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All Journal REKAYASA AGREGAT Prosiding SNITP (Seminar Nasional Inovasi Teknologi Penerbangan) EPI International Journal of Engineering International Journal of Engineering, Science and Information Technology Extrapolasi AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Jurnal Talenta Sipil International Journal Science and Technology (IJST) JITSi : Jurnal Ilmiah Teknik Sipil Journal Serambi Engineering (JSE) Jurnal Teknik Sipil Journal of Engineering and Technological Sciences Advance Sustainable Science, Engineering and Technology (ASSET) Jurnal Abdi Karya Sipil Proceeding of The International Conferences on Engineering Sciences
Karina Meilawati Eka Putri
Universitas Pembangunan Nasional Veteran Jawa Timur
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Numerical Analysis of Road Embankment Stability and Settlement Using Variations of Bamboo Chips and Fly Ash Mixtures Vio Aditya Pratama Wijaya; Dian Purnamawati Solin; Karina Meilawati Eka Putri
AJARCDE (Asian Journal of Applied Research for Community Development and Empowerment) Vol. 10 No. 2 (2026)
Publisher : Asia Pacific Network for Sustainable Agriculture, Food and Energy (SAFE-Network)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29165/ajarcde.v10i2.1052

Abstract

Soft soil is one of the major challenges in road embankment construction due to its low bearing capacity, low shear strength, and high compressibility, which may lead to excessive settlement and slope instability. Therefore, an effective ground improvement method is required to enhance the mechanical performance of the subgrade soil. This study aims to analyze the stability and deformation behavior of road embankments constructed on soft soil stabilized with Fly Ash and reinforced with Bamboo Chips. The analysis was carried out using the Finite Element Method (FEM) based on the Mohr–Coulomb constitutive model. The numerical modeling compared untreated soil conditions with stabilized soil conditions using various percentages of Fly Ash and the addition of Bamboo Chips. Soil parameters were obtained from laboratory testing and incorporated into the numerical model. The analysis stages included embankment geometry modeling, load application, consolidation analysis, and safety factor analysis using the phi/c reduction method. The results indicate that the addition of Fly Ash and Bamboo Chips increased the embankment safety factor and reduced settlement compared to untreated soil conditions. Therefore, the combination of chemical stabilization using Fly Ash and reinforcement with Bamboo Chips has the potential to become an effective and sustainable alternative for soft soil improvement in road embankment construction in Indonesia. Contribution to Sustainable Development Goals (SDGs):SDG 9   : Industry, Innovation and InfrastructureSDG 11 : Sustainable Cities and CommunitiesSDG 12 : Responsible Consumption and ProductionSDG 13 : Climate ActionSDG 15 : Life on Land
Implementasi Drainase Berkelanjutan dan Infrastruktur Hijau sebagai Solusi Adaptasi Iklim: Mitigasi Banjir dan Konservasi Air Tanah di Desa Kedamean Karina Meilawati Eka Putri; Dian Purnamawati Solin; Griselda Junianda Velantika
Jurnal Abdi Karya Sipil Vol. 2 No. 1 (2026): April 2026
Publisher : Program Studi Teknik Sipil, Fakultas Teknik dan Sains, Universitas Pembangunan Nasional "Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jaksi.v2i1.16

