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Papers from WTC and ITA conferences have been made available as PDF documents.
ProceedingsThere are 1984 documents.
List of endorsed conferences
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WTC
World Tunnelling Congress
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SSS.infra approach to assess and mitigate the risks related to an extreme weather condition
Abstract: The increasing and worldwide diffusion of extreme weather events is responsible for disasters and severe losses every year, including damages to infrastructures. For this reason, weather- related hazards must be accurately considered during the risk assessment phase. This study presents the analysis of a complex hydrogeological and geomorphologic situation encountered along the new railway...
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Rondout West Branch Bypass Tunnel
Abstract: A single shield hard rock TBM is set to bore in New York State where it will encounter water inflows with high volume and pressures up to 20 bar. To overcome these difficult conditions, the TBM is designed to control 2500 gpm (9500 l/min) water inflows and seal against 30 bar (20 bar with a 1.5 safety factor). The TBM will bore a tunnel to replace part of the Delaware Aqueduct, which supplies...
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An Example for Wide Span Highway Tunnel, Akyazı Tunnel
Abstract: Trabzon City Pass Kanuni Boulevard project is approximately 23 km long and 9 tunnels will be opened in the scope of this project. The first tunnel to be opened is Akyazı tunnel. Left tube is located between Km: 0+764-3+180 (2416m long); right tube is located between Km: 0+764- 3+242 (2478 m long), and this tunnel is designed as twin tube having 3-lanes (Fig. 1). Project alignment enters the...
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Evaluation of applied SFRC as a steel replacement in the design stage in a part of Cairo Metro line No. 4
Abstract: Apart from development in machine technology and other cross sectional tunnel shapes, the alternative lining systems. It has carried out as well, in early sixties in the former Soviet Republic experiments were carried out with tunnel lining without any joints [1] after excavation; the soil was replaced by in site poured concrete lining. At the end of the seventies and beginning of the eighties...
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SEE Tunnel: Promoting Tunneling in SEE Region
Abstract: Swelling and squeezing rocks have different deformation mechanisms. However, significant deformations may occur in both rock types in tunnelling. Deciding the support system in swelling and squeezing rocks is one of the big challenging issues for rock engineers. Because there are many facts and problems has to be considered as/like the support type, the performance of the support, the support...
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Stability Assessment of the underground powerhouse cavern for the Sach Khas hydroelectric project in Himachal, India
Abstract: Stability assessment of an underground powerhouse cavern is a challenging issue, especially in the Himalayan region where rock mass is heavily influenced with active tectonic movement. This article is concerned with the stability assessment of a large underground opening inside the valley toe, where the rock cover varies between 45m (minimum) and 48m (maximum). The planned powerhouse cavern has...
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The creation of a large-scale underground concourse connecting a sky scraper complex and subway station ;...
Abstract: In the Tokyo Metro Hibiya Station, 4 subway lines converge at the crossroads of Tokyo's Ginza and Hibiya commercial districts, resulting in continuous congestion in the station from passengers making transfers and above ground with business people and tourists. As a part of a larger urban development plan, a new large-scale underground concourse has been planned to connect the subway station...
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Blominmäki – a large scale underground waste water treatment plant
Abstract: A new wastewater treatment plant will be excavated underground at Blominmäki in the city of Espoo, Finland. In addition to manage wastewater of 400,000 residents and making provision for improved wastewater treatment, the new plant will also release valuable seaside land for construction. Almost 1 Mm of rock will be excavated. In addition to tunnels and large halls, excavation includes 13...
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A successful case of water cut-off by ground freezing in the excavation of the shaft DST-1
Abstract: The construction of the shaft DST-1, 14 m diameter, 65 m deep of the Dugway Storage Tunnel Project (Cleveland), was completed following significant obstacles in the shaft excavation process. After applying different soil treatments (dewatering, jet grouting, permeation grouting) ground freezing was selected as a technically appropriate alternative. Since steel liner plates and ribs were...
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Mechanical behaviour of quasi-rectangular segmental tunnel lining
Abstract: The quasi-rectangular segmental tunnel lining is a new alternative for shield driven tunnels in urban railway transportation. It is firstly designed and employed in Metro Line 3 in Ningbo, China for its applicability in high density urban areas. The bearing capacity of this new structure is of great importance during its utilization period, as it is related to the safety reserve. In this study,...
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Design of Mined Cross Passages for Waterview Project Auckland (NZ): Comparison between Predicted vs Actual Performance
Abstract: The Waterview Connection is the NZ Transport Agency’s largest and most challenging road project to date. The world’s 10th largest Earth Pressure Balance Tunnel Boring Machine was used to construct the 2.4 km long twin tunnels of 13.1 m internal diameter. The tunnels are connected by sixteen mined cross passages, with an internal span of 5.2 m and 6.0 m height. This paper describes the lessons...
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Practical Considerations for Designing Rock Support for Tunnel Linings in Open Gripper TBMs
Abstract: Tunnelling can be said to unite theory and practice into its own construction art. With this in mind, it is impossible for designers of tunnel linings to disassociate themselves from the practical construction aspects of excavation and installation of support. This paper provides guidance for designers of rock support and linings for tunnels excavated with hard rock open gripper Tunnel Boring...
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Implementation of 3D-models as construction document for the building contracts
Abstract: The project Stockholm Bypass is located west of Stockholm city center to decrease the north-south road traffic through Stockholm and linking together and develop the external and regional cores. The bypass consists of more than 50 km of rock tunnels which will be constructed by using the method of drill and blast. As well of the means of this large scale and complex project and the overall...
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Stability analysis of blocks formed with determined joint network – a case study of assembly chambers with...
Abstract: This paper presents the challenges of designing two assembly chambers in the Follo Line Project, EPC TBM. The chambers are required for the assembly works of the four tunnel boring machines, two machines in each chamber. These caverns are situated in hard gneiss with a depth from ground surface around 100 m in the North and 65 m in the South. The features of the assembly chambers indicate a...
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Helsinki City Rail Loop – Töölö station
Abstract: The City Rail Loop is a significant railway development project planned below the Helsinki city centre, Southern Finland. The loop-shaped two-tunnel track railway line runs from Pasila and back via underground stations at Töölö, Helsinki city centre, Hakaniemi. The total length of the railway line is 8 km of which 6 km is underground. The service and rescue tunnel runs alongside the track...
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Modelling and Prediction of ground movements due to excavation of tunnels in sand
Abstract: The development of the surface settlement trough above a tunnel is well described by a Gaussian distribution curve for the case of a single tunnel in “greenfield” conditions. Based on this method, the volume of the surface settlement trough is simply assumed as equal to the amount of the ground loss in the region close to the tunnel. In this study, the volume of settlement troughs due to...
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