Abstract
The paper discusses the development of a berm breakwater revetment design for protection of an artificial island on the southern shore of Sri Lanka. The island will primarily be constructed with excavated materials from the Phase 2 Hambantota Port construction activities, which include considerable volumes of slightly weathered rock. A value Engineering Study considered three different design options for the protective revetment: two rock options, conventional rubble mound and berm breakwaters, and an option using Chinapode concrete armour units. There were considerable cost-savings in choosing an Icelandic-type berm breakwater. The geometrical design rules of Icelandic-type berm breakwaters, developed by Van der Meer and Sigurdarson (2014), were used to develop different cross-sections based on different armourstone classes. Based on a quarry yield prediction and hydraulic model studies, the design was optimized using the available rock as efficiently as possible. Refinement of the design during the hydraulic model testing resulted in increased stability of the berm breakwater. Due to lack of experience in the production of large armourstone, the yield of the 5-10 tonnes class was rather low during the first months of construction. A number of measures were recommended resulting in more than tripling the yield.
Highlights
The Hambantota Port Development project is planned to develop a major industrial and service port on the southeast coast of Sri Lanka
The geometrical design rules of Icelandic-type berm breakwaters, developed by Van der Meer and Sigurdarson (2014), were used to develop different cross-sections based on different armourstone classes
The design phase included an assessment of the possible yield of large armourstone from the slightly weathered rock in the harbour basin excavation area
Summary
The Hambantota Port Development project is planned to develop a major industrial and service port on the southeast coast of Sri Lanka. It is situated along the shipping route between the Strait of Malacca and the Suez Canal. Phase 2 includes excavation of a larger basin, deep water quays and an artificial island. The paper discusses the development of a berm breakwater revetment design for protection of the artificial island, see Figure 1. As large volumes of rock would become available from the excavation, efforts have been made in the Value Engineering Study to come up with an optimized design using this rock as efficiently as possible. After preliminary designs indicated that a wide berm revetment would be feasible, a more comprehensive study was performed for further design
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
