Abstract. Blasting is a process of reducing the rock fraction, but it also produces energy that is less beneficial for the surrounding environment. One of the less favorable energies is ground vibration. Soil vibration will affect slope stability. Therefore, this study was conducted to determine the effect of soil vibration on slope stability by knowing the level of safety on the slope. Analysis method trendline. The slope area analyzed was made into 6 slope geometry models with 2 different models including without taking into account blasting vibrations and modeling with blasting vibrations into account. The measurement of the blasting vibration level was carried out at 12 points. In addition to getting the value of the resistance of rock types in the research area using the shlumberger and getting the general direction of the weak plane to determine the safety factor of the slope. The results of slope stability analysis with slope geometry in 6 models that do not take into account blasting vibrations with the highest safety factor value of 9.881 and the lowest 5.029 and those that take into account blasting vibrations with the highest safety factor value 9.377 and the lowest 4.641 indicate safe conditions with a factor value safety above 1.25 in accordance with KEPMEN 1827K/MEM/30/2018, so there is no safety factor that can be recommended in this study.&#x0D; Abstrak. Kegiatan peledakan merupakan proses mengecilkan fraksi batuan, tetapi juga menghasilkan energi yang kurang menguntungkan bagi lingkungan sekitar. Salah satu energi yang kurang menguntungkan adalah getaran tanah. Getaran tanah akan mempengaruhi kestabilan lereng. Oleh karena itu adanya penelitian ini untuk mengetahui pengaruh getaran tanah terhadap kestabilan lereng dengan mengetahui tingkat keamanan pada lereng tersebut. Kajian analisis pada penilitian ini menggunakan metode analisis trendline. Pada daerah lereng yang dianalisis dibuat menjadi 6 pemodelan geometri lereng dengan 2 pemodelan yang berbeda meliputi tanpa memperhitungkan getaran peledakan dan pemodelan dengan memperhitungkan getaran peledakan. Pengukuran tingkat getaran peledakan dilakukan sebanyak 12 titik. Selain itu mendapatkan nilai tahanan jenis batuan yang ada pada daerah penelitian dengan menggunakan metode shlumberger dan mendapatkan arah umum bidang lemah untuk mengetahui faktor keamanan dari lereng tersebut. Hasil analisis kestabilan lereng dengan geometri lereng pada 6 pemodelan yang tidak memperhitungkan getaran peledakan dengan nilai faktor keamanan paling tinggi yaitu 9,881 dan yang paling rendah 5,029 dan yang memperhitungkan getaran peledakan dengan nilai faktor keamanan paling tinggi 9,377 dan paling rendah 4,641 menunjukkan kondisi aman dengan nilai faktor keamanan diatas 1,25 sesuai dengan KEPMEN 1827K/MEM/30/2018, sehingga tidak adanya faktor keamanan yang dapat direkomendasikan pada penelitian ini. 

https://journals.unisba.ac.id/index.php/JRTP/article/download/1317/935

Analisis Pengaruh Getaran Peledakan Terhadap Kestabilan Lereng pada PT. XYZ Blok Paniisan

