CAJ | 학술논문

对6种含水率、4种不同围压条件下的灰土试样进行了室内不固结、不排水的三轴试验，探讨了不同含水率试样适用的本构模型及其强度变化规律。试验结果表明：灰土的脆塑性受含水率和围压共同制约，不同含水率情况下，灰土的应力-应变关系有着不同的形式，在含水率较低时可采用胡克模型，含水率较高时采用邓肯-张模型更为合理，这一含水率界限应在塑限附近；三七灰土的强度参数均可由含水率和围压给出；所得结论可为三七灰土工程数值模拟计算提供参考，具有工程应用价值。
대6충함수솔、4충불동위압조건하적회토시양진행료실내불고결、불배수적삼축시험，탐토료불동함수솔시양괄용적본구모형급기강도변화규률。시험결과표명：회토적취소성수함수솔화위압공동제약，불동함수솔정황하，회토적응력-응변관계유착불동적형식，재함수솔교저시가채용호극모형，함수솔교고시채용산긍-장모형경위합리，저일함수솔계한응재소한부근；삼칠회토적강도삼수균가유함수솔화위압급출；소득결론가위삼칠회토공정수치모의계산제공삼고，구유공정응용개치。
In order to investigate the suitable constitutive model of different moisture content samples and intensity variation,authors designed multiple unconsolidated and undrained triaxial tests of 6 kinds of moisture contents and 4 different confining pressures.The test results show that brittleness and plasticity of lime-loess is influenced by moisture content and confining pressure actually,the stress-strain curve changes with the variation of moisture content,Hooke model is applicable when the moisture content is low,on the contrary,Duncan-Chang model can be only used in a situation of high moisture content,this boundary of moisture content should be near the plastic limit based on those tests,and strength parameters can be given by moisture content and confining pressure. The conclusions can provide a reference to the numerical simulation of three-to-seven lime-loess,and have great significance in application engineering.