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Kebijakan Penilaian Kondisi Perkerasan Lentur Menggunakan Metode PCI dan Analisis Penyebab Kerusakan pada Ruas Jalan Genteng-Temuguruh Kabupaten Banyuwangi Hadiyono, Rama; Nurtjahjaningtyas, Indra; Sutjipto, Jojok Widodo
CAKRAWALA Vol 18, No 1: Juni 2024
Publisher : Badan Penelitian dan Pengembangan Provinsi Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32781/cakrawala.v18i1.558

Abstract

Ruas Jalan Genteng – Temuguruh merupakan Jalan provinsi yang menghubungkan kecamatan Singojuruh dan Sempu menuju kecamatan Genteng Kabupaten Banyuwangi. Sepanjang ruas jalan banyak ditemukan titik kerusakan perkerasan. Kerusakan terjadi pada lapis permukaan yang didominasi pada lajur kanan menuju kota kecamatan Genteng. Data kerusakan jalan dibutuhkan untuk penyusunan indeks kerusakan perkerasan pada metode Pavement Condition Index (PCI). Tujuannya untuk mengetahui kondisi perkerasan jalan dengan cara identifikasi kerusakan, jenis kerusakan dan tingkat kerusakan perkerasan (Shahin,1994). Hasil temuan di lapangan terdapat 7 jenis kerusakan dengan yakni retak pinggir 64,565%, kegemukan 11,874%, pelapukan & butiran 10,852%, retak memanjang & melintang 8,155%, retak buaya 3,272%, retak slip 1,073%, dan lubang sebesar 0,209%. Rata – rata nilai PCI sebesar 78,72 menunjukkan kondisi perkerasan sangat baik, tetapi kondisi riil masih terjadi kerusakan. Hasil analisa penyebab kerusakan jalan diperoleh nilai truk faktor lajur kiri 1,1003 dan lajur kanan 0,7441, untuk nilai TF>1 menunjukkan kerusakan jalan yang disebabkan overloading kendaraan berat.
Korelasi Modulus Elastisitas Light Weight Deflectometer dan California Bearing Ratio Nurtjahjaningtyas, Indra; Putra, Paksitya Purnama; Rasta Darmawan, Raffio
Berkala Forum Studi Transportasi antar Perguruan Tinggi Vol. 2 No. 3 (2024): Berkala Forum Studi Transportasi antar Perguruan Tinggi
Publisher : Prodi Teknik Sipil, Fakultas Teknik, Universitas Jember dan Forum Studi Transportasi antar Perguruan Tinggi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/berkalafstpt.v2i3.1285

Abstract

Road pavement construction requires standard planning and evaluation of the foundation layer's structural strength. The commonly used standard is the California Bearing Ratio (CBR). In situ, road layer CBR value evaluation mainly uses a Dynamic Cone Penetrometer (DCP), Sand Cone, or direct CBR. Using these tools requires a lot of equipment, time, and human resources; therefore, more efficient and practical in situ tests such as Light Weight Deflectometer (LWD) are needed. This research was conducted to find any correlation between the results of the LWD test and the results of Field CBR and DCP testing on pavement road's base course. Data collection was carried out at River Side and Rich Village residential areas. From this research, it can be concluded that there is a significant correlation between the LWD modulus value and the 600 mm CBR DCP and the max CBR DCP conversion modulus, with an average coefficient of correlation 0.96 and 0.958. ABSTRAK Pekerjaan konstruksi perkerasan jalan raya membutuhkan standar dalam perencanaan dan evaluasi kekuatan struktural lapisan pondasinya. Standar yang digunakan yakni nilai California Bearing Ratio (CBR). Evaluasi nilai CBR di lapangan sebagian besar dilakukan menggunakan alat Dynamic Cone Penetrometer (DCP), Sand Cone, atau CBR langsung. Penggunaan beberapa alat ini membutuhkan peralatan, waktu, dan sumber daya manusia yang tidak sedikit, oleh karena itu diperlukan pengukuran lapangan yang lebih efisien dan praktis seperti Light Weight Deflectometer (LWD). Penelitian ini dilakukan untuk melihat bagaimana korelasi hasil pengujian alat LWD pada base course perkerasan jalan dengan pengujian CBR Lapangan dan DCP. Pengambilan data dilakukan di dua tempat yaitu perumahan River Side Bondowoso dan perumahan Rich Village Jember menggunakan ketiga alat. Hasil penelitian menunjukkan bahwa Terdapat korelasi sangat kuat antara nilai modulus LWD uji dengan modulus konversi CBR DCP max dan CBR DCP kedalaman 600 mm. Dengan rerata nilai korelasi berurut 0.958 dan 0.96.
ANALISIS STABILITAS TIMBUNAN PROYEK PEMBANGUNAN JALUR GANDA JALAN KERETA API (KA) SEPANJANG-MOJOKERTO Wulan Anggarita, Ovilia; Putra Purnama, Paksitya; Nurtjahjaningtyas, Indra; Trisno Lestari, Rini
Construction and Material Journal Vol. 6 No. 2 (2024): Construction and Material Journal Vol. 6 No. 2 Oktober 2024
Publisher : Politeknik Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32722/cmj.v6i2.6630

