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. 2021 Aug 16;16(8):e0256190. doi: 10.1371/journal.pone.0256190

Table 1. Soil distribution and mechanical properties.

Soil layer Thickness (m) soil depth(m) Saturated bulk density (kN/m3) Compression modulus (MPa) Internal friction angle (°) Cohesion (kPa) Characteristic value of pile side resistance (kPa)
Filled soil layer 3.7–3.8 0–3.8 19 35 30 0 0
Soft soil layer (silt) 14.0–16.0 17.7–19.8 18 (8) 3 5 7 12
Silty clay layer 3.0 20.7–24.6 18 (8) 5 15 15 57
Strongly weathered sandy soil layer 20 41–45 18 (8) 80 45 3 150