Substitution of sand ditch system method on vacuum preloading (study case: Land preparation project in Kalimantan)

Vacuum Preloading is considered as an efficient method in soil improvement. It complemented by the implementation of horizontal drain work, namely Sand Ditch System and Hand Type Connector. Decision making application these methods must be adjusted to actual needs conditions project. This research was conducted improvement projects Kalimantan which originally planned use System. However, difficulties were found finding sand a media for draining water. Consequently, substitution carried out The purpose this study indicate that Connector Method more effective terms cost time compared required are respectively Rp 56.095,00/m 2 194 days. Meanwhile, costs 37.250,00/m 183 Therefore, project can save 33,59% 5,67%.