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Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan
Published by Universitas Islam Lamongan
ISSN : 25032399     EISSN : 26207222     DOI : https://doi.org/10.30736/cvl
Core Subject :
Jurnal Penelitian Teknik Sipil UNISLA (ISSN2503-2399) adalah jurnal ilmiah yang bertujuan untuk mengkomunikasikan hasil dan riset teknologi dalam rangka untuk pengembangan teknologi di bidang teknik sipil. Sasaran pembaca adalah para ilmuwan, akademis, serta praktisi dari bidang teknik sipil sebagai berikut: Rekayasa Struktural, Teknik Geotek, Rekayasa Sumberdaya Hidrolik dan Air, Rekayasa Transportasi, dan Manajemen Konstruksi.
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Articles 9 Documents
 1 
Search results for , issue "Vol 10 No 2 (2025): SEPTEMBER" : 9 Documents clear
Effect of Variations in Water Addition On Maximum Dry Weight in Clay Soil Compaction Rina Dwi Fatika; Agata Iwan Candra; Mahardi Kamalika Khusna Ali
Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan Vol 10 No 2 (2025): SEPTEMBER
Publisher : Program Studi Teknik Sipil, Fakultas Teknik, Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/cvl.v10i2.1397

Abstract

Soil is a crucial element in construction, serving as the foundation for structural support. Soil compaction is one of the primary methods to enhance soil stability, especially for clay soil, which expands and shrinks due to changes in moisture content. This study aims to analyze the effect of water content variation on the maximum dry unit weight in clay soil compaction. The experimental testing was conducted in the Civil Engineering Laboratory of Kadiri University using the TS-365 Automatic Standard Proctor machine. The water content variations used were 15%, 18%, 20%, 23%, and 26%. The results showed that the optimum moisture content for achieving the maximum dry unit weight was 23%, with a maximum dry unit weight of 1,743 g/cm³. Increasing water content up to the optimum point increases soil density, but excess water reduces the dry unit weight due to particle separation. This research contributes to optimizes clay soil compaction for more stable and sustainable construction. By determining the optimum moisture content, the compaction process can be conducted more efficiently, minimizing the risk of soil volume changes and improving soil-bearing capacity for long-term infrastructure development.
Optimization of High Early-Strength Concrete Mix Design for Structural Applications in the BJ. Habibie Stadium Construction Project Firman, Risman; Joey Limbongan; Yanny Febry Fitriani Sofyan; Munadrah; Syahrul Satar; Ahmad Tamsil Yunus; Andi Widiasari Maruddani
Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan Vol 10 No 2 (2025): SEPTEMBER
Publisher : Program Studi Teknik Sipil, Fakultas Teknik, Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/cvl.v10i2.1424

Abstract

This study investigates the application of high early-strength concrete (HESC) to accelerate the construction of the west tribune at BJ. Habibie Stadium, which underwent total demolition during a critical project phase. The research employed an experimental method to evaluate the feasibility of materials and optimize the mix design, beginning with small-scale trial mixes at the batching plant and validating the effectiveness of predefined quality control procedures. Aggregate testing was performed on coarse and fine aggregates, including analysis of colloid content, fineness modulus, water absorption, moisture content, and specific gravity. Mix design aimed to achieve a target strength of 30 MPa within 7-day using a water-cement ratio of 0.33 and chemical admixtures (retarder and superplasticizer). Concrete samples were tested for compressive strength at 3 and 7 days. Results showed the 7-day average compressive strength reached 35.19 MPa, confirming the effectiveness of the HESC mix for fast-track construction. Early strength gain was supported by good aggregate gradation and chemical admixture synergy, allowing earlier formwork removal and structural progression. This study concludes that the adoption of optimized HESC provides a viable solution for time-constrained infrastructure projects.
Application Of Crashing Method On Sutt Construction Project 150 Kv Kolaka - Pomalaa Switching - PT Antam Pomalaa Customer Rachim, Fatmawaty; Frans Ryanto Hasudungan Tampubolon; Herwina Rahayu Putri; Andi Butsainah Tumaadir
Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan Vol 10 No 2 (2025): SEPTEMBER
Publisher : Program Studi Teknik Sipil, Fakultas Teknik, Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/cvl.v10i2.1443