Bendungan Cipanas merupakan bendungan type urugan kombinasi antara tanah dan batuan dengan cara menimbun sejumlah material seperti batuan, kerikil, pasir maupun tanah kedap air yang dibangun dengan kemiringan berdasarkan ketinggian tertentu, sehingga dapat menahan dan menaikan elevasi muai air di sebelah hulu (upstream). Bendungan type urugan ini (embankment) sangat mudah mengalami keruntuhan (collaps) yang disebabkan oleh akibat tekanan air di lereng udik, air pori, dan’beban gempa yang didapat maupun dari struktur bendungan sendiri, sehingga perlu diukur dengan menggunakan suatu standar yaitu Angka Keamanan. Nilai angka keamanan merupakan perbandingan gaya yang ditahan’dengan gaya yang mendorong longsoran, serta mengetahui kondisi maupun daerah yang paling kritis dan riskan terhadap keruntuhan dengan cara perhitungan manual. Metode yang dipakai dalam penelitian ini menggunakan metode Bishop dimana metode ini paling banyak dipakai dalam perhitungan manual dan mendapatkan nilai faktor aman yang mendekati hasil perhitungan dengan pendekatan berdasarkan pengamatan dilapangan. Hasil dari analisis perhitungan di dapat bahwa dari kondisi masa konstruksi sebesar 2,13 disebelah hulu dan 1,88 disebelah hilir dengan angka keamanan ijin 1,50. Kondisi muka air maksimum diperoleh sebesar 2,13 disebelah hulu dan 1,88 disebelah hilir dengan angka keamanan ijin 1,30 dan kondisi surut cepat nilai diperoleh sebesar 2,11 disebelah hulu dan 1,88 disebelah hilir dengan angka keamanan ijin 1,30. Berdasarkan hasil penelitian dari ketiga kondisi lereng, nilai factor keamanan yang stabil dan aman terhadap bahaya longsoran. Sedangkan potensi longsoran yang akan terjadi akan mengalami longsoran dengan tipe translasi dikarenakan perbedaan kuat geser dan perbedaan lapisan pada susunan timbunan pada bendungan utama.

Analisis Kestabilan Lereng Bendungan Akibat Fluktuasi Muka Air

The construction of telecommunication towers aims to improve customer service. So that advances in the field of communication and information technology can be felt by residents who are far away in remote parts of the country. The construction of this tower must be planned as well as possible, especially for areas prone to landslides because towers are usually placed in higher areas. The landslide incident at the location of the telecommunication tower in Cikeusal Village, Tasikmalaya Regency can be used as an evaluation for other areas prone to landslides. The landslide can endanger the settlements under the tower. Field investigations are carried out as a basis for making plans to overcome landslides. The analysis was performed using Plaxis 2D software. The results of the strengthening analysis after the erosion prevention were carried out (with several stage), the factor of safety was 1.805 at section B and 3,228 at section C. The recommendations are given for landslide prevention are replacing the old retaining wall with the new one gradually, adding a column in the middle of the retaining wall, adding bored piles under the retaining wall, making drain pipe on the retaining wall to accommodate water flow from the ground surface, replacing the old stairs for access roads that were affected by landslides with new stairs and made with 2 applications so that the slope of the stairs is not too steep, as well as making a foundation for the stairs. It is hoped that the landslide occurrence and the results of the analysis of slope stability in Cikeusal Village, Tasikmalaya Regency can be used as evaluation material in the construction of telecommunication towers for landslide-prone areas.

Countermeasures analysis of landslide in the cikeusal village of Tasikmalaya regency

This research is based on the issue of soil landslide in the embankment area of Cidahu - Cieurih Road. Geotechnical analysis involves cone penetration testing, boreholes, and laboratory testing to obtain soil property data. The results indicate the presence of soil layers with different characteristics, such as clay, sand, and silty clay. The analysis method utilizes PLAXIS 3D V20 for slope stability modeling. The modeling results show that the existing slope condition is unsafe, and two alternative treatments are proposed. Alternative 1 involves replacing the existing retaining wall with a new one and adding ribs, resulting in an SF of 1.516. Alternative 2 involves using the existing sheet pile with the addition of a retaining wall and embankment, resulting in an SF of 1.63. This research concludes that Alternative 2, utilizing the existing sheet pile and retaining wall, provides better slope stability results with an SF that meets safety standards.

