ABSTRACT
The soft Bangkok clay has been well known for high water content, low shear strength, and high compressibility, to geotechnical engineers. For constructing highway embankment on the soft Bangkok clay, the main geotechnical concerns are excess settlement and potential stability failure. The soft Bangkok clay layer along highway route is about 8 to 15 meters in thickness. Soil profile along the new Bangkok-Chonburi highway alignment can be classified to four layers as follows: weathered crust, soft clay, medium stiff clay, and stiff clay, respectively. One of the design criteria of highway embankment design on soft clay is to evaluate the stability of the highway embankment. Reliability-based methodology can be used as the more rational and consistent approach in stead of the deterministic analysis in the assessment the potential slope failure for highway embankment in Bangkok clays.
