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ARY SISMIANI
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PENERAPAN METODE FELLENIUS PADA TANAH LEMPUNG KELANAUAN ANORGANIK (Studi Kasus di Desa Cirahab) ARY SISMIANI; IWAN RUSTENDI
Teodolita: Media Komunkasi Ilmiah di Bidang Teknik Vol 22, No 2 (2021): Teodolita : Media Komunikasi Ilmiah Di Bidang Teknik
Publisher : Fakultas Teknik, Universitas Wijayakusuma Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53810/jt.v22i2.423

Abstract

Abstrak Tanah Lempung kelanauan anorganik dengan klasifikasi CL adalah tanah lempung yang ada di desa Cirahab. Sebagai desa dengan kondisi rawan gerakan tanah, maka perlu dikaji tentang kemungkinan terjadinya longsor. Penyebab utama longsor atau keruntuhan lereng adalah menurunnya kuat geser pada bidang longsor atau meningkatnya tegangan geser. Metode Fellenius adalah metode yang dipakai utntuk menganalisis kestabilan lereng yaitu untuk menentukan faktor aman dari bidang longsor yang potensial. Berdasarkan hasil analisis yang dilakukan di desa Cirahab didapat nilai Faktor Keamanan yang bervariasi dengan tiga kondisi kadar air yaitu Fk = 1.3 ; Fk = 1,19 dan Fk = 0,95 . Pada kondisi ketiga, nilai faktor keamanan berada dalam ambang batas aman, sehingga kondisi lereng yang aman tersebut harus dipertahankan. Kata kunci : Tanah Lempung Kelanauan, Metode Felenius, Faktor Aman
STUDI PERUBAHAN MORFOLOGI SUNGAI SERAYU HILIR AKIBAT DEBIT BANJIR Novi Andhi Setyo Purwono; Ary Sismiani
Teodolita ( Media Komunikasi Ilmiah di Bidang Teknik ) Vol 19, No 1 (2018): Teodolita
Publisher : Fakultas Teknik Universitas Wijayakusuma Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53810/jt.v19i1.269

Abstract

The Serayu River Basin (DAS) is one of the watersheds in Serayu Bogowonto River, the problems that occur in the river channel is the degradation and erosion of river cliffs in recent years. Degradation anderosion of the cliffs resulted in sediment movement within the river channel so that attention needs to betaken to control the destructive power of water in the land around the river and in the river channel.Alluvial river stability is said to be in stable condition or to achieve balance if there are temporary or nonpermanent changes in the medium term.Result of simulation of hydrodynamic behavior of serayu river with constant flood discharge when repeated10 years some locations have erosion and some locations have deposition. The rate of erosion andsedimentation for each Bench Mark is different depending on the position on the outer corner, inner bend,or on a straight groove. Given the phenomenon of some areas that are in the rivers serayu erosion. It isnecessary to immediately do the handling by making a cliff reinforcement or by making a crib to direct thecurrent to the middle so as not to erode the right and left bank of the riverKeywords : river morphology, serayu river, numerical analysi
STUDI PENDAHULUAN BATUBARA DI DESA GUNUNGSARI KECAMATAN SEGAH KABUPATEN BERAU KALIMANTAN TIMUR ARY SISMIANI
Teodolita: Media Komunkasi Ilmiah di Bidang Teknik Vol 21, No 2 (2020): Teodolita : Media Komunikasi Ilmiah Di Bidang Teknik
Publisher : Fakultas Teknik, Universitas Wijayakusuma Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53810/jt.v21i2.367

