Devi Sundary
Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala Jl. Tgk. Syeh Abdul Rauf No. 7, Darussalam Banda Aceh 23111

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INTERPRETASI BEARING LAYER (KONTUR LAPISAN TANAH KERAS) DI BAWAH PERMUKAAN DENGAN PROGRAM SURFER (KECAMATAN : SYIAH KUALA – ULEE KARENG – KUTA ALAM) Munirwansyah, Munirwansyah; Sundary, Devi; Nugraha, Gartika Setiya
Jurnal Teknik Sipil Vol 2, No 3 (2013)
Publisher : Department of Civil Engineering, Syiah Kuala University

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Abstract: This study aims to locate the bearing layer below the ground surface at the location of Kuala Shiite district, sub-district and district Ulee Kareng Kuta Alam. The data used is the Cone Penetration Test (CPT) were obtained from the laboratory of Soil Mechanics. The number of points is 38 points sondir. The location coordinates of the point of data collection in the field research carried out by using GPS (Global Positioning System) and the tool is the only satellite navigation system that is functioning properly. Data processing was performed using the surfers. Surfer is one of the software that is used for the manufacture of contour maps and three-dimensional modeling based on the grid, this software is a XYZ plotting tabular data into pieces of irregular rectangular dots (grid) is irregular. Grid is a series of vertical and horizontal lines in a rectangular surfer and used as the basis for forming a three- dimensional contour and surface. The vertical and horizontal lines have points of intersection. At this intersection point Z value is stored in the form of point heights or depths. Gridding is the process of formation of a regular series of Z values from a data is XYZ. The results of this study can be used for buildings or other infrastructure planning in the transition area and the mainland city of Banda Aceh. To determine the subgrade layer (bearing stratum), for building simple to use subsoil with qc = 0-10 kg/cm2. For buildings with load being able to use a layer of soil with qc = 10-50 kg/cm2. For buildings with a large load, it can use a layer of soil with 50-120 kg/cm2 and qc = qc => 120 kg/cm2. This study provides further information about the subsoil to the planner for bearing pile foundation stratum in order to match the load.Keywords : Bearing Layer, Cone Penetration Test, grid, surface, bearing stratum, contour.Abstrak: Penelitian ini bertujuan untuk mencari letak bearing layer di bawah permukaan tanah pada lokasi Kecamatan Syiah Kuala, Kecamatan Ulee Kareng, dan Kecamatan Kuta Alam. Data yang digunakan adalah data Cone Penetration Test (CPT) yang diperoleh dari laboratorium Mekanika Tanah. Adapun jumlah titik sondir adalah 38 titik. Pengambilan data letak koordinat titik penelitian di lapangan dilakukan dengan menggunakan GPS (Global Positioning System) dan alat ini satu-satunya sistem navigasi satelit yang berfungsi dengan baik. Pengolahan data dilakukan dengan menggunakan program surfer. Surfer merupakan salah satu perangkat lunak yang digunakan untuk pembuatan peta kontur dan pemodelan tiga dimensi yang berdasarkan pada grid. Perangkat lunak ini merupakan plotting data tabular XYZ tak beraturan menjadi lembar titik-titik segi empat (grid) yang beraturan. Grid adalah serangkaian garis vertikal dan horizontal yang dalam surfer berbentuk segi empat dan digunakan sebagai dasar pembentuk kontur dan surface tiga dimensi. Garis vertikal dan horizontal ini memiliki titik-titik perpotongan. Pada titik perpotongan ini disimpan nilai Z yang berupa titik ketinggian atau kedalaman. Gridding merupakan proses pembentukan rangkaian nilai Z yang teratur dari sebuah data XYZ. Hasil dari penelitian ini dapat digunakan untuk perencanaan gedung atau infrastruktur lainnya di daerah daratan dan transisi kota Banda Aceh. Untuk menentukan lapisan tanah dasar (bearing stratum), untuk bangunan sederhana menggunakan lapisan tanah dengan qc = 0-10 kg/cm2. Untuk bangunan dengan beban sedang dapat menggunakan lapisan tanah dengan qc = 10-50 kg/cm2. Untuk bangunan dengan beban besar maka dapat menggunakan lapisan tanah dengan qc = 50-120 kg/cm2 dan qc ≥ 120 kg/cm2. Penelitian ini memberikan informasi lebih lanjut tentang lapisan tanah kepada perencana untuk bearing stratum agar dapat ditumpukan fondasi sesuai dengan beban.Kata kunci : Bearing Layer, Cone Penetration Test, grid, surface,lapisan tanah dasar, kontur
KORELASI Ø DAN C PADA UJI TRIAKSIAL DENGAN INDEKS PLASTISITAS TANAH DESA NEUHEUN ACEH BESAR Sundary, Devi; Marwan, Marwan
Jurnal Teknik Sipil Vol 2, No 3 (2013)
Publisher : Department of Civil Engineering, Syiah Kuala University

