To discuss the impact of different geosynthetics combination on the improvement of shallow ultra-soft soil, the effect and reinforced mechanism of geosynthetics are first analyzed. Then,based on a project on shallow ultra-soft soil improvement in Gaolan Seaport Area in Zhuhai Seaport,comparison trials have been conducted, including the combination method 1 of“weaved cloth + geotechnical grille + non-woven fabric”and the combination method 2 of“weaved cloth +two layer of non-woven fabric”. The results show that the 3D permeability of Method 1 is better than Method 2;Method 1 is more beneficial to improving the soft soil; the reinforced effect of Method 2 is better than that of Method 1. Therefore, Method 1 is more advisable for improving shallow ultra-soft soil.
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