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Page 5 Contractors World Vol 2 No 10


First underground rail line for Panama City

The capital of Panama is not only the politcal, economic, cultural and tourist centre of the country; with a population of some 700,000 people it is also the biggest city. Work is currently underway to build Panama City’s frst underground rail line. The infrastructure project, to install a line running some 13.5 kilometres, is aimed at reducing car and bus trafc congeston and enhancing transport links for locals and tourists alike.

BAUER Fundaciones Panamá S.A., a subsidiary of the German BAUER Spezialtefau GmbH, has been contracted by a Brazilian/Spanish joint venture – Consorcio Línea Uno – to install the excavaton pit walls for four of the total of eight underground statons currently planned. The work involves cutng approximately 36,000 square metres of 1 metre thick diaphragm wall at cutng depths between 25 and 30 metres. One of the statons is also planned to serve as the start shaf for the tunnel bore machine.

The subsidiary of BAUER Spezialtefau GmbH began cutng work for the frst staton in Panama City in late June. Work on the second staton started in early August. The work is being carried out by two Bauer BC 40 cuters.


1,216 km in 40 months

Hamm HD+ 120 compactors assisted in the construction of the Maghreb Highway which crosses all of North Africa from Morocco to Libya in paral lel to the relatively densely populated Mediterranean coast. This axis provides more than 50 million people with a connection to ci t ies, internat ional airports, harbours and major rail lines.

Algeria is responsible for the longest segment of this highway over a distance of 1,216 km. It is investng a total of USD 11 billion into the infrastructure. About 200 km of highways around the capital city of Algiers were built in the 1990s. All of the other new segments were built with three lanes in both directons.

By building a highway of this size, the Algerian government is preparing the capacity needed to handle rapid growth in vehicle trafc. In Algeria, the route passes along the north of the Tell Atlas mountain chain and traverses some high plateaus. Due to the many tunnels and inclines that were involved, this route through mountain terrain was quite challenging for the road builders.

A 14 cm base course was laid on top of a 30 cm hydraulically bound support layer (HSL). Finally, a surface course with a height of 6 cm was laid. The aggregates were obtained directly from Algeria since the country has many quarries, especially in the north. However, the cement was imported from America.

More information: Hamm Compactors

More information: Bauer Foundations

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