| Author | Chawalit Tanomtin |
| Call Number | AIT Thesis no. GT-78-21 |
| Subject(s) | Landslides--Thailand--Doi Inthanon Highway
|
| Note | A thesis submitted in partial fulfilment of the requirements for the degree of Master of Science, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | The rocks along the Doi Inthanon Highway are gneisses and granites. The rocks were jointed into 4 major regional sets, and are highly weathered from Km. 22 to the top of the mountain. The weathering is divided into 4 grades, slightly, moderately, highly and completely weathered. The highway was completed in June (1975), slump failures of both embankment and cut slopes occurred repeatedly during the rainy seasons, August and September, of 1976-1978. Rock slides and block glide, toppling and rock fall are of minor occurrence. Slump of embankment are of prevalent
type failures. Depth and shape of the slip surfaces are not known. The embankment materials are locally derived silty and sandy soils. Residual soil is about 4 m depth in observed cuts. Weathering reaches a
depth of more than 18 m. Standard penetration test, Iowa bore hole shear test, field cone density and piezometric level measurement were performed
in the field on landslide sites selected to represent the types of failure along the highway. Shear strength parameters of the soil in the slide areas indicate a decreasing trend with depth and that agree to the
increasing trend of natural moisture content. The standard number (N) increase with depth as the natural moisture content decrease downward in highly weathered steeply dipping gneiss. The field cone density of soils in the slides is higher than that of the soils outside the slides. Direct shear test strength of slightly weathered aplitic granite is greater than that of steeply dipping gneiss of the same quarry. The strength of completely weathered aplitic granite is higher than that of completely weathered steeply dipping gneiss. Piezometric levels measured in November-December 1979 did not indicate high pressure of water. |
| Year | 1979 |
| 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) | Campbell, K.V.
|
| Examination Committee(s) | Prinya Nutalaya ;Akagi, Toshinobu |
| Scholarship Donor(s) | Canadian Government |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1979 |
