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Table 1 Characteristic of the stratums in construction site

From: The deformation of retaining piles and ground surface under various support systems during deep excavation

Stratum Thickness (m) Average thickness (m) Characteristics description
Miscellaneous fill 2.00~4.50 2.97 Variegated in color, and with loose structure.
Silty clay 0.70~3.40 1.87 Brownish yellow in color, and in soft-plastic state.
Fill 4.60~7.20 5.73 Grey in color, and in soft-plastic state.
Clay 0.70~3.00 1.65 Yellow in color, and in hard-plastic state.
Clay with lime concretion 1.90~3.20 2.74 Brownish yellow in color, and in-hard plastic state. Particle size of lime concretion is 0.50~5.00 cm.
-1 Clay 4.20~7.30 5.39 Brownish yellow in color, and in-hard plastic state.
Sandstone 4.60~7.20 6.16 Purple in color, and strongly weathered.
-11 Limestone 4.00~7.10 5.00 Grey in color, and slightly weathered.