吸力锚负压沉贯渗流场有限元分析  

Finite Element Analysis of Seepage During Installation of Suction Anchor

作　　者：程光明[1] 段梦兰[1] 郭磊[1] 曾霞光[1] 张新虎[1] 王飞[2] 

机构地区：[1]中国石油大学(北京)海洋油气研究中心,北京102249 [2]中海油田服务股份有限公司,河北廊坊065201

出　　处：《石油矿场机械》2014年第1期20-24,共5页Oil Field Equipment

基　　金：国家自然科学基金项目"自升式钻井平台桩靴拔桩过程中非线性桩土作用机理研究"(51379214);国家科技重大专项"深水水下应急维修装备与技术"子课题"深水水下应急维修方法研究与半物理仿真系统研制"(2011ZX05027-005-001)

摘　　要：吸力锚的负压沉贯安装是其主要特征,对吸力锚承载能力的分析必须要考虑负压沉贯的影响。负压沉贯过程中,吸力锚内部和外部邻近区域土体内的孔隙水在水头差作用下,产生渗流场。由于渗流的作用,土体强度可能发生变化,研究吸力沉贯过程中的渗流现象具有重要意义。通过将有限元分析结果与其他学者的试验结果进行对比分析,指出负压安装过程中影响吸力锚内部水力梯度的因素,并分析了渗流对于土体性质的影响规律。Using suction for installation is the main character of suction anchor. It is important to consider the affection of suction operation on the bearing capacity of the installed anchor. The difference of water head causes the pore water to flow in the void of the soil. The seepage can de-grade the strength of the soil. So it is important to work on the seepage phenomenon. The FEM is used to analyze the distribution of pore pressure and seepage field in the soil. It is showed that the highest seepage velocity is at the tip of the anchor and can reduce the end resistance during instal-lation. The soil in the anchor is loosen by the upward seepage and cause the reduction of installa-tlon resistance,

关 键 词：吸力锚 负压沉贯 渗流 水力梯度 

分 类 号：TE953[石油与天然气工程—石油机械设备]