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.

Three-dimensional stability analysis for slurry-filled trench wall in cohesionless soil

1996 ◽  
Vol 33 (5) ◽  
pp. 798-808 ◽  
Author(s):  
Jiin-Song Tsai ◽  
Jia-Chyi Chang
Keyword(s):  
Stability Analysis ◽  
Stability Problem ◽  
Slip Surface ◽  
Three Dimensional ◽  
Vertical Direction ◽  
Soil Mass ◽  
Cohesionless Soil ◽  
Cohesionless Soils ◽  
Slurry Trench ◽  
The Stability

On the basis of the limiting equilibrium and arching theory, a three-dimensional analysis is proposed for slurry-supported trenches in cohesionless soils. This analytical approach is developed by considering the trench stability problem as a vertical soil cut within a fictitious half-silo with a rough wall surronding. Arching effects are considered not only in the vertical direction but also in the horizontal direction. A shell-shaped slip surface of the sliding soil mass is defined by Mohr-Coulomb criterion. The factor of safety is defines as the ratio of the resisting force induced by slurry pressure to the horizontal force required to maintain the stability of the trench wall. Results of the proposed method have been compared with those of two existing analytical methods for a typical trench stability problem. Key words: stability analysis, slurry trench wall, cohesionless soil.

scholarly journals Sliding failure analysis of a gabion retaining wall at km 31+800 of Lubuk Selasih – Padang city border highway, Indonesia

2020 ◽  
Vol 156 ◽  
pp. 02005
Author(s):  
Hanafi ◽  
Hendri Gusti Putra ◽  
Andriani
Keyword(s):  
Stability Analysis ◽  
Contact Area ◽  
Retaining Wall ◽  
Field Investigation ◽  
Wire Mesh ◽  
Soil Parameters ◽  
Road Section ◽  
Sliding Stability ◽  
The Stability ◽  
National Road

In August 2010, there was a landslide on the down-slope of national road section at Km 31+800 Lubuk Selasih – Padang City Border. In order to prevent further damage, it was necessary to make an immediate repair by constructing a gabion retaining wall. Since this repair was so urgent, physical and mechanical soil parameters for the stability analysis were determined from literature data. The stability analysis considered dangers of overturning, sliding, and soil bearing capacity. For the sliding stability analysis, the value for friction considered only the interaction between the soil and the base of the retaining wall, with the assumption that the contact area was equal to the total area of the entire base of the retaining wall. After the construction was completed, sliding failure occured due to pressure from the backfill embankment. This research performs a reanalysis of the retaining wall stability using soil and gabion parameters determined from field investigation and laboratory testing. In this reanalysis the friction contact area was assumed to be between the soil and the wire mesh of retaining wall. With these parameters and assumption, the main cause of sliding failure became clear, indicating that this approach increased the accuracy of stability analysis for gabion retaining walls.

scholarly journals DESIGN OF RETAINING WALL USING ALTERNATIVE GABION AND RETAINING WALLS OF CANTILEVER TYPE ON SLOPE OPEN SPACE GREEN JL. KINIBALU BANJARBARU

CERUCUK ◽  
2021 ◽  
Vol 5 (1) ◽  
pp. 69
Author(s):  
Adelina Melati Sukma
Keyword(s):  
Stability Analysis ◽  
Safety Factor ◽  
Carrying Capacity ◽  
Rainy Season ◽  
Open Space ◽  
Retaining Wall ◽  
Retaining Walls ◽  
Stability Calculation ◽  
Overall Stability ◽  
The Stability

On the construction of green open space Jl. Kinibalu Banjarbaru There is a 6 meters tall slope beneath which the river is lined up during the rainy season and makes the slope exposed by water plus the absence of load or traffic on it make the pore figures on the land is large. Therefore, for protection reason, there is a soil alignment in the construction of soil retaining walls. The planned ground retaining wall type is cantilever and gabion. The stability analysis of the ground retaining walls is done manually and with the help of the Geoslope/W 2018 software. The value of the stability of the style against the bolsters, sliding, and carrying capacity of the soil using manual calculations for cantilever type and Netlon qualifies SNI 8460:2017. And for the overall stability calculation using Geoslope/W 2018 software obtained safety factor (SF) > 1.5. From the analysis, the design of planning can be used because it is safe against the dangers of avalanche.

scholarly journals PEMANFAATAN SILINDER LIMBAH TES BETON SEBAGAI DINDING PENAHAN TANAH TIPE GRAVITASI

2015 ◽  
Vol 9 (1) ◽  
pp. 1
Author(s):  
Dimas Prasetyo Muhammad, Gerard Aponno, Suselo Utoyo
Keyword(s):  
Stability Analysis ◽  
Safety Factor ◽  
Retaining Wall ◽  
Cost Estimate ◽  
Trial And Error ◽  
Foundation Soil ◽  
Trial And Error Method ◽  
The Stability ◽  
Error Method ◽  
Horizontal Arrangement

