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All Journal Reviews in Civil Engineering Scripta Technica: Journal of Engineering and Applied Technology
Lisa Fitriyana
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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PENGARUH FELDSPAR DAN AMPAS TEBU TERHADAP PROPERTIS TANAH EKSPANSIF Selvia Agustina; Lisa Fitriyana
Reviews in Civil Engineering Vol 3, No 1 (2019): Reviews in Civil Engineering
Publisher : Universitas Tidar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31002/rice.v3i1.1259

Abstract

Salah satu upaya perbaikan tanah ekspansif adalah dengan stabilisasi, yaitu mencampurkan tanah dengan semen. Namun penggunaan semen memerlukan biaya besar. Oleh sebab itu, perlu pengganti semen. Pada penelitian ini, semen diganti dengan feldspar dan ampas tebu. Tujuannya adalah mengetahui pengaruh karakteristik tanah ekspansif setelah dicampur dengan feldspar dan ampas tebu, serta mengetahui campuran yang lebih baik dalam stabilisasi tanah ekspansif.Penelitian ini menggunakan feldspar dan ampas tebu dengan kadar campuran 5%, 10%, dan 15%. Propertis tanah ekspansif yang dimodifikasi ditinjau dari pengujian atterberg limit dan direct shear. Hasil dari pengujian tersebut berupa indeks plastisitas (PI), liquid limit (LL), shrinkage limit (SL), kohesi (c), dan sudut geser dalam (j) dari campuran tanah.Hasil menunjukan bahwa karakteristik tanah ekspansif yang dicampur dengan feldspar dan ampas tebu mengalami penurunan indeks plastisitas (PI) dan kohesi (c) sedangkan sudut geser dalamnya (j) semakin tinggi. Campuran yang paling baik adalah menggunakan feldspar dengan kadar 15%.
Stabilisasi Tanah Lunak Menggunakan Campuran Ferronickle Slag dan Alkali Soma Shaki Hadi Nugraha; Dzulfikar Sani; Lisa Fitriyana; Juny Andry Sulistyo
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/vrm3vy68

Abstract

The Kendal Industrial Park (KIK), Central Java, is characterized by soft clay soil with low bearing capacity, requiring improvement before being used as a construction foundation. This study aims to determine soil classification, analyze the effect of ferronickel slag and alkali (NaOH and KOH) mixtures, and evaluate the potential of these mixtures as soil stabilization materials. The research was conducted experimentally in the laboratory through specific gravity tests, grain size distribution analysis, Atterberg limits, Standard Proctor compaction test, direct shear test, and California Bearing Ratio (CBR) test. The mixture variations used consisted of 10% ferronickel slag combined with alkali solutions of NaOH and KOH at concentrations of 6%, 8%, and 10%. The results showed that the original soil was classified as fine-grained soil with high plasticity and a CBR value of 5.6%, indicating low bearing capacity. The addition of ferronickel slag and alkali reduced soil plasticity and increased soil strength and bearing capacity. Therefore, the mixture of ferronickel slag and alkali has the potential to be used as an environmentally friendly alternative soil stabilization material.  
Perencanaan Ulang Struktur Bawah Gedung dengan Fondasi Tiang Pancang: Studi Kasus Proyek Pembangunan Rumah Susun Pekerja Industri Batang III JTGRSN21-03 Abimanyu Wahyu P.S.P.; Adi Prasetyo Pambudi; Soedarsono Soedarsono; Lisa Fitriyana
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: 10.65310/715f1x10

Abstract

Pile foundations play an important role in ensuring the stability of multi storey buildings subjected to axial loads, lateral loads, and moments. In the Batang III Industrial Worker Housing Project (JTGRSN21-03), the original foundation system used bored piles. This study redesigns the foundation into spun piles with a diameter of 0.80 m and a length of 12 m under the same soil conditions and loads. The research methodology was conducted through analysis of three foundation joints. Axial bearing capacity was evaluated using the Meyerhof method, resulting in a tip resistance of 946.00 kN, skin friction resistance of 2,970.37 kN, ultimate bearing capacity of 3,916.37 kN, and allowable bearing capacity of 1,305.46 kN. Lateral bearing capacity was analyzed using the Broms method with an allowable capacity of 162.0 kN. Group pile bearing capacity was determined using the Converse Labarre method. Settlement analysis using the Vesic method showed a single pile settlement of 22.69 mm and group settlements of 50.2 mm at joint 599, 41.8 mm at joint 628, and 21.0 mm at joint 371. Plaxis analysis produced smaller settlements of 13.94 mm, 13.44 mm, and 9.19 mm. The pile cap and shear wall design is considered safe.  
Evaluasi Kinerja Penanggulangan Kelongsoran Lereng pada Timbunan Tinggi Menggunakan Bronjong Berbasis Analisis Plaxis V24.3.0: Studi Kasus Candisari, Kota Semarang Nazala Trisnadyani; Nur Mukti Afiatillah; Lisa Fitriyana
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: 10.65310/4kj9y876

Abstract

This study evaluates the performance of gabion reinforcement in mitigating slope failure on a high embankment slope in Candisari, Semarang City, using finite element analysis based on PLAXIS V24.3.0. The research integrates field observations, laboratory geotechnical testing, and numerical simulation to investigate slope deformation behavior, safety factor characteristics, and hydro mechanical responses under varying groundwater conditions. The numerical model was developed using plane strain analysis with staged construction procedures and strength reduction factor methods to represent actual field conditions. The results indicate that the unreinforced slope experienced significant deformation and a critical safety factor associated with progressive failure mechanisms. The installation of gabion structures improved slope stability by reducing horizontal and vertical displacement, redistributing effective stress, and shifting the slip surface away from the critical zone. Variations in groundwater level significantly affected slope performance through increased pore water pressure and reduced effective stress conditions. The study confirms that gabion reinforcement provides effective structural resistance for high embankment slopes, although hydraulic sensitivity remains a controlling factor in long term stability performance.  
Co-Authors Abimanyu Wahyu P.S.P. Adi Prasetyo Pambudi Dzulfikar Sani Juny Andry Sulistyo Nazala Trisnadyani Nur Mukti Afiatillah Selvia Agustina Soedarsono Soedarsono Soma Shaki Hadi Nugraha