LOAD TRANSFER MECHANISM ON LOAD TRANSFER PLATFORM FOR SOFT SOIL REINFORCEMENT WITH RIGID INCLUSION IN PADANG-SICINCIN TOLL PROJECT
Road structure planning on problematic soils needs concerning of geotechnical hazards to avoid potential failures both during construction and during operational periods. In road embankments on compressible soils, such as silt of clay and organic soils with a very soft to soft consistency, treatm...
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| Format: | Theses |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/71896 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Road structure planning on problematic soils needs concerning of geotechnical
hazards to avoid potential failures both during construction and during operational
periods. In road embankments on compressible soils, such as silt of clay and
organic soils with a very soft to soft consistency, treatment with repair or
strengthening of subgrade must be designed to avoid problems of failure of bearing
capacity and or excessive embankment settlement. One of the methods is the
installation of Rigid Inclusion which is intended to transfer the embankment load
to the competent layer under compressible soil. This study aims to evaluate arching
effects on the Loading Transfer Platform (LTP), investigate stress and strain on
geosynthetics, and forces acting on the LTP layer with analytical calculation
methods, numerical modeling using the PLAXIS 2D program based on the
geotechnical instrumentation. The results of axisymmetric numerical modeling and
readings of the Earth Pressure Cell (EPC) instrumentation show the contours of
the arching effect in the LTP layer. The evaluation of tensile force of the
geosynthetic in the LTP is 2.78 kN from the Vibrating Wire Strain Gauge (VWSG)
instrumentation, 0.875 kN/m from the PLAXIS 2D analysis, is 9.45 kN/m from the
analytical calculation with the Catenary method and 9.47 kN/m with the Parabolic
method. The four analyzes showed quite varied values, where the PLAXIS 2D
analysis results tending to be smaller and analytical calculation results tending to
be larger (conservative) when compared to the instrumentation results. The results
of vertical stress analysis on the LTP layer show that the smallest to highest result
are field instrumentation readings (EPC and Fiber Optic), PLAXIS 2D analysis,
and analytical calculation results. The analysis using PLAXIS 2D resulted in the
efficient design that closed to the actual conditions that occur in the field.
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