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All Journal Journal of Engineering and Technological Sciences Teknika: Jurnal Sains dan Teknologi Fondasi: Jurnal Teknik Sipil Civil Engineering For Community Development
Ina Asha Nurjanah
Universitas Sultan Ageng Tirtayasa
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Transportation

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The utilization of lime and plastic sack fiber for the stabilization of clay and their effect on CBR value Enden Mina; Woelandari Fathonah; Rama Indera Kusuma; Ina Asha Nurjanah
Jurnal Teknika Vol 17, No 2 (2021): Available Online in November 2021
Publisher : Faculty of Engineering, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/tjst.v17i2.13025

Abstract

The soil of Kubang Laban Road at Terate Village, Kramatwatu-Serang district, can be classified as a clay soil type with a low bearing capacity with a field California Bearing Ratio (CBR) value of 2.16%. Therefore it is necessary to improve the soil, which is stabilization using added lime and plastic sack fiber. This study used variations of Plastic sacks fiber content 0%; 0.2%; 0.4%; 0.6% and 0.8% with the addition of 10% lime for each variation of the total dry weight of the soil. This study determines how adding plastic sack fiber and lime in the subgrade soil affects the CBR value and physical properties. The soil classification system used is based on the unified soil classification system (USCS). The results showed that the original soil was classified as OH type, organic clay with high plasticity. Thus, soil stabilization with plastic sack fiber and lime may reduce the IP and enhance the CBR. With 0.2 percent plastic sack fiber and 10% lime, the greatest CBR value was 41.78 percent. The optimum CBR value obtained meets the requirements for a road construction subgrade. Tanah di Jalan Kubang Laban Desa Terate Kecamatan Kramatwatu-Serang dapat tergolong jenis tanah lempung yang memiliki daya dukung rendah dengan nilai california bearing ratio (CBR) lapangan rendah  yaitu 2.16%, sehingga perlu dilakukan perbaikan tanah. Salah satu cara perbaikan tanah adalah dengan penambahan kapur dan serat karung plastik. Penelitian ini bertujuan untuk mengetahui pengaruh penambahan serat karung plastik dan kapur pada tanah dasar terhadap nilai CBR dan sifat fisiknya. Penelitian menggunakan variasi kadar serat karung plastik 0%; 0,2%; 0,4%; 0,6% dan 0,8% dengan penambahan kapur 10% untuk setiap variasi berat kering total tanah. Sistem klasifikasi tanah yang digunakan didasarkan pada sistem klasifikasi Unified Soil Classification System (USCS). Hasil penelitian menunjukkan bahwa tanah asli tergolong jenis OH, lempung organik dengan plastisitas tinggi. Stabilisasi tanah dengan menggunakan karung plastik fiber dan kapur dapat menurunkan nilai indeks plastisitas (IP) dan meningkatkan nilai CBR. Berdasarkan hasil pengujian CBR, nilai CBR tertinggi diperoleh pada variasi serat karung plastik 0,2% dengan kapur 10% sebesar 41,78%. Nilai CBR optimum yang diperoleh memenuhi persyaratan untuk tanah dasar konstruksi jalan.
Variability of N-SPT-Correlated Undrained Shear Strength of Alluvial Deposit in Doplang Region, Central Java, Indonesia Sugeng Krisnanto; Masyhur Irsyam; Rendy Dwi Kartiko; Arif Rahman Hakim Sitepu; Mohammad Anwar Fathoni; Ina Asha Nurjanah; Shafira Annisa Putri; Lindawati Lindawati; Maudy Anisa Fanani; Alexander Wicaksono Budiarto; Idrus Muhammad Alatas
Journal of Engineering and Technological Sciences Vol. 55 No. 6 (2023)
Publisher : Directorate for Research and Community Services, Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.eng.technol.sci.2023.55.6.3

