Investigating pipeline–soil interaction under axial–lateral relative movements in sand

Abstract

This paper presents results from an experimental and numerical study on the axial–lateral interaction of pipes with dense sand. A series of centrifuge tests were conducted, with a rigid pipeline displaced in the horizontal plane in a cohesionless test bed. The relative pipe–soil interaction included axial, lateral, and oblique loading events. A three-dimensional continuum finite element model was developed using ABAQUS/Standard ( Hibbitt et al. 2005 ) software. The numerical model was calibrated against experimental results. A parametric study was conducted, using the calibrated finite element model to extend the investigations. The ultimate axial and lateral soil loading was found to be dependent on the angle of attack for relative movement between the pipe and soil. Two different failure mechanisms were observed for axial–lateral pipeline–soil interaction. This study confirms and improves on a two-part failure criterion that accounts for axial–lateral coupling during oblique soil loading events on buried pipelines.

Lateral resistance of pipes and strip anchors buried in dense sand

“…Reanalyzing 61 55 tests on model pipes and 54 on anchors, White et al (2008) showed that the same limit equilibrium provide deformation of the soil particles and location of the shear bands, tests on a wide range of 80 burial depths could not be conducted. In addition, a number of centrifuge tests were also conducted 81 using the geotechnical centrifuge at C-CORE (Daiyan et al 2011;Debnath 2016). 82…”

“…The burial depth is also expressed in normalized form using the "embedment ratio, ̃ = H/D." 87 A considerable number of physical experiments were conducted on lateral pipe-soil interaction 88 (Trautmann 1983;Hsu 1993; Daiyan et al 2011;Burnett 2015; Monroy et al 2015). Guo and 89 Stolle (2005) compiled data from 11 experimental tests on dense sand and showed that the 90 maximum dimensionless force (Nhp) increases with ̃ and decreases with an increase in pipe 91 diameter.…”

Estimating earth loads on buried pipes under axial loading condition: insights from 3D discrete element analysis

“…A case study [10] that involves centrifuge tests and numerical analysis performed on a rigid pipe buried in dense sand and subjected to relative axial movement is used to further validate the proposed expression. The geometry and soil properties used in the experiments are provided in Fig.…”

“…[2,7,10,18,21,25,26,[37][38][39]. Roy et al [33] used finite element (FE) analysis to model soil-pipe interaction in dense sand subjected to lateral ground displacements.…”

Axial friction response of full-scale pipes in soft clays

“…In attempting to obtain the friction coefficient of pipelines, theoretical and experimental researches are available. Many researches focused on the interaction of pipe with cohesionless soil over the past several decades [2,[10][11][12][13][14][15]. Only a minority of scholars studied the pipe-clay interaction using model tests.…”