scholarly journals Evaluation and Monitoring of Slope Stability in Cold Region: Case Study of Man-Made Slope at Øysand, Norway

2020 ◽  
Vol 10 (12) ◽  
pp. 4136 ◽  
Author(s):  
Yunsup Shin ◽  
Jung Chan Choi ◽  
Santiago Quinteros ◽  
Ida Svendsen ◽  
Jean-Sebastien L'Heureux ◽  
...  
Keyword(s):  
Slope Stability ◽  
Warning System ◽  
Soil Parameters ◽  
Cold Region ◽  
Initial Field ◽  
Remote Monitoring System ◽  
The Road ◽  
Critical Slope ◽  
Evaluation And Monitoring

Recently, the road and railways infrastructure developments in Norway have led to renewed interests on the geotechnical challenges associated with slope stability under freezing-thawing cycles. Despite the amount of research available on the topic, there are few comprehensive studies involving laboratory testing, numerical analysis, and field monitoring of a slope during a freezing–thawing. In this case study, a critical slope was identified in a cold region based on field and laboratory tests, and a series of numerical simulations were carried out to evaluate the governing factor of slope stability using finite element methods. A remote monitoring system was installed on a real scale man-made slope to observe its behavior against the governing factors of slope stability. As a result, it was found that slope stability at the critical slope was significantly impacted by the freezing–thawing action, which was confirmed by the initial field observations from 2019 to 2020. Later, continuous monitoring data could be used to update soil parameters and to implement an early warning system for the high risky slope areas effected by freezing–thawing action in many cold regions.

scholarly journals An Improved Strength Reduction-Based Slope Stability Analysis

Geosciences ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 55 ◽  
Author(s):  
S. Seyed-Kolbadi ◽  
J. Sadoghi-Yazdi ◽  
M. Hariri-Ardebili
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Limit State ◽  
Spectral Element ◽  
Strength Reduction ◽  
Analysis Model ◽  
Weak Layer ◽  
The Road ◽  
Coulomb Failure Criterion

Slope uncertainty predominantly originates from the imperfect analysis model and the inaccuracy and imprecision of the observations. The strength reduction method (SRM) is widely used to attain the safety factor (SF) of the slopes, which is similar to interpretation of the limit state (LS). In this paper, the spectral element method (SEM), using an elasto-plastic Mohr–Coulomb failure criterion, is employed to project the plausible LS of the soil slopes. An iterative SRM search method is proposed to evaluate the SF of the slopes regardless of the LS interpretation. The proposed SRM paradigm encompasses the design trigger to trace the uncertain parameters in decision-making. This method is applied to three numerical examples: (1) a homogeneous dry slope, (2) a dry slope with a weak layer, and (3) a partially-wet slope with a weak layer. It is shown that for the case study examples, the proposed SRM reasonably converges to the required precision. Results further are compared and contrasted with some of the conventional and standard techniques in slope stability. This hybrid procedure paves the road for fast and safe stability analysis of man-made and natural slopes.

Instability and stabilization of an embankment on the Irbid–Amman Highway in Jordan

1994 ◽  
Vol 31 (6) ◽  
pp. 1015-1021 ◽  
Author(s):  
Azm S. Al-Homoud ◽  
Ahmad B. Tal ◽  
Abdallah I. Husein (Malkawi)
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Engineering Properties ◽  
Soil Parameters ◽  
Remedial Measures ◽  
Geotechnical Investigation ◽  
The Road ◽  
Landslide Zone ◽  
Time Of Failure

This paper includes a summary of a geotechnical investigation of an embankment site at station 47 + 300 along the Irbid–Amman Highway in Jordan. The embankment suffered instability problems. This study includes geological and geotechnical mapping of the study area as well as determination of the engineering properties of the various materials encountered at the site.Stability analysis is carried out for the original embankment to explain the failure mechanism, assess the condition at the time of failure, and evaluate the soil parameters for use in stability analysis of remedial measures. Stability analysis is carried out for remedial works. Recommendations are suggested to stabilize the sliding area and to repair the road traversing this landslide zone. Key words : slope stability, embankment, remediation.

scholarly journals Prediksi Daerah Rawan Longsor Pada Kawasan Pengembangan Jalan Nasional Pulau Sanana di Maluku Utara

