Basic properties and compressibility characteristics of the first and second clay layer of Bangkok subsoils | |
| Author | Tasneenart Kerdsuwan |
| Call Number | AIT Thesis no. GT-83-35 |
| Subject(s) | Soil consolidation test Clay soils--Thailand--Bangkok |
| Note | A thesis submitted m partial fulfillment of the requirement for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | The available information on basic properties and compressibility characteristics of the first and second clay layer of Bangkok subsoils were collected from research reports at AIT, government agencies and consulting firms. The variations of the basic properties with depth were obtained and were presented in terms of means, standard deviation and ranges. The Pl-LL relationships for each Layer are presented by the regression lines. It is found that they are almost parallel t o each other by the equations: PI = 0.7q (LL-15.5) Pl = 0.73 (LL-12.0) PI = 0.74 (LL-11.9) for soft, First Stiff and Second Stiff Clays respectively. The effective overburden pressure in Soft Clay and Second Stiff Clay was found to have a linear variation with depth, while in the First Stitf Clay, the polynomial relationship was obtained. A modified compression index was defined and the compressibility characteristics were evaluated using the statistical approach. The compression index were calculated for each stress increment level and was classified according to the effective overburden pressure. In Soft and Weathered Clay, the characteristics is found to be highly- correlated with natural water content and by the relationships: Cc = -0.588 + 0.0217Wn CR = -0.013 + 0.0047Wn The probability distribution of compression ratio in most layer was of found to follow log-normal, except in the sort clay zone where it was found to be normal. The empirical distributions were checked using the Chi-square goodness-of-tit tests at. 5% level of significance. The compression ratio in Second Stitt Clay was found to be equal to or slightly Less than that of First Stiff Clay, but a greater variation is observed. |
| Year | 1984 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical and Transportation Engineering (GT) |
| Chairperson(s) | Bergado, Dennes T. |
| Examination Committee(s) | Balasubramaniam, A.S. ; Yamada, Yasuo |
| Scholarship Donor(s) | Government of Japan |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1984 |