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All Journal Journal of Degraded and Mining Lands Management Jurnal Teknik Sipil Journal of Geoscience, Engineering, Environment, and Technology Civil Engineering Journal SIKLUS: Jurnal Teknik Sipil Jurnal Aplikasi Teknik Sipil Jurnal Rekayasa Sipil Astonjadro Jurnal Pensil : Pendidikan Teknik Sipil APTEK IGKOJEI: Jurnal Pengabdian Masyarakat Matriks Teknik Sipil Journal of Infrastructure and Civil Engineering SAINSTEK J-ABDIPAMAS (Jurnal Pengabdian Kepada Masyarakat) Jurnal Teknologi & Rekayasa Sipil SLUMP TeS : Jurnal Teknik Sipil Jurnal Bangunan: Konstruksi & Desain Jurnal Jalan Jembatan Journal of Infrastructure and Construction Technology
Satibi, Syawal
Universitas Riau
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mechanical Engineering Physics Social Sciences Transportation Veterinary Other

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Analysis of the Capability of Pile Assembly Foundations in Soft Soil in Physical Modeling of Variationsiin Laboratory Scale Distances Rahman, Arief; Fatnanta, Ferry; Satibi, Syawal
ASTONJADRO Vol. 12 No. 1 (2023): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v12i1.8139

Abstract

The capacity of raft foundations, pile foundations and pile rafts on soft soil with variations in the distance between the piles. Perform analysis of the carrying capacity and settlement of each foundation test and then compare the results of the theoretical carrying capacity research with the analysis of carrying capacity calculations. The implementation of the test prepares the test along with samples of the raft foundation, pile foundation and pile raft foundation. The test were carried out using a gradual load then a dial gauge is placed at both ends of the sample raft and the load reading is taken. The pile foundation was tested with a decrease of 10 cm while the settlement on the raft foundation and the pile raft foundation was 3 cm, the carrying capacity of the raft foundation was 24 kg, the pile foundation varied 4D distances; 6D and 8D, namely 7.5 kg and the foundation of the pile raft with variations in 4D distance; 6D and 8D are 26 ; 32 and 32 kg. In the interpretation method, the pile raft foundation with various distances increased from 4D to 6D but decreased in 8D. Pile raft foundations with various distances between pile have not a significant effect where raft foundations are more dominant in supporting resistance than pile foundations.
Keandalan Ketebalan Konstruksi Terhadap Masa Layanan Berdasarkan Fatigue dan Lendutan Pada Kasus Jalan BTS Kampar - BTS Kota Bangkinang Jufri, Afdirman; Sentosa, Leo; Yusa, Muhamad; Muhardi; Wibisono, Gunawan; Satibi, Syawal
SLUMP TeS : Jurnal Teknik Sipil Vol. 4 No. 1 (2025): SLUMP TeS : Jurnal Teknik Sipil
Publisher : Sekolah Tinggi Teknologi Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52072/slumptes.v4i1.1414

Abstract

Ketebalan konstruksi perkerasan merupakan elemen krusial dalam menjamin masa layanan jalan yang andal di bawah pengaruh beban lalu lintas berulang dan kondisi lingkungan yang dinamis. Penelitian ini bertujuan untuk mengevaluasi keandalan ketebalan perkerasan berdasarkan analisis kelelahan (fatigue) dan deformasi permanen dengan mengacu pada metode AASHTO 1993 dan Manual Desain Perkerasan (MDP) 2024. Lokasi kajian berada pada ruas jalan BTS Kampar – BTS Kota Bangkinang yang mengalami peningkatan volume kendaraan secara signifikan. Analisis dilakukan melalui pemodelan numerik menggunakan perangkat lunak KENPAVE dengan mempertimbangkan variasi faktor kerusakan kendaraan (Vehicle Damage Factor/VDF) dan tingkat pertumbuhan lalu lintas sebesar 4,83% hingga 10%. Hasil menunjukkan bahwa ketebalan konstruksi yang dirancang dengan memperhatikan kondisi lalu lintas aktual menghasilkan masa layanan yang lebih optimal. Kombinasi asumsi VDF faktual 10 tahun memberikan masa layan lebih panjang dibandingkan skenario dengan kombinasi VDF faktual 2 tahun dan normal 8 tahun. Temuan ini diharapkan dapat menjadi acuan dalam perencanaan struktur perkerasan yang lebih andal dan berkelanjutan.
Analisis Karakteristik Parkir dan Pemodelan Kebutuhan Parkir di Fakultas Teknik Universitas Riau Leo Sentosa; Khairul Amri; Mardani Sebayang; Ismeddiyanto; Iskandar Romey Sitompul; Syawal Satibi
Jurnal Teknologi dan Rekayasa Sipil Vol. 4 No. 1 (2025): VOL 4 NO 1 (JULY 2025)
Publisher : Departemen Teknik Sipil, Fakultas Teknik Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/jtrs.4.1.19-24

