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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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The Structure of the Rock Mass of the Submarine Tunnel and the Grouting of the Top Water Block the Water
Abstract: One of the distinctive features of the subsea tunnel is the unlimited water supply. Groundwater seepage caused by subsea tunnel excavation brings two problems: one is the determination of water load of structure, the other is the prediction of water inflow. The complex geological structure of the gulf or strait has great influence on the groundwater seepage in the tunnel. Taking the NO.1 line...
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Numerical Simulation Analysis on Piston Effect Induced by a Running Train in Subway Station
Abstract: Effective utilization of the piston wind induced by metro trains is a meaningful research point. A numerical methodology to simulate a train entering and leaving the subway station by using dynamic grid technique was proposed. The longitudinal distribution of piston wind in the tunnel space inside the station, the variation for the piston wind volume with train’s running states and the...
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Pregrouting Executed from a Double Shield TBM in the Follo Line Project (Oslo)
Abstract: The Follo Line project is a unique complex project in Norway and Europe. It is the largest TBM project in Norway and will become the longest rail tunnel in the Nordic countries. With four TBMs starting from the same location, Acciona Ghella JV is jointly responsible for drilling 36 km of tunnels between the cities of Oslo and Ski. Due to encounter ground conditions, it was required the...
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Sustainable and Strategic Use of Underground Space - Ashram Underground Metro Station
Abstract: Initially a major portion of Ashram underground Metro Station including ancillary building was planned at a private land, but due to non-acquisition of private land because of litigation, Ashram station was redesigned by reducing the typical 265 meter length of station within an available land of 151 meters. Redesigning 265 meters length of original station box in a length of only 151 meter was...
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A Study on Optimization of Re-construction of Inverted-arch While Keeping Traffic Lane Based on Actual Test in...
Abstract: In Japan, there are some cases of re-construction of inverted-arch because heaving has been continuing after the passing of many years and the secure of road user is lost. In these cases, it isn’t permitted to block road and one traffic lane must be kept. Therefore, factors of inefficiency are earth-retaining wall for securing one traffic lane and conversion of water drainage. So we introduce...
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The Use of Satellite Technology on Sydney Metro Northwest Tunnel Construction
Abstract: The recently opened Sydney Metro North West Line includes 15km of twin running tunnels that were constructed in rock using four double shield TBMs. The selected route, with an open cut station at Cherrybrook, passes through a designated landslip zone along a steep sided ridge line. The station is in the middle of the landslip zone, with shallow tunnels either side required in order to avoid a...
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The Schedule of Baselines: A BoQ for Measurement of Time under the Emerald Book
Abstract: The new FIDIC-ITA Form of Contract for Underground Works (the Emerald Book) is based upon a balanced allocation of ground related risks to each party. It includes a provision for measuring the time available to the Contractor for Excavation and Lining, based upon the conditions of the ground mass and upon its reaction to the excavation and support. The instrument for comparing the time...
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Experimental Trial of Three-Dimensional Location Detection of Workers Using the Safeguarding Supportive System (SSS)...
Abstract: The number of industrial accidents at tunnel construction sites in Japan has been gradually decreased because of development of construction technology and/or promotion of machinery construction. However, when accident occurs once, degree of severity is big. Work circumstances of tunnel worker remains unstable because safety at a lot of tunnel work-sites are still dependent on workers...
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Detection of Dangerous Points and Behavioral Modification from Environmental Change by Behavior Analysis Procedure...
Abstract: Accidents at tunnel construction sites in Japan rapidly decreased because of development of construction technology and/or promotion of machinery construction. However, the tunnel accident elicits fatal result if once accident occurs because safety at many tunnel work-sites in Japan are still dependent on workers attentiveness. It might be important to analyze behavioral pattern of workers and...
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Impact Assessment of Tunnelling on Adjacent Flyover Pile Foundation in Mumbai Metro Project
Abstract: The purpose of this study is to analyse the impact of bored tunnels on nearby flyover pile foundation and rock formation. The study covers the series of developments of tunnel excavation close to existing pile foundation. Impacts of excavation on the existing structures are studied using suitable standard software. Model outputs will be cross verified in the field and then validated. For...
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Challenges in Construction of Underground Metro Station Adjacent to Flyover with Top down and Partial Bottom up...
Abstract: Underground tunneling in urban areas poses several challenges and the risk multiplies in densely populated metro cities. The Mukundpur-Yamuna Vihar Corridor under Delhi MRTS Project of Phase-III involves construction of many underground stations, among which one of the station is Vinobapuri station whose box comprises of dimensions (243 m (L), 24.73 m (Clear Width) and (17.65 m depth of rail...
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Construction of Subway in Cohesionless Soil by Method of Box Pushing Technique: A Case Study of Bhikaji Cama Place...
Abstract: EMPTY ABSTRACT Construction of Subway in Cohesionless Soil by Method of Box Pushing Technique: A Case Study of Bhikaji Cama Place Metro (BKCP) Station of DMRC
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Waterproofing Sprayed Concrete Linings - Existing Methods and Potential Developments
Abstract: Sprayed concrete tunnel linings are a popular solution to the increasing need for fast and efficient transport systems in urban environment worldwide. Achieving an acceptable level of watertightness in sprayed concrete linings with a view to increasing the speed of construction, reducing costs and improving the carbon footprint remains a significant challenge for the construction industry....
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Assessment of Tunnelling Rock Spoils from Highly Weathered Lithology Using Rolling Friction Contact Models in...
Abstract: The assessment of jacking forces in highly weathered lithologies (or ‘soft rocks’) typically presents challenges relating to the measure of salient mechanical parameters of such lithologies, particularly the strength and deformation properties. This is mainly due to challenges in extracting intact rock cores for conventional laboratory-based rock tests, such as uniaxial compressive strength...
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Sidewall Reinforcement of Extremely Large Cross-sectional Tailrace Tunnel Passing Through a Fractured Zone
Abstract: In Amagase Dam redevelopment project, the stilling basin of tunnel-type outlet facilities is an extremely large cross-sectional tunnel (maximum drilling cross-sectional area: approx. 650 m2, maximum inner section finish area: approx. 500 m2) for dissipating the discharged water from the main gate before it flows into the Uji River. The target geology is mostly hard sandstone, but a large...
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Performance Analysis of a Tunnel Supported with Ribs Reinforced Shotcrete
Abstract: Is of great interest in the implementation of constructive supports for tunnels, the execution time, cost and structural performance -considering the quality of the intervened rock mass-. The use of Ribs Reinforced Shotcrete or RRS, defined within the classification system of the rock mass Q, is an option that can meet these three requirements. This article presents the design of a tunnel...
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