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Kajian Penggerusan (Scouring) pada Dinding Saluran Air Waringin Jaya Kecamatan Bojonggede Kabupaten Bogor Chika Restu Maulidina, Chika; Hariati, Feril; Nandiasa, Jantiara Eka; Taqwa, Fadhila Muhammad Libasut
Tameh Vol. 13 No. 1 (2024): Tameh: Journal of Civil Engineering
Publisher : University of Muhammadiyah Aceh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37598/tameh.v13i1.149

Abstract

The Waringin Jaya river is a tributary of the Ciliwung river that passes through Waringin Jaya village. Although it is not classified as a river with a large discharge, it is capable of eroding riverbanks and retaining walls, endangering the community. This study aims to analyze the magnitude and depth of local scour that occurs on gabion-type retaining walls, located in the Waringin Jaya River basin, Kec. Bojonggede, Kab. Bogor using the Hec-Ras computer application. The calculation of the discharge plan for the return period of 2 years, 5 years, 10 years, 20 years, 25 years, 50 years, and 100 years using the rational method was carried out based on daily rainfall data at the Citeko Meterological Station and the West Java Climatology Station with a data length of 2007 - 2021. Based on the calculations that have been carried out, the water level on the retaining wall with a flood return period of 2 years, 5 years, 10 years, 20 years, 25 years, 50 years, and 100 years is 0.92 m; 0.99 m; 1.03 m; 1.04 m respectively; 1.06 m; 1.08 m; and 1.10 m, while based on the analysis conducted with Hec-Ras bridge scour, the scour that occurs at each return period flood discharge is 1.24 m; 1.32 m; 1.35 m; 1.39 m; 1.40 m; 1.44 m; and 1.46 m, respectively. 
Analysis of the Effect of Evaluation and Innovation in the Development of Construction Safety Culture on the Safety Leadership Model using SEM Approach Taqwa, Fadhila Muhammad Libasut; Priyambodo, Bambang; Subkhan, Subkhan; Naibaho, Pio Ranap Tua
Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil Vol. 9 No. 2 (2025)
Publisher : Universitas Ibn Khaldun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/komposit.v9i2.20134

Abstract

In the construction sector, the Construction Safety Management System (SMKK) has been determined by the Regulation of the Minister of Public Works No. 10 of 2021 as a reference for addressing the risk of industrial accidents and improving building safety. Full implementation of occupational safety (K3) can minimize the risk of work accidents. However, in reality, there are still many obstacles for companies and employees, and many accidents in the workplace are caused by unsafe behavior factors by the workers themselves. The methodology used in this study involves various approaches, such as literature review and primary data acquisition through questionnaires targeting respondents in construction project environments. The collected data will be analyzed using the Structural Equation Modeling method to identify important variables. Data processing was performed using the Smart-PLS version 4.1.0.1 application to determine the outer and inner models. Hypothesis testing was conducted using bootstrapping, considering the Original Sample values, T-statistics, and P-values. Based on the results, it is concluded that safety leadership has a significant indirect influence on improving safety performance. The strengthening of leadership aspects has the largest impact on improving safety culture, which then influences the improvement of construction safety performance, with an original sample (O) value of 0.273, a sample mean (M) of 0.277, a standard deviation (STDEV) of 0.177, a T-statistic value of 2.324, and a P-value of 0.001. Furthermore, effective safety evaluation (e.g., constructive and systematic evaluation) can help build a stronger safety culture, which in turn will improve overall safety performance. The implementation of innovation in construction processes or safety technology can also encourage better safety behavior among workers, which then contributes to improved safety performance.
Analisis Stabilitas Lereng Dengan Menggunakan Perkuatan Soldier Pile (Studi Kasus Ruas Jalan Di Papua Barat) Muktadir, Redho; Syaiful; Muhammad Libasut Taqwa, Fadhila
INTER TECH Vol 1 No 2 (2023): INTER TECH
Publisher : Fakultas Teknik Universitas Bhayangkara Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54732/i.v1i2.1065

Abstract

Provinsi Papua Barat merupakan hasil pemekaran dari Provinsi Papua pada tahun 2005. Kondisi alam papua barat yang terdiri dari pergunungan yang menyebabkan jalan jalan berada pada daerah rawan longsor. Oleh karena itu penulis merasa perlu untuk menganalisis stabilistas lereng yang berada disisi jalan.Dalam analisis ini yang dilakukan pertama adalah mengecek kondisis existing lereng stabil atau tidak, lalu dilakukan analisis balik untuk mendapatkan parameter kondisi desain. Parameter desain digunakan untuk menentukan perkuatan dari lereng.Perkuatan yang digunakan adalah solder pile yang digunakan untuk memotong bidang gelicir dari lereng. Berdasarkan analisis perkuatan menggunakan solder pile tanpa anda pengeruh muka air tanah sebesar faktor keamanan adalah 2.37 dan jika ada pengaruh dari muka air tanah faktor keamanan adalah 1.3, dari nilai faktor keamanan diatas menunjukan bahwa lereng stabil dengan perkuatan menggunakan solder pile.
Analisis Stabilitas Tanggul Sungai Tondano, Kab. Minahasa, Sulawesi Utara Ilham, Ilham; Muktadir, Redho; Taqwa, Fadhila Muhammad Libasut
Jurnal Komposit: Jurnal Ilmu-ilmu Teknik Sipil Vol. 10 No. 1 (2026)
Publisher : Universitas Ibn Khaldun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/komposit.v10i1.22878

Abstract

The Tondano River embankment serves a critical function in safeguarding residential areas and agricultural lands in Minahasa Regency against flood risks. However, according to data from the Regional Disaster Management Agency (2022), approximately 30% of the embankment segments have exhibited structural distress, including longitudinal cracking and subsidence, primarily triggered by internal seepage and toe erosion on the downstream slopes. This study evaluates the structural stability of the embankment at six critical cross-sections (P54, P78, CP7, P126, CP24, and P170) utilizing GEO5 2022 software, employing both the Spencer and Morgenstern-Price limit equilibrium methods. The analytical results indicate that under existing conditions, several sections failed to meet the minimum required safety factor (SF < 1.5), with critical values falling as low as 0.67 at CP7 and 0.76 at P126. While the implementation of Type III-n sheet piles with a 12-meter penetration depth was modeled at P54 and P126, the resulting deformations exceeded the structural capacity, necessitating the integration of gabion structures to provide additional passive resistance. This combined reinforcement strategy successfully increased the safety factor to 1.91 for P54 and 1.86 for P126. Based on these findings, the study proposes three distinct design classifications: Type 1 (integrated sheet pile and gabion system), Type 2 (stand-alone sheet pile), and Type 3 (unreinforced). Additionally, the installation of riprap protection is highly recommended across all downstream slopes to mitigate long-term erosive effects.