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Latar, Sjafrudin
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Perencanaan Dinding Penahan Tanah pada Ruas Jalan Negeri Wakasihu Kabupaten Maluku Tengah: Retaining Walls Planning on Wakasihu State Road Section, Central Maluku Regency Wusurwut, Sahril Iyan; Betaubun, Renny James; Latar, Sjafrudin
LITERA: Jurnal Ilmiah Mutidisiplin Vol. 1 No. 2 (2024): LITERA: Jurnal Ilmiah Multidisiplin
Publisher : Litera Academica Publishing

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Abstract

JL.Province located in Negeri Wakasihu, Central Maluku Regency is one of the provincial roads affected by landslides due to its location near a fairly high slope/cliff in Negeri Wakasihu, Central Maluku.The landslide disaster occurred due to the influence of bad weather in the form of high intensity rain accompanied by strong winds that hit Negeri Wakasihu, so a solution was needed in the form of planning to build a retaining wall. The method used in the research is by using the theory and empirical formulas according to Rankine regarding active earth pressure and passive earth pressure on retaining walls and the Terzaghi method regarding soil bearing capacity. The planned retaining wall is a gravity type retaining wall with a height (H) = 4 M, bottom width (B) = 2.8 m, top width (T) = 0.6 m, and (Df) = 0.57 m. The safety factor obtained from the calculation results is that the retaining wall is stable against shear forces with a value of 4.67 > 1.5 (Safe) and the wall is stable against overturning forces with a value of 3.35 (SAFE).
Potret Sikap Toleransi Mahasiswa: Studi Kasus di Politeknik Negeri Ambon Nanlohy, Pradythia Aurellai; Abdin, Maslan; Latar, Sjafrudin
Scholars: Jurnal Sosial Humaniora dan Pendidikan Vol. 1 No. 1 (2023): SCHOLARS: Jurnal Sosial Humaniora dan Pendidikan
Publisher : P3M POLITEKNIK NEGERI AMBON

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/js.v1i1.1764

Abstract

Students are able to appear as vanguards in realizing tolerance and harmony in society, students are inseparable parts of society. Intolerance that occurs in society is a trigger that needs to be resolved. As intellectual beings, students are certainly able to sort out problems objectively and critically. It is these advantages that are expected to be able to give hope for unity in Indonesia. The research aims to analyze and provide an overview of the tolerance attitude of Ambon State Polytechnic students. The research method uses descriptive statistical quantitative analysis. The results of the study found that tolerance showed normal or positive data. This was caused by dividing the value of skewness by the error of skewness where the variable Attitude of Tolerance was 0.565/0.302 = 1.87. This value shows normal because it has a position between -2 and +2. reinforced by survey data in the field showing that the average student who is met disagrees with things that support intolerance and are more supportive of tolerance, so they don't choose things that challenge the tolerance valueKeywords: Tolerance, Attitude, Student
Analisis Daya Dukung Tiang Pancang terhadap Pengaruh Review Design Jembatan Wailola Besar Bula, SBT Pratama, Gabriel; Talakua, Elisabeth; Latar, Sjafrudin
VISA: Journal of Vision and Ideas Vol. 4 No. 3 (2024): VISA: Journal of Vision and Ideas
Publisher : IAI Nasional Laa Roiba Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47467/visa.v4i3.5325

Abstract

In the work to replace the Big Wailola Bridge, several problems were encountered, including changes in the height of the planned and actual abutments. The planned abutment height is 7.20 M high and the realized height is 8.80 M. However, the changes (Design Review) do not change the structure of the pile foundation. And also from the boring results at the location it is known that at a depth of 36 M the SPT only shows the number 32, namely clay soil so that the bearing strength of the pile is determined from the frictional resistance between the pile wall and the surrounding soil (Fraction pile).
PERENCANAAN DINDING PENAHAN TANAH UNTUK MENANGGULANGI KELONGSORAN PADA RUAS JALAN HUTUMURI KECAMATAN LEITIMUR SELATAN Soumahu, Valentino; Lewakabessy, Godfried; Latar, Sjafrudin
Journal Agregate Vol. 2 No. 2 (2023): September
Publisher : Jurusan Teknik Sipil

