Hahn Kunststoffe

Segment Storage

The same applies for every tunnel project: segments must be at the right place at the right time. Towards this end, special demands are posed on the transport and storage of these weighty concrete elements.

Segments are generally stored in piles of rings. In the process, the high intrinsic weight of the elements results in extremely high loads on the lower rings and the bearing blocks (supports). The minimum height of the supports depends on the thickness of the segments, their varying inner and outer radii and the applied clamp of the bridge crane. In this way, mutual contact between the...

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Issue 05/2018 Segment Storage

New mago Load Distribution Board

Until now, normal untreated hardboard has been used as load distribution boards. For the purpose of rationalisation, these boards are mostly glued on immediately after segment production. Then the...

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Issue 01/2015 France/Saudi Arabia

Acimex supplies Vacuum Technology for Riyadh Metro

The French company Acimex, specialized in vacuum handling technology, announced its supply of a segment erector system as well as a segment trolley to the EPB TBM made by the French manufacturer NFM...

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Issue 03/2011 Herrenknecht Formwork Days 2011

All around Concrete Segments

New trends in the field of tunnel lining were discussed on the 3rd and 4th of March, 2011 in the Europa Park in Rust. Designers, representatives of construction companies and precast concrete segments...

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Issue 07/2010

Adjustable flexible segment lining

Mechanical tunnelling has gained increasing importance over the past years. This tunnelling method, e.g. with a shield machine, provides a high degree of security for the tunnelling team. With...

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Issue 03/2009 New Products

New Excluder Grease for Tunnel Boring Machines from BASF Bauchemie

BASF’s Bauchemie division has introduced its own production plant for the main bearing excluder grease market. The new product series, MEYCO® BSG excluder greases for tunnel boring machines was...

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