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All Journal U Karst Portal: Jurnal Teknik Sipil Andalasian International Journal of Applied Science, Engineering, and Technology JUITECH: Jurnal Ilmiah Fakultas Teknik Universitas Quality Blend Sains Jurnal Teknik Innovative: Journal Of Social Science Research Buletin Utama Teknik VISA: Journal of Vision and Ideas Jurnal Pengabdian Mitra Masyarakat
Wulandari, Tika Ermita
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Potensi Likuifaksi Pada Proyek Pengembangan Infrastruktur Jalan Di Bandara Kualanamu Berdasarkan SNI 1726 : 2019 Hutagaol, Samuel Parlindungan; Wulandari, Tika Ermita
JUITECH: Jurnal Ilmiah Fakultas Teknik Universitas Quality Vol 8, No 1 (2024)
Publisher : Universitas Quality

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36764/ju.v8i1.1315

Abstract

Pakam is an area close to Belawan and is also on the coast of North Sumatra which directly faces the Malacca Strait. Based on the land distribution map, Pakam is an area with silt soil, organic soil, peat soil and sand. The characteristics of these four soils are that they have a very low soil carrying capacity, because they contain a lot of water. However, in this coastal area, a road infrastructure development project was built at Kualanamu Airport, changing water to land to replace the old airport in an area that contains a lot of water. The aim of this research is to find out whether there is potential for liquefaction in the project when an earthquake occurs at magnitudes 6.5 SR, 7.5 SR and 8.0 SR and this makes researchers interested in analyzing whether liquefaction occurs in the project area. The research method used is using primary data from project bore log data, then secondary data using data from SNI 1726: 2019 and the PUskim PU Spektra Design website. The research flow is to take soil data from the project and earthquake data according to SNI 1726: 2019 and use earthquake data from Puskim PU Indonesian Spectra Design, then the liquefaction potential analysis calculation method uses the Young-Idriss method and the Idriss Boulanger method. From the results of the calculation analysis, liquefaction did not occur at a depth of 1.50 – 22.95 m at BH.01 and BH.04 based on SNI 1726: 2019 and also based on the Indonesian Puskim PU Spectra Design even though the soil type was dominantly sand and silt.
ANALISIS PENINGKATAN INDEKS PROPERTIES PADA TANAH LEMPUNG ORGANIK MENGGUNAKAN CAMPURAN ABU SEKAM PADI william, Jean; Wulandari, Tika Ermita
JUITECH: Jurnal Ilmiah Fakultas Teknik Universitas Quality Vol 8, No 1 (2024)
Publisher : Universitas Quality

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36764/ju.v8i1.1323

Abstract

Soil is one of the important materials in building a construction. In construction construction, there are many conditions of very low soil carrying capacity, one way to increase the carrying capacity of the soil so that soil stability increases is by mixing rice husk ash. The method used in the rice husk mixture is an experimental method, namely the calculation of water content obtained an average moisture content of 73.17%. The results of the specific gravity analysis obtained an average soil specific gravity of 2.17 grams. The results of the soil liquid boundary analysis were 59.627%, with an additional mixture of rice husk ash of 3% to 55.15% and additional use of rice husk ash of 9% to 51.37%. The results of the analysis of soil plastic boundaries obtained soil plastic limits of 27.67%, with the addition of a mixture of rice husk ash 3% to 32.20% and additional use of rice husk ash 9% to 38.40%. Conclusion Soil in using a mixture of rice husk ash can improve soil stability and soil properteis index improved when mixed with rice husk ash
Simulation of Ground Settlement Using Plaxis for the Pekanbaru-Padang Toll Road Construction Project: A Detailed Analysis Saragih, Muhammad Sultan Mubaraq; Wulandari, Tika Ermita
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 4 No. 3 (2024): November 2024
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v4i3.181

