Japanese Method and Taiwanese Method providecomparable results for buttress wall design. The formermight give slightly more advantageous result based on thestudy. For partial base grouting, although equivalentdisplacement method might give more accurate resultcompared to the equivalent properties method, the lattermight be preferred for its simplicity.For excavation in very soft clay, buttress wall tends to beineffective as it moves together with the soil, while partialbase grouting can be a practical and economical solution,especially for narrow excavation.
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