摘要
本文针对四川某一电站土石坝工程的心墙料——冰碛土进行了一系列的试验研究。研究表明:随着围压力的升高,冰碛土的强度降低,强度包线为折线型式;平面应变的试验强度高于常规三轴的试验强度,文中提出了二者的转化关系式。
A Series of tests including conventional triaxial tests,large scaletriaxial tests(σ_3=98-2940KN/M^2),and plane strain tests is carried out for the glacial till to be used as core material in rockfill dam.It is observed that the strength indix (?) of the till decreases with increasing ambient pressure,about 6-7 degrees.A broken line is suggested for the strength envelope instead of the Mohr-Coulomb line in the range of experimental pressure.The internal friction angles from conventional triaxial tests are shown 3-4 degrees lower than those from plane strain tests.The relationships between the strengths from the two kinds of strain codition are set up.
基金
国家自然科学基金资助课题
关键词
冰碛土
应力应变
强度
内摩擦角
glacial till
stress-strain
eternal friction angles
