| dc.description.abstract | The Palembang – Indralaya Toll Road is one of the sections of the Trans Sumatera Toll
Road. This specific section of Trans Sumatera Toll Road knowingly has a very problematic existing
soil conditions namely soft silty clay soil from the soil surface up until 15 m deep. The goal of this
study is to find out whether or not the method used in the project which is the monitoring of
settlement using Settlement Plate is accurate in defining the value of the consolidation by comparing
the data obtained by the settlement plate used in the project (consolidation settlement, consolidation
degree, and soil parameters) with several theoretical analysis namely the analysis of settlement
using Terzaghi’s approach, final soil settlement prediction using Asaoka, as well as soil properties
recalculation using back analysis. Other than that, this study can be used as reference regarding
the implementation of Vacuum Consolidation System literature wise.
In performing all of the analysis of this study regarding the Palembang-Indralaya Toll
road, secondary data is collected from PT. Hutama Karya Infrastruktur. In this research, the
consolidation settlement and consolidation degree analysis is performed using Terzaghi’s approach,
Asaoka method, and back analysis to recalculate the soil parameter and the standards used are
based off of Kementrian Pekerjaan Umum dan Perumahan Rakyat, Badan Pengatur Jalan Tol 2017)
in order to conduct the Vacuum Consolidation Method.
Palembang – Indralaya Toll Road from STA 6+650 – 6+950 has an average actual
settlement of 604 mm, consolidation degree of >90%, and soil parameters pre vacuum consolidation
with Gs of 2.528, sat of 15.14, dry of 8.945, e of1.9835, Cc of 0.53, Cv of 0.0265 m2/day, and Cs of
0.085. After several other analysis namely using Terzaghi’s approach, Asaoka, and back analysis
The results obtained from this research are several comparisons of average actual and theoretical
settlement estimated at around 0.915 m. As for estimation of final soil settlement using Asaoka
observational final soil settlement an average of 0.63 m is obtained, while an average consolidation
degree of settlement plate reading obtained at around 94.4% is obtained while consolidation degree
obtained from vibrating wire piezometer as big as 100% is obtained. While results of back analysis
shows average value of mv as big as 0.00061925, kv of 0.00016125, Ch of 0.016225, Ch/Cv of 0.612,
and value of Cc at around 0.062215. With that said it can be safely assumed that throughout the
whole analysis the soil could settle even more for about several milimeters according to Asaoka
results. | en_US |
