Large-deformation numerical analysis of lateral pipe-soil interaction in
deep-sea pipelines

LI Chun-lei; HU Chun-hong; YU Long

doi:10.16285/j.rsm.2025.0198

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Large-deformation numerical analysis of lateral pipe-soil interaction in deep-sea pipelines

更新时间：2026-07-06

- Large-deformation numerical analysis of lateral pipe-soil interaction in deep-sea pipelines
- Vol. 47, Issue 1, Pages: 314-322(2026)
- 作者机构：
  
  1. ．大连理工大学海岸和近海工程国家重点实验室,辽宁,大连,116026
  2. ．海洋石油工程股份有限公司,天津,300450
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2025.0198
  CLC： P756.2
- Online First：08 January 2026，
  
  Published：2026
- 稿件说明：
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LI Chun-lei, HU Chun-hong, YU Long. Large-deformation numerical analysis of lateral pipe-soil interaction in deep-sea pipelines[J]. 2026, 47(1): 314-322.
DOI：

LI Chun-lei, HU Chun-hong, YU Long. Large-deformation numerical analysis of lateral pipe-soil interaction in deep-sea pipelines[J]. 2026, 47(1): 314-322. DOI： 10.16285/j.rsm.2025.0198.

摘要

深海管线通常铺设于海床表面，在自重和铺管作业的影响下会嵌入海床，其嵌入深度显著影响海床对管线的侧向土阻力。现有研究多聚焦于嵌入深度较浅情况（=0.1～0.5，为管径），而最新调查表明，部分管线嵌入深度已超过0.5。为揭示更大嵌入深度下管-土相互作用机制，采用径向基点插值法-网格重剖分和小应变插值技术（radial point interpolation method-remeshing and interpolation technique with small strain，简称RPIM-RITSS）数值方法，对嵌入深度为0.1～1.0的管线开展了管-土侧向相互作用大变形数值分析。通过与已有相关离心机试验及数值结果对比，验证了该数值方法的有效性。在此基础上，深入分析了管线嵌入深度和重量对其侧向屈曲模式和土阻力的影响，据此提出了适用于嵌入深度为0.6～1.0的残余侧向屈曲土阻力预测模型，以期为深海管线的侧向稳定性和安全评估提供参考。

Abstract

Deep-sea pipelines are typically laid on the seabed. Under the influence of their own weight and pipeline-laying operations

they become embedded into the seabed. The embedment depth wini significantly affects the lateral soil resistance exerted by the seabed on the pipeline. Existing research has primarily focused on pipelines with embedment ranging from 0.1 to 0.5 times the pipe diameter . However

recent studies show that some pipelines embed deeper than 0.5. We employed the radial point interpolation method-remeshing and interpolation technique with small strain (RPIM-RITSS) to perform large-deformation analyses of the lateral pipe-soil interaction for initial embedment from 0.1 to 1.0. The method’s effectiveness was validated by comparisons with centrifuge tests and other numerical results. Subsequent analyses examined how initial embedment and pipe weight influence the lateral-buckling mode and soil resistance. A residual-resistance model for lateral buckling

applicable to initial embedment from 0.6 to 1.0

was proposed to support the safe design of deep-sea pipelines.

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