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All Journal Interdisciplinary Social Studies Riwayat: Educational Journal of History and Humanities
Herman Wahyudi
Institut Teknologi Sepuluh Nopember
Humanities Education Environmental Science Languange, Linguistic, Communication & Media Public Health Social Sciences

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Effectiveness and Stability Analysis of Embankment Using Lightweight Embankment (Eps Geofoam and Foam Mortar) on Pasuruan - Probolinggo Toll Road Project Section 4 Ruri Febri Ritwandanu*; Herman Wahyudi; Yudhi Lastiasih; Hamim Mufijar
Riwayat: Educational Journal of History and Humanities Vol 6, No 4 (2023): Educational, Historical Studies and Humanities
Publisher : Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jr.v6i4.36807

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 internal stability 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
Analysis of Excavated Slope Stability on the TRSS of Blitar Regency with a Cracked Soil Approach Muhammad Arifian Ilham; Herman Wahyudi; Yudhi Lastiasih
Interdisciplinary Social Studies Vol. 5 No. 1 (2025): Regular Issue: October-December 2025
Publisher : International Journal Labs

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55324/iss.v5i1.985

Abstract

The construction of the Southern Cross Line (JLS) in East Java Province is part of the National Strategic Project which aims to reduce the disparity between the northern and southern regions of Java Island. In STA 17 + 850 of the Bululawang–Sidomulyo–Tambakrejo section, the excavated slope of ±30 m high composed of limestone rocks experienced two landslides in the same segment (slope 2 and slope 3), although slope geometry has been improved through regrading from a slope of 71.6° to 45°. This study aims to analyze the main causes of landslides at the location using the cracked soil approach, as well as evaluate the effect of slope slope on the safety factor (SF) value. The concept of cracked soil refers to the existence of cracks, it can be in the form of fine cracks that are not visible visually or wide cracks, these cracks can function as rainwater infiltration pathways that can trigger collapse. The soil condition on the slope is modeled as a "behaving like sand" material with a "drained" condition (c = 0 and ? = ?). The analysis method was carried out using the Finite Element Method (FEM) with the Plaxis 2D auxiliary program through two main models. Model 1 models the soil material to be "behaving like sand" (c = 0 and ? = ?), so that the collapse is completely controlled by the inner shear angle in the absence of cohesion. Model 2 includes a polygon such as ground cracks placed on or near a slip plane, thus facilitating a specific c = 0 on that plane with variations in the width and depth of the cracks. Stability analysis at the initial conditions (after excavation) showed an SF value of >> 1, which did not yet represent the landslide conditions in the field. Through the cracked soil approach, an SF value of < 1 was obtained for both slope slope variations, both in model 1 and model 2. These results show that the cracked soil approach can be applied to explain the mechanism of landslides on the slope of STA 17 + 850 of the Bululawang-Sidomulyo-Tambakrejo Section.
Co-Authors Hamim Mufijar Lastiasih, Yudhi Muhammad Arifian Ilham Ruri Febri Ritwandanu* Yudhi Lastiasih