Abstract

The need to better quantify the variability of soil shear strength and its relations with the factor of safety is increasing in Indonesia. However, this aspect has not yet been studied thoroughly. This paper presents an attempt to quantify the variability of undrained shear strength in relation with the factor of safety of an alluvial deposit in the Doplang region, Central Java, Indonesia. A relationship between the undrained shear strength, su, and N-SPT for the deposit was found as su = 3.4 N-SPT. The variability of the undrained shear strength was quantified utilizing the coefficient of variance, s/m (the sample standard deviation, s over the mean, m) of the N-SPT correlated undrained shear strength. The variability of the undrained shear strength was investigated for the soil near ground surface. The deposit had a value of s/m ranging from 0.15 to 0.25 near ground surface. The variation of s/m tended to follow normal and lognormal distributions. Relationships among the coefficient of variance, the probability of failure, and the factor of safety in terms of soil strength for normal and lognormal distributions were developed. For the value of s/m near ground surface, the relationship between the probability of failure and factor of safety was obtained.
Pemberdayaan Masyarakat melalui Pelatihan Pembuatan Paving Block dari Limbah Fly Ash di Desa Lontar Kabupaten Tangerang Fathonah, Woelandari; Mina, Enden; Kusuma, Rama Indera; Darwis, Zulmahdi; Soelarso, Soelarso; Baehaki, Baehaki; Nurjanah, Ina Asha; Rahma, Midia; Radityagifari, Muhamad
Civil Engineering for Community Development (CECD) Vol 3, No 2 (2024): Edisi Oktober 2024
Publisher : Department of Civil Engineering Faculty of Engineering, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36055/cecd.v3i2.29114

Abstract

Limbah fly ash dari Pembangkit Listrik Tenaga Uap (PLTU) Lontar, Serang, Banten, merupakan sisa pembakaran batu bara yang berpotensi mencemari lingkungan jika tidak dikelola dengan baik. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk memanfaatkan limbah tersebut melalui pelatihan pembuatan paving block bagi warga Desa Lontar. Metode yang digunakan dalam pelatihan meliputi pemberian teori dan praktik langsung mengenai persiapan bahan baku, pencampuran material, teknik pencetakan, serta pengeringan paving block. Pelatihan juga menekankan pentingnya keselamatan kerja dan pengelolaan lingkungan selama proses produksi. Hasil dari kegiatan ini menunjukkan peningkatan keterampilan warga dalam memanfaatkan fly ash menjadi paving block yang bernilai ekonomis. Beberapa peserta berencana mengembangkan produksi ini secara mandiri, baik untuk memenuhi kebutuhan desa maupun untuk dijual ke pasar yang lebih luas. Kegiatan ini diharapkan dapat meningkatkan kesejahteraan ekonomi masyarakat sekaligus mengurangi dampak negatif limbah industri terhadap lingkungan.
Study of Equilibrium Time in Wetting Soil-Water Characteristics Curves (SWCC) using Capillarity Column Method Nurjanah, Ina Asha; Kusumah, Rama Indera; Mina, Enden; Fathonah, Woelandari; Abdurohim, Abdurohim
Jurnal Fondasi Vol 14, No 1 (2025)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fondasi.v14i1.32281

Abstract

The soil-water characteristic curve (SWCC) of soil plays the key roll in unsaturated soil mechanics which is a relatively new field. To encourage the geotechnical engineers to apply unsaturated soil mechanics theories in routine practice, numerical methods, based on the SWCC and saturated soil properties, have been developed to predict unsaturated permeability function and unsaturated shear strength properties which are expensive, time consuming, and it may require specials techniques or apparatus to measure the SWCC in laboratories. However, it is important to have laboratory measured data of SWCCs to enhance and verify the proposed numerical methods. Hence, employing the capillary column method which applies the tempe cell pressure principle, namely varying the matric suction value, this study aims to obtain the water content in each matric sauction variation which is then presented in SWCC form. Saturated permeability is obtained from constant head test. Permeability function is calculated indirectlt by Fredlund and Rahardjo method (1993) using SWCC and saturated permeability. 
Landslide Potential Analysis using Geographic Information System and Analytical Hierarchy Process (AHP) (Case Study: Taktakan District, Serang City) Mina, Enden; Fathonah, Woelandari; Kusumah, Rama Indera; Nurjanah, Ina Asha; Rafsanjaya, Aditiya
Jurnal Fondasi Vol 14, No 1 (2025)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fondasi.v14i1.32283

Abstract

This research aims to analyze the landslide potential in Taktakan Sub-district, Serang City, which is prone to landslides due to geographical and hydrometeorological factors. The analysis was conducted using Geographic Information System (GIS) method with QGIS software and Weighted Linear Combination (WLC) approach combined with Analytical Hierarchy Process (AHP). Factors causing landslides, such as slope, rainfall, geology, and land use, were analyzed based on the weights obtained from respondents' questionnaires. The results showed that rainfall has the greatest influence (42%), followed by slope (37%), geology (11%), and land use (10%). The highest landslide potential is found in Taktakan sub-district, with the dominant vulnerability level in the medium class (50.73%), while the high and very high risk areas are 20.65% and 3.66%, respectively. This study concludes that high rainfall and steep slopes are the main factors that increase the risk of landslides in the area
Analysis of Liquefaction Potential Based on Standard Penetration Test (SPT) Data (Case Study: Transit Oriented Development Project in East Jakarta) Enden Mina; Rama Indera Kusuma; Woelandari Fathonah; Ina Asha Nurjanah; Prastika Wahid Santoso; Bayu Darmawan
Jurnal Fondasi Vol 15, No 1 (2026)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fondasi.v15i1.39878

