The Multi-Purpose Bottom Plug for the Galataport Project Salvatore Miranda, Technical Manager, TREVI Turkey, Istanbul (Turkey); email:
[email protected] ABSTRACT: The paper describes an innovative geotechnical engineering solution that was provided by TREVI for the renovation project at Galataport in Istanbul, Turkey. Among other interesting geotechnical works included in the project, this paper also presents the design considerations and construction of the multi-purpose bottom plug (MPBP). This original geotechnical engineering solution was employed for a three-basement excavation in Karaköy and consists of a combination of seepage control, ground improvement, and load bearing elements, which were executed with double-fluid jet grouting, pseudo-elliptical jet grouting, and permanent micropiles, respectively. The paper describes each step of the design, execution, and the preliminary and final testing phases. Moreover, it highlights the importance of employing cutting-edge technologies used in deep foundation geo-construction and state-of-the-art electronic control devices, along with expertise, to obtain the desired results for this high-profile project. KEYWORDS: Ground improvement, Elliptical Jet Grouting, Bottom Plug, Liquefaction, Seepage Control, Micropiles. SITE LOCATION: Geo-Database INTRODUCTION The Port of Galata (or Galataport) is a passenger terminal for cruise liners, situated in the Karaköy neighbourhood of the Beyoğlu district in Istanbul, Turkey. The port has up to 1,200 m of coastline and covers an area of approximately 100,000 m2. It consists of two adjoining quays, the Karaköy (or Galata) Quay and the Salıpazarı Quay, extending from the Galata Bridge on the Golden Horn to Salıpazarı on the west coast of the Bosphorus.