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Dendi Yogaswara
Institut Teknologi Garut
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Perencanaan Dewatering Pembangunan Gedung Fasilitas Pengembangan Produk Skala Pilot Bio Farma Dendi Yogaswara; Nurholisah
Jurnal Konstruksi Vol 24 No 1 (2026): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.24-1.1656

Abstract

Dewatering is used to lower the groundwater level in order to prevent uplift forces from interfering with construction work. Dewatering is generally used in the construction of high-rise buildings that will usually add a basement floor. The purpose of this study is to determine the need for pumps based on the excavation area, soil type and the amount of water that must be released based on the rain intensity of the Bandung area using the predrainage method. The case study in this research is a 13-story building in the construction project of a pilot-scale product development building (building No. 34) of PT Bio Farma (Persero). The calculation results show that the soil type is inorganic clay with high plasticity and based on the excavation zone of ± 1,516.52 m2 which is divided into three zones, the pump requirements for dewatering work require 3 pumps in each excavation zone with a pump capacity of 150 liters/minute. The amount of water that must be released based on rain intensity data of the Bandung area ± 50 mm obtained the result of 60 m3 / hour.
Analisis Stabilitas Dan Alternatif Perkuatan Lereng Dengan Geomat Menggunakan Metode Elemen Hingga Dendi Yogaswara; Bima Guna Bhakti
Jurnal Konstruksi Vol 24 No 1 (2026): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.24-1.1811

Abstract

Landslides are natural disasters that can result in loss of life, property damage, and environmental degradation. One of the key contributing factors is the steepness of the slope. In October 2021, the slope near the Cisumdawu Toll Tunnel experienced several landslides, particularly around the tunnel outlet. This study aims to determine the safety factor values, evaluate the effectiveness of slope angles, and assess reinforcement using geosynthetics (Geomats) at varying slopes of 30°, 38°, and 63°. Slope stability was analyzed using the Bishop method, which provides results close to actual conditions. The analysis was also modeled and verified using GeoStudio Slope/W Student Version software. The safety factor obtained from the manual Bishop method was 2.07, while the GeoStudio analysis yielded 2.064. The slope stability analysis with varying slope angles resulted in different safety factor values: 2.3 at 30°, 1.96 at 38°, and 1.491 at 63°. After applying reinforcement using four layers of Geomat and wire mesh Geomat at the same slope angles, the safety factors improved, with better performance shown by the wire mesh Geomat. At a slope of 1:0.5 (63°), the safety factor was 1.494 with four-layer Geomat and 1.508 with wire mesh Geomat; at 1:1.5 (34°), the values were 2.068 and 2.075 respectively; and at 1:1.7 (30°), they were 2.305 and 2.312. The gentler the slope surface, the more stable the safety factor. The application of Geomats can prevent erosion and facilitate plant vegetation growth, thereby enhancing slope stability.
Analisis Penggunaan Data Uji SPT Dalam Penentuan Daya Dukung Fondasi Iwan Haryanto; Dendi Yogaswara
Jurnal Konstruksi Vol 24 No 1 (2026): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.24-1.1896

Abstract

SPT (Standard Penetration Test) test data provides detailed information about soil resistance and the distribution of soil strength at a given depth. According to SNI 02-1726-2012, soil layers that have SPT test values above 50 are hard soil layers. From the results of the literature study of soil investigation data in the field of the UPF (Functional Service Unit) Garut building construction at point BH-1, it was found that the soil layer with a hard consistency with an N-SPT value of 60 from the drilling surface to a depth between 0-4 m, then at a depth of 4 m with a category including hard soil, so in that case it can use the choice of shallow foundation type or deep foundation. Based on the calculation of the UPF Garut building structure with the help of SAP 2000, the maximum axial load acting is 5651.08 kN, the calculation of the bearing capacity of the deep foundation (bore pile) using the Reese and Wright method results in an allowable bearing capacity of 7199.02 kN with a maximum soil pressure of 6741.81 kN. Meanwhile, the calculation of the capacity of the shallow foundation (foot plate) using the Terzaghi and Peck method resulted in an allowable bearing capacity of 6599.8 kN with a maximum ground pressure of 1015.7 kN/m², although the capacity of the bore pile foundation is higher, the shallow foundation has an advantage in terms of cost efficiency and implementation time, given the strong soil characteristics at a depth of 4 meters.
Pengaruh Stabilisasi Tanah Lempung dengan Limbah Kaca dan Gipsum terhadap Peningkatan CBR Muhammad Ikhsan Nurfikri; Dendi Yogaswara
Jurnal Konstruksi Vol 24 No 1 (2026): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.24-1.1982

