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Analisis Stabilitas Galian Dalam dengan Soldier Pile pada Perencanaan New Pendopo Tonny Soewandito Politeknik Negeri Bandung Irbadhsyah, Moh. Zidane Ardian; Faizah, Salma Noor; Somantri, Andri Krisnandi; Muchtar; Kasyanto, Heri; Febriansya, Aditia
Prosiding Industrial Research Workshop and National Seminar Vol. 16 No. 1 (2025): Vol. 16 No. 1 (2025): Prosiding 16th Industrial Research Workshop and National
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/irwns.v16i1.6696

Abstract

Pekerjaan galian pada proyek pembangunan semi-basement Gedung New Pendopo Tonny Soewandito Politeknik Negeri Bandung memerlukan analisis terhadap kestabilan dan efektivitas sistem penahan tanah untuk menjamin keamanan konstruksi. Studi ini menganalisis penggunaan soldier pile sebagai dinding penahan tanah (DPT), yang dipilih berdasarkan hasil matriks pemilihan dinding penahan. Analisis dilakukan secara numerik menggunakan perangkat lunak PLAXIS 2D dengan mempertimbangkan kondisi tanah setempat, beban lateral aktif, tekanan air tanah, serta pengaruh gempa dengan pendekatan pseudo-statik (Kh = 0,29g; Kv = 0,059g). Hasil analisis menunjukkan bahwa pemasangan soldier pile dengan panjang 6 meter dan jarak antar tiang 0,4 meter mampu meningkatkan nilai faktor keamanan (SF) dari 1,03 menjadi 1,2 pada kondisi gempa, dan dari 1,30 menjadi 1,8 pada kondisi tanpa gempa. Selain itu, hasil deformasi menunjukkan bahwa bidang gelincir kritis berhasil ditahan oleh kedalaman tiang yang telah melewati zona kegagalan. Evaluasi defleksi lateral menunjukkan nilai maksimum sebesar 0,0084 cm, masih berada di bawah batas toleransi sebesar 0,5% dari kedalaman galian sesuai SNI 8460:2017. Dengan demikian, penerapan soldier pile terbukti efektif dalam meningkatkan kestabilan galian dan memenuhi kriteria batas layanan. Temuan ini dapat menjadi acuan dalam penentuan metode penahan tanah serupa untuk proyek infrastruktur dengan kondisi geoteknik yang sebanding.
ANALISIS BIAYA MATERIAL PEKERJAAN DINDING MENGGUNAKAN BETON PRECAST DAN BATA RINGAN PADA PROYEK GEDUNG PT. MATTEL INDONESIA CIKARANG BEKASI Raafidiani, Reni; Garata, Garwin; Febriansya, Aditia
Jurnal TEDC Vol 18 No 2 (2024): JURNAL TEDC
Publisher : UPPM Politeknik TEDC Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70428/tedc.v18i2.843

Abstract

PT. Mattel Indonesia in Cikarang Bekasi during structural work so the contractor must determine the strategy that must be used to speed up the completion of the project. Replacing the materials used in wall work is one alternative that can be done by the contractor. Where the yield value is there are two material choices, namely precast concrete with a yield of 246,131.11 m2 and a lightweight brick yield of 232,101.6 m2. Thechoice of the two materials is determined by considering a study of the material costs required to install each material. The analysis carried out begins by studying the literature on the management of each material and knowing the conditions in the field. The design budget (RAB) required for precast concrete walls and lightweight brick walls is comparable. The duration required for the work of making precast concrete walls and lightweight brick walls is comparable. In terms of material cost comparison, precast concrete walls have the most effective SOP to apply in this project. Of all the variables compared, the material that is suitable to replace wall material in this project is precast concrete walls.
PEMANFAATAN LIMBAH GROUND GRANULATED BLAST FURNACE SLAG (GGBFS) DAN FLY ASH SEBAGAI PENGGANTI SEBAGIAN SEMEN PADA KUAT TEKAN BETON Raafidiani, Reni; Putri, Asti Aprillia Rekta; Febriansya, Aditia
Jurnal TEDC Vol 19 No 1 (2025): JURNAL TEDC
Publisher : UPPM Politeknik TEDC Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70428/tedc.v19i1.1214

Abstract

Ground Granulated Blast Furnace Slag (GGBFS) and Fly Ash are two industrial by-products with great potential as partial cement substitutes in concrete mixtures. GGBFS is a by-product of the iron smelting process in the steel industry. Once cooled and ground into a fine powder, it exhibits pozzolanic and cementitious properties. Meanwhile, Fly Ash, the residual ash from coal combustion in power plants, also possesses pozzolanic characteristics. The use of GGBFS and Fly Ash not only reduces the reliance on Portland cement but also provides various technical benefits, such as improving the durability of concrete, reducing heat of hydration, and enhancing long-term strength. Additionally, utilizing these materials aligns with the principles of sustainable development by reducing industrial waste and lowering carbon emissions. This study employs Ground Granulated Blast Furnace Slag (GGBFS) and Fly Ash as partial substitutes for cement in the production of geopolymer concrete. The proportion of GGBFS used is 50% of the total cement weight, while Fly Ash is applied in proportions of 5%, 10%, and 15% of the total cement weight. The concrete was designed with a target compressive strength of 26 MPa. Tests were conducted on 24 cylindrical concrete samples measuring 15 x 30 cm. The results revealed that the average compressive strength of concrete at 28 days was 34.15 MPa for normal concrete. For mixtures with a PCC:GGBFS:Fly Ash ratio of 45:50:5, the average compressive strength was 23.46 MPa; for a 40:50:10 ratio, the average strength was 18.48 MPa; and for a 35:50:15 ratio, the average strength was 19.54 MPa. Based on the analysis, the mix with 50% GGBFS and 5% Fly Ash was determined to be the optimal combination, as it achieved the highest compressive strength among all variations, at 23.46 MPa. This demonstrates that this combination can be utilized as a partial cement replacement for concrete production, considering specific requirements and its potential applications.