Structures Cut & Covers and Lane Covers in sections A & B of Rapsomati Tunnel s exit N.R. Tripoli - Kalamata Southern Greece

Structures Cut & Covers and Lane Covers in sections A & B of Rapsomati Tunnel s exit N.R. Tripoli - Kalamata Southern Greece Cut & Covers Structures Lane Covers Total cost: approx. 15,4 m. Cost of Lane Cover Α approx. 4,19 m. Cost of Lane Cover Β approx. 11,2 m. Design: 2008 Construction: 2008-2009 General view of lane cover Cut & Covers Lane Covers founded in circular cross section columns and appropriate reinforced concrete piles Length of Lane Cover A: 95m Length of Lane Cover Β: 263m Maximum useful height: 9,40m Weathered mantle of limestones, thin bedded limestones, pelites and shales Simulation analysis model of lane cover Evaluation of the geological geotechnical investigations Elaboration of geotechnical design Structural design of Lane Covers Slope stability analysis for the temporary and permanent cut slope Dimensioning and design of Lane Cover s backfilling Detailed Final Geotechnical & Structural Design Designs carried out by OMIKRON KAPPA CONSULTING S.A. and INGENIEURBURO EDR GmbH, Munich MINISTRY OF E.PP.PW. - GENERAL SECRETARIAT OF PUBLIC WORKS, GENERAL DEPARTMENT OF TRANSPORTATION WORKS Typical cross section of lane cover Panoramic view of cut

Railway Subbase and Trackbed Reinforcement Earthworks at North Portal of Kallidromo Railway Tunnel of the New Double High Speed Railway Line Tithorea - Lianokladi Fthiotida Providence, Komnina Region Subbbase and trackbed reinforcement of the new double track high speed railway line Tithorea-Lianokladi at section 14+300 19+000 ΑΡΙΣΤΕΡΟΣ ΑΞΟΝΑΣ Σ/Γ S_GR_K ΑΞΟΝΑΣ ΔΙΠΛΗΣ Σ/Γ ΔΕΞΙΟΣ ΑΞΟΝΑΣ Σ/Γ Total Cost: approx. 1,2 m. Design: 2009-2010 Construction: 2011 - Determination of the subbase requirements of the new double track high speed railway line Tithorea-Lianokladi at section 14+300 19+000 Typical cross section of subbase reinforcement with geogrids Geomorphology Clayey-marl formations, with scattered intercalations of sandy-marl The presence of the sand layers in combination with the inclination of the layers acts as a water bank, creating confined water masses of high capacity and hydrostatic pressure During slope excavation, intense water flow was monitored from the sand ayers of the champagne effect type and creation of mudflow Investigation of the in-situ geotechnical conditions of the subbase Qualitative classification of the subbase according to UIC719R 2008 Selection of the required subbase reinforcement according to UIC719R 2008 Appropriate reinforcement of the subbase with geogrids and soil replacement in sections of the project where the minimum requirements of the UIC719R 2008 are not met. Construction Joint Venture AKTOR S.A. TERNA S.A. J&P AVAX S.A.

