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Pengaruh Beban Vertikal Terhadap Daya Dukung Lateral Pondasi Tiang Nugroho, Soewignjo Agus
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Pile foundations are intended to hold both vertical and horizontal loads. Pile foundation design must take into account the lateral carrying capacity, especially on those that experience large lateral force. In fact, vertical load and horizontal load work simultaneously on the piles. Therefore it is necessary to look at the effect of the vertical load towards the carrying capacity the lateral piles. This study uses several models of pile foundation. The inclination of which the models are varied pile into three kinds, namely the inclination of 0° (upright pole), the inclination of 15o and 30o. While the vertical load is varied into four kinds, namely 0 kg load (no-load), 0,5 kg, 1 kg and 2 kg.The tests were done by inflicting horizontal loading on each variation of test models. Load test results are interpreted using the Tangent Intersection, Davisson method, the Chin method, and Mazurkiewicz method to get the ultimate lateral bearing capacity. The interpretation result of Tangent Intersection method showed the tendency to increase the carrying capacity of the lateral pile models as the vertical load increase. While the results of interpretation met of Chin method, generally showed the same trend. However, the interpretation of Davisson method and Mazurkiewicz methods did not indicate any trend of increasing the lateral carrying capacity with the increase of vertical load. The relationship between the carrying capacity and the inclination of the pile, from the interpretation of the data of load test results, did not indicate a trend of increasing the lateral carrying capacity of the pile models as the inclination of the piles increase.Keywords : pile foundation, model, lateral, vertical load
Studi Daya Dukung Pondasi Dangkal pada Tanah Gambut dengan Kombinasi Geotekstil dan Grid Bambu Nugroho, Soewignjo Agus
Jurnal Teknik Sipil Vol 18, No 1 (2011)
Publisher : Institut Teknologi Bandung

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Abstract

Abstrak. Pembangunan konstruksi di atas tanah gambut mempunyai banyak masalah, diantaranya adalah daya dukung tanah yang rendah dan penurunan yang besar. Penggunaan kombinasi grid bambu dan geotekstil diharapkan akan dapat mengatasi masalah tersebut. Penelitian ini bertujuan mengetahui hubungan antara kapasitas daya dukung dengan variasi kedalaman letak perkuatan, lebar perkuatan, spasi antara grid bambu dan geotekstil, dan sudut penyebaran beban. Perbedaan daya dukung antara tanah tanpa perkuatan dengan menggunakan perkuatan dinyatakan dalam Bearing Capacity Ratio (BCR). Dari studi model di laboratorium diperoleh hasil BCR maksimum sebesar 4,32 pada rasio L/B, d/B, dan s/B berturut-turut adalah 3, 0,25 dan 0,5. Sudut penyebaran beban maksimum sebesar 78,79° pada L/B dan d/B (B adalah lebar pondasi) berturut-turut adalah 4 dan 0,25. Peningkatan BCR dan sudut penyaluran beban sebanding dengan penambahan dimensi perkuatan dan berbanding terbalik dengan jarak perkuatan dari dasar pondasi. Abstract. The construction on peat soil have many problems, Two significant problems are low bearing capacity and high construction settlement. The usage of grid bamboo and geotextile as a composite system is expected to overcome those problems. The purpose of this research is to check the relationship of bearing capacity with depth of the reinforcement layer, width reinforcement layer and spacing of reinforcement layers between of grid bamboo and geotextile, and to the angle of stresses distribution. The difference of the bearing capacity between unreinforced soils and reinforced soils referred as Bearing Capacity Ratio (BCR). From study model at laboratory the result indicate that maximum BCR is 4.32 at ratio L/B, d/B and s/B are increasing 3, 0.25, and 0.5. Maximum the angle of distribution is 78.79° at L/B and d/B (B is width of footing) are increasing 4 and 0.25. The increasing of BCR and angle of stress distribution is proportional by the increasing of reinforcement dimension and it diversely correlated with depth of reinforcement.
Pengamatan Lendutan dan Rambatan Retak pada Perkerasan Lentur Diperkuat Geosintetik Akibat Beban Siklik Nugroho, Soewignjo Agus; Kurniati, Inna
Jurnal Teknik Sipil Vol 13, No 4 (2006)
Publisher : Institut Teknologi Bandung

