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All Journal Scripta Technica: Journal of Engineering and Applied Technology
Rifqi Brilyant Arief
Universitas Islam Sultan Agung Semarang
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Analisis Daya Dukung dan Penurunan Pondasi Dangkal dan Pondasi Dalam Diatas Tanah Lunak Shobibur Rohman Zen; Muhammad Edy Saputro; Rifqi Brilyant Arief
Journal of Engineering and Applied Technology Vol 2 No 1 (2026): : June: Scripta Technica: Journal of Engineering and Applied Technology
Publisher : CV SCRIPTA INTELEKTUAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65310/x5yesv60

Abstract

Soft soil in the Kaligawe Road area of Semarang is characterized by low bearing capacity and high compressibility, posing significant challenges in foundation planning for buildings. This study analyzes the bearing capacity and primary consolidation settlement of shallow foundations (spread footing) and deep foundations (pile foundation) on soft soil using SPT data from borehole BH-06 up to 60 m depth. Bearing capacity calculations were performed using the Meyerhof (1956) method for shallow foundations and the Meyerhof (1976) method for deep foundations, while primary consolidation settlement was calculated based on Terzaghi's consolidation theory with parameters Cc = 0.334 and e₀ = 1.347–1.410. The results indicate that the bearing capacity of deep foundations increases consistently with depth and pile diameter, with skin friction dominating the total bearing capacity. A settlement comparison at equivalent allowable bearing capacity values shows that shallow foundations produce the largest settlement (average Sc = 0.093 m), followed by deep foundations in a 2×2 configuration (average Sc = 0.063 m), while deep foundations in a 2×1 configuration yield the smallest settlement (average Sc = 0.037 m). Therefore, the 2×1 pile configuration is recommended as the most optimal foundation system for soft soil conditions at the study location.
Analisis Efektivitas Metode Deep Soil Mixing dalam Meningkatkan Stabilitas Tanah Lunak pada Konstruksi Jalan Tol Ababiel Ashabussidiq; Jerrico Naufal Hibban; Rifqi Brilyant Arief; Rinda Karlinasari
Journal of Engineering and Applied Technology Vol 2 No 1 (2026): : June: Scripta Technica: Journal of Engineering and Applied Technology
Publisher : CV SCRIPTA INTELEKTUAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65310/663qz567

Abstract

The construction of toll roads on soft soil frequently encounters geotechnical problems in the form of excessive ground settlement and low embankment stability, which may lead to structural failure if appropriate ground improvement measures are not implemented. Deep Soil Mixing (DSM) is a ground improvement technique in which in-situ soil is mixed with a binding agent to increase shear strength and reduce soil compressibility. This study aims to analyze the effectiveness of the DSM method in improving the stability of soft soil for toll road construction and to evaluate the influence of variations in column spacing and depth on soil deformation and safety factors. The study was conducted as a case study of the Probolinggo–Banyuwangi Toll Road Development Project, Package 2, at STA 16+550–STA 16+600, using analytical approaches and numerical modeling based on the finite element method with PLAXIS 2D software. Analyses were performed for conditions without ground improvement and with DSM improvement using two configurations, namely a column spacing of 1.5 m with a depth of 8 m and a column spacing of 1 m with a depth of 6 m. The results indicate that the application of the DSM method significantly increases the safety factor and reduces soft soil deformation, with a closer column spacing configuration demonstrating more optimal performance in enhancing embankment stability.  
Co-Authors Ababiel Ashabussidiq Jerrico Naufal Hibban Muhammad Edy Saputro Rinda Karlinasari Shobibur Rohman Zen