A refined analytical model for landslide or debris flow impact on pipelines - Part II: Embedded pipelines
A refined analytical model for landslide or debris flow impact on pipelines - Part II: Embedded pipelines
复制标题
滑坡或泥石流对管道影响的精细分析模型 - 第二部分：嵌入式管道
DOI：
10.1016/j.apor.2011.12.002
复制
发表时间：
2012-03-01
影响因子：
4.3
通讯作者：
Xie, Yonggui
中科院分区：
文献类型：
--
作者：
Yuan, Feng;Wang, Lizhong;Xie, Yonggui
在深水中，管道直接铺设在海床上，没有任何保护，但重型管道在安装过程中会嵌入海床。重型管道在滑坡影响下的行为与轻型管道不同，因为重型管道在滑坡影响下横向移动时会向下移动。本工作将管道分为四段：第一段位于滑坡区，受滑坡阻力和非线性侧向土阻力共同作用;第二段靠近滑坡区，仅受侧向土阻力的外荷载作用;第三段远离滑坡区，受线性增加的侧向土阻力的外荷载作用;最后一段由轴向阻力唯一地加载。根据不同的受力条件，分别建立了四段的控制方程，并根据边界条件和连续性条件建立了相应的方程组。通过数值方法得到了最终的解。该模型简单可靠。参数研究表明，重型管道的行为是不同于那些表面轻的。(C)2011爱思唯尔有限公司保留所有权利。
In deepwater, the pipeline is directly laid on the seabed without any protection, but the heavy pipelines will embed into the seabed during installation. The behavior of heavy pipeline under the impact of landslide is different from that of light pipeline because the heavy pipeline will move downwards when moving laterally under the impact of landslide. This work divides the pipeline into four segments: the first segment in the landslide zone, which is exposed to landslide drag force and nonlinear lateral soil resistance; the second one adjacent to the landslide zone, which is only externally loaded by lateral soil resistance; the third one is further away from the landslide, which is loaded by linearly increasing lateral soil resistance; the last segment is uniquely loaded by axial resistance. The governing equations of the four segments are expressed according to their different loading conditions, and an equation system is established on the basis of boundary conditions and continuity conditions. The final solution is obtained through a numerical method. The model proves to be simple and reliable. The parametric study reveals that the behaviors of heavy pipelines are different from those of the surface light ones. (C) 2011 Elsevier Ltd. All rights reserved.