Preprint Article Version 1 This version is not peer-reviewed

Flow-Induced Stresses and Displacements in Jointed Concrete Pipes, Installed by Pipe Jacking Method

Version 1 : Received: 15 January 2019 / Approved: 16 January 2019 / Online: 16 January 2019 (09:20:17 CET)
Version 2 : Received: 16 January 2019 / Approved: 17 January 2019 / Online: 17 January 2019 (05:02:55 CET)

A peer-reviewed article of this Preprint also exists.

Karakouzian, M.; Karami, M.; Nazari-Sharabian, M.; Ahmad, S. Flow-Induced Stresses and Displacements in Jointed Concrete Pipes Installed by Pipe Jacking Method. Fluids 2019, 4, 34. Karakouzian, M.; Karami, M.; Nazari-Sharabian, M.; Ahmad, S. Flow-Induced Stresses and Displacements in Jointed Concrete Pipes Installed by Pipe Jacking Method. Fluids 2019, 4, 34.

Journal reference: Fluids 2019, 4, 34
DOI: 10.3390/fluids4010034

Abstract

Transient flows result in unbalanced forces and high pressure in pipelines. Under these conditions, the combined effects of flow-induced forces along with sudden pipe displacements can create cracks in the pipeline, especially at the junctions. This situation consequently results in water leakage and reduced operational efficiency of the pipeline. In this study, displacements and stresses in a buried pressurized water transmission pipe installed by pipe jacking method are investigated using numerical modeling and considering interactions between fluid, pipe, and soil. The analyses were performed consecutively under no-flow, steady flow, and transient flow conditions, in order to investigate the effects of flow conditions on displacements and stresses in the system. Analyses of the results show that displacements and stresses in the jointed concrete pipes are significant under transient flow conditions. Moreover, because of pressure transient effects, maximum tensile stresses exceed the tensile strength of concrete at the junctions, leading to cracks and consequent water leakage.

Subject Areas

fluid-structure interaction; soil-structure interaction; transient flow; pipe jacking; numerical modeling; abaqus FEA

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