Abstract

AbstrakBatubara merupakan bahan galian strategis yang menjadi salah satu sumberdaya energi nasional bernilai ekonomis. Informasi mengenai sumberdaya serta besar cadangannya menjadi tujuan yang mendasar dalam merencanakan kebijaksanaan dibidang energi nasional, Oleh karena itu penyelidikan pendahuluan sangat penting dilakukan. Kegiatan Penyelidikan Pendahuluan Batubara ini dilaksanakan di area seluas 4.633 ha dan dimaksudkan untuk mengetahui dan memastikan ada tidaknya endapan batubara di daerah tersebut. Dari  penyelidikan didapatkan hasil sebagai berikut : Pencapaian daerah untuk survey relatif mudah,secara fisik kualitas cukup baik yaitu  warna coklat kehitaman - hitam, britel, agak keras-keras, gores hitam, cleat agak rapat, kilap kaca-kusam, pecahan sub konkoidal, pengotor oksida besi, pirit ukuran halus, lempung dan sulfur. Dari 7 singkapan batubara yang dijumpai, yang diambil sebagai sampel untuk uji laboratorium adalah sebanyak 5 sampel. Berdasarkan  hasil uji laboratorium diperoleh nilai kalori SGH-02 dan SGH-03 (seam B) yaitu 6759 - 7007 cal/g,SGH-05 dan SGH-06 (seam A) yaitu 4119 - 4319 cal/g, SGH-07 (seam C) yaitu 7482 cal/g. Terdapat 3 seam batubara yang signifikan dengan tebal masing–masing seam berkisar 0.55 m hingga 1.15 m. Seam A ketebalan 0.65 – 0.97 meter (lignit), Seam B ketebalan 0.55 – 1.15 meter (sub bituminous), Seam C ketebalan 0.70 meter (sub bituminous). Kata kunci : Penyelidikan, Batubara, Seam    AbstractCoal is a strategic mineral that is one of the national energy resources with economic value. Information regarding resources and the size of their reserves is a fundamental objective in planning policies in the national energy sector, therefore a preliminary investigation is very important. This Preliminary Coal Investigation Activity was carried out in an area of 4,633 ha and was intended to determine and confirm the presence or absence of coal deposits in the area. From the investigation, the following results were obtained: The achievement of the area for the survey is relatively easy, physically the quality is quite good, namely blackish brown color - black, british, a little hard, black scratches, the cleat is rather tight, the glossy-glass is dull, sub-concoidal fragments, impurities iron oxide, fine pyrite, clay and sulfur. Of the 7 coal outcrops found, 5 samples were taken for laboratory test. Based on the results of laboratory test, the caloric values of SGH-02 and SGH-03 (seam B), namely 6759 - 7007 cal / g,SGH-05 and SGH-06 (seam A) were 4119 - 4319 cal / g, SGH-07 (seam C) namely 7482 cal / g. There are 3 significant coal seams, each with a thickness ranging from 0.55 m to 1.15 m. Seam A with a thickness of 0.65 - 0.97 meters (lignite), Seam B with a thickness of 0.55 - 1.15 meters (sub bituminous), Seam C with a thickness of 0.70 meters (sub bituminous). Keywords: Investigation, Coal, Seam 
ANALYSIS OF CBR VALUE ON CLAYSILT SOIL DUE TO THE EFFECT Analisis Nilai CBR Pada Tanah Claysilt ... OF WATER CONTENT CHANGE Ary Sismiani; Novi Andhi Setyo Purwono
Teodolita ( Media Komunikasi Ilmiah di Bidang Teknik ) Vol 20, No 1 (2019): Teodolita
Publisher : Fakultas Teknik Universitas Wijayakusuma Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (814.393 KB) | DOI: 10.53810/jt.v20i1.296

