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 20 of 25 for “"EPB"”.
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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
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Earth pressure balance (EPB) tunneling induced settlements in the Tren Urbano Project, Rio Piedras, Puerto Rico
Underground construction of the Rio Piedras section of the Tren Urbano project involved the construction 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 …
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Nuevo modelo Madrid para la estimación de asientos producidos en túneles con tuneladoras epb de gran diámetro
… ejecutadas con tuneladora, trabajando en modo EPB (líneas que son descritas). - Recopilación de todos los datos de la instrumentación dispuesta (sólo se analizan aquellos que puedan considerarse de “campo libre”: no en edificios ni en infraestructuras ni en zonas en donde se haya realizado un …
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Numerical simulation of ground movements and structural forces in lining for Earth Pressure Balance (EPB) tunneling in clay
… 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 conditions that advance …
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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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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
… escudos de presión equilibrada de tierras (EPB) permite solucionar, en gran medida, los problemas asociados a dicha inestabilidad. La eficacia y seguridad demostradas por los escudos EPB para el mantenimiento de una determinada presión en el frente de excavación, facilita la ejecución de …
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Tunnel Boring Machine (TBM) performance in Singapore's Mass Rapid Transit (MRT) system
… 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 above the tunnel face …
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Non-invasive detection of the electromyographic activity of the deep extrinsic thumb muscles using surface electrodes
… Pollicis Longus (EPL), Extensor Pollicis Brevis (EPB) and Abductor Pollicis Longus (APL) using surface electrodes. Methods: High density monopolar EMG was detected from 2 concentric rings, each consisting of 20 custom designed and manufactured silver electrodes, placed at the distal and proximal …
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Response of continuous pipelines to tunnel induced ground deformations
… a largediameter sewer tunnel in soft clay using EPB construction methods (using free-field performance data from the N-2 project in San Francisco) on existing utilities. In this case, potential damage to cast-iron water pipes is clearly linked to the pipe section properties and the EPB tunnel …
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Prediction and interpretation of ground movements due to tunneling in stiff clay and impacts on adjacent structures
… construction using Earth Pressure Balance (EPB) machines in London Clay. The research focuses on the 'greenfield' response during tunnel excavation beneath Hyde Park. Far-field measurements of surface and subsurface ground movements were interpreted using 2D finite element analyses using a …
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Automated Detection and Analysis of Low Latitude Nightside Equatorial Plasma Bubbles
Equatorial plasma bubbles (EPBs) are large structures consisting of depleted plasma that generally form on the nightside of Earth's ionosphere along magnetic field lines in the upper thermosphere/ionosphere. While referred to as `bubbles', EPBs tend to be longer along magnetic latitudes and …
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Developing a system to measure rheology of conditioned soil for soft-ground TBM tunneling
… 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 desired functionality of …
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Three-dimensional analysis of surface settlement in soft ground tunneling
… 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 different face pressures …
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Techniques for automated classification of nighttime ionospheric images
… those that contain equatorial plasma bubbles (EPB) or medium-scale traveling ionospheric disturbances (MSTID). However the majority of the images collected contain neither EPBs nor MSTIDs, or are contaminated by other light sources or clouds. In order to identify the images of interest, …
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Observations of the thermosphere using measurements from long-term Fabry-Perot interferometers
… along with equatorial plasma bubble (EPB) observations from a collocated all-sky imager (ASI) to study the activation of the disturbance dynamo.
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Synthesis, characterization and properties of hybrid organic - inorganic perovskites for photovaltaic applications
… showing a general trend of ECl > EBr > EI and EPb >EBi. By analogy with classical inorganic perovskites, the hybrid phases can crystallise in both three-dimensional (3D) and low dimensional perovskite-like forms. To improve the stability and remove the toxicity in the current prototypical …
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Evidence-based Practice: An Exploration of Meaning Making Among Leaders of Community Coalitions
… that scholars argue are optimal hosts for EPB – that is, organizations dedicated to learning and evaluative inquiry.</p> <p>Although a strong majority of participants believe that EBP “is here to stay,” findings give credence to claims that challenges posed by inexact or competing …
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Novel Reactors for Biological Treatment of High Strength Nitrogen and Carbon Wastewater
… expected for a Martian Early Planetary Base (EPB), but the EPB wastewater is similar to terrestrial wastewater such as digester effluent and separated-source wastewaters. The NDX system had a working volume of 53 liters including a set of three foam media scaffolds that provide surface area …
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Interfacial stress analysis and strengh prediction of plated rc beams
… concrete (RC) beams by external plate bonding (EPB) technique has become very popular for the last two decades, especially in the past few years with the increasing applications of the advanced composites. Unlike the unstrengthenedb eams, the composite structure shows an undesirable failure of …
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Centrifuge modelling of the impact of mechanised tunnelling on piled foundations using a miniature TBM
… proposition. In this research, a miniature EPB TBM was developed for use in the Turner beam centrifuge at the University of Cambridge aiming to simulate the impact of tunnel construction on existing piled foundations. The model TBM simulates most features of real-life tunnelling machines …
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