Odotechniki ltd underground works

ODOTECHNIKI LTD
CONSULTING ENGINEERS www.odotechniki.gr

UNDERGROUND WORKS

DESIGN MODELLING ANALYSIS CONSTRUCTION
FOLLOW UP

Address: 59, 3 rd September Str. GR 10433, Athens, Greece
e-mails: info@odotechniki.gr , odotechniki@odotechniki.gr
Tel. +30 210 8228052, +30 210 8222127, Fax. +30 210 8233003

ODOTECHNIKI LTD

Geotechnical & Structural experts

Design, Consulting, Construction Follow Up and Subcontracting Services on:
• State-of-the-art modelling and analysis;
• Value Engineering solutions;
• Design reviews and independent checks;
• Design of tunnels and underground works;
• Design of bridges and steel structures;
• Design of buildings;
• Design of retaining structures;
• Design of foundations, embankments, reinforced soil structures, cuts, deep excavations;
• Analysis and stabilization design of landslides and failures;
• Analysis of rock fall and rock fall barriers design;
• Programming and evaluation of geotechnical investigations and monitoring;
• Geological & geotechnical interpretation reports;
• Risk analysis in geotechnical and structural projects;
• CAD services, providing drawings preparation, reinforcement tables and detailing .

e-mails: info@odotechniki.gr , odotechniki@odotechniki.gr
Tel. +30 210 8228052, +30 210 8222127, Fax. +30 210 8233003

UNDERGROUND WORKS

DESIGN OF
MAJOR PROJECTS

STATE OF THE ART DESIGN,
MODELLING, ANALYSIS

CONSTRUCTION FOLLOW-
UP AND CONSULTING

ODOTECHNIKI LTD – CONSULTING ENGINEERS

PARTICIPATION IN MAJOR UNDERGROUND WORKS IN GREECE

DESIGN OF MAJOR PROJECTS



• ATTIKO METRO (Athens metro), Geotechnical Consulting for lines 2 & 3, (constructed).
• ATTIKI ODOS (Athens ring road), geotechnical-structural design of bridges, retaining structures, cut
& covers, tunnels, foundations, buildings, urban development projects, (constructed).
• EGNATIA ODOS, 700km major highway in northern Greece, geotechnical-structural design of
tunnels, bridges, cut & covers, tunnels, special retaining structures, foundations, high embankments,
cuts, landslide rehabilitation, (constructed).
• ANCIENT OLYMPIA RING ROAD , geotechnical-structural design, bridges, cut & covers, tunnels,
special retaining structures, foundations, high embankments, (constructed).
• KORINTHOS-TRIPOLI-KALAMATA Highway, geotechnical-structural design of bridges, cut &
covers, tunnels, special retaining structures, foundations, high embankments, cuts, landslide
rehabilitation, (under construction).
• High speed RAILWAY KORINTHOS-PATRAS, geotechnical-structural design of bridges, cut &
covers, tunnels, special retaining structures, foundations, (under construction).
• ATHENS-THESSALONIKI Highway (STYLIDA ring road), geotechnical-structural design of
bridges, tunnels, special retaining structures, (under construction).
• North Highway of Crete island, geotechnical-structural design of bridges, cut & covers, tunnels,
special retaining structures, foundations, (design in progress).
• THESSALONIKI external peripheral highway, geotechnical-structural design of tunnels, cut &
covers, special retaining structures, (design in progress).

• Construction follow up consulting for EGNATIA TUNNELS: Veria - Polymilos section, (constructed).
• Construction follow up consulting fro ANCIENT OLYMPIA RING ROAD, (constructed).
• Construction follow up consulting for TRIPOLI-KALAMATA Highway, (constructed).



ATTIKO METRO – ATHENS, GREECE – GEOTECHNICAL CONSULTING SERVICES



ATTIKI ODOS – ATHENS, GREECE



EGNATIA ODOS – NORTHERN GREECE



ANCIENT OLYMPIA RING ROAD – PELOPONNESE, GREECE



KORINTHOS-TRIPOLI-KALAMATA HIGHWAY – PELOPONNESE, GREECE



KORINTHOS-PATRAS HIGH SPEED RAILWAY – PELOPONNESE, GREECE



STYLIDA RING ROAD – CENTRAL GREECE


DESIGN, MODELLING, ANALYSIS AND CONSULTING FOR UNDERGROUND WORKS

STATE OF THE ART DESIGN, MODELLING, ANALYSIS



TUNNEL DESIGN

3.74 % 4.62 %
3.74 % 4.62 %

×È:6+900.20
310.82



2D MODELLING AND ANALYSIS OF TUNNEL EXCAVATION

Angle 60 o

Simulation of the discontinuities
Back analysis of twin tunnel excavation in a stratified rock mass

