Effect of Bedding Compaction on the Behavior of Buried Plain Concrete Pipes

Abstract:

Plain Concrete pipes serve as effective underground infrastructure lines especially as sewer lines and culverts. The installation quality has a high effect on the performance of the buried pipe-soil system besides the pipe material strength. In this research, experimental investigation of buried plain concrete pipes installed in gravelly-sand soil and subjected to strip loading platform as surface loading to search the effect of the bedding compaction on the pipe. Granular soil bedding is a traditional material surrounding concrete pipes. An experimental testing program for two precast plain concrete pipes has 300 mm inner diameter was conducted in a laboratory soil box test facility. Loading on a pipes-soil system were applied up to collapse. Circumferential strain in pipes was measured by means of strain gauges in addition to the measurements of displacement developed in the vertical direction by means of a linear variable differential transformer (LVDT’s) and dials gauges. It is concluded that in case of loose bedding, a higher bedding factor of 1.83 is produced in comparison with dense bedding which produces a bedding factor of 1.49, thus yields that the quality of installation is improved with relatively loose bedding under the pipe.

• Periodical: Key Engineering Materials (Volume 857)
• Pages: 89-98
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.857.89
• Online since: August 2020
• Authors: Mosa J. Al-Mosawe, Abdul Muttalib I. Said, Abbas O. Dawood*
• Keywords: Bedding Factor, Buried Pipes, Compaction, Granular Bedding, Plain Concrete

References

[1] Z. Tan, Nonlinear Finite Element Study of Deteriorated Rigid Sewers Including the Influence of Erosion Voids", M.Sc thesis, Queen's University, Ontario, Canada. 3 to 1. (2007).

[2] A. Abolmaali & A. Kararam, Nonlinear Finite-Element-Based Investigation of the Effect of Bedding Thickness on Buried Concrete Pipe. Journal of Transportation Engineering, 136(9), p.793–799. (2010). https://doi.org/10.1061/(ASCE)TE.1943-5436.0000135.

DOI: 10.1061/(asce)te.1943-5436.0000135

[3] A.O. Dawood, Experimental And Numerical Analysis Of Minimum Backfill Cover Of Buried Concrete Pipes According To Local Practice Of Iraq. Proceedings of the New Developments in Structural Engineering and Construction. (2013).

DOI: 10.3850/978-981-07-5354-2_i-7-270

[4] Y. J. Hussain, Experimental And Analytical Investigation Of Minimum Backfill Cover Of GRP Pipes, M.Sc. Thesis, Baghdad University, Baghdad, Iraq. (2014).

[5] S. Alzabeebee, D.N. Chapman & A. Faramarzi, Numerical Investigation of the Bedding Factor of Concrete Pipes under Deep Soil Fill. Proceedings of the 2nd World Congress on Civil, Structural, and Environmental Engineering. (2017).

DOI: 10.11159/icgre17.119

[6] A. Kararam, Nonlinear Finite Element-Based Investigation Of The Effect Of Bedding Thickness On Underground Pipe, M.Sc. Thesis, The University Of Texas At Arlington, USA. Bed 3. (2006).

[7] P. K. Mehta and P. M. Monteiro, Concrete: Microstructure, Properties, and Materials, Third Edition, McGraw-Hill. (2006).

[8] ACI Code 318M-14, Building Code Requirements for Structural Concrete and Commentary (ACI 318M-14),, American Concrete Institute. (2015).

DOI: 10.1016/0262-5075(85)90031-4

[9] M. M. Haque, Comparison of Behavior of 1520 mm (60 in.) Concrete Pipe with SIDD Design under Deep Cover, M.Sc. Thesis, Ohio University. (1998).

[10] E.T. Selig &, D.L. Packard, Buried Concrete Pipe Trench Installation Analysis. Journal of Transportation Engineering, 113(5), p.485–501. (1987). https://doi.org/10.1061/(ASCE)0733-947X(1987)113:5(485).

DOI: 10.1061/(asce)0733-947x(1987)113:5(485)

[11] L.S., Wong, E.N. Allouche & I.D. Moore, Long-Term Monitoring and Analysis of Full Scale Concrete Pipe Test Beds. Pipelines. Available at: http://dx.doi.org/10.1061/40641(2002)76. (2002).

DOI: 10.1061/40641(2002)76

[12] U.S. Army Corps of Engineers, USACE, Settlement Analysis: Stress Distribution in Soil, EM 1110-1-1904. (1990).