| 黏土中海底管线竖向贯入阻力研究 |
| |
| 引用本文： | 王腾,吴瑞.黏土中海底管线竖向贯入阻力研究[J].岩土力学,2019,40(3):871-878. |
| |
| 作者姓名： | 王腾 吴瑞 |
| |
| 作者单位： | 中国石油大学(华东) 石油工程学院，山东 青岛，266580 |
| |
| 基金项目： | 国家自然科学基金（No.51179201）；中央高校基本科研业务费专项资金项目（No.15CX05040A）。 |
| |
| 摘 要： |
|
| 关 键 词： | 表面隆起 管线 贯入阻力 耦合欧拉-拉格朗日法(CEL) 应变率效应 应变软化 |
| 收稿时间： | 2017-08-30 |
Study of vertical penetration resistance of seabed pipelines in cohesive soil |
| |
| WANG Teng,WU Rui.Study of vertical penetration resistance of seabed pipelines in cohesive soil[J].Rock and Soil Mechanics,2019,40(3):871-878. |
| |
| Authors: | WANG Teng WU Rui |
| |
| Institution: | School of Petroleum Engineering, China University of Petroleum, Qingdao, Shandong 266580, China |
| |
| Abstract: | The on-bottom stability of deepwater seabed pipelines is affected by the vertical penetration depth and resistance. In this study, the coupled Eulerian-Lagrangian approach (CEL) was used to simulate the vertical penetration of pipelines in cohesive soil, and the effects of strain rate behavior and strain softening on bearing capacity of pipelines were studied by subprogram VUSDFLD. The resistance provided by the heaved-soil on both sides of the pipeline during the penetration process was analyzed and the sensitivity analysis of the resistance was implemented, then a surface heave capacity factor was proposed. Results indicated that bearing capacity factor of the pipeline increases significantly with the increase of strain rate parameter. A high sensitivity of soil leads to a fast softening rate of soil and a low bearing capacity factor of pipeline. The surface heave capacity factor mainly depends on the submerged weight of the soil. Moreover, the greater the penetration depth, the more obvious the effect of the submerged weight of soil on the bearing capacity of surface heave. An expression describring the surface heave capacity is developed by fitting the numerical results. |
| |
| Keywords: | surface heave pipeline penetration resistance Coupled Eulerian-Lagrangian(CEL) strain rate strain softening |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
