Experimental Simulation for Load Reduction Techniques on Underground Utilities using Geofoam

Bahr M. A., Tarek M. F., Hassan A, A., Hassaan D. M.
This paper investigates an experimental study on reducing stress acting on buried flexible pipes by using expanded polystyrene (EPS) geofoam techniques. An experimental model was carried out with dimensions depending on pipe diameter (D) and location, the used fill cover material was from sand and EPS blocks either embankment form, or within sand backfill as embedded layer. The pipe flexible is un-plasticized polyvinyl chloride (UPVC). A series of experiments have been carried out by using static surface loading on rectangular steel plate,where the load is distributed over the backfill. The behavior of sand backfill around the pipe was observed, and the displacement and strains of the pipe were measured. The experimental results showed that the embedded layer of EPS geofoam block embedded in sand for different techniques reduced the deformation of flexible buried pipe, with high efficiency and low coast compared with EPS geofoam only. The results reveal that, the most effective methods thatcanreduce the stress on buried flexible pipe with low cost were EPS encasement block with head void method, and EPS block embraces the upper part of pipe method.

Keywords

buried flexible pipes; geofoam; a laboratory setup

References

Ahmed MR, Meguid MA, Whalen J. Laboratory Measurement of the Load Reduction on Buried Structures Overlain by EPS Geofoam. GeoMontreal Conference, Montreal, Quebec, 2013.p.1-10.

American Lifelines Alliance. Gideline for the Designe Buried Steel Pipe. American Sociaty of Civil Engineering ASCE, July 2001.

Bartlett S F, Lingwall B N, Vaslestad J. Methods of protecting buried pipelines and culverts in transportation infrastructure using EPS geofoam. Geotextiles and Geomembranes. June - 2015, pp1-12.

Ilamparuthi K, Rajkumar R. Experimental Study on the Behaviour of Buried Flexible Plastic Pipe. EJGE

Journal, Vol. 13, Bund C. 2008, p.1- 10.

Kamel S, Meguid MA. Investigating The Effects of Local Contact Loss on the Earth Pressure Distribution

on Rigid Pipes. Geotechnical and Geological Engineering 31(1), 2013. P.199–212.

National Cooperative Highway Research Program NCHRP. Geofoam Applications in the Design and Construction of Highway Embankments. Web Document 65 (Project 24-11) Stark, T. D., Arellano, D., Horvath, J. S. and Leshchinsky, D., Scarsdale, New York, 2004.

Ng P C F. Behaviour of Buried Pipelines Subjected to External Loading. Thesis submitted to the University of Sheffield for the Degree of Doctor of Philosophy, 1994.

Yoshizaka K, and Sakanoue T. Experimental study on soil-pipeline interaction using EPS backfill. Pipelines 2003.Copyright ASCE 2004.P. 1126-1134.

Stark TD, Bartlett SF, Arellano D. Expanded Polystyrene (EPS) Geofoam Applications and Technical Data. The EPS Industry Alliance, 1298 Cronson Blvd ., Suite 201, Crofton, MD 21114, 2012, p.1-36.

Vaslestad J, Johansen T H, Holm W. Load reduction on rigid culverts beneath high fills: Longterm behaviour. Transportation Research Record 1415, Norwegian Road Research Laboratory, Public Road Research Administration, 1993. P.58-68.

Copyright (c) 2018 Bahr M. A. Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.