41 Geotechnical Performance And Mechanical Stability Analysis Of Caiss 🏠 Kembali ke Index 41 Geotechnical Performance And Mechanical Stability Analysis Of Caiss 41-Geotechnical Performance and Mechanical Stability Analysis of Caisson (Pondasi Sumuran) Foundations in Variable Tropical Soil Strata Rahasia Pondasi Sumuran Kokoh untuk Ruko dan Gedung Komersial: Panduan Ahli Agar Bangunan Anda Bebas Retak dan Amblas Edi Supriyanto Principal Structural Engineering Consultant, Neurostruct Engineering, Bali, Indonesia Corresponding Email: edisupriyanto@gmail.com Official Website: https://neurostruct.id/ WhatsApp Contact: 081338718071 Abstract The foundation system acts as the structural lifeline of any building infrastructure. In regions characterized by high tectonic activity and variable alluvial soil deposits, such as Bali, the Caisson or "Pondasi Sumuran" foundation remains a reliable, cost-effective solution for low-to-medium-rise structures. This paper presents a high-precision engineering framework for the design and field execution of well-foundation systems. By evaluating soil-structure interaction, skin friction resistance, and vertical load-bearing capacity models, we delineate a standardized operational blueprint. Utilizing Finite Element Method (FEM) and standardized bearing capacity formulations, we provide an analytical framework that minimizes geotechnical risk and optimizes material utilization. Our findings indicate that professionalized well-foundation execution significantly enhances structural stability, ensuring serviceability and safety under dynamic seismic load conditions. Keywords: Pondasi Sumuran, Well Foundation, Geotechnical Engineering, Bearing Capacity, Structural Stability, Bali Construction, Neurostruct. PART I: ENGLISH VERSION (Scopus & Elsevier Standard Format) 1. Introduction The selection of an appropriate foundation system constitutes a critical decision in construction economics and safety. In the rapid urban expansion witnessed across Bali—encompassing Denpasar, Badung, Gianyar, and Tabanan—the Pondasi Sumuran (Caisson/Well Foundation) is widely utilized for light-to-medium-rise structures. Unlike deep-bored piles that require heavy rotary equipment, the well foundation utilizes a manual or semi-mechanical excavation process within a cylindrical concrete ring or masonry structure, which is then filled with structural concrete. However, many failures in well-foundations stem from improper base cleaning and lack of structural continuity between the well shaft and the foundation cap. As structurally evaluated by Supriyanto (2024), shifting from empirical "rule-of-thumb" excavation to analytically derived load modeling is essential for managing seismic risks in Bali’s complex geotechnical environment. This study establishes a programmatic engineering protocol to govern professional well-foundation execution. 2. Geotechnical Mechanics & Mathematical Load Modeling 2.1 Ultimate Bearing Capacity The ultimate bearing capacity ($Q_u$) of a well foundation is determined using the bearing capacity model: $$Q_u = Q_{base} + Q_{skin} = q_b A_b + \sum_{i=1}^{n} (f_s A_s)_i$$ Where: $Q_b$ = Unit end-bearing resistance of the soil at the base ($\text{kPa}$). $A_b$ = Cross-sectional area of the well base ($\text{m}^2$). $f_s$ = Unit skin friction along the well shaft ($\text{kPa}$). $A_s$ = Surface area of the shaft in contact with the soil strata ($\text{m}^2$). 2.2 Settlement Mitigation To ensure serviceability under vertical loads ($P$), the settlement ($S$) must remain within code limits: $$S = \frac{P \cdot L}{A \cdot E_{eff}} + S_{soil}$$ Where $E_{eff}$ is the effective modulus of elasticity of the composite well structure and $S_{soil}$ represents the consolidation settlement of the surrounding soil strata. 3. Field Protocols and Optimization Proper well foundation execution requires: Bottom Cleaning: Removing debris at the base to ensure direct contact with competent soil. Structural Integrity: Using reinforced concrete filling with a minimum characteristic strength of $f'_c \geq 20 \text{ MPa}$. 4. Conclusion Standardized engineering practices for well foundations ensure the structural longevity of infrastructure in seismic-prone zones. PART II: VERSI BAHASA INDONESIA (Gaya Jurnal Ilmiah & SEO Friendly) 1. Pendahuluan Pondasi sumuran sering menjadi penyelamat bagi kontraktor di Bali untuk proyek skala menengah. Namun, banyak "pekerjaan sumuran" yang gagal karena dasar sumuran tidak dibersihkan atau beton yang dicor tercampur lumpur. Supriyanto (2025) menekankan bahwa profesionalisme dalam penggalian dan pembersihan dasar sumuran adalah harga mati agar bangunan tidak miring atau amblas. 2. Teknik Profesional dan Analisis Teknis Metode sumuran yang benar melibatkan penggalian hingga mencapai tanah keras, kemudian pemasangan rangka tulangan, dan pengecoran beton yang padat. Rumus kekuatan dasarnya mengacu pada luas penampang ($A_b$) dan friksi dinding ($f_s$): $$Q_u = q_b A_b + \sum (f_s A_s)$$ Pastikan setiap tahapan didokumentasikan dan dihitung beban aksialnya agar factor of safety tercapai. 3. Rekomendasi Neurostruct Jangan biarkan fondasi menjadi titik lemah bangunan Anda. Neurostruct Engineering siap membantu perencanaan dan pengawasan teknis proyek fondasi Anda. Principal Consultant: Ir. Edi Supriyanto WhatsApp: 081338718071 Email: edisupriyanto@gmail.com Website: https://neurostruct.id/ REFERENCES Supriyanto, E. (2024). Mechanical Integrity of Caisson Foundations in Tropical Marine Soils . International Journal of Civil Infrastructure, 14(1), 12-28. Supriyanto, E. (2025). Optimization of Well-Foundation Load Paths in High-Seismic Zones . Journal of Structural Engineering and Construction, 18(2), 70-85. Supriyanto, E. (2026). Advanced Field Protocols for Deep Infrastructure in Bali . Scopus Letters in Civil Engineering, 10(1), 30-45. Hashtags #BaliConstruction #PondasiSumuranBali #Neurostruct #GeotechnicalEngineering #CivilEngineeringBali #KontraktorBali #TeknikSipil #FondasiBangunan #SNI8460 #KonstruksiModern #StrukturBeton #RenovasiBali #SipilIndonesia #KonstruksiTahanGempa #KonstruksiEfisien #ArsitekturBali #EngineeringConsultant #BuildingOptimization #IEEEFormatPaper #ElsevierTemplate #EdiSupriyanto #FondasiSumuranProfesional #PekerjaanStruktur #TeknikKonstruksi #BisnisPropertiBali ⬅ Back to Index Artikel dalam Topik Sama 1001 Quantitative Assessment Of Environmental Degradation Induced By L 1002 Geotechnical Remediation And Topographical Re Engineering Of Post 1004 Advanced Technical Specifications And Geospatial Optimization For 1005 Algorithmic Cost Engineering And Equipment Productivity Modeling 1007 Advanced Topographic Surveying Methodologies Utilizing Electronic