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隧道建设(中英文) ›› 2019, Vol. 39 ›› Issue (6): 901-912.DOI: 10.3973/j.issn.2096-4498.2019.06.001
DING Hao, CHENG Liang*, LI Ke
丁浩, 程亮*, 李科
摘要:
Construction of submerged floating tunnel (SFT) is one of the major solutions for fjord crossing projects and deep sea crossing projects in the future. Aimed to solve the key problems in SFT construction, the authors present an overview on the progress of the researches made in China and other countries in recent years on crosssection of SFT, dynamic response of SFT segment structure, vortexinduced vibration of anchor cable, testing technique and applicability of SFT, summarize the critical problems in the dynamic response research of SFT structures and make prospect on the trend of further SFT research. Conclusions are drawn as follow: (1) In the aspect of crosssection design, SFT with earshaped or elliptical crosssection has good stability in the complex environment of flowing water, with factors comprehensively considered, such as crosssection of SFT segment structures, buoyancyweight ratio and layout. (2) In the aspect of dynamic response of structures and anchor cables, the current research methods are mainly based on theoretical derivation and numerical simulation, and poorly rely on modelbased testing technique; therefore, it is necessary to perform model tests under combined loads from the environment, traffic and SFT, for mutual check between the theoretical analysis and numerical model. (3) In the aspect of applicability, it is necessary to build small SFT in feasible water conditions to make research on the physical SFT in the static waters, to identify problems and to lay a foundation technically for building large SFTs in the complex sea conditions.
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