The utilization of concrete-test-cylindrical waste was few due to it’s tendency to roll over when being stacked and the stacked form was not uniform like cubed waste. That is why the writer wants to use the cylindrical waste as a material of gravity-typed retaining wall.The purpose of this study is to find out the stability, cost, and implemention method of cylindrical waste as a material such retaining wall.The stability analysis of retaining wall made from cylindrical concrete was compared to commonly stoned retaining wall through trial and error method. The next step was to make the construction of retaining wall made from cylindrical concrete and stone to see the implemetion method and cost needed per m3.       Stability analysis results in cylindrical concrete retaining wall safe from rolling, sliding, and reaction of foundation soil. Compared to stoned retaining wall of 3,00 m tall and 1,70 m long, it has safety factor (SF) Fgl = 2.13, Fgs = 2,37, and qumax = 4,07 ton/m2  which means it is close to the FS of stoned retaining wall Fgl = 2.18, Fgs = 2,39, and qumax = 9,89 ton/m2 ; at IDR 1.012.093,74 per m3 which means it is IDR 389.553 more expensive  ; and it is of horizontal arragement.Keywords: retaining wall, concrete-test cylinder, stability, cost estimate, horizontal arrangement.

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 Stability Analysis of a High Stone Retaining Wall: A Case of Eskipazar/Turkey

2017 ◽  
Vol 3 (2) ◽  
pp. 26
Author(s):  
İnan Keskin
Keyword(s):  
Stability Analysis ◽  
Slope Stability ◽  
Retaining Wall ◽  
Retaining Walls ◽  
Stone Masonry ◽  
The North ◽  
Index Terms ◽  
Natural Stones ◽  
The Stability ◽  
Very High

Abstract— The use of natural stones in retaining wall has been a tradition and common practice throughout human history. Stone retaining walls are load bearing retaining walls, which have long been analyzed by considering the equilibrium of forces and moments applied to the wall treated as a rigid solid. Stone retaining walls can be designed for the provision of some slope stability. This paper provides a review of stability analysis of high stone retaining walls. This paper provides a review of stability analysis of high stone retaining walls using Geo5 software. The stone retaining wall examined in this study is located in Karabük (Turkey). The study area was located near of the North Anatolian Fault Line (NAF) which are the most important fault lines in Turkey. For that reason, the stability analyzes were carried out considering the earthquake situation. The stone retaining wall is made of traverten type rock. This rock is a commonly observed rock type. The height of the analyzed wall is 10 m. A 5 kPa uniformly distributed load was adopted in the stability analysis to accommodate for the heaviest loading condition during construction. The analysis with Geo5 found a wall factor of safety 1.78. At this value, it shows that the wall will stable although it is very high.   Index Terms— Stone masonry walls, slope stability, Geo5, Turkey

scholarly journals Experimental Study on Mechanical Properties of Reinforced Soil Interface under Dry-Wet Cycle

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Liang Huang ◽  
Wenbo Ma ◽  
Yujie Hou ◽  
Bo Wang ◽  
Jiahua Zhu
Keyword(s):  
Mechanical Properties ◽  
Water Content ◽  
Working Conditions ◽  
Retaining Wall ◽  
Reinforced Soil ◽  
Soil Reinforcement ◽  
Overburden Pressure ◽  
Pull Out ◽  
Apparent Cohesion ◽  
Soil Interface

The reinforced soil-retaining wall has been widely used in coastal projects, and the dry-wet cycles influence the mechanical properties of the reinforced soil interface. This study conducts macro-micro tests and selects four different water content samples of reinforced soil with five types of overburden pressure conditions and three sets of dry-wet cycles, with a total of 60 working conditions. The pull-out test was used to study the mechanical properties of the reinforced soil interface. The scanning electron microscope was used to observe the microscopic characterization of the particles under different working conditions. Through the analysis of the experimental results, we can draw the conclusion as follows. (1) The friction coefficient of the reinforced soil interface decreases with the increase of the number of dry and wet cycles. (2) The apparent cohesion of soil-reinforcement interface decreases with the increase of the number of dry-wet cycles. After 30 dry-wet cycles, the apparent cohesion of the soil-reinforcement interface with water content of 14% is the maximum 5.91 kPa. The variation law of cohesion derived from microstructure analysis conforms to the laws and conclusions obtained by the experiment. (3) The shear stress of the reinforced soil is linearly related to the normal stress, which is in accordance with Coulomb’s law.

Numerical studies for the variable-order nonlinear fractional wave equation

2012 ◽  
Vol 15 (4) ◽  
Author(s):  
N. Sweilam ◽  
M. Khader ◽  
H. Almarwm
Keyword(s):  
Wave Equation ◽  
Stability Analysis ◽  
Numerical Scheme ◽  
Numerical Test ◽  
Variable Order ◽  
Fractional Wave Equation ◽  
Numerical Studies ◽  
Explicit Finite Difference ◽  
The Stability ◽  
Explicit Finite Difference Method

AbstractIn this paper, the explicit finite difference method (FDM) is used to study the variable order nonlinear fractional wave equation. The fractional derivative is described in the Riesz sense. Special attention is given to study the stability analysis and the convergence of the proposed method. Numerical test examples are presented to show the efficiency of the proposed numerical scheme.

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