Original scientific paper
https://doi.org/10.30765/er.40.1.04
Effects Of Backfill Soil On Pipeline’s Mechanical Response Subjected To Perilous Rock Impact
Jie Zhang
orcid.org/0000-0002-0437-9834
; Key Laboratory of Safe and Effective Coal Mining (Anhui University of Science and Technology), Ministry of Education, Huainan, ChinaSchool of Mechatronic Engineering, Southwest Petroleum University, Chengdu, China
Wei Guo
; School of Mechatronic Engineering, Southwest Petroleum University, Chengdu, China
Haiyang Li
; Key Laboratory of Safe and Effective Coal Mining (Anhui University of Science and Technology), Ministry of Education, Huainan, China
Abstract
Perilous rock impact is one of the most serious geological disasters that threats to buried pipeline security. Mechanical behavior of buried pipeline in rock stratum impacted by perilous rock was simulated in this paper. And effects of impact velocity and backfill soil parameters on stress and strain of pipeline were discussed. The resluts show that cross section shape of pipeline is oval when impact velocity is small. Impact dent appears on pipeline with the increasing of impact velocity, buckling is more serious and plastic stain increases. Under low velocity impact, stress and plastic strain decrease with the increasing of soil's elastic modulus. Plastic strain increases first and then decreases with the increasing of soil's Poisson's ratio. With the increasing of soil's cohesion, plastic strain increases, but stress first increases and then decreases. Under high velocity impact, deformation and plastic strain increase with the decreasing of elastic modulus and Poisson's ratio. But cohesion has a small effect on buckling behavior of pipeline.
Keywords
buried pipeline; backfill soil; perilous rock; mechanical property; plastic strain; impact dent
Hrčak ID:
232823
URI
Publication date:
27.1.2020.
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