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All Journal Teras Jurnal RACIC : Rab Construction Research Borneo Engineering: Jurnal Teknik Sipil
Syahidus Syuhada
Institut Teknologi Sumatera
Civil Engineering, Building, Construction & Architecture Engineering Environmental Science

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ANALISIS HASIL PENGUJIAN DCP DAN CPT SEBAGAI PENENTUAN PARAMETER KUAT GESER TANAH BANDARA SULTAN THAHA Syahidus Syuhada; Puspa Ningrum; Fauzi Buldan Yaumun
Racic : Rab Construction Research Vol. 9 No. 2 (2024): DESEMBER
Publisher : LPPM Universitas Abdurrab

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36341/racic.v9i2.5424

Abstract

Soil shear strength is an important component in infrastructure design. Many tests can be carried out to determine the shear strength of soil. The Cone Penetration Test (CPT) is a test commonly carried out to predict the shear strength of soil. Dynamic Cone Penetrometer (DCP) is often used to predict the value of soil shear strength in the form of the California Bearing Ratio (CBR) to determine the thickness of highway pavement. The shear strength of clay soil for building design purposes is usually expressed in undrained cohesion (cu) which can be obtained from CPT testing. With DCP and CPT tests carried out at the same location, the relationship between the shear strength parameters from these tests will be obtained. The results obtained were CBR = 0.2504 qc(kg/cm2) and cu (kPa) = 14.455 CBR (%). It is hoped that these results will be a rough estimate for road pavement design because DCP testing is limited in its use (only 1 m subgrade depth).
STUDI PARAMETRIK PERKUATAN GALIAN DALAM PADA TANAH LEMPUNG MENGGUNAKAN DINDING DIAFRAGMA DAN SECANT PILE Ayu Sinta Aprilia; Rahmat Kurniawan; Syahidus Syuhada; Try Lestari Sihotang; Ahmad Auliadi Yufrizal; Puspa Ningrum
Racic : Rab Construction Research Vol. 11 No. 1 (2026): JUNI
Publisher : LPPM Universitas Abdurrab

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36341/racic.v11i1.7694

Abstract

The selection of deep excavation retaining systems in Indonesian clay soils is commonly performed based on practical experience without systematic parametric guidance. This study develops selection criteria between diaphragm walls and secant piles through a comprehensive parametric study using the finite element method. A total of 216 numerical models were simulated using Optum G2 software, varying wall type (diaphragm wall and secant pile), excavation depth (4, 8, and 12 m), groundwater table position, building surcharge load (25 kN/m), soil type (soft clay with N-SPT = 4 and stiff clay with N-SPT = 15), and constitutive model (Mohr-Coulomb and Hardening Soil). Results demonstrate that the Hardening Soil model produces 30–39% lower deformations compared to Mohr-Coulomb. Secant piles proved more cost-efficient across all 216 scenarios analyzed, achieving up to 50% cost savings for shallow excavations under low-risk conditions. The most influential parameters on wall performance are, in order: soil type, excavation depth, groundwater table position, constitutive model, surcharge load, and wall type. The resulting design charts and decision matrices serve as preliminary design tools within the SNI 8460-2017 framework.
Analisis Pengaruh Kuat Tarik Geosintetik Pada Perkuatan Tanah Lunak Metode Geosynthetic Encased Stone Columns (GESC) Julita Hayati; Syahidus Syuhada; Celvin Shahroni
Borneo Engineering: Jurnal Teknik Sipil Volume 9 Nomor 1 Tahun 2025
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v9i1.32

Abstract

Infrastructure development must consider soil conditions to avoid settlement and bearing capacity failure. This problem can occur if construction is carried out on soft soil due to the nature of soft soil, which has low load-bearing capacity and high compressibility. Soft soil is found in the Indrapura-Kisaran Toll Road Construction Project at STA 112+550 and has a geometry that requires a high embankment, necessitating soil reinforcement to address the issue. In this study, the Geosynthetic Encased Stone Columns (GESC) method was used with variations in geosynthetic tensile strength of 150 kN/m, 200 kN/m, 300 kN/m, and 400 kN/m. The analysis process conducted in this study involves analyzing the bearing capacity and settlement conditions without and with reinforcement using analytical and numerical methods. Generally, the magnitude of bearing capacity and reduction in settlement due to reinforcement with geosynthetic-encased stone columns is influenced by the tensile strength of the geosynthetic, spacing, and installation pattern. After reinforcement, the soil-bearing capacity increased by 75 to 84%. In addition, due to the GESC reinforcement, there was a reduction in settlement of up to 86% using the analytical method and 61.8% using the numerical method. There was an increase in the stability of the embankment, where before reinforcement the stability was 1,453, and after reinforcement, it became 1,596 to 1,828.
Studi Daya Dukung dan Distribusi Beban Fondasi Tiang Bor Terhadap Static Loading Test Yang Terinstrumentasi Julita Hayati; Muhammad Faisal Nugraha; Syahidus Syuhada
Teras Jurnal : Jurnal Teknik Sipil Vol. 15 No. 2 (2025): Teras Jurnal (September)
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v15i2.1255

Abstract

Abstrak   Dalam merancang sebuah fondasi diperlukan pengujian lapangan untuk mengevaluasi kemampuan dan kinerja struktur serta memverifikasi kemampuan fondasi yang terpasang dalam menaham beban yang telah direncanakan. Uji pembebanan yang terinstrumentasi dapat dilakukan untuk mengetahui daya dukung fondasi dan secara spesifik mencatat perilaku beban-deformasi yang diterima tiang selama uji pembebanan. Oleh karena itu peneliti bermaksud menganalisis daya dukung aksial dan distribusi beban pada fondasi bored pile terhadap hasil static loading test terinstrumentasi vibrating wire strain gauge dan tell-tale ekstensometer. Penelitian ini menggunakan persamaan empiris  dan program geoteknik dalam mengestimasi. Hasil analisis menunjukkan bahwa daya dukung aksial static loading test lebih besar dibandingkan dengan daya dukung teoritisnya sehingga menunjukkan fondasi mampu menahan beban yang direncanakan. Distribusi beban hasil instrumentasi menunjukkan >90% beban telah terdistribusi pada selimut tiang sehingga perlu dilakukan pemendekan tiang.   Kata kunci: daya dukung aksial, distribusi beban, Static Loading Test, Tell-Tale Eksensometer, VWSG     Abstract   In designing a foundation, field testing is necessary to evaluate the capacity and performance of the pile and verify the installed foundation's ability to resist the structure load. Instrumented loading tests can be conducted to determine the load-bearing capacity of the foundation and the load-deformation behavior experienced by the piles during the loading test. Therefore, the researchers analyze the axial load-bearing capacity and load distribution on the bored pile foundation based on the results of the static loading test using an instrumented VWSG and Tell-Tale Extensometer. This research uses empirical equations and geotechnical programs. The analysis results show that the axial bearing capacity from the static loading test is greater than its theoretical bearing capacity, indicating that the foundation can withstand the structural load. The load distribution from the instrumentation results shows that >90% of the load has been distributed to the skin friction pile, so pile shortening is necessary.   Keywords: axial bearing capacity, load distribution, Static Loading Test, Tell-Tale Eksensometer, VWSG
Co-Authors Ahmad Auliadi Yufrizal Ayu Sinta Aprilia Celvin Shahroni Fauzi Buldan Yaumun Julita Hayati Muhammad Faisal Nugraha Puspa Ningrum Rahmat Kurniawan Try Lestari Sihotang