| Author | Mongkol Lukmuang |
| Call Number | AIT Thesis no.GE-02-03 |
| Subject(s) | Landslides
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of
Science, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GE-02-03 |
| Abstract | Thailand had been suffering from landslides and debris flow for long time. In the
year 2002, heavy rainfall during August and September had caused flash floods and in 49
provinces in the North, Northwest, Northeast, Central Plains and East of Thailand.
The study is focused on landslides, which occurred in Phu Rua and Wang
Saphuang district, Loei Province, the NE-Thailand and at the Refugee camp in Mae
Sariang district, Mae Hong Son Province in the NW-Thailand during August to September
2002. Ninety-seven people were reported killed.
The Mesozoic of Khorat Group, which comprises sub-horizontally red bedded
elastic sedimentary rocks, builds up the Loei area affected by landslides and the Mae
Sariang area is built up by Permian Limestone. The involved geomaterials are residual
soils and completely weathered rock. The sheet-slides occurred in sandy soils (completely
weathered rock), the rotational slides can be found in clayey-silty materials, and colluvium
(clayey gravel).
Rainfall data revealed that the slides occurred after long-lasting rainfalls (600 mm
in 2 months in Phu Rua), which suggest that a complete saturation of the involved soils is
required to cause landsliding in this area.
The detailed study had been carried out the characteristic profiles of natural
landslide sites. The number of thirteen profiles is represented: Seven profiles studied at
Phu Mafuang (MF) area in Phu Rua district. Four profiles were studied at Ban Mak Khang
(MK) area in Wang Saphuang district. The area is subdivided in two sub-regions. Finally,
two profiles were studied at the Refugee camp (RF) area in Mae Sariang district, Mae
Hong Son Province, NW-Thailand. Those are the events in the period of September 2002.
Especially, at the latter area, a debris flow through two refugee camps killing at least 16
people, 30 still missing and 200 refugee shacks destroyed.
A table summary of landslides characteristics in these areas has provided, including
the dimensions of landslides and cross section to estimate the volume of slide and apparent
friction angle ( ~ ).
In the Loei Province both simple to multiple and complex landslides were observed
here and there. The size of the slides varies widely. At the top of the hills where slopes are
steep, mainly shallow translational slides were observed. Complex and multiple rotational
slides were occurred at downhills. Slight up heave and sand extrusions were found at the
base of few rotational slides. Multiple retrogressive slides, small step sliding and tension
cracks were observed frequently. More than 2 m high sliding were observed at number of
places.
In the Mae Hong Son Province, at Karen Refugee Camp detailed investigation at
two landslides sites were carrying out. The complex slide and sheet slide were occurred
down. |
| Year | 2003 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GE-02-03 |
| 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) | Glawe, Ulrich; |
| Examination Committee(s) | Noppadol Phien-wej;Park, Kyung-Ho ; |
| Scholarship Donor(s) | Royal Thai Government (RTG) by
National Science and Technology
Development Agency (NSTDA); |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2003 |