冻融作用下纤维加筋土的抗剪强度试验研究

Test and Research on the Shear Strength of Fiber Reinforced Soil under Freezing and Thawing Action

为研究冻融作用对纤维加筋土抗剪能力的影响,以粉质黏土为研究对象,进行了直剪试验和正交试验设计。试验结果表明:冻融次数的增加会减小纤维土的抗剪能力,纤维长度和纤维掺量对纤维土的抗剪能力提高存在一个最佳值,为纤维长度9mm、纤维掺量0.2%,纤维能够在一定程度上提高冻融条件下土的抗剪能力。

In order to study the effects of freezing and thawing on the shear strength of fiber reinforced soil, the silty clay is taken as the research object to conduct shear tests and orthogonal test in the paper. The results show that： increase of freezing and thawing times will reduce shear capacity of fiber soil, there is an optimum value for the impact of fiber length and fiber contents on the improve of shear capacity of fiber soil, which is fiber length being 9 mm and fiber content being 0.2 %, and to some extent the fiber can improve the shear capacity of soil under freeze thawing conditions.