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Journal : Enrichment: Journal of Multidisciplinary Research and Development

Comparative Analysis of Prestressed Girder Beam Method and Box Culvert on Terms of Construction Costs for Kedungpeluk Bridge Design Lutfi, Muchamad; Tjendani, Hanie Teki; Wulandari, Esti
Enrichment: Journal of Multidisciplinary Research and Development Vol. 3 No. 1 (2025): Enrichment: Journal of Multidisciplinary Research and Development
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/enrichment.v3i1.336

Abstract

The Kedungpeluk Bridge in Sidoarjo Regency collapsed in 2024 due to structural damage, prompting a need for efficient reconstruction methods. This study compared the cost efficiency and implementation time of two bridge designs—pre-stressed concrete beams and Box Culvert. The research used a quantitative approach to collect secondary data from project drawings, cost budget plans (RAB), and S-curves, alongside unstructured interviews with stakeholders. Findings revealed that the Box Culvert design was more cost-effective, requiring Rp. 1,440,254,544.83, compared to Rp. 1,912,436,195.15 for the pre-stressed concrete beams, resulting in a 24.69% cost savings. Moreover, construction with the Box Culvert design was completed in 10 weeks, 28.57% faster than the 14 weeks for the alternative design. These results highlight the Box Culvert as a superior choice for similar infrastructure projects, addressing urgent community needs for reliable transportation. The implications of this research extend to civil engineering practitioners and government agencies, providing a practical reference for future bridge designs that prioritize cost efficiency and timely implementation, thereby promoting enhanced connectivity and economic growth in the region. Further research is recommended to explore environmentally friendly designs and assess long-term performance in various contexts.
Cost Analysis of Wholesale Wage System and Work Efficiency in The Central Park Juanda Housing Construction Project - PT. Griyo Mapan Santoso Supriyanto, Yunaidi; Tjendani, Hanie Teki; Wulandari, Esti
Enrichment: Journal of Multidisciplinary Research and Development Vol. 3 No. 2 (2025): Enrichment: Journal of Multidisciplinary Research and Development
Publisher : International Journal Labs

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

Abstract

The cost analysis between the wholesale wage system and work efficiency has special significance in housing projects, such as in Central Park Juanda Housing by PT. The Scarlet Witch is a saint. Through a quantitative approach, this study also contributes to the construction management literature related to workforce management in the field. This study used a sample of 45 respondents consisting of construction workers in the Central Park Juanda housing project, including foremen, handymen, and other field workers. Respondent profiles included gender distribution (82% male), age (dominant 31-41 years), education (47% high school/vocational school), competency certification (58% have certificates), and work experience (dominant 11-15 years). The questionnaire data was tested for validity using the Pearson method with a significance level of 5% and all items were declared valid (rh ? 0.3). Reliability was tested with Cronbach's alpha, and all variables (X1 to Y) were declared reliable (? ? 0.6). The results showed that all independent variables (X1: Labor, X2: Wages, X3: Materials, and X4: Projects) had a negative influence on project efficiency (Y). However, only the variable X4 (Project State) had a significant effect with a significance value of 0.002 (< 0.05), while the other variables (X1, X2, and X3) were insignificant., then the data shown by the probability of significance of the ANOVA analysis was with a significance value of 0.021 < 0.05 thus Ho was rejected and Ha was accepted, meaning that simultaneously there was a significant influence. This shows that the state of the project plays an important role in influencing work efficiency, while labor, wholesale wages, and materials do not have a significant impact in the context of this study.