Abstract

Construction projects often experience delays that can result in a fine of 1/1000 of the contract value according to Presidential Regulation No. 54/2010. To overcome this, the crashing program method can be applied to accelerate the project duration by identifying and compressing the critical path. The case study on the 150 kV Kolaka - Pomalaa Switching - PT Antam Pomalaa SUTT Construction Project which experienced delays, analyzed the need for additional time, equipment and labor. With an initial contract duration of 300 calendar days, the implementation of the crashing program focused on four priority segments of work (TIP 40-54, TIP 01-11, TIP 23-40, and TIP 11-23). The results of the analysis showed that the application of the crashing program method successfully optimized the project completion duration to 263 days, allowing the project to return to the contract schedule and avoid potential fines.
Experimental and Confining Pressure Analysis of Steel Clamp Confined Unreinforced Concrete Subjected to Axial Concentric Load Yansiku, Sandy I.; Chandra, Jimmy
Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan Vol 10 No 2 (2025): SEPTEMBER
Publisher : Program Studi Teknik Sipil, Fakultas Teknik, Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/cvl.v10i2.1453

Abstract

Vertical cracks and spalling of the concrete cover in reinforced concrete structures are examples of failure modes of concrete columns due to repeated earthquake loads. Strengthening methods have been introduced including external jacketing using costly carbon FRP. This study investigated external strengthening of cylindrical concrete using low-cost thin steel confining sheets subjected to concentric axial loads. The experimental works in this study tested the tensile strength of the confining steel elements, the compressive strength of unconfined and confined cylindrical concrete. The composition of the steel confining elements is positioned in such that it could generate an optimal confinement effect and prevent local buckling. This study also developed the formulation of the confining stress and ultimate axial load based on the test results of the current study and past research data. The results showed that the use of steel clamp elements improves the axial strength and axial deformation of cylindrical concrete columns by over 200% without buckling of the clamp elements. The external confinement method can reduce vertical cracks and strain localization that usually occur in conventional cylindrical concrete. The proposed formulation of the confining stress and the ultimate axial load provided accurate results compared to the experimental results.
Stabilization of Coastal Embankments with Geotextile and Gabion Structures: Insights from a Tidal Zone Road Project Dian Kharisma Dewi; Ferly Oktavia
Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan Vol 10 No 2 (2025): SEPTEMBER
Publisher : Program Studi Teknik Sipil, Fakultas Teknik, Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/cvl.v10i2.1457

Abstract

This study presents a technical overview of a coastal road embankment constructed in a tidal zone of a small island in Indonesia. The objective is to document the integrated application of non-woven geotextile and multi-level gabions as a stabilization system on moderately strong subgrade soils affected by tidal dynamics. The research method involved descriptive analysis based on as-built documentation and field data, including California Bearing Ratio (CBR) tests at three locations. The results showed CBR values ranging from 41.11% to 60.84%, which classify the subgrade as moderately strong. Despite this, the use of geotextile was essential to prevent mixing of soft subgrade and fill material, provide load distribution, and ensure drainage, while the gabion structures acted as lateral confinement and toe protection against erosion caused by tidal infiltration. The findings suggest that soil strength alone is insufficient for coastal infrastructure design, and integrated stabilization measures should account for environmental forces such as saturation cycles and hydraulic pressure. This case offers a practical insight into adaptive geotechnical strategies for road construction in tidal zones, serving as a reference for similar projects in archipelagic and low-lying coastal regions.
Barriers to Sustainable Construction Implementation in Makassar: A Comparative Study of State-Owned and Private Contractors Ikhsan; Riska Ayu Melyanti Sabang
Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan Vol 10 No 2 (2025): SEPTEMBER
Publisher : Program Studi Teknik Sipil, Fakultas Teknik, Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/cvl.v10i2.1463

Abstract

Achieving sustainability in construction projects requires active involvement from all stakeholders in implementing environmentally responsible techniques and materials throughout the project lifecycle. This study aims to identify and analyze the barriers to sustainable construction implementation from the perspectives of both state-owned and private contractors. A purposive sampling technique was employed to determine the study participants. Using the Interpretive Structural Modeling (ISM) approach, this research reveals key hierarchical barriers within each contractor group. For state-owned contractors, the most prominent barriers include A1 (Lack of knowledge and standards), A5 (Project manager incompetence), and A6 (Limited access to sustainable materials and technology). In contrast, private contractors identified A1 (Lack of knowledge and standards), A2 (Poor design practices), and A4 (Lack of communication between project stakeholders) as the most critical barriers. These findings suggest that different strategies and policy interventions are needed to address context-specific barriers in order to accelerate the adoption of sustainable construction practices across sectors.
Optimal Drainage System Strategy On Gringging Highway, Kediri To Address Water Logging During The Rainy Season Wijaya, Anindita Fitria; Rahmawaty, Fitry; Siswanto, Eko
Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan Vol 10 No 2 (2025): SEPTEMBER
Publisher : Program Studi Teknik Sipil, Fakultas Teknik, Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/cvl.v10i2.1465

