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《群桩周围沉降场的计算方法》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、建材世界2014年第35卷S1doi:10.3963/j.issn.1674-6066.2014.S1.074群桩周围沉降场的计算方法李隽毅,贺翀(现代建筑设计集团上海申元岩土工程有限公司,上海200040)摘要:研究目的:城市密集的环境使得高层建筑越来越多,高层建筑群桩基础沉降对周边环境影响日益受到重视。但目前,群桩沉降计算方法多仅针对群桩自身沉降,而对群桩周围土体沉降研究较少。该文旨在建立一种方法,可通过群桩自身沉降推导群桩周围土体位移场,以便分析高层建筑物对周围环境的影响。研究结论:通过将群桩等代为一个大单桩,群桩对周围土体的作用可简化
2、为大单桩侧表面上的面荷载和分布在大单桩底面的面荷载。基于大单桩模型,可求得群桩自身沉降以及群桩周围的沉降场。对比分析了有限元方法与等代单桩方法的计算差异。提出了利用群桩自身沉降估算群桩周围地表沉降的沉降比方法。为验证该文方法,对上海某高层建筑的自身沉降和桩周土体沉降进行计算分析并与实测数据进行对比。结果表明等代单桩方法可以很好的计算群桩自身沉降以及群桩周围的沉降场,而沉降比方法可较好的利用已知桩基自身沉降来估算群桩周围的地面沉降。关键词:等代单桩;群桩沉降;沉降场;沉降比ThemethodsofSurroundingSoilSettlemen
3、tDistributionInducedbyPileGroupLIJun-yi,HEChong(ShanghaiShenYuanGeotechinalEngineeringCo,Ltd,Shanghai200040,China)Abstract:Reseachpurposes:Urbandevelopmentinvolvestheconstructionofhigh-risebuildingsthatrequiredeepfoundation.Theinfluenceoffoundationsettlementtonearbyenvironm
4、entwasfocused.Butmostfoundationsettle-mentpredictionmethodonlyfocusedonthebuildingitself.Therewasfewwaystocalculatethesurroundingsettle-ment.Inthepresentpaper,itisaimedtofurthertheunderstandingofgroundsubsidenceduetotheadditionalloadingofhigh-risebuildinggroups.Anewmethodto
5、analysisdisplacementdistributionofsinglepilegroupswasestablished.Reseachconclusions:Whilethepilegroupisequivalenttoabigsinglepile;theeffectonthesurroundingsoilhasbeensimulatedasthefaceloadingonsidesurfacesandbottomsurface.Basedonthemodelofthesinglepile,thepilegroupsettlemen
6、tandsettlementdistributionofsurroundingsoilareobtained.Thecomparisonoftheequivalentsinglepilemethodandfemhasbeendiscussed.Themethodofsettlementratiohasbeenintroducedwhichaimedtocalculatethegroundsettlementaroundthepilegroupbasedontheself-settlementofpilegroup.Usingthepresen
7、tmethods,thepilefoundationsettlementandsurroundingsoilsettlementwerecalculatedandcomparedwiththemeasurementdata.Itisverifiedthattheequivalentsinglepilemethodisaccuracyforcomputepilefoundationsettlementandsurroundingsoilsettlement.Atthesametime,thesettlementratiomethodcanbeu
8、sedformeasurethegroundsettlementinducedbypilegroupwhiletheself-settlementofpilegro
