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All Journal MEDIA KOMUNIKASI TEKNIK SIPIL Jurnal Teknik Sipil Cendekia (JTSC)
Wijaya, Nehemia
Unknown Affiliation
Civil Engineering, Building, Construction & Architecture

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Uji CBR (California Bearing Ratio) pada Tanah Lempung Stabilisasi Abu Marmer dan Biogrouting Waruwu, Aazokhi; Pangemanan, Indah; Yunita, Yulia; Calvin, Fransiscus; Lujaya, Jason; Wijaya, Nehemia
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 30, Nomor 1, JULI 2024
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/mkts.v30i1.58304

Abstract

The existing subgrade for road construction is quite diverse, and sometimes it does not meet the standards for construction subgrade. Repair efforts are needed if the existing land has a fairly low CBR (California Bearing Ratio) value. Stabilization materials for soil improvement can use waste in the form of marble ash, and as a comparison in this research improvements were also conducted using the biogrouting method. The aim of this research is to obtain the effect of marble ash stabilization and biogrouting on the CBR value. The research was carried out through CBR tests on a physical model of soil stabilized with 3-6% marble ash and soil improved using the bacteria bacillus subtilis and bacillus amyloliquefaciens. Tests are differentiated based on the thickness of the stabilized soil, which is 10–30 cm. The research results showed that marble ash-stabilized soil resulted in a better increase in CBR values compared to soil improved using the biogrouting method. CBR values that meet standards for road construction base soils are obtained on soil stabilized with 6% marble ash with a minimum stabilized soil layer thickness of 20 cm.
Effect Of Earthquake Forces On Columns With Different Strengthening Using Sap2000 Software Purba, Sadvent; Wijaya, Nehemia
JURNAL TEKNIK SIPIL CENDEKIA (JTSC) Vol 6 No 1 (2025): February
Publisher : Departement of Civil Engineering, Universitas Winaya Mukti

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51988/jtsc.v6i1.268

Abstract

Indonesia is an area that has quite a high frequency and strength of earthquakes because it is at the meeting point of four tectonic plates, namely the Eurasian plate, the Indo-Australian plate, the Pacific plate and the Philippine Sea plate. Earthquake-resistant buildings are an alternative to minimize the impact of earthquake forces that occur. One design that needs to be analyzed is that there are openings in the building wall structure that cause the columns not to bend properly when receiving lateral forces, so they have the potential to fail. A collapsing column will cause the load of the building floor above it to collapse. Through this research, the influence of the frequency of earthquake forces, the influence of earthquake forces on the deviation between floors, and the location of the collapse in building models A (without walls) and B (with walls) will be identified. The method used is dynamic load analysis in SAP2000 based on spectrum response. Based on the results of the SAP2000 analysis, it can be seen that the deviation value between floors is smaller in building model B (with walls), thus indicating short column with lower heights absorb more energy and have stiffer properties. The location of the collapse is not visible in the SAP2000 analysis, but the largest deformation occurs in the beam for both building models.
Co-Authors Aazokhi Waruwu Calvin, Fransiscus Lujaya, Jason Pangemanan, Indah Purba, Sadvent Yunita, Yulia