Abstract

Permasalahan banjir di wilayah pedesaan yang mulai terurbanisasi, seperti Desa Kedamean di Kabupaten Gresik, memerlukan solusi yang tidak hanya teknis tetapi juga berbasis partisipasi masyarakat. Sistem drainase konvensional yang hanya berfokus pada pengaliran air terbukti kurang efektif dan cenderung memicu kekeringan di musim kemarau karena berkurangnya infiltrasi. Kegiatan pengabdian masyarakat ini bertujuan mengimplementasikan strategi adaptasi iklim melalui penerapan drainase berkelanjutan dan infrastruktur hijau. Metode yang digunakan adalah sosialisasi interaktif dan demonstrasi teknis menggunakan alat peraga (mock-up) konstruksi Lubang Resapan Biopori (LRB) serta sumur resapan. Hasil kegiatan menunjukkan transformasi paradigma yang signifikan pada kader PKK mengenai pengelolaan air hujan. Peserta berhasil mengidentifikasi korelasi antara peningkatan infiltrasi dengan stabilitas ketersediaan air tanah untuk mitigasi kekeringan. Penggunaan media peraga terbukti efektif meningkatkan diseminasi teknologi tepat guna bagi masyarakat awam. Oleh karena itu, dapat disimpulkan bahwa integrasi infrastruktur hijau berbasis komunitas merupakan instrumen krusial dalam menciptakan resiliensi pemukiman terhadap bencana hidrometeorologi.
Optimasi Kedalaman Tiang Bor untuk Memenuhi Kinerja Daya Dukung dan Deformasi pada Kondisi Ketidaksempurnaan Lubang Pengeboran Alivia Wulan Yufika; Dian Purnamawati Solin; Karina Meilawati Eka Putri
Rekayasa Vol 19, No 1: January - April 2026
Publisher : Universitas Trunodjoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v19i1.34223

Abstract

Penelitian ini bertujuan untuk menganalisis kinerja fondasi tiang bor pada kondisi ketidaksempurnaan lubang pengeboran yang menyebabkan pengurangan kedalaman tiang dari 38 m menjadi 30 m. Penelitian ini dilakukan untuk memberikan evaluasi antara kapasitas aksial, kapasitas lateral, serta deformasi fondasi pada kondisi ketidaksempurnaan lubang pengeboran, sekaligus merekomendasikan langkah optimasi yang sesuai dengan kondisi lapangan. Analisis dilakukan terhadap kapasitas daya dukung aksial menggunakan metode Reese and Wright (1977), kapasitas daya dukung lateral menggunakan metode Broms (1964), serta deformasi berupa penurunan aksial dan defleksi lateral menggunakan pendekatan numerik berbasis kurva t–z dan p–y. Hasil analisis menunjukkan bahwa kapasitas daya dukung aksial menurun dari 1287,629 ton menjadi 1006,807 ton atau sebesar 21,81% akibat berkurangnya kontribusi tahanan selimut. Pada analisis lateral, diperoleh kapasitas ultimit sebesar 150,28 kN dengan metode analitis dan 161,4 kN dengan pendekatan numerik, yang menunjukkan bahwa pendekatan numerik memberikan hasil yang lebih rinci. Dari sisi deformasi, penurunan aksial meningkat dari 8 mm menjadi 14 mm, sedangkan defleksi lateral meningkat dari 56 mm menjadi 65 mm. Hasil tersebut menunjukkan bahwa ketidaksempurnaan lubang pengeboran berpengaruh signifikan terhadap penurunan kapasitas dan peningkatan deformasi fondasi. Oleh karena itu, diperlukan upaya optimasi berupa penambahan kedalaman tiang serta penggunaan casing permanen hingga ujung fondasi untuk memastikan kinerja fondasi tetap memenuhi persyaratan teknis.
Numerical Analysis of the Influence of Bamboo Chips Variations on Road Embankment Stability and Settlement Arasi Arahman; Dian Purnamawati Solin; Karina Meilawati Eka Putri
EPI International Journal of Engineering Vol 8 No 2 (2025): Volume 8 Number 2, August 2025
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Soft soil is characterized by low bearing capacity, high compressibility, and substantial settlement, thereby frequently causing complications in road embankment construction. One viable method for soil improvement is stabilization utilizing eco-friendly materials, such as bamboo chips. However, research concerning the effects of varying bamboo chip mixtures on the stability and settlement of embankments constructed on soft soil remains limited. This study aims to analyze the impact of bamboo chip mixture variations on consolidation characteristics, embankment stability, and soft soil settlement, utilizing the finite element method via PLAXIS 2D software. The investigation was conducted through one-dimensional consolidation testing (oedometer tests) on native soil and bamboo chip mixture variations of 25%, 30%, and 35%. The experimental results served as input parameters for the PLAXIS 2D numerical modeling to evaluate the safety factor and embankment settlement. The findings indicate that the incorporation of bamboo chips effectively enhances embankment stability and mitigates soil settlement compared to untreated soil conditions. The TA + BC (Native Soil + Bamboo Chips) 30% variation yielded the most optimal outcomes, exhibiting the lowest compression index and consolidation settlement, alongside a higher safety factor relative to the other variations. Overall, bamboo chips demonstrate significant potential as an economical and environmentally sustainable alternative stabilization material for road embankment construction over soft soils.
OPTIMASI SIFAT MEKANIS TANAH LUNAK DENGAN PENAMBAHAN BAMBOO CHIPS DAN FLY ASH Karina Jelita Putri; Dian Purnamawati Solin; Karina Meilawati Eka Putri
JITSi : Jurnal Ilmiah Teknik Sipil Vol. 6 No. 2 (2026): Juni 2026
Publisher : Universitas Perjuangan Tasikmalaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36423/jitsi.v6i2.2784

