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1、合肥工業(yè)大學(xué)碩士學(xué)位論文柔性支護(hù)深基坑的有限元模擬分析姓名:潘鋒申請學(xué)位級別:碩士專業(yè):巖土工程指導(dǎo)教師:王國體20090301柔性支護(hù)深基坑的有限元模擬分析摘要隨著當(dāng)前我國經(jīng)濟(jì)的不斷發(fā)展及城市化進(jìn)程的加速,地下結(jié)構(gòu)的發(fā)展使得深基坑工程的位置尤為重要。保證基坑工程的安全性具有重要的經(jīng)濟(jì)和社會效益。傳統(tǒng)的基坑維護(hù)結(jié)構(gòu)計算方法如等值梁法、靜力平衡法、二分之一分割法大都建立在先有墻后填土的極限平衡的基礎(chǔ)上。這類方法在一般的擋土墻計算中得到了廣泛應(yīng)用。但對于在當(dāng)前基坑工程普遍使用的柔性支護(hù),該法顯然存在不少缺陷。在此基礎(chǔ)上發(fā)展而來的土抗力法,雖然克服了極限平衡法中的一些不足;是建筑基坑支護(hù)技術(shù)規(guī)
2、程中推薦使用的方法,土體彈簧剛度值的取法也積累了一定的工程經(jīng)驗(yàn),但由于每類土的上下限相差很大,選用時的任意性也大,勢必影響計算結(jié)果的準(zhǔn)確性。本文以某軟土地區(qū)深基坑為實(shí)例:運(yùn)用有限元軟件MIDAS/GTS模擬分析各個施工階段作用于維護(hù)結(jié)構(gòu)上的土壓力及維護(hù)結(jié)構(gòu)的變形情況,并以實(shí)測數(shù)據(jù)的為依據(jù),與有限元數(shù)值模擬的相對比,以期進(jìn)行合理性分析,為今后同類工程的設(shè)計與施工提供借鑒,具有實(shí)際工程的參考意義。關(guān)鍵詞:柔性支護(hù)深基坑變位方式有限元FiniteElementAnalysisofFlexibleSupportingintheDeepExcavationABSTRACTWiththecurren
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7、ricalsimulationandcomparison,inordertorationali夠analysisforsimilarprojectsinthefutureandprovidereferenceforthedesignandconstructionofpracticalengineering,thereferencesignificance.Keyword:flexiblesupportingstructuredeep