Abstract

Geotechnical issues often include settlement and soil bearing capacity, which serve as the foundation for toll roads. Each toll road is designed with specific loads and elevations, which sometimes cannot be supported by the consolidation of the existing soil due to the soft soil characteristics. Soil improvement methods such as replacement (soil material replacement) and preloading are commonly used to enchace the shear strength of soft soils. This analysis aims to evaluate and compare the amount of consolidation settlement analytically using modeling in Plaxis 2D with a very fine mesh type, using settlement plate data from the field. The analysis compares the amount of consolidation settlement through Plaxis 2D modeling with a very fine mesh type and field settlement plate data. From the analysis the consolidation time using Plaxis 2D modeling is found to be 149 days, while the settlement time from the settlement plate data is 39 days. The consolidation settlement obtained from the plaxis 2D model with a very fine mesh is 0.056 meters, whereas the settlement from the settlement plate data is 0.416 meters, with a percentage difference of 86.53%. It can be concluded that the significant difference between the field data and the Plaxis 2D analysis results is due to the lack of data available for each soil layer.
Comparative Analysis of Analytical and Numerical Methods on the Safety Factor of Retaining Walls Akbar, Aulia; Wibowo, Tommy Prasetyo; Wulandari, Tika Ermita
UKaRsT Vol. 8 No. 2 (2024): NOVEMBER
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/ukarst.v8i2.5966

Abstract

The stability of retaining walls is a major concern in geotechnical design, especially in landslide-prone areas such as Indonesia. A comprehensive analysis requires an in-depth understanding of the failure mechanism and the factors that influence its stability. Therefore, a comparison of various analytical and numerical methods in the stability of retaining walls is an important step to determine the most effective approach. The data were collected through laboratory tests and field investigations of soil properties. The retaining wall design was modeled using Plaxis and Midas software. The analysis focused on comparing the safety factor values obtained from the Rankine method with those derived from Plaxis and Midas simulations. The results show that Rankine provides a high safety factor, namely 2.54 for rotation and 2.447 for shear. Rankine, although simple, remains relevant for uniform soil conditions. Plaxis can provide more detailed deformation and pressure distribution predictions with a safety factor reaching 2.95 in the third excavation stage. Meanwhile, Midas provides a comprehensive analysis of axial force and bending moment with a safety factor value that tends to be smaller. This study provides new insights into how each method can be used effectively for different technical conditions, and provides practical guidelines for geotechnical planners in choosing the appropriate analysis method to improve the efficiency and safety of retaining wall design.
Simulation of Ground Settlement Using Plaxis for the Pekanbaru-Padang Toll Road Construction Project: A Detailed Analysis Saragih, Muhammad Sultan Mubaraq; Wulandari, Tika Ermita
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 4 No. 3 (2024): November 2024
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v4i3.181

Abstract

Geotechnical issues often include settlement and soil bearing capacity, which serve as the foundation for toll roads. Each toll road is designed with specific loads and elevations, which sometimes cannot be supported by the consolidation of the existing soil due to the soft soil characteristics. Soil improvement methods such as replacement (soil material replacement) and preloading are commonly used to enchace the shear strength of soft soils. This analysis aims to evaluate and compare the amount of consolidation settlement analytically using modeling in Plaxis 2D with a very fine mesh type, using settlement plate data from the field. The analysis compares the amount of consolidation settlement through Plaxis 2D modeling with a very fine mesh type and field settlement plate data. From the analysis the consolidation time using Plaxis 2D modeling is found to be 149 days, while the settlement time from the settlement plate data is 39 days. The consolidation settlement obtained from the plaxis 2D model with a very fine mesh is 0.056 meters, whereas the settlement from the settlement plate data is 0.416 meters, with a percentage difference of 86.53%. It can be concluded that the significant difference between the field data and the Plaxis 2D analysis results is due to the lack of data available for each soil layer.
Pengaruh Fly Ash terhadap Kekuatan Ikatan Campuran Aspal Syahputra, Ananda; Wulandari, Tika Ermita
Blend Sains Jurnal Teknik Vol. 3 No. 4 (2025): Edisi April
Publisher : Ilmu Bersama Center

