Evaluation of rock slope stability for Yujian River dam site China by block theory analyses

Pinnaduwa Kulatilake, L. Q. Wang, H. M. Tang, Y. Liang

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Lithological information, rock mass fracture data and discontinuity shear strength obtained through field investigations have been used to conduct block theory analyses for the rock slopes that exist in the dam site to evaluate the stability of the slopes. The analyses were performed using mean discontinuity set orientations for each rock mass region under gravitational loading to calculate the maximum safe slope angles (MSSA) for different cut slope directions. The following conclusions have been made based on the block theory analysis results: (1) The final MSSA range between 30° and 47°, 44° and 70°, 47° and 69°for cut slope dip directions of 20°-30°, 105°-210°, and 270°-355°, respectively; (2) For cut slope dip directions of 105°-210° and 270°-355°, wide ranges of values have been obtained for the final MSSA reflecting the influence of variability of fracture orientations on MSSA; (3) Apart from the region R-d-1 for slope dip directions in the range 20°-30°, rest of the regions at the dam site seem to be stable for slope angles less than 40°.

Original languageEnglish (US)
Title of host publication45th US Rock Mechanics / Geomechanics Symposium
StatePublished - 2011
Event45th US Rock Mechanics / Geomechanics Symposium - San Francisco, CA, United States
Duration: Jun 26 2011Jun 29 2011

Other

Other45th US Rock Mechanics / Geomechanics Symposium
CountryUnited States
CitySan Francisco, CA
Period6/26/116/29/11

Fingerprint

dams
Slope stability
slope stability
rivers
slope angle
Dams
China
dam
Rivers
Rocks
rocks
slopes
evaluation
river
rock
dip
discontinuity
Shear strength
fracture orientation
shear strength

Keywords

  • Block theory analysis
  • Dam site
  • Discontinuity shear strength
  • Rock discontinuities
  • Rock slope stability
  • Yujian River

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

Kulatilake, P., Wang, L. Q., Tang, H. M., & Liang, Y. (2011). Evaluation of rock slope stability for Yujian River dam site China by block theory analyses. In 45th US Rock Mechanics / Geomechanics Symposium

Evaluation of rock slope stability for Yujian River dam site China by block theory analyses. / Kulatilake, Pinnaduwa; Wang, L. Q.; Tang, H. M.; Liang, Y.

45th US Rock Mechanics / Geomechanics Symposium. 2011.

Research output: Chapter in Book/Report/Conference proceedingChapter

Kulatilake, P, Wang, LQ, Tang, HM & Liang, Y 2011, Evaluation of rock slope stability for Yujian River dam site China by block theory analyses. in 45th US Rock Mechanics / Geomechanics Symposium. 45th US Rock Mechanics / Geomechanics Symposium, San Francisco, CA, United States, 6/26/11.
Kulatilake P, Wang LQ, Tang HM, Liang Y. Evaluation of rock slope stability for Yujian River dam site China by block theory analyses. In 45th US Rock Mechanics / Geomechanics Symposium. 2011
Kulatilake, Pinnaduwa ; Wang, L. Q. ; Tang, H. M. ; Liang, Y. / Evaluation of rock slope stability for Yujian River dam site China by block theory analyses. 45th US Rock Mechanics / Geomechanics Symposium. 2011.
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