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ANALISIS DAYA DUKUNG PONDASI DANGKAL PADA TANAH LUNAK DI DAERAH DENGAN MUKA AIR TANAH DANGKAL (STUDI KASUS PADA DAERAH SUWUNG KAUH) I Gusti Ngurah Putu Dharmayasa
PADURAKSA: Jurnal Teknik Sipil Universitas Warmadewa Vol. 3 No. 2 (2014)
Publisher : Program Studi Teknik Sipil, Fakultas Teknik dan Perencanaan, Universitas Warmadewa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (719.223 KB) | DOI: 10.22225/pd.3.2.261.22-44

Abstract

Perencanaan pondasi perlu diperhatikan dalam perencanaan bangunan agar tercapai suatu kestabilan dan keamanan. Dalam perencanaan pondasi dipengaruhi oleh banyak faktor, diantaranya kondisi tanah. Dengan kondisi tanah yang berbeda dalam hal ini kedalaman yang berbeda dan dengan adanya muka air tanah yang dangkal mempengaruhi perencanaan pondasi. Seperti halnya tanah di daerah Suwung yang berdaya dukung rendah dengan muka air tanah yang cukup dangkal, sehingga perlu diketahui tipe pondasi dangkal yang dapat memenuhi syarat untuk kondisi tanah di Suwung. Untuk mengetahui karakteristik tanah dilakukan dengan pengujian di laboratorium yaitu pegujian sifat fisik dan mekanik. Pengujian sifat fisik tanah yaitu pengujian kadar air (Wc), berat jenis (Gs), batas-batas Aterberg dan berat volume tanah (γ). Pegujian mekanik dengan tes triaksial UU. Berdasarkan tes triaksial UU yang dilakukan di laboratorium diperoleh daya dukung tanah (qu), nilai kohesi (c), dengan sudut geser (Ø) untuk tanah yang terletak di atas muka air tanah yaitu tanah pada kedalaman 1 meter dan tanah yang terletak di bawah muka air tanah yaitu tanah pada kedalaman 2 dan 4 meter. Dari nilai daya dukung tanah yang dihitung dengan rumus Terzaghi, diperoleh besarnya nilai daya dukung tanah terendah pada kedalaman 1 meter sebesar 54,09 kN/m2, nilai daya dukung terendah pada kedalaman 2 meter sebesar 57,37 kN/m2 dan pada kedalaman 4 meter diperoleh daya dukung terendah 66,51 kN/m2. Hasil perhitungan menunjukkan bahwa perencanaan pondasi telapak biasa dengan beban aksial kolom yang cukup besar P = 2253,122 kN tidak memenuhi syarat, karena akan menutupi lebih dari sebagian areal bangunan, sehingga dalam hal ini sebaiknya dipergunakan jenis pondasi dangkal yang lain yaitu pondasi pelat. Pondasi pelat yang direncanakan adalah pondasi pelat dengan balok. Pondasi pelat direncanakan pada kedalaman 1 meter karena daya dukung tanah telah memenuhi syarat. Setelah melakukan perhitungan maka diperoleh bahwa pondasi pelat dengan balok dengan tebal pelat 25 cm dan balok pondasi 45 cm × 90 cm, dapat memenuhi persyaratan sesuai daya dukung tanah yang diijinkan. Kata kunci: pondasi dangkal, lempung lunak, muka air tanah dangkal.
ANALISIS PERBAIKAN STRUKTUR PEMBANGKIT LISTRIK TENAGA MIKRO HIDRO DI DESA TANGEB, KECAMATAN MENGWI, KABUPATEN BADUNG, BALI I Gusti Ngurah Putu Dharmayasa; I Komang Agus Ariana
PADURAKSA: Jurnal Teknik Sipil Universitas Warmadewa Vol. 6 No. 1 (2017)
Publisher : Program Studi Teknik Sipil, Fakultas Teknik dan Perencanaan, Universitas Warmadewa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (569.274 KB) | DOI: 10.22225/pd.6.1.459.51-65

