INVESTIGATION OF SLURRY SUPPORTED TRENCH STABILITY UNDER SEISMIC CONDITION IN PURELY COHESIVE SOILS

An-Jui Li ； Alieu Jagne ； Horn-Da Lin ； Fu-Kuo Huang

《Journal of GeoEngineering》 15卷4期 (2020/12) Pp. 195-203

https://doi.org/10.6310/jog.202012_15(4).3

摘要

For city development, more and more tall apartments and office buildings are being built with basements that require slurry supported trenches to construct diaphragm wall. In the past, some investigators have studied the stability problem of trenches. It was indicated that the trench stability analysis is a three dimensional problem due to arching effect from the finite length of the trenches. However, it is not common to account for the seismic stability analysis of trenches. This study therefore aims to conduct research on the stability of slurry supported trenches under seismic conditions. In this study, finite-element upper and lower bound limit analysis methods (LA) are used to study the stability of trenches under bentonite pressure in purely cohesive clay by considering seismic conditions and to produce stability charts to be used for preliminary designs by engineers.

關鍵字

Finite-element limit analysis ； slurry trenches ； seismic coefficient ； plastic zone