›› 2011, Vol. 32 ›› Issue (7): 2128-2132.

• Geotechnical Engineering • Previous Articles     Next Articles

Polygonal line strength equation of soft soil and its application considering soil structure

GAO Yan-bin1, 2，GUO Yong-fa1, 2，YE Guan-bao1, 2   

  1. 1. Key Laboratory of Geotechnical and Underground Engineering of Education Ministry, Tongji University, Shanghai 200092, China; 2. Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China
  • Received:2009-11-20 Online:2011-07-10 Published:2011-06-30

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Abstract: 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

Key words: soft soil, strength increment, polygonal line strength equation, direct shear test, triaxial test, vane shear test

CLC Number: 

  • TU 447
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