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Title: Final Technical Report Advanced Anchoring Technology DOE Award Number DE-EE0003632 Project Period 09/10 - 09/12

Abstract

It is generally conceded that the costs associated with current practices for the mooring, anchoring, or foundation systems of Marine HydroKinetic (MHK) and Deepwater Floating Wind systems are a disproportionate portion of the total cost of an installed system. Reducing the cost of the mooring and anchoring components for MHK systems can contribute substantially to reducing the levelized cost of electricity (LCOE). Micropile anchors can reduce the LCOE both directly, because the anchors, associated mooring hardware and installation costs are less than conventional anchor and mooring systems, but also because micropile anchors require less extensive geotechnical surveys for confident design and proper implementation of an anchor or foundation system. This report presents the results of the development of critical elements of grouted marine micropile anchor (MMA) technology for application to MHK energy conversion systems and other ocean engineering applications that require fixing equipment to the seafloor. Specifically, this project identified grout formulations and developed designs for grout dispensing systems suitable for use in a seawater environment as a critical development need for successful implementation of practical MMA systems. The project conducted a thorough review of available information on the use of cement-based grouts in seawater. Based on this review andmore » data available from commercial sources, the project selected a range of grout formulations for testing as part of a micropile system. The project also reviewed instrumentation for measuring grout density, pressure and flow rate, and integrated an instrumentation system suitable for use with micropile installation. The grout formulations and instrumentation system were tested successfully and demonstrated the suitability of MMA technology for implementation into anchor systems for MHK and other marine renewable energy systems. In addition, this project developed conceptual designs for micropile anchor systems and the associated drilling and grouting systems to demonstrate the feasibility and practicality of micropile anchors. This report presents several conceptual system designs for different applications. This project has concluded that grouted marine micropile anchor technology is practical and very attractive technically and financially for marine renewable energy applications. This technology is considered to be at a Technology Readiness Level 5.« less

Authors:
Publication Date:
Research Org.:
Sound & Sea Technology, Inc., Lynnwood, WA
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1054522
Report Number(s):
DOE/EE0003632-1
SST 2012-035; 1150
DOE Contract Number:  
EE0003632
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
16 TIDAL AND WAVE POWER; 17 WIND ENERGY; Advanced Anchoring Technology; Grouted Marine Micropile Anchor

Citation Formats

Meggitt, Dallas J. Final Technical Report Advanced Anchoring Technology DOE Award Number DE-EE0003632 Project Period 09/10 - 09/12. United States: N. p., 2012. Web. doi:10.2172/1054522.
Meggitt, Dallas J. Final Technical Report Advanced Anchoring Technology DOE Award Number DE-EE0003632 Project Period 09/10 - 09/12. United States. doi:10.2172/1054522.
Meggitt, Dallas J. Fri . "Final Technical Report Advanced Anchoring Technology DOE Award Number DE-EE0003632 Project Period 09/10 - 09/12". United States. doi:10.2172/1054522. https://www.osti.gov/servlets/purl/1054522.
@article{osti_1054522,
title = {Final Technical Report Advanced Anchoring Technology DOE Award Number DE-EE0003632 Project Period 09/10 - 09/12},
author = {Meggitt, Dallas J},
abstractNote = {It is generally conceded that the costs associated with current practices for the mooring, anchoring, or foundation systems of Marine HydroKinetic (MHK) and Deepwater Floating Wind systems are a disproportionate portion of the total cost of an installed system. Reducing the cost of the mooring and anchoring components for MHK systems can contribute substantially to reducing the levelized cost of electricity (LCOE). Micropile anchors can reduce the LCOE both directly, because the anchors, associated mooring hardware and installation costs are less than conventional anchor and mooring systems, but also because micropile anchors require less extensive geotechnical surveys for confident design and proper implementation of an anchor or foundation system. This report presents the results of the development of critical elements of grouted marine micropile anchor (MMA) technology for application to MHK energy conversion systems and other ocean engineering applications that require fixing equipment to the seafloor. Specifically, this project identified grout formulations and developed designs for grout dispensing systems suitable for use in a seawater environment as a critical development need for successful implementation of practical MMA systems. The project conducted a thorough review of available information on the use of cement-based grouts in seawater. Based on this review and data available from commercial sources, the project selected a range of grout formulations for testing as part of a micropile system. The project also reviewed instrumentation for measuring grout density, pressure and flow rate, and integrated an instrumentation system suitable for use with micropile installation. The grout formulations and instrumentation system were tested successfully and demonstrated the suitability of MMA technology for implementation into anchor systems for MHK and other marine renewable energy systems. In addition, this project developed conceptual designs for micropile anchor systems and the associated drilling and grouting systems to demonstrate the feasibility and practicality of micropile anchors. This report presents several conceptual system designs for different applications. This project has concluded that grouted marine micropile anchor technology is practical and very attractive technically and financially for marine renewable energy applications. This technology is considered to be at a Technology Readiness Level 5.},
doi = {10.2172/1054522},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {11}
}