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Abstract: This research aims to evaluate effect of soil plasticity index (PI) to shear strength parameters, e.i. the angle of shearing (φ) and cohesion value (c). The soil sample that to be used for the research was taken from Neuheun Village, Mesjid Raya Subdistrict, Aceh Besar District. Based on AASHTO soil classification, the soil sample was Group A-7-6, wereas based on USCS soil classification, the soil was sandy clay of CL symbol. Soil specimen for Undisturbed Sample (UDS) and Disturbed Sample (DS) were 20 samples respectively, each sample was made to be three sub samples. The result of research shows there is a linier correlation of shearing angle to PI, i.e., φ = -1,3783 PI + 34,345; R2 = 0,6939 for Undisturbed Samples (UDS) and φ = -1,7089 PI + 51,963; R2 = 0,7488 for Disturbed Samples (DS). The result of research also shows there is a linier correlation of cohesion value to PI, i.e., c = - 0,0952 PI + 2,5246; R2 = 0,7489 for UDS and c = -0,142 PI + 4,3785; R2 = 0,8741 for DS. It can be conclused that shear strength parameters for all tested samples in this research influenced by soil plasticity index. The higher soil plasticity index resulted the lower Shear Strength Parameters φ and c .Keywords : shear strength parameters, soil plasticity index, undisturbed and disturbed sampleAbstrak: Penelitian ini bertujuan untuk mengetahui hubungan nilai parameter kuat geser, yaitu: sudut geser (φ) dan nilai kohesi (c) dengan indeks plastisitas (Plasticity Index, PI) tanah. Tanah yang digunakan pada penelitian ini berasal dari Desa Neuheun Kecamatan Mesjid Raya Kabupaten Aceh Besar. Lokasi tersebut merupakan lereng gunung yang rawan terjadinya longsor. Kawasan ini telah digunakan sebagai sarana transportasi untuk menuju quarry yang terletak di ujung kawasan beberapa kompleks perumahan penduduk yang belum diketahui kekuatan daya dukung tanah dasarnya. Menurut klasifikasi AASHTO tanah Desa Neuheun tergolong jenis tanah lempung dengan simbol kelompok A-7-6, sedangkan menurut klasifikasi USCS tanah tersebut termasuk golongan tanah lempung berpasir dan diberi simbol CL. Pengujian kuat geser dilakukan dengan menggunakan alat uji Triaksial. Jumlah benda uji pada masing-masing tanah tidak terganggu (Undisturbed Sample, UDS) dan tanah terganggu (Disturbed Sample, DS) 20 sampel, tiap sampel dibuat menjadi tiga sub sampel. Hasil penelitian memperlihatkan bahwa hubungan nilai sudut geser dengan PI sampel tanah menunjukkan adanya hubungan linier dengan persamaan φ = -1,3783 PI + 34,345; R2 = 0,6939 untuk tanah UDS dan φ = -1,7089 PI + 51,963; R2 = 0,7488 untuk DS. Hubungan nilai kohesi dengan indeks plastisitas sampel tanah juga menunjukkan hubungan linier dengan persamaan c = -0,0952 PI + 2,5246; R2 = 0,7489 pada sampel tanah tidak terganggu dan c = -0,142 PI + 4,3785; R2 = 0,8741 pada sampel tanah terganggu. Dengan demikian dapat disimpulkan bahwa berdasarkan persamaan yang didapat dari hasil hubungan linier, nilai parameter kuat geser pada setiap lokasi pengambilan sampel tanah dipengaruhi oleh nilai indeks plastisitas tanah. Semakin tinggi nilai indeks plastisitas tanah maka nilai parameter kuat geser φ dan c semakin rendah.Kata kunci : parameter kuat geser, indeks plastisitas, tanah tidak terganggu dan terganggu.
ANALISIS STABILITAS LERENG PADA RUAS JALAN BLANGKEJEREN - AWEAUNAN KABUPATEN GAYO LUES PROVINSI NANGGROE ACEH DARUSSALAM Gunawan, Hendra; Chairullah, Banta; Sundary, Devi
Jurnal Teknik Sipil Vol 3, No 2 (2014): Volume 3, Nomor 2, Januari 2014
Publisher : Department of Civil Engineering, Syiah Kuala University