2018 ◽  
Vol 14 (1) ◽  
pp. 47-54
Author(s):  
Pieter Kunu ◽  
Marcus Luhukay
Keyword(s):  
Slope Stability ◽  
Plant Conservation ◽  
Survey Method ◽  
Soil Parameters ◽  
The Road ◽  
Mountainous Regions ◽  
Cutting Slope ◽  
Stability Of Slopes ◽  
The Stability ◽  
National Road

Research has been conducted with the aim of mapping a potential landslide of soil that is alleged to be happening on a national road development area on the island of North Maluku Sanana island because in some locations excavations or cutting slope were conducted for build trails. Research was done by survey method, by analysis of land as well as the analysis of soil samples in the laboratory against some physical-chemical soil parameters to predict the potential for landslide of soil. The results showed that in the developed area of national roads, there were some points or locations with the potential landslide. However, by cutting slope of landslide the potential became greater, things which would be very threatening road users on the sections of the road that passes through the hilly and mountainous regions. The cutting slopes have been disturbing the equilibrium slope stability or lower slopes so the landslide is easy to happen. Mitigation efforts can be done by building a retaining structure at the foot of the slopes, the angle of the cutting slope made slightly sloping and in the upper part land use should be preserved and enriched with plant conservation to improve the stability of slopes. Keywords: a potential avalanche of soil, national road, slope stability   ABSTRAK Penelitian telah dilakukan dengan tujuan untuk memetakan potensi longsoran tanah yang diduga akan terjadi pada kawasan pengembangan jalan nasional di Pulau Sanana Maluku Utara karena di beberapa lokasi dilakukan penggalian atau pemotongan lereng untuk membangun jalur jalan. Penelitian dilakukan dengan metode survey dengan analisis lahan serta analisis sampel tanah di laboratorium terhadap beberapa parameter fisik-kimia tanah untuk memprediksi potensi longsoran tanah. Hasil penelitian menunjukkan bahwa pada kawasan ruas jalan nasional yang dikembangkan terdapat beberapa titik atau lokasi dengan potensi longsoran tergolong sedang. Namun dengan adanya pemotongan lereng maka potensi longsoran menjadi semakin besar, hal mana akan sangat mengancam pengguna jalan di ruas-ruas jalan yang melewati kawasan berbukit dan bergunung. Pemotongan lereng telah mengganggu keseimbangan lereng atau menurunkan stabilitas lereng sehingga longsoran mudah terjadi. Upaya mitigasi dapat dilakukan dengan membangun struktur penahan di kaki lereng, sudut pemotongan lereng dibuat landai dan penggunaan lahan di bagian atas lereng harus dipertahankan dan diperkayadengan tanaman konservasi untuk meningkatkan stabilitas lereng yang sudah terganggu. Kata kunci: jalan nasional, potensi longsoran tanah, stabilitas lereng

ANALISIS PENANGGULANGAN KELONGSORAN TANAH PADA RUAS JALAN GUNUNG TUGEL PATIKRAJA BANYUMAS

2017 ◽  
Vol 14 (1) ◽  
pp. 53
Author(s):  
Arwan Apriyono ◽  
Sumiyanto Sumiyanto ◽  
Nanang Gunawan Wariyatno
Keyword(s):  
Limit Equilibrium ◽  
Retaining Wall ◽  
Limit Equilibrium Method ◽  
Pile Foundations ◽  
Soil Parameters ◽  
The Road ◽  
Realistic Option ◽  
Stable Conditions ◽  
Using Data ◽  
Wall Slope

