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1、第59卷第8期鐵道標(biāo)準(zhǔn)設(shè)計(jì)V0I.59No.82015年8月RAILWAYSTANDARDDESIGNAug.2015文章編號(hào):1004—2954(2015)08—0122—05車輛荷載對基坑支護(hù)結(jié)構(gòu)的影響分析唐麗云,邱培勇,葉萬軍,楊更社(西安科技大學(xué)建筑與土木工程學(xué)院,西安710054)摘要:為了研究車輛荷載對基坑支護(hù)結(jié)構(gòu)體系的影響,針對常規(guī)等效代換土層厚度法未考慮破裂棱體破裂角變化問題,引入改進(jìn)等效代換土層厚度法,依據(jù)庫倫土壓力理論,計(jì)算破裂棱體自重,結(jié)合破裂棱體平衡關(guān)系式,循環(huán)迭代得到破裂角收斂值,根據(jù)此破裂角換算得到新的土層厚度?;诘罔F車站基坑工程,通過
2、數(shù)值模擬,采用常規(guī)方法和改進(jìn)的等效代換土層厚度法研究車輛荷栽對基坑支護(hù)結(jié)構(gòu)的影響,分別得到支護(hù)結(jié)構(gòu)的水平位移曲線。研究表明,破裂角變化會(huì)引起代換土層厚度變化,從而影響計(jì)算精度;在基坑支護(hù)結(jié)構(gòu)設(shè)計(jì)中,采用改進(jìn)等效代換土層厚度法來考慮車輛荷載影響是可行的。關(guān)鍵詞:交通荷栽;基坑支護(hù);改進(jìn)等效代換土層厚度法;穩(wěn)定性中圖分類號(hào):TU443文獻(xiàn)標(biāo)識(shí)碼:ADOI:10.13238/j.issn.1004—2954.2015.08.026AnalysisoftheInfluenceofVehicleLoadonDeepExcavationSupportingStructureTA
3、NGLi—yun,QIUPei—yong,YEWan—jun,YANGGeng—she(SchoolofArchitectureandCivilEngineering,Xi’anUniversityofScience&Technology,Xi’an710054,China)Abstract:Inordertoanalyzetheinfluenceofvehicleloadondeepexcavationsupportingstructure,theconventionalequivalentthicknessofsoillayermethodisintroduce
4、d,andtheproblemofthechangeofruptureanglecausedbyvehicleloadsisaddressed,andanimprovedmethodisintroducedtosolvethisproblem.ThedeadweightofrupturemassiscalculatedaccordingtoCoulomb’Searthpressuretheory.Theconvergencevalueofruptureangleisobtainedbymeansofcirculativeiterationwithreferencet
5、otheequilibriumrelationwheretherupturemasskeepsanequilibriumstate,andthethicknessofthenewsoillayeriscalculatedbasedontheruptureangle.Inthelightofthefoundationpitofmetrostationinacity,andtheinfluenceofaconventionalmethodandtheimprovedequivalentlayermethodonsupportingstructurearecompared
6、bysimulation.a(chǎn)ndthecurvesofhorizontaldisplacementsareobtained.Theresultsindicatethatthechangeofruptureanglewillcausethechangeoftheequivalentthicknessofsoillayer,and,asaconsequence,thecalculationaccuracyisaffected.Itisapplicabletoemploytheimprovedequivalentthicknessofsoillayermethodtoad
7、dresstheinfluenceofvehicleload..Keywords:Vehicleload;Deepexcavationsupportingstructure;Improvedequivalentthicknessofsoillayermethod;Stability收稿日期:2014—10—27基金項(xiàng)目:陜西省重點(diǎn)科技倉4新團(tuán)隊(duì)計(jì)劃(2014KCT30);陜西省科技統(tǒng)籌創(chuàng)新工程(2011KTZ03-02-O1)作者簡介:唐麗云(1977一),女,副教授。[7]馬建新,李永林,謝紅強(qiáng).高寒地區(qū)隧道保溫隔熱層設(shè)防厚度的研[10]范東方,夏才初,韓常領(lǐng)