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Skopje
The PDF file of this paper is in Macedonian. _ Abstract This paper presents certain aspects of the design of the foundations of the "Mihajlo Apostolski" bridge over the Vardar river on the ASNOM boulevard in Skopje. The bridge consists of two separate structural units (branches), each with a total length of 93.6 m and a width of 15.3 m. The static system is a frame of three spans, also known as an integral type of bridge. The upper structure consists of a monolithic prestressed box two-cell girder with a parabolically variable bottom plate height and width. The end and middle columns are in the form of reinforced concrete plates, respectively founded on single-row and double-row piles. Considering the static system of the bridge, the deformability of the piles is also included in the analysis, which achieved a more realistic simulation of the behavior of the structure under the action of horizontal forces and forced deformations. Among other things, this paper also covers the stage of construction works, especially the construction of the foundations. Namely, during the construction of the foundations, the reinforcement cage is pulled out of one of the piles, for which the need for remediation of the damaged pile was imposed. First of all, the possible reasons for this situation were identified, as well as the possible solutions for remediation, after which detailed analyzes were carried out and the adoption of the most technically acceptable solution. Changes in the structure's foundation system have significant implications in the behavior of the superstructure. Hence the seriousness of the problem in question, and especially the approach to its remediation, which confirms the complexity of the remediation of the foundations of the structures.
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- Materials > Construction Materials (0.54)
- Construction & Engineering (0.54)
Abstract This paper addresses the measurement of the absolute acceleration of gravity force in the Republic of North Macedonia that was carried out at three stations and includes the measurement of the relative acceleration at 2.310 points. The measurement of the relative acceleration of the gravity force was carried out into the Basic Gravimetric Network as part of the project „Detailed Gravimetric Survey MK-RECRP-7928-ICB-C5.4-14-1“, after which it was levelled with the three stations in with the absolute acceleration of the gravity force was measured. The established gravimetric network is a solid basis for furthers regional gravimetric survey activities, with the aim of more precisely defining the geoid in the territory of the Republic of North Macedonia.
anomaly, banking & finance, europe government, geotechnic isrm specialized conference 2022, gravimetric network, gravimetric survey, gravity force, jovan br, macedonia government, macedonian association, north macedonia, reference system, relative acceleration, Republic, Reservoir Characterization, Symposium, territory, Upstream Oil & Gas
Industry:
- Banking & Finance (0.52)
- Energy > Oil & Gas > Upstream (0.50)
- Government > Regional Government > Europe Government > Macedonia Government (0.40)
SPE Disciplines:
Tradition of rock mechanics in Macedonia
Jovanovski, Milorad (University Ss. Cyril and Methodius in Skopje) | Gapkovski, Naum (University Ss. Cyril and Methodius in Skopje) | Peshevski, Igor (University Ss. Cyril and Methodius in Skopje) | Papic, Jovan Br. (University Ss. Cyril and Methodius in Skopje)
Abstract More than 70 years have passed since establishing the Chair of Soil Mechanics, Foundation Engineering and Geology at the Technical Faculty in Skopje; exactly 71 years since the application of the radial jack testing method for the very first time in the world, and more than half of century after the Second Congress of International Society for Rock Mechanics, held in Belgrade in 1970. Having this in a mind, as a tribute to these important events, some data about tradition of rock mechanics in Macedonia are presented, as well as contributions of experts from the region of Former Yugoslavia to the development of rock mechanics worldwide. Facts about scientific and teaching tradition, first-time-ever application of rock testing methods, and some rare phenomenons – part of the world geological heritage, are underlined. Beside this, the idea is to ensure applicable engineering politics in the region and to contribute to the promotion of enlarging the rock mechanics community.
Engineering, europe government, faculty, geotechnic, geotechnic isrm specialized conference 2022, geotechnical engineering, Institute, jovan br, Jovanovski, macedonia government, macedonian association, passive seismic, Reservoir Characterization, reservoir geomechanics, rock mechanic, seismic surveying, serbia government, skopje, Symposium, University, Upstream Oil & Gas, Wellbore Design
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- Energy > Oil & Gas > Upstream (1.00)
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Oilfield Places: North America > United States > Alaska > North Slope Basin > Western North Slope > Colville River Field > Alpine Field > Kingak Formation (0.94)
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Abstract Understanding time-dependent deformation and fracturing in rock is essential, because the information of the long-term stability of rock is required for many sub-surface structures excavated in a rock mass. Time-dependent fracture propagation has been invoked as a potential key mechanism responsible for the increase in seismicity preceding earthquake ruptures. In engineering projects and in preventing natural hazards, the study of time-dependent fracturing is necessary. Subcritical crack growth is one of the main causes of time-dependent fracturing in rock. For silicate rocks, subcritical crack growth has been investigated by various researchers. It has been clarified that surrounding environmental conditions (temperature, humidity, and existence of water) have strong influence on subcritical crack growth in silicate rocks. Therefore, the information of subcritical crack growth in silicate rocks has already been enough. On the other hand, information of subcritical crack growth in carbonate rocks is not enough. Especially, the influence of surrounding environment on subcritical crack growth in carbonate rock has not been clarified yet. In this study, we investigate subcritical crack growth in carbonate rock experimentally using a fracture mechanics testing method. Marble obtained in Skopje in Macedonia is used as a carbonate rock sample. The Double Torsion method is used to measure the crack velocity and stress intensity factor. Especially, influence of water on subcritical crack growth in Macedonian marble is investigated. It was shown that the crack velocity in water is much higher than that in air at the same temperature. Based on the results of subcritical crack growth measurements, the long-term strength is evaluated for marble. It was clarified that the long-term strength in water is lower than that in air in marble. It is concluded that water has a remarkable influence on subcritical crack growth in marble. It is also considered that the long-term stability of carbonate rock masses should be ensured in a dry environment. Introduction For the structures in a rock mass such as the repositories of the radioactive waste in underground, the caverns for storing liquefied petroleum or natural gas, or the underground power plants, long-term stability should be ensured. It is also essential to ensure the stability of the rock slopes in open-pit mines for the safety in mining. For these purposes, time-dependent deformation and fracture propagation in rock should be understood well. Therefore, it is important to study time-dependent fracturing in rock for both designing rock engineering projects and preventing any disasters in a rock mass.
13th international congress, carbonate reservoir, complex reservoir, crack growth, crack velocity, hydraulic fracturing, Kaneko, long-term strength, Macedonian marble, marble, may 2015, Nara, relative humidity, Reservoir Characterization, rock mechanics isrm13, stress intensity factor, subcritical crack growth, Upstream Oil & Gas
SPE Disciplines:
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