Geotextile material like cloth used for various construction projects in the construction of the use of geotextile vertical drainage system installed to speed up the process of land subsidence . Vertical drainage materials used initially was pole sand , but there are now fabricated materials as a substitute for sand pile , which are coconut fiber geotextile and wrapped in burlap sack that serves as a filter .
This research was carried out by testing the consolidation tool to obtain the coefficient of consolidation Rowe either vertical or horizontal direction by using two materials mentioned above . Tests carried out without giving an additional material as a filter by using soft cohesive soil samples taken from the construction site at a depth of approximately 1.20 m with free strain loading conditions without taking into account the impact of the smear zone .
Consolidation coefficient obtained was then compared to the soil samples without vertical drainage and also compared against each other material . The results of this study indicate that the use of geotextile material and coconut fiber will increase the coefficient of vertical consolidation simply means
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