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Stability and Deformation Analysis of Failed Embankments Founded on Soft Clays

Hendra Jitno, and Nurly Gofar , (2005) Stability and Deformation Analysis of Failed Embankments Founded on Soft Clays. Malaysian Journal of Civil Engineering, 17 (1). pp. 1-12.

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Official URL: http://web.utm.my/ipasa/images/stories/MJCE/2005/vol_17_no_1/Stability%20and%20Deformation%20Analysis%20of%20Failed%20Embankments%20Founded%20on%20Soft%20Clays.pdf

Affiliations

URS Australia Pty Ltd, Australia
University Teknologi Malaysia, Faculty of Civil Engineering,

Abstract

This paper presents results of stability and deformation analysis of several failed embankment case histories founded on soft clay. Different methods of limit equilibrium analysis (Fellenius, Bishop, Janbu and Spencer) adopted in computer program SLOPE/W were used to calculate the Factor of Safety of each embankment. A continuum approach utilising a finite difference computer program FLAC was also used to calculate the Factor of Safety and study the deformation behaviour of the embankment. The results obtained using both methods were compared with observations. The effect of analysis methods, variation of shear strength parameters of both fill and foundation soils on the Factor of Safety were also discussed. The variation of soil strength is a dominant factor in the slope stability analysis. The limit equilibrium method which satisfies both force and moment equilibrium give better prediction on the stability of the slope.

Kertas kerja ini membincangkan kajian kestabilan cerun dan kajian ubahbentuk daripada beberapa tambakan yang telah gagal dibina di atas lempung lembut. Simulasi dilaksanakan menggunakan perisian computer SLOPE/W yang berasaskan kaedah
keseimbangan batas yang berlainan (Fellenius, Bishop, Janbu dan Spencer) dan FLAC yang berasaskan kaedah perbezaan terhingga. Hasil kajian menggunakan kedua-dua kaedah ini juga dibandingkan dengan hasil pengamatan di tapak. Kesan kaedah kajian, nilai-nilai kekuatan ricih tanah asas dan bahan tambakan terhadap hasil kajian juga dibincangkan. Hasil kajian menunjukkan bahwa nilai kekuatan tanah lebih berpengaruh terhadap faktor keselamatan cerun dibandingkan dengan kaedah yang digunakan. Kaedah yang memenuhi keseimbangan momen dan daya memberi ramalan kestabilan
cerun yang lebih baik.

Item Type:Journal
Additional Information:The first author would like to express his gratitude to URS Australia Pty Ltd for the time given to him to carry out the numerical study
Keywords:Soft Clay, Slope Stability, Embankment Deformations Lempung Lembut, Kestabilan Cerun, Ubahbentuk Tambakan
Subjects:T Technology, Engineering
ID Code:6504

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