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Author: search.filters.author.Chaiyaput, SalisaSubject: search.filters.subject.Shear wave velocity

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    A Case Study of Soil Resistance Microzonation Based on Shear Wave Velocity
    (2025-06-01)
    Adrian, Mellanie Novita
    ;
    Mase, Lindung Zalbuin
    ;
    Hardiansyah, Hardiansyah
    ;
    Misliniyati, Rena
    ;
    Supriani, Fepy
    This study, unique in its focus on the Kepahiang Regency, Bengkulu Province, aims to analyse soil characteristics and their potential impact on infrastructure stability using shear wave velocity (V<inf>s</inf>) data from 30 microtremor points spread across Kepahiang. The analysis produces a soil layer profile, shear wave velocity variations at various depths, Vs distribution maps, soil classifications, and ground amplification factors. The study reveals a significant risk of soil resilience effects in the area, primarily due to the dominance of class C soil, which consists of very dense soil and soft rock, and class D soil, which is rigid. The high amplification factor caused by the low average shear wave velocity to a depth of 30 m also affects soil resistance. This research contributes significantly to geotechnical risk mitigation efforts, safer spatial planning, and infrastructure development resistant to landslides in the Kepahiang Regency.
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    Site Characteristics of Musi Fault Zone in Kepahiang Urban Area, Bengkulu Province, Indonesia
    (2024-08-01)
    Mase, Lindung Zalbuin
    ;
    Refrizon
    ;
    Pakpahan, Ninety Seven
    ;
    Shelina, Aza
    ;
    Wu, Jiujiang
    This paper presents the site characteristics of the Musi Fault Zone in the Kepahiang Urban Area. The measurement using multichannel analysis of surface waves (MASW) is also conducted to obtain the preliminary ground profile and shear wave velocity. The ambient noise measurement is performed to obtain the basic geophysical information interpreted into horizontal to vertical spectral ratio (H/V). The inversion technique is conducted to generate a shear wave velocity (V<inf>s</inf>) profile. Several parameters, such as the time-averaged shear wave velocity for the first 30 m depth (V<inf>s30</inf>), site class, and depth of engineering bedrock, are also discussed. The results showed that intact clays, fissured clays, weathered rock, gravel, and sand dominate the soil layer structures in the study area. V<inf>s30</inf> ranges from 192 to 626 m/s, which indicates Site Classes C and D in the study area. The surface of engineering bedrock is generally found from 31 to 126 m below the ground surface.