Abstract

Abstract— Soft soil, which is extensively distributed along the coastal regions of Indonesia, poses a significant geotechnical challenge to infrastructure development due to its characteristically low shear strength and high settlement potential. Consequently, ground improvement measures are imperative to ensure the stability and safety of structures constructed upon such deposits. Several studies have investigated the utilization of environmentally sustainable materials as alternatives for soft soil stabilization, including the incorporation of fly ash a pozzolanic industrial by-product that enhances interparticle bonding through cementitious reactions and bamboo fibre as a discrete mechanical reinforcement element proven to improve compressive strength and bearing capacity. Premised upon these findings, the present study combines both materials in the form of bamboo chips and fly ash to exploit the synergistic interaction between physical reinforcement and chemical stabilization mechanisms. This study aims to analyze the effect of bamboo chips and fly ash addition on the mechanical properties of soft soil and to determine the optimum mixture composition. Laboratory experiments were conducted comprising compaction (Proctor), Unconfined Compressive Strength (UCS), and California Bearing Ratio (CBR) tests, with bamboo chips variations of 25%, 30%, and 35% and a constant fly ash content of 15%. The results demonstrate that the most effective variation was achieved at 25% bamboo chips and 15% fly ash, yielding an undrained cohesion (Cu) of 200.345 kN/m² and a CBR value of 14.67% at 65 blows, which produced the most substantial improvement in both strength and bearing capacity of the soft soil relative to all other investigated variations. Keywords — Soft soil, Soil stabilization, Bamboo chips, Fly ash Abstrak— Tanah lunak yang tersebar luas di wilayah pesisir Indonesia menjadi tantangan serius dalam pembangunan infrastruktur akibat kuat geser yang rendah dan potensi penurunan yang tinggi. Oleh karena itu, diperlukan upaya perbaikan tanah agar struktur yang dibangun di atasnya dapat berdiri dengan aman dan stabil. Beberapa penelitian mengkaji penggunaan material ramah lingkungan sebagai alternatif stabilisasi tanah lunak, di antaranya penambahan fly ash yang bersifat pozzolan untuk meningkatkan ikatan antar partikel tanah, serta serat bambu sebagai elemen perkuatan mekanis yang terbukti meningkatkan kuat tekan dan daya dukung tanah. Berdasarkan hal tersebut, penelitian ini mengkombinasikan keduanya dalam bentuk bamboo chips dan fly ash untuk memanfaatkan efek sinergis antara perkuatan fisik dan stabilisasi kimia. Penelitian ini bertujuan untuk menganalisis pengaruh penambahan bamboo chips dan fly ash terhadap sifat mekanis tanah lunak serta menentukan kadar campuran optimumnya. Pengujian dilakukan melalui serangkaian uji laboratorium meliputi pemadatan (Proctor), UCS, dan CBR dengan variasi bamboo chips sebesar 25%, 30%, dan 35% serta fly ash sebesar 15%. Hasil penelitian menunjukkan bahwa variasi paling efektif pada penambahan bamboo chips 25% dan fly ash 15%, dengan nilai Cu sebesar 200,345 kN/m2 dan nilai CBR sebesar 14,67% pada 65 tumbukan, yang memberikan peningkatan kekuatan dan daya dukung tanah lunak dibandingkan variasi lainnya. Kata kunci — Tanah lunak, Stabilisasi tanah, Bamboo chips, Fly ash
The Effect of Building Irregularities on the Structural Performance of Air Traffic Control Towers in High Seismic Zones Ika Salsabila Nurahida; Karina Meilawati Eka Putri; Kemal Aziz
Proceeding of the International Conferences on Engineering Sciences Vol. 3 No. 1 (2026): January : Proceeding of the International Conferences on Engineering Sciences
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/iconfes.v3i1.189

