A PSO-Based Estimation of Dynamic Earth Pressure Coefficients of a Rigid Retaining Wall

2020 ◽  
pp. 169-180
Author(s):  
Swarnima Subhadarsini ◽  
Sushree Paritwesha Pradhan ◽  
Jayanti Munda ◽  
Pradip Kumar Pradhan
Keyword(s):  
Retaining Wall ◽  
Earth Pressure ◽  
Pressure Coefficients ◽  
Dynamic Earth Pressure

Determination of passive earth pressure coefficients using limit equilibrium approach coupled with the Kötter equation

2015 ◽  
Vol 52 (9) ◽  
pp. 1241-1254 ◽  
Author(s):  
Mrunal A. Patki ◽  
J.N. Mandal ◽  
D.M. Dewaikar
Keyword(s):  
Limit Equilibrium ◽  
Retaining Wall ◽  
Earth Pressure ◽  
Failure Surface ◽  
Passive Earth Pressure ◽  
Pressure Coefficients ◽  
Composite Failure ◽  
Equilibrium Approach ◽  
The Moment

A numerical method is developed to evaluate the passive earth pressure coefficients for an inclined rigid retaining wall resting against a horizontal cohesionless backfill. A composite failure surface comprises a log spiral, and its tangent is assumed in the present study. The unique failure surface is identified based on the limit equilibrium approach coupled with the Kötter equation (published in 1903). Force equilibrium conditions are used to evaluate the magnitude of the passive thrust, whereas the moment equilibrium condition is employed to determine the location of the passive thrust. The distinctive feature of the present study is that no assumption is required to be made regarding the point of application of the passive thrust, which would otherwise be an essential criterion with respect to the several limit equilibrium based investigations available in the literature. The passive earth pressure coefficients, Kpγ, are evaluated for various values of soil frictional angle [Formula: see text], wall frictional angle δ, and wall inclination angle λ, and compared with the existing results.

Numerical simulation of an instrumented cantilever retaining wall

2011 ◽  
Vol 48 (9) ◽  
pp. 1303-1313 ◽  
Author(s):  
Ashok K. Chugh ◽  
Joseph F. Labuz
Keyword(s):  
Numerical Simulation ◽  
Field Data ◽  
Retaining Wall ◽  
Earth Pressure ◽  
Satisfactory Explanation ◽  
Foundation Soil ◽  
Pressure Coefficients ◽  
Working Hypothesis ◽  
Earth Pressures ◽  
Practical Implications

The field data of an instrumented cantilever retaining wall are reexamined to develop a working hypothesis for the mechanism that explains the observed response. The field data are in terms of earth pressures and wall movements (deflection, translation, and rotation) from the start to completion of backfilling. The observed response demonstrates strong interaction between the retaining wall and foundation soil. Traditional calculations based on earth pressure coefficients had not provided a satisfactory explanation for the measured responses during placement of backfill. In this paper, the working hypothesis, and results from its implementation in a continuum-mechanics-based computer program are presented. The numerical model results, displacements and earth pressures, are in general agreement with the field data for all stages of backfill placement and provide a clear exposition to the observed response. Practical implications of the work are included.

Force Polygon and Seismic Active Earth Pressure on the Back of a Retaining Wall Supporting c-F Backfill

2011 ◽  
Vol 2 (1) ◽  
pp. 20-28
Author(s):  
Sima Ghosh ◽  
Richi Prasad Sharma
Keyword(s):  
Retaining Wall ◽  
Earth Pressure ◽  
Active Earth Pressure ◽  
Tension Crack ◽  
Pressure Coefficients ◽  
Seismic Active Earth Pressure ◽  
Surcharge Load ◽  
Seismic Forces ◽  
Over The Top ◽  
Inertia Forces

The study presents a rational graphical approach to discover the dynamic active earth pressure on the back of a battered face retaining wall having inclined c-F backfill with surcharge load over the top of backfill. Considering the seismic forces as time independent inertia forces acting at the c.g. of the wedge soil, the law of force polygon is applied in the evaluation of seismic active earth pressure. A depth of tension crack in case of c-F backfill is also considered. A detailed parametric study has been made for the variation of seismic active earth pressure coefficients with respect to c, ca, F, d, kh, kv.

Static and Dynamic Earth Pressure Behind Retaining Wall

2009 ◽  
Author(s):  
V.K. Puri ◽  
B.M. Das ◽  
S.C. Yen ◽  
M.A. Wright ◽  
J.R. Marcano
Keyword(s):  
Retaining Wall ◽  
Earth Pressure ◽  
Dynamic Earth Pressure

scholarly journals Dual Row Retaining Walls in Dry Sand: The Influence of Wall Stiffness on the Seismic Response

2020 ◽  
Author(s):  
Srikanth S. C. Madabhushi ◽  
Stuart K Haigh
Keyword(s):  
Earth Pressure ◽  
Retaining Walls ◽  
Environmental Benefits ◽  
Limit States ◽  
Moment Capacity ◽  
Pressure Coefficients ◽  
Lateral Capacity ◽  
Wall Stiffness ◽  
Strength And Stiffness ◽  
Dynamic Earth Pressure

Dual row retaining walls can form efficient port and embankment structures, or even be used as coastal defence against Tsunamis. The system of parallel sheet pile walls can have a large lateral capacity within serviceability limit states due to the combined strength and stiffness of the walls and confined soil. Optimising the design by reducing the wall section and ensuring greater utilisation of the soil capacity has economic and environmental benefits but requires a deeper understanding of the dynamic soil-structure interaction. Centrifuge and numerical modelling is used to elucidate the mechanics of two systems with relatively flexible and stiff walls. Considering the fraction of the walls plastic moment capacity mobilised alongside the peak deflections illustrates the advantages of using relatively flexible retaining walls in these systems. More fundamentally, the importance of vertical variations of both the stress and strain during the horizontal dynamic loading is shown. The limiting horizontal stresses and phasing of the stress components around the walls are better understood by considering the mobilisation of earth pressure coefficients, reinforcing previous work which recommends a move away from conventionally defined limiting dynamic earth pressure coefficients.

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