Simulation of slope tunnels (SRF The influence of competent rock mass layer
procedure)


3D MODELLING AND ANALYSIS OF TUNNEL EXCAVATION WITH ANCHORS



3D MODELLING AND INVESTIGATION OF TWIN TUNNEL EXCAVATION

vertical displacements plastic strain

vertical displacements plastic strain



3D ANALYSIS AND INVESTIGATION OF TUNNEL FACE TREATMENT IN SHALLOW TUNNELS

0.000

-0.005

Evaluation of different tunnel face treatment
schemes based on the resulting surface -0.010
uz (m)

settlements for a shallow urban tunnel
Unsupported Face
-0.015
Forepoles Φ114/101
Forepoles Φ159/139
0.25nails/sqm
0.40nails/sqm -0.020
Forepoles Φ114/101 & 0.25nails/sqm
Forepoles Φ159/139 & 0.40nails/sqm
-0.025
-4.00 -3.50 -3.00 -2.50 -2.00 -1.50 -1.00 -0.50 0.00
x/D



3D MODELLING AND ANALYSIS OF TUNNEL EXCAVATION WITH FOREPOLING

Bending moment distribution of the forepole umbrella
and influence of the tube length on the bending moment



3D MODELLING AND ANALYSIS OF TUNNEL’S FINAL LINING

SIMULATION OF THE GEOMATERIAL TIME-DEPENDENT BEHAVIOUR

εε c r
cr

Γ ι α σ υ γ κ ε κ ρlevel ο q/q/f q f
Stress ι μ έ ν q
ε cr,tdt d
ε c r,

0.50ε cr,tdt d
0 .5 ε c r,

t 5t 0 % t
td tt
50% d

Creep strains



PROBABILISTIC ANALYSIS IN TUNNELLING
Variation of tunnel loads Reliability analysis of reinforced and unreinforced
FL
Load coefficient ε τofβ λvariation p Vp) (%)

1 0 0 .0 4 .0
Convergence - Confinement Method

Ε π ι μ Tunnelν τloadsς partial φ factor γ p , r e q
EC
Reinforced final lining β = 5 .6 1 (p f = 1 0 -8 )
Monte - Carlo Simulation
Σ υ ν τε λ ε σ τ ή ς μ α η τό τη τ α ς , V (%

β = 5 .2 0 (p f = 1 0 -7 )

έ ρ ο υ ς σ υ ε λ ε σ τ ή μ ό ν ιμ ω ν ο ρ τ ίω ν ,
8 0 .0 3 .5
β = 4 .7 5 (p f = 1 0 -6 )
β = 4 .2 6 (p f = 1 0 -5 )
3 .0
6 0 .0

2 .5
4 0 .0

2 .0
2 0 .0

1 .5
0 .0 γ g ,E C = 1 .3 5
0 .0 0 0 .1 0 0 .2 0 0 .3 0 0 .4 0 0 .5 0 0 .6 0
Μ έ σ ο α ν η γ μ έ ν ο φ ο ρ τ ίο , m p /p 1 .0
Mean tunnel load m p /p o,m
o
0 .0 0 0 .2 5 0 .5 0 0 .7 5 1 .0 0 1 .2 5 1 .5 0
Α ν η γ μ έ ν η α ξ ο ν ικ ή δ ύ ν α μ η ν d (Γ ια V p = 1 0 % & γ p = 1 .3 5 )
Normalized final lining axial force
6 5 0 .0 8 .0 0 8 .0 0
Point Estimation Method (a ) Unreinforced final lining (b )
6 0 0 .0 m a x im u m
7 .5 0 7 .0 0
5 5 0 .0
tunnell load ((kPa)
tu n n e lo a d k P a )

e /h
7 .0 0 6 .0 0

r eReliability i index ββ )
r e lia b ilit y in d e x ( β )