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56211/blendsains.v3i4.780

Abstract

Penelitian ini bertujuan untuk mengevaluasi pengaruh penambahan fly ash terhadap kekuatan ikatan dan ketahanan lingkungan campuran aspal. Menggunakan pendekatan kuantitatif eksperimental dengan rancangan acak lengkap, variasi proporsi fly ash sebesar 0%, 5%, 10%, dan 15% diuji melalui Marshall Stability and Flow Test, analisis Scanning Electron Microscope (SEM), serta uji ketahanan terhadap air dan suhu tinggi. Hasil menunjukkan bahwa proporsi optimal fly ash sebesar 10% menghasilkan stabilitas mekanik tertinggi, densitas maksimal, dan nilai Tensile Strength Ratio terbaik. Analisis SEM mengungkapkan bahwa partikel fly ash efektif mengisi pori mikro, memperkuat kohesi internal, dan memperbaiki ikatan antarfasial agregat-aspal. Campuran dengan fly ash juga menunjukkan ketahanan unggul terhadap kelembaban dan deformasi termal, memperpanjang umur layanan perkerasan. Secara ekonomis dan ekologis, penggunaan fly ash mampu mengurangi kebutuhan filler konvensional dan menurunkan jejak karbon dalam konstruksi jalan. Penelitian ini memberikan kontribusi signifikan dalam pengembangan material perkerasan berkelanjutan dan menawarkan pendekatan teknis yang aplikatif untuk industri konstruksi jalan.
Analisis Modulus Geser Tanah Berdasarkan Data Cone Penetration Test pada Proyek Rumah Sakit Madani Medan Abdinata, Dwi Jaya; Wulandari, Tika Ermita
Portal: Jurnal Teknik Sipil Vol 17, No 1 (2025): April Edition
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/portal.v17i1.6712

Abstract

Penelitian ini bertujuan untuk menganalisis nilai modulus geser tanah berdasarkan data Cone Penetration Test (CPT) pada proyek pembangunan Rumah Sakit Umum Madani Medan. Modulus geser merupakan parameter penting dalam geoteknik yang mencerminkan kekakuan tanah terhadap gaya geser. Metode yang digunakan adalah pendekatan empiris dengan menghitung modulus elastisitas (E) dari nilai cone resistance (qc), kemudian menghitung modulus geser (G) menggunakan hubungan elastisitas linier G = E/2(1 + 2μ), dengan asumsi rasio Poisson (μ) sebesar 0,3. Nilai E diperoleh dari rumus E=α⋅qc dengan α = 4, mengacu pada klasifikasi tanah keras. Hasil pengujian CPT menunjukkan bahwa lapisan tanah keras berada pada kedalaman 9,20 hingga 11,00 meter, dengan nilai G berkisar antara 24.026 hingga 25.004 kPa. Berdasarkan hasil tersebut, disarankan penggunaan pondasi dalam (tiang pancang atau tiang bor) dengan kedalaman hingga 11 meter untuk mencapai lapisan tanah keras secara optimal.
Evaluasi Jaringan Irigasi Saluran Sekunder pada Daerah Irigasi Kerasaan Kabupaten Simalungun Purba, Musa Affandy; Wulandari, Tika Ermita
Portal: Jurnal Teknik Sipil Vol 17, No 1 (2025): April Edition
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/portal.v17i1.6855

Abstract

The Kerasaan Irrigation Area is an irrigation area located in Simalungun Regency, North Sumatra Province. With a functional area of 5000 (Ha) and a secondary irrigation channel area of 39.10 (km). In optimizing irrigation performance in the DI Kerasaan irrigation area, irrigation network infrastructure maintenance must be carried out, one of which is by evaluating the irrigation channels in the area. This evaluation aims to determine and analyze the condition and function of irrigation assets in the Kerasaan irrigation area, so that the function of the irrigation channels can be optimized to irrigate the lands in the irrigation area. The method used in evaluating the irrigation channel is the observation method by tracing the irrigation network using a GPS device to determine the coordinates of the channel points and documenting asset damage with a camera/mobile phone. Based on the results of the analysis, the total length of damage to the paired channel structure was 10 m from a combination of several segments in 2 channel sections in the secondary channel with a total damage index of 0.70%. In the secondary Kerasaan channel from the survey results as far as (±1000 m) in the field there are 2 units of buildings for tapping and 3 units for tapping. The results of the analysis can be used for planning the construction of irrigation structures by planning structural buildings, water gates and measuring buildings.
Study Comparative Stability of Dam Body with Geomembrane Core Material using GeoStudio Application Nainggolan, Unicolas Satria Oktavianus; Wulandari, Tika Ermita
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 4 No. 1 (2024): March 2024
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v4i1.105

