| Author | Liong, Gouw Tjie |
| Call Number | AIT Thesis no.GT-88-11 |
| Subject(s) | Soil stabilization--Indonesia--Sumatra
|
| Note | A thesis submitted in partial fulfilment 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-88-11 |
| Abstract | In this thesis the principle, working procedure and
application of deep compaction techniques, namely: dynamic
compaction, compaction piling and vibroflotation, for ground
improvement and for reducing liquefaction potential in
Sumatra, Indonesia, are reviewed. Five case studies, namely:
three on dynamic compaction , one on vibroflotation, a nd one on
compaction piling are presented. Comparison of t h e above
techniques are also done when two different techniques are
implemented in the same site. The above deep compaction
methods are very good for reducing the liquefaction potential
as well as t h e related effects of reducing the compressibility
a nd increasing the s h ear strength properties of the subsoil.
However, the effectiveness of each method depends on the
subsoil properties. For sand with fines content less than 15%,
vibroflotati on and dynamic compaction effectively improved the
sub soils and reduced t h e liquefaction potential.
vibro flotation yielded more uniform compaction. For sand with
fines in the order of 10 to 40 % wit h coral fragments
(coralline soil), dynamic compaction with 295 tm/m2 energy can
only form about 5 m thick non -liquefiable surface layer.
Deeper, more uniformly compacted non-liquefiable subsoil is
best obtained by compaction piling. The depth of influence of
dynamic compaction is also affected by the energy per drop ,
the cumulative compaction energy , and the base area of the
tamper as well. The enforced settlement induced by dynamic
compaction was found to be a linear f unction of cumulative
compaction energy , at least up to energy levels of 20 0 tm/m2
for sand with less than 15 % fines and 420 t m/m2 for coralline
soil . Statistical analysis show that the degree of improvement
achieved by each compaction method s can be approached by
exponential functions of the pre-compaction sand density.
Beside the soil properties, the comp action procedure a l so
affect the degree of compaction. In compaction piling , the two
phase working method yields more uniform and better compaction
than one phase method . Even though several formula can be used
to design deep compaction work, test trials are important to
determine the best compaction pattern , passes, spacing of
print and cumulative compaction energy . |
| Year | 1989 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GT-88-11 |
| 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 ;
Surachat Sambhandharaksa |
| Scholarship Donor(s) | The government of Netherlands ; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1989 |