5 0 0 .0

lia b ility n d e x (

UC
average

=0
4 5 0 .0 6 .5 0 5 .0 0

.1 0
4 0 0 .0 6 .0 0 4 .0 0
γ C = 1 .8 0

e/
m in im u m

h
3 5 0 .0 5 .5 0 3 .0 0

UC
=0
3 0 0 .0

.2
5 .0 0 2 .0 0

0
γ C = 1 .5 0 e /h
2 5 0 .0
0 .0 9 40 . .50 0 1 8 0 .0 2 7 0 .0 3 6 0 .0 UC = 0 .3 0
1 .0 0
aAngle ( (o )
n g le )
4 .0 0 0 .0 0
0 .0 0 0 .1 0 0 .2 0 0 .3 0 0 .4 0 0 .5 0 0 .6 0 0 .0 0 0 .1 0 0 .2 0 0 .3 0 0 .4 0 0 .5 0 0 .6 0
V P
V
Coefficient of Pvariation V p



EXPERIENCE ON GEOTECHNICAL AND TUNNEL DATA BASE DEVELOPMENT

Associates, Prountzopoulos, G. & Fortsakis, P.,
Participated in the Research on the behaviour of
geomaterials during the construction of the Egnatia Odos
tunnels and on the factors defining the final cost of
construction (Egnatia Odos S.A.) .

Marinos, V., Prountzopoulos, G., Fortsakis, P., Koumoutsakos, D. & Papouli, D. (2012) ,
Tunnel Information and Analysis System: A geotechnical database for tunnels .
Geotechnical and Geological Engineering . doi: 10.1007/s10706-012-9570.



TUNNEL AND CULVERT REHABILITATION


ON SITE FOLLOW UP ENHANCES COMPANY’S RELIABILITY & EXPERIENCE

CONSTRUCTION FOLLOW-UP AND CONSULTING



DETAILED CONSTRUCTION DESIGN



DETAILED CONSTRUCTION DESIGN AND ON-SITE SUPPORT



DETAILED CONSTRUCTION DESIGN AND ON-SITE SUPPORT
125 14 10 4.67

125 16 10 12.00

4 14 12.00

+7.80

2.
04 04
2.
0.15
0.46

0.15
2821 12 30/40 0.76
14.00
10

125 14
125 14
7.21

7.21
Ü
óôçí ð áñåé

(2x2)

10
5
10.65-10.2
10

7.56-7.1
6

125 14
4 14
125 14

7.56-7.1
9.50

14.00
7.46
7.46

9.50
10.65-1
(2x2) 4 14

óôçí ð
6

10
0.25
áñåé
Ü
+0.98

+0.40

± 0.00

0.15
0.46-0.20

0.15
124 12 30/40 (62x2)
0.76-0.50

0.60

1.15
1.15

0.60
1.00

1.00
-1.83 -1.83 125 14 10
1.25 1.25 2.40
0.25 125 14 10 2.40 0.25

2.00
2.00

250 28 10
2.40
-2.81 250 28 10
2.40

0.4 0
0 0.4

125 18 10 6.00 -3.41 125 18 10 6.00
1.74 1.74
1.04

1.04

535 16 1.75
0.35
1.04

1.04

1.85 1.85
0.49 0.49

0.33 0.33 0.21 0.21

1.26 1.26

êÜô 125 20 10
ù 14.00
11.48

0.02 0.05 0.02

åóù ô êÜ 130 14 10
åñé 12.00

åóù ô êÜ 150 12 10 (2x75)
åñé 12.00

1.77
1.77
0.46-0.20

532 12 10 (266x2) 4.00
0.46

28 12 10 [(7x2)x2] 4.00-3.74

1.77 1.77

åî ù ôåñé 300 12 10 (9x2+282)
êÜ 12.00
0.015

0.02
0.02 0.02
1.20
1.65-0.80

1.20 36 12 10 (9x2)x2
4.05-3.20
1.04-0.20

68 12 10 (17x2)x2
3.44-2.60

1.20 1.20
Üí ù 54 12 10 (27x2) 12.00

Üí ù 108 12 10 13.30
12.40
0.45
0.45

0.45
0.45

êÜô 152 12 10
ù 13.30
12.40

Üí ù 125 18 10 12.80

4 14 (2x2) 12.00



ON-SITE SUPPORT


HUMAN RESOURSES OF ODOTECHNIKI LTD


PARTNER AND DIRECTOR OF ODOTECHNIKI LTD

KONSTANTINOS SEFEROGLOU, Geotechnical Engineer, M.Sc.

www.linkedin.com/pub/konstantinos-seferoglou/2b/286/a

Areas of expertise:
•Extensive conceptual design experience on civil engineering, mainly infrastructure projects;
•Extensive experience in team leadership and support of multidiscipline groups;
•Geotechnical investigation, monitoring programming and evaluation;
•Tunnelling, tunnel portal analysis & design, cut & cover design;
•Slope stabilization, retaining structures, rock fall protection design;
•Assessment of slide stabilization and design of remedial measures;
•Embankment design, earthworks reconstruction and upgrade;
•Bridge foundation and deep foundation design;
•Construction follow up consulting & value engineering;
•Client and authorities communication skills;
•Total design management and coordination.

