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Pengaruh Beban Kendaraan sebagai Beban Terbagi Rata terhadap Deformasi Geogrid sebagai Perkuatan Embankment Adhe Noor Patria
Dinamika Rekayasa Vol 8, No 1 (2012): Dinamika Rekayasa - Februari 2012
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2012.8.1.57

Abstract

Soft soil such as clay was sensitive soil. Public contructions built in this kind of soil would face some problemssuch as long period consolidation time, unstable embankment slope, not easily compacted and high level settlement. Some solution that could be suggested were the usage of vertical drain, or the usage of geosynthetics material such as geogrid combined with floating  piles.Analysis was carried out by using plaxis version 7.2. soil for embankment and embankment foundation was modelled in plane strain. Also geogrid andfloating piles were modelled in palne strain too. Surcharge load on top of embanknet were variated, they were 20, 35 and 50 kPa. The simulation was carried out in staged contruction mode.Final vertical displacement in geogrid due to 50  kPa vehicle load as surcharge load and long term load period (in this case excess pore water pressure was small) was -0,9062 m for  rigid embankment and -1,4206 for interface embankment. The difference occured due to slip at the interface of geogrid and soil. It  leaded to adding soil mass supportd by geogrid, furthermore the deflection of geogrid became bigger.
Pengaruh Pembuatan Terasering Pada Lereng Terhadap Potensi Longsor Sumiyanto Sumiyanto; Adhe Noor Patria
Dinamika Rekayasa Vol 6, No 2 (2010): Dinamika Rekayasa - Agustus 2010
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2010.6.2.35

Abstract

Indonesia is one country with the population growth rate is large. This condition will require the opening of new land for settlement. Limited land sometimes requires people to open new land on the slope areas. Opening of new land on the slopes will use the method of cutting the slope to get flat land (terrace). Cutting this slope would result in increased potential for landslides due to slope stability menurunya. Evaluation needs to be done at the opening of new land on the slopes, where the slope should remain stable after the porch is made. This research was conducted to evaluate the maximum terrace width was in stable condition. The model used in this study is a plane strain by the count to element method. The main purpose of this research is to obtain the maximum terrace width formula on a slope. Dilakukan analysis on three ).�), cohesion, (c) and angle of internal friction (�variables, namely slope( Variations to the variable angle between 30o-55o intervals 5o, 5 kN/m2 cohesion between-25 kN/m2 with intervals 5 kN/m2, and internal friction angle between 20o-45o intervals 5o. Maximum terrace width count conducted for each combination of these variables. Formulation of the maximum terrace width is done by multiple linear regression methods, linear nin and a combination of both. Determining the best formula is based on the value of the correlation koofisien. Results formulations have two formulasis the formula for the maximum slope of the natural slope and a maximum width of the terrace on a slope.
Analisis Deformasi Vertikal Dan Horisontal Tanah Lunak Di Bawahpiled-Geogrid Supported Embankment Adhe Noor Patria
Dinamika Rekayasa Vol 6, No 2 (2010): Dinamika Rekayasa - Agustus 2010
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2010.6.2.33

Abstract

Soft soil was easily founded in Indonesia. it was a low permeability soil. Constructing building such as embankment, roads on this kind of soil often faced problems. They were long term settlement, long term construction time and consolidation. Some method could be good alternative to overcome these problems such the usage of vertical drains, soil reinforcement, orsoil stabilization. This research carried out numerical simulation on piled-geogrid supported embankment. The simulation used Plaxis version 7.2 software to calculate some iterations. Used in this software as soil parameter input was Mohr-Coulomb Soil Model. Plane strain model was used for floating piles and geogrid. The results showed that the usage of floating piles and geogrid could reduce soil deformation. The reduction in horizontal deformation during contructing embankment were 60 to 68 % for rigid embankment and 80 to 60 % for interface embankment. Meanwhile the reduction in vertical deformation during contructing embankment were 60 to 65 % for rigid embankment and 80 to 65 % for interface embankment..