Abstract

Fakultas Teknik Universitas Riau sebagai pusat pendidikan tentunya telah menyediakan fasilitas parkir untuk para civitas akademika. FT-UNRI mengalami peningkatan jumlah civitas akademika yang dimulai sejak adanya penambahan jurusan dan prodi baru. Peningkatan jumlah tersebut menyebabkan fasilitas parkir yang ada tidak memadai, hal ini dibuktikan dengan terdapat masalah pada fasilitas parkir yang tersedia seperti kendaraan yang parkir di luar petak parkir yang tersedia dan kendaraan yang parkir tidak tertata. Penelitian ini bertujuan untuk melihat karakteristik lahan parkir yang tersedia untuk nantinya dapat dilakukan upaya optimasi serta mendapatkan pemodelan untuk menghitung kebutuhan parkir sepeda motor dan kendaraan roda empat di FT-UNRI. Hasil analisis karakteristik parkir mobil terdapat indeks parkir sebesar 130,59% hal ini menunjukkan bahwa kebutuhan parkir melebihi kapasitas normal, untuk sepeda motor indeks parkir maksimum sebesar 78,94% hal ini menunjukkan bahwa fasilitas parkir memadai, namun kenyataan dilapangan masih terdapatnya kendaraan yang parkir di luar tempat yang disediakan. Model kebutuhan parkir sepeda motor adalah Y1 = -29,730 + 0,593 X1 + 6,129 X8 dan untuk parkir mobil adalah Y2 = -9,128 + 0,068 X4 + 0,422 X8. Kebutuhan parkir tahun 2022 untuk sepeda motor sebanyak 2441 SRP (Satuan Ruang Parkir) dan untuk mobil adalah sebanyak 128 SRP.
Pengaruh Spasi dan Panjang pada Kelompok Tiang Terbuka di Pasir: Studi Model Kelompok Tiang dan Fondasi Blok Agus Nugroho, Soewignjo; Satibi, Syawal; Putra, Andius Dasa; Andriani, Andriani
Journal of Infrastructure and Construction Technology Vol. 1 No. 2 (2023): July 2023
Publisher : Dept. of Civil Engineering Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56208/jictech.1.2.45-51

Abstract

Planning for existing construction requires taking into consideration the exact location of the structure; sandy soil is typically found in Indonesia, and pile foundations are a very frequently used type of support. Whenever the stable soil is located at a quite deep depth or when the building's foundation is situated on a relatively high embankment, the pile foundation is utilized to support the structure. Given the quantity of pile foundations utilized in Riau, where soft soil makes up the majority of the soil type, a study on pile foundations is necessary. A possible research approach involves conducting a small-scale pile foundation modeling experiment to determine the group pile's bearing capacity on sand soil, taking into account variations in the pile's length and space. Direct testing on a pile foundation model with length, spacing, and length variations of 20, 30, and 40 cm as well as spacing variations of 2.5D, D, and 5D was used for the research. Pile group length 40 cm has the highest capacity, according to the results of a direct loading test conducted with a spacing of 2.5D. According to the findings of the Terzaghi and Peck method interpretation, the pile with a length of 40cm and 2.5D spaces has the largest qult of 1.665 kN. A pile with a length of 40cm and 2.5D pile spacing is the pile with the largest qult of 2.232 kN, followed by a pile with a length of 30cm and a space of 2.5D. Based on the results of the investigation, it can be stated that Qult will get higher the more closely spaced the pile exists and that Qult will become higher the longer the pile is on the foundation model.
Evaluation of Particle Grain Size of Sand Embankment for Liquefaction Above Peat Against Vibration Agus Nugroho, Soewignjo; Yusa, Muhamad; Putra, Agus Ika; Satibi, Syawal; Fatnanta, Ferry; Wibisono, Gunawan; Rinaldi, Rinaldi; Hasibuan, Putra S
Journal of Infrastructure and Construction Technology Vol. 3 No. 1 (2025): January 2025
Publisher : Dept. of Civil Engineering Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56208/jictech.3.1.1-8

