Adjusting coefficient for seismic bearing capacity ξa
Values of adjusting coefficient for seismic bearing capacity ξa (Tbl. 4.2.3 from GB 50011-2010):
Name and property of the subsoil | ξa |
Rock, dense gravelly soil, dense gravel and coarse and medium coarse sand, clay and silt whose fak ≥ 300 kPa | 1.5 |
Medium and moderate dense gravelly soil, medium dense and moderate dense gravel and coarse and medium coarse sand, dense and medium dense fine and silty sand, clay, silt and firm loess whose 300 kPa ≤ fak < 300 kPa | 1.3 |
Moderate dense fine and silty sand, clay, silt and plastic loess whose 100 kPa ≤ fak < 150 kPa | 1.1 |
Mud, mudy soil, lose sand, miscellaneous fill, newly accumulated loess and soft loess | 1.0 |
Note: In JTJ 004-89, it‛s table 2.2.1 which is similar to the above table.
Values of adjusting coefficient for seismic bearing capacity ξa (Tbl. 5.5.1 from JTS 146-2012):
Subsoil | ξa |
Loose sand, not in liquidation status | 1.0 |
Normal sand soil, not in liquidation status | 1.3 |
Dense gravelly soil and bedrock | 1.5 |