Abstract

Soil is a fundamental element in construction that functions as a structural support and therefore requires adequate characteristics and bearing capacity. Clay soil is known to have low bearing capacity and cohesive properties, so it often requires improvement. This study aims to determine the effect of mixing glass waste powder and gypsum on the California Bearing Ratio (CBR) value of clay soil from Bumi Cempaka Indah, Lebaksari Village, Karangpawitan District, Garut Regency, West Java. This location was selected because it is included in the planned construction of the Gedebage–Tasikmalaya–Cilacap (Getaci) Toll Road, making an assessment of soil bearing capacity necessary as part of infrastructure preparation. The research method uses an experimental approach through testing of physical properties, compaction, and unsoaked CBR on the original soil and soil mixed with glass powder (3%, 6%, and 9%) and a constant gypsum content of 8.5% by soil weight. The classification results show that the original soil belongs to group A-6 according to the AASHTO classification, indicating clay soil of fair to poor quality, and according to the USCS classification it belongs to group CL, or inorganic clay with low to medium plasticity, with an initial CBR value of 5.097%. A mixture of 3% glass powder + 8.5% gypsum increased the CBR to 7.188%. At a mixture of 6% glass powder + 8.5% gypsum, the CBR reached 12.319%, and at a mixture of 9% glass powder + 8.5% gypsum, the highest CBR value of 14.911% was recorded. This represents an increase of 192.54% compared to the original soil CBR value. The results indicate that the combination of glass waste powder and gypsum is effective in improving the bearing capacity of clay soil.
Sifat Kuat Lentur Beton Normal Dengan Pemanfaatan Abu Limbah Ampas Aren Sebagai Substitusi Parsial Semen Dendi Yogaswara; Ismi Purnama Sari; Abdullah Harits Muttaqien
Jurnal Konstruksi Vol 24 No 1 (2026): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.24-1.1984

Abstract

Pemanfaatan limbah industri sebagai bahan substitusi parsial semen pada beton merupakan upaya penting dalam pengelolaan limbah. Abu limbah ampas aren, yang dihasilkan dari industri tepung aren, berpotensi digunakan sebagai bahan substitusi semen karena memiliki kandungan silika (SiO2) sebesar 27,89 persen yang dapat berperan dalam pembentukan C-S-H pada beton. Penelitian ini menggunakan metode eksperimen untuk mengevaluasi pengaruh substitusi semen dengan abu limbah ampas aren terhadap kuat lentur beton mutu K-300 (24,9 MPa). Variasi substitusi adalah 0 persen, 3 persen, 5 persen, dan 7 persen, masing-masing menggunakan 3 benda uji balok berukuran 15×15×60 cm. Pengujian dilakukan setelah beton mengalami perawatan (curing) selama 14 hari, menggunakan mesin uji lentur dua titik. Hasil penelitian menunjukkan bahwa substitusi parsial semen dengan abu limbah ampas aren menurunkan kuat lentur beton. Kuat lentur beton normal sebesar 3,23 MPa, sedangkan pada variasi 3 persen 5 persen dan 7 persen berturut-turut sebesar 2,72 MPa, 2,41 MPa, dan 2,61 MPa. Meskipun substitusi 3 persen memberikan hasil terbaik di antara variasi lainnya, nilainya tetap lebih rendah dari beton normal. Dengan demikian, substitusi abu limbah ampas aren cenderung menurunkan kuat lentur beton normal.
Pengaruh Penambahan Abu Sabut Kelapa dan Semen Terhadap Nilai California Bearing Ratio dalam Stabilisasi Tanah Siswanti Siswanti; Dendi Yogaswara
Jurnal Konstruksi Vol 24 No 1 (2026): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.24-1.1988