ASSOCIATES OF ODOTECHNIKI LTD

PETROS FORTSAKIS, Geotechnical Engineer, Ph.D.

www.linkedin.com/pub/petros-fortsakis/24/a7a/368

Areas of expertise:
•Geotechnical analysis and design with emphasis on infrastructure projects, mainly focused on evaluation of
geotechnical investigation data, tunnel design, foundation design, landslide rehabilitation, slope stability;
•Non-linear numerical analyses (2D & 3D) for the simulation of complex geotechnical environment and
construction procedures;
•Development of geotechnical database for the storage and evaluation of geotechnical, design, construction
and monitoring data;
•Risk analysis in geotechnical projects (sensitivity analysis, probabilistic analysis, reliability based design);
•Structural design of conventional structures.



GEORGIOS PROUNTZOPOULOS, Geotechnical Engineer, Ph.D.

www.linkedin.com/in/prountzopoulos

Areas of expertise:
•Design of tunnels with focus on the specific engineering geological and geotechnical behaviour of rock and
soil formations;
•Tunnel face stability, tunnel face reinforcement and protection design, using rational methods, with focus on
face nailing and steel tube umbrella in shallow tunnels;
•Numerical analyses with the use of finite element codes;
•Evaluation of geotechnical investigation data for rocks and soils;
•Design of geotextile reinforced soil structures, for use in road and rail embankments, retaining structures,
bridge foundations;
•Landslide rehabilitation;
•Stability of big scale slope cuts in large open mines;
•Risk assessment associated with civil engineering works due to rock falls and landslides in highways and
secondary roads.


FRAGISKOS CHRYSOHOIDIS, Engineering Geologist, M.Sc.

www.linkedin.com/pub/fragiskos-chrysohoidis/48/808/a59

Areas of expertise:
•Geotechnical Investigation | Planning, Supervision & Evaluation;
•Geological and Geotechnical Design (field and desk work);
•Geotechnical Monitoring | Scheduling and Assessment.



ISABELLA VASSILOPOULOU, Structural Engineer, Ph.D.

www.linkedin.com/pub/isabella-vassilopoulou/46/871/304

Areas of expertise:
•Structural analysis and design with emphasis on infrastructure design;
•Resistance of the structural system, the elements and the cross-sections;
•Investigation and solution proposal for earthquake-resistant design with real life experience in the local
industry planning and execution;
•Involvement in analysis and design of structures under extreme loading conditions, including both seismic
and wind settings;
•Inspection and assessment of nonlinear static and dynamic structural behaviour. Concentration on tension
structures with the engagement of finite element method;
•Preparation or supervision of construction drawings.



EVA XENOU, Structural Engineer, M.Sc.

www.linkedin.com/pub/eva-xenou/46/3bb/b00

Areas of expertise:
Structural analysis and design of structures (mainly infrastructure related civil engineering projects) including:
•3D modelling and linear/non-linear numerical analyses;
•Resistance of the structural system, the elements and the cross-sections;
•Static analysis of structures under permanent, live, accidental, thermal and ground-settlement loads;
•Dynamic analysis of structures under seismic combinations;
•Foundation bearing capacity;



LEFTERIS CHRISOS, Structural Engineer

www.linkedin.com/pub/lefteris-chrisos/53/26/353

Areas of expertise:
•Structural analysis and design of structures;
•3D modelling and linear/non-linear numerical analyses;
•Extensive experience on structural analysis and design of metro stations, buildings and bridges;
•Dynamic analysis of structures under seismic combinations;


ODOTECHNIKI LTD

CONTACT US FOR MORE INFORMATION

e-mails: info@odotechniki.gr, odotechniki@odotechniki.gr
Tel. +30 210 8228052, +30 210 8222127, Fax. +30 210 8233003

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