Abstract

Liquefaction is the transformation of soil into a liquid. The vibrating table in this study moves in a horizontal direction and the opposite manner in a vertical direction utilizing modelling. Acceleration variations of 0.25 g and 0.32 g were employed. The dirt was 10 centimetres thick. The sand clusters were 15 cm thick, with differences in debris gradient size and water surface on the sample. The uniform load that was employed was 40 kg/m2. Examine the drop of the ground surface and the rising of the porous water for signs of liquefaction. A 0.5mm diameter glass pipe was used to measure the porous water pressure. The test findings revealed that with higher acceleration, effective vertical voltage, and porous water ratio values, the rate of particle graduation has a major influence on the occurrence of liquefaction potential. The test results revealed that poorly graduated fine sand experienced maximum effective vertical stress and elevated porous water ratio values (Ru), whereas well-graded sand tended to be more stable.
Pendampingan Pada Aparat dan UMKM Desa untuk Peningkatan Ekonomi Simpang Petai-Kampar Putra, Agus Ika; Yuniarto, Enno; Siswanto, S.; Nugroho, Soewignjo Agus; Satibi, Syawal; Khairat, K; Herman, Syamsu; Saeri, Muhammad; Adnan, Arisman
J-ABDIPAMAS (Jurnal Pengabdian Kepada Masyarakat) Vol. 8 No. 1 (2024): April 2024
Publisher : IKIP PGRI Bojonegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30734/j-abdipamas.v8i1.2812

Abstract

Simpang Petai village was formed due to the expansion of the village in 2008.  As a new village, Simpang Petai lacks facilities to face the challenges of implementing village development. The level of understanding and skills of the village officials for planning system is still very low.  The participation of UMKM in the implementation of village development needs to be carried out and strengthened as one of the bases of village stability and the driving force for improving the village economy.  The PkM Team of the Riau University Village Development Program, as Technical Assistance, helped solve village problems.  Inventarisasi PkM team, compile activities systematically and continuously, to improve the understanding and skills of officials and village communities in the process of preparing and implementing participatory village development planning. The forming of active participation of young people, as drivers of village UMKM, in development as the basis for the resilience of rural communities and the driving force of the village economy.  The activities of Advanced Welding Skills Practice, which with Product orientation, and Management Activities website Desa as the basis for village planning for Community Services and Marketing of Local Products succeeded in improving the economy of UMKM ABSTRAKDesa Simpang Petai terbentuk karena pemekaran desa tahun 2008. Sebagai desa baru, Simpang Petai minim fasilitas menghadapi tantangan melaksanakan pembangunan desa. Tingkat pemahaman dan keterampilan Aparat desa menyusun sistem perencanaan desa masih sangat rendah. Partisipasi UMKM dalam pelaksanaan pembangunan desa perlu dijalankan serta diperkuat sebagai salah satu basis stabilitas desa dan motor penggerak peningkatan Perekonomian desa. Tim Kegiatan Pengabdian Masyarakat Program Bina Desa Universitas Riau, sebagai Technical Assistance, membantu menyelesaikan permasalahan desa. Inventarisasi tim PkM, menyusun kegiatan secara sistematis dan berkesinambungan, yaitu untuk meningkatkan pemahaman dan keterampilan Aparat dan masyarakat desa pada proses penyusunan dan implementasi perencanaan pembangunan desa yang partisipatif. Terbentuknya partisipasi aktif para pemuda, sebagai penggerak UMKM desa, dalam pembangunan sebagai basis ketahanan masyarakat desa dan motor penggerak Perekonomian desa. Kegiatan Praktik Keterampilan Pengelasan Lanjut, yang dengan orientasi Produk, dan Kegiatan Pengelolaan website Desa sebagai basis perencanaan desa untuk Pelayanan Masyarakat dan Pemasaran Produk Lokal berhasil meningkatkan ekonomi UMKM.
Stabilisasi Tanah Gambut Dengan Geopolimer Hibrid Abu Terbang Dan Pasir Wibisono, Gunawan; Azizi, Wildan; Putra, Agus Ika; Satibi, Syawal; Olivia, Monita
Jurnal Bangunan, Konstruksi & Desain Vol 3 No 4 (2025): Desember 2025
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jbkd.3.4.182-194.2025

