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World Tunnelling Congress
WTCThere are 1984 documents.
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BIM Application Case for Shallow Subway Tunnel Construction
Abstract: Improving productivity through the adoption and development of a new IT technology is becoming a new paradigm in the construction industry. In infrastructure projects, cost reduction through Value Engineering (VE) is becoming the major concern of construction projects. As a result, civil Building Information Modelling (BIM) is being adopted. The application of civil BIM is usually considered as...
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Flexural Performance Evaluation of Macro PET Fiber Reinforced Tunnel Shotcrete
Abstract: Since the introduction of the drill and blast method for tunnel construction, shotcrete has been used to stabilize excavated tunnel surfaces by controlling the initial displacement of the tunnel walls and preventing weathering. Recently, much attention has also been paid to the role of shotcrete in terms of long-term use of tunnel structure and safety(Yoon et al. 2013). Fiber reinforced...
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NATM – Metro Tunnel Below Elevated Metro Line
Abstract: Delhi Metro Rail Corporation (DMRC) in 2002 started its first phase of metro link of multiple phase metro network in Delhi. After successful completion of first two phase of metro network DMRC in 2012 - 2013 started third phase of its expansion. Metro network in Delhi is a combination of underground and elevated corridors. In the third phase, DMRC has taken up the task to construct metro...
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Guiding and monitoring the Eurasia Tunnel construction under the Bosporus Strait
Abstract: The inauguration of the Marmaray Tunnel in October 2013 realised the first phase of the Turkish dream: to achieve a subterranean connection between Europe and Asia. This tunnel has been constructed as a part of the public railway transportation network of the City of Istanbul. The second phase of the Bosporus crossing will be finished on completion of the Eurasian Tunnel for road traffic, to be...
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The resistance of underground facilities on seismic loading
Abstract: In the past showed, that underground facilities are considered as less susceptible on seismic loading or on earthquakes, especially if we compare them with the construction facilities at the surface, but the associated risk may be high, since even a low level of damage may affect the serviceability of a wide network [1]. Because of the geometrical and material complexity of the soil-structures...
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Analysis of TBM Advancement Data Of The Frejus Tunnel Safety Gallery
Abstract: The Frejus Tunnel is part of the international highway between Italy and France. The tunnel links the two cities of Bardonecchia (Italy) and Modane (France). The total length is 12.89 m with a maximum overburden of 1.750 m. It is one of the main trans-Alpine transport routes across the France-Italian border, serving almost the 80% of the commercial traffic between the two Nations. From April...
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Tunnel Designed with Early Ring Closure in Squeezing Ground
Abstract: The Hachinoshiri tunnel is a two-lane road tunnel the total length of which is 2469m. The inner section of the tunnel is designed to be 71m, for which the tunnel needs to be excavated with a cross section of 115m. Highly weathered squeezing mudstone, the unconfined compression strength, q, of which measures not greater than 0.25N/mm, is present over approximately 570m in the major direction of...
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Settlement Analysis and Monitoring Instrumentation of Delhi Metro’s operational Line-2 tunnels during TBM, of new...
Abstract: Delhi Metro Line-8/Phase-3 TBM tunnels underpass the operating underground Metro Line-2 (near existing Hauz Khas station) with low cover. Since the existing tunnels of Line-2 will be under operation during the construction of the new Line-8, scientific design was carried out in order to determine the critical factors that govern the interaction of the two twin bore tunnels (existing and under...
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Assessment and Preservation of Immersion Joints
Abstract: Within the scope of the 2nd Coen Immersed tunnel project, the refurbishment of the almost 50 years old 1st Coentunnel was comprised. As two immersion joints showed leakage problems, an analysis was made to detect the causes that led to these leakages and the appropriate mitigating measures that should be implied. This analysis resulted in the decision to ‘only’ take care of the evacuation of...
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Vezia - Crespera Cable Tunnel
Abstract: As part of the complementary works for the Gotthard Tunnel’s track, inside theproject, also known as the New Railway Link through the Alps, in order to provide electricity to the new railway Ceneri base Tunnel, close to the southern portal of a densely urbanized area located near the city of Lugano, named Vezia, it was decided to build a new tunnel where other overhead facility lines in the...
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A Computer Vision System for Tunnel Inspection
Abstract: Tunnels for transportation, either for rail routes or automotive traffic, are demanding constructions with challenging requirements for inspection and maintenance. The length of the tunnels world-wide is quickly increasing and, furthermore, in many countries their age requires frequent inspection and maintenance; these facts dictates an urgent need to specify an effective procedure for...
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Environmentally low impact blasting in urban residential area
Abstract: To reduce the load caused by tunnel blasting on environment, including psychological effects on residents, it is quite effective to reduce the blast vibration and duration of blasting time. At Anei River tunnel project, as the tunnel goes right under the residential area and it goes through stratum of hard granite, it was necessary to carry out blasting excavation, then blasting with low...
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Monitoring TBM Thrust Load Propagation along Segmental Concrete Tunnel Lining Using Distributed Optical Fibre Strain...
Abstract: 1.1Problem This paper discusses the monitoring of National Grid Power Tunnel’s new segmental concrete tun-nel linings using embedded distributed optical fibre strain sensing. Fibre optic cables were installed within 36 segments during manufacture in order to monitor strain following installation of the segments into the ground. The objective of this paper is to discuss how embedded fibre optic...
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Use of thermography for tunnel-inspection
Abstract: Today, machine vision, especially laser scanning, is already widely used for the inspection of tunnels. Thermal imaging provides additional, valuable information for determining the structural condition of tunnels. This paper covers an approach for integration of thermography into a laser scanning system. It presents key aspects of a scanner system with integrated thermal imaging: The scan...
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A study on the security effect of the construction of new subway station on parallel subway station structure
Abstract: With the underground spaces development, there are increasing numbers of deep foundation pit engineering problems emerged in the process of the urban construction. Especially in some coastal economically developed city, deep foundation pit in soft soil area has become a high risky project. Many scholars have carried out some researches on the effect of foundation fit excavation on existing...
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Backfill grouting with two-component grout - Case study Tehran metro line 7 east-west lot
Abstract: In Tehran metro line 7 east-west lot an EPB-TBM has been chosen to perform the excavation of the tunnel. In this project, excavating diameter is 9.14 meters and outer diameter of segments (with 35 cm width) is 8.85 meters, with considering to placement of segments, the width of annular gap (tail void) is 29 cm that should be filled with grout. Based on the hydrology studies, 65 percent of...
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