Abstract

ABSTRACT Electricity supply is very important to improve people's lives. In Indonesia electricity is mostly generated by PLN as the state company that provide electricity for the entire people of Indonesia. PLN’s load is very high to provide electricity and to reduce the load of PLN, the potential of the electricity source should be utilized. One of the locations that have been built and used for micro-hydro power plant is the irrigation canal in the Tangeb village, Mengwi, Badung, Bali. Since it was built in 2014, micro-hydro power plant is expected to be used to provide electricity to the Pura Dalem within 100 meters from the power plant site, but can not function as expected because some parts of the structure were damaged, particularly on the foundation. In order for micro-hydro power plants can be used there should be analysis of the feasibility of existing structures. The research process begins with a review of the research sites, further soil sampling and ground testing in the field. The soil samples were tested in the laboratory. The test results of soil samples in the laboratory and field testing is used to calculate the carrying capacity of the land. The results of the soil bearing capacity were used to design the foundation. Analysis of the framework turbine is also conducted to determine whether the order turbines can still be used. Measurement of flow velocity is also performed to calculate the flow rate so that the electrical potential can be known. The results of the analysis of the feasibility of power plant micro-hydro in the Tangeb village obtained subgrade on the location of the turbine has a high bearing capacity that obtained the lowest allowable bearing capacity (qall) = 36.763 t/m2 based on test results in the laboratory, and the position of the hard soil in 1 meter depth. For steel frame buffer turbines, based on the results of the analysis with 9.7 ETABS program obtained that turbines are qualified or steel frame secure enough to support the movement of the turbine. The foundation of the turbine needs to be fixed with shallow foundation with a size of 0.95 m x 0.95 m, with a thickness 0.3 m and foundation depth of 1 meter. Reinforcement of foundation used for tension reinforcement φ 12 with a distance of 9 cm between the reinforcement and shrinkage reinforcement φ 12 with a distance of 18 cm. Potential electricity or power can be produced based on the calculation of the speed of the water, the water discharge resulting in low water level conditions is (W) = 3.3 kW. Keyword: micro-hydro, soil bearing capacity, foundation design
ANALISIS KEAMANAN LERENG DAN DAYA DUKUNG PONDASI UNTUK DAERAH BERLERENG CURAM DI TEGALALANG, GIANYAR-BALI I Gusti Ngurah Putu Dharmayasa; Dewa Ayu Nyoman Ardi Utami
PADURAKSA: Jurnal Teknik Sipil Universitas Warmadewa Vol. 6 No. 2 (2017)
Publisher : Program Studi Teknik Sipil, Fakultas Teknik dan Perencanaan, Universitas Warmadewa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (958.929 KB) | DOI: 10.22225/pd.6.2.482.108-122

Abstract

ABSTRACT The rapid development of tourism in Bali demands the availability of tourism facilities such as hotels, villas, inns and restaurants that can improve services to tourists. Due to the difficulty of finding land to build hotels and villas as well as to get a natural atmosphere, many villas and hotels are built on steep slopes and even on the edge of a cliff. One of the many villas and hotels planned to be built on steep slopes is a villa in Dukuh, Tegalalang, Gianyar, Bali. Before the tourism facilities are built it is necessary to analyze the safety of the slope and the soil bearing capacity in the location of the villa so it can be planned the depth and the size of the foundation that meet the safety requirements. Slope safety analysis has been done using SLOPE/W 2007 program and with manual calculation using Bishop method. For this analysis is required some data ie SPT data, CPT data, soil shear angle (ϕ), soil cohesion value (c), soil density (γ) and load on the building. The results of the analysis show that the location has a slope of 25 ° - 33 ° so that it is quite steep. The slope safety value (SF) obtained with the SLOPE / W is 1.00 in the location A-A and 1,431 in the B-B location, whereas the Bishop method is 0.91 in the location A-A and 1.10 in the location B-B, and it is quite vulnerable to the landslide. Analysis of foundation bearing capacity is planned with single bored pile with length of pile is 10 meters and using pile diameter 20 cm, 25 cm, 30 cm, 35 cm, 40 cm and 50 cm, is obtained the lowest allowable pile capacity based on data CPT and the highest allowable pile capacity based on laboratory data. Based on the structural analysis is obtained the maximum axial load (Pmax) on the foundation is 68456.67 kg and the pile diameter is 30 cm. The minimum axial load (Pmin) is 18085.26 kg and the pile diameter is 20 cm. Keywords: steep slope, Tegalalang, slope safety, bored pile
ANALISIS REMBESAN DI BAWAH TUBUH BENDUNGAN URUGAN I Gusti Ngurah Putu Dharmayasa
PADURAKSA: Jurnal Teknik Sipil Universitas Warmadewa Vol. 7 No. 1 (2018)
Publisher : Program Studi Teknik Sipil, Fakultas Teknik dan Perencanaan, Universitas Warmadewa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (736.156 KB) | DOI: 10.22225/pd.7.1.817.53-62

