| Popis: |
The currently available foundation options capable of handling both ice and wave loads on offshore structures are very few. In most cases, even the few available design options create high wave and/or ice loads, of which they must be able to withstand. In addition, the construction and installation procedures of these foundations are challenging to undertake due to often high environmental loads, short weather windows, and limited accessibility. This Application Case within WP15 of the HOLISHIP project refers to the conceptual design of an offshore foundation concept to manage both wave and ice loads in shallow waters with soft bottom seabed. Specifically, this chapter outlines the concept design, the structural analysis, and early project cost estimates of the construction, transportation and on-site installation. The adopted approach is holistic by looking into all main issues of the platform design, of construction installation and life-cycle cost. The application area selected for this study is the Northeast Caspian Sea. However, the concept is also well suited for other regions of the world with similar conditions. The concept can be used in hydrocarbon field development, bridge piers, oil piers (offshore loading facilities), wind turbine foundations, channel markers, lighthouse foundations, dolphins and harbour berth wall structures. In the concept development work, basic structural assessment and cost estimation tools and models have been developed. They have been integrated into the HOLISHIP concept design platform based on CAESES® enabling the iterative or optimisation designs in future feasibility studies. |