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Abstract

Abstrak. Salah satu jenis kerusakan jalan adalah retak refleksi yaitu retak yang menggambarkan pola retakan di bawahnya. Retak ini terjadi karena perkerasan yang mengalami retak tidak diperbaiki dengan benar. Perbaikan yang dilakukan pada umumnya menutup retak dengan aspal cair sebelum pelaksanaan overlay. Penelitian ini bertujuan untuk mengetahui perilaku perkerasan lentur di laboratorium diperkuat dengan geosintetik serta pengaruh beban siklik pada lendutan di perkerasan lentur pada beberapa variasi kandungan aspal. Studi juga memperlihatkan bahwa pada kadar aspal optimum, bahan geotekstil paling mampu mereduksi besarnya lendutan dan kecepatan rambatan retak dibandingkan pada kadar aspal di bawah dan di atas kadar optimal.Abstract. Reflection crack is one type of road crack. Repairing is usually done by overlay. This research examined role of geosintetics as reinforcement in overlay of flexible pavement. This research is done by making a beam model made of aggregate and asphalt, representing flexible pavement. Models are tested with cyclic loads. Observation is focused on the influence of asphalt content and using geotextile to the rate of crack propagation. At optimum asphalt content, result shows that geosintetics reduces displacement and rate of crack propagation.
Pengaruh Jumlah Pelat Helical Terhadap Daya Dukung Tekan Pondasi Tiang Helical Pada Tanah Gambut Dengan Metoda Pembebanan Constant Stress Of Penetration Usman, Fauzan; Fatnanta, Ferry; Nugroho, Soewignjo Agus
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 1 Januari s/d Juni 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The selection of the type of foundation is very influential on the strength of a building construction. One of the alternatives that can be used as a substitute for cerucuk foundationis helical pile foundation. Helical pile a manufactured steel foundation consisting of one or more helix-shaped bearing plates affixed to a central shaft that is rotated into the ground tosupport structures. This research presented result of static loading test constant stress of penetration method helical pile conducted at peat. Result of data from loading test in theform of load and settlement will be interpreted with tangent of intersection method, and Terzaghi and Peck method. The addition of helical plate under first helical does not give anyeffect on pile capacity if helical diameter is smaller, when a helical plate at the same diameter is added, the pile capacity increase. For empiric formula calculation of helical pilecapacities show that chylindrical shear closer to the results of loading test, with standard error of 1,06.Key words: helical pile, peat, individual plate bearing, cylinder shear
Value Estimation Of California Bearing Ratio From Hand Cone Penetrometer Test For Pekanbaru Soils Nugroho, Soewignjo Agus
Jurnal Teknik Sipil Vol 26, No 1 (2019)
Publisher : Institut Teknologi Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1793.439 KB) | DOI: 10.5614/jts.v26i1.7435

Abstract

In practice, the design of pavement is commonly based on the California Bearing Ratio (CBR) test. This research was performed to study the local correlation between Hand Cone Penetrometer (HCP) tests to the field CBR value. The local correlation is determined based on comparisons of HCP and CBR test results for the soil with same density which have been taken from several locations in Pekanbaru City, Indonesia. It was found that there is an approximate linear relation in log scale between HCP test results to CBR values for a certain density of soil. Correlation for HCP and density to CBR has been put forward for the local correlation between those two values. Verification of the formula has shown that the correlation can be used relatively accurate for predicting the field CBR values from the HCP test for in-organic soils. For organic soil, the formula needs to be further researched.
PENGARUH KEMIRINGAN PONDASI TIANG TERHADAP DAYA DUKUNG TIANG TUNGGAL AKIBAT BEBAN VERTIKAL Suryadi, Rudy; Nugroho, Soewignjo Agus; ', Muhardi
Proceedings ACES (Annual Civil Engineering Seminar) Vol 1 (2015): Annual Civil Engineering Seminar (ACES)
Publisher : Proceedings ACES (Annual Civil Engineering Seminar)

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Abstract

Pondasi tiang adalah suatu konstruksi sebagai penopang bangunan. Dalam beberapa konstruksi,pondasi tiang sengaja dimiringkan untuk menahan beban lateral yang cukup besar.Kecenderungan tiang miring dalam menopang beban vertikal juga perlu diperhatikan. Kajianberupa eksperimental laboratorium dilakukan dengan membuat model pondasi tiang diameter 2cm. Model pondasi tiang dimiringkan sebesar ±0o, ±15o, dan ±30o. Kemudian dilakukan ujipembebanan pada masing-masing model pondasi tiang, dan dilakukan interpretasi data hasil ujidengan metode grafik p-y, Mazurkiewicz, dan Chin, serta membandingkan dengan hasil analisaformula empirik. Hasil pengujian dengan menggunakan interpretasi metode grafik p-ymenunjukkan adanya kecenderungan berkurangnya daya dukung seiring bertambahnyakemiringan model pondasi tiang. Analisa dengan formula empirik juga menunjukkan bentukkecenderungan yang sama. Namun pada metode Mazurkiewicz dan Chin tidak menunjukkankecenderungan yang sama dengan analisa menggunakan formula empirik.Kata kunci: model, pasir, pondasi tiang, tiang miring, uji beban
KAJIAN EKSPERIMENTAL DAN EMPIRIK PENGARUH DIMENSI FONDASI DANGKAL Nugroho, Soewignjo Agus; Fatnanta, Ferry; Subrata, Lingga Panji
Proceedings ACES (Annual Civil Engineering Seminar) Vol 1 (2015): Annual Civil Engineering Seminar (ACES)
Publisher : Proceedings ACES (Annual Civil Engineering Seminar)

