软黏土海床条件下的管道侧向失稳预测模型

发布时间：2018-06-09 21:29

  本文选题：软黏土 + 海底管道　； 参考：《中国海洋大学学报(自然科学版)》2017年10期

【摘要】：针对软黏土海床条件,基于被动土压力理论建立了海底管道侧向失稳预测模型。利用准静态平衡分析,该模型将极限侧向土阻力分解为被动土压力和滑动土阻力两个分量。验证分析表明,模型预测结果与文献[3]实验结果吻合较好。参量研究发现,在稳态海流作用下,随着软黏土不排水抗剪强度增大,维持管道在位稳定所需的最小埋深呈幂指数减小趋势;同时,极限侧向土阻力中的滑动土阻力分量呈非线性增大,相应的被动土压力分量则逐渐降低。
[Abstract]:Based on the passive earth pressure theory, the lateral instability prediction model of submarine pipeline is established for the soft clay seabed condition. By using quasi-static equilibrium analysis, the ultimate lateral soil resistance is decomposed into two components: passive soil pressure and sliding soil resistance. Verification and analysis show that the model prediction results are in good agreement with the experimental results in literature [3]. It is found that the minimum buried depth required to maintain the in-situ stability of the pipeline decreases exponentially with the increase of the undrained shear strength of the soft clay under the action of steady current, and at the same time, In the ultimate lateral soil resistance, the sliding soil resistance component increases nonlinear, and the corresponding passive soil pressure component decreases gradually.
【作者单位】： 中国科学院力学研究所流固耦合系统力学重点实验室;中国科学院大学工程科学学院;
【基金】：国家自然科学基金项目(11372319;11232012) 中国科学院战略性先导科技专项(B类)项目(XDB22030000)资助~~
【分类号】：P756.2
，

本文编号：2000894