Abstract

Claysilt is a soil that has its own uniqueness, in conditions that are too dry or too saturated, the soilwill experience weakening or reduction in shear strength. Claysilt which is positioned as subgrade in a roadconstruction project, needs to be reviewed about the size of CBR that meets the requirements for this soil.There are 4 variations of the test material used in this study, namely at the water content of 20.13%, 30.04%,40.69% and 50.50%. Then the physical and mechanical properties of the soil were tested which includeddirect shear test and CBR test. From the results of the direct shear test, the internal cohesion and frictionangles obtained as follows: cohesion value 0.28 kg / cm2, 0.58 kg / cm2, 0.35 kg / cm,while the friction angle internal soil 23.76º, 22.57º, 15.96º, and 14.82º, with a CBR value of 9.36%, 6.59%,2.77%, and 1.73%. Thus it can be concluded that water content has a very large influence on CBR values.Therefore it is necessary to make an effort to maintain or reduce excess soil water content by reducing excesspore pressure, because at higher water levels it will cause soil The claysilt decreases the shear strengthwhich is indicated by the smaller internal friction angle and the CBR value.Keywords: claysilt, water content, shear strength, CBRABSTRAKClaysilt adalah tanah yang mempunyai keunikan tersendiri, dalam kondisi terlampau kering atauterlampau jenuh, tanah akan mengalami perlemahan atau pengurangan pada kuat gesernya. Tanah claysiltyang berposisi sebagai tanah dasar pada proyek pembangunan jalan, perlu ditinjau tentang besarnya nilaiCBR yang memenuhi syarat untuk tanah ini.. Ada  4 variasi benda uji  yang digunakan pada penelitian ini,yaitu pada kadar air 20.13%, 30.04%, 40.69% dan 50.50%.  Selanjutnya dilakukan uji sifat fisis dan mekanistanah yang meliputi uji geser langsung dan uji CBR. Dari hasil uji geser langsung didapatkan nilai kohesi dansudut gesek internal sebagai berikut : nilai kohesi 0,28 kg/cm2, 0,58 kg/cm2, 0,35 kg/cm2, dan, 0,30 kg/cm2,sedangkan sudut gesek internal tanah 23.76º,  22.57º, 15.96º, dan 14.82º, dengan nilai CBR sebesar 9.36% ,6.59%, 2.77%,  dan 1,73%. Dengan demikian dapat disimpulkan bahwa kadar air mempunyai pengaruh yangsangat besar terhadap nilai CBR.. Oleh karena itu perlu suatu upaya untuk mempertahankan atau mengurangikadar air tanah yang berlebih dengan cara mengurangi ekses tekanan air pori, sebab pada kadar air yangmakin tinggi akan menyebabkan tanah claysilt tersebut mengalami penurunan kuat geser yang ditandaidengan makin kecilnya sudut gesek internal dan nilai CBR nya.Kata kunci : claysilt, kadar air, kuat geser, CBR2, and 0.30 kg / cm2
ANALISIS SIFAT TEKNIS TANAH TIMBUNAN DI JALAN TOL SEMARANG - SOLO KM 22+300 Ary Sismiani
Teodolita: Media Komunkasi Ilmiah di Bidang Teknik Vol 21, No 1 (2020): Teodolita : Media Komunikasi Ilmiah Di Bidang Teknik
Publisher : Fakultas Teknik, Universitas Wijayakusuma Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (839.829 KB) | DOI: 10.53810/jt.v21i1.333

