SUSTAINABILITY - HAMBURG METRO LINE U5 | PROJECT
Left, figure 4:
View into the excavation pit of a dock in Sengelmannstraße
The lining of the bored tunnel is steel fibre reinforced
concrete (SFRC) rings (7+0) formed of 500mm-thick segments, 1.50m wide. Polypropylene (PP) fibres are used in the production of the segments to ensure fire protection requirements are met. The joints are sealed against groundwater by means of pressurised water- retaining sealing frames.
2.3 Implementation of Sustainability Approaches in Planning and Construction Hochbahn U5 Projekt GmbH has developed a two-pillar reduction strategy for planning and construction in order to make Hamburg‘s mobility more environmentally friendly, and not just during the operation of the U5. The first pillar comprises the optimisation of all
planning services, and the second the minimisation of CO2
during construction of the U5. This has already
led to successes in the use of materials and planning optimisation for the first section of U5, currently under construction. These are primarily the result of the consistent implementation of the following measures:
● Contracts for construction are only awarded to companies that are committed to using environmentally-friendly building materials, in particular by using the most environmentally-friendly cements and steels available on the market;
● Saving material quantities through adapted construction methods and processes;
● Implementation of sustainable land management, including logistics; and,
● Exclusive use of green electricity.
For example, the mandatory use of environmentally- friendly steel and cement has been included in the tenders and contract awards for the first section of the Hamburg Line 5 project. As a result, only reinforcement steel with highly recycled content (maximum 500kg CO2e/t) has been
used in the first two construction lots, since 2024. In construction Lot 2 (launch shaft U5 to Bramfeld
station), only reinforcement steel with a maximum of 400kg CO2
than initially planned. e/t will be used – and this is one year earlier
Left, figure 5:
Greenhouse gas reduction through material savings in planning
September 2025
| 13
Page 1 |
Page 2 |
Page 3 |
Page 4 |
Page 5 |
Page 6 |
Page 7 |
Page 8 |
Page 9 |
Page 10 |
Page 11 |
Page 12 |
Page 13 |
Page 14 |
Page 15 |
Page 16 |
Page 17 |
Page 18 |
Page 19 |
Page 20 |
Page 21 |
Page 22 |
Page 23 |
Page 24 |
Page 25 |
Page 26 |
Page 27 |
Page 28 |
Page 29 |
Page 30 |
Page 31 |
Page 32 |
Page 33 |
Page 34 |
Page 35 |
Page 36 |
Page 37 |
Page 38 |
Page 39 |
Page 40 |
Page 41 |
Page 42 |
Page 43 |
Page 44 |
Page 45