Abstract

Peat soil has high water content and compression, and low bearing capacity. Peat soil stabilization is carried out to increase the bearing capacity, increase the density and strength of the soil. Geopolymer material is one of the materials for soil stabilization derived from basic materials activated with activator solutions such as sodium hydroxide and sodium silicate. This study aims to examine the unconfined compressive strength, average water content, and dry density of peat soil stabilized with a hybrid geopolymer mixture of fly ash and sand. The parameters studied were NaOH molarity of 10M, 12M, and 14M, and silicate modulus (Na2SiO3/NaOH ratio) of 1.5; 2.0; and 2.5. The results of the study showed that the highest unconfined compressive strength was obtained for a mixture with a silicate modulus of 2.5 (GP-12M-Ms2.5), which was 23.68 kPa at 28 days. Unconfined Compressive Strength (UCS) testing was conducted after the samples were cured for 7, 28, and 56 days. The unconfined compressive strength of the GP-14M-Ms2 mixture with a molarity of 14M was 23.68 kPa at 28 days. This is due to the geopolymerization reaction that releases OH- ions to dissolve silica and alumina in fly ash, and the silicate modulus (Ms) can increase the pH of the geopolymerization and bind soil particles better. The highest dry soil content was produced by the GP-12M-Ms2.5 mixture for 7, 28, and 56 days. Sand used in peat soil stabilization can help increase density because it can fill soil cavities.
Predictive model for California Bearing Ratio (CBR) in expansive coastal subgrades: a rapid geotechnical assessment for degraded and marginal lowland areas Nugroho, Soewignjo Agus; Satibi, Syawal; Putra, Agus Ika; Zulkifli, Zulkifli; Sutikno, Sigit; Yusa, Muhamad; Rinaldi, Rinaldi; Yamamoto, Koichi
Journal of Degraded and Mining Lands Management Vol. 13 No. 1 (2026)
Publisher : Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15243/jdmlm.2026.131.9329

Abstract

In geotechnical engineering, professional actions and expert judgment are often essential in soil investigation methods. In lowland and coastal areas, expansive, fine-grained soils and sandy sedimentation lead to reduced bearing capacity, posing significant challenges for sustainable infrastructure development on marginal and degraded lands. Such conditions are prevalent in post-mining or naturally poor coastal environments, necessitating cost-effective and rapid assessment tools. This study modeled a clayey sand mixture using bentonite and kaolin as fine fractions, which exhibit expansive behavior and poor gradation, simulating worst-case geotechnically degraded subgrades. The mechanical behavior of the soil was evaluated through modified compaction, using the CBR test and CPT test as bearing capacity parameters. Soil mixtures were simulated with sand fractions ?65% and bentonite-kaolin compositions with ?50% bentonite. Compaction was modeled using variations in energy compaction and water content under conditions below the maximum dry density. CBR prediction was conducted using Qc as the primary predictor and dry density as a supporting predictor. A hybrid stepwise regression analysis in the         Z-score scale identified positively correlated predictors: +3.00 (Qc), +0.55 (?dry), and +1.28 (Qc ?dry interaction). The regression model showed strong statistical performance with R² = 0.84 and high significance with the lowest p-values. The resulting regression equation offers an applicable approach to rapidly evaluate the bearing capacity of subgrade soils in degraded coastal or marginal conditions, thereby facilitating geotechnical engineering design and initial site assessment crucial for land management and rehabilitation actions.
Numerical Analysis of The Effect of Creep on The Settlement and Failure Pattern of Helical Piles Foundations Satibi, Syawal; Fatnanta, Ferry; Aprillia. H.R., Bella
ASTONJADRO Vol. 14 No. 4 (2025): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v14i4.19152

