Possible role of ground improvement measures in mitigating the Chernobyl environmental disaster

Author(s):  
V. N. Zhivoderov
2018 ◽  
Vol 55 (6) ◽  
pp. 792-809 ◽  
Author(s):  
Daniel J. King ◽  
Abdelmalek Bouazza ◽  
Joel R. Gniel ◽  
R. Kerry Rowe ◽  
Ha H. Bui

For geosynthetic reinforced column supported embankments (GRCSE) supporting a high embankment, lateral forces associated with lateral sliding and embankment stability often govern the acceptability of a given design under serviceability conditions. Frequently, the complex soil–structure–geosynthetic interaction, the size, and the three-dimensional nature of a GRCSE necessitate the use of numerical analysis to assess embankment performance relative to serviceability criteria. However, traditional finite element method techniques used to model serviceability behaviour are limited in their ability to model the geotechnical mechanisms associated with column installation, equilibration, and group installation effects. These installation effects are examined herein based on a GRCSE field case study located in Melbourne, Australia, that has been extensively instrumented. The role that these installation effects have on the performance of the GRCSE is highlighted and the behaviour of the columns supporting the embankment is emphasized. It is shown that cracking of the unreinforced columns supporting the embankment is likely inevitable and that the reduction of lateral resistance provided by the columns should be accounted for in design. The suitability of various numerical approaches currently used in design to model the columns supporting the GRCSE, and the embankment itself, are discussed and recommendations are made.


2020 ◽  
Vol 3 (3) ◽  
pp. 10
Author(s):  
Xiaohe Huang

The “College English Curriculum Requirements” promulgated by the Ministry of Education of China has detailed regulations on the five aspects of English listening, speaking, reading, writing, and translating for ordinary undergraduates. However, the foreign language translation ability of most college students in China is still the weak link in the English ability structure. With the further opening up of all walks of life in China, the role of English in daily life and work is becoming more and more important. This paper analyzes and summarizes the current situation and problems of college English translation teaching in China, and proposes corresponding improvement measures.


Author(s):  
Mohamed Ramadan El-Agha

    The study aims at linking disaster and environmental management and its laws with the principles of sustainable development. This is to get the fastest and best result at the lowest cost and effort in the future sustainable development efforts. The researcher used the analytical descriptive methodology to describe laws and legislations including the Islamic law، and the principles of sustainable development، and the level of interdependence between their different components. The study concluded that there is a strong link between the components of sustainable development، environmental management and disaster management. These include protection of life with high quality، human resource protection and risk reduction. That is to strengthen the scientific and practical foundations for implementing a comprehensive preventive system. Environmental، disaster management and laws، on one hand، and sustainable development on the other، both in regulations and laws، or through various practices، coincide with Islamic law and the principles of sustainable development.    


2015 ◽  
Vol 4 (3) ◽  
pp. 1
Author(s):  
Hongjun Diao ◽  
Zhanhong Wang

Cost reduction is the goal of building engineering cost control and the main way to effectively increase corporate profit gains. In this paper, a brief discussion on the contents of engineering cost control in the building structure design is presented. It aims to make enterprises truly recognize the important role of engineering cost control through preliminary analysis and discussion and improve overall strength by a series of improvement measures.


2019 ◽  
pp. 86-99
Author(s):  
Madia Thomson

Drought and famine have been long been important events in Moroccan history and the second-half of the nineteenth century was no different. A series of such crises occurred from the 1860’s to the 1880’s, at a time when Morocco was already feeling the pressure of European expansion and the subsequent strain on its traditional trade networks. The disruption of trade networks as well as local food shortages resulting from these climatic disturbances often pushed people to migrate to major cities in search of relief. Often unable to migrate as families, individuals might leave their children in the care of others with the hope of collecting them after the crisis. An unfortunate choice but one that might just allow someone to survive. Environmental crises resulting in famine have long been a cause of global concern. In his seminal work Poverty and Famines: an essay on entitlement, Amartya Sen explains the critical role of entitlement in mitigating the effects of famine on a given population (1981). For the purposes of this article, we will focus primarily on his concept of ‘own labour’ and “production- based” entitlement. In its discussion of nineteenth-century Morocco, the article lends an historical perspective to the modern system of national and international cooperation during environmental crises. That one no longer hears of people dying from such crises in Morocco suggests that death and famine are not necessary consequences of environmental disaster but rather the result of a lack of ideas and infrastructure.


2021 ◽  
Vol 14 (1) ◽  
pp. 58
Author(s):  
Koki Nakao ◽  
Shinya Inazumi ◽  
Toshiaki Takaue ◽  
Shigeaki Tanaka ◽  
Takayuki Shinoi

Most of the ground in Japan is soft, leading to great damage in the event of liquefaction. Various ground-improvement measures are being taken to suppress such damage. However, it is difficult to carry out ground-improvement work while checking the internal conditions of the ground during the construction. Therefore, a visible and measurable evaluation of the performance of the ground-improvement work was conducted in this study. The authors performed a simulation analysis of the relative stirred deep mixing method (RS-DMM), a kind of ground-improvement method, using a computer-aided engineering (CAE) analysis based on particle-based methods (PBMs). In the RS-DMM, the “displacement reduction type (DRT)” suppresses displacement during construction. Both the DRT and the normal type (NT) were simulated, and a visible and measurable evaluation was performed on the internal conditions during each construction, the quality of the improved body, and the displacement reduction performance. As an example of these results, it was possible to visually evaluate the discharge of surplus soil by the spiral rod attached to the stirring wing of the DRT. In addition, the authors succeeded in quantitatively showing that more surplus soil was discharged when the stirring wing of the DRT was used than when the stirring wing of the NT was used.


2018 ◽  
Vol 3 (2) ◽  
Author(s):  
Lars Harald Lied

The purpose of this article is to define the potential role unions can play in a general quest for improved practice in an industrial company. Workplace innovation (WPI) is one example of such a measure. Lean is another. The article outlines important elements when implementing improvement tools like Workplace Innovation and Lean practice. The efforts are focused at company level, and experiences from a Norwegian industrial company highlight the areas of importance. The amplifying role a union can play in an improvement process is discussed, and motives and processes are clarified, in order to show the role of unions in a broader sense. The “Nordic” tradition of organising work-life frames the considerations made in this paper, but elements of experience can also be valuable in other work-life traditions. Practical improvement is the ultimate goal in an improvement project, and this article shows how unions can play an active part and amplify the results when it comes to enhancing organisational performance. Theories and experiences are supported by interviews with experienced leaders and employee representatives. Changes are often met with resistance, and the article shows that unions, under certain circumstances, can play a facilitative role when it comes to the implementation of improved practice. Joint motives provide a unique opportunity to succeed, and Workplace Innovation and other improvement measures can represent a “win – win” formula in that sense. A democratic and dialogical approach towards Work Life design contributes to both efficiency and stimulating workplaces through Workplace Innovation and Lean Management.


Sign in / Sign up

Export Citation Format

Share Document