scholarly journals Monitoring Technique Using a Vision-based Single-Camera System for Reinforced Soil Retaining Wall

2020 ◽  
Vol 20 (6) ◽  
pp. 209-219
Author(s):  
Yongsoo Ha ◽  
Gichul Kweon ◽  
Yuntae Kim
Keyword(s):  
Feature Matching ◽  
Retaining Wall ◽  
Reinforced Soil ◽  
Structural Safety ◽  
Wall Structure ◽  
Single Camera ◽  
Optimal Method ◽  
Camera System ◽  
Perspective Image ◽  
The Stability

Reinforced soil retaining walls are widely applied, and their frequency of collapse increases along with their use. Safety inspections are regularly conducted to ensure the structural safety of such walls. However, unexpected collapses occur for different reasons, such as design and construction problems, maintenance issues, and natural disasters including intensive rainfall. In this study, a single-camera system is proposed to evaluate the behavior of a retaining wall based on a single-perspective image. Various feature matching methods were compared to determine the optimal method for monitoring the retaining wall structure. The behaviors of the retaining wall structure were analyzed using the optimal method. The results indicate that the KAZE method provides the best results for monitoring the behaviors of a retaining wall, with errors ranging from 0.03% to 7.37%. The proposed single-camera system is widely used to evaluate the stability of a structure with high accuracy.

scholarly journals Contribution of suction on the stability of reinforced-soil retaining wall

2018 ◽  
Vol 195 ◽  
pp. 03004
Author(s):  
Nurly Gofar ◽  
Hanafiah
Keyword(s):  
Stability Analysis ◽  
Retaining Wall ◽  
Design Guidelines ◽  
Reinforced Soil ◽  
Cohesionless Soil ◽  
Numerical Studies ◽  
Local Soil ◽  
Apparent Cohesion ◽  
The Stability ◽  
Unsaturated Condition

Existing design methods of a reinforced-soil retaining wall were established for walls with cohesionless soil backfill. However, local soil has been used widely in the construction of such a wall for economic reasons. Laboratory and numerical studies have pointed out the merit of using cohesive backfill in association with geosynthetic reinforcement. Since the compacted soil was in an unsaturated condition during the construction of the reinforced wall, the apparent cohesion derived from both soil mineralogy and suction could contribute to the stability of the wall. This paper considers methods to include the suction contribution to the existing design guidelines based on slope stability analysis, i.e. simplified method and simplified stiffness method. The analyses were carried out on a case study of geosynthetics reinforced soil retaining wall. Results show that the contribution of suction as part of cohesion existing in the cohesive backfill could be considered for the stability analysis of reinforced soil retaining walls using the available design guidelines.

Reliability Analysis on Stability of Retaining Wall

2011 ◽  
Vol 368-373 ◽  
pp. 1213-1216
Author(s):  
Qing Guo Li
Keyword(s):  
Reliability Analysis ◽  
Reliability Index ◽  
Retaining Wall ◽  
Reference Value ◽  
Calculation Model ◽  
Wall Structure ◽  
Structure Reliability ◽  
Reliability Calculation ◽  
Geotechnical Mechanics ◽  
The Stability

The retaining wall structure reliability calculation model was established by identifying the stability reliability analysis function of retaining wall according to the geotechnical mechanics parameters’ interval characteristic. The method in this paper has been applied to the engineering examples, the results shows it is reasonable and practicable. The influence of geotechnical mechanics parameters on the retaining wall stability reliability index that was discussed in this paper has a certain reference value for engineering.

Optimization of High Concrete Retaining Wall Structure

2013 ◽  
Vol 357-360 ◽  
pp. 597-603
Author(s):  
Su Yang Gao ◽  
Yan Chen ◽  
Yao Feng Xie ◽  
Wen Dong Lei ◽  
Kai Yin
Keyword(s):  
Cross Section ◽  
Optimization Design ◽  
Retaining Wall ◽  
Cross Sectional Area ◽  
Wall Structure ◽  
Sectional Area ◽  
Cross Sectional ◽  
Structure Selection ◽  
Great Height ◽  
The Stability

The height of vertical pier retaining wall is relatively larger in regions with great height of water. As the retaining wall becomes higher, the cross-sectional area of ordinary gravity pier structure becomes larger and foundation strength needs to be larger, thus there are some restrictions for traditional structure form. This research focuses on new structure forms of high concrete retaining wall and its optimization design for piers in regions with great height of water. This study establishes a nonlinear constrained mathematical model of pier high retaining wall structures. The objective function is cross-sectional area of the pier retaining wall which is restricted by the stability, bearing capacity of foundation and strength of cross-section of retaining wall. This model is solved by fmincon function from Matlab and the results present an economically reasonable cross-section form. This new selection is greatly significant to improve the stability of high concrete retaining wall and reduce the project cost. The new structure is successfully used in a port of Huaihe River and it can be a solution to pier structure selection problem in regions with great height of water in the future.

