陆域吹填段地面沉降及管道应力响应特征研究  

Study on land settlement and pipeline stress response characteristics in land reclamation area

作　　者：张树中 唐骏琪 房晓燕 何振楠 梁法春[3] Zhang Shuzhong;Tang Junqi;Fang Xiaoyan;He Zhennan;Liang Fachun(SINOPEC Zhongyuan Petroleum Engineering Design Co.,Ltd.,Zhengzhou 450000,China;Henan Natural Gas Sales Center,Gas Branch,SINOPEC,Zhengzhou 450000,China;China University of Petroleum(East China),Qingdao 266580,China)

机构地区：[1]中石化中原石油工程设计有限公司,河南郑州450000 [2]中国石化天然气分公司河南天然气销售中心,河南郑州450000 [3]中国石油大学(华东),山东青岛266580

出　　处：《能源与环保》2024年第2期89-94,共6页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：国家自然科学基金面上项目(52176165)。

摘　　要：沿海地区陆域吹填段易发生不均匀沉降,软土地基上敷设管道易发生应力集中进而引发事故。基于有限元法建立天津南港工业园区三维沉降模型,使用固体力学方程以及摩尔—库仑准则表征管土相互作用机制,对地面沉降情况以及新管道敷设和投产时管道的应力响应特征进行研究。研究结果表明,人工填海区域的不均匀沉降程度与填土物性以及海相沉积层表面不平整的天然泥面具有显著的相关性。新管道投产后,已建管道顶部及底部应力下降了约2 MPa,但相邻侧等效应力增长了约4.5 MPa,并行敷设管道的相邻一侧管壁所受的应力较大。研究结果有助于认清研究区域沉降趋势,为软土地基管道应力监测方案制定提供了科学依据。The land reclamation area in coastal areas is prone to uneven settlement,and laying pipelines on soft soil foundations is prone to stress concentration and accidents.This paper established a three-dimensional settlement model based on the finite element method for Tianjin Nangang Industrial Park.The interaction mechanism between pipes and soil was characterized using the solid mechanics equation and the Mohr-Coulomb criterion.The land settlement situation and the stress response characteristics of new pipeline during installation and production were analyzed.The results showed that the degree of uneven settlement in the artificial reclamation area was significantly correlated with the fill material properties and the uneven natural mud surface of the marine sediment layer.After the new pipeline was put into operation,the stress at the top and bottom of the constructed pipeline decreased by about 2 MPa,but the equivalent force on the adjacent side increased by about 4.5 MPa.The stress on the adjacent side of the pipeline of parallel laid pipes was greater than that of other locations.The results of the study are beneficial to identify the settlement trend in the study area and provide a scientific basis for the development of stress monitoring programs for soft ground pipelines.

关 键 词：有限元 LNG管道 数值模拟 沉降量预测 非均匀沉降 

分 类 号：TE88[石油与天然气工程—油气储运工程]