Correlations between undisturbed strength deformation characteristics and those developed from SPT | |
| Author | Chairat Thanudklueng |
| Call Number | AIT Thesis no.GT-87-09 |
| Subject(s) | Soil stabilization--Thailand--Bangkok Soil mechanics--Thailand--Bangkok |
| 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-87-09 |
| Abstract | For the first Bangkok sand layer, many empirical correlations which are used to determine engineering properties and strength-deformation characteristics are based on the results of SPT tests and disturbed samples. For more reliable results, the existing empirical correlations should be investigated by comparing the results with those of tests from undisturbed samples. In general, studies show that suitable correlation between N-value and engineering properties requires the consideration of the influence of effective overburden pressure and type of cohesion less soil. In this study, for relative density determination of sand, the correlations proposed by GIBBS & HOLTZ C1957>, COFFMAN C1960), GIULIANI et al. C1982) and MELZER C1971> are shown to be reasonable . Reasonable empirical correlations for the determination of sand compressibility are the correlations proposed by SCHULTZE & MOUSSA C1961), SCHULTZE & MENZENBACH C1961), WEBB C1969) and SCHMERTMANN C1970) . For the angle of internal friction reasonable correlations are the PECK et al. C 1974) and MEYERHOF C 1956) correlations. For the stress-strain behaviour of sand in triaxial tests, test results are based on CID-loading in compression and extension on undisturbed and air-pluviated specimens. This sand shows significant inherent anisotropy. The preparation of samples has an effect, i.e. , air pluviation causes changes in soil structure which leads to the reduction in $ ', E and anisotropic behaviour. The se effects occur in bot h TC and TE, but in the case of TE, are less pronounced. Considering the undisturbed sample behaviour, the magnitude of qc' has an influence on stress-strain-strength characteristics. When qc' increases above qp, the secant modulus of sand at 15% and 50% stress level increase s in both TC and TE tests. The Mohr envelope becomes a curved line when qc' increases, especially when qc' exceeds critical stress. Also when qc' increases, it causes more contraction and less dilation. This behaviour emerges from both TC and TE tests. |
| Year | 1988 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GT-87-09 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Geotechnical and Transportation Engineering (GT) |
| Chairperson(s) | Rantucci, Giovanni ;Surachat Sambhanpharaksa |
| Examination Committee(s) | Prinya Nutalaya ;Noppadol Phien-weja; |
| Scholarship Donor(s) | The government of Japan ; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1988 |