scholarly journals STRUKTUR DINDING PELINDUNG LERENG DENGAN METODE KAKI BELALANG TIRUAN

Teras Jurnal ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 11
Author(s):  
Sulardi Sulardi
Keyword(s):  
Research Method ◽  
Flood Control ◽  
Retaining Wall ◽  
Point Contact ◽  
Wall Structure ◽  
Success Story ◽  
Ground Anchors ◽  
Drainage Channels ◽  
The Stability ◽  
Protective Structures

<p class="11daftarpustaka">Tujuan penelitian adalah untuik memberikan gambaran tentang spesifikasi, bentuk, dimensi dan konfigurasi struktur dinding pelindung tanah dengan metode kaki belalang serta metode pelaksanaannya di lapangan. Metode penelitian ini menggunakan metode penelitian terpakai dan penelitian ini sekaligus sebagai technical notes success story aplikasi struktur pelindung lereng dengan metode kaki belalang tiruan pada pembangunan reservoir pengendali banjir di kota Balikpapan. Hasil penelitian menunjukan, metode kerja pemasangan struktur dinding pelindung lereng dengan metode kaki belalang tiruan dapat diaplikasikan dengan baik dan aman tanpa terjadi incident. Stabilitas dinding penahan lereng ini terletak pada penggunaan pondasi jenis paku dibagian bawah, pasangan tapak-tapak penumpu dinding pelindung lereng, ground anchor dan pasangan saluran drainase.      </p><p class="11daftarpustaka"> </p><p class="11daftarpustaka">Kata kunci:<em> dinding pelindung lereng, kaki belalang, three point contact.</em><em></em></p><p><em> </em></p><p><em> </em></p><p align="center"><strong>Abstract</strong></p><p class="11daftarpustaka"> </p><p>The research objective is to provide an overview of the specifications, shape, dimensions and configuration of the structure of the protective walls of the land with the method of grasshopper and its method of implementation in the field. This research method used the used research method and this study as well as a technical notes success story application of slope protective structures with artificial grasshopper foot method in the construction of flood control reservoirs in the city of Balikpapan. The results showed that the working method of the installation of a slope protective wall structure with artificial grasshopper foot method can be applied properly and safely without incident. The stability of the slope retaining wall lies in the use of nail type foundations at the bottom, pairs of tread supporting walls, ground anchors and pair of drainage channels.</p><p> </p><p>Keywords: <em>protective slope walls, grasshopper feet, three point contact.</em><em></em></p>

scholarly journals ANALISIS STABILITAS BACK-TO-BACK MECHANICALLY STABILIZED EARTH WALLS (STUDI KASUS JALAN LAYANG DI SULAWESI SELATAN)

2021 ◽  
Vol 4 (3) ◽  
pp. 657
Author(s):  
Yordan Salim ◽  
Andryan Suhendra
Keyword(s):  
Safety Factor ◽  
Urban Areas ◽  
Retaining Wall ◽  
Tensile Force ◽  
Wall Structure ◽  
Mechanically Stabilized Earth ◽  
Mechanically Stabilized Earth Walls ◽  
Mechanically Stabilized ◽  
The Stability ◽  
Earth Walls

In urban areas, the requirement for roads is always increasing. This has resulted in various problems such as limited land so that it needs to construct a proper retaining wall. The type of retaining wall that will be discussed is back-to-back mechanically stabilized earth walls. The author analyzes the minimum reinforcement length required for the stability of the retaining wall structure. The author also analyzes the use of backfill material from back-to-back mechanically stabilized earth walls. In this study, two types of backfill materials were used, sand and laterite. The author analyzes the stability of the structure using manual calculations and with software based on finite element methods with several differences in the reinforcement length of the geogrid. In manual analysis obtained the tensile force that occurs in the geogrid and the safety factor for the external stability. In the analysis using the software obtained the safety factor and deformation that occurs in the structure. The results of this study are the minimum ratio of reinforcement length to height, that is L = 0.66H for sand and L = 0.6H for laterite. The requirement of geogrid tensile capacity for laterite is smaller than for sand.Keywords: reinforcement length, mechanically stabilized earth walls, geogrid, safety factorPada daerah perkotaan, kebutuhan akan jalan selalu meningkat. Hal ini mengakibatkan berbagai masalah seperti keterbatasan lahan sehingga perlu konstruksi dinding penahan tanah yang tepat. Jenis dinding penahan tanah yang akan dibahas adalah back-to-back mechanically stabilized earth walls. Penulis menganalisis panjang penjangkaran minimum yang diperlukan untuk statbilitas struktur dinding penahan tanah. Penulis juga menganalisis penggunaan material timbunan dari back-to-back mechanically stabilized earth walls. Pada penelitian ini digunakan dua jenis material timbunan yaitu pasir dan tanah merah. Penulis menganalis kestabilan dari struktur menggunakan perhitungan manual dan dengan software berbasis metode elemen hingga dengan beberapa variasi panjang penjangkaran dari geogrid. Pada analisis manual, diperoleh gaya tarik yang terjadi pada geogrid dan faktor keamanan dari stabilitas eksternal struktur. Pada analisis menggunakan program diperoleh faktor keamanan dan deformasi yang terjadi pada struktur. Adapun hasil dari penelitian ini yaitu rasio panjang penjangkaran terhadap tinggi minimum yaitu L = 0,66H pada pasir dan L = 0,6H untuk tanah merah. Kebutuhan kapasitas tarik geogrid untuk tanah merah lebih kecil daripada pasir.Kata kunci: panjang penjangkaran, mechanically stabilized earh walls, geogrid, faktor keamanan