Abstract

Indonesia merupakan negara dengan produsen kelapa terbesar di dunia, Food & Agriculutre Organization of United Nation (FAO) menyebutkan bahwa pada Tahun 2022 Indonesia mengekspor kelapa seberat 664,64 ribu ton. Saat ini industri pengolahan buah kelapa masih terfokus pada pengolahan hasil bagian buah dibanding dengan limbah yang dihasilkan. Dalam dunia teknik sipil, limbah sabut kelapa dapat dimanfaatkan sebagai bahan tambah untuk stabilisasi tanah dalam bentuk abu. Abu sabut kelapa memiliki susunan senyawa yang terdiri dari SiO2 42,98%, Al2O3 2,26%, dan Fe2O3 1,66%. Penelitian bertujuan untuk mengetahui nilai daya dukung tanah berdasarkan nilai California Bearing Ratio (CBR) dengan memanfaatkan campuran semen dan abu dari limbah sabut kelapa. Penelitian ini menggunakan metode eksperimental dengan pengujian Laboratorium di Laboratorium Teknik Sipil Institut Teknologi Garut. Pengujian terdiri dari pengujian sifat fisis tanah dan sifat mekanis tanah, pembuatan benda uji terdiri dari tanah asli dan tanah yang sudah diberi campuran bahan tambah. Nilai CBR didapat dari pengujian CBR tak terendam atau unsoaked. Persentase abu sabut kelapa yang digunakan yaitu 7%, 9%, dan 11%, serta semen PCC sebesar 5% secara konstan. Sampel tanah yang digunakan berasal dari Desa Karangsari, Kecamatan Leuwigoong. Hasil pengujian menunjukkan bahwa sampel tanah berdasarkan sistem kalsifikasi AASHTO merupakan kelompok A-2-7, sedangkan menurut USCS adalah jenis tanah SW-SM yang merupakan pasir bergradasi baik dengan lanau. Nilai CBR pada tanah asli diperoleh sebesar 6,15% mengalami kenaikan pada penambahan campuran 5% semen (konstan) dan 7%, 9%, 11% abu sabut kelapa dengan nilai 7,26%, 9,68%, dan 13,22%. Dari hasil pengujian tersebut, penambahan campuran semen dan abu sabut kelapa dapat meningkatkan daya dukung tanah dengan kenaikan nilai CBR.
Analisis Kestabilan Lereng Pertambangan Batu Andesit : Studi Kasus: Kecamatan Cigudeg Kabupaten Bogor Aini Agistina; Dendi Yogaswara
Jurnal Konstruksi Vol 24 No 1 (2026): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.24-1.1989

