A floating tunnel structure is surrounded by water. Since about 1900, more than 100 merge tunnels have been extending. In this paper, after a general presentation of the submerged floating tunnel sft as an attractive technical solution for waterway crossings. Preliminary design problem definition the main objective is to design an optimal crossing alternative based on geotechnical, structural, financial, social, and environmental considerations. Norway to build worlds first floating underwater traffic.
Norway to create worlds first floating underwater tunnel video 28 jul, 2016 10. In japan, investigation on the development of the submerged floating tunnel s technology has been started from 1990 conceptual work has been done in japan at hokkaido funkawan bay, width of waterway 34km long, water depth 100m, significant wave height 9. Dynamic response and fluid structure interaction of submerged. It is supported by cables either anchored to the earth or by pontoons floating of the. Pdf design of the submerged floating tunnel operating under. Norway to create worlds first floating underwater tunnel. Third, some background and information on sft carried out by the society of submerged floating tunnel technology research in. Jan 21, 2015 submerged floating tunnels sft for transportation must be designed to secure passengers safety in case of accidental events. In this paper,the concept and properties of submerged floating tunnels,the stateoftheart of studies on submerged floating tunnels,especially the dynamic analysis on the interaction. Submerged floating tunnels sft for transportation must be designed to secure passengers safety in case of accidental events. A submerged floating tunnel sft, also known as submerged floating tube bridge sftb, suspended tunnel, or archimedes bridge, is a proposed design for a. It is neither placed within nor bored through the ground.
In general, sft is a tubular structure that is floating at a certain depth below the surface of the water, exploiting bearing capacity derived from archimedes force, has a fixed position through a system of anchors made of cables connected to the seabed. Submerged floating tunnels possess the duofeatures of tunnels and offshore structures. One of the proposed solutions is the construction of a submerged floating tube bridge. In this chapter the concept of the submerged floating tunnel and the opportunities for possible locations are discussed. Submerged floating tunnel ppt free download as powerpoint presentation. What are the engineering challenges of building a submerged. Aug 08, 2016 submerged floating road tunnel plan execution. Introduction submerged floating tunnel sft is an innovative crossingstrait transportation which is usually suspended above the sea floor and anchored by the support system of either pontoons at the surface or the anchors fixed in the sea bed.
The main sft configuration and dimensions are shown in figure 32, and principal tunnel data are given in sec. Based on the design technology of immersed tunnel, bridge and tunnel engineering, combining the current relevant design codes or specification of civil and offshore engineering in china, the conceptual design method of submerged floating tunnel tubular segment is presented according to safety, applicability, economy, fine appearance and environmental protection. The submerged floating tunnel is a tube like structure made of steel and concrete utilizing the law of buoyancy. Submerged floating tunnel sft is a very unique marine structure whose hydrodynamic stability is maintained by a balance between buoyancy and tethering of the structure. Submerged floating tunnel ppt buoyancy civil engineering scribd.
Design of immersed tunnel and how we research submerged. The submerged floating tunnel suggested by reinertsen olav olsen group 2012 consists of twoparallel submer ged concrete tubes with an outer diameter of 12. Tunnels in water are by no means new in civil engineering in some cases immersed tunnels also used which run beneath the sea or river bed. Submerged floating tunnelsft is a kind of innovative structure used to cross great rivers,large lakes,bays and straits. Research on tubular segment design of submerged floating tunnel. There are two alternative methods to build a bored tunnel. The analysis shows that the connection joint proposed in this paper satisfies the requirement of safety under water environment and will be a. A submerged floating tunnel sft, also known as submerged floating tube bridge sftb, suspended tunnel, or archimedes bridge, is a proposed design for a tunnel that floats in water, supported by its buoyancy specifically, by employing the hydrostatic thrust, or archimedes principle. Archimedes bridge ab is a tubular structure that floats at a certain depth below the surface of the water carrying capacity exploiting derived from. Safety study on connection joint for submerged floating tunnel. As the torrent of water dried up for the first time in thousands of years, it revealed a horrific sight.
Underwater explosion is the most critical event to long submerged structures. Udahl1 1department of structural engineering, norwegian university of science and technology, norway 2department of marine technology, norwegian university of science and technology, norway abstract. Structural analyses of the submerged floating tunnel prototype in. Norway has hatched ambitious plans to install the worlds first floating underwater tunnels to help travelers easily cross the nations many fjords. The engineers can make it at other site and place it as per the requirement. On the basis of working surroundings of submersed floating tunnelsft, a new type of connexion joint is designed to link its tubes, and its mechanical behavior and safety under water condition are also analyzed by means of finite element methodfem. Norway is undertaking an ambitious project to build a fully submerged floating traffic tunnel beneath the. The purpose of the present study is to develop a dynamic analysis program for sft and investigate dynamic response characteristics of sft subjected to external environmental wave load. In japan, investigation on the development of the submerged floating tunnels technology has been started from 1990 conceptual work has been done in japan at hokkaido funkawan bay, width of waterway 34km long, water depth 100m, significant wave. Transatlantic floating tunnel powerpoint presentation ground motions for design usgs powerpoint presentation.
Melissa jennings for the strait of georgia technical advisor. Analysis of wave force induced dynamic response of submerged. Analysis of wave force induced dynamic response of. Application of suction caissons to submerged floating. Submerged floating tunnels seminar report,pdf,ppt,doc. One of the proposed solutions is the construction of a submerged floating tube bridge sftb, that, when built, will be the first of its kind worldwide. The submerged floating tunnel utilizes lakes and waterways to carry traffic under water and on to the other side. The scandinavian country norway is going to be in an extraordinary engineering project to make submerged floating road tunnel.