Improvement Of Landslide Handling On Filled Land In Cidahu-Cieurih Road, Cidahu District, Kuningan Regency

On the Ende-Kelimutu national road section at STA 8+425, according to the identification and field survey, the landslide that occurred at this point was caused by high rainfall intensity and geological factors of the slope. As the road supervisor, the Balai Pelaksanaan Jalan Nasional (BPJN) of East Nusa Tenggara has designed a landslide treatment using a combination of cantilever walls and drilled poles. Soil investigation data at STA 8+425 shows that the slope is dominated by sand with N-SPT values above 15 to a depth of 14.45 meters. When making design improvements, a number of rainfall data from several weather observation stations are needed, in order to determine the effect of rainwater infiltration on the landslides that occur. This study aims to determine the influence of rainwater infiltration on the occurrence of landslides at the study site, where the results of the analysis conducted with Geostudio prove the truth. Modeling with the combination of SEEP/W and SLOPE/W, the FS value before the landslide was 2.302 and then decreased to 0.35 during the landslide. 

Slope Stability for Landslide in Road Preservation Working Packages Ende-Wolowaru and Junction-Kelimutu STA 8+425

The Aceh Tengah / Gayo Lues-Blangkejeren road segment (N.022) Km 438 + 775 is one of the Central Cross National Roads in the Province of Aceh, which often experiences landslides due to being in hilly areas. Landslides that occur in these locations are caused by scouring of road runoff, lack of optimal drainage and the absence of outlets for drainage and soil layers under asphalt pavement consisting of loose material. Therefore, a slope reinforcement study with Counterfort type retaining wall is needed. This study aims to analyze slope stability by obtaining safety factor numbers and identifying slope failure patterns. Analysis was carried out to obtain safety factors and slope failure patterns by using 2D Plaxis and slice methods. The calculation of safety factors for Counterfort type retaining walls is done manually. The input soil parameters used are dry volume weight (gd), wet volume weight (gw), permeability (k), modulus young (Eref), paisson's ratio (υ), shear angle (f), cohesion (c) . The results of slope stability analysis on the existing conditions using the Plaxis program and the slice method with radius (r) 65.06 meters found that safety factors were 1.038 and 1.079 with unsafe slope conditions (FK 1.5). ABSTRAK Ruas jalan batas Aceh Tengah/Gayo Lues-Blangkejeren (N.022) Km 438+775 merupakan salah satu ruas jalan Nasional Lintas Tengah Provinsi Aceh, yang sering mengalami terjadi tanah longsor karena berada di daerah perbukitan. Longsoran yang terjadi pada lokasi tersebut disebabkan oleh gerusan air limpasan permukaan jalan, kurang optimalnya drainase dan tidak adanya outlet untuk pembuangan air serta lapisan tanah di bawah perkerasan aspal terdiri dari material lepas. Oleh karena itu, diperlukan kajian perkuatan lereng dengan dinding penahan tanah tipe Counterfort . Kajian ini bertujuan untuk menganalisis stabilitas lereng dengan mendapatkan angka faktor keamanan dan mengidentifikasi pola keruntuhan lereng. Analisis dilakukan untuk mendapatkan faktor keamanan dan pola keruntuhan lereng yaitu dengan menggunakan program Plaxis 2D dan metode irisan. Perhitungan faktor keamanan untuk dinding penahan tanah tipe Counterfort dilakukan secara manual. Adapun parameter  tanah input yang digunakan adalah berat volume kering (g d ), berat volume basah (g w ), permeabilitas (k), modulus young (E ref ), paisson’s rasio (υ), sudut geser (f), kohesi (c). Hasil analisis stabilitas lereng pada kondisi eksisting menggunakan program Plaxis dan metode irisan dengan jari-jari (r) 65,06 meter didapatkan akan faktor keamanan sebesar 1,038 dan 1,079 dengan kondisi lereng tidak aman (FK 1,5). Kata kunci : l ongsoran ; c ounterfort ; p laxis 2D ; f aktor k eamanan.

