CAJ | 학술논문

为研究冻融循环作用对纤维土抗剪强度的影响，以东北季冻区的某工程黏土为研究对象，通过正交试验，分析纤维掺量、纤维长度、冻融循环次数3个因素对聚丙烯纤维土抗剪强度的影响规律，经过综合分析得到纤维长度为9 mm，纤维掺量为3‰的最佳组合方案；通过对比试验得出冻融作用下纤维土抗剪强度指标的变化规律。研究结果表明：纤维土黏聚力较素土有一定的提升，且提升效果随冻融次数的增加更显著；内摩擦角随冻融次数的增加出现先增大后减小的现象。
위연구동융순배작용대섬유토항전강도적영향，이동북계동구적모공정점토위연구대상，통과정교시험，분석섬유참량、섬유장도、동융순배차수3개인소대취병희섬유토항전강도적영향규률，경과종합분석득도섬유장도위9 mm，섬유참량위3‰적최가조합방안；통과대비시험득출동융작용하섬유토항전강도지표적변화규률。연구결과표명：섬유토점취력교소토유일정적제승，차제승효과수동융차수적증가경현저；내마찰각수동융차수적증가출현선증대후감소적현상。
In order to study the influence of the freeze-thaw cycle effect on fiber soil shear strength,the engi-neering clay in seasonal frozen northeast area was taken as the research soil.Through orthogonal tests,the effects of fiber content,fiber length,freezing and thawing cycles times on polypropylene fiber soil shear strength were ana-lyzed.The best combination of polypropylene fiber soil under the effect of freezing and thawing was determined with fiber length being 9mm and 3 ‰fiber dosage through comprehensive analysis of test data.Through the con-trasting tests the change rule of fiber soil shear strength index was obtained under the freeze-thaw cycle.The anal-ysis results show that the fiber soil with the optimal combination scheme has a certain improvement in cohesion, and the enhancement effect is more obvious with the increase of the time of freezing and thawing.However,the in-ternal friction angle appears to first increase and then decrease with the increase of time of freezing and thawing.