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Abstract

Distribusi penyebaran beban pada fondasi dangkal terjadi sepanjang lebar fondasi. Beberapabentuk fondasi dangkal yaitu bujur sangkar, dan persegi panjang dibuat untuk menganalisapengaruh bentuk fondasi pada luasan yang sama terhadap kapasitas dukung fondasi akibatbeban aksial di atas tanah pasir. Kajian eksperimental laboratorium dilakukan dengan membuatmodel fondasi dengan luas 100 cm2, 150 cm2 dan 200 cm2. Hasil eksperimen menunjukan,pada luasan yang sama, bentuk bujur sangkar dapat mendukung beban yang lebih besar daripada bentuk persegi panjang. Penambahan luasan 50-100% akan membuat kapasitas dukungbertambah 102,016-157,661% untuk bujur sangkar, 135,751-228,497% untuk persegi panjang.Ada perbedaan hasil pengamatan dan rumus empirik, dimana peningkatan kapasitas lebihsignifikan dari hasil pengamatan. Peningkatan kapasitas berbanding lurus dengan penambahanluasan dengan peningkatan paling besar terjadi pada penurunan kecil dan peningkatankapasitas makin kecil pada penurunan yang semakin besar.Kata kunci: beban, kapasitas dukung, pasir, penurunan, fondasi dangkal.
Penggunaan Pecahan Genteng sebagai Agregat untuk Lapis Fondasi Perkerasan Lentur Nugroho, Soewignjo Agus
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 14, Nomor 2, Edisi XXXV, JUNI 2006
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (262.993 KB) | DOI: 10.14710/mkts.v14i2.2091

Abstract

Lime has been used for long time as soils stabilizer in sub base and base construction of road. This research studied influence of lime as stabilizer mixed with debris of clay roof as aggregate. Gradation specification is accordance to Bina marga Standard. Lime content used in this research are 0%; 2,5%; 5%; 7,5%; 10%; 12% and 15%.Result of this research shows as lime content increases, California Bearing Ratio (CBR) value for base also increase 80%; 85%; 88%; 91%; 95%; 100% and 110% respectively. For sub base CBR value increase respectively i.e 50%; 60%; 705; 74%; 85%; 90% and 95%.Keywords: stabilization, debris of clay roof, California Bearing RatioPermalink: http://www.ejournal.undip.ac.id/index.php/mkts/article/view/2091[How to cite: Nugroho, S.A., 2006, Penggunaan Pecahan Genteng sebagai Agregat untuk Lapis Fondasi Perkerasan Lentur, Jurnal Media Komunikasi Teknik Sipil, Volume 14, Nomor 2, pp. 112-118]
Variasi Kadar Aspal pada Perkerasan Lentur Diperkuat dengan Geosintetik Nugroho, Soewignjo Agus
MEDIA KOMUNIKASI TEKNIK SIPIL Volume 14, Nomor 3, Edisi XXXVI, OKTOBER 2006
Publisher : Department of Civil Engineering, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (202.942 KB) | DOI: 10.14710/mkts.v14i3.3948

Abstract

Reflection crack is one type of road crack. Repairing is usually done by overlay. This research examine role of geosintetic as reinforcement in overlay of flexible pavement. This research is done by making a beams model made of aggregate and asphalt, representing flexible pavement. Models are tested with cyclic loads. Observation is focused on the influence of asphalt content to the rate of crack propagation. Results shows that geosintetics reduced rate of crack propagation, while optimum asphalt content still should be used in design. Keywords: geosintetics, overlay, reflection crack, rate of crack propagationPermalink: http://www.ejournal.undip.ac.id/index.php/mkts/article/view/3948[How to cite: Nugroho, S.A., 2006, Variasi Kadar Aspal pada Perkerasan Lentur Diperkuat dengan Geosintetik, Jurnal Media Komunikasi Teknik Sipil, Volume 14, Nomor 3, pp. 213-223]
Pengaruh Penambahan Kapur Dan Abu Batu Bata Terhadap Nilai Kuat Tekan Bebas Dan CBR Pada Tanah Lempung Kecamatan Tenayan Raya Prayogo, Giri; Nugroho, Soewignjo Agus; Fatnanta, Ferry
Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5 (2018): Edisi 2 Juli s/d Desember 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

A Tenayan Raya subdistrict is an area where there is an adequate thick of clay layer. This condition is seen during rain that the soil become softer, while in dry conditions there are many cracks on that soil. In case, it can cause some damages to the building due to the tilt of the building's foundation as an effect of shrinkage soil. Tenayan Raya also known as a brick production area. The brick production process may generate ash as a waste of brick kilns which has not been utilized optimally. This study aims to utilize brick ash as an additive material to improve clay properties in term of reducing its shrinkage feature. A certain amount of brick ash were mixed to clay soil and lime also were two added as a companion of a stabilizing agent. Some variation properties of two additive materials were applied in the sample of UCS and CBR tests. The effect of curing and soaking time was also be checked in term of UCS and CBR value changed. Based on properties tests, the clay soil classified standard. The mixture of 80% clay + 10% lime + 10% brick ash, in OMC condition, has the maximum of UCS and CBR laboratory test value. Curing and soaking time also has a significant contribution in increasing UCS and CBR value. The maximum value of both tests was reached at day 7th of curing and soaking time.Keywords : Clay, Swelling, Stabilization, Lime, Brick ash, Soil bearing capacity