Abstract

ABSTRACT Indonesian government has built many dams in some areas and dams that have been built mostly earth dam. Earth dam becomes an option to be built because it was easier to obtain material to build the dam. Building process can be faster. Benel Dam in Melaya sub-district, Jembrana district, Bali province which had been evaluated was an earth dam that had been built in 2010. In order to provide benefits in the long time, the control of the seepage in the dam was needed so that safety can always be monitored. Measurements that were performed to determine the safety of the dam was measurement of the seepage discharge that occurs in the foundation. Therefore it is important to calculate the seepage discharge during the rainy season because in rainy season the water level in the upstream reaches the maximum position so it will cause maximum seepage in the foundation of the dam. The analysis was performed with SEEP/W and flow-net, with no cut off condition and with cut off. The result of the analysis that has been done, the seepage discharge in the dam’s foundation without cut-off for rainy season condition calculated with SEEP/W equal to 3.162 × 10-6 m3/sec and with cut-off obtained 2.077 × 10-6 m3/sec. While seepage discharge in the foundation of the dam without cut-off for rainy season conditions calculated with flow-net obtained 3.15 × 10-6 m3/sec and with a cut-off obtained 1.85 × 10-6m3/sec discharge. The results of this calculation show that the installation of cut off can reduce the amount of seepage. The seepage that occurs in the foundation of the dam was smaller than the allowed seepage that was 4.9206 m3/sec, so that the seepage discharge through the dam's foundation was safe for the dam. Key words: earth dam, flow-net, seepage discharge
DESAIN PONDASI TELAPAK BERDASARKAN UJI CPT DI DAERAH KUTA, BALI I Gusti Ngurah Putu Dharmayasa; Dewa Ayu Nyoman Ardi Utami
PADURAKSA: Jurnal Teknik Sipil Universitas Warmadewa Vol. 7 No. 2 (2018)
Publisher : Program Studi Teknik Sipil, Fakultas Teknik dan Perencanaan, Universitas Warmadewa

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (618.275 KB) | DOI: 10.22225/pd.7.2.942.123-137

Abstract

Rapid exploitation of land in Bali, especially in the Kuta area due to the development of tourism, makes it difficult to obtain land and the price is expensive, so that the available land should be maximally used. The impact of maximum land use is the influence on the structure of the building to be built. The building structure component which affected is the foundation. Due to the very tight density of the building, it is necessary to consider the shallow foundation design that was widely used in the Kuta area to avoid structural failure, so that the designed buildings could stand safely. If the foundation receives an eccentric load, it will be very dangerous for the building if it does not fit between the load received and the size of the foundation being made. This would be disastrous in case of a construction failure due to a design error, so it was desirable to do research on the design of the shallow foundation with an eccentric load on the buildings located in the Kuta tourist area to obtain an adequate shallow foundation design based on the soil data and structural load will be built. To analyze the bearing capacity of the soil and the design of the foundation, it is necessary to provide data from land investigation in the field. Land investigation in the field was conducted with CPT. Based on CPT results obtained hard layer soil at a depth of 2 - 2.2 m. The shallow foundation was planned at a depth of 1.6 meters and the foot size of 1.5 m x 1.5 m with minimum allowable bearing capacity (qa) was 20,99 t/m2. The result of analysis of 2-storey building structure resulted axial load (P) was 25750.88 kg, moment about the X axis (Mx) was 2529.70 kg m and moment about the Y axis (My) was 2929.65 kg m. The dimensions of the footing are 1.5 m x 1.5 m and the thickness (t) was 580 mm. Minimum pressure on foundation (q min) was 6.238 t/m2 and the maximum pressure on foundation (q max) was 17.583 t/m2. For bending reinforcement was used 19 mm diameter reinforcing steel with a distance of 150 mm.
ANALISIS KEAMANAN LERENG BENDUNGAN UTAMA PADA BENDUNGAN BENEL DI KABUPATEN JEMBRANA I G. N. Putu Dharmayasa; I W. Redana; Tjok Gde Suwarsa Putra
JURNAL SPEKTRAN Vol. 2, No.2, Juli 2014
Publisher : Master of Civil Engineering Program Study, Faculty of Engineering, Udayana University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (714.213 KB) | DOI: 10.24843/SPEKTRAN.2014.v02.i02.p09

