Technical specifications

Project description

• Conversion and extension of the suburban railway station at main station, enlargement of the platforms across the DB (German Railway) track field, tunnel ceiling cover 2.5 m
• Replacement of bored pile walls and outer walls of the existing structure by a beam-column system connected monolithically to the existing structure as well as to the inner lining of the platform extension.

Construction method

• Mining technique (conventional method) protected by a pipe umbrella, length 46 m, manned pipe jacking with forward shield; diameter 1,600 mm two start shafts Inner lining of watertight reinforced concrete
• Enlargement using conventional methods in two partial cross-sections (roof section and then base) with SCL lining, max. depth of advance 1.0 m, jet underpinning approx. every 7.0 m

Geology

• Coarse clay with peat inclusions
• marl
• area with high probability of explosive ordnance