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World Tunnelling Congress
WTCThere are 1984 documents.
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Management for material recovery in the context of SMP4 reconnaissance work
Abstract: The “exploratory works” activity of the Lyon-Turin cross-border section will end with the completion of the SMP4 works, allowing the start of the actual excavation of the Mont-Cenis Base Tunnel structures. In parallel to the excavation construction sites of the Base Tunnel, the operational construction site for the reuse of excavated materials will be a challenge, both from the point of view of...
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Managing Geological Complexity in BVC and PAC of Tehri PSP, India -A case study
Abstract: Tehri hydroelectric project is located on the left bank of River Bhagirathi in the state of Uttarakhand. Tehri Pumped Storage Project (PSP) comprising 4 Nos of reversible pump -turbine units of 250 MW each, involves construction of an underground Machine Hall, Upstream Surge Shaft with Chambers - 3 & 4, a Butterfly Valve Chamber (BVC), a Penstock Assembly Chamber (PAC), the Downstream Surge...
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Managing Knowledge for Future-proof Tunnels in the Netherlands
Abstract: Determining the scope of (structural) renovation of aging tunnels is a complicated task and modular renovation is becoming increasingly necessary. The COB Tunnel Programme aims at developing the knowledge necessary to renovate these tunnels in a modular fashion, to reduce hindrance as much as possible. Part of this program is the development of a Structural Health Analysis (SHA) for collecting...
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Measurement of geological joint faces from point clouds - application in tunnel
Abstract: 3D point clouds have recently become a tried-and-tested instrument of assessing geological joint faces. Especially in the case of only brief outcrops during tunnelling, they offer the opportunity to carry out in-depth analyses in a virtual environment without time pressure and risk. These include dip and strike of geotechnically relevant structures, their roughness, the direction of fault zones...
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Melamchi Water Supply Tunnel Phase 1 Design and Construction Challenges
Abstract: The Phase 1 Melamchi Water Supply Tunnel is a 26 km, 4 m size tunnel that comprises the main component of a new water supply project to provide 2.8 m3/s of treated raw water for the city of Kathmandu, Nepal under full flow pressure conditions of 26 m of maximum head. The inlet and outlet of the tunnel are located about 40 km and 20 km northeast of Kathmandu respectively. The inlet headworks for...
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Methodological Approach to Assess the Behavior of Andean Colombian Soils
Abstract: Colombia possesses a strategic geographical location for international trade. Underdeveloped road infrastructure has hindered taking advantage of this condition, and approximately over 80% of cargo is transported through old corridors. The country lies within the Andean Mountains, where South American, Nazca and Caribbean plates converge, generating a complex SE-NW fault system, as well as high...
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Metro Milano Line MM2 Piola-Lambrate - Ground stabilization with Hybrid
Abstract: Metro Milan line 2 was built in 1967 without considering waterproofing details. In late 90’s water table rose by many meters in a matter of a few years. Subsequently high rates of water inflow were observed in the tunnels. For instance, in 2015 the rate measured in the Lambrate-Piola Tunnels was up to 700m³/hour. Several attempts carried out with cementitious or resin injections were...
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Minimization of asbestos fiber dispersion from the tunnel muck using soil
Abstract: Within the context of “Radimero” TBM tunnels for "Terzo Valico dei Giovi" project, the high-speed rail between Genoa and Milan, geological formations containing Naturally Occurring Asbestos can be crossed. In these conditions, the limitation of dispersion of dust and, consequently, of fibres becomes very important for the TBM excavation process, especially during the transport of the excavated...
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Monitoring of a Himalayan Landslide to Understand Failure Mechanism and
Abstract: The project Udhampur Srinagar Baramulla Rail Link (USBRL) covers aprox. 300 km of railway in the lesser Himalaya, between Jammu, Srinagar and ahead. It crosses several mountain ridges with tens of tunnels and several stations. A paleo-landslide was activated after excavation works at the Sumber Station, near the town of Ramban. The paper presents the investigations and the monitoring leading to...
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Monolithic tunneling since 1988
Abstract: ABSTRACT: Independent on the location of a tunnel, country-side or submersed, watertightness is the main challenge for almost every tunnel. During the years solutions for tunnels have been developed in the construction and formwork business. It was always the goal to improve formwork systems and construction methods for higher quality of the tunnel, improvement of sustainability under...
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Multiple Use Applications of Super Water Absorber Polymer
Abstract: The application of Super Water Absorbents polymers (SWA) as chemical solutions in TBM tunneling is becoming increasingly demanding, due to their extensive multiple use and their relative facility in the application. The use of SWA polymers is extensively employed to enhance the performance of foams, further reduce the permeability of the soil, turn the loose material into a soil paste,...
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Mumbai Metro - Line 3 the execution strategy for delivering the Aqua line
Abstract: Mumbai Metro Line – 3, the Aqua Line, also known as Colaba–Bandra-SEEPZ line, is a part of the metro system presently under construction in Mumbai, India. When completed, the 33.5-km fully underground corridor will be the first underground metro line in Mumbai and will cater to 1.7 million passengers daily with a frequency of 3-4 minutes, ferrying 2500 passengers at a time. Line-3 is expected...
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New approaches in photogrammetric high -speed 3D tunnel monitoring
Abstract: In tunnel condition assessment, the trend is towards comprehensive 3D measurement combined with high quality image texture to document and quantify damages to the tunnel surface and to create a cohesive data base of the structural conditions throughout its lifespan. The faster such measurements can be made on-site, the less it impacts shut down times to the regular traffic. Also surveying costs...
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New Water Supply Project in Oslo, Norway
Abstract: ABSTRACT: Oslo, the capital of Norway, is one of the fastest growing cities in Europe. Today 90 % of the population in the city gets its drinking water from one reservoir and treatment facility. In order to increase the reliability and the robustness of the system, a new reserve water supply is under construction. The tunnel system is divided in three objects; a raw water tunnel, several...
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Numerical and Regression Analysis of Sub -Surface Settlements due to Tunnelling
Abstract: With trend of incrementally increasing urbanization, use of Rapid Mass Transit Systems using underground tunnels has exponentially increased and is further expected to surge with time. Due to urban locale of the construction of underground system, several structures are often found in close vicinity to it. With growing trend in underground urban infrastructure, it can be further envisaged that...
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Numerical simulation of the effect of cross passage excavation on surface settlement
Abstract: Soil behavior at the intersection of a main tunnel and a cross passage is a complex, three-dimensional problem and only threedimensional methods can provide a complete analysis of the stresses and displacements occurring in the environment surrounding the opening. The present study uses 3D numerical analysis to investigate the surface settlement and the extent of the plastic zone generated...
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