DSR6 σκυρόδεμα C20/25 διαστάσεων 1.40m(πλάτος)x1.20m(ύψος) Πάσσαλοι διάτμησης από οπλισμένο σκυρόδεμα C20/25 διαστάσεων O100/m, L=1m DSR6 13.31 1.40 Í.Ó.ÃÑÁÌ Ì Ç 31 30 3:4 29 Εγκάρσια κανάλια εκροής σύμφωνα με υδραυλική μελέτη 28 27 26 25 ΑΞΟΝΑΣ ΔΙΠΛΗΣ ΣΙΔ. ΓΡΑΜΜΗΣ Κεφαλόδεσμος από οπ λισμένο σκυρόδεμα C20/25 διαστάσεων 1.40m(πλάτος)x1.20m(ύψος) Πάσσαλοι διάτμησης από οπλισμένο σκυρόδεμα C20/25 διαστάσεων O100/m, L=1m ΕΠΙΧΩΜΑ ΜΕ ΟΠΛΙΣΗ ΓΕΩΠΛΕΓΜΑΤΩΝ 24 Εγκάρ σια κανά λια εκροής σύμφωνα με υδραυλική μελέτη 23 Αρμός 2εκ. 22 21 3:4 20 ΕΠΙΧΩΜΑ ΧΩΡΙΣ ΟΠΛΙΣΗ Ã 19 Αρμός 2εκ. 18 ΑΞΟΝΑΣ ΔΙΠΛΗΣ ΣΙΔ. ΓΡΑΜΜΗΣ 17 Αποστραγγιστική τάφρος σύμφωνα με υδραυλική μελέτη 16 15 14 13 Αποστραγγιστική τάφρος σύμφωνα με υδραυλική μελέτη 12 Αρμός 2εκ. ΠΕΡΙΟΧΗ ΕΦΑΡΜΟΓΗΣ ΤΥΠΙΚΗΣ ΔΙΑΤΟΜΗΣ 787 Όριο επιχώματος σταθεροποίησης - αποκατάστασης 11 10 9 3:4 ΙΧΝΟΣ ΟΡΙΟΥ ΑΣΤΟΧΙΑΣ ΕΠΙ ΥΦΙΣΤΑΜΕΝΟΥ ΑΝΑΓΛΥΦΟΥ X.Θ. 15+714 - X.Θ. 15+820 (07/2009) Εγκάρσια κανάλια εκροής σύμφωνα με υδραυλική μελέτη Σχεδιασμ ός μόνιμων πρανών σύμφωνα με εγκεκριμένες γεωτεχνικές μελέτες Αποστραγγιστική τάφρος σύμφωνα με υδραυλική μελέτη 8 6.50 ΟΡΙΟ ΜΟΝΙΜΗΣ ΕΚΣΚΑΦΗΣ Αρμός 2εκ. 6.50 3.32 7 7.00 ΙΧΝΟΣ ΟΡΙΟΥ ΑΣΤΟΧΙΑΣ ΕΠ Ι ΥΦΙΣΤΑΜΕΝΟΥ ΑΝΑΓΛΥΦΟΥ X.Θ. 15+714 - X.Θ. 15+820 (07/2009) Εγκάρσια κανάλια εκ ροής σύμφωνα με υδραυλική μελέτη K-ê 6 5 4 Στέψη αναβαθμού Στέψη αναβαθμού Στέψη αναβαθμού BH1 K-ê BH1 K-ð 3 3:4 2 Στέψη αναβαθμού BH2 Στέψη αναβαθμού 1 ΙΧΝΟΣ ΟΡΙΟΥ ΑΣΤΟΧΙΑΣ ΕΠΙ ΥΦΙΣΤΑΜΕΝΟΥ ΑΝΑΓΛΥΦΟΥ X.Θ. 15+714 - X.Θ. 15+820 (07/2009) K-ð BH2 1.40 ΟΡΙΟ ΑΠΑΛΛΟΤΡΙΩΣΗΣ Πόδας αναβαθμού Πόδας αναβαθμού Πόδας αναβαθμού 1 Πόδας αναβαθμού Πόδας αναβαθμού 5.00 ΛΕΠΤ. "B" 5.00 5.00 5.00 5.00 ΟΡΙΟ ΑΠΑΛΛΟΤΡΙΩΣΗΣ Á B 5.00 Πόδας αναβαθμού Πόδας αναβαθμού Στέψη αναβαθμού Στέψη αναβαθμού Πόδας αναβαθμού ΠΕΡΙΟΧΗ ΕΦΑΡΜΟΓΗΣ ΤΥΠΙΚΗΣ ΔΙΑΤΟΜΗΣ 786 ΕΠΙΧΩΜΑ ΧΩΡΙΣ ΟΠΛΙΣΗ ΛΕΠΤ. "Α" ΕΠΙΧΩΜΑ ΜΕ ΟΠΛΙΣΗ ΓΕΩΠΛΕΓΜΑΤΩΝ Όριο επιχώματος σταθεροποίησης - αποκατάστασης DSR6 2:3 45.24 ΠΕΡΙΟΧΗ ΕΦΑΡΜΟΓΗΣ ΤΥΠΙΚΗΣ ΔΙΑΤΟΜΗΣ 784 45.24 DSR6 Απ οστρα γγιστική τάφρος σύμφωνα με υδραυλική μελέτη DSR6 Αποστραγγιστική τάφρος σύμφωνα με υδραυλική μελέτη 2:3 Σχεδιασμός μόνιμων πρανών σύμφωνα με εγκεκριμένες γεωτεχνικές μελέτες Σχεδιασμός μόνιμων πρανών σύμφ ωνα με εγκεκριμένες γεωτεχνικές μελέτες DSR6 Special Geotechnical Applications Landslide Rehabilitation Earthworks at North Portal of Kallidromo Railway Tunnel Fthiotida Providence, Komnina Region Landslide rehabilitation and slope protection in 3 areas of the project from: Ch. 15+365 to Ch. 15+665 Ch. 15+710 to Ch. 15+835 Ch. 16+651 to Ch. 16+804 Total Cost: approx. 4 m. Design: 2009-2010 Construction: 2011 - Works for the stabilization of the landslide phenomena and the final rehabilitation of the area, taking into account the in-situ conditions and minimizing any destabilization risks. Total affected area ~ 28,000m 2 Clayey-marl formations, with scattered intercalations of sandy-marl The presence of the sand layers in combination with the inclination of the layers acts as a water bank, creating confined water masses of high capacity and hydrostatic pressure During slope excavation, intense water flow was monitored from the sand layers of the champagne effect type and creation of mudflow Τμήμα Πασσάλων Διάτμησης L=61.20m 41.35 22.06 Excavation layout for the partial removal of landslided masses ΤΕΛΟΣ ΜΕΛΕΤΗΣ Χ.Θ. 15+835 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 Τμήμα Πασσάλων Διάτμησης L=61.20m 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 47.50 4.00 20.62 2.50 2.50 Χ.Θ. 15+770.00 27.10 25.64 47.50 4.00 14.96 Final layout and rehabilitation of surface Χ.Θ. 15+725.00 Χ.Θ. ΑΡΧΗ ΜΕΛΕΤΗΣ Χ.Θ. 15+710.00 Χ.Θ. Geotechnical Investigation Program and Geotechnical Interpretation of the landsliding mechanism Drainage works design Design of the best possible slope layout and removal of the landslide materials Stabilization and rehabilitation embankments Landslide Retaining pilewalls Long-term anticorrosion slope protection Execution of back analysis and determination of the potential sliding surfaces Typical cross section of slope failure rehabilitation Design Details Excavation layout for partial removal of landslide material on slopes Geometrical and reinforcement calculation of the necessary pilewall systems for the protection of the excavations and strengthening of the subbase Application of reinforced embankment for stabilization and rehabilitation of the area with slope Application of 3D geocomposite and adequate hydraulic protection of the slopes Construction Joint Venture AKTOR S.A. TERNA S.A. J&P AVAX S.A. Signs of slide failure on terrain