Abstract

The availability of embankment material and the quality of the material is one of the problems in planning a dam, especially impermeable material which must be watertight. With the GeoStudio application, the dam will be modeled to observe the stability of the dam, especially against landslides and seepage. Modeling I is modeled with core zone material using upstream borrow clay material and modeling II using downstream borrow clay material. Modeling III and IV used the same core material with the addition geomembrane material between the transition zone and the upstream filter. The geomembrane was added to observe and compare the effect of use on the stability. The weir body was analyzed under conditions when the weir body was completed, flood water level, normal water level, low water level and rapid drawndown water condition. Modeling III with upstream borrow clay material and geomembrane between the transition zone and upstream filter is the design with the best stability with the most critical avalanche safety factor of 2.459 downstream of the weir under flood water level conditions. The seepage discharge downstream of the weir is 0.0017 m³/dt/m and the maximum seepage discharge is 0.0026 m³/dt/m under flood water level conditions.
PENGARUH PENAMBAHAN ABU SEKAM PADI TERHADAP INDEKS PLASTISITAS PADA TANAH LEMPUNG Sianturi, Pernando Wijaya; Wulandari, Tika Ermita
Buletin Utama Teknik Vol 21, No 1 (2025): Edisi September
Publisher : Universitas Islam Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30743/but.v21i1.12138

Abstract

Tanah lempung dikategorikan sebagai tanah kohesif dengan daya dukung yang relatif rendah, serta memiliki sifat kembang susut yang signifikan dan deformasi tinggi, terutama saat terjadi perubahan kadar air. Sifat ini menjadikan tanah lempung kurang ideal untuk digunakan secara langsung sebagai material dasar konstruksi jalan. Sebagai respons terhadap permasalahan tersebut, penelitian ini dilakukan dengan menerapkan metode stabilisasi menggunakan bahan aditif alternatif berupa abu sekam padi, yang merupakan limbah biomassa dengan kandungan silika cukup tinggi dan berpotensi sebagai bahan stabilisasi tanah. Penelitian ini dilaksanakan dalam dua tahapan utama, yaitu pengujian karakteristik fisik tanah dan pengujian batas konsistensi (Atterberg limits) untuk menilai perubahan sifat plastisitas akibat penambahan abu sekam. Hasil pengujian menunjukkan bahwa penambahan abu sekam padi berkontribusi terhadap penurunan nilai batas cair tanah lempung, dari 59,62% pada kondisi awal menjadi 56,65% pada campuran 3%, dan menurun lebih signifikan hingga 45,28% pada campuran 9%. Penurunan ini diindikasikan sebagai akibat dari proses pemadatan mikrostruktur tanah yang dipengaruhi oleh efek pengisian pori dan pengikatan partikel lempung oleh partikel abu. Sementara itu, nilai batas plastis mengalami peningkatan dari 29,73% menjadi 31,47% pada campuran 3% dan 38,08% pada campuran 9%. Fenomena ini mencerminkan terjadinya reaksi ionik antara kalsium dari abu dan mineral lempung yang memicu proses flokulasi dan agregasi partikel tanah. Dengan menurunnya indeks plastisitas sebagai hasil dari penurunan batas cair dan kenaikan batas plastis, maka dapat disimpulkan bahwa tanah mengalami penurunan kohesi dan peningkatan stabilitas plastis. Secara keseluruhan, pemanfaatan abu sekam padi terbukti efektif dalam memperbaiki karakteristik plastisitas tanah lempung, dan membuka peluang pemanfaatan material limbah sebagai alternatif stabilisator tanah dalam konstruksi teknik sipil.
Co-Authors Abdinata, Dwi Jaya Aulia Akbar Hutagaol, Samuel Parlindungan Kamaluddin Kamaluddin Mahda, Nuril Marwan Marwan Nainggolan, Unicolas Satria Oktavianus Purba, Musa Affandy Ramadhan, Fikri Saragih, Muhammad Sultan Mubaraq sari, Nela Permata Sianipar, Aris Julianto Sianturi, Pernando Wijaya Syahputra, Ananda Wibowo, Tommy Prasetyo william, Jean