Abstract

Liquefaction is a phenomenon in which solid soil becomes liquid, affecting soil stability due to an increase in pore water pressure. Liquefaction can cause damage to building structures and infrastructure, potentially resulting in significant losses. An analysis of liquefaction potential is required and is conducted using field Standard Penetration Test data. The method used is based on the approach developed by Seed and Idriss using SPT data. This study aims to determine the Safety Factor (FS) against liquefaction by comparing the Cyclic Stress Ratio (CSR) and the Cyclic Resistance Ratio (CRR). Soil layers are categorized as having liquefaction potential if the obtained FS value is less than one. The results show that the soil profile at the study location consists of medium to stiff clay and medium to dense sand, as indicated by relatively high average N-SPT values. The SPT calculations produce high CRR values, and the CSR values at the study location are also relatively high. This is caused by the earthquake acceleration value obtained from the DEEPSOIL software, which is 0.4 g. The safety factor values at the study location range from 0.4 to 0.8 at all SPT points, where FS values less than 1 indicate that the soil has the potential to undergo liquefaction.
Comparative Evaluation of Seismic Response and Structural Performance of Two-Story Building Using Equivalent Static and Response Spectrum Methods Midia Rahma; Zikra Fauzan Virawan; Mahdika Putra Nanda; Ina Asha Nurjanah
Jurnal Fondasi Vol 15, No 1 (2026)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fondasi.v15i1.39673

Abstract

Seismic response analysis of building structures is essential, as different analytical approaches may produce varying predictions of structural behavior under earthquake loading. This study aims to compare the seismic response of a two-story building using two linear analysis methods, namely equivalent static analysis and response spectrum-based dynamic analysis. A three-dimensional structural model was developed using structural analysis software to evaluate key parameters, including natural period, base shear, and inter-story drift. The results indicate that the dynamic analysis produces higher base shear and lateral displacement compared to the static method. These differences suggest that the dynamic approach is more capable of representing realistic structural behavior by accounting for natural vibration characteristics and spectral acceleration. The findings highlight that dynamic effects play a significant role in determining structural response, even for low-rise buildings. Therefore, the application of dynamic analysis is recommended to improve the accuracy of seismic performance evaluation and structural design.
Study of Granular Soil Behavior under Different Drainage Conditions Ina Asha Nurjanah; Rama Indera Kusuma; Enden Mina; Woelandari Fathonah; Prastika Wahid Santoso; Midia Rahma; Abdurohim Abdurohim
Jurnal Fondasi Vol 15, No 1 (2026)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fondasi.v15i1.39876

Abstract

Granular soils, such as sand and gravel, exhibit distinct mechanical behavior depending on drainage conditions during loading. This study aims to evaluate the influence of drained and undrained conditions on shear strength, deformation characteristics, and pore water pressure response of granular soils through a comprehensive literature review. The research is grounded in classical soil mechanics theories and recent studies, without conducting laboratory testing, and instead focuses on a comparative analysis of previous findings.The results indicate that under drained conditions, granular soils generally exhibit higher shear strength due to the absence of excess pore water pressure, allowing effective stress to govern soil behavior. Dense granular soils tend to exhibit dilative behavior, which contributes to increased strength and stability. In contrast, under undrained conditions, the inability of pore water to dissipate leads to the generation of excess pore water pressure, reducing effective stress and shear strength. This condition is particularly critical in loose saturated sands, where contractive behavior may trigger instability or liquefaction.Furthermore, this study contributes by providing a conceptual synthesis that integrates effective stress, pore water pressure, and deformation behavior into a unified framework for understanding granular soil response under different drainage conditionsmore reliable and safer geotechnical engineering practices.
Field Testing and Concrete Quality Analysis for Column, Beam and Floor Slab Structures at Siloam Silampari Hospital, Lubuk Linggau City using the Ultrasonic Pulse Velocity (UPV) Method M. Hasbi Zuher; Zulmahdi Darwis; Soelarso Soelarso; Baehaki Baehaki; Midia Rahma; Abdurohim Abdurohim; Arief Budiman; Ina Asha Nurjanah
Jurnal Fondasi Vol 15, No 1 (2026)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fondasi.v15i1.41195