Technical Works Retaining Walls with Strip Foundation Elefsina Korinthos Patra Pyrgos Tsakona Motorway, Concession Central & Southern Greece Retaining walls at embankments toes Retaining structures at open cuts toes Total cost: approx. 8m. Design: 2009-2011 Construction: 2009 - General view of retaining wall Retaining walls Total length: 2.290m Height: 2,0m-9,75m Retaining structures Total length: 820m Height: 2,0m-8.00m Marls, conglomerates, limestones, scree materials, alluvial deposits, gravels, clays, silts, sands Construction of retaining wall Estimation of the input geotechnical design parameters Definition of the geometry of the structures (cross section, height etc.) Elaboration of all the necessary analysis and checks for structures dimensioning Detailed construction drawings Detailed Final Geotechnical & Structural Design Construction Details Reinforced concrete C20/25, C30/37 Surface foundation Additional components at walls crest (safety barriers, sound barriers etc.) Construction of embankment behind the retaining wall s APION KLEOS Construction JV (VINCI CONSTRUCTION GRANDS PROJETS S.A.S. HOCHTIEF Construction AG - J&P-AVAX S.A. - ATHENA S.A. AKTOR S.A. GEK/TERNA S.A.) OLYMPIA JOINT VENTURE (HOCHTIEF Construction AG - AKTOR S.A.) AKTOR S.A. VINCI CONSTRUCTION GRANDS PROJETS S.A.S. Typical cross section of retaining structure

