Laboratory Study and Analysis on the Effect of Internal Water Pressure on the Karstic Rocks Stress Conditions

Electronic journal of geotechnical engineering

Omid Azadegan¹  G.R Pourebrahim² 

[1] Ph.D. student of Geotechnical EngineeringShahid Bahonar University of Kerman, Iran;Assist. Professor, Faculty of Civil Engineering Dept.Shahid Bahonar University of Kerman, Iran.

关键词: compressive stress;    shear stress;    elliptical hollows;    the uniformity pressure.;   

DOI  :  

来源: Oklahoma State University

【 摘 要 】

Whenanychangesimposetowatertableandinternalwaterpressureofkarsticareaswhichactaswateraquifersandundergroundreservoirs,someproblemslikeinstability,generalcollapses,giantsettlementsandmanyotherphenomenawouldhappenduetothekarsticrockmassesfailure.Therefore,analysisofinternalstressesinrockmassesinsuchcaseswouldbereallyhelpfulinpreventinganydisasters.Thisstudyhasconsideredtheanalysisofinternalcompressive,tensileandshearstressesofarockcubicelementcomprisinganellipticalhollowwithinternalhydrostaticpressure.Then,inordertoclarifytheeffectofwaterpressureinsidethekarstichollows,asimplifiedmodelhasbeencarefullyanalyzedandalaboratorysimulationhasbeenperformedonanalyzedmodel.Thestudyresultsshowthatreductionofinternalwaterpressurewouldleadtodecrementinbearingcapacityandcompressivestrengthofrockmasseswithhollows.Ontheotherhand,iftheinternalpressureincreasestheamountoftensionswouldalsoimproveandmayleadtotensilefailureandprogressionofcracksinrockmasses.

【 授权许可】

Unknown