Abstract

This study examines the seismic performance of slender Air Traffic Control (ATC) towers in high‑hazard regions (PGA > 0.4g), where vertical taper, torsional eccentricity, and top‑heavy cab mass can significantly increase drift, base shear, and collapse risk relative to conventional buildings. Existing studies often rely on linear procedures and outdated provisions, leading to underestimation of nonlinear behaviour and limited guidance for ATC towers designed to SNI 1726:2019. The research aims to quantify these irregularity effects and formulate design recommendations that satisfy Immediate Occupancy, Life Safety, and Collapse Prevention performance targets. The methodology couples response spectrum analysis, using a site‑specific Padang spectrum consistent with SNI 1726:2019 and ASCE 7‑16, with nonlinear pushover analysis interpreted through FEMA/ATC performance‑based criteria. A parametric study is performed on three cab configurations small, medium, and large modelled as 5%, 15%, and 25% mass ratios at the tower head, while keeping a 10 m × 10 m hybrid core–frame shaft constant. Results indicate that larger cab mass produces systematic but moderate increases in global displacement, story drift, and base shear, while plastic hinges localize primarily in the upper stories and cab‑support region, yielding performance levels from Immediate Occupancy to Collapse Prevention. Overall, the tower meets code drift limits and acceptable performance if local strengthening is provided around the shaft–cab interface, offering a calibrated reference for top‑heavy ATC tower design in Indonesian high‑seismic settings and identifying priorities for future time‑history and soil–structure interaction studies.
Evaluasi Stabilitas Lereng JLS Lot 3 Pantai Serang–Sumbersih Menggunakan Software Berbasis Limit Equilibrium Method Elang Wijaya Kusuma; Rani Ardiansyah Ardjito; Karina Meilawati Eka Putri
EXTRAPOLASI Vol. 23 No. 01 (2026)
Publisher : Universitas 17 Agustus 1945 Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Pembangunan infrastruktur jalan pada topografi ekstrem dengan kontur perbukitan terjal sering kali mengubah keseimbangan tegangan tanah yang berpotensi memicu ketidakstabilan. Untuk memitigasi risiko tersebut, evaluasi stabilitas lereng diperlukan guna memastikan keamanan infrastruktur jalan. Penelitian ini bertujuan untuk mengevaluasi stabilitas lereng pada proyek Jalur Lintas Selatan. Metode penelitian menerapkan analisis kuantitatif berbasis komputasi menggunakan Metode Kesetimbangan Batas. Instrumen analisis meliputi simulasi dengan metode Morgenstern Price, Bishop, Ordinary, dan Janbu yang memproses data sekunder berupa parameter sifat fisik tanah dan geometri lereng. Hasil penelitian menunjukkan bahwa seluruh metode analisis menghasilkan nilai Faktor Keamanan yang secara konsisten melampaui batas kritis 1,5 sesuai persyaratan standar SNI 8460:2017. Nilai Faktor Keamanan tertinggi sebesar 1,748 diperoleh melalui metode Bishop, sedangkan nilai terendah sebesar 1,648 dihasilkan oleh metode Janbu. Variasi nilai ini diakibatkan oleh perbedaan asumsi gaya antar irisan pada setiap metode, namun konsistensi angka di atas ambang batas mengindikasikan reliabilitas model yang tinggi. Disimpulkan bahwa kondisi lereng dikategorikan aman dan stabil, sehingga tidak berpotensi mengalami kelongsoran pada kondisi pembebanan yang dianalisis.
Financial Performance Assessment of Flat Buildings Using Life Cycle Cost and Cost–Benefit Analysis Griselda Junianda Velantika; Reguel Mikhail; Karina Meilawati Eka Putri; Elok Dewi Widowati; Rizqi Alghiffary; Muhamad Fauzan Akbari
Advance Sustainable Science Engineering and Technology Vol. 7 No. 1 (2025): November-January
Publisher : Science and Technology Research Centre Universitas PGRI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26877/asset.v7i1.1005

