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World Tunnelling Congress
WTCThere are 1984 documents.
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Structural outlines of the static and geostatic restoration proposed for two railways tunnels in a state of serious...
Abstract: The tunnel of Catajo, geographically situated between the Padua-Bologna railway line and the eastern fringe of the Euganei hills, was in a state of serious damage originating in malformation of the cladding, manifesting in conspicuous convergences on a section of about 40 m of the barrel facing eastwards. The Catajo tunnel, thus called for its closeness to the famous landmark of the area that...
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The adoption of the SENS in an urban railway tunnel
Abstract: The Nishiya Tunnel on the Sotetsu - JR Through Line is the first project to be executed in an urban area with the “extruded concrete lining system with shield” (hereafter SENS). This is the third case that the SENS has been used; previously, it had been used to construct the Sanbongihara Tunnel on the Tohoku Shinkansen (bullet train) Line and the Tsugaru-Yomogita Tunnel on the Hokkaido...
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Lining and Tunneling Design Method in Coal Measure Strata at Panxing Expressway
Abstract: With the propulsion of China West Development Project, The infrastructure facilities, such as expressway, railway, hydropower, are developing rapidly. Owing to the mountainous topographical features and complex geological structure, some hazards, such as landslide, mud bust, water inflow, gas outburst and other hazards, threat the safety of constructors, increase the construction cost, and...
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Behavior of the fragmental rocks during the tunnel excavation
Abstract: When a tunnel is excavated, the ground around a tunnel deforms locally and the deformation shape can be influenced by the ground characteristics, the tunnel size and the excavating order. In general, when the bench cut or full face cutting is used by tunnelling, the uniform deformation shape would be occurred above a tunnel crown. Terzaghi(1954) demonstrated that the ground arching (Murayama...
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Average Material Properties of Composite Ground
Abstract: This study discusses the average Young’s modulus arising out of the inhomogeneity and the influ-ence of the arrangements of composite materials in the ground. Numerical analysis of tunnel ex-cavation in inhomogeneous ground which distributed two material properties were carried out. In this study, the ground is composed of two types of Young’s modulus. In addition, the each volume rate of...
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Marsh Funnel testing for rheology analysis of bentonite slurries for Slurry Shields
Abstract: For the face support during slurry shield tunnelling, the rheology of the bentonite suspension has to meet strict requirements. Determination of the rheological properties follows the international standards API 13B [1] and DIN 4126 [2]. On the construction site, simple and robust measurement methods are required for quality control of the suspension parameters during the tunnelling process....
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Crack Detection in Pillar Structure Using Infrared Thermo-graphic Imaging
Abstract: The use of underground space in metropolitan city is increasing. More than 90% of flood damage occurs in the downtown area of metropolitan cities. To prevent and/or minimize flood-induced damage, an underground rainwater detention cavern, to be built underneath existing structures, was proposed by Seo et al. (2012a). As for underground caverns to be built for flood control, multi-caverns will...
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Storage Tunnel and Pump Station in Hartford, Connecticut
Abstract: The South Hartford Conveyance and Storage Tunnel (SHCST) is a major component of the Hartford Metropolitan District’s Clean Water Project (CWP). This tunnel is intended to capture and store Combined Sewer Overflows (CSO) from the southern portion of Hartford, CT and Sanitary Sewer Overflows (SSO) from West Hartford and Newington, CT. The project is estimated to cost approximately $500 MM and...
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Experimental investigation on effect of ambient pressure of conditioned soil on tool wear in earth pressure balance...
Abstract: The use of mechanized excavation especially shielded tunnel boring machines (TBMs), has grown rapidly in various soft ground tunneling projects. One of the advantages of mechanized tunneling compared to conventional method is the ability of the machines in coping with various geological conditions. In the recent years, Earth Pressure Balance (EPB) shields have been successfully used in many...
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Simulation-based TBM performance prediction
Abstract: Fast growing urban areas put high requirements on the existing infrastructure systems. Due to limited surface space in this high populated areas the demand for underground projects increased continiousily in the last few decades. Frequently, finished projects do not reach the highest possi-ble production performance. Reasons for this are complex and can often not be identified clearly. The...
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The ground Full relaxation and displacements by phased excavation order
Abstract: Model tests were conducted to examine the load transfer and the aching effects on the behavior of the ground around the tunnel due to the phased excavation order at the tunnel face. Tests were conducted in the trapdoor tests apparatus developed by Terzaghi(1946) for 16 cases with different overburdens, which were 0.5D, 1.0D, 1.5D, 2.0D respectively by changing aspects of differential...
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Design and construction of The San José Hydroelectric Project (Cochabamba, Bolivia)
Abstract: The San José Hydropower Project (Cochabamba department, Bolivia) owned by ENDE Corporation and managed by the Public Agency CORANI comprises 2 power stations (San José 1 and San José 2) with a total capacity of 55 + 69 MW. The project is now under construction phase and includes 3 supply tunnels and 2 headrace tunnels with a total length of 15.7 km that shall be bored by NATM concept. To speed...
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Load-bearing capacity of the grouted bolt set on a physical model
Abstract: Relation between pull-out force on and displacement at a bolt head is a dependency that describes a serviceability of ground bolt displaying the bolt’s bearing capacity in ground condition. This dependency is determined by a pull out test being commonly conducted in In situ ground condition. The measured bolt head displacement combines at least three sorts of deformations such as those on head...
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Face Stability of Crossing River Shield Tunnel under Geological Conditions of Soft and Hard uneven Strata
Abstract: It is an important issue to maintain the face stability during construction of river-crossing shield tunnel. With the increasing of excavation diameter of river-crossing shield tunnels, excavation face will penetrate through heterogeneous soil strata, and it is relatively difficult to maintain the face stability under geological conditions of uneven soft-hard strata. Nowadays, most of current...
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Intelligent Lighting Control for Energy and Maintenance Savings
Abstract: Maintenance of equipment is expensive. The cost of equipment and manpower as well as the indirect costs associated with tunnel and lane closings are all important expenses that are, more often than not, difficult to precisely evaluate. Equipment life cycle is crucial in minimizing the number of interventions in tunnel—and improving operators’ bottom lines. Over the past decades, the use of...
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Simulation and analysis on fire scenario for subway station
Abstract: With the development of urban underground space, fire prevention and fire resistance design for underground constructions is getting widespread attention. Subway stations are a great part of underground constructions for which the fire resistance design has already been paid attention to. While exposed to a fire, the station structures, the components inside the platform layer, the station hall...
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