Ko-consolidated vane testing | |
| Author | Chan, Lo Chong |
| Call Number | AIT Thesis no.GT-92-13 |
| Subject(s) | Vane shear tests Shear strength of soils--Testing |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GT-92-13 |
| Abstract | Triaxial vane apparatus is used to investigate the effects of confining stress, size of vane on the undrained shear strength of cohesive soils. The strength anisotropy of the soil is also studied by means of miniature vanes with different configurations. A number of triaxial vane Recompression tests were conducted on Bangkok clay samples taken from depths of 2.5m to 7.5m using the conventional shape of vane. The results from these tests are compared with the field vane results as well as conventional laboratory vane test results, to quantify the effects of consolidation stresses and size effects. The undrained shear strengths from the triaxial vane tests are found to be higher than those from the field vane and conventional laboratory vane tests. The differences are in the range of 16% to 108% and 23% to 53% respectively. It is also found that the undrained shear strengths from the triaxial vane tests are 27 to 58% higher than that from CKoUC tests and 20 to 41% higher than that from CKoUE tests. Two series of triaxial vane tests are performed on the Bangkok clay obtained from a depth of 4.5 m but varying the geometries of the vane. The results obtained are analyzed using two approaches: conventional strength approach and progressive failure approach. The latter approach uses the results from the direct shear tests to predict the anisotropic behavior of Bangkok clay. The values of undrained shear strength anisotropy are found to be different under the two different approaches and it shows that the strength considering the progressive failure is conservative compared to the conventional assumption. |
| Year | 1993 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GT-92-13 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical and Transportation Engineering (GT) |
| Chairperson(s) | Tian Ho Seah; |
| Examination Committee(s) | Balasubramaniam, A.S.;Noppadol Phien-Wej;Honjo, Yusuke; |
| Scholarship Donor(s) | Government of Japan; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1993 |