Geotextile Tube Installation Barge
Type:
Presented during:
WODCON XIX: "Dredging makes the World a better place" - 2010, Beijing, China
Authors:
Yuichi Kamada
Abstract: Penta-Ocean constructed a temporary containment bund using Geotextile Tubes, which called “Geo-Bund” for container terminal reclamation project in Singapore. The Geo-Bund structure had unprecedented size of 1700 meters long and maximum depth of 25 meters below sea level. Its triangular cross-section showed the apex above high seawater level. The Geo-Bund had dual functions. Initially, it contained the spread of sediment plumes arising out from dredging and dumping activities, and subsequently it functions as temporary retaining wall of the filled area during the initial phase of reclamation work. The Geo-Bund was composed of exterior face wall formed from Geotextile Tubes filled with cement-mixed soil (CMS) and the core materials made up of mass filled CMS. CMS was made from clayey material dredged at site. The Geotextile Tubes were large and approx. 25 meters long, 8 meters wide and 3 meters high, and the volume of each tube at approx. 560 cubic meters. Large flexible Geotextile Tubes were carefully placed in precise positions under strong tidal current. The landing impact of these tubes was controlled not to exceed the design loads in order to prevent the rupture of geotextile material or seams. In the early planning stage of the project, Penta-Ocean had decided to build a special working vessel exclusively for installation of Geotextile Tubes under such working condition on site. Then between December 2007 and August 2008, a new installation barge was built and used to install the Geotextile Tubes that completed in July 2009. This paper describes the mechanics of the installation barge and concept of Geo-Bund construction utilizing the aforesaid barge.
Keywords: Containment Bund, Geo-Bund, Geotextile Tube, Geotextile, Cement Mixed Soil, CMS, Geotextile Tube Installation Barge