Evaluation of P and S Wave Velocities and Their Return Energy of Rock Specimen at Various Lateral and Axial Stresses
| Autor: | Mahmoud Hashemi Isfahanian, Mojtaba Heidari, Akbar Ghazifard, Rassoul Ajalloeian |
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| Rok vydání: | 2020 |
| Předmět: |
Hydrogeology
0211 other engineering and technologies Soil Science Pyroclastic rock Geology 02 engineering and technology 010502 geochemistry & geophysics Geotechnical Engineering and Engineering Geology 01 natural sciences Stress (mechanics) Rock engineering Architecture S-wave Cylinder stress Ultrasonic sensor Geotechnical engineering Energy (signal processing) 021101 geological & geomatics engineering 0105 earth and related environmental sciences |
| Zdroj: | Geotechnical and Geological Engineering. 38:3253-3270 |
| ISSN: | 1573-1529 0960-3182 |
| DOI: | 10.1007/s10706-020-01221-9 |
| Popis: | Determining the engineering characteristics of rocks is one of the most important challenges in designing construction projects. The triaxial rock testing is one of the most common tests to determine rock engineering properties. In this paper, dynamic properties of a pyroclastic rock specimen have been investigated using multiple ultrasonic tests during rock loading in the servo-controlled triaxial machine. In order to determine these properties, the velocity of P and S waves and the return energy of these waves at different axial and lateral stresses on a rock specimen were evaluated. The results show that the increase of the axial stress to the rock specimen increases the velocity of these waves and their return energy. However, the effect of increasing lateral stress can only be clearly seen in the return energy of the wave. In addition, the ratio of P to S wave velocities (VP/VS) at different axial and lateral stresses ranges from 1.25 to 1.40 and the ratio of the return energies of these waves is approximately between 1.5 and 2.5. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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