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All Journal Journal of Infrastructure and Facility Asset Management
Yudhi Lastiasih
Civil Engineering Departement, 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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Slope Stability for Landslide in Road Preservation Working Packages Ende-Wolowaru and Junction-Kelimutu STA 8+425 Frans Andre Sasarari; Yudhi Lastiasih; Herman Wahyudi; Agustinus Junianto
Journal of Infrastructure & Facility Asset Management Vol 6 (2024): Special Issue 2 : Journal of Infrastructure & Facility Asset Management
Publisher : Departemen Teknik Sipil, Institut Teknologi Sepuluh Nopember

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On the Ende-Kelimutu national road section at STA 8+425, according to the identification and field survey, the landslide that occurred at this point was caused by high rainfall intensity and geological factors of the slope. As the road supervisor, the Balai Pelaksanaan Jalan Nasional (BPJN) of East Nusa Tenggara has designed a landslide treatment using a combination of cantilever walls and drilled poles. Soil investigation data at STA 8+425 shows that the slope is dominated by sand with N-SPT values above 15 to a depth of 14.45 meters. When making design improvements, a number of rainfall data from several weather observation stations are needed, in order to determine the effect of rainwater infiltration on the landslides that occur. This study aims to determine the influence of rainwater infiltration on the occurrence of landslides at the study site, where the results of the analysis conducted with Geostudio prove the truth. Modeling with the combination of SEEP/W and SLOPE/W, the FS value before the landslide was 2.302 and then decreased to 0.35 during the landslide.
Effectiveness And Stability Analysis Of Embankment Using Lightweight Embankment On Pasuruan - Probolinggo Toll Road Project Section 4, Indonesia Ruri Febri Ritwandanu; Herman Wahyudi; Yudhi Lastiasih; Hamim Mufijar
Journal of Infrastructure & Facility Asset Management Vol 6 (2024): Special Issue 3 : Journal of Infrastructure & Facility Asset Management
Publisher : Departemen Teknik Sipil, Institut Teknologi Sepuluh Nopember

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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
Comparation of Limit Equilibrium Method (LEM) 2D on Safety Factor and Embankment Reinforcement Aisiyah Pramaisela Hapsari; Yudhi Lastiasih
Journal of Infrastructure & Facility Asset Management Vol 6 (2024): Special Issue 3 : Journal of Infrastructure & Facility Asset Management
Publisher : Departemen Teknik Sipil, Institut Teknologi Sepuluh Nopember

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The analysis of slope stability is crucial during embankment planning to ensure safety and prevent landslides. A stable slope ensures the safety of surrounding infrastructure, minimizing the risk of damage. Therefore, with slope stability analysis can manage and maintain infrastructure assets. The primary method used to evaluate slope stability is the Limit Equilibrium Method, frequently employed in a 2D framework using various applications such as Plaxis LE and Geostudio. Using diverse applications for analysis can yield varying safety factors, influencing the required reinforcement. Hence, this study analyzed safety factors and the necessary geotextile reinforcement for embankments on soft soil featuring distinct heights, slopes, and widths in 2D. The analysis was performed using the Plaxis LE application, and the results were subsequently compared with those obtained from the Geostudio application. This research shows that the results of the embankment safety factors with the Plaxis LE application are different from those of the embankment safety factors with Geostudio, resulting in different embankment geotextile reinforcement namely the need for Plaxis LE geotextile reinforcement = 0.7 Geostudio geotextile reinforcement.
The 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’ Udukha
Journal of Infrastructure & Facility Asset Management Vol 7 (2025): Special Issue 3 : Journal of Infrastructure & Facility Asset Management
Publisher : Departemen Teknik Sipil, Institut Teknologi Sepuluh Nopember

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The North Ring Road of Lamongan Project Section I, which stretches from Sta. 0+000 to Sta. 3+265, is indicated to be built on soft silt soil. This paper discusses the effect of Prefabricated Vertical Drains (PVDs) length on the amount of settlement that occurs in soft soil. The method used was to compare the installation of PVDs at a quarter, half and three quarters of the thickness of the compressible soil layer. The varying lengths of PVDs were modeled on PLAXIS2D software. The results show that the longer PVDs are installed in the compressible soil, the greater settlement occurs.
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 Fanny Rumintha Br Barimbing; Yudhi Lastiasih; Herman Wahyudi; Sifa` Udukha
Journal of Infrastructure & Facility Asset Management Vol 7 (2025): Special Issue 3 : Journal of Infrastructure & Facility Asset Management
Publisher : Departemen Teknik Sipil, Institut Teknologi Sepuluh Nopember

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Abstract

The construction of the Lamongan North Ring Road is planned to be built on softsoil. Based on the results of the soil investigation, it is known that the subgradecondition is classified as soft to very soft soil with a depth of 18 meters. One of theproblems of this very soft soil is the settlement. Therefore, the National RoadImplementation Agency of East Java - Bali Region conducted subgrade improvementusing preloading combined with Prefabricated Vertical Drain (PVD). The configurationof the PVD installation is 18 meters deep with a triangular pattern and the distancebetween PVDs is 1 meter. To stake the PVDs 18 meters deep, a piling rig with aminimum height of 24 meters is required. In the STA 0+400 to STA 0+426 section thereis a 150 kV Lamongan - Paciran High Voltage Air Line (SUTT) cable crossing the roadwith a conductor to platform distance of 18 meters. The existence of this cable is achallenge in the PVD driving as deep as 18 meters. Therefore, this journal will analyzethe PVD piling implementation method that can be carried out in this segment. Themethod carried out in this study is to start with the collection of secondary data such asshop drawings as a reference for the implementation of work in accordance with theplanned design. Based on the design plan, an implementation method that can beapplied to limited vertical clearance conditions is obtained. Based on the results of theresearch, an 18-meter deep PVD installation method was obtained that can be applied tolimited vertical clearance conditions in the Lamongan North Ring Road constructionproject Section 1 STA 0+400 to STA 0+426. In addition, it was also found that the timerequired was 34.75 minutes to stake 1 PVD point using the pulled hole PVD method.
Co-Authors Agustinus Junianto Aisiyah Pramaisela Hapsari Fanny Rumintha Br Barimbing Frans Andre Sasarari Hamim Mufijar Henniko Okadha Herman Wahyudi Herman Wahyudi Ruri Febri Ritwandanu Sifa` Udukha Sifa’ Udukha