The Mont Blanc Tunnel - KPT...The Mont Blanc Tunnel May 2015 5 Safe shelters Every 300 m (on the...

The Mont Blanc Tunnel

2015

The Mont Blanc Tunnel May 2015 2

Description of the structure

1. Description of the structure

2. Traffic forecast study

3. Description of the organisation

4. Road construction sites organisation 5. Daily interventions with traffic

6. Night construction sites with alternating one-way traffic

7. Night construction sites without traffic

8. Example of great projects


Date of opening to traffic : 19th July 1965Length : 11,6 km Width at its base : 8,6 m (carriageway : 7 m)Altitude of the tunnel entrance aprons : 1274 m (France) and 1381 m (Italy) Highest altitude of the carriageway : 1395,5 m (at the center of the tunnel) Rock thickness above the tunnel : over 2 km along more than 40% of its lengthDuration of crossing: 12 minutes at 60 km/h

Center of the tunnel

7 640 m 3 960 m

Features of the infrastructure


The Mont Blanc Tunnel conforms to the

European Directive 2004/54

The structure


Safe shelters

❑ Every 300 m (on the right hand side, direction Italy-France) ❑ 37 in total (numbered from 0 to 36) ❑ Surface area of about 40 m² ❑ Identified by a green door fitted with permanent lighting and

flashing lights placed on the entrance door to make them stand out better in poor visibility

❑ Connected to the evacuation passage safely positioned underneath the road level

❑ Linked along the whole length of the tunnel by the guide line “Ariadne’s Thread”


❑ Simultaneous analysis of information coming from about 35,000 control points ❑ Depending on the scenario or incident, the system advises the operator on what

configuration to activate, according to specific procedures ❑ Very useful instrument for the 2 safety and traffic operators who stay 24h/24 in

the control and command post (CCP) used for the management of the equipment and intervention teams (“Active CCP”)

A second control and command post exactly alike the first one (called “Traffic CCP”), is manned by 1 operator and used for traffic regulation and for informing partners and users. In case of incident, the operator takes care of the people waiting in the shelters through the videophone.

The centralized technical management


❑ Intake system of fresh air It allows the amount of pollutants from vehicle emissions to be controlled

• 2 ventilation plants situated at the 2 tunnel entrance aprons, each having 4 pure air fans (+ 1 as backup) with a variable flow rate from 25 to 80 m³/sec

• these fans serve the ventilation channels (4 on the French side and 4 on the Italian side) positioned under the road level, each of which covers 1450 m of tunnel, equipped with intake points every 10 m along the Italy-France tunnel wall

The ventilation system is managed entirely by computer, from detection to extraction.

Ventilation (1)


❑ Smoke extraction system It allows the extraction of 156 m³/sec over a 600 m linear section of tunnel

• 1 extraction channel which runs along the entire tunnel • 2 plants situated at the 2 tunnel entrance aprons, each

one having 2 extraction fans (+ 1 backup) • 4 relay fans inside the channel itself

(positioned under the stopping areas 6, 14, 22 and 30)

• 115 extraction points in the roof (“carneaux”), one every 100 m, fitted with remote controlled dampers

Ventilation (2)


❑ Longitudinal air speed control system• 20 anemometers installed every 600 m, that

permanently measure longitudinal air speed inside the tunnel

• 76 booster fans positioned on the roof which, if activated in one direction or the other, control longitudinal air speed in the tunnel, managed by the centralized technical management

counteracting the longitudinal flow of air focusing on the zero point (less than 1,5 m/

sec of air current) along 600 m of tunnel confinement, stratification and therefore

smoke extraction facility

Ventilation (3)


❑ The main instrument adopted to guarantee safety ❑ Elaborated by a workgroup composed of experts from the

ministries of transport and of the interior of the two Countries and by representatives of the prefectures of Aosta Valley and Haute-Savoie

❑ Approved by the intergovernmental commission ❑ It prescribes:

• access conditions • traffic and behavioural rules in case of an event

Since January 2010, according to the ADR 2009, the Mont-Blanc Tunnel is classified in “class E”.

Traffic regulation


Traffic forecast study









Analysis of the traffic (1)

Daily averages


Analysis of the traffic (2)

9212Stima/Estimation

4812

81

6350145

1558

1886

41632014

Daily averages


Description of the organisation









The CIG is theadministrative authority

(Dir. 2004/54/CE, art. 4)

The COMSEC is theinspection entity (Dir. 2004/54/CE, art. 7)

Organisation – The governing institutions


DTI Technical and ITC

department

DST Safety

and traffic department

DCP Customer and tolls

department

Secretary General services

and communication

DAF Administrative and financial department

Safety officer (Dir.2004/54/CE)

Prevention / quality

Marketing

194

65 staff for emergency fire brigade 40 staff for the bi-national police service 105

Number of people for

11,6 km of tunnel

Organisation – The GEIE-TMB

CONSUR - Supervisory council 5 ATMB members + 5 SITMB members

COMDIR - Management committee 1 Managing director + 2 Directors


Road construction sites organisation









❑ Maintenance and daily interventions ❑ Night construction sites with alternating one-way traffic ❑ Night construction sites without traffic ❑ Example of great works

Internal:DTI: 50 people– interventions from Monday to Friday from 06:00 a.m. to 10:00 p.m. Availability service in the other times.Intervention procedures, formation/information;

For external companies:Contracts; intervention procedures;Safety documents (PdP, DUVRI, PGC, PSC, PPSPS…);Work permission.

THE PRIORITY: Users and staff safety

Description of road construction sites organisation


Daily intervention with traffic









❑ Maintenance plan: 713 items - Electrical sector - Mechanical sector - Civil engineering sector - Informatics sector

❑ Remedial interventions ❑ 111 maintenance contracts ❑ In 2014 : 11 000 interventions




• Decennial maintenance of moto-ventilators groups


Night construction sites with alternating one-way traffic



3. Description of the organisation du tunnel

4. Road construction sites organisation

5. Daily interventions with traffic





❑ Planning realised 1 year beforehand

❑ One-way alternating traffic, from 10 p.m. to 6 a.m.

❑ 4 construction sites maximum

❑ On average, 80 nights a year


Closed in both directions

Open North

Open South

23:0022:30 23:30 23:45 0:30 00:45 1:30 1:45

1:45 2:30 2:45 3:30 3:45 4:30 4:45

5:154:45 5:30 6:00


Night construction sites without traffic









❑ Planning realised 1 year beforehand

❑ Closing down from 10 p.m. and 6 p.m.

❑ 40 - 55 sites construction, 150 – 200 people in the tunnel

❑ In 2014, 10 nights with total traffic interruption




• IDENTIFICATION OF THE CONSTRUCTION SITE AND DESCRIPTION OF THE INFRASTRUCTURE

• CONSTRUCTION SITE ORGANISATION• RISKS ANALYSIS• WORKS ORGANISATION


Exemple de grand projet




4. Road construction sites organisation

5. Daily interventions with traffic





❑ Deck road deterioration on 600 m in the middle of the tunnel

❑ Corroded steels because of chloride presence

❑ Necessary to repair it in the medium term

Extraordinary civil engineering operations


❑ Two solutions are investigated : ❑ Restructuration ❑ Dismantling- reconstruction

Extraordinary civil engineering operations

… a synergy that, in these 13 years of operation, has been tested during safety exercises, events and works

allowed to reach satisfying results.The system

sOrganisation

The

peop

le

Thank you for your attention.Merci de votre attention.

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