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World Tunnelling Congress
WTCThere are 1984 documents.
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TBM Cutting Performance in Hard and Abrasive Granite in Hong Kong
Abstract: Tunnel Boring Machine (TBM) tunnelling projects in hard and abrasive rock pose different challenges compared with those in soft ground. One of the challenges is the determination of penetration rate of tunnelling and the design of TBM cutter with respect to anticipated ground condition. There is little published information on slurry TBM performance in granitic rock. Two 7.45m dia. slurry TBMs...
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The Project Which Uses an Innovative Construction Method to Expand an Operating Subway Tunnel Built by the Caisson...
Abstract: This project involves renovating Minami-sunamachi station on the Tokyo Metro Tozai Line, by converting a single island platform with two tracks into two island platforms with three tracks to eliminate train delays and alleviate congestion during rush hours. Moreover, station facilities, escalator and elevator devices are also relocated to improve passenger flow. This Station was constructed by...
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Sydney Heads Rail Tunnel - A Treasure Trove of Planning Opportunities
Abstract: Sydney is a fast-growing city with a population of over 5 million. By 2066 this is expected to increase to 10 million people. Road congestion is a growing problem, particularly if measured by the ever-increasing travel times experienced by private and commercial vehicles. Given these concerns it is imperative that Sydney's rail network be expanded to both improve the rail network and enhance...
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Design considerations and construction of Paseo del Bajo corridor in Buenos Aires
Abstract: Cut and cover construction method is frequently used for underground structures in densely built-up urban areas for creating underground space for a new transport corridor, as in this case, or expanding urban infrastructure. Paseo del Bajo is a vehicle urban artery locates at Puerto Madero´s heart in the Buenos Aires City, Argentina. Its main corridor is limited to heavy duty vehicles (even...
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618 m Vertical Shaft Steel Lining of Uma Oya Project, Sri Lanka
Abstract: Uma Oya Multipurpose Development Project is a hydropower project comprises of two RCC Dams which their reservoirs are connected by a Link tunnel. The water will transfer from first dam reservoir to the other and then it will transferred through a 15.4 km headrace tunnel to the top of a 618 m deep vertical pressure shaft. This shaft provides high pressure water with its suitable head for an...
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A 3D EPB numerical excavation sequence
Abstract: Urban tunnelling can be a highly challenging process, especially where ground settlement is not tolerated well, and limited environmental disturbance is required. Controlled mechanised tunnelling is usually preferred in such ground environments, specifically Slurry or EPBM, depending on the ground properties. Although analysis of tunnelling is a three-dimensional (3D) problem, conventional...
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A Clean Solution for Renewable Energy Small Diameter Hydro Tunneling
Abstract: Small hydroelectric power projects, with installed capacity up to 10 MW, are a relatively untapped but potentially gamechanging source of renewable energy worldwide. In Norway, hydro projects are pioneering the use of small diameter TBMs in hard rock. Compared with drill and blast, TBMs offer increased production rates and reduction in cross section, as well as lowered rock support requirements...
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A combined initial support system of high in -situ stress and soft rock tunnel
Abstract: After excavation, the surrounding rock of the high in-situ stress and soft rock tunnel will produce large deformation, resulting in the yield, crack, and even collapse of the initial support. This study was guided by the flexible support concept based on the energy principle, proposed a combined initial support system suitable for high in-situ stress and soft rock tunnel. The combined initial...
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A comparative study of the biomechanical load s during installationof rock bolts in tunnels
Abstract: Installation of rock bolts is a common technique to support the rock mass in tunnels and caverns. The bolting is usually performed with fully grouted conventional steel rebars. The weight of the steel in combination with a manual installation may imply a risk from a working environment perspective. Glass fiber-reinforced polymer (GFPR) bolts have a lower weight and could therefore be beneficial...
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A developmentfocused on reducing fuel consumption and emissionsthe contributes
Abstract: The article describes the development of technologies applied on concrete machinery for underground jobs, aimed at reducing consumptions and emissions. The focus is on hybrid solutions and overall efficiency of the machines taking stock of the status of the art and the evolution trend of technology, from the point of view of a concrete machinery constructor. It shows the dynamic development of...
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A Digital Twin for the Fehmarnbelt Tunnel
Abstract: The Fehmarnbelt Tunnel will have its Digital Twin (DT) facilitating more effective and efficient asset management of the tunnel during its long lifecycle. The DT will accommodate and interlink the BIM and GIS, Femern Asset Maintenance and Management System (FAMMS), SCADA system and Structural Health Monitoring System. The DT should, therefore, deal with scalability, flexibility and modularity...
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A Finnish method for draining in drill and blast tunnelling
Abstract: Drainage of rock tunnel surfaces has shown to have a significant impact on project cost, time and on tunnel quality. Requirements might be set high and work can be extensive. According to research notes a threefold structure of pre-grout, rock drains and shotcrete is required to get dry conditions in the tunnel spaces. Thus, the objective is to drain the dripping or leaking water or even...
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A handbook for sustainable and fire safe tunnelling work
Abstract: In Sweden, several tunnelling projects are underway. In several of these, shortcomings regarding fire protection during the construction phase have been identified. The basis is that Swedish law applies, where fire protection is regulated in several legislations and regulations. Despite this, both owners and contractors may experience uncertainty about what is a reasonable level of preventive...
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A new drilling pattern of contour blastholes for overbreak control
Abstract: The problems of overbreak and underbreak exist widely in drilling and blasting tunnels. The traditional contour blastholes (TCB) pattern has disadvantages in controlling overbreak and underbreak due to the impact of the initial support. For example, it generally increases the look-out angle and causes the overbreak. However, its effect is rarely mentioned in previously published studies. Based...
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A new expert model to evaluate maximum settlement - Case study Niayesh tunnel
Abstract: Tunnelling excavation might lead to surface structural damages due to settlement occurrence. Therefore, maximum settlement must be evaluated as accurate as possible before tunnelling excavation. In this investigation, an Expert Settlement Evaluation Model (ESEM) has been developed by using Case-Based Reasoning (CBR) method to evaluate maximum settlement occurred by tunnelling activities. This...
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A non-conventional system of recovering the TBM
Abstract: Sometimes the retrieval mode of the TBM after finishing the drive cannot be the typical vertical shaft extraction; the boundary conditions of the project (schedule, overlapping of activities and/or lack of space among others) may require a different solution. The case presented describes the solution adopted in a metro project where the TBM shield is left buried and forms part of the tunnel...
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