CAJ | 학술논문

取季节性冻土区3种不同塑性指数路基土,通过对室内制备的试样在经历0～8次完整冻融循环过程后,统计试件体积冻胀率及高度冻胀率,得出如下结论：冻胀率随冻融循环次数增加而增大,相同冻融循环次数条件下,冻胀率随塑性指数增加而增大.对试验数据进行多元非线性拟合,建立不同塑性路基土冻胀率与塑性指数及冻融循环次数关系,拟合效果理想,可为缺乏冻胀率资料的季冻区路基设计及施工提供参考.
취계절성동토구3충불동소성지수로기토,통과대실내제비적시양재경력0～8차완정동융순배과정후,통계시건체적동창솔급고도동창솔,득출여하결론：동창솔수동융순배차수증가이증대,상동동융순배차수조건하,동창솔수소성지수증가이증대.대시험수거진행다원비선성의합,건립불동소성로기토동창솔여소성지수급동융순배차수관계,의합효과이상,가위결핍동창솔자료적계동구로기설계급시공제공삼고.
Three different plasticity index subgrade soils were selected from seasonal frozen soil region.Frost heaving ratio of volume and height was got on the samples exposed to 0 to 8 times closed-system freeze-thaw cycles.The results show that with the same kind of soil,the frost heaving ratio increases with the number of freeze-thaw cycles;Frost heaving ratio increases with plasticity index under the same number of freeze-thaw cycles.Multiple nonlinear fitting was adopted for test data.The relationship between frost heaving ratio and plasticity index,freeze-thaw cycles was obtained and showed a good correlation.The relation got can provide reference for subgrade design and construction in seasonally frozen soil region.