Soil - water characteristics and perneability of residual soils in Northern Thailand prone to rain-triggered landslides | |
| Author | Thanapon Wirojarust |
| Call Number | AIT Thesis no.GE-09-07 |
| Subject(s) | Landslides--Thailnd, Northern Soils Thailand, Northern |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering Geotechnical and Geoenvironmental Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GE-09-07 |
| Abstract | Landslides have been one of the frequent geo-hazards affecting the hilly and mountainous terrains of Thailand. Residual soils are weathering products of rocks that are found under unsaturated condition in hilly and mountainous terrains of Thailand. The engineering properties of residual soil depended on the parent rock and the degree of weathering. The properties of the soil water characteristic curve, coefficient of permeability and shear strength of residual soil depend on the ability of a soil to retain water at various negative pore pressures (suction). The result of basic properties, soil water characteristic curve and strength reduction index indicated that large soil particles and pore volumes have several effects on the engineering properties because pore volume and grain size distributions are affected by the degree of weathering and parent rock. The soil water characteristic curve is related to the grain-size distribution of the residual soil. The results show that the air entry value of the drying branch soil water characteristic correlated well with the particle of the soils because fine-grained soils have a larger air-entry value but coarse-grained soil have smaller air-entry values. The result of permeability function from the soil water characteristic indicated that the lower matric suction affected the decrease of the coefficient of permeability. The percent reduction of shear strength of residual soil in Mae Hong Son Province can be 31 % while in Nan Province, the corresponding percent reduction of shear strength can be 26% the reduced rate of shear strength of soil sample in Mae Hong Son and Nan Province depends on the rate of increasing water content |
| Year | 2010 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GE-09-07 |
| 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) | Bergado, Dennes T.; |
| Examination Committee(s) | Noppadol Phien-wej;Park, Kyung-Ho; |
| Scholarship Donor(s) | Royal Thai Government Department of Highways; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2009 |