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Trihanyndio Rendy Satrya
Institut Teknologi Sepuluh November, Indonesia
Environmental Science Languange, Linguistic, Communication & Media Public Health Social Sciences

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Analysis of the Effectiveness of Modified Chicken Foot (CAM) in Reducing Pavement Settlement on Embankments on the Trans-Sumatra Toll Road Bagas Dwi Purwantoro; Trihanyndio Rendy Satrya; Ria Asih Aryani Soemitro
Interdisciplinary Social Studies Vol. 5 No. 1 (2025): Regular Issue: October-December 2025
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/iss.v5i1.993

Abstract

The construction of the Trans Sumatra Toll Road (JTTS) Betung – Jambi Section 1B faces challenges due to highly compressible soft soil conditions, which have the potential to cause excessive settlement and embankment stability problems. This study aims to optimize embankment management at STA 43+225 – 43+375 which was initially a 2m replacement by evaluating the effectiveness of Modified Chicken Foot (CAM), combined with variations in replacement depth from 0 to 2 m. The analysis was carried out using the finite element method with the PLAXIS 2D assisted program to compare the performance of consolidation settlement and safety factor ( SF ). The results showed that the application of CAM provided a delay effect ( delaytime ) on the initial settlement rate and significantly reduced the total settlement. The combination of Replacement 2 m + CAM showed optimal performance, suppressing the settlement of 5 m embankment to 0.811 m (reduced by 17% from the alternative without CAM. In addition, the application of CAM was proven to improve stability, with the highest SF value reaching 2,055 on a 3 m embankment without replacement.
Analysis of The Effectiveness of Using Lightweight Materials on Embankments Over Soft Soil (Case Study: Betung Toll Road (SP Sekayu) –Tempino - Jambi Section 1B) Teguh Sakti Muttaqin; Ria Asih Aryani Soemitro; Trihanyndio Rendy Satrya
Interdisciplinary Social Studies Vol. 5 No. 1 (2025): Regular Issue: October-December 2025
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/iss.v5i1.1002

Abstract

The construction of the Betung (SP Sekayu) – Tempino – Jambi Trans Sumatra Toll Road Section 1B, particularly at STA 55+900, faces significant geotechnical challenges due to soft subgrade in the floodplain area. Geotechnical investigations indicate that the surface layer up to a depth of 4.45 meters is dominated by very soft silty clay with an N-SPT value of 2-4, which risks triggering embankment instability and excessive settlement in the planned 6.6-meter high embankment. This study aims to analyze the effectiveness of lightweight fill material in the form of foam mortar as a substitute for conventional embankment materials. Numerical analysis based on the finite element method (Plaxis 2D) was carried out by modeling variations in foam mortar thickness of 25%, 50%, and 75% of the embankment height. The simulation results show that the use of lightweight materials effectively increases stability and reduces settlement. The most optimal design configuration was obtained at a substitution variation of 75% foam mortar, which resulted in a Safety Factor (SF) value of 2.727. This value indicates an 58.64% increase in stability compared to conventional soil embankments and is capable of reducing total settlement by up to 25.26% (by 9.745 cm). These findings recommend foam mortar as an alternative solution that meets the technical criteria for stability and deformation.
Analysis of Behavior of Bridge Pile Foundation Slab on Pile Due to the Construction of a New Pier on Soft Soil Using Analytical Method and Plaxis 2D Erna Novita Wati; Trihanyndio Rendy Satrya; Ria Asih Aryani Soemitro
Interdisciplinary Social Studies Vol. 5 No. 1 (2025): Regular Issue: October-December 2025
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/iss.v5i1.1005

Abstract

ile foundations are a common solution on soft soils with low bearing capacity. However, new construction activity near existing structures has the potential to trigger pile displacement or settlement. This study aims to analyze the performance of existing slab-on-pile foundations at study sites with soft soil up to a depth of 70 m, where the distance between the new foundation and the existing foundation is relatively small. The analysis was carried out through theoretical calculations (Meyerhof and Poulos-Davis methods) and gradual numerical modeling using PLAXIS 2D. The results of axial calculations show an ultimate capacity of kN. The numerical results indicate that the axial force in the existing piles has decreased. Vertical deformation ( ) increases from 3.4 cm to 5.96 cm in the structural phase. The increase in external load causes horizontal deformation ( ) in the backfill phase to reach 29 mm, exceeding the service limit of 25 mm; this lateral deformation then reduces to 18.9 mm in the final phase. In addition, the bending moment in the piles shows a significant increase from 11.18 kNm to 96.82 kNm, indicating the dominance of additional load and changes in soil conditions on the bending response of the piles. These results emphasize the importance of comprehensively evaluating soil-structure interactions under soft soil conditions and narrow distances between foundations.
Co-Authors Bagas Dwi Purwantoro Erna Novita Wati Ria Asih Aryani Soemitro Teguh Sakti Muttaqin