Abstract

Development of dam very important for community surrounding the dam. To maintain that the benefits can be continued, it is necessary to review whether the safety of dams already meet the expected requirements. Dam safety to be reviewed when the dam was built and when the dam operating at this time. Security conditions associated with changes in water level on the upstream dam that affects the seepage on the body of dam and seepage under the dam. The water level also affects the slope of the dam when the dam has been operating.  Evaluation of the safety of the dam was conducted on Benel dam which located in Melaya District, Jembrana Regency, Bali Province. The results of the calculation of seepage (q) in the dam body with SEEP/W and flownet shows that, seepage discharge (q) which passes through under the dam and the body of dam is less than 1% (4.9206 m3/second) against the average flood discharge, so it has met the security requirements. Dam safety factor calculations without seismic load and with seismic load, for upstream slope and downstream slope when the dam was constructed,  when operating with flood water level,  when operating in the rainy season (normal water level),  when operating in the dry season (minimum water level) and with rapid draw down condition, with SLOPE/W and the Bishop method, the safety factor obtained more than minimum requirement by RSNI M-03-2002.
Analisis Dinding Penahan Tanah Dengan Pondasi Tiang Bor (Studi Kasus Tower Pln No. 71 Sutt 150 Kv Di Jalan Gatot Subroto Barat Denpasar) IGNP Dharmayasa; IGIB Eratodi
Dinamika Rekayasa Vol 12, No 2 (2016): Jurnal Ilmiah Dinamika Rekayasa - Agustus 2016
Publisher : Jenderal Soedirman University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.dr.2016.12.2.151

Abstract

Pemenuhan kebutuhan terhadap listrik sangat tinggi dan memerlukan jaringan yang mampu menjangkau ke seluruh pelanggan. Jaringan untuk mendistribusikan  listrik ke masyarakat sangat kompleks terdiri dari jaringan bawah tanah dan tiang-tiang serta tower. Bangunan tiang-tiang dan tower-tower tersebut sering menimbulkan masalah dalam pengunaan lahan karena memerlukan tempat yang cukup luas. Masalah penggunaaan lahan ini banyak timbul di daerah perkotaan karena semakin sulitnya lahan yang tidak terpakai dan harga lahan yang mahal. Salah satu lokasi yang mengalami permasalahan adalah di daerah Jalan Gatot Subroto Barat, Denpasar. Permasalahan yang terjadi di daerah ini adalah tower milik PLN yaitu tower SUTT 150 kV no.71 menghalangi jalan masuk ke lahan milik warga, sehingga harus melakukan rekayasa dinding penahan tanah dan pondasi dengan memotong sebagian tanah timbunan serta dinding penahan tanah tanpa mengurangi keamanan konstruksi tower SUTT. Untuk mengatasi masalah tersebut direncanakan suatu dinding penahan tanah dari tiang bor (bored pile) untuk mengganti dinding penahan tanah tipe gravitasi yang telah digunakan sebelumya. Sebelum dilakukan perhitungan perlu dilakukan penyelidikan kondisi tanah dasar di lokasi proyek sehingga dapat direncanakan dinding penahan tanah yang sesuai dan memadai. Setelah melakukan penyelidikan tanah di laboratorium dihasilkan nilai sudut geser tanah (ϕ) = 30º dan berat volume (γ) = 1,6 gr/cm3 dan setelah melakukan analisis pada dinding penahan tanah diperoleh nilai momen maksimum (M maks) = 2384,248 kg.m dan gaya geser maksimum (D maks) =  1098,952 kg.  Hasil perhitungan bahan dinding penahan tanah digunakan beton bertulang dinding susunan bored piled diameter 40 cm dengan kedalaman pancang 4,5 m dari tanah eksisting dan tinggi dinding penahan tanah 3,5 m diatas tanah, sehingga dibutuhkan struktur beton bertulang tiang bor (bored piled) panjang 8 m sebanyak 35 buah. Struktur beton bertulang bored piled diameter 40 cm menggunakan tulangan utama longitudinal 6D16 (6 buah besi ulir  dengan diameter 16 mm) dan tulangan geser menggunakan Ø10-250 (besi polos diameter 10 mm dengan jarak 250 mm).  Luas lahan baru yang didapatkan akibat pengurangan eksisting 10,20 x 13,10 m2 menjadi 5,2 x 6,3 m2, di bagian utara (depan) diperoleh  lahan sebesar 5,0 x 11,7 m2 dan jalan akses di bagian timur dari 2,5 m menjadi 3,9 m.
IDENTIFIKASI FAKTOR-FAKTOR RISIKO PADA PROYEK INFRASTRUKTUR DASAR DAN FASILITAS UMUM PENUNJANG PARIWISATA DI PELABUHAN BENOA, BALI I Komang Agus Ariana; I Gusti Ngurah Putu Dharmayasa; I Nengah Riana; Nyoman Bayu Kurniawan Bendesa
PADURAKSA: Jurnal Teknik Sipil Universitas Warmadewa Vol. 12 No. 1 (2023)
Publisher : Program Studi Teknik Sipil, Fakultas Teknik dan Perencanaan, Universitas Warmadewa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22225/pd.12.1.6154.114-120