Abstract

Rapid land use change in the Jalan Raya Gringging area necessitates a thorough analysis of the drainage system capacity to forecast increased flooding, especially during the rainy season. A mix of descriptive and quantitative methods was employed, including field surveys to measure the physical size and condition of the drainage channels, and hydrological and hydraulic analyses to assess system performance. Hydrological analysis used rainfall data from the past ten years to estimate peak discharge via rational method calculations. The hydraulic analysis evaluated the channel's ability to efficiently convey floodwaters. The results showed that the existing drainage capacity was able to accommodate the flow discharge according to the design discharge with various return periods. However, inundation conditions that occur during the rainy season are caused by elevation differences between the channel and the road surface, so as an effort to increase the efficiency of the drainage system and reduce the risk of inundation, it's recommended that the application of infiltration wells as a complementary strategy that serves to reduce the volume of surface inundation and can strengthen the effectiveness of the existing drainage system. This research expected to contribute to the development of SuDS-based adaptive drainage system planning.
Benefit-Cost Analysis of Bioretention for Suburban Drainage Load Reduction Induced by Surface Runoff Putri, Fidyasari Kusuma; Robbani, Hilma Wasilah; Pranantya, Vanadani; Widiarti, Wiwik Yunarni; Wiyono, Retno Utami Agung
Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan Vol 10 No 2 (2025): SEPTEMBER
Publisher : Program Studi Teknik Sipil, Fakultas Teknik, Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/cvl.v10i2.1558

Abstract

Suburban areas with predominantly residential land use and low soil infiltration rates are highly vulnerable to surface runoff and local flooding. This study examines the effectiveness and economic performance of bioretention systems as a runoff management solution in the Wonojati and Jenggawah areas, Jember Regency. Hydrological simulations were conducted using SWMM 5.2 software for two intervention scenarios, namely the application of bioretention in 10% and 20% of the subcatchment areas. The effectiveness of the system was evaluated based on runoff volume reduction, while the economic aspect was assessed using the Benefit-Cost Ratio (BCR) approach. The simulation results showed that the system reduced runoff by 13.6% in Plan 1 and 17.4% in Plan 2. However, BCR values of 0.014 and 0.022, respectively, indicate that the annual financial benefits are not sufficient to cover the system’s annualized costs. These findings highlight the need for alternative approaches that are more economically efficient. The use of decentralized LID systems such as rain barrels is considered more adaptive for dense residential areas and is recommended as a complementary solution to enhance the resilience of drainage systems in flood-prone suburban regions.
Analysis Of Work Accident Risks in The Construction Of Sutet Steel Towers Using the JSA (Job Safety Analysis) Method Yasinta, Rezi Berliana; Fadhilah, Muhammad Rasyid; Buchori, Syakiila Az Zahra Al; Hasanah, Nadilla Hikmatul; Hermawan, Fajar
Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan Vol 10 No 2 (2025): SEPTEMBER
Publisher : Program Studi Teknik Sipil, Fakultas Teknik, Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/cvl.v10i2.1455

Abstract

Construction activities inherently carry risks that can lead to accidents, causing delays, injuries, and financial losses. In high-risk projects such as High Voltage Direct Current (HVDC) transmission tower construction, inadequate safety practices and low awareness of Occupational Health and Safety (OHS) increase the potential for workplace accidents. This qualitative descriptive study analyzes potential work hazards in HVDC tower construction using secondary data and the Job Safety Analysis (JSA) method. Four main work processes—tower leg, body, and cross arm installation, and cable pulling—were assessed. Results show that all activities involve significant risks, with falls from height, falling objects, and puncture/scratch injuries being the most common. There are 6 activities in the Extreme category, 3 activities in the High category, 14 activities in the Moderate category, and 8 activities in the Low category. The main risks are falling from heights, being struck by materials, and injuries caused by work tools, which are exacerbated by low use of PPE, weak supervision, and lack of worker compliance. The solution to this problem lies in control priority, where there are four solutions: elimination, engineering, administration, and personal protective equipment control.

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