Abstract

The construction of the Sepanjang-Mojokerto railway double track is an initiative to address the growing demand for railway transportation infrastructure. During the building of the double-track railroad, it is anticipated that the rail structure will endure the weight of traversing trains; hence, a stability study for settlement and sliding is essential. The settlement of the embankment between KM 49+500 and KM 49+750 was studied using sondir and borlog correlation data and then a geoslope model to see how stable the embankment was against sliding. The calculated findings indicate a reduction of 0.49 m to 1.49 m. The decrease is unsafe as it is above the permissible limit of 20 cm; achieving a decline to U90% requires around 0.9 years—15 years. Consequently, it is imperative to expedite the reduction using PVD and preloading. The PVD installation employs a triangle configuration with a spacing of 1.5 meters, requiring a duration of 16 to 20 weeks to achieve a 90% reduction. The stability control of the embankment against sliding on the railroad body yielded a safety factor (SF) value ranging from 1.63 to 2.33. SF > 1.5 indicates that the SF value is secure, surpassing the permissible threshold.
Stability Analysis of Replacement Material in Dam Body at Meninting Dam Wildan Faris Alamudi; Indra Nurtjahjaningtyas; Luthfi Amri Wicaksono
Rekayasa Sipil Vol. 19 No. 1 (2025): Rekayasa Sipil Vol. 19 No. 1
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2024.019.01.6

Abstract

Embankment material in dam construction is an important aspect that needs to be considered. The lack of embankment material around the dam is a problem in the Meninting Dam construction project, so it uses materials outside the dam area. With the change in the embankment material used, research is needed on the stability of the dam body. This study aims to determine the characteristics of the replacement material, seepage capacity, uplift force, and slope stability safety factor at the dam. Physical tests are used to determine the physical characteristics of the soil (moisture content, soil specific gravity, rock specific gravity, soil plasticity index filter analysis), while the mechanical test is performed to determine the soil's movement, strength, stiffness, and deformation. This study also uses software assistance, such as Geostudio from Rockscience slide, to calculate a slope's stability level. The results showed that the value of the safety factor obtained on the upstream slope without earthquake is 3.463, the upstream slope with OBE earthquake is 2.057, the upstream slope with MDE earthquake is1.588, the downstream slope without earthquake is 3.117, the downstream slope with OBE earthquake is 2.288, downstream slope with MDE earthquake is 1.898. The value of the safety factor is declared safe because the value obtained is >1.5 conditions without an earthquake and >1.2 conditions with an earthquake. The uplift value on every equipotential is 10.58 t/m2. The value of seepage capacity that comes out downstream of the dam is 4,529 x 10-5 m3- seconds. Seepage capacity is said to be safe because < 0.0127 m3- seconds. The lack of stone material as the main constituent of dam deposits in the research area is the main factor in this study, which focuses on finding the value of the safety factor, lifting force, and seepage capacity of the replacement material for dam deposits. This research will use soil-filling material as a substitute for the Constituent stones, which are very limited in number at the research site.
Soil Improvement and Embankment Stability Using A Combination of Preloading and Prefabricated Vertical Drain (PVD) Fatmawati, Risma Eka; Putra, Paksitya Purnama; Nurtjahjaningtyas, Indra
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 19 No. 1 (2023): May
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v19i1.58658

