Vacuum Ppt Soft Soil Conference

7/25/2019 Vacuum Ppt Soft Soil Conference

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BACK GROUND The use of vacuum consolidaion mehod in !ndonesia,

currenly "as #ein$ develo%ed enou$h o overcome he%ro#lems of sof soil. & %o"er %lan %rojec locaed in Muara

'aki, 'ekasi, (es )ava, !ndonesia usin$ a vacuumconsolidaion mehod.

*umerical modelin$ "ih he a#iliy o model sucion%ressure as he e+ec of vacuum %rocess "ere used oanalyze he soil im%rovemen.

The %henomenon of horizonal shrinka$e "ere successfullymodeled, so ha i can e%lain he di+erences inselemen resulin$ from vacuum consolidaion mehod,com%ared o anoher mehod of soil im%rovemen.


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THE SOIL LAYERS

&vera$e eisin$ $round surface is 91.000.

:(; is locaed 0. m #elo" eisin$ $round surface

;ayer


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SOFT SOIL PARAMETERS


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INPUT PARAMETERS


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GENERAL STAGE4 ri%%in$ and sand #ack?ll for %laform

4 !nsall -@D and horizonal draina$es.

4 !nsall $eomem#rane and $eoeile.

4 !nsall vacuum %um%s and kee% he %um%srunnin$ for 3 A 8 monh.

4 'ack?ll for levelin$ and selemen com%ensaion.'ack?llin$ "ork is done durin$ vacuum %rocess.

4 Bnload vacuum %ressure #ased on he selemenmoniorin$ or calculaed consolidaion de$ree #y&saoka mehod.


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Initial PhaseAn initial model was build base on the initial ground water elevation = 0. 0m The maximum negative pressure head = 100 kPa.


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Suction Boundary Condition

H = -8 m


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Suction over Time


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Horizontal Shrinkage


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Compare to RealMeasurement


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Pressure over Time


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Vertical Settlement

The maximum vertical settlement is 1.102 m,it is higher than the model, which is producethe vertical settlement of 0.67 m.


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Lateral DeformationThe lateral deformation due toinclinometer measurement are 6.7 cm atinclinometer 1 and 25.5 cm at inclinometer2 (inward).

The model produce a lower lateraldeformation, which is maximum at 15.0 cm


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Conclusion The numerical model has #een successfully re%resened he

decrease %ressurea%%lied #y vacuum consolidaionmehod, ho"ever he decrease %ressure over ime curvesill no in $ood conformiy, due o he a%%licaion of#oundary condiion .

The numerical model has #een successfully re%resened he%henomenon of horizonal shrinka$e


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Reference :C7TCK!*D7, 2013, :round !m%rovemen For /oal Fired -o"er

aion -o"er -lan ie & Muara 'aki, 'ekasi, (es )ava.

:C7TCK!*D7, 2018, Final @acuum Moniorin$ Record &14R1, /oalFired -o"er aion -o"er -lan ie & Muara 'aki, 'ekasi, (es

)ava.

Karlinasari,R.,Rahardjo,-.-., 2010, Bnsauraed hear ren$h-arameers of Tro%ical @olcanic Residual oils, B*&TBR&TCD7!;, Cduardo C. &lonso, Technical Bniversiy of /aalonia


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THANK YOU FOR YOUR KIND ATTENTION

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Vacuum Ppt Soft Soil Conference