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Analyzing the Impact of Large Dams on Seismicity Patterns around Their Locations

Parvizishad Mina, Naseri Simin, Nabizadeh Ramin, Bidar Abdollah Sohrabi, Mahvi Amir Hossein, Goodarzi Fatemeh

Archives of Hydro-Engineering and Environmental Mechanics

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2021

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Vol. 68, nr 1

3--17

EN

Dam construction is one of the most popular solutions for managing water resources. In recent years, changes in patterns of regional seismicity associated with large impoundment dams have raised concerns among environmentalists. In this study, five large dams located in Iran were studied from this perspective. The Gutenberg-Richter, linear regression and T-test were used to examine the seismic changes in the radius of 100 km of each of the dams during a twenty-five-year period before and after the construction of the dams. The results revealed that the seismicity level and relative density of large and small earthquakes in three of these dams have increased after dam construction. A significant difference between the magnitude of earthquakes, as well as the number of earthquakes before and after the construction of dams in the region, was recognized. However, the results of the T-test statistical analysis indicated that the mean depth of the earthquakes and their distance from the dams before and after construction have not changed significantly. Overall, these results indicated that the construction of large impoundment dams has been associated with some changes in patterns of regional seismicity. The findings would guide researchers to further investigate the type of impacts that dam construction may have on seismicity patterns.

2

Dam construction material selection by implementing the integrated SWARA–CODAS approach with target-based attributes

Maghsoodi Abteen Ijadi, Maghsoodi Arta Ijadi, Poursoltan Parastou, Antucheviciene Jurgita, Turskis Zenonas

Archives of Civil and Mechanical Engineering

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2019

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Vol. 19, no. 4

1194--1210

EN

The selection of the optimal material in engineering design procedures of any construction project due to the complexity of future circumstances could be considered as a complex problem. Similar complex selection problems can be efficiently implemented with the support of Multiple Attribute Decision Making (MADM) methods. The traditional MADM methods focus both on beneficial or non-beneficial attributes to determine a rank order of feasible alternatives and to select the best one. Nevertheless, like many engineering design problems, some attributes could be assessed based on target values. Therefore, target values of attributes along with beneficial and non-beneficial attributes makes a decision-making method more robust. Despite practical and functional applications of the target-based MADM approaches particularly in engineering design problems, only a few studies have made attempts to implement such methods. The presented study tackles a material selection problem by applying a hybrid decision-making approach supported on the Step-Wise Weight Assessment Ratio Analysis (SWARA) method and COmbinative Dis-tance-based ASsessment (CODAS) technique containing target-based attributes. A case-study concerning the selection of optimal cement material type based on a real-world conceptual dam construction project in Iran has been analyzed by the proposed method considering two categories of attributes, i.e., managerial issues and technical specifications.

3

Postęp w zastosowaniu betonu wałowanego do budowy zapór wodnych

Salamon J. W., Hansen K. D.

Cement Wapno Beton

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2018

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R. 21/83, nr 1

48--58

PL

Beton wałowany uznawany jest jako jedno z największych osiągnieć w technologii budowy zapór wodnych w ostatnich 30 latach. Technologia ta zyskała szerokie zastosowanie czego odzwierciedleniem jest prawie 750 ukończonych lub w trakcie budowy projektów hydrotechnicznych. Budowanie zapór z betonu wałowanego polega na korzystaniu z metod ogólne stosowanych przy budowie zapór ziemnych, co prowadzi do znacznego skrócenia czasu i co za tym idzie zmniejszenia kosztów budowy. Stosowanie dużej zawartości spoiw złożonych z cementu popiołów lotnych i dodatków mineralnych w mieszankach betonowych zapewnia dużą wytrzymałość betonu wałowanego, porównywalną z wytrzymałością konwencjonalnego betonu wibrowanego. Technologia budowy zapór z wykorzystaniem betonu wałowanego ciągle się rozwija, a także jest ulepszana z każdym ukończonym projektem.

EN

Roller-compacted concrete has been called the most significant advancement in dam building technology in the past 30 years. The use of RCC has gained widespread acceptance worldwide with approximately 750 RCC dam projects completed or under construction as of 2017. Construction of RCC dams using methods associated with earth dam construction leads to a shorter time of construction and to lower overall project costs. At the same time, high-cementitious RCC mixes provide strength equivalent to the strength of conventional mass concrete. RCC technology continues to advance with the completion of each new project.

4

Industrial waste as an effective material for dam construction

Vaclavik V., Lembak M.

Górnictwo i Geoinżynieria

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2005

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R. 29, z. 3/2

111-120

EN

The paper presents the issue of tailing supply utilization in dam construction, covers general overview of these wastes produced in Ostrava - Silesian Region as well as experimental results and practical experience with the realization of dam construction in the undermined areas. In Ostrava - Silesian Region mining waste mainly contain the anthracite mining wastes, i.e. tailings - produced in a quantity of cca 9.8 million tons per year. Besides, considerable amount of other industrial wastes (slag, loose ashes, scoria) is produced there as well. These wastes are concentrated in a relatively small area of the region. From the facts listed above we can deduce that the present state of ecology is abject there. Provided that the major part of these wastes would be put back into the mined-out areas or utilized as building material, there is a certain possibility to protect the environment. Utilization of formerly mentioned wastes (slag, loose ashes, scoria) in road engineering is described in the references.

PL

Opracowanie przedstawia zagadnienie wykorzystania odpadów poflotacyjnych do konstrukcji stawów osadowych, zawiera ogólny przegląd tego rodzaju odpadów produkowanych w rejonie Ostrawy oraz prezentuje wyniki i doświadczenia praktyczne zdobyte podczas eksperymentalnej konstrukcji stawu osadowego zlokalizowanego na obszarze poeksploatacyjnym.