Abstract

The construction of Double Track Sepanjang-Mojokerto KM 48 + 800 to KM.48 + 950 passes through an area with soft and compressible subgrade soil known from field testing data. After analyzing and calculating the settlement value, high settlement value is obtained for a long period. Efforts to solve the settlement problem in this study are to accelerate the settlement time using the Prefabricated Vertical Drain combined with Preloading. The use of this method aims to accelerate the process of settlement in the soil and increase the value of the soil shear strength (Cu) so that the subgrade becomes more stable also utilizes the pressure from the embankment, which also functions as a load (surcharge) that has been adjusted to traffic and construction loads. PVDs were installed with different patterns and spacing variations in order to calculate the efficiency of installation. Based on consideration of the number and time of PVDs to achieve 90% consolidation, a rectangular installation pattern with a spacing of 1.5 meters was selected, which was installed as thick as compressible soil layer at each point. The PVD calculation used settlement data obtained from the sum of consolidation settlement (SC) and immediate settlement (SI) from variations in the height of the embankment depicted in graphical form, which resulted in a polynomial equation. From this equation, the backfill requirement used to achieve the planned elevation of the embankment after the subgrade was installed with PVDs was obtained. Subgrade backfilling was carried out with a planned embankment height of 9-10 meters. The calculation was continued to find the increase in Cu of the subgrade and then analyzed for stability using the Geoslope program. The results of the final stability analysis after the soil improvement method at the point under review ranged from 1.8 to 1.98 and it was safe.
PEMETAAN ZONA RAWAN LONGSOR BERBASIS ANALISIS STABILITAS LERENG MENGGUNAKAN GIS DI WILAYAH GUMITIR, BANYUWANGI: Landslide susceptibility zone mapping based on slope stability analysis using GIS in Gumitir area, Banyuwangi Amalia, Isna; Hidayah, Prof. Entin; Nurtjahjaningtyas, Indra
Jurnal Teknika Vol 17 No 2 (2025): SEPTEMBER
Publisher : Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/jt.v17i2.1286

Abstract

Longsor di Lereng Gumitir tidak hanya berdampak pada gangguan transportasi, namun juga menimbulkan korban jiwa dan kerugian lingkungan, khususnya di Sungai Kalibaru. Oleh karena itu penelitian ini bertujuan untuk memperkirakan nilai faktor keamanan lereng; sebagai upaya pemantauan longsor. Metode penelitian dengan pemodelan stabilitas lereng dengan menggunakan data berat satuan, kohesi dan sudut geser yang diperoleh dari tabel hasil pengujian laboratorium, selain itu menggunakan data geometri lereng. Aplikasi GeoStudio digunakan dalam proses analisis stabilitas lereng dan geometri lereng diukur menggunakan total station yang kemudian digambarkan menggunakan AutoCAD. Penelitian ini diharapkan dapat memberikan pemahaman yang lebih baik mengenai faktor-faktor yang mempengaruhi tanah longsor serta kerangka kerja yang efektif dalam pemantauan tanah longsor di Lereng Gumitir dan daerah dengan karakteristik serupa lainnya. Hasil analisis kestabilan lereng didominasi oleh nilai faktor keamanan kurang dari 1,2 sehingga atau pada kondisi sangat rentan. Hasil penelitian ini dapat digunakan oleh pemerintah dan masyarakat setempat untuk meningkatkan kesiapsiagaan dan perencanaan mitigasi bencana tanah longsor.
ANALISIS REDESAIN PONDASI ABUTMENT DAN DINDING PENAHAN TANAH JEMBATAN SUNGAI DESA KENDALBULUR KECAMATAN BOYOLANGU KABUPATEN TULUNGAGUNG Rohmawati, Restu Farina; Putra, Paksitya Purnama; Nurtjahjaningtyas, Indra
JURNAL TEKNIK SIPIL Vol 11, No 2 (2022): Volume 11 Nomor 2 November 2022
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jts.v11i2.27216

