第７５卷第５期有色金属(矿山部分)２０２３年９月doi:１０３９６９/jissn１６７１Ｇ４１７２２０２３０５０１４不同条件下非饱和土中孔隙气压变化特征研究王帆１,徐啸川２(１桂林矿产地质研究院工程有限公司,广西桂林５４１００４;２中国地质大学(武汉)工程学院,武汉４３００７４)摘要:在研究土体内水的渗透行为时,通常直接采用压力表测量孔隙水压力.实际上压力表的测量值中包含了孔隙水压和孔隙气压.通常假设土体内的孔隙气压为０kPa,所以一般没有考虑孔隙气压的影响.然而,根据近年来的研究认为,土体内孔隙气压的上升可能会对降雨时的边坡破坏、雨水渗透等产生影响.因此,在本研究中,为了掌握不同条件(降雨条件、地下水条件、排气条件)下的孔隙气压情况,进行了雨水渗透情况下土体内孔隙气压的测量试验.结果表明,由于地表处于内涝状态,土体内的孔隙气压会上升,说明了降雨时测量孔隙气压是极为必要的.研究结果为弃土边坡的长期运行与监测预警提供一定的理论依据.关键词:土体;降雨;孔隙气压;孔隙水压;压力表中图分类号:TD８５４＋６文献标志码:A文章编号:１６７１Ｇ４１７２(２０２３)０５Ｇ００９８Ｇ０９VariationcharacteristicsofporepressureinunsaturatedsoilsunderdifferentconditionsWANGFan１,XUXiaochuan２(１．GuilinInstituteofMineralGeologyEngineeringCo．,Ltd．,GuilinGuangxi５４１００４,China;２．SchoolofEngineering,ChinaUniversityofGeosciences(Wuhan),Wuhan４３００７４,China)Abstract:Pressuregaugeisusuallyuseddirectlytomeasureporewaterpressurewhenstudyingtheseepagebehaviorofwaterinthesoil．Thegaugeactuallymeasuresbothporewaterpressureandporepressure．Itisusuallyassumedthattheporepressureinthesoilbodyis０kPa,sotheeffectofporepressureisnotconsideredingeneral．However,accordingtorecentstudies,itisbelievedthattheriseofporepressureinthesoilbodymayhaveanimpactonslopedestructionandrainwaterinfiltrationduringrainfall．Therefore,inthisstudy,inordertomastertheporepressureunderdifferentconditions(rainfall,groundwater,andexhaust),theporepressuremeasurementtestinthesoilbodyundertheconditionofrainwaterinfiltrationwascarriedout．Theresultsshowthat...