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/ja.v2i2.1509

Abstract

Retaining walls serve the purpose of withstanding lateral pressure from the soil behind them. This construction can be considered as an alternative for addressing potential landslides along the embankment of Hutumuri village road. The aim of this research is to plan a retaining wall as one of the reinforcement alternatives for the embankment along the section of Hutumuri road from Station (STA) 1+200 to 1+270. The planning of the retaining wall along this road section begins with a soil stability analysis using the simple slice method. Subsequently, employing the Terzaghi method, the stability of the wall against soil pressure behind it is analyzed to prevent displacement and potential collapse during the construction of the retaining wall. Utilizing the Simple Slice method and Rankine's theory to assess the slope conditions and the construction of the retaining wall along Hutumuri road section, values for the slope safety factor are obtained. In the unsafe condition, the slope safety factor is less than 1.2, indicating the need for an alternative slope reinforcement, such as a retaining wall. The analysis results for the stability of the Counterfort-type retaining wall indicate that it does not meet the requirements. This is due to the fact that, in section I, the soil bearing capacity safety factor (FS) is 2.454, where the value of FS is less than the recommended value of 3, signaling the need for further consideration and potential adjustments in the design.
ANALISIS DINDING PENAHAN TANAH PADA RUAS JALAN TRANS SERAM DESA LUMOLI KABUPATEN SERAM BAGIAN BARAT Hatulesila, Kezia; Latar, Sjafrudin; Johannes, Standy
Journal Agregate Vol. 3 No. 1 (2024): Maret
Publisher : Jurusan Teknik Sipil

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/ja.v3i1.2113

Abstract

The Trans Seram road section of Lumoli Village, West Seram Regency has a length of 7,150m and a width of 6m starting from STA 0+000 to STA 7+150. Along the road section there are four landslide points, namely at STA 0+350, STA 1+850, STA 2+600 and STA 3+615. Of the four avalanche points, there are three points that have been handled and the remaining one point has not been handled. The avalanche problem at STA 3+615 - STA 3+650 occurs along 35m with a slope height of 6m already covering the road body ± 4.2m remaining 1.8m. This greatly disrupts the activities of road users because it causes narrowing of the road body and temporary avalanche handling using used asphalt dromes. The purpose of this research is to determine the dimensions and stability of retaining walls against shear, overturning and soil bearing capacity on the Lumoli village trans seram road section. The planning of retaining walls on the trans seram road section of Lumoli village uses a cantilever type with a height of no more than 6-7m as a structure to prevent soil collapse by using rankine theory to calculate lateral soil pressure. The results of the dimensions of the cantilever type retaining wall H = 4m, H1 = 3.52m, H2 = 0.48m, Df = 0.8m, H2 = 16m, H22 = 0.23m, A = 0.66, b = 0.3m, C = 1.18m, D = 0.66m, B = 2.8m. And the results of stability against overturning = 3.027 ≥1.5 Safe, stability against shear = 2.910 ≥1.5 Safe and stability against bearing capacity = 809.045 Kn/m2.
PERENCANAAN TEBAL LAPIS PERKERASAN LENTUR RUAS JALAN PENGHUBUNG DESA LAHA – DESA NEGERI LIMA Paul, Rizky Steven; Betaubun, Renny James; Latar, Sjafrudin
Journal Agregate Vol. 3 No. 1 (2024): Maret
Publisher : Jurusan Teknik Sipil

