Comparison of the accuracy of heave prediction methods using oedometer test data for expansive soil | |
| Author | Moe Thu Rein Phyo |
| Call Number | AIT Thesis no.GE-19-10 |
| Subject(s) | Soil mechanics Swelling soils Soil dynamics |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Geotechnical and Earth Resources Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | Expansive soil is one of the problematic soils that change in volume under the flocculation of natural water content due to seasonal variations. It means that the increase in the soil moisture content is the main reason for the expansion of the soil. The construction and design for infrastructures on expansive soil present a significant safety issue to a geotechnical engineer. Therefore, the majority of geotechnical engineers had conducted various heave prediction methods to solve the challenges in expansive soil over the past several decades. This study investigated the accuracy of heave prediction methods by evaluating five heave prediction methods based on oedometer test data and laboratory soil column model test change in degree of saturation. Each prediction method based on their own parameter, which is important to predict free heave. These are the percent swell, swelling pressure of consolidation-swell test, swelling pressure of constant volume test, swell index of consolidation-swell test and constant volume test, the relationship between percent swell and consolidation-swell test swelling pressure and the relationship of percent swell and constant volume swelling pressure. The soil used in this study was a 1:1 ratio of sand and sodium bentonite mixture. The index properties of soil test, the constant volume test and the consolidation swelling test was conducted following ASTM standers. It was noted that soil with lower initial degree of saturation had a higher swelling rate than soil with higher degree of saturation. Moreover, the Department of US Army (1983) and Nelson and Chao (2014) methods approximated the closest heave value of the laboratory soil column model test for both degrees of saturation in fully wetted conditions. Futhermore, Thompson (1997) and Nelson and Miller (1992) methods could be considered as the accuracy heave prediction methods for both degrees of saturation in partial degree of saturation. |
| Year | 2020 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical Engineering (GE) |
| Chairperson(s) | Chao, Kuo-Chieh; |
| Examination Committee(s) | Noppadol Phien-wej;Pham Huy Giao; |
| Scholarship Donor(s) | Asian Institute of Technology Fellowship; |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 2020 |