基于摩尔-库伦模型的地下水对浅层平板载荷试验的影响分析

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中图分类号：TU470 文献标志码：A 文章编号：2095-2945（2025）31-0008-07

Abstract：Withthedevelopmentofurbanconstruction，softsoil foundationsareusedmoreandmore，andshallwplateload testsarewidelyusedinfoundationbearingcapacitytesting.TakingafactoryprojectinLonghuaDistrict，ShenzhenCityasan example，thispaperusesMohr-CoulombModelandPlaxis3Dsoftwaretostudytheimpactofgroundwateronshallowplateload tests.Experimentsandnumericalsimulationswerecarredouton9testsectionsbysetingthreeworking conditions：zero precipitation，mprecipitation，and1.5mprecipitationWhenthereisnoprecipitation，groundwaterreducesthebearingapacity ofthe foundation soil to about half of the design value;after 1m of precipitation，the bearing capacity is increased but some pointsstillfailtomeetthestandard;after1.5mprecipitationandincreasingtheelasticmodulusofthewater-freeresidualsoil layer，thebearingcapacitybasicallymetsthedesignrequirements.Atthesametie，itwasfoundthatprecipitationcanimprove thebearing propertiesofsoil，buttheloadingtimeislongandthedisplacementislargewhenprecipitationis1m，andthe loadingtimeisgreatlyshortenedwenprecipitationis1.5m.Thestudyalsoverfedthereliabilityofthenumericalsiulation method，and recommended that the groundwater level should be lowered by 1.5m and stayed static for more than 7 days before thetest.Thisstudycanprovideareliablebasisforengineringdesign，reduceengineringrisks，andensurethesafetyand stability of the construction project.

Keywords： Mohr-Coulomb Model; load test; groundwater; bearing capacity; engineering design

近年来，在中国国民经济持续高质量发展的背景下，超高层建筑、大型综合建筑群的数量与规模呈显著增长态势。（剩余6745字）