/pdf/faktor-keamanan-stabilitas-lereng-pada-kondisi-eksisting-dan-f4bhugjon7.pdf

Faktor Keamanan Stabilitas Lereng pada Kondisi Eksisting dan Setelah Diperkuat Dinding Penahan Tanah Tipe Counterfort dengan Program Plaxis

Continuous heavy rain on the slopes and some large tree roots that do not penetrate the slip surface can lead to progressive failure of landslide slopes. This is due to the large trees located at the top and the middle of the landslide area can reduce the stability of the slope. Various factors such as mechanics and hydrology in determining slope stability need to be considered. The phenomenon and mechanism of bamboo tree factors that lie below the slopes as the focus of research on root tensile strength of root-soil interacting. This study aims to determine the pull force and tensile strength due to root-soil interaction to the contribution of shear strength in the lower slopes. Field testing uses the root pull method by observing the diameter and number of roots. The test was performed with a tripod device equipped with strain gauge as a recording instrument on saturated soil conditions. The soil samples were taken from the study site to test the physical and mechanical properties of the soil. The result of the test shows that the soil type at the research location is inorganic silt. The results showed that the root pull force increased significantly against the increase in the number and diameter of the roots. In contrast, the tensile strength of roots in any land area decreases with increasing number of roots. Based on the graph shows that the number of roots more than five began not significant to tensile strength. Apparently, bamboo roots are dense and spread below the slopes, then the tensile strength of the roots that interact with the soil begins to stabilize. The tensile strength of the bamboo root results in additional cohesion values Keywords : root tensile strength, cohesion addition, soil shear strength Abstrak : Hujan lebat yang berkelanjutan pada lereng dan sebagian akar-akar pohon besar yang tidak menembus bidang longsor ( slip surface ) dapat menyebabkan terjadinya kegagalan progresif terhadap longsoran lereng tanah. Hal ini, disebabkan karena pohon besar yang terletak di bagian atas dan tengah bidang longsor dapat mengurangi stabilitas lereng. Berbagai faktor  seperti mekanika dan hidrologi dalam menentukan stabilitas lereng perlu dipertimbangkan. Fenomena dan mekanisme faktor pohon bambu yang berada di bawah lereng sebagai fokus penelitian mengenai kekuatan tarik akar yang berinteraksi akar-tanah. Penelitian ini bertujuan untuk menentukan gaya cabut dan kekuatan tarik akibat interaksi akar-tanah terhadap kontribusi kuat geser di lereng bagian bawah. Pengujian di lapangan menggunakan metode gaya cabut akar dengan mengamati variabel diameter dan jumlah akar. Pengujian dilakukan dengan alat tripod yang dilengkapi strain gauge sebagai instrumen pencatat pada kondisi tanah jenuh. Sampel tanah diambil dari lokasi penelitian untuk dilakukan pengujian sifat fisis dan mekanis tanah. Hasil penegujian menunjukan bahwa jenis tanah pada lokasi penelitian adalah lanau anorganik. Hasil penelitian menunjukan bahwa  gaya cabut akar meningkat sangat signifikan terhadap pertambahan jumlah dan diameter akar. Sebaliknya, kekuatan tarik akar dalam setiap luasan tanah menurun seiring bertambah jumlah akar. Berdasarkan grafik menunjukan bahwa jumlah akar lebih dari lima mulai tidak signifikan terhadap kekuatan tarik. Ternyata, perakaran bambu yang padat dan penyebaran di bawah lereng, maka kekuatan tarik akar yang berinteraksi dengan tanah mulai stabil. Kekuatan tarik akar bambu menghasilkan nilai kohesi tambahan kepada kuat geser akibat interaksi dengan tanah terhadap stabilitas di bawah lereng. Kata kunci : kekuatan tarik akar, kohesi tambahan, kuat geser tanah

/pdf/pengaruh-kekuatan-tarik-akar-bambu-pada-kontribusi-kuat-4ed8no8t0t.pdf

Pengaruh kekuatan tarik akar bambu pada kontribusi kuat geser tanah terhadap stabilitas lereng

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Faktor Keamanan Stabilitas Lereng pada Kondisi Eksisting dan Setelah Diperkuat Dinding Penahan Tanah Tipe Counterfort dengan Program Plaxis

Pengaruh kekuatan tarik akar bambu pada kontribusi kuat geser tanah terhadap stabilitas lereng