Abstract

The construction of tall buildings is inextricably linked to various quality standards, which are used to create safe and comfortable buildings for occupants, users, and surrounding buildings. Concrete quality testing is one of the necessary tests performed on construction projects to ensure that towers or tall buildings comply with existing standards and regulations. Testing concrete structures after casting is crucial to ensure they conform to the intended design. Various types of testing can be performed, including non-destructive testing (NDT), semi-destructive testing (SDT), and destructive testing (DT). In this study, we used the Ultrasonic Pulse Velocity (UPV) testing method. Concrete testing using UPV is one of the tests that is more widely used because of the satisfactory results using ultrasonic waves and requires relatively low costs compared to other testing methods. The results obtained were in the Good Concrete Quality Category from the total sample of test points. The minimum concrete compressive strength requirement is 21 MPa for special structural concrete quality based on SNI-2847-2019.
IDENTIFIKASI KERENTANAN ASET PUBLIK PADA KUA KECAMATAN PONTANG Ina Asha Nurjanah; Midia Rahma; Enden Mina; Rama Indera Kusuma; Woelandari Fathonah; Prastika Wahid Santoso; Soelarso Soelarso; Abdurohim Abdurohim; Safira Aprilya Putri Setyana; Muhammad Dananiri; Muhammad Bintang Rangga Permana; Raihan Naufal Hakim; Muhammad Rakha Revaldo; Robby Firman Hidayat; Didied Haryono
Civil Engineering for Community Development (CECD) Vol 5, No 1 (2026): Edisi April 2026
Publisher : Department of Civil Engineering Faculty of Engineering, Universitas Sultan Ageng Tirtayasa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/cecd.v5i1.41160

Abstract

Aset publik pada instansi pemerintah memiliki peran penting dalam menunjang pelayanan kepada masyarakat, sehingga kondisi fisik struktur bangunan perlu dipastikan dalam keadaan aman dan layak fungsi. Kantor Urusan Agama (KUA) Kecamatan Pontang sebagai salah satu fasilitas pelayanan publik memerlukan identifikasi terhadap kerentanan aset, khususnya dari aspek fisik struktur bangunan. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk mengidentifikasi tingkat kerentanan aset publik berdasarkan kondisi eksisting di lapangan. Metode yang digunakan meliputi tahapan persiapan melalui pelatihan enumerator, survei lapangan untuk pengumpulan data kondisi fisik bangunan, serta analisis berdasarkan hasil pengamatan visual terhadap elemen struktur. Parameter yang diamati mencakup kondisi komponen struktur seperti kolom, balok, dinding, dan atap, termasuk indikasi kerusakan seperti retak, deformasi, dan penurunan kualitas material. Hasil identifikasi menunjukkan adanya variasi tingkat kerentanan pada beberapa bagian bangunan yang dipengaruhi oleh kondisi fisik dan usia bangunan. Kegiatan ini memberikan gambaran awal mengenai kondisi fisik aset publik di KUA Kecamatan Pontang sebagai dasar informasi dalam pengelolaan aset, tanpa memberikan rekomendasi tindak lanjut.
Co-Authors Abdurohim Abdurohim Abdurohim, Abdurohim Alexander Wicaksono Budiarto Arief Budiman Baehaki, Baehaki Bambang Adhi Priyambodho Bayu Darmawan Darwis, Zulmahdi Didied Haryono Enden Mina, Enden Fathonah, Woelandari Fathonah, Woelandari Fathonah, Woelandari Idrus Muhammad Alatas Kartiko, Rendy Dwi Kusuma, Rama Indera Kusumah, Rama Indera Lindawati Lindawati M. Hasbi Zuher Mahdika Putra Nanda Masyhur Irsyam Maudy Anisa Fanani Mekro Permana Pinem Midia Rahma Mina, Enden Mina, Enden Mohammad Anwar Fathoni Muhammad Bintang Rangga Permana Muhammad Dananiri Muhammad Fakhruriza Pradana, Muhammad Fakhruriza Muhammad Hasbi Zuher Muhammad Rakha Revaldo Ngakan Putu Purnaditya Prastika Wahid Santoso Radityagifari, Muhamad Rafsanjaya, Aditiya Raihan Naufal Hakim Rama Indera Kusuma Restu Wigati, Restu Robby Firman Hidayat Safira Aprilya Putri Setyana Shafira Annisa Putri Sirajuddin Sirajuddin Sitepu, Arif Rahman Hakim Soelarso Soelarso, Soelarso Soelarso, Soelarso Sugeng Krisnanto Syahdan Raihan Wiwien Suzanti Zikra Fauzan Virawan