The Role of Geological Uncertainty in a Geotechnical Design—A Retrospective View of Freeway No. 3 Landslide in Northern Taiwan

2021 ◽  
Author(s):  
Chih-Hsiang Yeh ◽  
Jia-Jyun Dong ◽  
Sara Khonevisan ◽  
C. Hsein Juang ◽  
Wen-Chao Huang
2021 ◽  
pp. 106233
Author(s):  
Chih-Hsiang Yeh ◽  
Jia-Jyun Dong ◽  
Sara Khonevisan ◽  
C. Hsein Juang ◽  
Wen-Chao Huang ◽  
...  

2019 ◽  
Vol 92 ◽  
pp. 03002 ◽  
Author(s):  
Letícia Morais ◽  
Manoel Cordão-Neto ◽  
Alessandro Tarantino

Clay geomaterials pose a great challenge in geotechnical design due to their complex mechanical behaviour. Despite the vast research on clay mechanical behaviour, mechanisms occurring at the particle-scale still remain largely unknown. Particle-to-particle interactions include electro-chemical forces, which can be in turn associated with repulsive/attractive Coulomb interaction and attractive van der Waals force. This work aims to investigate the role of attractive forces (van der Waals and Coulomb) via their control of the process of aggregation (attractive forces tend to form aggregates of clay particles). Dry clay particles were compressed under high stress to reduce particles distances and activate attractive van der Waals and Coulomb forces. Particle size distribution was then measured using laser granulometry to explore aggregation formation. Laser granulometry tests were performed with and without ultrasound and with and without dispersant. Results show that the higher the compressive stress applied to the sample, the bigger is the ‘particle’ size measured by the laser granulometry, which corresponds to formation of aggregation due to attractive forces. Ultrasound appeared to disaggregate the aggregates thus suggesting that van der Waals and Coulomb forces are sensitive to dynamic loading.


2020 ◽  
Vol 800 (1) ◽  
pp. 012004
Author(s):  
D Anafarta ◽  
E Turk ◽  
S O Akbas

Abstract A shallow slope failure has occurred on the cut slopes of the Bigadic-Simav-Abide highway at the section located between Km:125+530-125+870, during construction. A detailed investigation of the landslide mechanism, which includes site specific surveys, laboratory studies, and stability analyses indicates that the main reason of the failure lies within the construction procedure details. This study focuses on the forensic geotechnical engineering procedures applied for determining the cause of the slope failure. An emphasis was placed on the importance of strictly following the construction sequence as illustrated in the design documents in detail, as well as on the indispensable role of continuous communication between the designer and the contractor for successful performance of geotechnical works.


2016 ◽  
Vol 67 (1) ◽  
pp. 5-30
Author(s):  
Alexandra Jarošová

Abstract The paper aims at giving a retrospective view of the presence of Czech in Slovakia through prism of the concepts language situation, communication situations and standardness. Within the conditions of the feudal heterogeneity of the Hungarian Monarchy and without any distinct cultural and political centre of the Slovaks, in a situation of considerable dialectal variety, the Czech language fulfilled the role of a comprehensible and within the whole society (among educated Slovaks) valid and relatively unified written form of the “local language” (lingua vernacula). In the 14th and the 15th centuries this Czech got only relatively little Slovakized. During the 16th and the 17th centuries two mutually overlapping tendencies of the development of the written language of the Slovaks were being formed: 1. Slovakized Czech, or a Slovak-version Czech, and 2. Regional Variants of Cultural Slovak. Both tendencies found their place in the Catholic as well as in the Protestant environment. In the 2nd half of the 18th century, with continuation into the beginnings of the 19th century, two directions that started to be formed already in the previous period, became crystalized: 1. Under the influence of the progressing re-Catholicization, the Slovakized Czech of the Protestants undertook the direction from diglossia towards “pure” Czech (at least in the sense of an intention), and the Protestant circles unequivocally accepted it as their standard language, sometimes denoting it as reč československá (Czechoslovak language) or českoslovenčina (the Czechoslovak); 2. In the Catholic environment, the cultural Western Slovak of the southern type and called bernolákovčina (Bernolák‘s Slovak) was codified, with the status of an autonomous standard language – a development away form diglossia towards Slovak. It was a period of two standard languages to which Štúr’s codification of Slovak put an end. His codification was based on the northern Central Slovak dialects, and after its modification in the so called opravená slovenčina (“corrected Slovak”) it was accepted by the representatives of both confessions.


2014 ◽  
Vol 29 (3) ◽  
pp. 218-229 ◽  
Author(s):  
Rene Poccard-Chapuis ◽  
Livia Navegantes Alves ◽  
Marcia Mascarenha Grise ◽  
Alassane Bâ ◽  
Doubangolo Coulibaly ◽  
...  

AbstractIntegrated crop–livestock systems in the tropical region are diverse and not well characterized. To better understand the conditions and potential of these systems, we characterized the spatial and social arrangement of integrated systems within a landscape context. Integrated systems are defined by biomass and nutrient flows, linking crop, livestock and human components of agriculture. The landscape is defined within a spatial framework of these flows. To understand the diversity of integrated systems in the tropics, we characterized three case study areas: Southern Mali, BrazilianCerradosand Amazon frontier. Methodology was based on historical and descriptive approaches of these cases, mobilizing interdisciplinary knowledge of a large research team. This provided a retrospective view to discuss four key points about the future of integrated systems in the tropics: (i) importance of landscape structure for conception and adaptation of the integrated systems; (ii) key role of local institutions in managing such integrated systems; (iii) trade-offs between external and internal resources; and (iv) role of nitrogen to improve system efficiency. This paper concludes with the relevance of social sciences in the further development of integrated systems.


Refuge ◽  
2016 ◽  
Vol 32 (2) ◽  
pp. 30-40
Author(s):  
Anna N. Vu ◽  
Vic Satzewich

This article examines the role of NGO resettlement workers in refugee camps in Southeast Asia during the late 1970s and 1980s. The workers offered psychological support to refugees whose lives were in turmoil, but they also helped them present themselves in ways that would be most attractive to Western host countries. This process involves both commission and omission. NGO resettlement workers sometimes actively guided refugees by giving them specific advice and training. At other times, they facilitated this endeavour by observing how refugees fit themselves into the selection categories of various states, but chose to remain silent in order to avoid jeopardizing the refugees’ chances for resettlement.


2010 ◽  
Vol 2010 (1) ◽  
pp. 1-4
Author(s):  
Laurent Ailleres ◽  
Mark Lindsay ◽  
Mark Jessell ◽  
Eric deKemp

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