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World Tunnelling Congress
WTCThere are 1984 documents.
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Invert Construction of an Expressway Tunnel in Service with Significant Heaving of Road Bed
Abstract: In recent years, cases have been reported in which road beds in in-service tunnels have heaved, necessitating suspension of expressway traffic. In Toyasan tunnel, which is a two-lane roadway 2600 m long from Aizubange to Nishi-Aizu along the Banetsu expressway, heaving of the road bed was found along a 126-m section two years after it was opened for traffic.Though the section where the road bed...
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Interaction phenomena between tubes of different ages
Abstract: In this paper the design for the construction of a new tube of an existent road tunnel in Tuscany, Italy, is explained as a case study about the interaction phenomena between the tubes.The construction problems and the effectiveness of the adopted solutions, analyzed through a finite element method (FEM) analysis, are showed. Interaction Phenomena, Existing Tube, Excavation.From the Geological...
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Interaction Between Three-Arch Tunnel Construction and Pile Supported Bridge
Abstract: The present study presents the results of laboratory model tests to check the effect of 2-Arch tunnel construction on a pile supported bridge. A series of reduced scale model tests were carried out in the laboratory using a model reduced from a prototype tunnel case. The main focus of the test is to identify fundamental governing interaction mechanism of between the 2-Arch tunnel and the...
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Intelligent Sensing of Shield Tunneling Information in Real-Time via Mobile Application
Abstract: With the rapid development of urbanization in China, a large amount of metro constructions have been carried out in recent years. Dozens of shield TBMs driving simultaneously in the downtown area has raised up challenges for more efficient construction management. The lack of timely information communication and cooperation between all the participants involved in the project, especially the...
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Innovative solution for the excavation of the tunnels of the Line C of the underground of Rome, adjacent to the...
Abstract: Section T3 (Colosseo - San Giovanni) of the Line C of the underground of Rome, currently under construction, extends across the city’s historical centre and very near (sometimes underground crossing) monuments dating back to the age of the ancient Romans.For this reason, to reduce settlement, extremely effective innovative technical solutions were devised; this paper illustrates the solution...
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Innovative Geopolymer Coating for Road Tunnels
Abstract: Having a key role in the today’s transportation network, tunnels are an essential part of the infrastructure and affect the development of regional economies. Concrete linings in the tunnels also have a key role for ensuring structural safety and security which is essential for driving safety. These linings do not only structurally support the tunnel itself but also create an isolated and safe...
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Influence of system parameters on thermal performance of energy slab installed in underground structures
Abstract: The energy slab is a ground coupled heat exchanger equipped in building slab structures, which has a similar layout to the horizontal ground heat exchanger (GHEX). As the energy slab is generally installed at the shallow depth, its thermal performance is notably inferior to the conventional vertical GHEXs. This is because the energy slab cannot use the high thermal capacity of a deep...
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Influence of Soil Conditioning on the Flow Behaviour of EPB Face Support Medium
Abstract: The flow behaviour of the face supporting medium in Earth-Pressure-Balance (EPB) tunnelling is a decisive criterion for an efficient tunnel advance. The support medium needs to exhibit rather fluid properties in the excavation chamber in order to establish a quasi-hydrostatic support pressure distribution, while in the screw conveyor and on the conveyor belt a rather stiff consistency is...
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Influence of shield tunnel excavation with a large cross-section on high-proximity paral lel shield tunnel
Abstract: In the Yamatogawa Route in the urban area of Kansai, Japan, parallel shield tunnels with a large cross-section are constructed very closely over a long distance. To solve the technical problems involved in this project, we designed the tunnels using an original method that independently defined the design evaluation of the influence of the shield tunnel excavation on the neighboring tunnel. In...
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Influence of Material Models for the Effective Design of the Primary Lining
Abstract: Using of the finite element method issued a significant impact of static assessment of tunnel primary lining. Design can be effective and more realistic. For this calculation can be employed various behavioral models. The first question for geotechnical engineers, before modelling is find the proper numerical description of problem and then answer to link with a real situation.As a result of...
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Dewatering or Pre-grouting, That is question
Abstract: Clients and consultants generally don’t intend to consider Pre-injection method generally in detail design to decrease bid price and force contractors to propose lower prices. However, most projects will be over costed due to tunneling downtime and dewatering costs including electrical power, equipment, piping and human resources. This paper evaluates all costs in a hard rock TBM project where...
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Improve TBM productivity in converging and sticking geology, “Case study”
Abstract: Increasing urban population and the pace of industrial and other developments led to increase in water demand. Many of metropolitan and urban cities are facing acute shortage of water for domestic and industrial purposes To reduce the stress on water supply infrastructure, existing water sources are utilized to fullest and new sources are continuously added to augment the water supply. Major...
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Impact of slurry face support on the tribo logical system and the wear of excavation tools in soft ground tunneling
Abstract: Mechanized tunneling is vital to ensure necessary infrastructure development in urban area. The use of shield machines for soft ground has been established for many years. When budgeting such tunneling projects, precise planning and coordination in terms of tunneling technique choice (e.g. EPB or Slurry-shield), excavation strategy and tool wear prediction are required. Tool wear is usually...
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Hydraulic Jacking Analysis of Pressure Tunnels Using Coupled Hydromechanical Finite Element and Discrete Element...
Abstract: A series of analyses performed to assess potential hydraulic jacking in the concrete-lined section of a pressurized headrace tunnel immediately adjacent to a steel-lined tunnel section are discussed herein. The in situ stress reduction in the rock mass in the transition zone from steel to concrete liner can potentially cause hydraulic jacking. Hence, the performance of reinforced...
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Hydraulic Assessment of Tunnel- Designed for Diversion and Depletion
Abstract: Increasing urban population and the pace of industrial and other developments led to increase in water demand. Many of metropolitan and urban cities are facing acute shortage of water for domestic and industrial purposes To reduce the stress on water supply infrastructure, existing water sources are utilized to fullest and new sources are continuously added to augment the water supply. Major...
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Proceedings of the Transport and Immersion Operations of the N31 Aqueduct in Harlingen, The Netherlands
Abstract: The article describes the Scope of Work of Tunnel Engineering Consultants (TEC) for the N31 Aqueduct Harlingen project. The Works included all work preparations, immersion engineering, construction engineering and guidance for transport and immersion operations of the aqueduct, up to and including operational management of the transport, immersion, sand flow foundation and backfill operations...
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