Soils and Foundations

Soils and Foundations

Volume 42, Issue 2, April 2002, Pages 93-102
Soils and Foundations

Stability Analysis of Drilled Shafts Reinforced Slope

https://doi.org/10.3208/sandf.42.2_93Get rights and content

ABSTRACT

Drilled shafts have been used as an effective means to stabilize a soil slope with marginal safety factor. A limit equilibrium based slope stability analysis technique is presented in this paper that would allow for the determination of the safety factor of the reinforced slope and the forces acting on the drilled shafts. Specifically, the finite element analysis generated load transfer characteristic curves were incorporated into the traditional method of slice approach to account for the soil arching effects. Mathematical formulation of the proposed analysis method is given in detail, followed by validation of the approach with other analysis methods. Examples of the slopes with or without the drilled shafts are given to illustrate the reasonableness of the solution provided by the proposed approach. The efficiency of using drilled shafts to stabilize a slope is discussed by examing the influence of the shaft location, shaft size and spacing on the calculated safety factor. Finally, a practical case involving the use of the proposed approach is presented.

Key words

drilled shafts
slope stabilization
stability analysis (IGC: E6)

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Written discussions on this paper should be submitted before November 1, 2002 to the Japanese Geotechnical Society, Sugayama Bldg. 4F, Randa Awaji-cho 2-23, Chiyoda-ku, Tokyo 101-0063, Japan. Upon request the closing date may be extended one month.

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