Engineering geology of the Ban Mae Hoh landslides, northern Thailand | |
| Author | Guo, Win-shan |
| Call Number | AIT Thesis no. 903 |
| Subject(s) | Landslides--Thailand--Ban Mae Hoh Engineering geology--Thailand, Northern |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science of Asian Institute of Technology, Bangkok Thailand. |
| Publisher | Asian Institute of Technology |
| Abstract | The rocks between km 84+700 and 85+000 section along the Hod-Mae Sariang Highway, Northern Thailand consist of crystalline limestone and phyllite which were intruded by the Triassic granite. The rocks were faulted and brecciated along the northeast trending faults and shear zones. Residual soils extensively developed on top of the phyllite. After the highway was cut through the residual soils, slope failures, landslides, and heaving of the road surface occurred repeatedly every rainy season. The X-ray diffraction and atomic absorption spectrophotometric analyses of the soil samples taken along the slopes and from the boreholes revealed that high content of vermiculite and montmorillonite in the clay fraction were present in one landslide area while high percentage of talc was encountered in another. Piezometric levels of ground water and in-situ shear strengths of the soils were measured together with its permeability. The swelling of vermiculite and montmorillonite under saturated conditions during heavy rainfalls were responsible for the heaving of the road surface in the northeast landslide area. Percolation of water along the cracks and crevices of the weathered talc phyllite lubricated the slip planes and thus induced the mass movement in the northwest landslide. In the southeast landslide area limiting equilibrium condition was attained (safety factor = 0.95) but during the rainy season substantial water pressure developed at the toe of the slope and thus reduced the safety factor. |
| Year | 1976 |
| Type | Thesis |
| School | Student Research Before 1980 |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Thesis (Year <=1979) |
| Chairperson(s) | Prinya Nutalaya ; Brenner, R.P. |
| Examination Committee(s) | Brand, E.W. |
| Scholarship Donor(s) | The Asian Institute of Technology |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1976 |