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/ja.v3i1.2135

Abstract

This research aims to plan the thickness of flexible pavement layers on road segments that have not been coated with pavement on the Laha-Negeri Lima road section, Central Maluku Regency. Through primary data collection, namely data obtained in the field including DCP, LHR survey, road dimensions, and documentation. While secondary data is data obtained from agencies, such as Ambon Island road maps, including field observations, interviews, and literature searches, and analysis using the 2017 Road Pavement Design Manual Method. This research determines the appropriate thickness of flexible pavement layers to facilitate inter-regional connectivity and increase local economic potential. The results of the analysis show that the thickness of the asphalt layer is adjusted to the Road Asphalt Plan Manual No.02/M/BM/2017 and the thickness of the flexible pavement layer on the Laha Village - Negeri Lima Village connecting road section along 3000 m is obtained AC WC 4 cm, AC BC 6 cm, AC BASE 7 m, and LFA Class A 30 cm. While the cumulative value of the standard load with a planning length of 3000 m and a width of 6 m is obtained in total 3,252,548 and an average CBR value of 8.17%.
Pengaruh Penambahan Serbuk Bata Merah Terhadap Stabilisasi Tanah Lempung Pada Ruas Jalan Inamosol Kabupaten Seram Bagian Barat Usmany, Elfaldo Falens; Latar, Sjafrudin; Lewakabessy, Ir Godfried
Jurnal Penelitian Multidisiplin Bangsa Vol. 2 No. 7 (2025): Desember
Publisher : Amirul Bangun Bangsa Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59837/jpnmb.v2i6.641

Abstract

Wilayah pegunungan Kecamatan Inamosol, Kabupaten Seram Bagian Barat, Provinsi Maluku dalam kurun waktu beberapa tahun terakhir hidup terisolasi, dikarenakan kondisi infrastruktur jalan diwilayah setempat rusak parah dan sulit dilalui masyarakayat, karena adanya bencana alam seperti curah hujan berlebih hingga menyebabkan longsor, dengan hal tersebut Pemerintah Kabupaten Seram Bagian Barat melakukan perencanaan pekerjaan untuk pembangunan di ruas jalan inamosol. Sebelum dilaksanakan pekerjaan maka dilakukan penelitian untuk mengetahui pengaruh serbuk bata merah terhadap stabilisasi tanah lempung di daerah tersebut yang akan dilakukan dasar pembangunan jalan layak pakai atau tidak. Metode yang digunakan dalam penelitian ini dengan melakukan pemadatan tanah sesuai spesifikasi SNI, berat isi tanah kering 1.394 gr/cm3>15.84% dengan penambahan CBR yang sudah distabilisasikan dengan serbuk bata merah. pengujian kadar air tanah 27,59%. koefisien (Cc) 0.539, tanah kering 1.394 gr/cm3 dan kadar air 15.84%. Pengujian batas cair 3%=49.11%< 27.81% dari batas tanah cair aslinya.  6%=62.50% >13.39 dari nilai batas cair tanah asli dengan bahan tambah serbuk bata merah 3% dan 14.42 < dari batas cair nilai tanah asli. Sedangkan, pada pengujian  9% =43.21 < 9.29 dari nilai batas cair tanah asli dengan bahan tambah serbuk kaca 6% dan 33.21 dari nilai batas cair.
Analisis Penanganan Kelongsoran Lereng Ruas Jalan Leahari-Hukurila Kecamatan Leitimur Selatan Kota Ambon Maitimu, Anthoneta; Thenu, Rivalino Narada; Latar, Sjafrudin
Jurnal Penelitian Multidisiplin Bangsa Vol. 2 No. 7 (2025): Desember
Publisher : Amirul Bangun Bangsa Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59837/jpnmb.v2i6.643

