The Enlargement of the Motorway A7 North

The Tunnel StructuresTraffic, Installation, Operation, Safety

COSUF 29.10.15 1

The Extension of the Motorway A7

from Altona to the Border HH/SH

DEGES

for the Realization of

Traffic Infrastructure Projects

Information about DEGES

3

Founding

shareholders

of DEGES

1991

DEGES ( Deutsche Einheit Fernstraßenplanungs- und-bau

Gesellschaft GmbH) is a management company for the

realization of infrastructure projects.

DEGES was founded at 01.10.1991 for the realization of the

„Verkehrsprojekte Deutsche Einheit Straße“ (after the

reunification, the major part oft the motorways in the new

federal countries had to be rebuilt).

The shareholders of DEGES are the Bund(esregierung) and

those federal countries which have joined the company.

DEGES works as service provider for these countries.

Since 1991 Deges has built about 1400 km motorways

amounting to costs of 11 Mia €.

Besides the 5 new federal countries further seven countries

have joined the DEGES up to 2015.

DEGES-Projects in Hamburg

4

Extension A7 North in HH

AGENDA

1 Overview of the Project

Widening of the Motorway A7 in Hamburg

(addition of 2 to 4 driving lanes)

2 Tunnels A7 North. Structures, Traffic, Installation, Operation

3 Bi-directional Traffic and Tunnel Safety

COSUF 29.10.15 5

Extension A7 North in HH

AGENDA

1 Overview of the Project

Widening of the Motorway A7 in Hamburg

(addition of 2 to 4 driving lanes)

2 Tunnels A7 North. Structures, Traffic, Installation, Operation

3 Bi-directional Traffic and Tunnel Safety

COSUF 29.10.15 6

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Der Ausbau der A7 von AS Othmarschen bis LGr HH / SH

2010:

100.000 V/d

2010:

150.000 V/d

COSUF 29.10.15 7

Der Ausbau der A7 von AS Othmarschen bis LGr HH / SH

AltonaStellingenSchnelsen

COSUF 29.10.15 8

Der Ausbau der A7 von AS Othmarschen bis LGr HH / SH

Length of the total stretch: 11,6 km

Three sections for planning and construction (Schnelsen, Stellingen, Altona)

The structures

Three new tunnels: Schnelsen 560 m, Stellingen 980 m,

Altona 2000m

Cantilevered noise shelter walls 9 m high: 4400 m

Vertical noise shelter walls 7,5 m high: 3200 m

Bridges: 11

Traffic Sign Bridges: 90

Status of the sections in Oct 2015:

Schnelsen: in construction

Stellingen: Bridge Langenfeld in construction, rest in allocation

Altona: in 2016 start of the planning approval

COSUF 29.10.15 9

Der Ausbau der A7 von AS Othmarschen bis LGr HH / SH

COSUF 29.10.15 10

Section Altona

Der Ausbau der A7 von AS Othmarschen bis LGr HH / SH

Bahrenfelder

Chaussee

Elbtunnel

Section Altona with cover

of 2000m

COSUF 29.10.15 11

Der Ausbau der A7 von AS Othmarschen bis LGr HH / SH

COSUF 29.10.15 12

Section Stellingen

Der Ausbau der A7 von AS Othmarschen bis LGr HH / SH

Section Stellingen with

cover of 960 m

COSUF 29.10.15 13

Der Ausbau der A7 von AS Othmarschen bis LGr HH / SH

COSUF 29.10.15 14

Section Schnelsen

Der Ausbau der A7 von AS Othmarschen bis LGr HH / SH

COSUF 29.10.15 15

Section Schnelsen with cover

of 560 m

Der Ausbau der A7 von AS Othmarschen bis LGr HH / SH

COSUF 29.10.15 16

Design Competition Tunnel Schnelsen

First Prize: Pola Landschaftsarchitekten Berlin

Der Ausbau der A7 von AS Othmarschen bis LGr HH / SH

COSUF 29.10.15 17

Cantilevered Noise shelter walls; up to Heigth 9 m

COSUF 29.10.15 18

Der Ausbau der A7 von AS Othmarschen bis LGr HH / SH

Architectural Design

Portal Tunnel Stellingen

Film Overflight A7 North

Enlargement A7 North in HH

AGENDA

1 Overview of the Project

Widening of the Motorway A7 in Hamburg

(addition of 2 to 4 driving lanes)

2 Tunnels A7 North. Structures, Traffic, Installation, Operation

3 Bi-directional Traffic and Tunnel Safety

COSUF 29.10.15 20

Enlargement A7 North in HH

Cross Section Tunnel Stellingen

Standard clear width of tunnel tubes: 2 x 21m; max. width 31m

Clear heigth: 4,80m (up to the concrete slab: 5,10m)

Earth cover: 1,20m

Cross passages spaced every 60m

COSUF 29.10.15 21

Start to Final State Tunnel Stellingen

2. Analyse der bauzeitlichen Erfordernisse

bestehender Zustand

Final State

COSUF 29.10.15 22

Enlargement A7 North in HH

Start

Enlargement A7 North in HH

Tunnel building with maintaining traffic (basic solutions)

First basic solution (detour, temporary closure, reduction)

• Traffic diversion on detour route (z.B.: Umleitung des Verkehrs in der Nacht: Grundinstandsetzung A2 Cityring Luzern;)

• Traffic reduction and work execution adjacent to traffic (z.B.: Grundinstandsetzung A2 Cityring Luzern)

• Uni-directional traffic in time blocks

Second basic solution (building over traffic)

• Building the tunnel slab (pre-cast elements) during short periods with complete trafficclosure (z.B.: Flughafenrollbrücken über A3 in Frankfurt).

