岩土工程学报2016，Vol.38Issue(8)：1407-1416,10.DOI:10.11779/CJGE201608007
柱状节理岩体渗透性模型试验研究
Modeltests on permeability of columnar jointed rock mass
摘要
Abstract
Because of the lack of researches on the permeability of the columnarjointed rock mass, modeltests on the similar material of columnar jointed rock massare carried out to study their permeability during cyclicloading and unloadingof confining pressure.It is shown that the equivalent medium model is suitable for analysis of the permeability of columnar jointed rock mass.The method for calculatingthepermeability tensorofcolumnar jointed rock massis proposedbased onthetensor invariant theory.The researches show that themajor permeability coefficient of the permeability tensorof columnar jointed rock massissignificantly reduced during the first loading of confining pressure,andit maintainsalow value during the subsequent cyclic loading and unloading of confining pressurestage. The relationshipbetween themajor permeability coefficient of permeability tensorand the confining pressure is power function relationship during each cyclic loading and unloading of confining pressure stage. The major direction ofthepermeability tensor ofcolumnar jointed rock mass increases gradually along withtheloading and unloading of confining pressure.It increases significantly during the first confining pressure loading stage,butitsincrease becomes slow during the subsequent cyclic loading and unloading of confining pressure stage. The permeability anisotropy ofcolumnar jointed rock massunder low confining pressure is more significant, and it decreases alongwith the increase of cylinder angle.The permeability anisotropy ofcolumnar jointed rock massdecreases rapidly along with the increase of confining pressure during the first confining pressure loading stage, and cylinderangle has little impact onthepermeability anisotropy of columnar jointed rockmassduring high confining pressurestage.The permeability anisotropy of columnarjointed rock mass.关键词
柱状节理岩体/相似材料/渗透性质/各向异性/围压加卸载/模型试验Key words
columnar joint/similar material/permeability/anisotropy/loading and unloading of confining pressure/model test分类
建筑与水利引用本文复制引用
巢志明,王环玲,徐卫亚,贾朝军,夏季..柱状节理岩体渗透性模型试验研究[J].岩土工程学报,2016,38(8):1407-1416,10.基金项目
国家自然科学基金项目（11172090，11272113，51479049，11572110，51209075）；江苏省自然科学基金项目 （）