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Roads Blangkejeren - Laweaunan is a one-lane road transport in the Province ofNanggroe Aceh Darussalam, which has an altitude slopes varying between 3.5 to 4.3 m. Earthquakes, rainfall and altitude slopes greatly affect the stability of the slopes on theseroads. The stability analysis aims to obtain a slope stability conditions that meet safety requirements at Jalan Blangkejeren - Laweaunan Gayo Lues District of Nanggroe Aceh Darussalam. Slope stability design using the simplified Bishop method and Plaxissoftware. The use of these methods has given the ease and accuracy in solving the problem of stability of the slope to meet the security requirements of slope stability. Based on the analysis of the simplified Bishop method and Plaxis at Jalan Blangkejeren - Laweaunan STA. 03 + 650, STA. 03 + 700, and STA. 03 + 750 which has a slope of each 63,4°(1H: 2V) concluded that the slope is not safe, so it needs a change of slope. After the change of slope on the slopes of the results showed that the slope of 30°-24°, the slope of qualified safety with a safety factor (STA. 03 + 650), from 1.299 to 1.468 (STA. 03 + 700) from 1.346 to 1.515 (STA. 03 + 750). Based on the results of the slope stability analysis obtained slope collapse semicircular arc (rotational sliding). The slope stability are qualified security that permitted > 1 as recommended by Abramson (1996)
ANALISIS KESTABILAN LERENG BATU DI JALAN RAYA LHOKNGA KM 17,8 KABUPATEN ACEH BESAR Rusydy, Ibnu; Al-Huda, Nafisah; Jamaluddin, Khaizal; Sundary, Devi; Nugraha, Gartika Setiya
JURNAL RISET GEOLOGI DAN PERTAMBANGAN Vol 27, No 2 (2017)
Publisher : Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (926.66 KB) | DOI: 10.14203/risetgeotam2017.v27.452

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Penelitian kestabilan lereng batuan menggunakan metode analisis kinematik lereng dan klasifikasi massa batuan dilakukan di lereng pinggir jalan Banda Aceh – Calang di Km 17,8 di Kecamatan Lhoknga Kabupaten Aceh Besar. Penelitian ini bertujuan untuk mengetahui jenis longsoran yang akan terjadi di masa yang akan datang, menilai kualitas massa batuan pembentuk lereng, dan tingkat kestabilannya berdasarkan klasifikasi SMR. Akuisisi data struktur massa batuan dilakukan di sepanjang lereng menggunakan metode scanline. Data yang diambil berupa arah kemiringan bidang diskontinuitas, arah bidang, dan kondisi bidang diskontinuitas bidang berupa kemenerusan, kekasaran, bukaan, isian, luahan air dan tingkat perlapukan. Analisis kinematik lereng didapatkan berdasarkan hasil proyeksi stereografi dan analisis kualitas serta kestabilan lereng batuan berdasarkan parameter RMR dan SMR. Hasil analisis kinematik lereng menunjukkan jenis longsoran yang akan terjadi di lereng 1 berupa longsoran  baji dan planar. Di lereng 2 dimungkinkan terjadinya longsoran gulingan/toppling karena bidang joint set yang berlawanan dengan arah lereng. Nilai RMR di lereng 1 sebesar 63 dengan kategori batuan Bagus dan RMR lereng 2 sebesar 57 kategori batuan sedang. Nilai SMR terendah di lereng 1 sebesar 29 (kategori Buruk) untuk longsoran planar dan 53 (kategori Sedang) di lereng 2 longsoran gulingan. Lereng 1 memiliki probabilitas kejadian longsor planar sebesar 60%.Rock slope stability was assessed using the slope kinematic analysis method and rock mass classification on the roadside slope of Banda Aceh - Calang at 17.8 Km in Lhoknga Sub-district, Aceh Besar District. This study aims to determine the types of landslides that will occur in the future by determining the Rock Mass Rating (RMR) and analyzing stability based on the Slope Mass Rating (SMR). The data acquisition of rock mass structures performed the scan line method along the slope. The data taken are the dip and the strike of the discontinuity plane, and the conditions of discontinuity in the form of persistence, aperture, roughness, infilling, weathering and Groundwater conditions. Slope kinematic analysis was conducted based on stereographic projection and analyses of both rock slope quality and stability were based on RMR and SMR parameters. The result of the slope kinematic analysis shows that landslides that occur in slope 1 will be in wedge and planar forms. On slope 2, possible failure is in the form of toppling due to the joint set positioned opposite to the slope direction. The RMR value in slope 1 is 63, categorized as Good rock and the RMR in slope 2 is 57, which is in the medium rock category. The lowest SMR value in slope 1 was 29 as a Bad class for planar failure, and 53 as a Normal category in slope 2 is toppling failure. Slope 1 has a 60 % probability of a planar failure event.
HUBUNGAN NILAI CALIFORNIA BEARING RATIO DENGAN INDEKS PLASTISITAS TANAH DESA NEUHEUN ACEH BESAR Marwan, Marwan; Sundary, Devi
Jurnal Teknik Sipil Vol 2, No 1 (2012): Volume 2, Nomor 1, September 2012
Publisher : Department of Civil Engineering, Syiah Kuala University