Abstract

Ruas jalan Leahari-Hukurila yang terletak di kota ambon tepatnya di kecamatan leitimur selatan Kota ambon pada STA 00+000-STA 03+850 dengan panjang 3850 meter,ada 2 titik yang kerap mengalami longsor yakni yang pertama pada STA 03+150-STA 03+180 dan titik ang ke dua pada STA 03+750-STA 03+790  karena hujan lokasinya berada di daerah lereng,bukan hanya longsor saja bebatuan besar juga kerap terlepas hingga jatuh di jalan.hal ini menjadi hambatan bagi masyarakat,sebagian masyarakat juga takut untuk melewati kawasan tersebut karena sangat bahaya apabila tiba-tiba terjadinya longsor di daerah lereng. Data primer yaitu sumber data yang langsung memberikan data kepada pengumpul data, cara yang digunakan untuk mengumpulkan data primer adalah interview,p engamatan, observasi, dan dokumentasi. Perhitungan volume longsor sebesar 2,400 m3,dengan peralatan utama yang digunakan adalah excavator dan dump truck. Excavator tersebut mempunyai produktivitas  630 m3/hari untuk 1 unit dan 1,890 m3/hari untuk 3 unit, dengan waktu penyelesaian pekerjaan dalam waktu 2 hari . dump truck tersebut memiliki kapasitas produksi 12,769 m3/jam dengan waktu penyelesaian 6 hari untuk longsor 2,400 m3. Lokasi kedua memiliki voleme kelongsoran 20,400 m3 dan juga  menggunakan  excavator dan dump truck produktivitas excavator tersebut sebesar 653,62 m3 /hari untuk 1 unit, 1.307,24 m3/hari untuk 2 unit , dan waktu penyelesaian pekerjaan selama 16 hari dump truck mempunyai kapasitas produksi 11,857 m3/jam dan menyelesaikan  tugasnya dalam waktu  6 hari selain itu wheel loader di perkenalkan dengan kapasitas produksi 299,82 m3/jam ,menyelesaikan pekerjaan dalam 7 hari untuk tanah longsor seluas 20,400 m3.
DAYA DUKUNG FONDASI TIANG BOR PADA ABUTMEN JEMBATAN WAI RAHWAEN DI PULAU BURU PROVINSI MALUKU Hamkah, Hamkah; Paais, Enjelita; Lewakabessy, Godfried; Huwae, David Daniel Marthin; Latar, Sjafrudin; Kakaly, Sulastri
Jurnal HPJI (Himpunan Pengembangan Jalan Indonesia) Vol. 12 No. 1 (2026)
Publisher : Himpunan Pengembangan Jalan Indonesia (HPJI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26593/4spd2f69

