Analisis Perbandingan Karakteristik penurunan dengan Metode analitik, numerik dan monitoring Lapangan pada Perbaikan Tanah dengan Sistem Preloading Dikombinasikan PVD pada Area Bore Hole II Apron Bandara Kuala Namu

Abstract

Bore Hole II is located on the south side apron of the airport Kualanamu that built on sediment land with a historical normal conditions land. Which is conditions is resulting to the soil charaeter with a low carrying eapacity and high cornpressibility. It has been a big trouble in the construct of infrastructure construction for the airplane, and necessary to do repairs for that. The repair method of soil improvement preloading combined with Prefubrtcated vertical drain (PVD) was an alternative that used in the construction of apron at Kualanamu airport. In predtcting the characteristics of the decline due to the method aboved can be performed by various methods such as analytical method by considering Darcy's lqw eyent unconsidering Darcy's law and use numerical Jinik element method till to the using the Plmis program. From the results above, it is found that the degree of consolidation from Darcy method had a consolidation degree bias is around 8ok, bias settlement is around 83% and the pressure excess pore water with a bias of 88?6, at 154th doys of the cansoltdation process when ever was compared with the actual conditions obtained from the monitoring result. Next, with nan-Darcy method had q consolidation degree bias is aroundfrom l4o/o, settlement of bias is around 47ok and the pressute excess water pore with a bias of 2% at l54th days of the consoltdation process when compared with the qctual conditions was obtained from monitoring results. And in the end with a numerical method will produce a degree of consolidation with a bias is around 7%, settlement bias is around 7994 and the pressure excess water pore of bias was 24%o at the 154th days the consolidation process when compared with the actuol conditiow obtainedfrom monitortng results. From the results of the assessment of the subject matter above was the use of numerical methods will be more ffictive and fficient to be used to prediction the characteristics of a settlement. Whenever it's used, it required Poisson number and modulus elastictty of the soil data in addition of parameters common soil investigation data especially.