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Abstract: This research aims to evaluate effect of soil plasticity index (PI) to California Bearing Ratio (CBR) value. The soil sample that to be used for the research was taken from Neuheun Village, Mesjid Raya Subdistrict, Aceh Besar District. Based on AASHTO soil classification, the soil sample was Group A-7-6, wereas based on USCS soil classification, the soil was sandy clay of CL symbol. Soil specimen for Disturbed Sample (DS) and Undisturbed Sample (UDS) were 20 samples respectively, 10 of unsoaked samples and 10 of soaked samples with waiting period of 4 days. The result of research shows there is a linier correlation of CBR to PI, i.e., CBR = - 0,990 PI + 28,79; R2 = 0,868 for unsoaked and DS (Disturbed Sample). For unsoaked and UDS (Undisturbed Sample), the linear correlation results CBR = - 0,464 PI + 10,60; R2 = 0,728. The result of research also shows there is a linier correlation of CBR to PI for soaked and DS (Disturbed Sample). , i.e., CBR = - 0,673 PI + 15,88; R2 = 0,706. For soaked and UDS (Undisturbed Sample), the linear correlation results CBR = - 0,132 PI + 3,625; R2 = 0,887. It can be conclused that CBR value for all tested samples in this research influenced by soil plasticity index. The higher soil plasticity index resulted the lower CBR value.Keywords : CBR value, soil plasticity index, soaked and disturbed sampleAbstrak: Penelitian ini bertujuan untuk mengetahui hubungan nilai CBR (California Bearing Ratio) dengan indeks plastisitas (Plasticity Index, PI) tanah. Tanah yang digunakan pada penelitian ini berasal dari Desa Neuheun Kecamatan Mesjid Raya Kabupaten Aceh Besar. Lokasi tersebut merupakan lereng gunung yang rawan terjadinya longsor. Kawasan ini telah digunakan sebagai sarana transportasi untuk menuju quarry yang terletak di ujung kawasan beberapa kompleks perumahan penduduk yang belum diketahui kekuatan daya dukung tanah dasarnya. Menurut klasifikasi AASHTO tanah Desa Neuheun tergolong jenis tanah lempung dengan simbol kelompok A-7-6, sedangkan menurut klasifikasi USCS tanah tersebut termasuk golongan tanah lempung berpasir dan diberi simbol CL. Pengujian CBR dilakukan dengan menggunakan alat uji CBR. Jumlah benda uji pada masing-masing tanah terganggu (Disturbed Sample, DS) dan tidak terganggu (Undisturbed Sample, UDS) 20 sampel, 10 sampel untuk benda uji  tidak terendam dan 10 sampel untuk benda uji rendaman dengan masa tunggu 4 hari yang diikuti dengan pengukuran nilai pengembangannya. Hasil penelitian memperlihatkan bahwa hubungan nilai CBR tidak terendam dengan PI sampel tanah menunjukkan adanya hubungan linier dengan persamaan CBR = - 0,990 PI + 28,79; R2 = 0,868 pada sampel tanah terganggu dan CBR = - 0,464 PI + 10,60; R2 = 0,728 pada sampel tanah tidak terganggu.   Hubungan nilai CBR terendam dengan indeks plastisitas sampel tanah juga menunjukkan hubungan linier dengan persamaan CBR = - 0,673 PI + 15,88; R2 = 0,706 pada sampel tanah terganggu dan CBR = - 0,132 PI + 3,625; R2 = 0,887 pada sampel tanah tidak terganggu. Dengan demikian dapat disimpulkan bahwa berdasarkan persamaan yang didapat dari hasil hubungan linier, nilai CBR pada setiap lokasi pengambilan sampel tanah dipengaruhi oleh nilai indeks plastisitas tanah. Semakin tinggi nilai indeks plastisitas tanah maka nilai CBR semakin rendah.Kata kunci : Nilai California Bearing Ratio, indeks plastisitas, tanah terganggu dan terendam
HUBUNGAN PARAMETER KUAT GESER LANGSUNG DENGAN INDEKS PLASTISITAS TANAH DESA NEUHEUN ACEH BESAR Marwan, Marwan; Munirwan, Reza Pahlevi; Sundary, Devi
Jurnal Teknik Sipil Vol 3, No 1 (2013): Jurnal Teknik Sipil Volume 3, Nomor 1, September 2013
Publisher : Department of Civil Engineering, Syiah Kuala University