Technical Works Underpasses Elefsina Korinthos Patra Pyrgos Tsakona Motorway, Concession Central & Southern Greece Final Design of nineteen (19) Underpasses Total cost: approx. 6,5m. Design: 2009-2011 Construction: 2009 - General view Three (3) types of underpasses Underpasses founded in two cast in situ reinforced concrete pile series Underpasses with surface (pad) foundation (box type) Underpasses consisting of two wall-type abutments founded in reinforced concrete piles Conglomerates, marls, scree materials, alluvial deposits, gravels, clays, silts, sands Estimation of the geotechnical design parameters and the maximum groundwater level Definition of the geometry of the underpasses (cross section, height etc.) Elaboration of all the necessary analysis and checks for structures dimensioning Detailed construction drawings Detailed Final Geotechnical & Structural Design Construction Details Reinforced concrete C20/25, C30/37 Surface foundation Foundation in piles s OLYMPIA JOINT VENTURE (HOCHTIEF Construction AG AKTOR S.A.) AKTOR S.A. Typical cross section Simulation analysis model Typical cross section

Technical Works Lane Covers Elefsina Korinthos Patras Pyrgos Tsakona Motorway, Concession Central & Southern Greece Final Design of Lane Covers Design: 2009-2011 Construction: 2010-2011 Lane Covers founded in circular cross section columns and founded on cast in place reinforced concrete pile series Typical cross section of Eliki East lane cover Length of Platanos Lane Cover: Length of Temeni Lane Cover: Length of Eliki East Lane Cover: 38m 118m 38m Brecciated limestones, sands, gravels, clays Evaluation of the geological geotechnical investigations Geotechnical design of Lane Covers Structural design of Lane Covers Slope stability analysis for the temporary and permanent cut slopes Dimensioning and design of Lane Covers Detailed construction drawings Final rehabilitation of the Lane Covers Detailed Final Geotechnical & Structural Design Simulation analysis model of the lane cover AKTOR S.A. General view of the lane cover Structure model of Platanos lane cover

