Stress-strain behaviour and strength characteristics of weathered Nong Ngoo Hao clay | |
| Author | Hwang, Zue-ming |
| Call Number | AIT Thesis no. 764 |
| Subject(s) | Strains and stresses Shear strength of soils Clay--Thailand--Nong Ngoo Hao |
| Note | A thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering at the Asian Institute of Technology, Bangkok, Thailand . |
| Publisher | Asian Institute of Technology |
| Abstract | The stress-strain behaviour and strength characteristics of Weathered Nong Ngoo Hao Clay as tested in the triaxial apparatus under different applied stress paths are presented in this dissertation. Undisturbed samples were taken from depths of approximately 2.5 m to 3.0 m below the ground surface. Stress-controlled triaxial tests were conducted in the equipment wherein piston friction is reduced to a minimum by rotating the bushing. The testing programmed included: (i) Anisotropic consolidation tests (AC tests) (ii) Consolidated undrained tests (CNIU and COIU), and (iii) Consolidated Drained tests (CNID and COID). The anisotropic consolidation tests were used to establish a volumetric yield locus and also the data from the strain ratio was used in the prediction of strains from the Incremental Stress-strain theory. Consolidated undrained tests were carried out on (a) natural weathered clay consolidated to isotropic stresses less than the maximum past pressure, (b) on natural clay consolidated to pressures higher than the maximum past pressure and (c) on natural clay consolidated to 60 psi and then swollen back to different over consolidated ratio. Consolidated drained tests were conducted on Weathered Clay both at consolidation pressure less than and greater than the maximum past pressure. The stress-strain behaviour obtained from these tests are also compared with the corresponding tests conducted on Weathered Clay under extension conditions. Also comparisons are made between the behaviour of Soft Clay and the behaviour of Weathered Clay sheared from pre-shear consolidation pressures higher than the maximum past pressure. The experimentally observed strains are compared with the predictions from various stress-strain theories. |
| Year | 1975 |
| Type | Thesis |
| School | Student Research Before 1980 |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Thesis (Year <=1979) |
| Chairperson(s) | Balasubramaniam, A.S. |
| Examination Committee(s) | Richardson, A.M. ;Brenner, R.P. |
| Scholarship Donor(s) | Asian Institute of Technology |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 1975 |