Abstract

Peat soil is a unique type of soft soil that has a low bearing capacity and experiences significant creep effect. This inherent challenge necessitates effective improvement methods to enhance its stability, among which helical pile foundations stand out as a viable solution. Despite their promising application, the nuances of how creep influences the performance of these helical piles in peat soil remain largely unexplored. This study aims to analyse the effect of creep on the settlement and failure pattern of helical pile foundations in peat soils. Axis-symmetric two-dimensional numerical analyses using the finite element method were carried out to model helical piles foundations with varying creep indices (Cα) and differing spacings between the helical plates (1D and 3,5D). The results showed that the effect of creep caused the settlement of helical piles to increase as the value of Cα increases. However, the changes of excess pore water pressure around the helical pile foundation were not significantly affected by the variation of Cα value. In addition, the failure patterns of helical piles foundations were not affected by the creep effect, with the failure mechanism still following the cylindrical shear pattern for the 1D inter-plate spacing and the individual bearing pattern for the 3,5D inter-plate spacing. This study provides insight into the importance of considering the effect of creep in the design of helical piles foundations in peat soils for long term use.
PENGARUH PASIR, ABU TERBANG, DAN AIR PADA KARAKTERISTIK MEKANIS TANAH LEMPUNG Nugroho, Soewignjo Agus; Fatnanta, Ferry; Satibi, Syawal; Yusa, Muhamad; Putra, Agus Ika; Wibisono, Gunawan
Matriks Teknik Sipil Vol 13, No 1 (2025): Juni
Publisher : Program Studi Teknik Sipil FT UNS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/mateksi.v13i1.101745

Abstract

The shear strength and bearing capacity of soil are influenced by its type, mineral composition, and particle size. Both cohesion and the friction angle play significant roles in determining soil strength, while density is crucial for supporting forces. This study examines the effects of grain size, soil minerals, and water content on the shear strength and bearing capacity of soil. Various tests such as California Bearing Ratio, Direct Shear, and Unconfined Compression Test are conducted on sand and clay, compacted with different numbers of strikes and water contents. The study also explores the impact of organic soil and fly ash on shear strength. Additionally, immersion tests are performed to assess how water absorption affects the soil’s properties. Results show that compression at the optimum moisture content (OMC) produces the highest strength, while compression at higher moisture levels results in greater strength loss compared to drier conditions. At a constant water content, increased soil density leads to higher bearing capacity. Conversely, excess water content reduces the soil's strength. The presence of clay, fly ash, and organic material increases water absorption capacity. In sandy soils, the distribution of grain size significantly influences shear behavior. The addition of clay enhances both the friction angle and soil cohesion, while higher fly ash content tends to reduce the friction angle and improve soil cohesion. Interestingly, cohesion appears to be unaffected by the sand's gradation.  Keywords: bearing capacity, clay, fly ash, shear strength, sand.
Co-Authors A. S. Muntohar Adi, Sapria Agus Ika Putra Agus Ika Putra Agus Nugroho, Soewignjo Andius Dasa Putra Andriani Andriani Aprillia. H.R., Bella Ari Sandhyavitri Arief Rahman Arisman Adnan Azizi, Wildan Enno Yuniarto Febrizal Ujang Ferry Fatnanta Gunawan Wibisono Gunawan Wibisono Hasibuan, Putra S HR, Bella Aprilia Imam Suprayogi Iskandar Romey Sitompul Ismeddyanto, Ismeddiyanto Jufri, Afdirman K Khairat Khairat, K Khairul Amri Koichi Yamamoto, Koichi Lala Monang Robert Christian Zega Leo Sentosa Leo Sentosa M. Yusa Mardani Sebayang Mohammad Saeri Monita Olivia Muhamad Yusa Muhammad Saeri, Muhammad Muhammad Yusa Muhammad Yusa Muhardi Nugroho, Soewignjo A. Raflyatullah Raflyatullah Raflyatullah, Raflyatullah Rinaldi Rinaldi Ropiska Alfareza Rosma, Iswadi Hasyim S. Siswanto S. Siswanto Saputra, Riola Sihaloho, Dodi Seprades Soewignjo Agus Nugroho Soewignjo Agus Nugroho Subhan Pytar Wijaya Suratman Suratman Sutikno, Sigit Syamsu Herman Syamsu Herman Tiara Mahardika Wardani, S. P. Retno Yarvis Syahwaner Yusuf Agustamar Zega, Christian Robert Zega, Lala Monang Robert Christian Zulkifli Zulkifli