Abstract

Penelitian ini bertujuan untuk menganalisis dan mengevaluasi stabilitas lereng statis dan dinamis pada area pertambangan batu andesit PT Batu Multindo Perkasa di Desa Batujajar, Kecamatan Cigudeg, Kabupaten Bogor, Jawa Barat, yang berdekatan dengan lahan warga, mengingat potensi risiko keruntuhan lereng akibat aktivitas pertambangan. Analisis kestabilan lereng dilakukan menggunakan perangkat lunak Rocscience Slide 6.0 dengan metode Bishop Simplified untuk menghitung nilai faktor keamanan (SF) dalam berbagai kondisi. Hasil analisis menunjukkan bahwa pada kondisi statis, faktor keamanan lereng adalah 1.525 (kondisi asli), 1.526 (kondisi kering), dan 1.339 (kondisi jenuh). Analisis lereng dinamis dengan memperhitungkan pengaruh beban ledakan sebesar 93.684 kPa menghasilkan faktor keamanan sebesar 1.512 (kondisi asli), 1.513 (kondisi kering), dan 1.333 (kondisi jenuh). Berdasarkan hasil tersebut, lereng saat ini berada dalam kondisi stabil. Namun, mengingat potensi penurunan faktor keamanan pada kondisi jenuh dan pengaruh aktivitas peledakan, penelitian ini merekomendasikan dilakukannya monitoring kondisi air tanah secara berkala dan evaluasi desain peledakan yang lebih cermat untuk memastikan kestabilan lereng jangka panjang dan keamanan lahan warga di sekitar area pertambangan.
Pengaruh Penambahan Serat Kawat Steel Wool Terhadap Kuat Tarik Beton Mohammad Yogi Mulyadi; Dendi Yogaswara
Jurnal Konstruksi Vol 24 No 1 (2026): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.24-1.2147

Abstract

Concrete is a construction material that has high compressive strength but relatively low tensile strength, so certain materials need to be added to increase its tensile strength. One method that has been widely developed in concrete technology is the use of fibers as additives. This study aims to determine the effect of adding steel wool fiber pieces on the splitting tensile strength of concrete at variations of 0%, 1%, 2%, and 3% of the total mixture weight. The concrete used had a planned strength of f'c 20 MPa with a test age of 28 days. The test specimens were cylinders with a diameter of 15 cm and a height of 30 cm, while the research method used was an experiment with a research duration of two months. The test results showed that normal concrete (0%) had a splitting tensile strength of 2.72 MPa. The addition of 1%, 2%, and 3% steel wool resulted in splitting tensile strengths of 1.87 MPa, 1.75 MPa, and 1.30 MPa, respectively. Overall, the results showed that the addition of steel wool fibers in the variations used tended to decrease the splitting tensile strength of the concrete.
Evaluasi Kapasitas Hidraulik Saluran Irigasi Menggunakan Metode Manning Siti Ulpah Nurazizah; Sulwan Permana; Dendi Yogaswara
Jurnal Konstruksi Vol 24 No 1 (2026): Jurnal Konstruksi
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/konstruksi/v.24-1.3057

Abstract

Garut Regency is one of the regions in West Java Province with significant potential in the agricultural sector. One of the key infrastructures supporting these activities is the Cimaragas Irrigation Canal, located in Karangpawitan District. In recent years, this area has frequently experienced flooding due to overtopping of the irrigation canal, which is no longer capable of conveying the flow discharge, particularly during the rainy season. In addition, siltation and the accumulation of sediment and solid waste have further exacerbated the reduction in channel capacity. This study aims to assess water demand and water availability within the Cimaragas irrigation system, as well as to determine the ideal dimensions of the irrigation canal capable of conveying the planned discharge. The research employs a quantitative and descriptive approach, with hydrological and hydraulic analyses using the Manning equation and a trial-and-error method to determine the optimal cross-sectional dimensions. The analysis results indicate that the highest water demand occurs in April, amounting to 413.90 L/s, while the highest water availability also occurs in the same month at 639 L/s, indicating that the study area generally experiences a water surplus. Based on the capacity analysis of a trapezoidal channel section, the optimal dimensions obtained are a bottom width (b) of 5 m, a flow depth (y) of 1.8 m, a side slope (x) of 1.5, and a channel bed slope (S) of 0.005, resulting in an actual discharge of 254.285 L/s, which closely matches the irrigation discharge requirement of 245 L/s. From these results, it can be concluded that the existing irrigation canal is no longer adequate to convey the actual discharge, and therefore improvements and dimensional modifications are required by the Government of Garut Regency. This study provides technical recommendations for increasing the capacity and efficiency of the irrigation network to support the sustainability of the agricultural sector. The findings may serve as a basis for planning canal rehabilitation by local authorities to minimize flood risk and optimize irrigation water distribution.
Edukasi Pengelolaan Sampah Anorganik Terhadap Pengetahuan Dan Sikap Masyarakat Desa Sirnajaya Pamella M Sri Rezeki; Athaya Zhafirah; Rachminawati; Eko Walujodjati; Anjas Ninda Hantari; Ida Farida; Rina Kurniawati; Sulwan Permana; Dendi Yogaswara; Nanang; Adi Susetyaningsih; Ismi Purnamasari; Reski Ramadhani; Yeni Pariyatin; Alan Wijaya; Ratu Mafas Sukmalaras; Subhan Mulyana; Agus Ismail; Cepi Wendiki Alamsyah; Ganjar Jojon Johari; Greece Maria Lawalata; Madi Hermadi; Rudy Febrijanto; Fitri Nuraeni; R Dini Destiani Siti Fatimah; Risma Liyana Ulfa; Sri Rahayu
Jurnal PkM MIFTEK Vol 7 No 1 (2026): Jurnal PkM Miftek
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/miftek/v.7-1.3416

