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All Journal Potensi : Jurnal Sipil Politeknik Borneo Engineering: Jurnal Teknik Sipil Industrial Research Workshop and National Seminar
Dewi Amalia
Jurusan Teknik Sipil Politeknik Negeri Bandung
Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation Other

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Pengaruh Biopolimer Pada Stabilitas Lereng Swelling soil Dewi Amalia; Bagus Guritno; Hendry Hendry; Geni Firuliadhim
Borneo Engineering : Jurnal Teknik Sipil Volume 5 Nomor 3 Tahun 2021
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v5i3.2099

Abstract

Many studies have begun to develop the concept of cracked soil. The results of research related to cracked soil are able to answer the irregularities that occur, such as the difference in the results of the stability analysis which is considered safe with the conventional bishop method, while the conditions in the field are landslides. Swelling soil is soil that is susceptible to changes in water content. This type of soil is very prone to cracking. To build infrastructure on the swelling soil type, an improvement must be made, one of which is by mixing the swelling soil with biopolymer. The results of this biopolymer mixing are then modeled in the New Slope Stability Analysis Program (NSSAP) 1.0 which refers to the concept of cracked soil. From the analysis, it was found that the slope safety factor before improvement with biopolymer was 0.305 and the safety factor after improvement with biopolymer was 2.006. From the results of this study, it can be seen that the role of biopolymers in stabilizing swelling soil is quite large, which is around 558%.
PENERAPAN KONSEP BARU CRACKED SOILS PADA PENANGULANGAN KELONGSORAN LERENG (STUDI KASUS : PEMBANGUNAN GEDUNG RESKRIMSUS POLDA KALIMANTAN TIMUR, BALIKPAPAN) Dewi Amalia; Indrasurya B Mochtar; Noor Endah Mochtar
Prosiding Industrial Research Workshop and National Seminar Vol 9 (2018): Industrial Research Workshop and National Seminar
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2080.586 KB) | DOI: 10.35313/irwns.v9i0.1043

Abstract

Hasil analisa stabilitas lereng dengan tanah cukup kaku didasarkan pada kondisi terekstrim yaitu kondisi saturated akibat hujan dari lereng di area pembangunan gedung Reskrimsus Polda Kalimantan Timur, Balikpapan menunjukkan angka keamanan, SF>1. Hal ini berarti lereng tersebut kondisi aman walaupun ketika terjadi hujan. Pada kenyataannya, setelah lereng diguyur hujan dengan intensitas sangat lebat, lereng bergerak yang mengakibatkan kerusakan struktur di sekitarnya. Fenomena ini dapat dijawab dengan the concept of cracked soil yang mengakomodir keberadaan retak pada lereng dan pengaruh intensitas hujan yang belum banyak diperhatikan dalam menganalisa stabilitas lereng sampai saat ini. Retakan yang terinfiltrasi air hujan pada saat hujan sangat lebat akan menentukan stabilitas lereng. Parameter pada retakan ini berbeda dengan parameter tanah utuh dimana tanah tersebut dianggap berperilaku seperti pasir (c=0 dan f≠0) dan pada retakan tersebut akan terbentuk pore water pressure build up ketika hujan sangat lebat terjadi. Hasil dari analisa ulang yang dilakukan dengan konsep baru tersebut, lereng yang pada awalnya diprediksi aman (SF>1) ternyata longsor (SF<1). Secara garis besar diusulkan konsep untuk menanggulangi kelongsoran tersebut.
PERENCANAAN PRELOADING DENGAN PENGGUNAAN PREFABRICATED VERTICAL DRAIN UNTUK PERBAIKAN TANAH LUNAK PADA JALAN TOL PEJAGAN-PEMALANG Athaya Zhafirah; Dewi Amalia
Potensi: Jurnal Sipil Politeknik Vol 21 No 1 (2019): Potensi: Jurnal Sipil Politeknik
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (958.152 KB) | DOI: 10.35313/potensi.v21i1.1314