• When the tunnels are longer, tunnelinstallation has to be executed (tested and test-operated) over/beside traffic. (z.B.: Einhausung Lövenich A1 in Köln)

Third basic solution (bi-directional traffic in one tunnel tube) = standard

• Traffic is led bi-directional in the firstly built tunnel tube. The installation is suitable for bi-directional traffic

COSUF 29.10.15 23

Main Building Steps and Traffic Routing Steps

60

State of today

Construction and Traffic Steps

Final State

Baufeld

Baufeld

Baufeld

3. Bauablauf, Baubetrieb und bauzeitliche VerkehrsführungCOSUF 29.10.15 24

Enlargement A7 North in HH

Tunnel Installation

The standard installations according to RABT (Richtlinien für die

Ausstattung und den Betrieb von Straßentunneln. Ausgabe 2006)

Longitudinal ventilation

Traffic surveillance and management system

Compensation measures for temporary bi-directional traffic

phases

COSUF 29.10.15 25

Enlargement A7 North in HH

RABT 2006:

Ventilation Systems for uni-directional and bi-directional traffic

COSUF 29.10.15 26

Enlargement A7 North in HH

Traffic surveillance and management for the chain of 4 tunnels:

Elbtunnel 3,2 km length

0,4 km open stretch

Tunnel Altona 2,0 km length

3,1 km open stretch

Tunnel Stellingen 0,98 km length

3,5 km open stretch

Tunnel Schnelsen 0,56 km length

Actions:

• Traffic surveillance and management system in the tunnels and on the open stretch

for the regular uni-directional traffic and the temporary bi-directional traffic periods

• Centrally controlled, automatic barriers for the central strip crossings and the tunnel

closure

• Sub control centers at each tunnel; main control center at the Elbtunnel

COSUF 29.10.15 27

Extension A7 North in HH

AGENDA

1 Overview of the Project

Widening of the Motorway A7 in Hamburg

(addition of 2 to 4 driving lanes)

2 Tunnels A7 North. Traffic, Installation, Operation

3 Temporary Bi-directional Traffic in one tunnel tube and Tunnel Safety

COSUF 29.10.15 28

Extension A7 North in HH

Temporary Phases with bi-directional Traffic in one Tunnel Tube (Tunnel Stellingen)

During the construction (ca. 12 months): 6:0

Final State:

• Renewal of Installation (6 months): 6:0

• After major fire incident (6 months): 6:0

• After medium fire incident (2 months): 4:0

• After major accident or minor fire incident (ca. 8 days): 4:0

• Renewal pavement (ca. 8 days): 4:0

• During Maintenance works: only closure of driving lanes

COSUF 29.10.15 29

Extension A7 North in HH

Specifications in the technical standards for temporary bi-directional traffic in one tunnel tube:

RABT:

no specifications (only for permanent bi-directional traffic)

RAA (Pkt. 8.5.2):

„Eine 4+0 Verkehrsführung wird wegen des erhöhten Aufwandes für Belüftung und Beleuchtung bei Gegenverkehrsbetrieb nicht grundsätzlich gefordert, ist im Bedarfsfalle aber möglich. Die Sicherheit für den Tunnelnutzer ist dann auf der Grundlage der RABT nachzuweisen“ (= the safety for the tunnel user has to satisfy the conditions of the RABT).

COSUF 29.10.15 30

Enlargement A7 North in HH

Temporary bi-directional traffic in one tunnel tube

and

actions for risk reduction.

Possible actions for risk reduction:

• Speed limit reduction 60 km/h (and control of the speed limit)

• Separation of the traffic directions by protection barriers

• Traffic surveillance and management for bi-directional traffic

• Emergency cross passages in short distances (60m)

• Shortening detection time using video

• Shortening breakdown disturbances by rescue crew

• Optimization fire rescue

• Special ventilation system (smoke extraction system)

• Automatic fire fighting system

• Emergency exits on both sides or rescue tunnels

• Special ventilation or constructional measures during execution period

COSUF 29.10.15 31

Enlargement A7 North in HH

COSUF 29.10.15 32

Tunnel Stellingen. Bi-directional Traffic in one tunnel tube.

Risk Analysis of compensating measures

Incidents/a

fatalities

Enlargement A7 North in HH

Suggestion for an Addition of the RABT 2006:

RABT Pkt.4.3: Temporary bi-directional traffic in one tunnel tube.

Complete compliance with the conditions for permanent bi- directional traffic in one tunnel tube is not necessary if the time period of the bi-directional traffic is limited. Actions of risk reduction can be considered according to the limited time period and the conditions of the individual case. Cost efficiency must be taken into account.

RABT Pkt. 6.1.3: Emergency cross passages.

Short distances between the emergency cross passages can be an efficient action for safety enhancement.

COSUF 29.10.15 33

Herzlichen Dank für Ihre Aufmerksamkeit

Ihr Ansprechpartner:

Dipl.-Ing. Karl-Heinz Reintjes

Abteilungsleiter Ingenieurbau im Projektbereich Nord der DEGES

Telefon: 030/20243622

E-Mail: reintjes@deges.de

COSUF 29.10.15 34

Der Ausbau der A7 von AS Othmarschen bis LGr HH / SH