Abstract

The city of Semarang is geographically located at coordinates 110 ° 16 '20 "- 110 ° 30 '29" EastLongitude and 6 ° 55 '34 "- 7 ° 07 '04" South Latitude, has rapid progress in the field of development inall fields, one of them is the construction of a toll road that connects Semarang-Solo with a total lengthof 75.7 km.In the Semarang-Solo toll road construction project km 22+300, the landfill is a fairly highpile that is around 20 meters. The technical characteristic of the landfill largely determines the handlingof the behavior of the heap itself, so it is necessary to analyze the technical characteristic of the landfill.Laboratory tests were carried out with four (4) water content conditions namely 14.41% , 25.21% ,35.52% and 50.64%. The water content test, spesific gravity, the consistensy limit produces : w =50.66%, Gs = 2.60,  LL = 76.57% , PI = 26.73%. Whereas the direct shear test of four water content conditions resulted in cohesion value 0.21 kg/cm2, 0.58 kg/cmAnalisis Sifat Teknis Tanah Timbunan di Jalan Tol Semarang - Solo … 2, 0.48 kg/cm2 and 0.29 kg/cm , and thenternal friction angle of soil 26.45°, 22.36°, 17.76° andd 15.99°. While the maximum shear stress valueis located at 25.21% water content (Sr = 40.76%), namely: 0.68 kg / cm2, 0.78 kg / cm.Keywords : Landfill, technical characteristic Abstrak Kota Semarang yang secara geografis terletak pada koordinat 110°16’20” - 110°30’29” Bujur Timur dan6°55’34” - 7°07’04” Lintang Selatan, mempunyai kemajuan yang pesat di bidang pembangunan di segalabidang,salah satumya adalah pembangunan jalan tol yang menghubungkan antara Semarang-Solo denganpanjang total 75.7 km. Pada proyek pembangunan jalan tol Semarang-Solo km 22+300, tanah timbunanmerupakan timbunan yang cukup tinggi yaitu berkisar 20 meter. Sifat teknis tanah timbunan sangatmenentukan penanganan terhadap perilaku timbunan itu sendiri, sehingga perlu dilakukan analisisterhadap sifat teknis dari tanah timbunan tersebut. Uji laboratorium dilakukan dengan empat (4) kondisikadar air yaitu 14.41% , 25.21% , 35.52% dan 50.64%. Uji kadar air, gravitas khus , batas konsistensimenghasilkan : w = 50.66%, Gs =- 2.60, LL = 76.57%, PI = 26.73%. Sedangkan uji geser langsung padakondisi empat kadar air berturut-turut menghasilkan nilai nilai kohesi 0,21 kg/cm2, 0,48kg/cm 2 , dan, 0,29 kg/cm 2, dan  sudut gesek internal tanah 26.45º,  22.36º, 17.76º, dan 15.99º. Sedangkannilai tegangan geser maksimum terletak pada kadar air 25.21% (Sr22, 0.99 kg / cm, 0,58 kg/cm = 40.76%) yaitu : 0.68 kg/cm, 0.78kg/cm2, 0.99 kg/cm2.Kata Kunci : Tanah timbunan, sifat teknis
Peramalan Kejadian Gelombang Pantai Watunohu Dengan Pendekatan Empiris Analisa Data Angin Novi Andhi Setyo Purwono; Ary Sismiani
Teodolita ( Media Komunikasi Ilmiah di Bidang Teknik ) Vol 19, No 2 (2018): Teodolita
Publisher : Fakultas Teknik Universitas Wijayakusuma Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53810/jt.v19i2.262

