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Parametric Study of Embankment Stability And Geotextile Reinforcement On Soft Soil Mirza Syah Alam, Herman Wahyudi, Yudhi Lastiasih, Yusrizal KurniawanAnalysis Of Slope Stability Based On The Effect Of RainFall On The Lombok International Airport (Bil) – Mandalika Road STA 10+375 to STA 10+550 Made Sudiadnya, Mohamad Khoiri, Dwa Desa Warnana, Herlambang ZulfikarAnalysis of The Effect of Seismic Load on The Design Safety Factor of Foam Mortar with Bored Pile Landslide Location of Batas Pidie/Aceh Besar – Bts. Kota Sigli STA 0+560 Ichvan Danny Kurniawan, Trihanyndio Rendy Satrya, Ria Asih Aryani Soemitro, Fikri AfzalA Study of Pile Displacement in Soft Soil: The Case of Semarang - Demak Toll Road Construction Package 1B Novera Sagita, Herman Wahyudi, Yudhi Lastiasih &Yusrizal KurniawanDesign Of Toll Road Embankment With Secondary Compression Mitigation After PVD Installation And Solutions For The Probolinggo – Banyuwangi Toll Road Construction Project PackKAGE 2 STA 16+300 – STA 16+700 Septya Kukuh Aryandi, Indrasurya B. Mochtar, Noor Endah, Abdjad Agung Artant

NUMERICAL ANALYSIS OF SHEAR CAPACITY OF DOUBLE CORRUGATED WEB GIRDER INFILLED

This research investigates the shear capacity of double corrugated web steel I- girders filled with concrete using finite element analysis. The study examines the influence of the corrugation angle and the thickness of the concrete filling on the strength capacity of the girder beams. Four beams were designed to fail in shear along a 1500 mm span from the left support of the beam, enabling the determination of shear failure conditions. Each beam had identical properties with a flange width (B) of 250 mm, a web height (H) of 1000 mm, a span length of 3500 mm, a flange thickness (tf) of 15 mm, and a web thickness (tw) of 1 mm. The research employed a 3-point bending method, applying a single load point 1500 mm from the left support. The tests were conducted by varying the corrugation angles and the thickness of the concrete filling in the corrugated web, which served as the research variables. The study aimed to determine the peak load-deflection curve, the failure mode diagram, and the shear capacity of the girder beams. The results of the tests showed that the double corrugated web steel I-girder filled with concrete, with a corrugation angle of 45 degrees and a concrete thickness of 65 mm, exhibited the best load-bearing strength among the three variations tested. It demonstrated a 52.65% increase in load capacity and a 53.49% reduction in deflection compared to the finite element validation test values. In contrast, the other three variations showed a decrease in shear strength

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Handling Selection of Compression And Stability Problems of Embankment Based on The Thickness of Soft Soil Layer Below (Case Study: Rengat – Pekanbaru Toll Road Project Sta. 176+775 – Sta. 176+975) Pandu Hermawan, Noor Endah Mochtar, Indrasurya B. Mochtar, & Mahar MuliawanSlope Stability Analysis Under Dry-Wetting Cycle Conditions (Case Study: Landslide Countermeasure of Batas Pidie/Aceh Besar - Batas Kota Sigli)Zulfadhli, Trihanyndio Rendy Satrya, Ria Asih Aryani Soemitro & Fikri AfzalAlternative Planning Slope Stabilization On Roadway Case Study : Landslide On Tabone-Polewali Road Section KM 168+790 to 168+820 Ismi Istiqamah, Mohamad Khoiri, Mahendra Andiek Maulana & Bambang S. RazakStudy of The Behavior of Abutment Piled Foundation due to Nearby Staged-Embankment (Case Study: Kali Kandang Bridge on The North Ring Road of Lamongan) Azkiya Nabila, Trihanyndyo Rendy Satrya, Ria Asih Aryani Soemitro, Sifa UdukhaBehaviour Study of Abutment Pile Foundation on Lightweight Embankment Oprit(Case Study: Kali Otek Bridge – Lamongan North Ring Road Construction Package Section 2)Nila Wahyu Pertiwi, Ria Asih Aryani Soemitro, Trihanyndio Rendy Satrya, Sifa' Udukh

