Updating Bearing Capacity – SPT Graphs - Maryland State Highway ...
Updating Bearing Capacity – SPT Graphs - Maryland State Highway ...
Updating Bearing Capacity – SPT Graphs - Maryland State Highway ...
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In the study, soil borings used in the design of the metro subway system were used for makingcomparisons between <strong>SPT</strong> N-values and the shear strength of fine grained soils. The studyconcluded that there is a correlation between the <strong>SPT</strong> N-value and the shear strength of finegrained soils. However, sensitive clays indicate less correlation because of their dependence onmoisture content. From the above information, it is concluded that if no test was performed onthe cohesive soils, the following relationships in Table 2.2 could be used:TABLE 2.2 Relationships Between Shear Strength and N-values for Cohesive SoilsType of ClayHigh plasticity (CH)Medium plasticity (CL)Low plasticity and clayey silt (SC-ML)Cohesion (tsf)c = 0.13 Nc = 0.076 Nc = 0.038 N2-8
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