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ID:35133334
大小:1.57 MB
页数:65页
时间:2019-03-19
《基于深基坑围护开挖与软土非线性流变研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、西安建筑科技大学硕士学位论文深基坑围护开挖与软土非线性流变研究姓名:刘二栓申请学位级别:硕士专业:岩土工程指导教师:韩晓雷;宋金才20040601l掰安建筑利技大学’1j;{!!};硕1卜学位沧叉深基坑围护开挖与软土非线性流变研究专业:岩土工程研究生:刘二栓导师:韩晓雷教授摘要{蝻建设中的深基坑开挖采用多种围护形式,施Ⅱ_产生的习i境病害(主要是坑外刚近地表土层不均匀沉降及工程施工对道路交通的干扰)预测及防治已有—些经验,但捌
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3、也不少。本文在已有研究成果的基础上,对大面积软±深基坑开挖时土层变位理论及应用进行了探讨:依据现场监测数据,推导出开挖时软土变形
4、的经验公式,分析了软士深基开挖在围护结构刚度大、基坑防渗效果好的条-M:-F,基坑土层变位、围护结构受力破坏发展的主要原因。运用岩土流变学的理论分析了沉降、躇螂开挖关系,并建立了与之相适应的软土非线H流变模型。用非线性流变有限元曰芋验证了结论的正确性。最后提出施工时j酣j监测数据预怕围护支撑的方法。本文将软土深基开挖实践与岩土力学理论紧密结合,部分研究成果对工程实际具有—定应用价值。[关踺词悃护结构环境扁害深基围护刑宅监测防渗j戡瞄:流变STUDyONDEEPFOUNDATIONENcLOSUREEXCAVATIONANDNONLINEARRHEOLOGY
5、驯印f丁c明.r翻粥Major:GeotechnicalEngineeringPostgraduate-L/uErShuanAdviser:Prores$orHartXiaoLeiABSTRACTThedeepfoundationexcavationtakesmanymethodsofenclosure面cityconstruction,Todaytherearesomeimmatureexperiencesandlotsofteachesontheprediction,prevetionandthecontrolofenvironmentaldetrim
6、entaleffects(mainlyunevensoilsetoutsidefoundationpitandeffectOncityscapetraffic.etc.)causedbydeepfotmdationexcavatiortco恤strtmtiontakeninma-nykindsofenclosurestructures.BasedoBtheresearchworksofp聆decessor,thetheofy啦thedisplacementofsoilstrataindeepfoundationexcavationconstructiona
7、nditsapplicationarestudied证detail.Byatml..ystngthesupervisionstatisticsfxomthepractical.excavationengineering,soilrheologyisthoughttobethemainreasonofthedisplacementheavyofthesoftsoilandthedestructionoftheenclosurestructure,indeepfoundationexcavationconstructiononconditionofthehig
8、htheriomorphicofenclosurestructureandgoodseepageresitting.TheexpericaIformulaofsoilsettlementinexcavationarealsoformulated.Usingthetheoryofsoilrheology,Therelationshipamongsettlement,plumpyandexcavation.ThenonlineartheologicalFEMprogrampertinenttoexoavatiouisalsoestablishedusedand
9、itsavaitabilityisprove8.Finaltytheme£hod醢s证gsupervisionstatisticsisrepresemedinexcavationconstruction,which辫edi吐the硝爱建筑丰嘻技夫学』_‘程硕士学位论文criticalaxialforceofbracinginenclosurestructure.Inthepaper,thetheoryofgeomechanicsandtheengineeringarecollaboratecoherently.Someresuhscanbeappliedt
10、oexcavationconstructionsinsonicde
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