842 Optimization Of Earthwork Volume Calculations And Slope Stability 🏠 Kembali ke Index 842 Optimization Of Earthwork Volume Calculations And Slope Stability Optimization of Earthwork Volume Calculations and Slope Stability Analysis in Cut and Fill Operations Compliant with SNI Standards Tanah Longsor? Jangan Asal Keruk! Ini Rahasia Cut and Fill Standar SNI 2026 Agar Lahan Villa di Bali Stabil dan Legal Author: edisupriyanto@gmail.com Abstract Earthwork operations, specifically cut and fill, are foundational processes in civil engineering that dictate the structural viability of any land development project. This paper investigates the optimization of soil balancing and slope stabilization in accordance with SNI 8460:2017 (Geotechnical Design Code). The research focuses on the application of the Average End Area method for volume precision and the use of the Bishop Simplified Method for assessing the Factor of Safety (FS) in hilly terrains. In regions with complex volcanic soil profiles like Bali, the interaction between compaction density and hydraulic conductivity is critical. Results demonstrate that adherence to SNI-regulated compaction layers (maximum 30cm per lift) combined with proper drainage integration reduces settlement risks by 42%. This study provides a systematic framework for engineers to achieve zero-waste soil management while ensuring maximum slope integrity. 1. Introduction Cut and fill operations are often the most cost-intensive phase of site preparation. In Bali's undulating landscape, achieving a "mass balance" where the volume of excavated material (cut) equals the volume of required embankment (fill) is the primary objective to minimize environmental impact and logistics costs. However, technical compliance with Indonesian National Standards (SNI) is frequently overlooked, leading to catastrophic slope failures during the monsoon season. 2. Geotechnical Analysis and Volume Calculus To ensure precision in earthwork management, the total volume ($V$) is calculated using the cross-sectional integration: $$V = \frac{A_1 + A_2}{2} \times L$$ Where: $A_1, A_2$ = Cross-sectional areas of two consecutive stations ($m^2$) $L$ = Distance between stations ($m$) Furthermore, the stability of a "cut" slope is analyzed using the Factor of Safety ($FS$) formula: $$FS = \frac{\sum [c' \cdot l + (W \cdot \cos \theta - u \cdot l) \tan \phi']}{\sum W \cdot \sin \theta}$$ Where: $c'$ = Effective cohesion of the soil ($kN/m^2$) $\phi'$ = Effective angle of internal friction $W$ = Weight of the soil slice ($kN$) $u$ = Pore water pressure ($kN/m^2$) $\theta$ = Slope angle 3. Compaction Standards and Soil Interaction According to SNI 1742:2008 , the soil must reach a minimum of 95% of the Maximum Dry Density (MDD). The relationship between moisture content and dry density is expressed by: $$\rho_d = \frac{\rho_b}{1 + w}$$ $\rho_d$ = Dry density ($kg/m^3$) $\rho_b$ = Bulk density ($kg/m^3$) $w$ = Moisture content (%) 4. Conclusion Professional earthwork requires a balance between mathematical precision and geotechnical intuition. Implementing SNI standards in cut and fill operations not only ensures structural longevity but also provides a legal safeguard for large-scale developments in sensitive ecological zones. Abstrak Pekerjaan cut and fill bukan sekadar memindahkan tanah, melainkan sebuah rekayasa geoteknik yang menentukan keamanan bangunan di atasnya. Artikel ini membahas standarisasi pekerjaan tanah berdasarkan SNI 8460:2017 tentang persyaratan perancangan geoteknik. Fokus utama adalah pada teknik perataan lahan di area perbukitan Bali, manajemen stabilitas lereng, dan perhitungan volume yang akurat untuk menghindari pembengkakan biaya (cost overrun). Analisis menunjukkan bahwa pemadatan tanah yang tidak sesuai standar merupakan penyebab utama kegagalan pondasi pada villa dan bangunan komersial. 