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Wahyudi, Herman
Civil Engineering Department, Institut Teknologi Sepuluh Nopember, Surabaya, Indonesia
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Energy Engineering Environmental Science Library & Information Science Mathematics Transportation

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Effectiveness And Stability Analysis Of Embankment Using Lightweight Embankment On Pasuruan - Probolinggo Toll Road Project Section 4, Indonesia Ritwandanu, Ruri Febri; Wahyudi, Herman; Lastiasih, Yudhi; Mufijar, Hamim
Journal of Infrastructure & Facility Asset Management Vol 6 (2024): Special Issue 3 : Journal of Infrastructure & Facility Asset Management
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/jifam.v6i0.19965

Abstract

The Pasuruan-Probolinggo Section 4 Toll Road project which has a length of 12.04 km is dominated by silty clay - clay. In addition to soft soil, there are other problems in the construction of the Pasuruan - Probolinggo Section 4 toll road, namely the limited availability of embankment soil material around the project site and the location of the quarry which is quite far away. In addition, when relying on embankment material from the quarry, the weather factor will play a very important role when the weather is rainy then the activity in the quarry stops, the targeted embankment volume is not met and the progress of work on that day is not achieved. Therefore, there is a need for alternative reinforcement of embankments other than soil embankments from quarries that are safe and light enough. Based on the existing problems, this research will conduct a comparative study of toll road embankment design with 3 different types of materials, namely: Conventional soil embankment compared with lightweight embankment in the form of EPS-Geofoam material and foam mortar material.  This research will use Plaxis 2D program. The results of this research will determine alternative embankment materials that can be applied to soft subgrade so that overall stability and hydrostatic uplift  requirements can be met. This research is expected to be a reference in planning the construction and improvement of the subgrade of the Pasuruan-Probolinggo Section 4 toll road and other toll roads using EPS geofoam embankment and foam mortar
A Study of Pile Displacement in Soft Soil: The Case of Semarang - Demak Toll Road Construction Package 1B Sagita, Novera; Wahyudi, Herman; Lastiasih, Yudhi
Journal of Infrastructure & Facility Asset Management Vol 7, No 1 (2025): Journal of Infrastructure & Facility Asset Management
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/jifam.v7i1.22417

Abstract

     In the construction package of Semarang-Demak Toll Road 1B, an elevated bridge is planned to be built using a pile foundation of 56 pieces with a diameter of 1.0 m installed at a depth of 68m. The soil conditions at the site are very soft to medium clay and silt. During the excavation of the footing work, there was a displacement of 11 piles. This study aims to analyze the pile displacement behavior at each work sequence due to the influence of excess pore pressure and excavator distance near the pile. The pile displacement behavior was modeled using a Finite Element Method (FEM) based program, Plaxis 2D. Piles are modeled using an elastic constitution model to obtain deformation results that match the actual conditions in the field. While the soil is modeled using the Mohr Coulomb soil constitutive model on the embankment soil and Soft Soil on the original soil. The analysis was conducted to determine the lateral displacement of poles in field conditions at each sequence of work on unconsolidated soil with/without an excavator load of 15 kN. The results showed that by conditioning the soil at 90% consolidation degree (U90%) can reduce the lateral displacement value of the pile by 95.96% at the 4 m deep excavation stage compared to the unconsolidated soil. By placing the excavator 6.5 m away from the piles, it can reduce the lateral displacement that occurs by 20.96% compared to the existing position of 3.5 m from the piles.
Parametric Study of Embankment Stability And Geotextile Reinforcement On Soft Soil Alam, Mirza Syah; Wahyudi, Herman; Lastiasih, Yudhi; Kurniawan, Yusrizal
Journal of Infrastructure & Facility Asset Management Vol 7, No 1 (2025): Journal of Infrastructure & Facility Asset Management
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/jifam.v7i1.22414

Abstract

The Semarang - Demak Toll Road Construction Project Section 1B has a length of 6.736 km, starting from STA. 1+578 to 8+314. There is a zone that has the highest embankment, namely zone N at STA. 4+200 to 4+600. However, based on soil investigation data, it is known that the Semarang - Demak Toll Road Construction Project Section 1B has a very thick compressible layer, which reaches a depth of 50 m. This makes the Semarang - Demak Toll Road Construction Project Section 1B face various challenges of construction on soft soil.The purpose of this research is to determine the Safety Factor (SF) value and the appropriate configuration of geotextile reinforcement requirements in an embankment with variations in compressible layer thickness, embankment height and embankment slope, especially in the case study of zone N with STA. 4+200 - 4+600. This research will be processed using the Limit Equilibrium Method (LEM) with the GEO5 auxiliary program.Based on the results in this study, it is known that the variation of compressible layer thickness does not have a significant influence on the calculation of the Safety Factor and geotextile reinforcement configuration. However, the variation of embankment height leads to the conclusion that the higher the embankment, the lower the Safety Factor. The variation of embankment slope also concluded that the steeper the embankment, the lower the Safety Factor. In addition, it is also known that the higher the embankment, the higher the number of geotextile reinforcement requirements and the steeper the embankment, the higher the number of geotextile reinforcement requirements. After making a nomogram of the relationship between these variations and implementing it on the case study, it is known that the embankment in Zone N of the Semarang - Demak Toll Road Construction Project Section 1B has a Safety Factor value of 0.42 and requires 33 layers of geotextile reinforcement with a tensile strength of 200 kN/m, a spacing of 25 cm between layers, and a Reduction Factor value of 1.65.
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 Barimbing, Fanny Rumintha Br; Lastiasih, Yudhi; Wahyudi, Herman; Udukha, Sifa`
Journal of Infrastructure & Facility Asset Management Vol 7 (2025): Special Issue 3 : Journal of Infrastructure & Facility Asset Management
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/jifam.v7i0.22485

Abstract

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.
Co-Authors Alam, Mirza Syah Barimbing, Fanny Rumintha Br Kurniawan, Yusrizal Lastiasih, Yudhi Mufijar, Hamim Ritwandanu, Ruri Febri Sagita, Novera Udukha, Sifa`