The Role of Expanded Polystyrene and Geocell in Enhancing the Behavior of Buried HDPE Pipes under Trench Loading Using Numerical Analyses

The Role of Expanded Polystyrene and Geocell in Enhancing the Behavior of Buried HDPE Pipes under Trench Loading Using Numerical Analyses

In recent years, much research has focused on the use of various materials for relieving and strengthening soil, e.g., steel reinforcing ribs, geosynthetics, geocell, waste tires, and expanded polystyrene (EPS). EPS is being used increasingly in geo-infrastructure, being a super-light material, to r...

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Main Authors: Omid Khalaj, Mehran Azizian, Naser Joz Darabi, Seyed Naser Moghaddas Tafreshi, Hana Jirková
Format: Article
Language:English
Published: MDPI AG 2020-06-01
Series:Geosciences
Subjects:
EPS Geofoam
Buried Pipe
Geocell
Reinforcement
Numerical analysis
Online Access:https://www.mdpi.com/2076-3263/10/7/251
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spelling doaj-f73ae46ae3d249309ffae041f9b022582020-11-25T03:11:14ZengMDPI AGGeosciences2076-32632020-06-011025125110.3390/geosciences10070251The Role of Expanded Polystyrene and Geocell in Enhancing the Behavior of Buried HDPE Pipes under Trench Loading Using Numerical AnalysesOmid Khalaj0Mehran Azizian1Naser Joz Darabi2Seyed Naser Moghaddas Tafreshi3Hana Jirková4Regional Technological Institute, University of West Bohemia, Univerzitní 8, 301 00 Pilsen, Czech RepublicFaculty of Civil Engineering, K.N.Toosi University of Technology, No. 1346, Valiasr Street, Mirdamad Intersection, Tehran 1996715433, IranFaculty of Civil Engineering, K.N.Toosi University of Technology, No. 1346, Valiasr Street, Mirdamad Intersection, Tehran 1996715433, IranFaculty of Civil Engineering, K.N.Toosi University of Technology, No. 1346, Valiasr Street, Mirdamad Intersection, Tehran 1996715433, IranRegional Technological Institute, University of West Bohemia, Univerzitní 8, 301 00 Pilsen, Czech RepublicIn recent years, much research has focused on the use of various materials for relieving and strengthening soil, e.g., steel reinforcing ribs, geosynthetics, geocell, waste tires, and expanded polystyrene (EPS). EPS is being used increasingly in geo-infrastructure, being a super-light material, to replace part of the soil and decrease the ground pressure on buried structures. This paper presents experimental and numerical analyses of the effectiveness of expanded polystyrene and geocell reinforcement for ameliorating the behavior of unpressurized buried pipes exposed to surface loading. A 3-D finite element method (FEM) model of soil, geofoam, geocell, and piping was generated in ABAQUS, and the model was verified by experimental analyses conducted at a laboratory. The results show that reinforcing the soil cover with geocell and geofoam has a substantial impact, decreasing the maximum surface settlement by around 29% and maximum pipe crown displacement by up to 39.5%. In addition, the EPS block density can reduce the maximum pipe crown displacement substantially.https://www.mdpi.com/2076-3263/10/7/251EPS GeofoamBuried PipeGeocellReinforcementNumerical analysis
collection DOAJ
language English
format Article
sources DOAJ
author Omid Khalaj
Mehran Azizian
Naser Joz Darabi
Seyed Naser Moghaddas Tafreshi
Hana Jirková
spellingShingle Omid Khalaj
Mehran Azizian
Naser Joz Darabi
Seyed Naser Moghaddas Tafreshi
Hana Jirková
The Role of Expanded Polystyrene and Geocell in Enhancing the Behavior of Buried HDPE Pipes under Trench Loading Using Numerical Analyses
Geosciences
EPS Geofoam
Buried Pipe
Geocell
Reinforcement
Numerical analysis
author_facet Omid Khalaj
Mehran Azizian
Naser Joz Darabi
Seyed Naser Moghaddas Tafreshi
Hana Jirková
author_sort Omid Khalaj
title The Role of Expanded Polystyrene and Geocell in Enhancing the Behavior of Buried HDPE Pipes under Trench Loading Using Numerical Analyses
title_short The Role of Expanded Polystyrene and Geocell in Enhancing the Behavior of Buried HDPE Pipes under Trench Loading Using Numerical Analyses
title_full The Role of Expanded Polystyrene and Geocell in Enhancing the Behavior of Buried HDPE Pipes under Trench Loading Using Numerical Analyses
title_fullStr The Role of Expanded Polystyrene and Geocell in Enhancing the Behavior of Buried HDPE Pipes under Trench Loading Using Numerical Analyses
title_full_unstemmed The Role of Expanded Polystyrene and Geocell in Enhancing the Behavior of Buried HDPE Pipes under Trench Loading Using Numerical Analyses
title_sort role of expanded polystyrene and geocell in enhancing the behavior of buried hdpe pipes under trench loading using numerical analyses
publisher MDPI AG
series Geosciences
issn 2076-3263
publishDate 2020-06-01
description In recent years, much research has focused on the use of various materials for relieving and strengthening soil, e.g., steel reinforcing ribs, geosynthetics, geocell, waste tires, and expanded polystyrene (EPS). EPS is being used increasingly in geo-infrastructure, being a super-light material, to replace part of the soil and decrease the ground pressure on buried structures. This paper presents experimental and numerical analyses of the effectiveness of expanded polystyrene and geocell reinforcement for ameliorating the behavior of unpressurized buried pipes exposed to surface loading. A 3-D finite element method (FEM) model of soil, geofoam, geocell, and piping was generated in ABAQUS, and the model was verified by experimental analyses conducted at a laboratory. The results show that reinforcing the soil cover with geocell and geofoam has a substantial impact, decreasing the maximum surface settlement by around 29% and maximum pipe crown displacement by up to 39.5%. In addition, the EPS block density can reduce the maximum pipe crown displacement substantially.
topic EPS Geofoam
Buried Pipe
Geocell
Reinforcement
Numerical analysis
url https://www.mdpi.com/2076-3263/10/7/251
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