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The degree of deterioration of the tunnels of the Prague Metro based on a monitoring assessment
Ivan Vaníček, Martin Vaníček, 2007, izvirni znanstveni članek

Opis: Understanding the ageing of structures is a very important issue from the point of view of assessing the risk inherent in those structures. Geotechnical structures, of course, have their own specific risks. This paper is focused on the tunnels of the Prague Metro, looked at from various aspects, i.e., geology, construction systems, and the influence of flooding. The section of the tunnels that was selected for monitoring is one of the most affected, and has a large system of cracked segments. However, even for this affected section the monitoring systems, based on macro- and micro-approaches, showed no significant deterioration was taking place. Nevertheless, for long-term monitoring a wireless system for data collection and transfer was installed and implemented. The results so far have been very positive.
Ključne besede: tunnel, metro, deterioration, ageing, geology, construction, monitoring assessment, MEMS, geophysical, wireless data transfer, metro flooding
Objavljeno: 18.05.2018; Ogledov: 522; Prenosov: 16
.pdf Celotno besedilo (1,21 MB)
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The importance of tensile strength in geotechnical engineering
Ivan Vaníček, 2013, izvirni znanstveni članek

Opis: Many Soil mechanics textbooks contain only limited information about tensile characteristics. Šuklje’s “Rheological aspects of soil mechanics” [1] is an exception, as he devoted a special chapter to this problem “Tensile and Bending Strength of Soils”. Therefore, it is not a great surprise that the subject of the 13th Šuklje’s Lecture is devoted to soil behaviour in tension. Tensile tests are briefly described, some results as well, with a distinction between undrained and drained tests. Practical examples of the application of the results are discussed, firstly in cases where the development of tensile cracks can be expected. Because the results of the drained tests give more information about the bonds between individual particles, some theoretical aspects of these tests are discussed as well.
Ključne besede: tensile cracks, tensile strength, bending, triaxial drained tensile test
Objavljeno: 14.06.2018; Ogledov: 391; Prenosov: 24
.pdf Celotno besedilo (549,04 KB)
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