Overview on the structural features of Submerged Floating Tunnels

Jiang, Bolin; Liang, Bo; Faggiano, Beatrice; Iovane, Giacomo; Mazzolani, Federico M.

doi:10.1201/9781315189390-115

Cited by 2 publications

(1 citation statement)

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“…The SFT, also known as Archimede's Bridge, is an innovative technology conceived for crossing sea straits, lakes or rivers. It consists of a tube immersed in the water, in which dead and live loads on the structure are balanced by the buoyancy [1][2][3][4]. The structure is held in position through different types of anchor systems, like for example cables, pontoons, piers, to be selected essentially depending on the width of the crossing and the water depth [2].…”

Section: Introductionmentioning

confidence: 99%

Cementitious materials with biological additive for enhanced durability in marine environment

Iovane,

Kim,

Tizzano

et al. 2023

ce papers

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Concrete structures suffer from cracking that leads to deterioration and shortening of service life. This is very critical for underwater structures, i.e., immersed bridge piles, immersed tunnel or submerged floating tunnels, which are consistently susceptible to ingress of harmful ions (chloride, sulphate and carbonate ions). Autonomous healing of concrete cracks can be beneficial to assure durability performance during the service life. In this context the paper presents a preliminary experimental activity carried out to study the self‐healing capacity of cementitious composites in marine environment. Four series of paste samples are prepared to evaluate the autonomous healing capabilities, achieved through biotic and abiotic additions. The experimental campaign is articulated in four phases, such as: specimen preparation; tests in compression; immersion in water; crack healing evaluation. The specimen performances are examined and compared in terms of mechanical strength and crack width healing over time. Results highlight the efficiency of the technology for crack healing.

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