基坑降水引发的沉降理论计算及预测研究

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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

在基坑开挖过程中，若地下水高于开挖深度，降水处理是必要的，且受地下水赋存条件影响，基坑降水很易碰到潜水、承压水共存的情况；同时，基坑降水会引发土体沉降变形，开展其理论计算是必要的，且为掌握基坑沉降的发展规律，开展其变形预测也尤为重要[1-2]。（剩余6973字）