Abstract

waves due to the generation process can be divided into waves that occur as a result of wind waves andtides waves.Wave energy is one form of energy that can form the coast, causing longshore current andlongshore transport in a perpendicular direction and along the coast, and causing forces acting on portbuildings. For planning purposes, wave data is required at long intervals of at least 5 years and betterwave data for 10 years. Long wave data is very difficult to obtain in the field, one method of approach toobtaining long wave data is by processing wind data obtained from the Meteorology, Climatology andGeophysics Department.Utilization of sea transportation by using the facilities of ships, ports, docks andbuildings as well as marine facilities that support it, needs to be planned, especially regarding thecondition of coastal and offshore. To support port planning and coastal structure, hydrooseanographicdata is needed including wave data in the field with long time intervals. For this reason, it is necessary toanalyze wave data forecasting using wind data from the nearest wind stationThe results showed the conversion of wind speed and direction into height, period and direction of waves inWatunohu waters in 2003-2013. The maximum significant wave height in Watunohu waters occurred in2011 and 2013 is 5.49 meters. The maximum significant wave period in Watunohu waters occurred in 2011and 2013 is 9.05 seconds.Based on statistical analysis probability with return methods of wave heightevents, wave heights can occur or exceed of the Watuhono Port area for a 10-year return period are 3.91meters to 4.39 meters. The results of this wave height forecasting can be used as a basis for calculating theport dock elevationKeywords : Waves Analysis, Fetch, WatunohuABSTRAKGelombang di laut akibat proses pembangkitannya dapat dibagi menjadi gelombang yang terjadi akibatdibangkitkan oleh angin dan gelombang yang dibangkitkan oleh pasang surut. Energi gelombang merupakansalah satu bentuk energi yang dapat membentuk pantai, menimbulkan arus dan transpor sedimen dalam arahtegak lurus dan sepanjang pantai, serta menyebabkan gaya-gaya yang bekerja pada bangunan pelabuhan.Untuk keperluan perencanaan diperlukan data gelombang dalam interval yang panjang minimal 5 tahun danlebih bagus lagi data gelombang selama 10 tahun. Data gelombang yang cukup panjang sangat sulitdiperoleh di lapangan, salah satu metode pendekatan untuk mendapatkan data gelombang yang panjangadalah dengan mengolah data angin yang diperoleh dari Badan Meteorologi, Klimatologi dan Geofisika.Pemanfaatan transportasi laut dengan menggunakan fasilitas kapal, pelabuhan, dermaga dan bangunan sertafasilitas laut yang mendukungnya, perlu direncanakan dengan baik terutama terkait kondisi perairan pantaidan lepas pantai. Untuk mendukung perencanaan pelabuhan dan bangunan pengaman pantai, dibutuhkandata hidrooseanografi diantaranya adalah data gelombang di lapangan dengan interval waktu yang panjang.Untuk itu diperlukan analisis peramalan data gelombang dengan menggunakan data angin dari stasiunpencacatan angin terdekat.Hasil penelitian menunjukankonversi kecepatan dan arah angin menjadi tinggi, periode dan arahgelombang di perairan Watunohu Tahun 2003-2013. Tinggi gelombang signifikan maksimum di perairanWatunohu terjadi pada tahun 2011 dan 2013 dengan tinggi gelombang 5,49 meter. Periode gelombangsignifikan maksimum di perairan Watunohu terjadi pada tahun 2011 dan 2013 dengan periode gelombang9,05 detik. Berdasarkan analisa statistik dengan metode kala ulang kejadian tinggi gelombang, tinggigelombang dapat terjadi atau terlampaui pada perairan Pelabuhan Watuhono untuk kala ulang 10 tahunadalah 3,91 meter sampai dengan 4,39 meter. Hasil peramalan tinggi gelombang ini dapat digunakansebagai dasar perhitungan dalam menentukan elevasi dermaga pelabuhan.Kata kunci : Peramalan Gelombang, Fetch, Watunohu.
DESIGN ANALYSIS OF EXCAVATION IN LIMESTONE QUARRIES IN REDISARI VILLAGE, ROWOKELE SUBDISTRICT, KEBUMEN DISTRICT, CENTRAL JAVA PROVINCE Ary Sismiani; Novi Andhi Setyo Purwono
Teodolita ( Media Komunikasi Ilmiah di Bidang Teknik ) Vol 20, No 2 (2019): Teodolita
Publisher : Fakultas Teknik Universitas Wijayakusuma Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1513.862 KB) | DOI: 10.53810/jt.v20i2.302