In this paper, first, shock waves and impulse pressures generated by an explosive away from the sft are expressed by the formulas coming from the experimental results. These types of floating tunnel never have been attempted in large scale. Research on type selection of submerged floating tunnel of. An sft, unlike an immersed tunnel, still has to deal with waves and currents, changes in water density and local variations in buoyancy, not to mention the possibility of a collision with ships, macrofauna, and submarines. A submerged tunnel is a tunnel that floats in water, supported by its buoyancy. The position of the tunnel relative to the surface is in this concept defined by mooring with tethers to the bottom at four positions along the bridge. Dynamic response and fluid structure interaction of submerged floating tunnels s. Submerged floating tunnel seminar pdf report and ppt. This allows submerged tunnel approaches to be shorter andor approach gradients to be flatter an advantage for all tunnels, but especially so for railways. The tube is placed underwater, deep enough to avoid water traffic and weather. Floating underwater tunnels planned for norway seeker. In authors opinion, the submerged floating tunnel sft technique will be the next generation of imt technique. This report illustrates the outcome of the submerged floating tunnel sft analysis project, carried out by the danish road institute, the norwegian road research laboratory and the italian company ponte di archimede nello stretto di messina spa, with financial support by the european union. This route crosses several fjords which are characterized by great widths up to 5 km and depths up to 1 km where nonconventional engineering solutions will be necessary.
Giulio martire the development of submerged floating. Submerged floating tunnel ppt buoyancy civil engineering. Submerged floating tunnels seminar report, ppt, pdf for. A floating tunnel obviates those problemsand shouldnt be any more expensive than the sanersounding. Global response of submerged floating tunnel against. Study on submerged floating tunnel characteristics under the. Research on tubular segment design of submerged floating. Second, the developments of sft in italy, spain and norway are briefly discussed. Sft can be applied as a fascinating solution for connecting two shore areas separated by narrow and deep sea strait, lake, or rivers, where it is. Transverse earthquake response and design analysis of. Transatlantic floating tunnel powerpoint presentation. Also explore the seminar topics paper on submerged floating tunnels with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year civil engineering ce or ieee civil construction btech, be, mtech students for the year 2015 2016.
The submerged floating tunnel allows construction of a tunnel with a shallow alignment in extremely deep water, where alternatives are technically difficult or prohibitively expensive. The submerged floating tunnel is an innovative concept for crossing waterways, utilizing the law of buoyancy to support the structure at a moderate and convenient depth. Introduction submerged floating tunnel sft or bridge floating in water is a new concept in the field of transport infrastructure. Ppt floating tunnel powerpoint presentation, free download. Oct 30, 2016 model submerged floating tunnel ce student. An arched submerged floating tunnel has shown to be a safe and sound concept well suited to fulfill its intended functions during its planned life time. Under water a weight reduction takes place which lowers the loads to be carried by the tunnel. On the basis of working surroundings of submersed floating tunnel sft, a new type of connexion joint is designed to link its tubes, and its mechanical behavior and safety under water condition are also analyzed by means of finite element methodfem. Preliminary design problem definition the main objective is to design an optimal crossing alternative based on geotechnical, structural. The hydrodynamic force induced by earthquake excitations is formulated to simulate real. First, the interesting features of sft are described. Although the idea is not new, norway is the first country to make it executable. The equation of motion of the cable is obtained by a mathematical method utilizing the euler beam theory and the galerkin method. Therefore, adhering to the natural conditions of qiongzhou strait, submerged floating tunnel is the best and most suitable scheme for crosssea passageway.
It supported on columns or held in place by tethers attached to. This page contains submerged floating tunnels seminar and ppt with pdf report. Nov 08, 20 submerged tunnels can be placed immediately beneath a waterway. But when the bed is too rocky,too deep or too undulating submerged floating tunnels are used. Tunnels in water are by no means modern in civil engineering. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising.
Transverse earthquake response and design analysis of submerged floating tunnels with various shore connections jian xiao, guojun huang laboratory of environmental engineering, institute of mechanics, chinese academy of sciences, beijing 100190, china. Submerged tunnels can be placed immediately beneath a waterway. It was reported recently by the engineering blog hackaday. Submerged floating tunnel seminar pdf report and ppt study mafia.
In contrast, a bored tunnel is usually only stable if its roof is at least its own diameter beneath the water. T he sft is putting a tubularshaped structure at a certain depth below the surface of the water using buoyancy as its carrying capacity. It supported on columns or held in place by tethers attached to the sea floor or by pontoons floating on the surface. Drillingblasting method or by using a tunnelboring machine. A simplified analysis model of cable for submerged floating tunnel subjected to parametrically excited vibrations in the ocean environment is proposed in this investigation. Sumit thakur civil submerged floating tunnels seminar and ppt with pdf report. Submerged floating tunnel is an innovative tunnel infrastructure passing through the deep sea independent of wave and wind so that high speed vehicle or train can run. The submerged floating tunnel allows construction of a tunnel with a shallow alignment in extremely deep water. Study on submerged floating tunnel characteristics under. Submerged floating tunnel is an innovative tunnel infrastructure passing through the deep sea independent of. Design of the submerged floating tunnel operating under various conditions article pdf available in procedia engineering 4. Melissa jennings for the strait of georgia technical. The submerged construction will be able to cope with rough weather that is typical for the country.
Download from so many useful civil engineering files for free. The submerged floating tunnel in fig 1 is proposed to cross a norwegian fjord with a maximum depth of 150 meters and a crossing distance of 1500 meters. The big advantage of a floating submerged tunnel compared to a bridge is the lightly loaded construction. This technique has not yet been realised, but one project, in norway, is currently in the design phase.
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