Μόνιμες περιφραγματικές απόστραγγιστικές οπές μήκους 10.0m, ονομαστικής διαμέτρου 3'', ενδιαμέσως των πασσάλων, με ανωφερική κλίση 10, με δύο απόστραγγιστικούς σωλήνες από PVC (π.χ. διπλοί σω λή νε ς DURV IN IL ), με υλικό φίλτρου απότελούμενο από θερμοπλαστικές σφαίρες ή χαλαζιακή άμμο. Permane nt dou ble wall screen drain age holes, 1 0.0m long, nominal diameter 3'', between the piles, with 10 minimum upward inclination, consisting of two concentric drainage PVC pipes (e.g. DURVINIL double wall screen), with filtering material which is composed by thermoplastic spheres or quartz sand. Existing ground level from Road Design Λεπτομερής τοπογραφική απότύπωση από επιτόπου εργολάβο AW1 Detailed topo graphical survey by AW1 contractor.39 Επίχωση Backfil απόστραγγιστική τάφρος Drainage trench 5 or 15 Φρεατοπάσσαλοι από οπλισμ ένο σκυρό δεμ α C20/25 διαστάσεων Ø1.0 0/1.50 m, μήκο υς 11.00m B ore d p ile s Ø 1.0 0/1.50 m, len gth 11.00m with C20/25 reinforced concrete Μόνιμα προε ντεταμένα αγκύρια μήκο υς, αριθμού τενόντων και φορτίου προέντασης ως σχετικό πίνακα. Εναλλάξ εφαρμογή κλίσης αγκυρίων 5 και 15 ανά πάσσαλο. Permanent pre-stressed anchors with length, number of stra nds and p restressed load accordin g to the releva nt table. Variation of anchor inclination from 5 to 15 per pile. 8 69 4.20.60 1.35 38 1.00.30.50.25 Φράχτης ανάσχεσης βραχοπτώσεων ο οποίος θα καθοριστεί σε επ όμε νη φάση μελέτης Rockfall protection barrier which should be defined at a next design phase.25.75 Σκυρόδεμα διαμόρ φωσης κλίσεω ν C8/10 10εκ Configuration concrete C8/10 10cm 1.60 Τοίχος πρ οστασίας επίχωσης από οπλισμένο σκυρό δεμα C30/37 Protection wall o f ba ckfilling with C30 /37 reinforced concrete Κεφαλόδεσμος από οπλισμένο σκυρόδεμα C30/37 διαστάσεων 1.35mX1.10m (πλάτος X ύψος) Pile Cap 1.35mX1.10m (width X height) with C30/37 reinforced concrete 64 Σκυρόδεμα εξομάλυνσης C8/10 10εκ Lean concrete C8 /10 10cm Πέτασμα οπλισμένου σκυροδ έματος C30/37 στατικού πάχους 25cm Final lining of reinforced concrete C30/37, 25cm static thickness Εγκοπή επί το υ πετάσματος (Λεπτ."Α") Slot on the pile lining (Detail "A") 1.55 14.98 11.45 hydraulic arrangements Διάτρητος τσιμεντοσωλή νας Φ200 με ελάχιστη κλίση 1% Perforated cement pipe Φ200 with minimum 1% inclination Στραγγιστήριο με γεωύφασμα κα ι χονδρόκοκκο υλικό σύμφωνα με παρ.38 της Τ.Σ.Υ. Drain from big size granular material covered with geotextile according to par. 38 of T.C.C. 1.30 Special Geotechnical Applications Complex Retaining Systems and Structures Elefsina Korinthos Patras Pyrgos - Tsakona Motorway, Concession Central & Southern Greece Final Designs for construction of retaining wall system with single or double pile-walls and application of permanent prestressed anchors for the secure execution of highway works in adverse geotechnical and geometrical areas Total project s cost: approx. 9 m. Design: 2009-2011 Construction: - Total length of complex retaining systems: ~1000m Maximum height of retaining systems: 35 m Pliocene and Plio-pleistocene Marls, Conglomerates, Alternations of Marl-Conglomerates, Alluvial Deposits, Weathered slope materials, Sands, Gravels, Clay-Silts Geotechnical interpretation and design parameter assessment Geotechnical parameters optimization with slope stability back analysis Specific load check of the retaining system from random sliding surfaces Serviceability check of the retaining system Check and dimensioning of prestressed anchors according to EC7 Assessment and determination of the seismic load according to the area s geotechnical profile Final Detailed Design Cross Section of retaining wall at geometrically adverse areas 9.00 8.50 17.50 9.50 7.00 16.50.58 3:2 Cross section of composite retaining system with prestressed anchors 10 SR30L 11.00.50 2.80 1.10 3.50 3.00.50 s OLYMPIA JOINT VENTURE (HOCHTIEF Construction AG - AKTOR S.A.) AKTOR S.A. Cross section of composite triple retaining system with prestressed anchors

Special Geotechnical Applications Retaining Works inside a Landslided Area Pathe Section Maliakos Kleidi Motorway, Concession Central Greece Construction of retaining wall system with single or double pile-walls for the secure execution of highway works inside landslided area Total project s cost: approx. 1,5 m. Design: 2010-2011 Construction: - Construction of retaining wall system with single or double concrete cantilever pilewalls for the secure execution of highway works inside a landslided area Total length of pilewall system: ~300m Maximum height of pilewall system: 10m Total slope height: 30m The bedrock of the landslide area includes ophiolite rocks The overlying soil materials consist of a sequence of slided masses Layout depicting the landslided areas Plan view of the excavations and the retaining system structure Design Details Detailed final design of permanent open cut Geotechnical interpretation and design parameter assessment Special design and dimensioning of the pile system with finite elements software Specific load check of the retaining system from random sliding surfaces Serviceability check of the retaining system Assessment and determination of the landslided area s seismic load MALIAKOS KLEIDI CONSTRUCTION JV (HOCHTIEF - AKTOR J&P AVAX VINCI CGP AEGEK ATHENA) Foot-wall founded on conventional embankment in combination with EPS fill Cross Section with double retaining wall pile series

