GAO Yan-bin, GUO Yong-fa, YE Guan-bao. Polygonal line strength equation of soft soil and its application considering soil structure[J]. 2011, 32(7).DOI:
Strength increment of soft soil of a real project in Shanghai is studied. Strength parameters of polygonal line equation which considering the effect of soil structure and linear equation which didn’t consider soil structure are obtained by direct shear test and triaxial test. Shear strength increment is calculated with these parameters by the two methods
and compared with the field results obtained by vane shear test. Because of soil structure
strength increment calculated by linear equation is greater than that by the polygonal line equation. When using polygonal line equation to predict soil strength
the result is more close to result of vane shear test. And it is suggested that the strength parameters should be obtained by triaxial test