Vitone Claudia, Federico Antonio, Puzrin Alexander M, Ploetze Michael, Carrassi Elettra, Todaro Francesco
Politecnico di Bari, Bari, Italy.
Institute for Geotechnical Engineering, ETH Zurich, Zürich, Switzerland.
Environ Sci Pollut Res Int. 2016 Jul;23(13):12535-53. doi: 10.1007/s11356-016-6317-x. Epub 2016 Feb 24.
This paper reports the results of the first geomechanical laboratory experiments carried out on the polluted submarine clayey sediments of the Mar Piccolo in Taranto (South of Italy). The study had to face with extreme difficulties for the very soft consistency of the sediments and the contaminants. The mineralogy, composition and physical properties of the sediments were analysed, along with their compression and shearing behaviour. The investigation involved sediments up to about 20 m below the seafloor, along three vertical profiles in the most polluted area of the Mar Piccolo, facing the Italian Navy Arsenal. The experimental results were used to derive a preliminary geotechnical model of the site, necessary for the selection and design of the most sustainable in situ mitigation solutions. Moreover, the experimental data reveal that the clayey sediments of the most polluted top layer do not follow the classical geotechnical correlations for normally consolidated deposits. This seems to open interesting perspectives about the effects of pollutants on the geotechnical behaviour of the investigated sediments.
本文报道了对意大利南部塔兰托马尔皮科洛湾受污染海底粘性沉积物开展的首次地质力学实验室实验结果。由于沉积物质地极其柔软且含有污染物，该研究面临诸多极端困难。分析了沉积物的矿物学、成分和物理性质，以及它们的压缩和剪切行为。调查涉及马尔皮科洛湾污染最严重区域、面向意大利海军军港的三个垂直剖面中海底以下约20米深处的沉积物。实验结果被用于推导该场地的初步岩土模型，这是选择和设计最可持续原位缓解方案所必需的。此外，实验数据表明，污染最严重的顶层粘性沉积物并不遵循正常固结沉积物的经典岩土相关性。这似乎为污染物对所研究沉积物岩土行为的影响开启了有趣的研究视角。