Abstract

Dinas PUPR Kabupaten Tulungagung merencanakan jembatan sungai Desa Kendalbulur Kecamatan Boyolangu Kabupaten Tulungagung. Berdasarkan hasil evaluasi yang telah dilakukan, daya dukung abutment, dinding penahan tanah 1 (DPT-1), dan dinding penahan tanah 2 (DPT-2) tidak aman sehingga perlu dilakukan redesain. Redesain dilakukan terhadap pondasinya yaitu menggunakan tiang pancang. Dalam meredesain dilakukan perhitungan terhadap daya dukung, tahanan lateral tiang, dan moment tiang. Selanjutnya dilakukan perhitungan stabilitas guling, geser, dan daya dukung akibat redesain tersebut. Hasil redesain diketahui bahwa tiang pancang abutment 1 dan abutment 2 yang sesuai yaitu menggunakan tiang pancang diameter 0,45 m, panjang 17 m berjumlah 16. Redesain ini membuat moment tiang menjadi 392 kN m. Tahanan lateral tiang abutment 1 menjadi 455,82 kN dan abutment 2 449,59 kN. Daya dukung pondasi abutment 1 menjadi 5340,986 kN dan abutment 2 menjadi 5688,315 kN. Redesain DPT-2 menggunakan tiang diameter 0,3 m, panjang 3 m berjumlah 8. Redesain ini membuat safety factor terhadap guling DPT-2 atas menjadi 8,80 dan DPT-2 bawah 6,27. Stabilitas terhadap geser DPT-2 atas menjadi 4,34 dan DPT-2 bawah 2,9. Daya dukung DPT-2 atas memiliki daya dukung sebesar 663,66 kN dengan beban vertikal sebesar 628,950 kN, dan daya dukung pada DPT-2 bawah sebesar 1618,437 kN dengan beban vertikal sebesar 1035,051 kN.
EVALUASI RANCANGAN ABUTMENT JEMBATAN SUNGAI DESA KENDALBULUR KECAMATAN BOYOLANGU KABUPATEN TULUNGAGUNG Rohmawati, Restu Farina; Putra, Paksitya Purnama; Nurtjahjaningtyas, Indra
JURNAL TEKNIK SIPIL Vol 11, No 1 (2022): Volume 11 Nomor 1 Mei 2022
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jts.v11i1.24827

Abstract

Jembatan gantung sungai Desa Kendalbulur mengalami kerusakan sehingga tidak dapat dipergunakan secara optimal. Pada tahun 2018, Dinas PUPR Kabupaten Tulungagung mulai merencanakan jembatan pengganti yang berupa jembatan kantilever dan selesai pada tahun 2021. Perencanaan berupa struktur atas, struktur bawah, dinding penahan tanah 1 (DPT-1) dan dinding penahan tanah 2 (DPT-2). DPT-1 berada di lereng kiri sedangkan DPT-2 berada di lereng kanan. Perencanaan struktur bawah, DPT-1, dan DPT-2 menggunakan data tahun 2018. Namun, pada tahun 2021 geometrik lereng pada sungai tersebut berubah, dan dilakukan penggalian pada kedalaman 3m dari atas lereng. Perubahan geometrik lereng ini berpengaruh terhadap stabilitas abutment dan DPT sehingga perlu dilakukan evaluasi. Sebelum melakukan evaluasi, pertama dilakukan perhitungan stabilitas lereng eksisting dengan menggunakan software geoslope dengan 3 kondisi lereng yaitu kondisi pada tahun 2018, tahun 2021, dan setelah penggalian. Evaluasi abutment dan DPT dilakukan dengan menghitung stabilitas terhadap guling, geser, daya dukung, dan overall pada kondisi setelah penggalian. Hasil perhitungan lereng eksisting menunjukkan bahwa lereng tersebut stabil. Hasil dari evaluasi abutment didapatkan bahwa abutment tidak aman terhadap stabilitas daya dukung pada saat terjadi gempa. Hasil evaluasi DPT-1 didapatkan bahwa DPT-1 aman terhadap guling, geser, dan daya dukung sedangkan DPT-2 tidak aman terhadap daya dukung.
EFFECT OF EARTHQUAKE LOAD ON THE STRUCTURE OF THE HIGHWAY BRIDGE WITH I-GIRDER PRESTRESSED CONCRETE IN THE EVENT OF INACCURACIES IN PRESTRESSING LOSS PREDICTIONS: Pengaruh Beban Gempa pada Struktur Atas Jembatan Jalan Raya Dengan I-Girder Beton Prategang Apabila Terjadi Ketidaktepatan Prediksi Kehilangan Prategang Priyono, Pujo; Nurtjahjaningtyas, Indra
Jurnal Rekayasa Sipil dan Lingkungan Vol. 2 No. 02 (2018): JURNAL REKAYASA SIPIL DAN LINGKUNGAN
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (257.569 KB) | DOI: 10.19184/jrsl.v2i02.8016

