欢迎来到天天文库
浏览记录
ID:53273164
大小:316.70 KB
页数:6页
时间:2020-04-17
《吹填淤泥自重固结方程的有限差分解.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、第38卷第9期北京工业大学学报V0I_38NO.92012年9月JOURNALOFBEIJINGUNIVERSITY0FTECHN0L0GYSep.2012吹填淤泥自重固结方程的有限差分解张明,王威,赵有明,刘国楠,马东辉(1.河南工程学院土木工程系,郑州451191;2.北京工业大学抗震减灾研究所,北京100124;3.中国铁道科学研究院,北京100081;4.中国铁道科学研究院深圳研究设计院,深圳518034)摘要:考虑吹填淤泥落淤阶段以自重固结为主,以及自重固结过程中渗透系数及有效应力与体积分数之间的非线性关系,在合理假定条件下,推导了一维自重固结方程.采用Crank-Nic
2、olson型差分格式对方程进行离散,编制了差分数值解程序SFCCP,对落淤后自重固结过程中吹填淤泥孔隙比的变化进行了数值模拟,结果与现场测试结果较为吻合,验证了分析方法的合理性与差分数值解程序的正确性,同时为软基处理前落淤后吹填淤泥的土性参数提供了~种预测方法.关键词:自重固结;吹填淤泥;落淤;有限差分法;体积分数中图分类号:TU411文献标志码:A文章编号:0254—0037(2012)09—1310一O6FiniteDiferenceMethodSolutiononSelf-weightConsolidationEquationofDredgedFillZHANGMing,WA
3、NGWei,ZHAOYou.ming,LIUGuo—nan,MADong.hui(1.DepartmentofCivilEngineering,HenanInstituteofEngineering,Zhengzhou451191,China;2.InstituteofEarthquakeResistanceandDisasterReduction,BeijingUniversityofTechnology,Beijing100124,China;3.ChinaAcademyofRailwaySciences,Beijing100081,China;4.ShenzhenResear
4、chandDesignInstitute,ChinaAcademyofRailwaySciences,Shenzhen518034,China)Abstract:Consideringofself—weightconsolidationasthemaineffectduringself-weightdepositionandthenonlinearrelationshipbetweeneffectivestress,permeabilitycoeficientandsolidvolumefractionduringself-weightconsolidation,onedimens
5、ionself—weightconsolidationgoverningequationofdredgedfillwasestablishedbasedonsomereasonableassumptions.ThenewequationwasdiscretedbytheCrank—NicolsondifferenceformatandsolvedbythefinitedifferencenumericalsolutionSFCCPcomputingprogram.Numericalsimulationofthevoidratiofordredgedfillwasconductedb
6、ytheSFCCPcomputingprogramduringself—weightdeposition.Itshowsthatthevoidratioresultsbasedonthenewmodelareclosetotheresultsfromin—situtests,thattherationalityoftheanalyticalmodelandcorrectnessoffinitediferencenumericalsolutionprogramarevalidated.Thenewequationcanalsoprovideafavorablepredictionon
7、physicalmechanicalindicesforself—weightdeposition.Keywords:self—weightconsolidation;dredgedfill;self—weightdeposition;finitedifferencemethod;solidvol11mefractjOn收稿日期:2010—10—17.基金项目:国家科技支撑计划项目资助(2009BAJ28B04).作者简介:张明(1979一),男,讲师,主要从事软土固
此文档下载收益归作者所有