Combined Use of Jute Geotextile-EPS Geofoam to Protect Flexible Buried Pipes: Experimental and Numerical Studies

2017 ◽  
Vol 3 (4) ◽  
Author(s):  
Y. Z. Beju ◽  
J. N. Mandal
Keyword(s):  
Buried Pipes ◽  
Eps Geofoam ◽  
Numerical Studies ◽  
Combined Use ◽  
Jute Geotextile

scholarly journals Laboratory Investigation of Buried Pipes Using Geogrid and EPS Geofoam Block

2017 ◽  
Vol 95 ◽  
pp. 022002 ◽  
Author(s):  
O. Khalaj ◽  
M. Azizian ◽  
S.N. Moghaddas Tafreshi ◽  
B. Mašek
Keyword(s):  
Laboratory Investigation ◽  
Buried Pipes ◽  
Eps Geofoam

scholarly journals Protecting buried pipelines using different shapes of geofoam blocks

2021 ◽  
Vol 15 (2) ◽  
pp. 54-62
Author(s):  
Dyaa Hassan
Keyword(s):  
Numerical Analysis ◽  
Experimental Model ◽  
Surface Displacement ◽  
Buried Pipelines ◽  
Buried Pipes ◽  
Eps Geofoam ◽  
Finite Element Software ◽  
Pipe Model ◽  
Beam System ◽  
Reducing Stress

Purpose. This research presents experimental modeling and numerical analysis on reducing stress and protecting buried pipelines using three arrangements techniques of expanded polystyrene (EPS) geofoam blocks: embankment, EPS block embracing the upper part of the pipe and EPS blocks as two posts and a beam. Methods. An experimental model consisted of steel tank with boundaries dimensions depending on the diameter of the pipe located at the center of it. The backfill on the pipe was made from sand and embedded EPS blocks with two techniques: EPS block embracing the upper part of the pipe and EPS blocks form two posts and a beam. Series of experiments were carried out using static loading on rigid steel plate to measure the pipe deformations and strains, as well as backfill surface displacement. The numerical analysis was used to simulate the experimental model using the finite element software program PLAXIS-3D. Findings. The results reveal that the most effective method which prevents stress on the buried flexible pipe was EPS post and beam system followed by EPS embracing the upper part of the pipe. The results obtained from the numerical analysis and the experiment demonstrate the same trend. The parametric study shows that EPS post and beam blocks model has higher surface displacement than embracing the upper part of the pipe model, which is more effective in case of high rigidity of the pipe. Originality. Reducing stress on buried pipes using different geofoam shapes to find which one is the optimum method. Practical implications. Two configurations of EPS geofoam blocks – EPS block embracing the upper part of the pipe and EPS blocks post and beam system - ensure successful stress reduction and protect buried pipes

Dynamic Modelling and Analysis of an Articulated Robotic Leg

2015 ◽  
Author(s):  
Mariapaola D’Imperio ◽  
Ferdinando Cannella ◽  
Luca Carbonari ◽  
Nahian Rahman ◽  
Darwin G. Caldwell
Keyword(s):  
Dynamic Modelling ◽  
Vital Role ◽  
Quadruped Robot ◽  
Robotic Systems ◽  
System Parameters ◽  
Experimental Identification ◽  
Numerical Studies ◽  
Combined Use ◽  
Robotic Leg ◽  
Numerical Approaches

In robotics, both the analytical and numerical studies play a vital role to predict the dynamic behaviours of robotic systems. Nevertheless, dynamic modelling is essential to predict the system behaiours. In this paper, both the analytical and numerical approaches are worked out for a leg of a hydraulic quadruped robot. The research aims at the identification of system parameters like inertial and geometrical magnitudes of a complex assembled leg at various cases. Due to the articulated mechanism, the model owns a significant mathematical complexity which should be possibly reduced through a combined use of analytical and multibody tools as a preliminary step to experimental identification. Both simulations and experiments results have been carried out for the goal.

Combined use of geocell reinforcement and rubber–soil mixtures to improve performance of buried pipes

2012 ◽  
Vol 34 ◽  
pp. 116-130 ◽  
Author(s):  
Gh. Tavakoli Mehrjardi ◽  
S.N. Moghaddas Tafreshi ◽  
A.R. Dawson
Keyword(s):  
Improve Performance ◽  
Buried Pipes ◽  
Combined Use ◽  
Soil Mixtures ◽  
Geocell Reinforcement

Reduction of Earth Pressure on Buried Pipes by EPS Geofoam Inclusions

2010 ◽  
Vol 33 (4) ◽  
pp. 102315 ◽  
Author(s):  
L. D. Suits ◽  
T. C. Sheahan ◽  
H. Kim ◽  
B. Choi ◽  
J. Kim
Keyword(s):  
Earth Pressure ◽  
Buried Pipes ◽  
Eps Geofoam
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