Gunung Tugel is an area that located Patikraja Region, Southern Banyumas. Thetopography of the area is mostly mountainous with a slope that varies from flat to steep. Thiscondition makes to many areas of this region potentially landslide. In 2015, a landslideoccurred in Jalan Gunung Tugel. The Landslide occurred along 70 meters on the half of theroad and causing traffic Patikraja-Purwokerto disturbed. To repair the damage of the road andavoid further landslides, necessary to analyze slope stability. This study is to analyze landslidereinforcement that occurred at Gunung Tugel and divides into 3 step. The first step is fieldinvestigation to determine the condition of the location and dimensions of landslides. Thesecond step is to know the soil parameters and analyzes data were obtained from the field. Andthe final step is analyzed of the landslide reinforcement by using data obtained from thepreceding step. In this research, will be applied three variations of reinforcement i.e. retainingwall, pile foundation and combine both of pile foundations and retaining wall. Slope stabilityanalysis was conducted using limit equilibrium method. Based on the analysis conducted onthe three variations reinforcement, combine both of pile foundations and retaining wall morerecommended. Application of and combine both of pile foundations and retaining wall is themost realistic option in consideration of ease of implementation at the field. From thecalculations have been done, in order to achieve stable conditions need retaining wall withdimensions of 2 meters high with 2,5 meters of width. DPT is supported by two piles of eachcross-section with 0.3 meters of diameter along 10 meters with 1-meter in space. Abstrak: Gunung Tugel adalah salah satu daerah yang terletak di Kecamatan PatikrajaKabupaten Banyumas bagian selatan. Kondisi topografi daerah tersebut sebagian besar berupapegunungan dengan kemiringan yang bervariasi dari landai sampai curam. Hal inimenyebabkan banyak daerah di wilayah Gunung Tugel yang berpotensi terjadi bencana tanahlongsor. Pada tahun 2015, peristiwa longsor kembali terjadi di ruas Jalan Gunung Tugel.Kelongsoran yang terjadi sepanjang 70 meter pada separuh badan jalan tersebut menyebabkanarus lalu lintas patikraja-purwokerto menjadi terganggu. Untuk memperbaiki kerusakan jalandan mencegah kelongsoran kembali, diperlukan analisis perkuatan tanah terhadap lerengtersebut. Studi analisis penanggulangan kelongsoran jalan yang terjadi di Gunung Tugel inidilakukan dengan tiga tahapan. Tahapan pertama adalah investigasi lapangan untukmengetahui kondisi lokasi dan dimensi longsor serta mengambil sampel tanah di lapangan.Tahap kedua adalah melakukan pengujian parameter tanah dan analisis data yang diperolehdari lapangan. Tahapan yang terakhir adalah analisis penanggulangan longsor denganmenggunakan data yang diperoleh dari tahapan sebelumnya. Pada penelitan ini, akanditerapkan tiga variasi perkuatan lereng yaitu dinding penahan tanah (DPT), turap dan DPTyang dikombinasikan dengan pondasi tiang. Analisis stabilitas lereng dilakukan dengan metodekeseimbangan batas. Berdasarkan hasil analisis yang dilakukan terhadap ketiga variasiperkuatan, DPT dengan kombinasi tiang pancang lebih direkomendasikan. Penerapan DPTyang dikombinasikan dengan minipile merupakan pilihan yang paling realistis denganpertimbangan tingkat kemudahan pelaksanaan di lapangan. Dari perhitungan yang telahdilakukan, untuk mencapai kondisi stabil diperlukan DPT dengan dimensi tinggi 2 meterdengan lebar bawah 2,5 meter. DPT tersebut ditopang oleh dua tiang tiap penampangmelintang dengan diameter 0,3 meter sepanjang 10 meter dengan jarak antar tiang 1 meter.kata kunci: tanah longsor, perkuatan tanah, metode keseimbangan batas

Optimales Layout einer Walderschliessung

2016 ◽  
Vol 167 (5) ◽  
pp. 294-301
Author(s):  
Leo Bont
Keyword(s):  
Road Network ◽  
Spatial Arrangement ◽  
Problem Situation ◽  
Optimal Layout ◽  
Forest Road ◽  
The Road ◽  
Network Cost ◽  
User Friendly ◽  
Short Time

Optimal layout of a forest road network The road network is the backbone of forest management. When creating or redesigning a forest road network, one important question is how to shape the layout, this means to fix the spatial arrangement and the dimensioning standard of the roads. We consider two kinds of layout problems. First, new forest road network in an area without any such development yet, and second, redesign of existing road network for actual requirements. For each problem situation, we will present a method that allows to detect automatically the optimal road and harvesting layout. The method aims to identify a road network that concurrently minimizes the harvesting cost, the road network cost (construction and maintenance) and the hauling cost over the entire life cycle. Ecological issues can be considered as well. The method will be presented and discussed with the help of two case studies. The main benefit of the application of optimization tools consists in an objective-based planning, which allows to check and compare different scenarios and objectives within a short time. The responses coming from the case study regions were highly positive: practitioners suggest to make those methods a standard practice and to further develop the prototype to a user-friendly expert software.

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