Abstract

Abstract The foundation is the most crucial element of a bridge structure, as it plays a role in supporting the load and transmitting it to the harder soil layers. The Wai Rahwaen Bridge, located on Buru Island, Maluku Province, was built using bored pile foundations, to provide effective bearing capacity for the structure above it. The analysis of the foundation bearing capacity in this study was conducted using a pre- and post-installation approach. This is very important to ensure that the foundation can support the stability of the appropriate abutment load. Before the foundation was installed, the foundation bearing capacity was estimated based on data from 2 points from the Standard Penetration Test and using 2 empirical methods, namely the Reese and Wright Method and the Reese and O'Neill Method. After the foundation was installed, the foundation bearing capacity was determined using data from 4 points from the Pile Driving Analyzer test. The Reese and Wright Method produced an ultimate bearing capacity of 272.5 tons, while the Reese and O'Neill Method produced an ultimate bearing capacity of 309.4 tons. After the foundation was installed, the ultimate bearing capacity determined based on Pile Driving Analyzer test data was 316.2 tons. This study shows that the Reese and Wright Method and the Reese and O'Neill Method produced estimates of the ultimate bearing capacity of a single pile by 13.8% and 2.2%, respectively, when compared to the ultimate bearing capacity obtained using the Pile Driving Analyzer test results. Keywords: foundation; bridge structure; bearing capacity; bored pile foundation; bridge abutment Abstrak Fondasi merupakan elemen paling krusial dari struktur jembatan, karena fondasi berperan menahan beban dan meneruskan beban tersebut ke lapisan tanah yang lebih keras. Jembatan Wai Rahwaen, yang terletak di Pulau Buru, Provinsi Maluku, dibangun dengan menggunakan fondasi tiang bor, untuk memberikan daya dukung yang efektif bagi struktur di atasnya. Analisis daya dukung fondasi pada studi ini dilakukan dengan pendekatan sebelum dan setelah pemasangan fondasi. Hal ini sangat penting untuk dilakukan, untuk memastikan bahwa fondasi itu dapat menopang stabilitas beban abutmen yang sesuai. Sebelum fondasi dipasang, daya dukung fondasi diestimasi berdasarkan data 2 titik hasil uji Standard Penetration Test serta menggunakan 2 metode empiris, yaitu Metode Reese and Wright dan Metode Reese and O’Neill. Setelah fondasi terpasang, daya dukung fondasi ditentukan dengan menggunakan data 4 titik hasil uji Pile Driving Analyzer. Metode Reese and Wright menghasilkan daya dukung ultimit fondasi sebesar 272,5 ton, sedangkan Metode Reese and O’Neill menghasilkan daya dukung ultimit sebesar 309,4 ton. Setelah fondasi terpasang daya dukung ultimit yang ditentukan berdasarkan data uji Pile Driving Analyzer adalah sebesar 316,2 ton. Studi ini menunjukkan bahwa Metode Reese dan Wright serta Metode Reese dan O’Neill menghasilkan nilai estimasi daya dukung ultimate tiang tunggal yang lebih rendah, masing-masing 13,8% dan 2,2%, bila dibandingkan dengan daya dukung ultimate yang dihasilkan dengan menggunakan hasil uji Pile Driving Analyzer Kata-kata kunci: fondasi; struktur jembatan; daya dukung; fondasi tiang bor; abutmen jembatan
Pengaruh Penambahan Cangkang Telur Terhadap Daya Dukung Tanah Lempung Haumahu, Florence; Latar, Sjafrudin; Maitimu, Nexsien R.
Jurnal Teknik Indonesia Vol 7, No 1 (2026): JTI (Jurnal Teknik Indonesia)
Publisher : Universitas Darul Ulum Islamic Centre Sudirman GUPPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61689/jti.v7i1.953

Abstract

This study aims to determine the effect of adding eggshell powder on the bearing capacity of clay soil in Dusun Ahuru, Ambon. Clay soil is know for high plasticity and low bearing capacity. Stabilization was carried out with variations of eggshell powder 5%, 10% and 15% with varying incubation periods of 0, 7, and 14 days. Laboratory test included physica properties and California Bearing Ratio (CBR). Results showed that the addition of 15% eggshell powder with a curing 14 days significantly increased the CBR value from 2,15% (original soil) to 10,42% The calcium carbonate in eggshell powder reacted with clay soil, thereby improving the mechanical properties.
Co-Authors Abdin, Maslan Betaubun, Renny James Gaspersz, Willem hamkah, hamkah Hatulesila, Kezia Hatuwe, Tessa Haumahu, Florence Huwae, David Daniel Marthin Istia, Penina Istia, Penina T Jakob, Juvrianto Chrissunday Johny, Soumokil Hengky Kakaly, Sulastri Lawalata, Alicya Leuwol, Corneles Lewakabessy , Godfried Lewakabessy, Godfried Lewakabessy, Goedfried Lewakabessy, Ir Godfried Lohy, Mastura Maelissa, Nelda Maitimu, Anthoneta Maitimu, Nexsien R. Marasabessy, Husain Muskita, Bill Namarubessy, Chrisnik Nanlohy, Pradythia Aurellai Nara, Tri Nugraha Dominiq Ode, Wirahadi Putra Paais, Enjelita Pattipeiluhu, Gilberth Marcel Paul, Rizky Steven Pesiwarissa, Alfa Cevin Pratama, Gabriel Rudi Serang Siahaya, Vera Th. C. Siahaya, Vera Theresia Caroline Sopacua, Michael Edwin Soumahu, Valentino Standy Johannes Supusepa, Winaefelia Talakua, Elisabeth Talaud, Aprilia Agnes Telehala, Welhemus Wiliyanders Thenu, Rivalino Narada Tuasuun, Fanny Usmany, Elfaldo Falens Wusurwut, Sahril Iyan