grout at Plug 5 ready

Plug 5 – grouting pattern for consolidation- and contact grouting press ready

ready and cracks in concrete

Contact grouting with cement grout above the pre plug ready

Plug 5 – drilling for contact grouting within the plug ready

Contact grouting with cement grout above the plug ready

Contact grouting. Note water coming through the early-age thermal crack. None-succeeded cement grouting for crack repair ready

Concrete repairs (the early-age thermal crack): holes with packers ready for grouting with polyurethane resin (PUR) ready

Concrete repairs (the early-age thermal crack): PUR grouting at the crown of the plug ready

Concrete repairs (the early-age thermal crack): PUR grouting completed ready

Headrace Tunnel excavation – longitudinal section ready

Headrace Tunnel profile

Curtain, consolidation and contact grouting Grouting for plugs (Headrace Tunnel) Curtain, consolidation and contact grouting ready

Main junction Plugs press press press ready

Rock fractured after blasting ready

Typical plug construction (Adit 2 Plug 2.2 with door) ready

Clay filled fault across Plug 2.2 ready

Drilling for curtain grouting (stage 1a) (Adit 2 Plug 2.2 with door) ready

Drilling for consolidation grouting (stage 2a) (Adit 2 Plug 2.2 with door) ready

Packers for curtain grouting with cement grout (stage 1b) and for consolidation grouting (in front of the plug – stage 2b) (Adit 2 Plug 2.2 with door) ready

Packers for curtain grouting with cement grout (stage 1b) (Adit 2 Plug 2.2 with door) ready

Mechanical packers for cement grouting (Adit 2 Plug 2.2 with door) ready

The crack in the concrete caused by too high grouting pressure and leaking cement grout !!! (Adit 2 Plug 2.2 with door) ready

Contact grouting (stage 3b) with 2-comp. PUR (Adit 2 Plug 2.2 with door) ready

Contact grouting (stage 3b) with 2-comp. PUR (Adit 2 Plug 2.2 with door) ready

Contact grouting (stage 3b) with 2-comp. PUR (Adit 2 Plug 2.2 with door) ready

Result of contact grouting (stage 3b) with 2-comp. PUR. The crack in the concrete caused by too high grouting pressure (Adit 2 Plug 2.2 with door) ready

Crack filled (repaired) with 2-comp. PUR (Adit 2 Plug 2.2 with door) ready

Door to Headrace Tunnel completed (Adit 2 Plug 2.2) ready

Typical plug construction (Plug 4 with door) ready

Grouting pattern (Plug 4 with door) ready

Drilling for curtain grouting (stage 1a) (Plug 4 with door) ready

Steel grouting pipes with valves for contact grouting (Plug 4 with door) ready

Steel grouting pipes for valves Mixed system for contact grouting Mechanical packers Steel grouting pipes for valves Mixed system for contact grouting (Plug 4 with door) ready

Mechanical packers for contact grouting (Plug 4 with door) ready

Drilling pattern for contact grouting with PUR (Adit 3 Plug without door) ready

Scaling of rock above the planned concrete plug (Adit 1 Plug with door) ready

Mechanical packer for curtain cement grouting (stage 1b) (Adit 1 Plug with door) ready

0,20-1,0 m Contact grouting with cement grout through steel pipes placed in the formwork before pouring the concrete (Adit 1 Plug with door) press ready

Contact grouting with cement grout through steel pipes (Adit 1 Plug with door) ready

Contact grouting with cement grout through steel pipes (Adit 1 Plug with door) ready

Contact grouting with cement grout return circuit to the packer Contact grouting with cement grout – equipment for keeping certain refusal pressure (Adit 1 Plug with door) press ready

Leaking early-age thermal cracks (Adit 1 Plug with door) ready

Plug 1 after completion of cement grouting press ready

Leakages after completion of contact grouting using cement grout ready Leakages after completion of contact grouting using cement grout (Plug 1 with door)

Water ingress through new probe drill hole (Adit 1 Plug with door) ready

Consolidation and contact grouting with 2-comp. PUR. Note water leakages through the cracks in concrete (Adit 1 Plug 1 with door) ready

Consolidation and contact grouting with 2-comp. PUR. Note water leakages through the cracks in concrete (Adit 1 Plug 1 with door) ready

Leaking interface between rock and the concrete, cracks and joints before and after PUR contact grouting (Adit 1 Plug with door) press ready

Leaking interface between rock and the concrete before and after PUR grouting (Adit 1 Plug with door) ready

Leakage at the door ready

Outlet of grouting hoses for resin post grouting ready

Drainage Tunnel Plug ready

Drainage Tunnel Plug (to the left) – note grouting pattern for curtain grouting ready

Drainage Tunnel Plug – note grouting pattern for consolidation grouting ready

Drainage Tunnel Plug – consolidation grouting drill pattern and contact grouting pipes ready

Mini drill rig for rotary-percussive drilling ready

Cement grouting with Bimbar packer ready

Grouting pipes with return valves for contact grouting with cement grout ready

Grouting pipes with return valves with cement grout – details for contact grouting with cement grout – details ready

Steel pipes for for contact grouting with cement grout ready

Drainage Tunnel Plug – pouring of concrete ready

Bad poured concrete plug ready

Main Dam under construction by Tom Olliver ready

Thank You for Your attention! THE END Thank You for Your attention! ready

Welcome to www.najder.se ready