Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 15 of 15 for “"Earth Pressure Balance"”.
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Earth pressure balance (EPB) tunneling induced settlements in the Tren Urbano Project, Rio Piedras, Puerto Rico
… of twin tunnels (6.3m diameter) with Earth Pressure Balance machines in weathered alluvial soil. The depth of the cover over the tunnel crown varies from 13m to 10m. The twin tunnels, which connect the Rio Piedras Station and University of Puerto Rico Station, each have a length of 433 …
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Examination of excavation chamber pressure behavior on a 17.5 m diameter earth pressure balance tunnel boring machine
This thesis examines excavation chamber pressure behavior within a 17.5 m diameter earth pressure balance tunnel boring machine (EPBM) used on the Alaskan Way viaduct replacement tunnel project in Seattle, Washington, USA. The study examines behavior during the first 150 rings of tunneling (10% of …
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Numerical simulation of ground movements and structural forces in lining for Earth Pressure Balance (EPB) tunneling in clay
… mechanized tunnel construction using an Earth Pressure Balance (EPB) machine in clay. The model uses the commercial FE code, Plaxis 3D, to represent the face pressure, conical shield, grouting process and activation of precast segmental concrete lining systems through a set of boundary …
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Earth pressure balance (EPB) shield tunneling in Bangkok : ground response and prediction of surface settlements using artificial neural networks
Although Earth Pressure Balance (EPB) shields have been used for several decades, very little information exists about the actual mechanisms of shield-ground interaction. The ground response mechanism induced by EPB tunneling is difficult to understand, because this requires not only reliable …
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Three-dimensional analysis of surface settlement in soft ground tunneling
… used to carry out the numerical analysis for the earth pressure balance (EPB) shield tunneling method in a saturated, normally consolidated clay. The two construction parameters that were varied were the face pressure and the grout pressure. Longitudinal settlement profiles were obtained for many …
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Analysis of NATM and shield tunneling in soft ground
… Upper bound estimates of the critical face pressure are found in good agreement with results from centrifuge model tests. Empirical correlations for settlement estimates are re-examined, in view of case history data for shield driven tunnels. The ground movements observed on the F3 and F4 …
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Prediction and interpretation of ground movements due to tunneling in stiff clay and impacts on adjacent structures
… machines (TBM) using a combination of face pressure and grouting around the precast lining in order to limit ground movements and potential damage to overlying structures. This thesis analyzes monitoring data from the Crossrail project involving twin tunnels construction using Earth Pressure …
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Tunnel Boring Machine (TBM) performance in Singapore's Mass Rapid Transit (MRT) system
… support, while a move towards greater use of Earth Pressure Balance (EPB) was observed on the North-East line (NEL) and Circle Line (CCL). The use of EPB on the NEL resulted in 22 incidences of large, localized ground losses, which were of two types; 1. subsurface voids, or voids which formed …
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Tunnelling Effects on Bored Piles in Clay
… Bishops Bridge Road (BBR) showed the effects of earth pressure balance (EPB) tunnel boring machine (TBM) tunnelling on an overlying piled building. The other case study at Kempton Court showed the effects of sprayed concrete lining (SCL) tunnelling on an overlying piled building. Both of the …
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Prediction of instability and ground movements during tunnel construction in non-homogenous conditions
… control parameters of interest are the face pressures imposed by earth pressure balance (EPB) or slurry shield machines, and the grouting pressures used to control deformations around the tail void at the rear of the tunnel shield. Stability is evaluated by methods of (c-phi) strength …
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Procedimiento de estimación de la presión de trabajo óptima en la cámara de mezclado de un escudo de presión de tierras. Implicación en los parámetros de diseño del escudo
… designed and constructed. Tunnel execution by Earth Pressure Balance (EPB) shields is a good solution of the problems associated to that instability. The performance of EPB shield for maintaining the required support pressure at the tunnel face makes possible the construction of tunnels with a …
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Predicting adverse geology and tunnel responses utilizing tunnel-ground interaction data with machine learning techniques
… excavation face. The second study utilized EPBM (earth pressure balance machine) operational data to identify three as-encountered ground properties; 1) clay-sand mixed face conditions, 2) grain size distributions, and 3) TBM clogging potential. The EPBM operational data and geotechnical data …
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Foundation response to ground movements induced by tunnel excavation
… The crossing of the Grosvenor Bridge by an earth pressure balance tunnel boring machine (TBM) was back-analysed. Different soil-structure interaction approaches of various complexity including continuum-based elastic analyses, plane-strain finite element analysis and three-dimensional finite …
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Developing a system to measure rheology of conditioned soil for soft-ground TBM tunneling
… the growth of soft-ground tunneling using Earth Pressure Balance (EPB) Tunnel Boring Machines (TBMs) has been the most significant. EPB TBMs use the excavated muck in the machine chamber as a supporting medium before moving it to the muck haulage system. This is conducted to achieve the …
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Time-dependency of mechanical properties of EPB-conditioned soil
L'abstract è presente nell'allegato / the abstract is in the attachment