Abstract

Redisari is a village located in Rowokele Sub-District, Kebumen District, Central Java. Located about 35km to the west, which is the border area between the districts of Kebumen, Banyumas and Banjarnegara. Inthis village, many limestone deposits are found, which are tertiary rocks with fan structures. With thecondition of the area consisting of these limestone deposits, the village of Redisari has the potential to be alimestone producing village. The existence of a community mine that has been running provides ideas forresearchers to participate in designing the design of excavation or mining in the first five years. From themine plan design results using the Surpac program, five designs were obtained with each volume asfollows: year 1 = 276,625 m3, year 2 = 276,825 m3, year 3 = 272,475 m3, year 4 = 278,400 m3, year 5 = 280,650 m3. The mine design at the end of year 5 is as follows: slope angle = 70, mine slope = 12%, levelheight = 10 meters and width width = 10 meters, with Safety Factor1.625. Whereas the value of safetyfactors at the end of the first year up to the end of the 5th year in a row is as follows:1.601 ; 1.589 ; 1.583 ;1.579 ; 1.577.Keywords: Mine Design, Limestone, Volume, Safety Factor of BenchABSTRAK Redisari adalah salah satu desa yang terletak di Kecamatan Rowokele Kabupaten Kebumen  Jawa Tengah.Terletak sekitar 35 km ke arah barat yang merupakan wilayah perbatasan antara Kabupaten Kebumen,Banyumas dan Banjarnegara. Di desa ini baanyak dijumpai adanya endapan batugamping, yang merupakanendapan batuan tersier dengan struktur kipas. Dengan kondisi wilayah yang terdiri dari endapanbatugamping ini, maka desa Redisari berpotensi sebagai desa penghasil batugamping. Adanya tambangrakyat yang sudah berjalan memberikan ide bagi peneliti untuk berperan serta merancang desain penggalianatau penambangan pada lima tahun pertama. Dari hasil perencanaan desain tambang dengan menggunakanprogram Surpac didapatkan lima buah desain dengan masing-masing volume sebagai berikut : akhir tahunke-1 = 276,625 m3,akhir  tahun ke-2 = 276,825 m3, akhir  tahun ke-3 = 272,475 m3, akhir  tahun ke-4 =278,400 m3, tahun ke-5 = 280,650 m3. Desain tambang pada awal tahun ke-1 adalah sebagai berikut : sudutkemiringan lereng = 70, kemiringan jalan tambang = 12%, tinggi jenjang = 10 meter dan lebar jenjang = 10 meter, dengan nilai Faktor Keamanan adalah 1.625. Sedangkan nilai Faktor Keamanan lereng  padaakhir tahun ke-1 sampai dengan akhir tahun ke-5 berturut-turut adalah sebagai berikut : 1.601; 1.589; 1.583; 1.579; 1.577.Kata kunci : Desain Tambang, Batugamping, Volume, Faktor Keamanan lereng 
Analisa Model Matematik Arus Sejajar Pantai Pada Groin Seri Permeable Adi Surya Pria Pranata; Novi Andhi Setyo Purwono; Ary Sismiani
Techno (Jurnal Fakultas Teknik, Universitas Muhammadiyah Purwokerto) Vol 19, No 2 (2018): Techno Volume 19 No.2 Oktober 2018
Publisher : Universitas Muhammadiyah Purwokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30595/techno.v19i2.3173

Abstract

This research is the mathematical model has been made with two groins, permeable and impermeable groins, with the variation is in length and distance; 50 meters, 100 meters, 150 meters and 200 meters. A modelling has been done by using the data of physical modeling study by Chen., et al, 2003, and used as input to the simulation of mathematical models using 2D Boussinesq software.Results of the research showed the influence of variation model long distance between the groins, the reduction of longshore current velocity along the coast with an average 59.21% reduction for the double permeable groin with 50 meters long, 76.02% for 100 meters, 79.50% for 150 meters, 80.49% for 200 meters. The reduction of longshore current velocity along the coast are 57.42% for an impermeable groin groin double with 50 meters, 84.61% for 100 meters, 150% for 88.89 meters, and 89.91% for 200 meters. The distance variation between one groin to the other groin has a result that a longer permeable or impermeable groin affects the reduction longshore current velocity along the coast of the Surf Zone with the addition of longshore current velocity reduction occurs along the coast up to 20%. Reduction of longshore current velocity along the coast by the permeable and impermeable groin Permeable and impermeable groins has not been significantly occured in the long-term groin area exceeding Surf zone with an average additional reduction up to 5%. The longshore current velocity approaching the speed of currents along the coast for the existing conditions at a distance up to 2.4 times of length of groins. And the distance between the groins are too close if we compare to the long groins causing the current direction of movement towards the sea (rip Current). 
Co-Authors Adi Surya Pria Pranata Iwan Rustendi Novi Andhi Setyo Purwono