The Experts below are selected from a list of 60 Experts worldwide ranked by ideXlab platform
Ahmet Gursoy - One of the best experts on this subject based on the ideXlab platform.
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Immersed steel Tube Tunnels in the u s a historical survey
IMMERSED TUNNEL TECHNIQUES 2. PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ORGANIZED BY THE INSTITUTION OF CIVIL ENGINEERS IN ASSOCIATION WITH THE INST, 1997Co-Authors: Ahmet GursoyAbstract:The history of the use of Immersed Tube Tunnels in the United States is outlined illustrating that steel has been in use for this purpose since the construction of the Michigan Central Railroad Tunnel in 1910. The technique has evolved into two district variations: single-shell and double-shell construction. Examples are given of the design of each type. Various aspects of construction are briefly discussed including foundations, the launching and transport of Tubes, concrete linings, tremie and rubber gasket joints, closure joints and joints designed to accommodate seismic movement. The advantages of steel Tube tunnelling are listed. For the covering abstract see IRRD 895561.
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Immersed Tube Tunnels
1996Co-Authors: Ahmet GursoyAbstract:Immersed Tube Tunnels are composed of prefabricated sections placed in trenches that have been dredged in river or sea bottoms. The sections are usually constructed at some distance from the tunnel location and made watertight with temporary bulkheads. They are then floated into position over the trench, lowered into place, and joined together underwater. The temporary bulkheads are removed, and the trench is backfilled with earth to protect the Tubes. Immersed Tubeshave been widely used for highway and rail crossings of soft-bottomed, shallow estuaries and tidal rivers or canals in which trenches may be excavated with floating equipment.
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Immersed steel Tube Tunnels an american experience
Tunnelling and Underground Space Technology, 1995Co-Authors: Ahmet GursoyAbstract:Abstract The idea of immersing a prefabricated Tube tunnel was first put into practice in the United States in 1896, for a water oine crossing Boston Harbor. Over the past century, Immersed Tube technology has continued to evolve in the U.S. After introducing and discussing advantages and disadvantages of Immersed Tube Tunnels, the paper describes the development of basic advances in the design and construction of Immersed Tube Tunnels within the last 60 years in the United States. Design and construction features of selected major projects also are described.
Ssc Liao - One of the best experts on this subject based on the ideXlab platform.
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seismic design issues for Immersed Tube Tunnels in preparing for construction in the 21st century proceedings of construction congress 91 sponsored by the american society of civil engineers in cooperation with the american institute of mining engine
1991Co-Authors: Ssc LiaoAbstract:This paper provides an overview of the issues and the state of the art techniques in the seismic design of Immersed Tube Tunnels (ITT). Particular focus is given to the ITT presently planned for construction in Boston Harbor, as part of the Central Artery/Tunnel (I93/I90) Project (CA/T).
V Tirolo - One of the best experts on this subject based on the ideXlab platform.
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INTRODUCTION TO Immersed Tube TUNNELING SYMPOSIUM. IN: PREPARING FOR CONSTRUCTION IN THE 21ST CENTURY, PROCEEDINGS OF CONSTRUCTION CONGRESS '91, SPONSORED BY THE AMERICAN SOCIETY OF CIVIL ENGINEERS IN COOPERATION WITH THE AMERICAN INSTITUTE OF MINING
1991Co-Authors: V TiroloAbstract:The papers in this section of the conference focus on the design and construction of Immersed Tube Tunnels for Boston's Central Artery Project. The Third Harbor Tunnel will be a steel shell Tube Immersed Tube tunnel located under Boston Harbor between East and South Boston. The Fort Point Channel will be a concrete Tube tunnel. Lastly, the authors discuss innovative possibilities for future Immersed Tube Tunnels. Innovations inclue tethered "floating" Tubes. These techniques will not only result in the possibility of constructing Tunnels in extremely deep water, but will also minimize the disposal of excavated materials which, as discussed above, has been a major issue in recent Immersed Tube Tunnels.
Vincent Tirolo - One of the best experts on this subject based on the ideXlab platform.
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Introduction to Immersed Tube Tunneling Symposium
1991Co-Authors: Vincent TiroloAbstract:Today's Symposium on Immersed Tube Tunneling is a continuation of a series of papers that began at Construction Congress '89 with discussion of mined tunnel subaqueous Tunnels. At CC'89, four contractor's discussed their approach to preparing a mock competitive bid for a subaqueous rock tunnel constructed by either drill and blast or TBM and a subaqueous soft ground tunnel constructed using either compressed air or a earth pressure balance shield. Because of time restrictions, an alternative method of tunnel construction not considered at that time was an Immersed Tube tunneling. Immersed Tube tunneling will be the subject of today's symposium. Immersed Tube Tunnels have been successfully utilized for subaqueous river crossing since they were first employed in the early 1900's during construction of a mass transit railroad tunnel across the Harlem River in New York City and a commercial rail tunnel crossing the Detroit River between the United States and Canada. Since these initial efforts, many of Immersed Tube Tunnels have been constructed around the world in the last eighty years. The most well known Tunnels include the Fort McHenry l-95 tunnel in Baltimore, MD; the numerous Immersed Tube Tunnels under in Hampton Roads and the Elizabeth River in Virginia; the Immersed Tube Tunnels of the Bay Area Rapid Transit Authority in San Francisco Bay; and the 63th Street Tunnel under the East River in New York City.
Dongdi Wang - One of the best experts on this subject based on the ideXlab platform.
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study of the influencing factors of compressive characteristics for the foundation layer of undersea Immersed Tube Tunnels
2014Co-Authors: Jianjian Xing, Zefei Yang, Dongdi WangAbstract:Shenjiamen undersea Immersed Tube tunnel in Zhoushan, Zhejiang was taken as prototype to establish a 1:10 scale model with 30m in vertical length. The formation process of sand grouted foundation layer in seawater environment was simulated in the experiment considering the interaction of gravels during the formation of foundation layer. Different construction factors were examined by incorporating different design boundary condition, back-silting condition and sand grout density. Results showed that in the boundary condition of one end fixed and the other free, the settlement at the free end of the Tube increased significantly (approx. 3 times) and the timeframe for settlement to stable increased; back-silting increased the overall condensability of the foundation layer and leaded to non-uniform compression; the reduction of sand-water ratio of the grout reduce the compressive modulus of the foundation layer. Further settlement occurred when the load exceeded the limit which is detrimental towards the global stability of the foundation layer. Comparing the effects on the settlement of foundation layer or compressive modulus, the factor of one end fixed and one end free was most significant, followed by back-silting and reduced sand-water ratio.
