Field Tests and Behaviour Analysis of Saemangeum Inner Dike Construction with Geotextile Tube Method Applied

• Published in: Irrigation and drainage 2016-12, Vol.65 (S2), p.48
• Main Authors: Park, Jong Gun, Kim, Hak Won, Ko, Jeong Hee, Park, Tae Sup
• Format: Article
• Language: English
• Subjects: Bottom trawling; Breakwaters; Coastal engineering; Computer software; Construction; Construction methods; Contamination; Copyright; Detaching; Developed countries; Dikes; Dredged materials; Dredging; Embankments; Field study; Field tests; Groynes; Hydraulic engineering; Jetties; Numerical analysis; Protection; Pumping; Shore protection; Terrain; Tests; Tubes; Workability
• ISSN: 1531-0353; 1531-0361
• DOI: 10.1002/ird.2087

Geotextile tubes hydraulically or mechanically filled with dredged materials have been successfully applied to hydraulic and coastal engineering in recent years (e.g. shore protection structures, sea dikes, groins, jetties, detached breakwaters). This method is becoming popular and has been widely applied in the developed countries of the world. It is economical as well as useful, and enables us to store and isolate contaminated materials obtained from harbour dredging. In this study, a numerical analysis was performed to investigate the behaviour of geotextile tubes in terms of various properties of the material, shape condition and pumping pressure. The computer program GeoCoPS was employed for this analysis. Also, field tests were conducted in order to identify the construction workability of Saemangeum inner dike when the geotextile tube method is applied. In the field tests, geotextile tubes of 62 m in length and 4.0 m in diameter were used. The field tests found that geotextile tubes, when filled, did not have the same diameter as the unfilled theoretical one, but might reach approximately 55% of the theoretical diameter. At that time, the effective height of a geotextile tube was about 2.2 m. The behaviour during and after construction was measured to confirm the construction method and workability, which ended in successful identification. Copyright © 2016 John Wiley & Sons, Ltd. Résumé Les tuyaux géotextiles mécaniques ou hydrauliques remplis de matériaux de dragage ont été appliqués avec succès à l'ingénierie hydraulique et côtière au cours des dernières années (par exemple l'infrastructure de protection côtière, les digues de mer, l'épi, les jetées, les brise-lames, etc.). Cette méthode devient populaire et a été largement appliquée dans les pays avancés du monde parce qu'elle est économique ainsi que utile et permet de stocker et d'isoler les matériaux contaminés provenant de dragage des ports. Dans l'étude, l'analyse numérique a été réalisée pour étudier le comportement des tuyaux géotextiles en termes de diverses propriétés du matériau, l'état de forme et la pression de pompage. Le programme informatique GeoCoPS a été utilisé pour cette analyse. Aussi, les essais sur le terrain ont été menés afin d'identifier la faisabilité de la construction de la digue intérieure Saemangeum lorsque la méthode de tuyau géotextile est appliquée. Dans les essais sur le terrain, les tuyaux géotextiles de 62 m de longueur et 4.0 m de diamètre ont été utilisés. L