Article Per Year (5 Year)
p-Index From 2021 - 2026
0.817
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 Scripta Technica: Journal of Engineering and Applied Technology
Lisa Fitriyana
Unknown Affiliation
Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Other

Published : 6 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 6 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.
Stabilisasi Tanah Lunak Menggunakan Campuran Ferronickle Slag dan Alkali Soma Shaki Hadi Nugraha; Dzulfikar Sani; Lisa Fitriyana; Juny Andry Sulistyo
Journal of Engineering and Applied Technology Vol 2 No 1 (2026): : June: Scripta Technica: Journal of Engineering and Applied Technology
Publisher : CV SCRIPTA INTELEKTUAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65310/vrm3vy68

Abstract

The Kendal Industrial Park (KIK), Central Java, is characterized by soft clay soil with low bearing capacity, requiring improvement before being used as a construction foundation. This study aims to determine soil classification, analyze the effect of ferronickel slag and alkali (NaOH and KOH) mixtures, and evaluate the potential of these mixtures as soil stabilization materials. The research was conducted experimentally in the laboratory through specific gravity tests, grain size distribution analysis, Atterberg limits, Standard Proctor compaction test, direct shear test, and California Bearing Ratio (CBR) test. The mixture variations used consisted of 10% ferronickel slag combined with alkali solutions of NaOH and KOH at concentrations of 6%, 8%, and 10%. The results showed that the original soil was classified as fine-grained soil with high plasticity and a CBR value of 5.6%, indicating low bearing capacity. The addition of ferronickel slag and alkali reduced soil plasticity and increased soil strength and bearing capacity. Therefore, the mixture of ferronickel slag and alkali has the potential to be used as an environmentally friendly alternative soil stabilization material.  
Perencanaan Ulang Struktur Bawah Gedung dengan Fondasi Tiang Pancang: Studi Kasus Proyek Pembangunan Rumah Susun Pekerja Industri Batang III JTGRSN21-03 Abimanyu Wahyu P.S.P.; Adi Prasetyo Pambudi; Soedarsono, Soedarsono; Lisa Fitriyana
Journal of Engineering and Applied Technology Vol 2 No 1 (2026): : June: Scripta Technica: Journal of Engineering and Applied Technology
Publisher : CV SCRIPTA INTELEKTUAL MANDIRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.65310/715f1x10

Abstract

Pile foundations play an important role in ensuring the stability of multi storey buildings subjected to axial loads, lateral loads, and moments. In the Batang III Industrial Worker Housing Project (JTGRSN21-03), the original foundation system used bored piles. This study redesigns the foundation into spun piles with a diameter of 0.80 m and a length of 12 m under the same soil conditions and loads. The research methodology was conducted through analysis of three foundation joints. Axial bearing capacity was evaluated using the Meyerhof method, resulting in a tip resistance of 946.00 kN, skin friction resistance of 2,970.37 kN, ultimate bearing capacity of 3,916.37 kN, and allowable bearing capacity of 1,305.46 kN. Lateral bearing capacity was analyzed using the Broms method with an allowable capacity of 162.0 kN. Group pile bearing capacity was determined using the Converse Labarre method. Settlement analysis using the Vesic method showed a single pile settlement of 22.69 mm and group settlements of 50.2 mm at joint 599, 41.8 mm at joint 628, and 21.0 mm at joint 371. Plaxis analysis produced smaller settlements of 13.94 mm, 13.44 mm, and 9.19 mm. The pile cap and shear wall design is considered safe.  
Co-Authors Abdul Rochim Abimanyu Wahyu P.S.P. Adi Prasetyo Pambudi Ahmad Hidayawan Amariansah, Widayat Antonius Antonius Arafat Suleiman Yero Dzulfikar Sani Gatot Rusbintardjo Juny Andry Sulistyo Moch Dony Febriansyah Nur Izzi M. Yusoff Rekhan Farras Sutrisno Riko Bagus Setiyawan Soedarsono Soedarsono Soma Shaki Hadi Nugraha