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- Title
Estimating the properties of weathered bedrock and pilerock interaction from the geological strength index.
- Authors
Zhou, Chun-Mei; Shao, Wei; Yin, Kun-Long; Yang, Zong-Ji
- Abstract
The effect of variable rock mass properties on pile-rock interaction poses a great challenge to the design of stabilizing piles and numerical analysis of pile-rock interaction. The paper presents a novel method to estimate the properties of weathered bedrock, which can be applied to routine design of landslide-stabilizing piles for collivial landslides. The Ercengyan landslide located in the Three Gorges Reservoir, China, is the area of interest for this study. A geological investigation and triaxial tests were conducted to estimate the basic parameters, including Geological Strength Index (GSI), uniaxial compressive strength σci and Hoek-Brown constant mi of intact bedrock in the study area. Hoek-Brown criterion was used to estimate mechanical properties of the weathered rock, including elastic modulus Em, cohesion c, friction angle Φ, and normal ultimate lateral resistance pmax. A parametric study was performed to evaluate the effect of parameterizations of GSI, σci and mi on the bedrock properties and p-y curves. The estimated rock mass properties were used with PLAXIS 2D software to simulate pile-rock interaction. Effect of GSI on stress at the pile-rock interface and in the rock, pile bending moment, pile shear force, and p-y curve were analysed.
- Subjects
BORED piles; LANDSLIDES; WEATHERING; ELASTIC modulus; ROCK slopes; PREVENTION
- Publication
Journal of Mountain Science, 2018, Vol 15, Issue 8, p1757
- ISSN
1672-6316
- Publication type
Article
- DOI
10.1007/s11629-017-4576-8