摘要
根据三峡工程永久船闸区岩体结构面及地下水调查和观测结果 ,提出了渗透结构面这一基本术语 ;据此开发出求解处于施工期的岩体工程岩体渗透张量的基本方法。利用此方法所得到的永久船闸区岩体渗透张量数量级与多年来的现场测试成果相同 ,而由K1、K2 和K3体现出来的渗流各向异性更为典型 ,与近期开挖显现出的情况是吻合的。
Itiswellknownthatpermeabilityisakeyprobleminthecourseofseepageanalysistoadomain .Onthebasisofobservationsin_situatpermanentshoplocksoftheThree GorgesProjecttheauthorsdevelopanewmethodtosolverockmassseepagetensorin constructinginthispaper.Themethodincludestwosteps,oneistosolveinitialseepagetensorusingWCF (Water_ConductionFracture) ,theotheristosolveequivalentpermeability tensorusingFEMtakingseepageflowascontrolvariablebasedoninitialseepagetensor.ThemethodiseffectiveinrockmassengineeringinconstructingsuchastheThreeGorges Project. Themethodisfoundedoninvestigationsindetailin_situ .WCFcanbeidentified reasonablythroughobservationsin geologic prospecttunnel,draintunnelandcuttingsurfaces.AnyWCFhascertainfeaturessuchasaperture,length ,permeabilityandfrequencyetc.WedivideWCFatpermanentshiplocksoftheThreeGorgesProjectinto 1 1sets. PermeabilityeverysetWCFisnear 0 .0 1centimetereverysecond .Duetoconstructingblast androckunloadingimpactobviouslyoninitialpermeabilitytensor,ratiobetweenequivalent permeabilitytensorandinitialpermeabilitytensorisonly 0 .2 .InweakweatheringareaandbeyondblastandunloadingregionK1∶K2 ∶K3 =1 1∶1 0∶1 ,therforerockmassthereare anisotropy,whichhavebeenverifiedthroughrockmassaftercuttingofshiplocksand tunnels.
出处
《山地学报》
CSCD
2000年第1期47-51,共5页
Mountain Research
基金
国家自然科学基金!资助项目 ( 5 98780 5 7)成果之一
关键词
三峡工程
永久船闸
边坡
岩体
渗透张量
地下水
TheThreeGorgesProject,permanentshiplocks,rockmass,water_conduction fracture(WCF) ,seepageflow ,permeabilitytensor
