Rehabilitation of a DN 400 water pipe in Spain

Leaking asbestos cement water pipe supplying various villages in the Madrid mountains near the Guadarrama National Park

System

Rehab

Medium

Water

Application area

Utility

Line type

Transport line

Country

Spain

Region

Madrid

Situation

An old DN 400 drinking water main made of asbestos cement was in urgent need of rehabilitation since recent pipe breaks temporally interrupted the water supply for the residents of nearby villages. Due to the time available and the accessibility of the line, the trenchless renovation with Primus Line® was preferred to an open construction method.

Special features

Landscape and geology

Due to rocky landscape and the geology of the terrain, an open construction would have been costly and difficult

Reduced risk of failure

To reduce the risk of failure of the alternative water supply, only 4 days were planned for the entire renovation work

Emission savings

A carbon footprint analysis showed amazing results regarding emission savings of trenchless technologies compared to open construction

Technical details

Material of host pipe

Asbestos cement

Diameter of host pipe

DN 400

Transported fluid

Potable water

Operating pressure

5 bar

Total length

700 m

Number of sections

2 sections of 390 and 310 m

Number of bends

none

Installation time

4 days

Why Primus Line®?

Environmentally friendly solution in a sensitive area

Reduction of approximately 86% in carbon emissions due to a reduced number of truck loads required (minus 99%), but also to the much shorter use of excavators when digging the trenches and construction pits, leading to a significant saving in fuel consumption (minus 87%)

Geology with ragged environment

Limited possibilities for conventional construction by open trench due to the ragged region and the location’s geology

Short installation time

to reduce the risk of water supply interruptions for nearby villages

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