Experimental study of the performance of plastic pipes buried in dune sand

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5 Citations (Scopus)

Abstract

This paper presents a laboratory model to study the performance of plastic pipes installed in dune sand. Model PVC pipes were installed in a rigid steel tank and tested. The model simulated trench construction with the pipe placed in the middle of the tank and dune sand along the boundaries and on the bottom of the tank to simulate the native soil. The bedding underneath the pipe and the backfill around the pipe were constructed using carefully placed and compacted dune sand. For comparison purposes, a well-selected coarse sand was also used as a bedding material. Different factors were considered such as type of bedding, degree of compaction of bedding, soil cover depth, magnitude of applied surface pressure, and load repetition. The experimental results showed that plastic pipes can be installed in well-placed and compacted dune sand bedding and backfill. A minimum soil cover of 2d is required to guard against adverse effects of surface loading on the pipe. The pipe behaved in elastic range during all stages of loading with small amount of unrecoverable deformations upon the removal of all loads. However, significant recovery (or rebound) occurred only after the removal of all applied surface pressure and portion of the soil cover soil up to 1d above the crown.

Original languageEnglish
Pages (from-to)236-245
Number of pages10
JournalInternational Journal of Geotechnical Engineering
Volume10
Issue number3
DOIs
Publication statusPublished - May 26 2016

Fingerprint

plastic pipes
dune sand
Plastic pipe
pipes
dune
Sand
experimental study
pipe
plastic
Pipe
Soils
soil cover
soil
backfill
surface pressure
Steel tanks
steel
Polyvinyl chlorides
Compaction
adverse effects

Keywords

  • Backfill
  • Bedding
  • Bending moment
  • Deflection
  • Dune sand
  • Hoop strains
  • Plastic pipes
  • Thrust

ASJC Scopus subject areas

  • Environmental Engineering
  • Geotechnical Engineering and Engineering Geology
  • Soil Science

Cite this

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title = "Experimental study of the performance of plastic pipes buried in dune sand",
abstract = "This paper presents a laboratory model to study the performance of plastic pipes installed in dune sand. Model PVC pipes were installed in a rigid steel tank and tested. The model simulated trench construction with the pipe placed in the middle of the tank and dune sand along the boundaries and on the bottom of the tank to simulate the native soil. The bedding underneath the pipe and the backfill around the pipe were constructed using carefully placed and compacted dune sand. For comparison purposes, a well-selected coarse sand was also used as a bedding material. Different factors were considered such as type of bedding, degree of compaction of bedding, soil cover depth, magnitude of applied surface pressure, and load repetition. The experimental results showed that plastic pipes can be installed in well-placed and compacted dune sand bedding and backfill. A minimum soil cover of 2d is required to guard against adverse effects of surface loading on the pipe. The pipe behaved in elastic range during all stages of loading with small amount of unrecoverable deformations upon the removal of all loads. However, significant recovery (or rebound) occurred only after the removal of all applied surface pressure and portion of the soil cover soil up to 1d above the crown.",
keywords = "Backfill, Bedding, Bending moment, Deflection, Dune sand, Hoop strains, Plastic pipes, Thrust",
author = "Mohamedzein, {Yahia E.A.} and Al-Aghbari, {Mohammed Y.}",
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AB - This paper presents a laboratory model to study the performance of plastic pipes installed in dune sand. Model PVC pipes were installed in a rigid steel tank and tested. The model simulated trench construction with the pipe placed in the middle of the tank and dune sand along the boundaries and on the bottom of the tank to simulate the native soil. The bedding underneath the pipe and the backfill around the pipe were constructed using carefully placed and compacted dune sand. For comparison purposes, a well-selected coarse sand was also used as a bedding material. Different factors were considered such as type of bedding, degree of compaction of bedding, soil cover depth, magnitude of applied surface pressure, and load repetition. The experimental results showed that plastic pipes can be installed in well-placed and compacted dune sand bedding and backfill. A minimum soil cover of 2d is required to guard against adverse effects of surface loading on the pipe. The pipe behaved in elastic range during all stages of loading with small amount of unrecoverable deformations upon the removal of all loads. However, significant recovery (or rebound) occurred only after the removal of all applied surface pressure and portion of the soil cover soil up to 1d above the crown.

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