基坑降水引發(fā)的沉降理論計算及預測研究

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PENGWei
(Shaanxi Railway Engineering Vocational and Technical Couage,Weinan 714OOo,China)
Abstract:Tofetivelgrasptedeforationlawoffoundatinpitsetlement,basedontegologicalconditionsoftefoundationpit, combinedwithteprincipleofectivestres,thelardomprehensiemetodisusedtoalcultetetoreticalvaueofslt causedbyfoundationpitprecipitation;Secondly,basedontheon-sitestlementmonitoringdataduringtheexcavationcostruction process,theaccuracyoftheoreticalcalculationvaluesissupportedbydeformationprediction.Theanalysisresultsshowthatithe theoreticalcalculaiesulsoffoundopitselemnt,thsemntteeticalalulatovausaetonggessra thesetlementmonitoringvalus,andteslementvaluesaveacotiuusdecreasingcharactesticatedistancefroteterf thedranagewellincreases;Interesearchesultsofpredictingfoundationpitsetlement,thaveragerelativeoroftepdicted results is between 2.02% and 2.09% ,indicating that ILSO-RVM-CT has strong predictive ability in predicting foundation pit settlement deformation,andthepreditoresultsowthatteselementdfoationoffoundationpitwilloiuetoinceaseatsalate, indicating that the settlement deformation of foundation pit tends to be stable.
Keywords:excavation dewatering;theoretical calculations;on site monitoring;deformation prediction
0 引言
在基坑開挖過程中,若地下水高于開挖深度,降水處理是必要的,且受地下水賦存條件影響,基坑降水很易碰到潛水、承壓水共存的情況;同時,基坑降水會引發(fā)土體沉降變形,開展其理論計算是必要的,且為掌握基坑沉降的發(fā)展規(guī)律,開展其變形預測也尤為重要[1-2]。(剩余6973字)