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World Tunnelling Congress
WTCThere are 1984 documents.
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Innovations in the Use of Fibre Reinforced Precast Segmental Tunnel Linings in Klang Valley Mass Rapid Transit Project
Abstract: Fibre reinforced concrete (FRC) has been used in Malaysia underground projects since the 1980’s. The majority of FRC applications in underground projects in Malaysia has largely been in sprayed concrete for tunnel linings. FRC in sprayed concrete can be found in many hydropower, hydraulic and road tunnel projects in Malaysia. In 2011, FRC was finally adopted following design recommendations in...
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Nozzleman Qualifications - An Increased Focus on Concrete Spraying Performance
Abstract: During the last 10 years the tunneling and mining industries have had greater focus on the quality, costs and above all the safety around concrete spraying works. In 2009 the international industry group EFNARC established the Nozzlemen Certification Scheme – a certification that was intended to fill the qualification and accreditation gap existing for sprayed concrete operators, so called...
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Rock Reinforcement Mechanisms in Horizontally Layered Jointed Rock: Reinforced Rock Unit, Beam Building and Suspension
Abstract: This paper aims to highlight the role of geological structure in rock support design for tunnelling. In particular, the rock reinforcement mechanisms of sub-horizontally layered rock were studied using the distinct element method. Different rock reinforcement mechanisms manifested depending on the bedding thickness. For thicker beddings, it was found that the axial forces in the rock bolts...
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Local-stiffness-modified Beam Spring Model Simulation on Column-free Quasi-Rectangular Segmental Tunnel Lining
Abstract: The beam spring model (BS model) has better simulation results on the shield tunnel structure than the equivalent stiffness homogenization ring model (ESHR model). For the structure with longitudinal joints governed by large bending moment, the BS model can partly simulate the deformation characteristics of the structure caused by the joints. However, the BS model still has certain limitations...
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The Three Rivers Protection and Overflow Reduction Tunnel (3RPORT) - Slurry TBM operation in difficult ground conditions
Abstract: The 3RPORT tunnel is part of the Long-Term Control Plan (LTCP) of the City of Fort Wayne (Indiana, USA) having the main goal to reduce the discharge of untreated Combined Sewer Overflows (CSOs) and improve water quality in Fort Wayne’s CSOimpacted streams. The tunnel will have a length of about 7.5 km, an internal diameter of 4.87 m, and is excavated by means of a slurry TBM. The tunnel is...
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The Pursuit of an Autonomous Tunnel Boring Machine
Abstract: The inexorable rise of autonomy in modern machines has disrupted many industries from transport to manufacturing, leading to a new revolution called Industry 4.0. Riding on this wave of technology, this paper presents the development of a technical innovation in the tunnelling industry called the Autonomous Tunnel Boring Machine (A-TBM). Sensor fusion is coupled with autonomous control...
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Construction Challenges of Urban Tunnelling in Klang Valley, West Malaysia: Case Study of 8th Drive in SSP Line
Abstract: Underground construction has been gaining wide attention in recent years to alleviate traffic congestions in urban areas. Twin bored tunnels using Earth Pressure Balance (EPB) shield launching from Bandar Malaysia North Station towards South Portal is the 8th drive of Klang Valley MRT Line 2. Geology along tunnel alignment comprises of KL Limestone Formation and Kenny Hill Formation. Different...
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Case study of jammed TBM in Rock Tunnels
Abstract: The use of TBM is always more widespread also due to the ever increasing versatility of these machines, no longer limited to the sole condition of rock sound but capable of facing even complex situations. Despite the technological progress it is possible to run into particularly unfavorable geological situations, which determine the TBM’s trap. This paper reviews the experience of releasing...
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An Integrated Framework to Optimize Site-Investigations for Tunneling Applications
Abstract: An evaluation of the heterogeneity and variability in the sub-surface conditions is an essential aspect in the planning, design, and construction of tunneling projects. The low density of sampling in tunneling projects and the practice of locating the boreholes based on the individual experience makes a comprehensive assessment of sub-surface conditions challenging. This paper presents a...
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Probabilistic Subsurface Modelling in Tunnelling Applications: Suggestions for Use in Practice
Abstract: Tunnel projects are often dominated by spatial uncertainty in geological-geotechnical conditions. In recent years, there has been an increasing interest in the use of geostatistical or random field methods for probabilistic subsurface modelling in tunnelling applications. These methods provide the means for modelling the spatial variability and quantifying the spatial uncertainty in...
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Tunnel Process Control for Klang Valley Metro Phase 2 Using Machine Learning and Artificial Intelligence
Abstract: The Klang Valley Mass Railway Transit in Kuala Lumpur is mid-way through line 2 construction. The line faces several challenges including mixed face conditions, variable ground water and geologic hazards with high potential for large settlements and sink holes. Consequently, the influences on tunnel processes such as advance rates and cutter tool wear are hard to estimate. This paper presents...
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The Brenner Base Tunnel, Selected Aspects of Tunnelling Works at the Austrian
Abstract: The Brenner Base Tunnel (BBT) runs for 64 km between Austria and Italy, making it the longest underground railway tunnel in the world. The BBT consists of two single track tubes, connecting cross passages every 333 m, an exploratory tunnel and three emergency stations. 109 km of more than 230 km of the entire project are already excavated. At the Austrian side the excavation works with drill...
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Selected Aspects and Comparison of Metro projects in Europe and Asia
Abstract: Amberg Engineering AG is currently or was involved in Metro projects in Europe and Asia. The paper will describe selected aspects of the design and the excavation works related to geotechnics, construction works as well as safety and ventilation issues from the different projects. The presentation itself will finally compare design, Risk and safety as well as construction issues in the...
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An Experimental Study on the Behavior of Precast Tunnel Segments Reinforced by Macro-Synthetic Fibers during...
Abstract: The use of fiber reinforced concrete in tunnel linings, with or without conventional rebars, has increased in the two last decades, especially in segmental linings. The design process of segmental concrete linings in ground conditions generally refers to temporary loading conditions (demolding, storage, transportation, grouting process and TBM thrust jack phase) as well as to the final...
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An Overview of TBM Tunnels in Hong Kong
Abstract: Mechanized tunnelling method is increasingly adopted in tunnel projects. The various Tunnel Boring Machine (TBM) types can be adopted for different ground conditions from hard rock, mixed ground to soft soils. The range of the TBM diameter starts from less than 1m to more than 17m, enabling its application in various public facilities in urban development, from power cable tunnel, water supply...
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Design and Construction of the Deepest North American Underground Station - Station Edouard Monpetit, Montreal, Canada
Abstract: With the increased need for public transportation in densely populated areas, new transit projects start including more and more interstations and tunnel rework. To facilitate mobility across the Greater Montreal Region (Canada), The Réseau Express Métropolitain (REM) includes a deep underground station which connects the deeply sitting reworked tracks to the University campus located above....
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