| Author | Patron, Buenaventura C., Jr. |
| Call Number | AIT Thesis no. GT-89-2 |
| Subject(s) | Roads--Embankments
|
| 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-89-02 |
| Abstract | Six slope failures occu1·red at random locations along a 10-km road
embankment adjacent to an irrigation canal. The failure pattern was analyzed
using a reliability-based procedure currently developed. The spatial variability
of undrained strength, the actual variation in embankment geometry and the
varying water level in the canal were considered in the analysis. By analyzing
a pseudo case (i.e. assuming a constant geometry) of the embankment, the
contribution of the mean undrained strength on the actual failure pattern was
assessed independently from the contribution given by the spatial variation of
undrained strength. An analysis using the factor of safety based on
deterministic soil profile defined by the mean undrained strength resulted to a
prediction favoring a reversed failure pattern in the embankment. Using the
probability of failure which incorporates spatial variation of undrained strength
yielded a prediction conforming to the actual failure pattern along the
embankment. Considering the real case, it was revealed that the actual variation
in geometry has favored a failure pattern consistent with the reliability-based
prediction. On the other hand, the actual variation in geometry overshadowed·
the prediction given by deterministic analysis. For the failure section, a back analyzed plane .strain factor of safety equal to 1.03 and an associated probability
of failure equal to O. 77 was found. Using 3-dimensional analysis, the back calculated factor of safety was 1.07 corresponding to a probable width of failure
equal to 214.64 m. Calculations were carried out using 5 percent model error and
a field vane strength correction (based on Aas et al.) equal to 0.65. From the
results, a reliability-based design for the road embankment was recommended. |
| Year | 1990 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GT-89-02 |
| 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) | Bergado, Dennes T. |
| Examination Committee(s) | Honjo, Yusuke ;Rantucci, Giovanni ;Indraratna, Buddhima |
| Scholarship Donor(s) | Deutscher Akademischer Austauschdienst (DAAD)
The Federal Republic of Germany; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1990 |