Date
01 Jun 1988, 1:00 pm - 5:30 pm
Abstract
The paper presents a case history of performance and analysis of results of vertical & horizontal resonance tests on a standard concrete block in a well, for in-situ determination of dynamic properties of soil required for design of a turbo-generator, under unusual conditions of high water table. Pumping from the two wells constructed for lowering the water level was not enough and pumping from within the main well had to be resorted to bring down the water level to a little below the top surface of the model block. As expected, amplitude versus frequency curves for vertical resonance test showed two resonant peaks instead of one, indicating occurrence of two modes of vibration. A method for estimating dynamic co-efficients of soil, through derived curves for ratio of natural frequencies in horizontal and vertical modes versus effective area of base, has been suggested. A repeat test under good conditions confirmed the adequacy of the method.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
2nd Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 1988 University of Missouri--Rolla, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Miglani, V. D., "In-Situ Determination of Dynamic Properties of Soil for Foundation of a Turbo-Generator" (1988). International Conference on Case Histories in Geotechnical Engineering. 9.
https://scholarsmine.mst.edu/icchge/2icchge/2icchge-session4/9
In-Situ Determination of Dynamic Properties of Soil for Foundation of a Turbo-Generator
The paper presents a case history of performance and analysis of results of vertical & horizontal resonance tests on a standard concrete block in a well, for in-situ determination of dynamic properties of soil required for design of a turbo-generator, under unusual conditions of high water table. Pumping from the two wells constructed for lowering the water level was not enough and pumping from within the main well had to be resorted to bring down the water level to a little below the top surface of the model block. As expected, amplitude versus frequency curves for vertical resonance test showed two resonant peaks instead of one, indicating occurrence of two modes of vibration. A method for estimating dynamic co-efficients of soil, through derived curves for ratio of natural frequencies in horizontal and vertical modes versus effective area of base, has been suggested. A repeat test under good conditions confirmed the adequacy of the method.