Abstract

In planning a highway bridge girder using prestressed concrete, it must pay attention to two design categories, namely strength and service. Problems have arisen since the existence of earthquake resistance regulations for road bridges, so planners must calculate the amount of deflection and stress that occurs in the upper structure due to earthquake loads, which must be smaller than the deflection and voltage permits required by regulations. All of that was also greatly influenced by the accuracy of the predicted loss losses for prestressed concrete girders. The purpose of this study was to conduct a study which could be a solution for how to actually treat a good design, for the I-Girder design of prestressed concrete used as a highway bridge girder in the event of inaccurate prediction of loss of pressure during an earthquake, resulting in two design categories strength and service ability can be considered all well. The methodology of this study is to make as a starting point the prestressed concrete I girder whose dimensions are capable of being a highway bridge girder with a span of 30 m to 40 meters with standard loading for loading BM 100. For span bridges that have 100% prediction accuracy, use as a basic benchmark of deflection and stress values that occur for the type of combination of loads that have earthquake loads, then with the same span, varied values of inaccurate predictions lose pre-stress and analyzed deflection and stress values that occur for types of load combinations that have earthquake loads varied earthquake regions 1,2, 3 and 4, for medium soil types. The results of the study show that the greater the percentage of inaccurate prediction of loss of pressure, the greater the deviation ratio of deviations both deflection, upper fiber stress and lower fiber stress occur in the field. Which, if the prediction of losing pre-pressures is smaller than the actual one, then the level of the deviation ratio of the allowable deviation increases as well as vice versa. Also, predicting pre-suppression voltage loss that is located on the side greater than the actual loss of pressure that occurs will be on the part of the party that is harmful to the ability of service and the permissible power, when an earthquake occurs.
ANALISIS VARIASI DIAMETER TIANG PANCANG PADA PERANCANGAN PONDASI RUMAH SUSUN Septiandri, Rohmahillah Aviskanasya; Arti, Farikha Mualida Nafi; Nurtjahjaningtyas, Indra; Putra, Paksitya Purnama; Prasetyo, Slamet Rohadi Budi
Jurnal Teknik Sipil : Rancang Bangun Vol. 11 No. 02 (2025): Oktober 2025
Publisher : Universitas Muhammadiyah Sorong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33506/rb.v11i02.4121

Abstract

Perencanaan pondasi tiang dapat dikatakan baik dengan syarat tidak mengalami kegagalan struktur serta mampu memikul beban dengan aman. Maka dari itu dalam perencanaan struktur pondasi memerlukan analisis dan perhitungan yang baik agar diperoleh perencanaan yang aman dan efisien. Pada penelitian ini dilakukan analisis daya dukung pondasi pada variasi diameter dan kedalaman dengan membandingkan perhitungan secara analitis dan numeris. Secara analitis menggunakan metode empiris Luciano De Court (1995) dan Mayerhoff (1976) berdasarkan data uji SPT, sedangkan perhitungan numeris menggunakan metode elemen hingga program Plaxis 2D V.8. Dari hasil perhitungan secara manual dan program terdapat perbedaan yang signifikan dari 4 pemodelan. Didapatkan nilai keamanan menggunakan program Plaxis 2D pada model 1 sebesar 2,9637, model 2 sebesar 2,8303, model 3 sebesar 3,1516, dan model 4 sebesar 3,2181. Perhitungan daya dukung menggunakan cara analitis didapatkan hasil pada model 1, 2, 3 dan 4 berturut-turut sebesar 430,4658 ton, 513,2086 ton, 576,6819 ton dan 678,1103 ton. Secara keseluruhan nilai keamanan (SF) yang diperoleh memenuhi untuk semua desain rencana, begitupun dengan nilai Qijin yang dihasilkan aman terhadap beban yang diterima serta penurunan elastis desain perencanaan telah memenuhi syarat penuruan maksimal (Sijin) pada tanah lempung yaitu ≤ 0,065.