Land Subsidence Induced by the Rate of Consolidation of Marine Clay in Kamal Muara Northern Jakarta

Abstract

The coastal area like Northern Jakarta are developing so fast. This condition will be resulted in land subsidence if soil layers in that area has high compressibility like marine clay layers. Coastal areas of Northern Jakarta generally formed by sedimentary wich are compressible soils. Consolidation is a process of soil compacting due to the compression. Normally consolidated (NC) soil is a type of sedimentary soil that has never experienced a reduction in pressure above it, while over-consolidated (OC) soils are a type of sedimentary soil due to pressure that is much higher than the current pressure. Rate of consolidation is very dependent on compressible parameter. Land subsidence in the coastal area of Northern Jakarta can be estimated by consolidation rate. Therefore, research on the characteristic parameters Cc and Cv compare to plasticity index (PI) of sedimentary soils in the coastal areas of Jakarta needs to be done. This research is conducting by laboratory tests on UDS (undisturbed) soil samples taken by drilling a depth 50 meter point in Kamal Muara area. The method used is the consolidation test for further analysis of the parameters of Cc, and Cv. The result show the land subsidence of marine clay in Kamal Muara Northern Jakarta has a significant correlation with rate of consolidation.