Special Geotechnical Applications Mechanically Stabilized Earth Walls Pathe Section Maliakos Kleidi Motorway, Concession Central Greece Mechanically Stabilized Earth Walls with height 10-16m constructed by gabions as retaining walls or bridge abutments Total project s cost: approx. 5 m. Design: 2009-2011 Construction: 2011 - Excavation layout of MSEW foundation area Mechanically Stabilized Earth Walls with height 10-16m constructed by gabions as retaining walls or bridge abutments Total MSEW length: ~500m Maximum height: 10-16m MSEW slope: 85 o up to vertical GU 10 ~ 14: Recent deposits, Phyllites GU 16 ~ 19: Recent deposits, ophiolithic sequence, limestones Design Details Final Detailed Geotechnical Design Geotechnical interpretation and design parameter assessment Stability evaluation of MSEW with specialized software Internal and External stability checks Appropriate Geogrid application according to fill material characteristics Gabion modulation in geometrically complex areas Plan view and details of grid and gabion connection MALIAKOS KLEIDI CONSTRUCTION J/V (HOCHTIEF AKTOR J&P AVAX VINCI CGP AEGEK ATHENA) Longitudinal section of MSEW bridge abutment

Cut & Cover Structure East Portal Cut & Cover of Agios Ilias Tunnel Paraionian Road West Greece Cut & Cover Total cost: approx. 3,5 m. Design: 2003 Construction: 2003-2005 Cut & Cover Total Length: 120m Cross section of horseshoe type Concreting works of the Cut & Cover crown Marls, clays, gravels Landslide materials Groundwater Detailed Final Geotechnical & Structural Design Design jointly carried out by OMIKRON KAPPA CONSULTING & INGENIEURBURO EDR GmbH, Munich Construction Details Construction of two rows of piles connected with cap beams Connection of the Cut & Cover crown with the cap beams Formation of the portal walls in curved surface with the use of metal formwork Construction of portal walls with the use of metal formwork of 8m length Reinforcement of the Cut & Cover base and construction of lateral walls EFKLIDIS S.A. Cut & Cover crest

Cut & Cover Landscape Rehabilitation of Tunnels portals Cut & Cover structures for the landscape rehabilitation of tunnels portals Total cost: approx. 1-4 m. Design: 2000-2005 Construction: 2000-2005 Cut & Cover Total Length: 5-120m Cross section of horseshoe type Cut & Cover of AS1 Tunnel entrance portal (Highway PATHE, Kakia Skala section) Schists, limestones Weak overthrust materials, sandstones Siltstones Groundwater Detailed Final Geotechnical & Structural Design Designs jointly carried out by OMIKRON KAPPA CONSULTING & INGENIEURBURO EDR GmbH, Munich s EGNATIA ODOS S.A. AKTOR S.A. AEGEK S.A. EFKLIDIS S.A. J&P-AVAX(HELLAS) S.A. Cut & Cover of S1 Tunnel entrance portal (Egnatia Odos, section 5.2-5.3) Cut & Cover of Agios Nikolaos entrance portals (Egnatia Odos, section 3.3)

Cut & Cover Nafpaktos Bypass Central Greece Cut & Cover Total cost: approx. 5 m. Design: 2004 Construction: Under construction Cut & Cover Length: 140m Cross Section: Rectangular Width: 13,30m Vertical walls with height 8,80m-9,50m Crown characteristics: Height: 1m Thickness: 40cm Retaining and parapet walls in the beginning and the end of the Cut & Cover for the connection of the structure with the open road works Typical Cut & Cover cross section Very weak tectonically deformed siltstones, Brecciated limestones Groundwater Detailed Final Geotechnical & Structural Design Structural design jointly carried out by OMIKRON KAPPA CONSULTING & INGENIEURBURO EDR GmbH, Munich Front view of the Cut & Cover EFKLIDIS S.A.

Rockfall Protection Kakia Skala Section PATHE Highway Central Greece Highway protection from rockfalls Total cost: approx. 2 m. Design: 2003 Construction: 2003 Total length of barriers: approx. 2000m Limestones and dolomitic limestones Very steep morphology Construction Method Special barriers installed to prevent rockfalls and to absorb kinetic energy Geotechnical analysis and design of rockfall barriers AKTOR S.A.