Abstract

alan Tol Pejagan-Pemalang merupakan bagian dari jaringan Jalan Tol Trans Jawa yang menjadisolusi dari permasalahan kemacetan di Jalur Pantai Utara (Pantura). Jalan Tol Pejagan -Pemalangberada di atas tanah lunak yang akan menimbulkan permasalahan geoteknik, seperti daya dukung tanahdasar yang rendah, stabilitas timbunan, dan penurunan yang besar serta berlangsung dalam jangkawaktu yang lama. Tanah dasar yang lunak tersebut tidak mampu untuk menahan beban total timbunanrencana yaitu 8,9 m. Tinggi timbunan maksimum yang mampu ditahan oleh tanah dasar tersebut adalah5 m. Dengan memperhatikan penurunan total yang terjadi, tinggi timbunan pada saat pelaksanaan haruslebih tinggi dari tinggi timbunan rencana. Tinggi timbunan pada saat pelaksanaan akhir adalah 11 mdengan penurunan total yang terjadi sebesar 2,122 m dalam waktu 38,49 tahun. Masalah ini dapatdiatasi dengan memperbaiki tanah dasar menggunakan PVD yang dioptimalkan dengan preloading.PVD adalah lembaran plastik untuk drainase vertikal yang panjang berbahan komposit, terdiri daridrain core dan filter jacket. Dari hasil perencanaan, PVD yang digunakan adalah tipe Ce-Teau DrainCT-882 dengan pola segiempat jarak 1,2 m sedalam 10 m dari muka tanah asli. Penimbunan dilakukanbertahap dengan kecepatan penimbunan 1 m perminggu. Waktu yang dibutuhkan untuk mencapaipenurunan total sebesar 2,122 m dengan metode preloading kombinasi PVD adalah 11 minggu.Biayayang dibutuhkan untuk melakukan pekerjaan penimbunan dan pemasangan PVD sesu ai dengan desainadalah Rp. 3.446.349.317,-.
Pengaruh Penambahan Polimer Poliakrilamida Terhadap Plastisitas dan Daya Dukung Tanah Lokal Sebagai Material Timbunan Anna Dewi; Dewi Amalia; Lindung Zalbuin Mase; Ery Radya Juarti; Apip Pudin
Borneo Engineering : Jurnal Teknik Sipil Volume 6 Nomor 3 Tahun 2022
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v1i1.2897

Abstract

The difficulty of obtaining embankment material as a road foundation is one of the problems in the construction of road infrastructure. Furthermore, soil with a low bearing capacity value can damage the road structure. Soil improvement with local soil stabilization is an effective solution to reduce construction costs in the procurement of embankment material. However, the soil quality in an area varies and does not always meet the requirements of the embankment material. From this, it can be concluded that there is need for soil improvement, one of which is soil stabilization with polymer. In this study, Cisasawi soil material was mixed with synthetic polymer polyacrylamide (PAM) in concentrations ranging from 0,2%, 0,4%, 0,6%, 0,8%, and 1%, and then atterberg limits and CBR laboratory were determined. At the end,  an observations was made to the effect of adding PAM for plasticity and bearing capacity of soil. The results of the tests show that adding PAM to the original soil can reduce the plasticity value by 22,27% and increase the bearing capacity by 21,0% and 29,2% in unsoaked and soaked condition. According to the findings of this study, the role of PAM can increase the bearing capacity of the original soil, causing the soil to become embankment material. 
Numerical Study of Soft Soil Improvement Using Prefabricated Vertical Drain in Paser Airport East Kalimantan, Indonesia Aditia Febriansya; Dewi Amalia; Mulyadi Yuswandono; Antonius Siswanto; Sinta Nuraeni; Talitha Rahma Avinka
Potensi: Jurnal Sipil Politeknik Vol 24 No 1 (2022): Potensi: Jurnal Sipil Politeknik
Publisher : Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/potensi.v24i2.4744

Abstract

In this article, the effect of using Prefabricated Vertical Drain as a soil improvement on the time it takes for consolidation to settle in the construction of runway embankments at Paser Airport, East Kalimantan, Indonesia using numerical methods will be discussed. Based on the Indonesian Soft Soils Distribution Map and the results of the Standard Penetration Test conducted the runway area is dominated by soft clay to a depth of 24 meters. The characteristics of soft soils have low shear strength, high compressibility and low permeability which can cause large settlements over a long period of time. In numerical analysis, Prefabricated Vertical Drain is combined with preloading to speed up consolidation time. Based on the analysis results, the minimum pore pressure condition before soil improvement is reached within 36.36 years, whereas after soil improvement, the time for settlement is significantly reduced to 0.17 years or 63.22 days. The preloading height is calculated so that the final embankment elevation is reached when the settlement has been completed. Manual analysis was performed to obtain a comparison of the duration of settlement using numerical methods.
Co-Authors Aditia Febriansya Anna Dewi Antonius Siswanto Athaya Zhafirah Bagus Guritno Ery Radya Juarti Geni Firuliadhim Hendry . Indrasurya B Mochtar Lindung Zalbuin Mase Mulyadi Yuswandono Noor Endah Mochtar, Noor Endah Sinta Nuraeni Talitha Rahma Avinka