N21 Newcastle West and Abbeyfeale Road Schemes - Ground Investigation

Description

The project involves the planning, sequencing and construction of the investigation locations to provide the required ground investigation data to enable the preliminary design of the N21 Newcastle West and Abbeyfeale Road Schemes at two separate sites, at Newcastle West and Abbeyfeale, Co. Limerick The Investigation provides for boreholes utilising cable percussion and rotary drilling/coring techniques to extend down through overburden soils and into rock where required. Trial pits to a maximum depth of 4.5m will also be undertaken to make observations on the ability of ground materials to excavate, the descriptions and stratification of soils and other materials present along with in situ testing by other techniques as appropriate. Dynamic Probing will be undertaken to determine the extent of soft ground along the route. For the majority of cases, standpipe construction will be required to enable hydrogeological testing and to carry out long term monitoring of the groundwater regime, particularly where adjacent to watercourses or in areas of notable flooding. Geo-environmental sampling and analysis will be required including in areas where made ground or potential contamination may be present. These investigations include green and yellow category locations which may not be advised or scheduled until the fieldwork is underway, depending on when and how the areas are identified. The Contractor must undertake fieldworks, installations and monitoring, laboratory testing and preparation of a factual report in accordance with the Specification.