Norway – Works for complete or part construction and civil engineering work – 1001386 Ramstadåsveien and others (Plant 1845)

The project includes several pipeline stretches in the municipality. The project shall renovate the existing water pipelines mainly by blocking out, and new water pipelines/wastewater pipelines/AF pipelines/surface water pipelines shall be laid when excavating. Some pipeline stretches that go over private property shall be redeveloped. The project covers several pipeline stretches that must be renovated due to various reasons. The stretches are selected based on, among other things, rupture frequency, age and dimension. The existing pipeline installations are mainly from the years 1915-1930. New ditches shall be dug, new wastewater and surface water pipelines will also be laid. Some pipeline stretches that go over private property shall be redeveloped. This involves considerable excavation work inside private properties, as new service pipes must be laid up to the current drilling point. In some places this can be solved by pulling new service pipes into the water pipeline that is laid down. Most water manholes shall be replaced with prefabricated systems. In addition, if new water manholes replace the existing water manholes with a gutter system, a separate wastewater manhole is to be put down. When blocking out, pull with an overhead pipe to service pipes together with the new water pipeline. The main rule is that all service pipes shall be connected to the water manhole and there shall not be buried anchorages. Where, for various reasons, it is very far from the service line to the nearest water manhole, or it is difficult to lead the service pipes to water manholes, a double pipe can be drilled or set double-blown with a thread-free outlet on a pipeline. In such cases a simple service pipe foam is to be put without a bottom around the pipeline and the anchorage, so that the anchorage is available. Several service pipes can be carried to such a manhole. See PART 2 Contract documentation for detailed information on the project.