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Analysis of Temporary Preloading for Bridge Approach Embankment to Eliminate Secondary CompressionCase Study: Probolinggo – Banyuwangi Toll Road Construction Project Section 3 STA 40+550 Muhammad Rizal Permadi, Indrasurya B. Mochtar, Noor Endah Mochtar & Reza KazhimiThe Effect of Prefabricated Vertical Drain Length on Soft Soil Settlement (Case Study: The North Ring Road of Lamongan STA. 3+200)Henniko Okadha, Herman Wahyudi, Yudhi Lastiasih & Sifa' UdukhaAnalysis of Excavated Soil Utilization as Embankment Material and Foundation Layer on Singaraja – Mengwitani Road Section (BALI) Dinul Hadi, Ria Asih Aryani Soemitro, Trihanyndio Rendy Satrya & Noor FachrieAnalysis of PVD Installation Methods Due to Limited Vertical Clearance in the Lamongan North Ring Road Construction Project Section 1 STA 0+400 to STA 0+426 Fanny Rumintha Br Barimbing, Yudhi Lastiasih, Herman Wahyudi & Sifa` UdukhaDetermination of Building Assets and Equipment Requirements Based on Sustainable Warehouse Cencepts for PT Kansai Prakarsa Coatings Putri Dewi Purnama & Halla Nur Aziza

Analysis of PVD Installation Methods Due to Limited Vertical Clearance in the Lamongan North Ring Road Construction Project Section 1 STA 0+400 to STA 0+426

The construction of the Lamongan North Ring Road is planned to be built on soft soil. Based on the results of the soil investigation, it is known that the subgrade condition is classified as soft to very soft soil with a depth of 18 meters. One of the problems of this very soft soil is the settlement. Therefore, the National Road Implementation Agency of East Java - Bali Region conducted subgrade improvement using preloading combined with Prefabricated Vertical Drain (PVD). The configuration of the PVD installation is 18 meters deep with a triangular pattern and the distance between PVDs is 1 meter. To stake the PVDs 18 meters deep, a piling rig with a minimum height of 24 meters is required. In the STA 0+400 to STA 0+426 section there is a 150 kV Lamongan - Paciran High Voltage Air Line (SUTT) cable crossing the road with a conductor to platform distance of 18 meters. The existence of this cable is a challenge in the PVD driving as deep as 18 meters. Therefore, this journal will analyze the PVD piling implementation method that can be carried out in this segment. The method carried out in this study is to start with the collection of secondary data such as shop drawings as a reference for the implementation of work in accordance with the planned design. Based on the design plan, an implementation method that can be applied to limited vertical clearance conditions is obtained. Based on the results of the research, an 18-meter deep PVD installation method was obtained that can be applied to limited vertical clearance conditions in the Lamongan North Ring Road construction project Section 1 STA 0+400 to STA 0+426. In addition, it was also found that the time required was 34.75 minutes to stake 1 PVD point using the pulled hole PVD method

Sustainable Logistics Through Waterways: Balancing Cost, Efficiency, and Environmental Impact

The use of various modes of transportation in transporting goods and passengers certainly presents each advantage. However, transporting logistics by land has various negative impacts such as pollution, congestion, and excessive dependence on land transportation [19]. The use of land transportation modes also has an impact on the high cost per kilometer with the same distance traveled. The use of inland waterways as a mode of logistics transportation has increased in recent years especially in Europe and Asia, of course this is driven by the benefits offered. The main objective of this study is to analyze and compare the effectiveness of sustainable logistics using inland waterway modes, especially in the context of cost, operational efficiency, and environmental impact. This research aims to provide an in-depth insight into the potential benefits and challenges faced in implementing an inland waterway-based logistics system. The method used to find data and information is to use the literature study method that discusses the use of inland waterways. From the results of the studies collected and analyzed, it was found that Inland Waterway has many positive impacts and greater benefits when compared to using other transportation routes. In addition, the application of Inland Waterway has succeeded in reducing air pollution levels, reducing shipping costs, and as the most environmentally friendly branch of water transportation

Phenetic Diversity and Relationships of Sea Lettuce (Ulva spp.) on the Southern Coast of Gunungkidul Yogyakarta Indonesia

The development of tourism areas in the Gunungkidul coastal zone was a potential threat that can affect the marine macroalgae diversity. In order to prevent the decline of macroalgae diversity from these anthropological threats, a comprehensive study is needed to record the population dynamics that occur. The objective of this study is revealing the species diversity and phenetic relationship of the sea lettuce (Ulva spp.).  Phenetic analysis of sea lettuce was conducted by observing morphological, anatomical, and biochemical characters. Clustering analysis was done by the UPGMA method, whereas ordination analysis was conducted using the PCA (Principal Component Analysis) method; both of them were calculated using the MVSP 3.1 program. The result of the study discovered four species of Ulva, i.e., Ulva lactuca, Ulva rigida, Ulva compressa, and Ulva linza. The reconstruction of phenetic relationships revealed two main clusters of sea lettuce, exhibiting a percentage difference of 75.2. The PCA analysis exhibited eight characters that significantly influence clustering patterns, including thallus color, blade width, blade thickness, blade hole, stiff edge cells, cell surface diameter, elongated cell shape, and the presence of violaxanthin and neoxanthin

