非滑道区LNG组块建造地基不均匀沉降分析  

Uneven Settlement Analysis of the Foundation of LNG Modules Constructed in Non-Slideway Zone

作　　者：石继程[1] 孟珣[2] 刘宇婕[1] 徐学军[1] 田会元 

机构地区：[1]海洋石油工程(青岛)有限公司,山东青岛266000 [2]中国海洋大学工程学院,山东青岛266100

出　　处：《海岸工程》2015年第3期24-32,共9页Coastal Engineering

基　　金：国家自然科学基金项目--深水大兆瓦风机新型浮式支撑结构关键技术及多准则决策研究(51309209)

摘　　要：针对既有海工场地非滑道区大型LNG组块一体化建造需求,根据场地地基历史检测勘察资料和拟建组块特点,采用有限元参数化建模技术(ANSYS-APDL)模拟了地基非线性应力应变关系及项目整体建造过程中地基沉陷状态,通过敏感性分析确定复杂土体参数对地基沉降的影响程度,用以指导参数选择。研究表明:非滑道区场地地基不均匀沉降会对大型结构的建造存在影响,其主要地基影响参数为场区第一层土的弹性模量和基础荷载量级。通过数值模拟手段获取建造过程中地基沉降的相对不均匀性参数既可以与实测结果进行比较,又可以获取预报值用以及时指导施工安装及临时加固措施。According to the demands of integrated construction of large-scaled LNG modules in non-slideway zone at marine construction site,and based on the historical foundation data and the features of the modules to be constructed,the finite element analysis with parametric modeling technology（ANSYS-APDL） is conducted to simulate the nonlinear stress-strain relationship and the settlement state of the foundation in the whole stage of model construction.For guiding the selection of parameters,the influence of the complicated parameters of soil mass on the foundation settlement is determined through sensitivity analysis.The results indicate that the uneven settlement of the foundation in the non-slideway zone could influence the construction of large-scaled structures.The major influencing factors are the elastic modulus of the 1st soil layer and the load pressure of foundation.The relative inhomogeneity of the foundation settlement occurring in the construction and obtained by means of numerical simulation can either compare with the measured results,or acquire the prediction values of foundation settlement,so that the installation and temporary reinforcement can be guided in time.

关 键 词：ANSYS参数化设计语言 非滑道区 地基 不均匀沉降 液化天然气储存装置 

分 类 号：U656.1[交通运输工程—港口、海岸及近海工程]