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All Journal Journal of Geosciences and Applied Geology
Ismawan Ismawan
Faculty of Geological Engineering, Universitas Padjadjaran
Earth & Planetary Sciences Engineering

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SETTLEMENT IN THE NOTHERN PART OF BEKASI REGENCY, WEST JAVA PROVINCE, BASED ON CONE PENETRATION TEST DATA Siti Nadia Jatsiah; Ismawan Ismawan; Nur Khoirullah; Tulus Pramudyo
Journal of Geological Sciences and Applied Geology Vol 7, No 2 (2023): Journal of Geological Sciences and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v7i2.49996

Abstract

In the nothern part of Bekasi Regency, the soil layers are dominated with alluvial deposit, especially clay and silt deposit. It makes the potential of the settlement in this area is getting higher. In this research, Cone Penetration Test (CPT) have been done to determine the soil layers from the surface till the 20 meters depth and to identify other soil properties, such as unit weight, compression index, swelling index, void ratio, etc. This research aims to analyze the total settlement in the northern part of Bekasi Regency based on CPT data. The total settlement is calculated by using the theory of One-Dimensional Primary Consolidation based on CPT data. The research area shows that the highest result of total settlement calculation is in the northern part of research area which directly adjacent to the Java Sea. It can be happened because the clay layers in northern part is way thicker than the other area.
Tectonic Activity Response Based on Geomorphic Index In Pasirmunjul, Sukatani, Purwakarta Regency, West Java Alif Pradifta; Ismawan Ismawan; Aldrin Ramadian
Journal of Geological Sciences and Applied Geology Vol 6, No 1 (2022): Journal of Geological Science and Applied Geology
Publisher : Faculty of Geological Engineering, Universitas Padjadjaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24198/gsag.v6i1.45227

Abstract

The study area administratively located in Sukatani sub-district, Purwakarta Regency, West Java. This study is aim to determine the level of tectonic activity in the study area using a quantitative geomorphological approach. The geomorphic indices that used in this research are the Mountain Front Sinusity (SMF), Ratio of valley floor width to valley height (Vf), Hipsometric Integral (HI), Drainage Basin Shape (BS), and Asymmetry Factor (AF). Then, these parameters of geomorphic index, are included in the calculation of the Relative Tectonic Activity Index (IATR) which is show the distribution of tectonic activity levels in the study area. The results of the analysis Relative Tectonic Activity Index (IATR) show that the study area is divided into 3 classes of tectonic activity, namely class 2 (high), class 3 (medium), and class 4 (low). Class 2 occupies about 19.5% of the study area with an area of 7.6 km2 which is spread over the western part of the study area. Class 3 occupies about 79.8% of the study area with an area of 31.4 km2 which is spread dominantly in the study area. While class 4 (low), which occupies about 0.7% of the study area with an area of 0.28 km2 which is spread in the northern part of the research area. In general, the study area has a fairly balanced between level of tectonic activity with an erosion activity, but in the western part of the study area tended to be more dominated with tectonic activity than the erosion activity, which was indicated due to the influence of the structure in the area and caused a catastrophic ground motion in surrounding area.
Co-Authors Aldrin Ramadian Alif Pradifta Nur Khoirullah Siti Nadia Jatsiah Tulus Pramudyo