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This research aims to evaluate effect of soil plasticity index (PI) to shear strength parameters, e.i. the angle of shearing (φ) and cohesion value (c). Parameters of φ and c obtained from Direct Shear Test in soil mechanics laboratory. The soil samples used for the research were taken from Neuheun Village, Mesjid Raya Subdistrict, and Aceh Besar District. Based on AASHTO soil classification, the soil sample is a Group A-7-6, whereas based on USCS soil classification, the soil is sandy clay of CL symbol. Soil specimen for Undisturbed Sample (UDS) and Disturbed Sample (DS) were 20 samples respectively, each sample was made to be three sub samples. The result of research shows that there is a linier correlation of shearing angle to PI, i.e., φ = -0,700 IP + 47,474, R2 = 0.882 for Undisturbed Samples (UDS) and φ = -1,757 IP + 59,313, R2 = 0.891 for Disturbed Samples (DS). The result of research also shows there is a linier correlation of cohesion value to PI, i.e., c = -0,053 IP + 1,569, R2 = 0.887 for UDS and c = -0,076 IP + 1,882, R2 = 0.783 for DS. It can be concluded that shear strength parameters for all tested samples in this research influenced by soil plasticity index. The higher soil plasticity index resulted the lower Shear Strength Parameters.
KAJIAN KUALITAS BATU BATA MERAH MELALUI PEMANFAATAN BAHAN SEDIMENTASI BENDUNG KRUENG ACEH Azmeri, Azmeri; Sundary, Devi; Sapha, Diana
Jurnal Teknik Sipil Vol 6, No 2 (2017): Volume 6, Nomor 2, Januari 2017
Publisher : Department of Civil Engineering, Syiah Kuala University

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Abstract : The condition of a high sedimentation at the Krueng Aceh dam can be a business opportunity for making the red bricks. This sedimentation condition occurs throughout the year and along the Krueng Aceh river that also can cause flooding and damage to infrastructure. Based on these problems, the study aims to assess the utilization of the sediment as basic material for red bricks production. This research method create and physical testing samples of bricks. Testing is done by using a sample piece of brick from the mixture of sediment material and material for normal bricks. The two types of bricks that have the absorptive capacity less than 20% and the level of dryness well marked with a shrill sound. Hardness is good for both types of bricks, it is marked with the scratches that are not too deep. Both types of bricks odor also have no salt content, which is marked with no white patches on a dry surface. Brick compressive strength of normal bricks (BMnor) is 381.05 kg/cm2, and brick with a mixture of sediment of Krueng Aceh dam is 215.34 kg/cm2. Both the results of the compressive strength are above the minimum standard required by SNI 15-2094-2000 ie 50 kg/cm2. Through this study, it is expected that sedimentary material can be used as material for the manufacture of red bricks and boost the economy of the industry of red bricks around Banda Aceh and Aceh Besar.Keywords : red brick, sedimentary material, Krueng Aceh, compressive strength.Abstrak: Kondisi sedimentasi yang tinggi pada Bendung Krueng Aceh dapat menjadi peluang perkembangan usaha pembuatan batu bata merah. Kondisi initerjadi sepanjang tahun dan di sepanjang ruas sungai Krueng Aceh yang dapat menyebabkan banjir dan kerusakan infrastruktur. Berdasarkan permasalahan tersebut, maka penelitian ini bertujuan untuk mengkaji penggunaan sedimen sebagai bahan pembentuk batu bata merah. Metode penelitian ini dengan  membuat dan menguji fisik sampel batu bata. Pengujian dilakukan dengan menggunakan benda uji batu bata dari sampel campuran material sedimen dan batu bata produksi saat ini (bata normal). Kedua jenis batu bata tersebut memiliki daya serap kurang dari 20% dan tingkat kekeringan baik yang ditandai dengan bunyi nyaring. Kekerasannya baik untuk kedua jenis batu bata, ditandai dengan bekas goresan yang tidak terlalu dalam. Kedua jenis bau bata juga tidak memiliki kandungan garam, yang ditandai tanpa bercak-bercak putih di permukaan yang kering. Kuat tekan batu bata normal (BMnor)sebesar 381,05 kg/cm2 dan batu bata dengan campuran sedimen Bendung Krueng Aceh sebesar 215,34 kg/cm2. Kedua  kuat tekan di atas standar minimal SNI 15-2094-2000 yaitu 50 kg/cm2. Melalui kajian ini, diharapkan bahan sedimen dapat dimanfaatkan untuk pembuatan batu bata merah dapat meningkatkan perekonomian kelompok industri batu bata merah di sekitar Banda Aceh dan Aceh Besar.Kata kunci : Batu bata merah, bahan sedimen, Krueng Aceh, kuat tekan.
PEMETAAN DAYA DUKUNG TANAH DIBEBERAPA DAERAH ACEH BESAR MENGGUNAKAN DATA CONE PENETRATION TEST Sundary, Devi; Chairullah, Banta; Gunawan, Hendra
Jurnal Teknik Sipil Vol 3, No 2 (2014): Volume 3, Nomor 2, Januari 2014
Publisher : Department of Civil Engineering, Syiah Kuala University

