淺埋公路隧道圍巖壓力計算方法及開挖過程受力分析.pdf

1、河北工業(yè)大學(xué)碩士學(xué)位論文淺埋公路隧道圍巖壓力計算方法及開挖過程受力分析姓名：韓倩申請學(xué)位級別：碩士專業(yè)：結(jié)構(gòu)工程指導(dǎo)教師：竇遠(yuǎn)明201012淺埋公路隧道圍巖壓力計算方法及開挖過程受力分析iiCALCULATIONMETHODOFSURROUNDINGROCKPRESSURESTESSANALYSISOFEXCAVATIONFSHALLOWHIGHWAYTUNNELABSTRACTChinaisamountainoushillycount

2、rywithChina’seconomicdevelopmentthetransptofmountainousareasdevelopsquicklymememountainroadtunnelshavebeenconstructed.InrecentyearstherehavebeenseverallargenaturaldisastersinChinasuchasWenChuanearthquakeYuShuearthquakehi

3、ghwaytunnelsarealsodamagedseriously.Thesurroundingrockofshallowtunnelsusuallyhaslowerstrengthit’sdifficulttofmanaturalarchintheexcavationsoshallowtunnelsareunstable.Thecalculationofshallowtunnelsaredifferentfromthedeeptu

4、nnelsthemaintheiesarethesoilcolumnmethodtheTaiShajitheythemethodinthedesignofroadtunnel.It’seasytoproducetheslidingsurfacehasplasticdefmationintheprocessofshallowtunnel’sexcavationsothestressanalysisisparticularlyimptant

5、.Themainwkofthispaperisasfollowing:1.ItestablishsthefinitedifferencecalculationmodelusingtheFLAC3DsoftwareAccdingtothegeologicalconditionofZhaojiagoutunnel.Itincludesfourmodelsofdifferentdepthitusesstaticanalysishastheco

6、mparativeanalysisftheplasticzoneofthemodelgetstheresultsthatthevaultarcharedeterminedtothemostsusceptibletotensionshearfailure.2.Ithastheanalysiscomparisonofeachmodel’sverticalstressshearstressintheexcavation.Theendofthe

7、mainarchvaultaretensionfailurethelumbararchiscompressivefailure.Thehencethefootofarcharelikelyoccurshearfailure.Greaterdepththegreaterthestress.3.Ithastheanalysiscomparisonofeachmodel’sverticaldisplacementintheexcavation