软土地基海堤沉降的有限元模拟
摘要:围涂工程的海堤直接坐落在软土地基上,致使地基土受到挤淤、排水固结,产生了较大的沉降量。当前计算海堤沉降基本上按照规范规定以分层沉降总和法为主,辅以软土修正系数,对工后沉降要求结合固结计算和类似工程经验等综合分析确定,对不同的设计人员往往会产生较大的计算误差。如何准确判断海积软土在海堤荷载作用下的沉降变形往往是堤防建造和围海造地等重大工程中的关键环节。为研究海积软土的变形特性,在室内试验和实测沉降的基础上,采用plaxis有限元软件对实际的工程项目全过程施工的模拟,认为采用粘性土弹塑性模型对堤坝沉降变形进行平面应变情况的模拟,沉降模拟跟实测比较接近,并能很好地模拟工后沉降,能解决由经验判断产生的较大误差。
Abstract:Reclamation seawall project is located in the soft ground directly, which Caused the compaction of thefoundation soil, consolidation of drainage and resulting in a larger settlementindex Current calcuIations of the seawall settlement is largely based on the specification datas which mainly uses the sum of layer deposition methods, supplemented by soft soil correction factors. And also combined with comprehensive analysis of the settlement after the consolidation of computing and other similar engineering experience. Different designers tend to have different calculation results. How to determine marine soft soil in the seawall settlement deformation under load accurately is always the major key of the construction and land reclamation projects. In order to investoigate the deformation characteristics of marine soft soil, Basedon the laboratory tests and measured settlement, the author by used Plaxis finite element software to simulate the whole process of the actual projects construction. The author find that usling the elastic-plastic model to simulate plane strain deformation of clay dam settlements, simulation results are close to the measured settlement, and also could simulate the post-construction settlements for future purpose,It also can resolve the large errors resulting bv the exDerienee judgement.
中文标题：
软土地基海堤沉降的有限元模拟
Finite Element Simulation on Settlement of Soft Seawall
作者：
金德钢
Jin Degang
作者简介:金德钢,1969年生,男,浙江宁海人,工学学士,教授级高级工程师,从事水利水电工程规划设计。E-mail:nbjdg@126.com
通讯地址：
宁波市水利水电规划设计研究院, 浙江宁波 315192
NingboWaterConservancyandHydropowerPlanningandDesignInstitute,Ningbo315192,Zhejiang,China
中图分类号:TU433
doi:10.3969/j.issn.1007-2993.2012.01.010
出版物：岩土工程技术
收稿日期:2011-06-30
网络出版日期:2021-07-06
关键词:软土地基,海堤沉降,有限元法
Key words:seawall,settlement,finite element simulation
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