Abstract

Buildings resulting from construction projects are durable assets and decisions related to construction projects have enduring impacts. In many cases, building owners prioritize only the initial costs, such as building design, construction, and equipment costs, while neglecting the future operation and maintenance costs. This research studies life cycle costing (LCC) analysis to evaluate the financial feasibility of urban housing. The LCC calculates all the costs incurred and benefits during the building's operation. The cost is generated from construction, operational, and maintenance costs. At the same time, the benefit breaks down into flat rental costs, retail rental costs, and parking costs. The costs incurred are estimated over 25 years, and the parameters of feasibility are net Present Value (NPV), Benefit-Cost Ratio (BCR), and Internal Rate of Return (IRR). The study generates negative NPV, BCR < 1, and 0.61% of IRR. It indicates that the project is not feasible. This research gives alternatives to make the project feasible. This study employed a trial-and-error approach to ascertain the viability of investing in flat rentals by systematically adjusting rental rates. Incremental adjustments to rental rates are tested by a series of rate hikes of 50%, 100%, 150%, and 200% using a trial-and-error approach. The project will become feasible if the flat rate increases to 150-200% of the initial rental rate.
Comparison of Bored Pile Capacity Based on Analytical Design and Pile Load Test – A Case Study Karina Meilawati Eka Putri; Aulia Dewi Fatikasari; Hendrata Wibisana
International Journal of Engineering, Science and Information Technology Vol 5, No 1 (2025)
Publisher : Malikussaleh University, Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52088/ijesty.v5i1.659

Abstract

This paper presents a comparative study of bored pile ultimate capacity based on analytical design and field tests. The object of this analysis is the bored pile foundation of the Sei Alalak Bridge in Banjarmasin, Indonesia. The analytical design of pile ultimate capacity was carried out using the empirical methods provided by Reese and O'Neill (1988) and Meyerhof (1976). The calculation of pile ultimate capacity using the empirical method is based on SPT data from four boreholes representing soil data in the abutment, tower, and counterweight zones. Two pile load tests were used to validate the analytical design: pile driving analysis (PDA) and the bi-axial load test Osterberg Cell (O-Cell). The pile ultimate capacity from the empirical method is then compared to field tests regarding pile shaft resistance and end-bearing capacity. The analysis results indicate that the empirical methods tend to underestimate the pile's ultimate capacity by 30–60%. The results reveal that the Reese and O'neill (1988) empirical method generates a significantly lower pile ultimate capacity than Meyerhof (1976). This indicates that the Meyerhof (1976) method gives a closer result of pile ultimate capacity than the field test. On the contrary, the Reese and O'Neill (1988) method is more consistent with the PDA test results. As a result, in this study, the Reese and O'Neill (1988) method is preferred over the Meyerhof (1976) method for predicting the ultimate capacity of a bored pile since it has been demonstrated to be more reliable in estimating the pile's ultimate capacity.
Co-Authors Ali Zainal Abidin Isa Alhabsyi Alivia Wulan Yufika Andhika Sahadewa, Andhika Arasi Arahman Ary, Wim Ramartsa Aryaseta, Bagas Aulia Dewi Fatikasari Ayu Fatimah Sari Bambang Wasito Dian Purnamawati Solin Dimas Bagus Prasetyo Dwi Cahya, Maulana Zidan Elang Wijaya Kusuma Elok Dewi Widowati Endra Susila Fatika Putri Setianingsih Griselda Junianda Velantika Griselda Junianda Velantika Griselda Junianda Velantika Hendrata Wibisana Ifthar Ramadhana W Ika Salsabila Nurahida Karina Jelita Putri Kemal Aziz Khafidh, Syarif Nur Kresno Wikan Sadono M Naufal Ramadhan Naufal Miguel Felix Wijaya Muhamad Fauzan Akbari Rani Ardiansyah Ardjito Reguel Mikhail Rizqi Alghiffary Rizqi Alghiffary Sanhaji, Salsabila Faranande Septiono, Wisnu Panji Syahputra, Aldy Vio Aditya Pratama Wijaya Zulkifli, Ediansjah