scholarly journals Perkuatan Lereng pada Sempadan Sungai Jl. Sultan Agung Kabupaten Jember dengan Dinding Penahan Tanah Kantilever

2021 ◽  
Vol 9 (2) ◽  
pp. 115-128
Author(s):  
Luqman Hakim ◽  
Paksitya Purnama Putra ◽  
Dwi Nurtanto
Keyword(s):  
Disaster Management ◽  
River Flow ◽  
Retaining Wall ◽  
Wall Structure ◽  
Landslide Area ◽  
Concrete Quality ◽  
Bore Pile ◽  
The Stability ◽  
Safe Condition ◽  
Reinforcement Quality

The land collapsed on Jl. Sultan Agung, Jompo, Jember Regency was reported. A team from the Regional Disaster Management Agency (BPBD) found cracks in the ground under a shop since February 2019. This incident resulted in a landslide of a road with approximately 45 meters long and 10 meters wide that it blocked the river flow, and nine shophouses, which are the assets of the Jember Regency government, collapsed as deep as approximately 4 meters. The cantilever type retaining wall is designed in the landslide area as an effort to revitalize the banks of Jompo river on Jalan Sultan Agung. Cantilever wall design stability refers to SNI 8460: 2017 and was assisted by using the GEO 5 program. The stability of cantilever walls against overturning shows a safety factor value of 3.72 that greater than 2 (safe condition), whereas the stability of cantilever walls against sliding was 1.61 that greater than 1.5 (safe condition), and the stability of the bearing capacity was 8.18 that greater than 3 (safe condition). Cantilever wall structure using concrete quality (Fc ') 40 MPa, and reinforcement quality (Fy) 420 Mpa, with a diameter and a distance of 25 mm and 125 mm respectively. Additional reinforcement was given to the Cantilever Wall, i.e. a bore-pile with a diameter of 60 cm which was fixed to a depth of 6 meters.

Dynamic Response of Reinforced Soil Retaining Wall Resting on Soft Clay

2021 ◽  
Author(s):  
Ripon Hore ◽  
Sudipta Chakraborty ◽  
Ayaz Mahmud Shuvon ◽  
Md. Fayjul Bari ◽  
Mehedi A. Ansary
Keyword(s):  
Dynamic Response ◽  
Retaining Wall ◽  
Soft Clay ◽  
Reinforced Soil

scholarly journals Structural Behavior of Prefabricated Ecological Grid Retaining Walls and Application in a Highway in China

Symmetry ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 746
Author(s):  
Xinquan Wang ◽  
Cong Zhu ◽  
Hongguo Diao ◽  
Yingjie Ning
Keyword(s):  
Retaining Wall ◽  
Contact Point ◽  
Retaining Walls ◽  
Wall Structure ◽  
Soil Arching ◽  
Finite Element Software ◽  
Study Results ◽  
Stress And Deformation ◽  
Asymmetrical Condition ◽  
Construction Efficiency

The retaining wall is a common slope protection structure. To tackle the current lack of sustainable and highly prefabricated retaining walls, an environmentally friendly prefabricated ecological grid retaining wall with high construction efficiency has been developed. Due to the asymmetrical condition of the project considered in this paper, the designed prefabricated ecological grid retaining wall was divided into the excavation section and the filling section. By utilizing the ABAQUS finite element software, the stress and deformation characteristics of the retaining wall columns, soil, anchor rods, and inclined shelves in an excavation section, and the force and deformation relationships of the columns, rivets, and inclined shelves in three working conditions in a filling section were studied. The study results imply that the anchor rods may affect the columns in the excavation section and the stress at the column back changes in an M-shape with height. Moreover, the peak appears at the contact point between the column and the anchor rod. The displacement of the column increases slowly along with the height, and the column rotates at its bottom. In the excavation section, the stress of the anchor rod undergoes a change at the junction of the structure. The inclined shelf is an open structure and is very different from the retaining plate structure of traditional pile-slab retaining walls. Its stress distribution follows a repeated U-shaped curve, which is inconsistent with the trend of the traditional soil arching effect between piles, which increases first and then decreases. For the retaining wall structure in the filling section, the numerical simulated vehicle load gives essentially consistent results with the effects of the equivalent filling on the concrete column.

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