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008			301198s1989 th r 0000|00eng d
035			_a.b1018496x
099		9	_aAIT Thesis no.GT-88-11
100	1		_aLiong, Gouw Tjie
245	1	0	_aDeep compaction for ground improvement and for reduction of liquefaction potential in Sumatra, Indonesia
260			_aBangkok : _bAsian Institute of Technology, _c1989
300			_a189 p.
490	1		_aThesis ; _vno. GT-88-11
500			_aA thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering, School of Engineering and Technology
502			_aThesis (M.Eng.) - Asian Institute of Technology, 1989
520			_aIn 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 .
650		0	_aSoil stabilization _xIndonesia _xSumatra
700	1		_aBergado, Dennes T., _eChairperson
700	1		_aBalasubramaniam, A.S., _eExamination Committee
700	0		_aNoppadol Phien-Wej, _eExamination Committee
700	0		_aSurachat Sambhandharaksa, _eExamination Committee
710	2		_aThe government of Netherlands, _eScholarship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. GT-88-11
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B18039
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