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Bearing capacity of the soil and the foundation has a close link with the level of safety to the occupants of a building. A foundation design said to be true if the load transmitted by the foundation to the ground does not exceed the power of the land concerned.If the soil strength is exceeded, then a decrease (settlement) excessive or collapse of land will occur, causing damage to the construction which is above the foundation. This research aimsto obtain the value of the soil bearing capacity of shallow foundations in several areas of Aceh Besar, and used as a mapping using ArcGIS 9.2 software. Secondary data used is Cone Penetration Test (CPT) ere obtained from the Laboratory of Soil Mechanics Faculty of Engineering, University of Syiah Kuala. Number of points CPT or sondir is 34 points.  Furthermore, to determine the location of these points in the field using GPS (Global Positioning System). The result shows that most of the area in the study area has a bearing capacity of the land is permitted < 50 ton / m2. The area has bearing capacity permits between 50 ton/m2 to 100 ton/m2 occupied area Siem, Cot Gue, Bilui, Adjunct, Baet, Mon Ikeun,Lamkruet, and Lhoknga. Furthermore, the results of the bearing capacity of land used as a mapping so that it becomes a reference in planning the foundation of a building or otherinfrastructure in the region of Aceh Besar.
STABILITY ANALYSIS OF EDGE RIVER LAWE LIANG PANGI AT LEUSER SUB-DISTRICT, SOUTHEAST ACEH REGENCY TOWARDS FLASH FLOOD Azmeri, Azmeri; Sundary, Devi
Inersia, Jurnal Teknik Sipil Vol 5, No 1 (2013)
Publisher : Universitas Bengkulu

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (687.556 KB) | DOI: 10.33369/ijts.5.1.72-82

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Flash flood is a process flow of heavy water and massive load concentrated is accompanied, also rock chunks, soil and logs (debris) from the upstream. Flash flood?s triggered by climatology and geological factors, landslides and natural damming at the upstream. The rising of water discharge flood process occurs suddenly and rapidly. The research in the Lawe Liang Pangi Watershed, Leuser Sub-district, Southeast Aceh Regency. Based on information, there are heavy rains occurred during the 3 days before the flood. Flooding occurred on Friday evening, August 17, 2012 at 22:00. Occured landslide at 15 locations. The most substantial damage is Naga Timbul, Suka Damae, Sepakat, Gaya Sendah, Punce Nali, and Bun-bun Indah villages. Liang Lawe Pangi watershed topography is mountainous, moderate to steep slope. The soil type is a little fine sandy silt loam and dark brown, and the soil type is erosion susceptible. The river bank stability test results for the two sampling locations, the safety factor in extreme conditions (flooding) is smaller (1,34) than the standard value (1,50). The flood conditions (inundation) is not secure against river bank scour. It is certainly more dangerous when taken by flash floods at a large velocity and followed by massive load. Recommendations for prevention and  mitigation of flash flood disasters in Leuser Sub-district, the disaster prevention and mitigation in the structural measures that to typical flood prone locations and non-structural measures including vegetation and public education work for the land management.