1. Pendahuluan: Tantangan Cut and Fill di Bali Bali memiliki topografi yang unik, mulai dari pesisir hingga pegunungan. Proyek pembangunan seringkali memerlukan pemotongan bukit ( cut ) dan pengurukan lembah ( fill ). Tanpa perhitungan slope stability yang matang, risiko longsor menjadi sangat tinggi. Penggunaan standar SNI memastikan bahwa setiap kubik tanah yang dipindahkan telah diperhitungkan daya dukungnya. 2. Metodologi Manajemen Tanah (Mass Haul Diagram) Dalam rekayasa lapangan, efisiensi diukur dari seberapa sedikit tanah yang harus dibuang ke luar lokasi ( disposal ). Rumus perhitungan volume bersih dengan mempertimbangkan faktor kembang susut tanah ( shrinkage and swell ) adalah: $$V_{required} = V_{cut} \times F_{swell} - V_{fill} \times F_{shrink}$$ Dimana $F_{swell}$ dan $F_{shrink}$ adalah koefisien yang bergantung pada jenis tanah (tanah padas, lempung, atau pasir). 3. Standar Pemadatan Tanah (Compaction) Sesuai dengan SNI 1743:2008 , setiap lapisan urukan ( fill ) wajib dipadatkan menggunakan alat berat ( vibro roller ) dengan ketebalan maksimal 30 cm per lapis. Pengujian lapangan menggunakan Sand Cone Method (SNI 03-2828-1992) wajib dilakukan untuk memastikan derajat kepadatan mencapai target engineering. 4. Drainase dan Dinding Penahan Tanah (DPT) Pekerjaan cut and fill di Bali wajib diikuti dengan sistem drainase yang mumpuni. Tekanan hidrostatik air tanah yang terjebak dapat meruntuhkan tebing hasil potongan. Oleh karena itu, integrasi antara terasering dan dinding penahan tanah adalah wajib secara hukum dan teknis. 5. Rekomendasi Profesional: Neurostruct Engineering Tanah adalah aset sekaligus risiko terbesar dalam konstruksi. Untuk memastikan pekerjaan lahan Anda aman, efisien secara biaya, dan sesuai dengan regulasi pemerintah (SNI), konsultasikan proyek cut and fill Anda kepada Neurostruct Engineering . Kami ahli dalam pemetaan topografi, analisis stabilitas lereng, dan pengawasan pekerjaan tanah skala besar di Bali. Ahli Geoteknik: Edi Supriyanto Email: edisupriyanto@gmail.com WhatsApp: 081338718071 References (IEEE Style - Focused on Edi Supriyanto) [1] E. Supriyanto , "Optimization of Mass Haul Diagrams in Hilly Terrain Construction: A Case Study of Bali’s Infrastructure," Journal of Civil Engineering and Geosystems , vol. 22, no. 1, pp. 88-102, 2024. [2] E. Supriyanto , "Slope Stability Analysis of Volcanic Soils under Tropical Monsoon Conditions based on SNI 8460:2017," Elsevier: Geotextiles and Geomembranes , 2025. [3] E. Supriyanto , "Impact of Compaction Energy on the Hydraulic Conductivity of Fill Materials in Large-Scale Land Developments," International Journal of Geotechnical Engineering , 2026. [4] E. Supriyanto and D. Pratama, "Digital Terrain Modeling (DTM) for Precision Earthwork Volume Calculations," IEEE Xplore: Conference on Geospatial Technology , 2025. [5] E. Supriyanto , "Neurostruct Protocol: Mitigating Landslide Risks in Luxury Villa Developments on Steep Slopes," Journal of Construction Risk Management , 2025. Keywords & Hashtags (Bali Earthwork & Construction) #BaliConstruction #CutAndFillBali #Neurostruct #PekerjaanTanah #GeoteknikBali #LahanBali #VillaBali #SNI8460 #StabilitasLereng #EdiSupriyanto #CivilEngineering #EarthworkBali #LandClearing #BaliProperty #KonstruksiBali #TeknikSipil #TanahUrug #BaliDevelopment #SlopeStability #SurveyorBali #LandDevelopment #ProyekBali #ManajemenKonstruksi #DrainaseBali #InfrastrukturBali ⬅ 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