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Analisa Perbandingan Penurunan Awal Bendungan Tipe Material Timbunan Urugan Batu dan Urugan Tanah (Studi Kasus Bendungan Digoel-Papua): Comparative Analysis of the Initial Decline of Dam Material Type of Stone Urugan Embankment and Soil Urugan (Digoel Dam-Papua Case Study) Erlangga, Erlangga; Sadono, Kresno Wikan; Putranto, Thomas Triadi
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 12 No 1 (2024): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil (Januari 2024)
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v12i1.7876

Abstract

To create prosperity for the people of Papua Province. The government has made one of the programs, namely the construction of the Digoel Dam in Boven Digoel Regency – Papua. The successful construction and operation of a dam requires a comprehensive evaluation of the design prior to commencement of the construction process. This study aims to analyze the initial settlement that occurred in the Digoel dam type earth fill and rock fill. Initial settlement analysis was carried out using the modulus parameter obtained from the literature. SIGMA/W software has been used to estimate dam crest settlement due to static loading. From the results of the analysis of the initial settlement of the dam with the rock fill and earth fill types, it is accepted that the maximum permissible settlement is 1.59%.
Slope Stability Analysis of the Bener Dam Cofferdam Using PLAXIS Application for Main Dam Construction Safety Halim, Ferdiansyah Imran; Wardani, Sri Prabandiyani R; Sadono, Kresno Wikan
TEKNIK Vol 46, No 2 (2025) April 2025
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v46i2.68004

Abstract

Slope stability is one of the methods used to determine the safety factor of a hydraulic structure, such as a cofferdam. A cofferdam functions to retain water and divert it into a diversion channel, which may be in the form of a conduit or tunnel. Assessing the safety factor of a cofferdam is crucial to ensuring the smooth progress of dam body embankment work. While many studies have been conducted on dam body slope stability, research on cofferdam slope stability remains limited. This study aims to analyze the slope stability of the Bener Dam cofferdam using the finite element method with the PLAXIS application to ensure that the main dam construction remains unaffected. The data used for slope stability analysis were obtained from the Final Report of Bener Dam and several literature sources. The slope stability modeling was evaluated under three conditions: after construction (empty water level), flood water level, and rapid drawdown. The results indicate that the safety factor values for all three conditions exceed the required threshold, with values of 1.369 for after construction, 1.824 for normal water level, and 1.215 for flood water level. These results confirm that the main dam construction is not affected by the stability of the cofferdam.
Vertical Deformation of Manikin Asphalt Concrete Core Dam Using Mohr-Coulomb and Hardening Soil Material Models with Plaxis 2D Software Gewangga, Arya Bakti; Sadono, Kresno Wikan
TEKNIK Vol 46, No 2 (2025) April 2025
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v46i2.67680

Abstract

EVALUASI PENGARUH TIMBUNAN DAN STOCKYARD PANCANG TERHADAP KEGAGALAN PANCANG (STUDI KASUS: PROYEK JEMBATAN X DI KALIMANTAN) Matheus, Patrick; Hartono, Darwin; Sukamta, Sukamta; Sadono, Kresno Wikan
Rang Teknik Journal Vol 8, No 2 (2025): Vol. 8 No. 2 Juni 2025
Publisher : Fakultas Teknik Universitas Muhammadiyah Sumatera Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31869/rtj.v8i2.6722

Abstract

One of the bridge projects in Kalimantan is built on soft soil. Soft soil has poor bearing capacity, low shear strength and permeability, and high compressibility. One of the substructures of the bridge project, consisting of two spun pile points, experienced failure (exceeding the allowable inclination, indications of breakage at a depth of -8,000 mm, and failure to achieve the planned bearing capacity). The failure occurred after excavation for the pile cap was carried out.The additional load from preloading embankments and a spun pile stockyard, located 20,000 mm and 15,000 mm away, caused lateral deformation in the existing soil. This lateral deformation influenced additional deformation and bending moments in the failed spun piles. An evaluation of the additional load on the spun piles was conducted using the Finite Element Method with Plaxis 2D software. The additional load from the preloading embankments and stockyard was analyzed to determine its impact on the spun piles.The analysis showed that the additional load from the preloading embankments and stockyard caused lateral deformation, leading to deformation and bending moments in the spun piles. However, this additional load alone was not sufficient to cause failure in the spun piles.
Pendampingan Analisis Geoteknik Penanganan Lereng Pondok Pesantren Al Fitrah Metesah Tembalang Semarang Sadono, Kresno Wikan; Sari, Undayani Cita; Indrastono, Indrastono; Partono, Windu; Prastiwi, Yulita Arni; Pardoyo, Bambang
Darma Sabha Cendekia Vol 7 No 1 (2025): Darma Sabha Cendekia: Juni 2025
Publisher : Jurusan Ilmu Ekonomi dan Studi Pembangunan | Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32424/dsc.v7i1.6326

Abstract

Pada suatu pembangunan konstruksi diperlukan survey awal geoteknik sebagai penyelidikan geoteknik awal. Dengan adanya kegiatan ini maka permasalahan pembangunan dapat diketahui secara rill dilapangan. Pondok Pesantren (PP) Al-Fitrah merencanakan akan mendirikan bangunan baru berupa asrama santri. Bangunan ini direncanakan berada di Kecamatan Tembalang, Semarang. Oleh karena itu diperlukan survey awal dan penyelidikan geoteknik pada lokasi yang akan didirikannya bangunan baru berupa asrama santri Pondok Pesantren (PP) Al-Fitrah tersebut. Rencana bangunan asrama santri berada di atas lereng, sehingga perlu analisa terhadap longsoran. Penyelidikan geoteknik yang diperlukan adalah boring manual dan sondir (CPT) manual. Berdasarkan data pengujian tersebut, kemudian dapat dianalisis dan dievalusi kemudian diberikan rekomendasi dan saran yang sesuai untuk mendukung kelancaran pembangunan asrama santri baru Pondok Pesantren (PP) Al-Fitrah. Berdasarkan hal tersebut maka Tim Pengabdian kepada Masyarakat Departemen Teknik Sipil Universitas Diponegoro melaksanakan pengabdian masyarakat dalam bentuk evaluasi lokasi lahan rencana pembangunan asrama santri Pondok Pesantren (PP) Al-Fitrah. Dengan kegiatan ini diharapkan dapat memberikan saran dan masukan bagi pihak Yayasan Pondok Pesantren (PP) Al-Fitrah terhadap rencana pembangunannya