Behaviour of compacted silt used to construct flood embankment

This paper investigates the unsaturated mechanical behaviour of a fill material sampled from flood embankments located along the Bengawan Solo River in Indonesia. In order to gain a better understanding of this fill material, in situ tests were carried out alongside an extensive laboratory programme. Two different phenomena related to changes in moisture content of the embankment fill material are experimentally studied herein: (a) volumetric collapse and (b) variation in shear strength with suction. At low densities, similar to those found in situ, the material exhibited significant volumetric collapse behaviour. Triaxial tests carried out under saturated, suction-controlled and constant water content conditions indicate that the shear strength of the material increased with suction; in particular the effective angle of friction increased from 24.9 degrees under saturated conditions to 35.8 degrees under air-dried conditions

Mesures (sud du Maroc)

Chez les Ichelhiyn (sud du Maroc), le système ancien des mesures traditionnelles recourt à certaines parties du corps comme l’avant-bras, le doigt, le pied, etc. L’idée même de « mesurer, mesure » est dérivée du nom de l’avant-bras : sɣel « mesurer » iɣil « avant-bras ». A partir du verbe sɣel, on a le nom asqqul [*asɣɣul] « mesure, mesurage ». On se servait autrefois de l’avant-bras iɣil pour mesurer les longueurs et les surfaces. Cette unité de mesure, qui correspond environ à 50 cm, iɣil,..

Maison, tigmmi en tachelhit (note linguistique)

Dans une bonne partie de l’aire géographique du tachelhit, « maison » est désignée par le terme tigmmi (fém. sing.). Le même mot est attesté aussi dans plusieurs parlers berbères avec des acceptions plus au moins proches qui se rapportent toutes du champ sémantique de l’habitation : « domaine, maison, tente », Ayt Hdiddou (Azdoud 1985 : 66) « vaste terrain de culture », kabyle (Dallet 1982 : 260) ; « douar, groupe de tentes dressées et disposées en cercles ; groupe de gens placés en rond ; pl..

Maison

wife is not suffering pain. I am faithfully yoursJohn MuirI start back to Adamana tomorrow. Had to come to the desolate home on business. Helen will probably have to remain in Arizona a year or more.[in margin: Muir]https://scholarlycommons.pacific.edu/jmcl/28427/thumbnail.jp

Kerkur

Ce terme, d’origine berbère mais largement passé en arabe dialectal (surtout au Maroc, avec vélo-pharyngalisation des « r » : [keṛkûṛ]), désigne les tas de pierres constitués par les voyageurs et pèlerins en certains lieux caractéristiques, à forte charge symbolique : cols, croisements de chemins, lieux où a été commis un crime... Le voyageur, pour conjurer le mauvais sort et/ou les forces maléfiques qui habitent le lieu, jette ou dispose un/des caillou(s) supplémentaire (s). Ce rite, déjà pr..

Practical aspects of partial discharge measurement for HVDC cables

High-voltage direct current (HVDC) cables are increasingly being installed to connect new offshore wind farms. Unplanned outages of these connectors can cause high economic impacts. Hence, there are requirements for condition-based maintenance that can improve operational reliability. Partial discharge (PD) is indicative of insulation defects. PD monitoring for AC cables is well established, but before applying the technique to HVDC cable connections, it is important to characterise PD behaviour under DC conditions and the attenuation in HVDC cables. This paper investigates PD activity under non-ideal DC stress, PD signal attenuation in HVDC cables, and electromagnetic noise in converter stations. Under the voltage of superimposed DC and harmonics, PD pulses tend to synchronise with the phase of harmonics. Therefore, synchronised recording of PD pulses can produce phase resolved patterns as an additional tool for insulation diagnostics. Modelling of attenuation in a HVDC transmission cable indicates that a detection bandwidth of tens of kHz to a few MHz may improve detection sensitivity when measuring PD current pulses over very long cable runs is carried out through sensors such as high frequency current transformers (HFCTs) installed at cable ends. Additionally, the RF spectrum measured in a converter station cable hall did not include any switching-related signals, demonstrating the viability of RF sensors based PD monitoring for the HV components associated with the cable connections

An overview of research activities and achievement in Geotechnics from the Scottish Universities Geotechnics Network (SUGN)

ABSTRACT: Design of geotechnical systems is often challenging as it requires the understanding of complex soil behaviour and its influence on field-scale performance of geo-structures. To advance the scientific knowledge and the technological development in geotechnical engineering, a Scottish academic community, named Scottish Universities Geotechnics Network (SUGN), was established in 2001, composing of eight higher education institutions. The network gathers geotechnics researchers, including experimentalists as well as centrifuge, constitutive, and numerical modellers, to generate multiple synergies for building larger collaboration and wider research dissemination in and beyond Scotland. The paper will highlight the research excellence and leading work undertaken in SUGN emphasising some of the contribution to the geotechnical research community and some of the significant research outcomes. RÉSUMÉ: Conception de systèmes géotechniques est souvent difficile car elle nécessite la compréhension du comportement des sols complexes et son influence sur la performance échelle du champ de géo-structures. Pour faire avancer la connaissance scientifique et le développement technologique en ingénierie géotechnique, une communauté universitaire écossais, nommé écossais universités Géotechnique réseau (SUGN), a été créé en 2001, la composition des huit établissements d'enseignement supérieur. Le réseau réunit géotechnique chercheurs, y compris les expérimentateurs ainsi que centrifugeuse, constitutif, et les modélisateurs numériques, de générer des synergies multiples pour la construction de plus grande collaboration et une plus large diffusion de la recherche en Ecosse et au-delà. Le document mettra l'accent sur l'excellence de la recherche et de diriger le travail entrepris dans SUGN soulignant certains de la contribution à la communauté de recherche en géotechnique et certains des résultats importants de la recherche

The DISTINCTIVE University Consortium: Structural Integrity

The Engineering and Physical Sciences Research Council (EPSRC) sponsored DISTINCTIVE consortium (Decommissioning, Immobilisation and Storage Solutions for Nuclear Waste Inventories) is developing technologies for civil infrastructure repair, in-situ subsurface waste immobilisation, and groundwater protection during construction and decommissioning. The consortium has contributed to the development of skilled cross-disciplinary civil engineers and scientists, that have the knowledge and experience required to develop engineering solutions tailored for application within radiologically contaminated sites. The Structural Integrity Theme focuses on challenges ranging from site-scale infrastructure preservation and restoration, through injectable ground barriers for risk mitigation, to the remote characterisation and handling of individual waste packages. The main aim of the theme is to develop novel engineering solutions, tailored for use on radiologically contaminated sites, for: ground protection; infrastructure characterisation; concrete restoration and waste characterisation. Technologies should minimise current, and future, radiation exposure of the workforce whilst providing economically viable engineering solutions

TERRE project : interplay between unsaturated soil mechanics and low-carbon geotechnical engineering

The geotechnical construction industry is a major component of the overall construction sector and is strategically important in infrastructure development (transportation, flood and landslide protection, building foundations, waste disposal). Although industry and research in the overall construction sector have been investing significantly in recent years to produce innovative low-carbon technologies, little innovation has been created in geotechnical construction industry, which is lagging behind other construction industry sectors. This paper discusses the interplay between low-carbon geotechnical engineering and unsaturated soil mechanics based on the research carried out within the project TERRE (Marie Skłodowska-Curie Innovative Training Networks funded by the European Commission, 2015-2019,H2020-MSCA-ITN-2015-675762)