Advertisement

Rock Mechanics and Rock Engineering

, Volume 18, Issue 1, pp 1–15 | Cite as

Analyses of disking phenomenon and stress field in the region of an underground powerhouse

  • Weishen Zhu
  • Guangyu Li
  • Kejun Wang
Article

Summary

The large underground power chambers of Ertan Hydropower Station will be built near the abutment on the left bank in a region with high initial stresses. In this paper, a statistical analysis is presented for the phenomenon of core disking in the dam site. On the basis of a number of stress measurements, the region of the river valley could be divided into three different geostress zones. It is shown that there exists a rather high horizontal stress of up to 30 MPa, and even over 60 MPa at the bottom of the river bed. A least square method has been introduced to get a continuous field of stress, which approximates the variable measured stress data.

Keywords

Civil Engineer Stress Field River Valley Initial Stress Measured Stress 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. Bai, S., Li, G. (1982): Stress Measurement of Rock Mass in Situ and the Law of Stress Distribution in a Large Dam Site. Issues in Rock Mechanics, 23rd Symp. on Rock Mechanics, U. S. A.Google Scholar
  2. Bai, S., Zhu, W., Wang, K. (1983): Some Rock Mechanics Problems Related to a Large Underground Power Station in a Region with High Rock Stresses. Proc., 5th Int. Congress on Rock Mechanics, Melbourne. D. 271, Australia.Google Scholar
  3. Durelli, A. J., Obert, L., Parks, V. J. (1968): Stress Required to Initiate Core Disking. Trans SME, Vol. 241. Sept.Google Scholar
  4. Hast, N. (1967): The State of Stresses in the Upper Parts of the Earth's Crust. Engineering Geology,4 (no. 1).Google Scholar
  5. Leeman, E. R. (1966): The Determination of the Complete State of Stress in Rock in a Single Borehole-Laboratory and Underground Measurements. C. S. I. R., Report. 538. Pretoria, South Africa.Google Scholar
  6. Obert, L., Stephenson, D. E. (1965): Stress Conditions Under which Core Disking Occurs. Trans. SME, Vol. 232. Sept.Google Scholar
  7. Shi, J. (1979): Brittle Fracture of Rock at High Stress Region. Interior Report of Inst. of Power Survey and Design, Chengdu.Google Scholar
  8. Stacey, T. R. (1982): Contribution to the Mechanism of Core Disking. J. S. Afr. Inst. Min. Metall.82 (no. 9).Google Scholar
  9. Sugawara, K., Kameoka, Y., Saito, T., Oka, Y., Hiramatsu, Y. (1978): A Study on Core Discing of Rock. J. Min. Inst. of Japan94, 1089 (78-11).Google Scholar
  10. Zhu, W., Wang, K., Peng, G. (1984): The Stability of Underground Power Chambers in Brittle Rock. Int. Conf. Case Histores in Geotechnical Engineering. St. Louis, MO, U. S. A.Google Scholar

Copyright information

© Springer-Verlag 1985

Authors and Affiliations

  • Weishen Zhu
    • 1
  • Guangyu Li
    • 1
  • Kejun Wang
    • 1
  1. 1.Institute of Rock and Soil MechanicsAcademic SinicaWuhanChina

Personalised recommendations