Geotechnical engineering services

Tender description

Provision of offshore and near shore Geotechnical surveys works at Arklow Bank. The work comprises 25 boreholes and 50 cone penetration tests (CPT’s) located on as yet undefined locations across the Arklow Bank development area, and associated in-situ, and geotechnical laboratory testing and factual reporting. The provision of offshore and near shore Geotechnical surveys, in order to gather sufficient geotechnical data to support the preliminary design, and in part the detailed design, of wind turbine generator (WTG) substructures and foundations. The work comprises 25 boreholes and 50 cone penetration tests (CPT’s) located on as yet undefined locations across the Arklow Bank development area, and associated in-situ, and geotechnical laboratory testing and factual reporting. The boreholes shall be composite boreholes, with a capability of sampling (push/piston, coring, hammer) and downhole CPT testing as required. Coring diameter shall be 100mm minimum. P-S downhole logging may be required. The CPT’s shall be seabed frame with a minimum 200kN push force, and be seismic and PWP capable. The contractor should assume that they will supply all management, technical support and competent labour, supervision, vessels, equipment, tools, materials, consumables, temporary works and each and all other resources necessary for the handling, transportation, unloading and receiving, monitoring, measuring, drilling, testing, and quality assurance necessary for the delivery of the work. Field works shall be completed by end September 2018, with Laboratory testing and factual reporting in early 2019. It is expected that this work will be delivered from a purpose built or suitably converted floating and/or jack up vessel(s), as deemed appropriate.