Abstract

Inorganic waste management remains a significant environmental challenge in rural areas. This Community Service Program (PkM) aimed to evaluate the effectiveness of an educational intervention on inorganic waste management in improving the knowledge and attitudes of residents in Sirnajaya Village, Garut. The program was conducted on February 4, 2026, in collaboration with the Garut Zero Waste community using a pre-test and post-test design involving 18 participants, consisting of housewives, university lecturers, and community members. The assessment instrument covered five indicators: understanding the definition of inorganic waste, identifying examples of inorganic waste, recognizing the environmental impacts of improper waste disposal, attitudes toward waste segregation, and intentions to reduce the use of single-use plastics. The results showed that 83.3% of the participants already possessed a high level of baseline knowledge. Consequently, the improvement in post-education scores was relatively limited, with an average normalized gain (N-Gain) of 0.11. This finding reflects a common ceiling effect, rather than indicating the ineffectiveness of the educational program. Nevertheless, three out of eighteen participants with lower initial knowledge demonstrated substantial improvements, achieving moderate to high levels of learning gain. Overall, the program contributed primarily to strengthening participants' knowledge and behavioral intentions regarding inorganic waste management. However, measurable changes in actual household waste management practices require further medium-term observation and follow-up evaluation.
Co-Authors Abdullah Harits Muttaqien Adi Susetyaningsih Aditia Saparingga Agus Ismail Aini Agistina Aini Fauzyah Putu Sanusi Alan Wijaya Anjas Ninda Hantari Ayi Dahlan Ayu Sri Rahayu Bima Guna Bhakti Cepi Wendiki Alamsyah Dini Destiani Siti Fatimah Eko Walujodjati Encep Ahmad Husni Mubarok Fitri Nuraeni Ganjar Jojon Johari Greece Maria Lawalata Ida Farida Ismi Purnama Sari Ismi Purnamasari Iwan Haryanto Latif Gunawan Madi Hermadi Mochammad Suva Nugraha Mohammad Yogi Mulyadi Muhammad Ikhsan Nurfikri Nanang Niki Faturrahman Nurholisah Pamella M Sri Rezeki R Dini Destiani Siti Fatimah Rachminawati Ratu Mafas Sukmalaras Reski Ramadhani Rina Kurniawati Risa Kristalia Nurlaela Risma Liyana Ulfa Rizal Rizaldi Rudy Febrijanto Siswanti Siswanti Siti Ulpah Nurazizah Sri Rahayu Subhan Mulyana Sulwan Permana Yeni Pariyatin Yuga Pinanggih Zulfiqor Abdul Aziz