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All Journal Jurnal Riset Rekayasa Sipil Matriks Teknik Sipil
Bambang Setiawan
Universitas Sebelas Maret Surakarta
Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Engineering Environmental Science Materials Science & Nanotechnology

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PENGARUH VARIASI LAPIS GEOSINTETIK TERHADAP SAFETY FACTOR TIMBUNAN DI ATAS TANAH LUNAK Bambang Setiawan; Raden Harya Dananjaya; Fitria Anggraeni
Matriks Teknik Sipil Vol 8, No 1 (2020): Maret
Publisher : Program Studi Teknik Sipil FT UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/mateksi.v8i1.41527

Abstract

Tanah lunak merupakan jenis tanah yang sering dijumpai di Indonesia. Tanah lunak merupakan jenis tanah yang tidak aman untuk didirikan konstruksi di atasnya. Hal tersebut terjadi dikarenakan beberapa sifat tanah lunak yaitu memiliki nilai CBR dan N-SPT yang rendah, gaya geser yang rendah, kadar air tinggi, koefisien permeabilitas yang rendah, daya dukung yang rendah, dan resiko adanya settlement atau penurunan yang besar. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh variasi lapis geosintetik terhadap perubahan nilai safety factor, settlement, dan tegangan tanah pada tanah lunak. Variasi yang digunakan pada penelitian ini adalah variasi jenis geosintetik, jumlah lapis geosintetik, dan jarak antar lapis geosintetik. Penelitian ini merupakan penelitian kuantitaif melalui pengumpulan data sekunder serta pemodelan dengan analisis metode elemen hingga (MEH). Hasil penelitian menunjukkan bahwa variasi lapis geosintetik paling optimum dapat meningkatkan nilai safety factor sebesar 23,79%, menurunkan nilai settlement sebesar 2,60%, dan meningkatkan tegangan tanah sebesar 0,17%.
PRELIMINARY STUDY ON PLASTICINE AS A SUBSTITUTE COHESIVE MATERIAL FOR GEOTECHNICAL PHYSICAL SOIL MODELING Yusep Muslih Purwana; Bambang Setiawan; Raden Harya Danajaya; Brilliant Bagaskara
Jurnal Riset Rekayasa Sipil Vol 4, No 2 (2021): Maret 2021
Publisher : Prodi Teknik Sipil FT Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (796.315 KB) | DOI: 10.20961/jrrs.v4i2.49197

Abstract

Plasticine is an artificial material made from solids such as gypsum, lime, mixed with petroleum jelly or micro wax and acid fat. The properties of plasticine are likely similar to natural clay and is influenced by oil content. The information about mechanical properties of plasticine is still very rare, and as such the study on it is riquired and must be conducted intensively. The preliminary laboratory study has been conducted to understand the behaviour of plasticines. Microwax and petroleum jelly based plasticines were utilised with the variation of oil content, whereas kaolin clay with the variation of water content is utilised as a reference material. The study is focusing on the stress-strain behaviour for both microwax and petroleum jelly based plasticines compared to the stress-strain behaviour of kaolin clay. This paper reports the result of preliminary investigation regarding the use of plasticine as an alternative artificial material for substitution of clay in soil modeling. Some engineering properties from unconfined compression strength (UCS) test and hand penetrometer are shown. The result indicates that the stress-strain behaviour of plasticine resembles the stress-strain behaviour of kaolin clay. The plasticine is suitable as a substitute cohesive material and it has a potential to be utilised for geotechnical material modelling in the future.
PEMBEBANAN MODEL PELAT SKALA KECIL PERKERASAN KAKU (RIGID PAVEMENT) DI ATAS TANAH PASIR Bambang Setiawan; Yusep Muslih Purwana; Raden Harya Dananjaya H.I
Jurnal Riset Rekayasa Sipil Vol 6, No 2 (2023): Maret 2023
Publisher : Civil Engineering Study Program, Engineering Faculty Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (611.036 KB) | DOI: 10.20961/jrrs.v6i2.72473

Abstract

Road infrastructure issues need great attention, considering that this was a link and a cross-economy between one region and another. Damage to the pavement (pavement) would have fatal consequences for the development of an area and an increase in financial needs. Therefore, it was necessary to strengthen a solid road body so that it was able to strengthen the road and be comfortable for traffic loads to pass. Damage to the road body was a major concern in road maintenance efforts. This was due to several very complex problems in terms of the materials used, work implementation, traffic loads passing through the road body, and existing natural conditions. This research studies and analyses the behavior of dynamic-loaded rigid pavements. This load was a traffic load model, and the behavior was reviewed in a small-scale laboratory model. The expected result was to know the model’s behavior with and without rigid pavement reinforcement on both sandy and soft soils, namely in the form of analysis and the ability of the reinforcement to accept traffic loads. This research showed that the plate test model shows that multiple plate thickness supports plate stiffness. The cakar reinforcement plate affected the stiffness of the plate. The deflection value due to loading on the 3-layer plates (6.3 mm thick) was comparable to the 1-layer plate (2.1 mm) with cakar. FEM analysis can be performed to predict deflection due to loading in the center of the plate, and this value was very close to the results of the laboratory small-scale loading test. The CBR value used to calculate the deflection was closest to the real condition, namely the value before loading 0.2 kN and after loading 0.8 kN.
Co-Authors Brilliant Bagaskara Fitria Anggraeni Raden Harya Danajaya Raden Harya Dananjaya Raden Harya Dananjaya H.I Yusep Muslih Purwana Yusep Muslih Purwana