击实粘土固结前后孔隙压力系数的变化及对强度特性的影响  

Pore Pressure Parameter of Compacted Clay Consolidation and its Effect on Strength Properties

作　　者：王志玲[1] 方涤华[1] 吕洪予[1] 

机构地区：[1]郑州工学院化工部基础工程检测中心,河海大学岩土及地质工程系,黄河水利出版社

出　　处：《岩土工程学报》1996年第2期47-54,共8页Chinese Journal of Geotechnical Engineering

摘　　要：本文主要探讨了去实粘土团结前后孔隙压力系数Ｂ值的变化及其对强度特性的影响。试验结果表明，团结前Ｂ值接近１的试样，团结后在不排水状态下承受周围压力增量时Ｂ值小于１，这将引起土体抗剪强度增加；使抗剪强度不能表示为剪前试样承受的有效应力的线性函数；Ｂ值与饱和度Ｓｒ的关系国测试条件不同而不同。本文还对三轴仪底座及试样帽漏水对试验结果的影响，以及影响团结排水量量测和孔隙压力系数Ｂ的因素进行了分析。Changes of POre pressure parameter B of the compacted clay sample before and after consolidation and itseffect on strength properties are dealt with in this paper. Test results show that the test sample with B = 1 beforeconsolidation will give B< 1 after consolidation, so its shear strength increases nonlinearly with the consolidationstress. And the relationship between B and Sr varies with the testing condition. Besides, the dripping effect oftriaxial apparatus base and sample cap on test results and the factors which affect consolidation drainage measurementand B-paramater are also analysed in this paper.

关 键 词：粘土 孔隙压力 固结 排水量 抗剪强度 

分 类 号：TU442[建筑科学—岩土工程]