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Secara umum risiko pada proyek konstruksi dapat mempengaruhi tujuan proyek yaitu mempengaruhi biaya, mutu dan waktu. Dalam proyek konstruksi, faktor risiko merupakan kemungkinan yang menyebabkan terjadinya kerugian. Studi ini dilakukan untuk mengetahui faktor-faktor risiko yang dominan dan mitigasi risiko yang menyebabkan keterlambatan pelaksanaan pada proyek infrastruktur dasar dan fasilitas umum penunjang pariwisata di Pelabuhan Benoa. Dalam penelitian ini, data dikumpulkan melalui kuisioner yang selanjutnya di cek validitas dan realibilitasnya menggunakan SPSS. Selanjutnya untuk menentukan risiko dominan digunakan metode severity index. Berdasarkan penelitian ini terdapat 20 faktor risiko yang menyebabkan keterlambatan proyek, Risiko yang dominan berdasarkan tingkat risiko adalah kejadian tak terduga (peristiwa bencana alam, kebakaran) sebesar 12%, perubahan pada pekerjaan yang sudah selesai sebesar 10%, perubahan lingkungan termasuk perubahan cuaca atau iklim di lokasi proyek sebesar 10%, perbaikan yang tidak sesuai dengan spesifikasi sebesar 8%, dan keterbatasan wewenang personil/pemilik dalam pengambilan keputusan sebesar 8%. Risiko-risiko dominan yang teridentifikasi pada proyek sangat perlu dicarikan solusi karena dampaknya yang sangat signifikan terhadap kinerja proyek.
Pelapisan (Coating) Sebagai Upaya Perawatan Struktur Pondasi Tiang Pancang di Jalan Tol Bali Mandara I Gusti Ngurah Putu Dharmayasa; Putu Ariawan; Ni Putu Asri Nilayanti
Jurnal Teknik Sipil Institut Teknologi Padang Vol 10 No 2 (2023): Jurnal Teknik Sipil Institut Teknologi Padang
Publisher : ITP Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21063/jts.2023.V1002.086-92

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Pekerjaan pelapisan (coating) termasuk proses penting dalam menjaga keawetan suatu komponen struktur tiang pancang Jalan Tol Bali Mandara. Dalam penelitian ini, sumber data diperoleh dari observasi di lapangan. Pekerjaan coating pada tahun 2022 dilakukan oleh PT. Jasamarga Tollroad Maintenance (JMTM) selama 1 bulan dengan melibatkan 40 pekerja. Coating dilakukan pada bagian upper structure dari pondasi tiang pancang Jalan Tol Bali Mandara pada 3 lokasi yaitu bagian akses Ngurah Rai, area mainroad dan area RAMP-4. Proses coating tiang pancang ini melalui 2 tahapan pekerjaan di antaranya pembersihan tiang pancang dan pelapisan tiang pancang. Untuk coating digunakan 2 bahan pelapis yaitu lapisan antifouling dan lapisan waterproofing yang mempunyai ketahanan sampai 5 tahun di lingkungan air laut. Jumlah total struktur pada tiang pancang yang dilapisi (coating) mencapai 1490 bagian, yang meliputi bagian akses Ngurah Rai 226 bagian struktur, mainroad sebanyak 1076 bagian struktur dan pada bagian RAMP-4 sebanyak 188 bagian struktur. Pemeliharaan struktur pondasi tiang pancang dengan coating akan dapat memperlambat kerusakan, sehingga tetap memenuhi standar keamanan dan beroperasi sesuai dengan umur rencana yang telah ditentukan.
MAINTENANCE MANAGEMENT ASSISTANCE FOR IMPROVING MONITORING OF LANDSIDE AREA FACILITIES AT I GUSTI NGURAH RAI AIRPORT BALI Ni Putu Richa Anggreni; Putu Indah Dianti Putri; I Gusti Ngurah Putu Dharmayasa
Abdi Dosen : Jurnal Pengabdian Pada Masyarakat Vol. 7 No. 4 (2023): DESEMBER
Publisher : LPPM Univ. Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/abdidos.v7i4.1967

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I Gusti Ngurah Rai Airport on the island of Bali, an important gateway for tourism in Indonesia, faces challenges in managing landside facilities to support the growing number of passengers. In this study, we investigate the implementation of maintenance management assistance at I Gusti Ngurah Rai Airport in Bali and its impact on facility inspections in rural areas. The research method collects information through interviews, observation and analysis of relevant documents. The conclusion of this study is that maintenance management assistance is an effective way to overcome ground facility control problems at I Gusti Ngurah Rai Airport in Bali.The significance of this research lies in the importance of continuity of maintenance management assistance to maintain the quality of facilities and provide the best experience for all airport users.