Modern nondestructive method of researching of geological-engineering section
| Autor: | V. G. Ofrikhter, Russian Federation |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Engineering
business.industry 0211 other engineering and technologies 02 engineering and technology Structural engineering 010502 geochemistry & geophysics 01 natural sciences Vibration Shear modulus Transverse plane symbols.namesake Surface wave Section (archaeology) symbols Stage (hydrology) Rayleigh wave business Elastic modulus 021101 geological & geomatics engineering 0105 earth and related environmental sciences |
| Zdroj: | PNRPU Construction and Architecture Bulletin. 7:37-49 |
| ISSN: | 2305-2724 2224-9826 |
| Popis: | A lot of modern nondestructive methods of investigation of the low-velocity zone are actively improved and effectively applied abroad. In the absence of necessity to perform work on drilling the soil mass labor costs are significantly reduced. Accuracy and correctness of the final results which are obtained by non-destructive methods is almost the same as when using destructive methods. The purpose of this article is to review modern nondestructive methods of investigation geological-engineering section which is based on the analysis of the lowvelocity zone of the upper section. These methods include spectral analysis of surface waves (SASW) and multi-channel analysis of surface waves (MASW). They are based on dispersive properties of Rayleigh waves. Rayleigh waves arise at the boundaries of the medium-to-air from a variety of sources. Vibrations can be caused by a force with a sledgehammer and a metal plate or from influence of other environmental sources. The procedure for both methods considered in detail at every stage of the work. The measuring system for MASW is also considered in detail. Furthermore in the article there are recommendations for the placement of receivers in the investigated area. The analysis of field data and making the profile of transverse velocities are also described for different methods of MASW: active, passive, passive roadside. At the end the initial elastic modulus and initial shear modulus can be found by using the obtained profiles of transverse velocities. Necessary depending and examples of the resulting images are also presented in this article. © PNRPU |
| Databáze: | OpenAIRE |
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