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《地基應(yīng)力對土基剪切波速的影響建?！酚蓵T上傳分享，免費在線閱讀，更多相關(guān)內(nèi)容在學術(shù)論文-天天文庫。
1、第49卷第4期2017年8月南京航JournalofNanjingDOI：10．16356／j．1005—2615．2017．04．016空航天大學學報UniversityofAeronautics&Astronautics地基應(yīng)力對土基剪切波速的影響建模張宇輝張獻民(中國民航大學機場學院，天津，300300)V01．49No．4Aug．2017摘要：地基剪切波速與土基密實程度直接相關(guān)，廣泛應(yīng)用于場道地基壓實質(zhì)量評估?，F(xiàn)有剪切波速測試模型主要考慮干密度、含水率等因素，忽略了土基應(yīng)力對剪切波速的影響，導致利用剪切波
2、速測定高深度及大應(yīng)力狀態(tài)土層力學性能時存在較大誤差。本文設(shè)計了土基應(yīng)力與剪切波速試驗裝置，開展了變應(yīng)力條件下粘土和砂土兩種土樣的剪切波速試驗，研究了土顆粒應(yīng)力傳播及應(yīng)力損失條件下剪切波速變化特性，建立了基于應(yīng)力擴散的地基土剪切波速與土中應(yīng)力相關(guān)性模型，并對模型計算結(jié)果與現(xiàn)場實測數(shù)據(jù)進行對比分析，以驗證模型的有效性。結(jié)果袁明：土基剪切波速隨應(yīng)力的增大總體呈增大趨勢；應(yīng)力相等條件下，土體剪切波速隨測試土層厚度的增大而下降，地基應(yīng)力對土基剪切波速影響顯著。關(guān)鍵詞：剪切波速；地基應(yīng)力；應(yīng)力擴散；相關(guān)性模型；壓實質(zhì)量中圖分
3、類號：TU458文獻標志碼：A文章編號：1005—2615(2017)04-0561-07ModelingStudyonInfluenceofFoundationStressonShearWaveVelocityofSubgradeSoilZHANGYuhui．ZHANGxianmin(SchoolofAirport，CivilAviationUniversityofChina，Tianjin，300300，China)Abstract：Thefoundationshearwavevelocityisdirect
4、lyrelatedtothesoilcompactness，andisadoptedtoevaluatethepavementsubgradecompactionqualitygenerally．Thedrydensityandwatercontentareconsideredintheexistingtestmodelofshearwavevelocitywhilefoundationstressisnotconsidered，whichcausesamountoferrorsinsoilmechanicalp
5、ropertytestingundertheconditionofhighdepthandlargestressusingshearwavevelocity．Inthispaper，testapparatusoffoundationstressandshearwavevelocityisdesigned，andchangefeaturesofshearwavevelocityunderconditionsofstressspreadingandstresslossingamongsoilparticlesares
6、tudiedbytestingshearwavevelocityofclayandsandysoilwithchangingstress．Thecorrelationmodeloffoundationstressandshearwavevelocitybasedonstressdif—fusionisbuilt．Themodelcalculatingconsequenceandfieldtestingdataarecontrastivelyanalyzed，andtheeffectivenessofmodelis
7、confirmed．Theresultsshowthattheshearwavevelocityoffoundationin—creaseswiththeincreasingofsoilstress，thevelocitydecreaseswiththeincreasingthicknessoftestsoillayerinconditionofidenticalstress，andthesoilshearwavevelocityissignificantlyaffectedbyfounda—tionstress
8、．Keywords：shearwavevelocity；foundationstress；stressdiffusion；correlationmodel；compactionquality基金項目：國家自然科學基金(60879021)資助項目；中央高?？蒲谢?3122014D028)資助項目；博士科研啟動基金(2012QD24x)資助項目；中國民航大學校內(nèi)開放基金(J