Application of the finite element method for evaluating the stress due to operating load in high energy piping system

The stress value of the piping system will change during operating conditions. The stress value affects the integrity of the piping system. Excessive stress will cause deformation and damage to the piping system. The operating condition parameters of the piping system are temperature and pressure. The High-Energy Piping (HEP) system is subjected to high pressures and temperatures, which can cause significant stresses on the piping components. So stress analysis needs to be carried out to ensure that the piping system has strength and flexibility. The Cold Reheat Pipe (CRP) steam line is one of the High-Energy Piping Systems in this steam power plant. CRP consists of CRP BS 130 and CRP BS 131. This paper is about evaluating the stress due to operating loads in 2024 (temperature, pressure, and remaining thickness) for steam lines on the high-energy piping system using the finite element method and refers to ASME B31.1. The output stress values in the piping system in this paper consist of stress due to sustained load, stress due to thermal load, and hoop stress. The CRP BS 130 modeling results show the maximum stress due to sustained load (166.6 kg/cm2), the maximum stress due to the thermal load (112.8 kg/cm2), and the maximum hoop stress (855.6 kg/cm2). The CRP BS 131 modeling results show the maximum stress due to sustained load (974.2 kg/cm2), the maximum stress due to the thermal load (123.5 kg/cm2), and the maximum hoop stress (938.9 kg/cm2). The results of the stress evaluation due to the operating load were still below the allowable stress and are still permitted by the ASME B31.1 Code.

Analisis Debit Puncak DAS Bengkenang Air Ndelengau Desa Ganjuh Kabupaten Bengkulu Selatan Menggunakan Pemodelan HEC-HMS Dengan Metode SCS Curve Number

Desa Ganjuh merupakan salah satu kawasan dari Daerah Aliran Sungai (DAS) Bengkenang Air Ndelengau Kabupaten Bengkulu Selatan Provinsi Bengkulu. Daerah ini berpotensi terjadi banjir saat curah hujan tinggi seperti yang dialami pada tahun 2022. Penelitian ini bertujuan untuk mengetahui besar dan waktu debit puncak yang tercermin melalui pemodelan hidrograf. Pemodelan hidrograf dilakukan berdasarkan metode SCS Curve Number dengan bantuan Program HEC-HMS (Hydrologic Engineering Centre-Hydrologic Modelling System). Data curah hujan yang digunakan adalah curah hujan dalam 15 tahun terakhir, mulai dari tahun 2009 sampai dengan tahun 2023. Hasil penelitian ini dapat diperoleh debit puncak dengan kala ulang  2 tahun, 5 tahun, 10 tahun, 25 tahun, dan 50 tahun, berturut-turut adalah sebesar  180,4 m3/s; 232,4 m3/s; 249,8 m3/s; 266,9 m3/s; dan 277,3 m3/s. Waktu puncak terjadi pada sore hari dengan waktu simulasi selama 24 jam, awal simulasi terjadinya hujan pada pukul 18.00 tanggal 01 Januari 2023 dan akhir simulasi terjadinya hujan pada pukul 18.00 tanggal 02 Januari 2023. Penelitian ini dapat digunakan sebagai pedoman dalam pengelolaan sumber daya air di DAS Bengkenang

Uji Karakteristik Tanah Kohesif Pada Kawasan Perumahan Dwifa Residence Kota Bengkulu dan Implementasinya untuk Perencanaan Pondasi Dangkal Berdasarkan Metode Elemen Hingga

Penelitian ini dilakukan untuk mengindentifikasi karakteristik tanah kohesif pada kawasan Perumahan Dwifa Residence Kota Bengkulu, dan pengaplikasiannya pada desain struktur pondasi dangkal tipe telapak. Pengujian diawali dengan uji sifat fisis, yaitu uji kadar air, berat volume, berat jenis, analisis ukuran butir, danatterberg limits, dari pengujian tersebut diklasifikasikan tanah pada lokasi ini merupakan tanah lanau elastis (MH). Pengujian sifat mekanis, meliputi uji kuat tekan bebas, dan konsolidasi. Pemodelan pondasi dilakukan dari data hasil uji sifat fisis dan mekanis tanah berbasis aplikasi berdasarkan metode elemen hingga di salah satu titik, dengan nilai kuat tekan bebas (qu) dan kuat geser (Su) terkecil dari ketiga titik lokasi penelitian, untuk kedalaman 0,5 m, 0,75 m, dan 1 m beserta variasi lebarnya, agar lebih konservatif. Nilai faktor aman terkecil diperoleh 1,856 dan terbesar 6,632, dengan nilai beban vertikal maksimum terbesar 173 kN/m2 untuk kedalaman 1 m dan lebar pondasi 2 m