| Author | Hardiyatmo, Hary Christady |
| Call Number | AIT Thesis no.GT-89-09 |
| Subject(s) | Clay--Thailand--Bangkok
|
| 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-89-09 |
| Abstract | The study of field behaviour of mechanically stabilized
embankment was carried out on a fully instrumented welded wire
reinforced embankment constructed on soft clay foundation a t
Asian Institute of Technology Campus. Th e reinforced wall
consist of vertical welded wire mesh facing on one side, and a
sloping, unreinforced opposites ide with the h e ight of 6
meters. Settlement, earth pressure, pore pressure , lateral
movement of subsoil and tension in the longitudinal wire
reinforcements were monitored during and after the
construction. Laboratory and insitu tests of sub soil foundation
were carried out. Direct shear tests a nd pullout test s o n the
wire mat reinforcements were performed using weathered clay
backfill. Comparison between the results of field a nd
laboratory pullout tests were analyzed. Direct shear tests were
performed to obtain the adhesion factor between weathered clay
fill and welded wire reinforcements. The adhesion factor of
less than one was obtained. By observing the lateral movements
and settlements , it was found that excessive differential
settlement caused the wall rotates about the base at vertical
face reinforced side. This lead to the development of higher
strain in the longitudinal bars. The locus of maximum tensile
forces which constitutes a potential failure surface for the
welded wire reinfor6ed embankment is close to the COULOMB
failure plane. Settlement was analyzed from oedometer and
screw plate tests a nd was d one by various methods . A total
settlement of 93 c m was observed on the day 228 after
construction. Settlement predictions were d o ne by using one dimensional TERZAGHI (19 47 ) , three- dimensional S KEMPTON a nd
BJERRUM ( 1 957) , AS AOKA ( 19 78 ) and POULOS a nd DA VI S C 196 8 )
methods . It was found that the predicted settlement higher
than that observed. Lateral displacement was analyze d by
applying a met h o d suggest e d by TAVENAS et. a l ( 1979) . The
calculated lateral displace mentis fairly in agreement with
observed. The external and internal stability of reinforced
earth wall was analyzed. A factor of safety against bearing
ca pa c it y failure of 1. 2 was found, while factor o f safety
against t e n s ion failure a nd pullout failure of 2 . 1 and 5 . 5
were obtained , respectively. Analysis of stability us in g
results of tri axial unconsolidated - undrained tests and screw
plate tests were also carried out. The minimum factor of safety
of 1 . 2 was obtained. |
| Year | 1990 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GT-89-09 |
| 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) | Balasubramaniam, A.S. ;Noppadol Phien- wej ; |
| Scholarship Donor(s) | US-ASEAN ; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1990 |