Article Per Year (5 Year)
p-Index From 2020 - 2025
0.444
P-Index
This Author published in this journals
All Journal International Conference on Coastal and Delta Areas Journal of Advanced Civil and Environmental Engineering Neo Teknika: Jurnal Ilmiah Teknologi Jurnal Civil Engineering Study
Lisa Fitriyana
Unknown Affiliation
Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Electrical & Electronics Engineering Environmental Science Industrial & Manufacturing Engineering Other

Published : 4 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 4 Documents
Search

 1 
Increase the Strenght of Base and Subbase of Flexible Pavement by adding Fledspar as additive material Gatot Rusbintardjo; Lisa Fitriyana; Nur Izzi M. Yusoff; Arafat Suleiman Yero
JACEE (Journal of Advanced Civil and Environmental Engineering) Vol 2, No 2 (2019): October
Publisher : Universitas Islam Sultan Agung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30659/jacee.2.2.59-64

Abstract

The strength and durability of the flexible pavement is highly dependent on the quality of the aggregate material used for base and subbase layers. This is can be understand since  95 percent of the weight-volume of the base and subbase layer is aggregate. Therefore using a good quality and strong base and subbase material is very important. In this paper, which is a report of a reseacrh,  Feldspar is used as stabilizer of base and subbase materlias of flexible pavement. Feldspar  is a group rock-ftant forming tectosilicate minerals that made up about 41% of the earth’s continental crust by weight. 5 to 25% of Feldspar with increment of 5% by weight of the base and also subbase were added. Direct Shear and California Baring Ratio (CBR) test were conducted., beside water content and dry density test. The results of direct shear  test show that cohesion of base and subbase materials decrease from 0,164 kg/cm2 of original base and subbase materials become 0,01 kg/cm2 for base and subbase material after adding with 25% of Feldspar, and angle of inernal friction increase from 47,670 become 49,800. Meanwhile the results of CBR test show that CBR value of base increase from 30% to 86,40%, as well as for subbase increase from 21,50% to 87,30% after adding with 15% of Feldspar. It can be concluded that adding aggregate of base and subbase with Feldspar the strenght improve signicantly, and the influence is the strengthening of the base and subbase layers.
Perkuatan Turap Baja Terhadap Gaya Lateral Berlebih Pada Galian Tanah Lunak Widayat Amariansah; Antonius Antonius; Lisa Fitriyana; Moch Dony Febriansyah
Neo Teknika Vol 7, No 1 (2021): Jurnal Neo Teknika Volume 7 Nomor 1 Juni 2021
Publisher : Universitas Pandanaran

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37760/neoteknika.v7i1.1832

Abstract

Galian konstruksi bangunan pada tanah lunak di daerah pantai Tambak Lorok Semarang memerlukan turap penahan tanah agar tidak longsor. Turap dari baja dibuat stabil terhadap gaya lateral, momen, gaya dalam dan potensi terangkatnya permukaan tanah dasar galian. Jika timbul tekanan tanah lateral yang berlebih di belakang turap, muka air tanah yang tinggi, pengurangan tekanan tanah pasif akibat pengerukan, perubahan kedalaman galian dan pemasangan turap yang tidak mengunci satu dengan lainnya, maka turap dapat mengalami deformasi lateral. Oleh sebab itu diperlukan perkuatan struktur turap secara struktural yaitu balok pengaku horisontal (strut) dan penopang (rakes)serta perkuatan non struktural yaitu metode penggalian secara bertahap yang diikuti pengecoran struktur dari dasar galian secara segmental. Cara ini cukup efektif menstabilkan tanah lunak di sekeliling galian sampai pengecoran struktur bawah bangunan selesai dikerjakan. Kata kunci : Perkuatan, turap baja, gaya lateral, tanah lunak
Assessment of Geotechnical Feasibility in Development of STIE BPD Semarang Lisa Fitriyana
International Conference on Coastal and Delta Areas Vol 3 (2017): The 3rd International Conference on Coastal and Delta Areas
Publisher : International Conference on Coastal and Delta Areas

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Geotechnical studies are an early stage for planning an infrastructure. In general, the geotechnical parameter value of a region is determined by soil characteristics. To know the condition of the soil layer under the structure, it is necessary geotechnical investigation. Toptografi uneven shape and the value of the low bearing capacity causes the need for planning the reinforcement. The reinforcement used is soil nailing and retaining wall. In this feasibility test used analysis of soil bearing capacity with plaxis program. The results of the analysis show that the reinforcement at the construction site of STIE BPD raises the value of its Savety Factor reaching 5.83.  Keywords: Geotechnical investigation, soils bearing capacity, reinforcement.
Analisis Stabilitas Pondasi Terhadap Rembesan Dan Piping Pada Bendungan (Studi Kasus Bendungan Jragung Kabupaten Semarang) Riko Bagus Setiyawan; Rekhan Farras Sutrisno; Abdul Rochim; Lisa Fitriyana; Ahmad Hidayawan
Jurnal Civil Engineering Study Vol. 5 No. 02 (2025): Jurnal Civil Engineering Study
Publisher : Civil Engineering of Universitas Islam Nahdlatul Ulama Jepara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34001/ces.v5i02.1545

Abstract

The dam foundation is a basic structure that meets the requirements as a supporting sector for dam construction and ensures safety against one of the serious threats in the form of seepage and Piping. Therefore, analyzing the stability of the dam foundation against seepage and Piping is necessary. This study uses the Finite Element program to analyze stability, seepage, and Piping under Normal Water Level conditions. Dam stability analysis is carried out by adding earthquake load coefficient factors OBE (Operating Basis Earthquake) and MDE (Maximum Design Earthquake). The analysis is carried out in two stages, namely the first stage without additional repairs and the second stage with additional repairs in the form of Curtain Grouting and Cut-off wall. Under Normal Water Level conditions without earthquakes or with OBE and MDE 1.00H earthquakes, the stability of the foundation in Existing conditions, Alternative 1, and Alternative 2 meets the criteria, but does not meet the MDE 0.25H, 0.50H, and 0.75H earthquakes so that dynamic analysis is required using the Makdisi-Seed method. Seepage analysis shows that the discharge in the Existing condition is 49,716.74 m³/day exceeding the permit limit of 45,000 m³/day, while Alternative 1 (255.13 m³/day) and Alternative 2 (238.55 m³/day) meet the criteria. Meanwhile, Piping analysis in Normal Water Level conditions shows that the Existing does not meet the Safety Factor, while Alternative 1 and Alternative 2 meet the criteria and are safe for Piping.
Co-Authors Abdul Rochim Ahmad Hidayawan Amariansah, Widayat Antonius Antonius Arafat Suleiman Yero Gatot Rusbintardjo Moch Dony Febriansyah Nur Izzi M. Yusoff Rekhan Farras Sutrisno Riko Bagus Setiyawan