Rockfall Protection Wall PATHE Highway, Kakia Skala Section Central Greece Rockfall protection wall in a highway Total cost: approx. 0,5m. Design: 2003 Construction: 2003-2004 Rockfall protection wall Length: 1.455m Height: 1.80m Limestones, scree in a seismically active area Detailed Final Geotechnical & Structural Design Construction Details Rockfall concrete wall with surface foundation 3 typical cross sections AKTOR S.A. Typical cross sections

Retaining Wall Retaining Wall T16 PATHE Highway, Kakia Skala Section Central Greece Retaining wall for the protection of the highway Total cost: approx. 2,1m. Design: 2003 Construction: 2003-2004 Retaining wall Length: 375m Height: 2,0m-9,75m Construction of piles for the foundation of the retaining wall Limestones, scree in a seismically active area Detailed Final Geotechnical & Structural Design Construction Details 32 concrete sections Surface foundation in 16 sections Pile foundation in 6 sections AKTOR S.A. Typical cross sections

Special Geotechnical Applications Jet Grouting Diaphragm Wall Egnatia Highway, Section 2.4 3.1 Northern Greece Jet Grouting diaphragm wall, for the reduction of water inflows in order to construct the foundations of M2 to M6 piers of T10 bridge at Metsovitikos River Total cost: approx. 6 m. Design: 2007 Construction: 2007-2008 Jet Grouting diaphragmatic wall with secant ground piles Central diaphragm wall, with 3 rows ground piles 4 additional diaphragm walls at the foundation areas of the piers Diameter: Ø 80, Length 10m-20m Total Walls Length: 365m Riverbed deposits (sands, breccia argillaceous materials) Conglomerates with high permeability High river flood discharge High groundwater table Detailed Final Geotechnical Design Construction Details Dam construction for the arrangement of the riverbed Rip - rap construction for the protection of the main diaphragm wall AKTOR S.A. Jet grouting Construction Stages

Culvert Culvert OA3 PATHE Highway, Kakia Skala Section Central Greece Highway hydraulic work Total cost: approx. 0,4 m. Design: 2003 Construction: 2003-2004 Rectangular Culvert Upstream section: Length: 221m (closed cross section) 11m (open cross section) Height: 2,5m Width: 2,0m Downstream section: Length: 30m (closed cross section) 45m (open cross section) Height: 2,5m-7,6m Width: 2,0m Plan view of the culvert Limestones Seismically active area Detailed Final Geotechnical & Structural Design AKTOR S.A. Longitudinal section of the culvert

Culvert Culvert OA9 PATHE Highway, Kakia Skala Section Central Greece Highway hydraulic work Total cost: approx. 0,21 m. Design: 2003 Construction: 2003-2004 Rectangular Culvert Length: 79m (closed cross section) 37m (open cross section) Height: 2,0m Width: 2,5m Limestones Seismically active area Detailed Final Geotechnical & Structural Design AKTOR S.A. Culvert typical cross sections of open and closed type

Road Works Earth and Structural Works Romania Central Europe Technical & earth works in a 60km road. Total cost: approx. 4 m. Design: 2005 Construction: 2005 today Retaining walls Pilewalls Reinforced embankments Stream bed modulations with gabions Slope support Typical cross section of a retaining wall Audit of existing designs Elaboration of construction method statements s AKTOR S.A. MOCHLOS S.A. Typical cross section of an embankment

Retaining Wall Distribution Center of Procter & Gamble Aspropyrgos, Attiki Central Greece Retaining wall for the construction of industrial building Total cost: approx. 0,2 m. Design: 2006 Construction: 2006 Retaining wall at the east and south side of the building Modulation of excavation foot at a distance of 0,75m from the wall and at a parallel direction Modulation of excavation with gradient 7:1 (height: width) and max. height 13m Backfilling between the slope and the retaining wall Backfilling works of slopes modulation in the east side of the building Thick-bedded to unsorted limestones On site geological imprinting Modulation of rock mass urges and backfilling of the retaining wall Assessment and dimensioning of retaining slope measures ΑΚΤΟR S.A. General view of the area of the building construction

Underground Parking Building IONIA S.A. Athens 3-floor underground parking facilities in a 4-floor building Total cost: approx. 1,5 m. Design: 2005 Construction: 2005 Width: 48m Length: 53m Depth: 13m Construction Method Pile anchored wall Building model Man made deposits, soil materials Detailed Final Design Construction drawings of the retaining structures Construction Details Retaining structures with steel piles Ø600 consisted of pair of steel beams and reinforced concrete piles Ø800 Placement of 2 to 3 rows of prestressed anchors with length 10m to 21m with 1 or 2 tendons Ø0,6, connected with horizontal beams UPN 200 AKTOR S.A. NE construction view