Engineering properties of loessial soils in Khon Kaen city | |
| Author | Tongchai Pientong |
| Call Number | AIT Thesis no. GT-88-20 |
| Subject(s) | Soils--Testing Loess--Thailand--Khon Kaen |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GT-88-20 |
| Abstract | Loessial soils in rapid growing Khon Kaen City are divided into two types i.e. Red and Yellow Loess which are classified as CL-ML and SM, respectively. On the basis of the natural density ranging from 1. 43 to 1. 57 t/m7 1 and low liquid limit, 12 17 %1 the soils belong to a collapsible type. Deformability and strength characteristics of the soils in natural condition were investigated by means of double oedometer tests, triaxial tests, the plate bearing test and the Standard Penetration test. The results show clearly that the properties of the soils are governed by moisture conditions, i.e. the high shear strength and modulus existing in dry condition are reduced drastically upon wetting. The primary sources of the apparent cohesion increasing the strength of the soils in dry conditions are particles cementing bonds and capillary tension; the effects of both of these can be reduced significantly by water absorption. Triaxial test results show that Red Loess with a degree of saturation above 40 % collapses under an applied pressure higher than 20 t / m2 after which it gains shear strength from densification. The plate load test and double oedometer test results can be used to predict settlement in shallow foundations on the loessial soils whereas the prediction based on triaxial secant modulus tend to over estimate in the low applied pressure range. N- values vary greatly, depending on changes in the water content and they become 2ero when the soils are saturated. |
| Year | 1989 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GT-88-20 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Geotechnical and Transportation Engineering (GT) |
| Chairperson(s) | Noppadol Phien- wej ; |
| Examination Committee(s) | Rantucci, Giovanni ;Kuwano, Jiro |
| Scholarship Donor(s) | The Government of Australia. ; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1989 |