棕榈纤维加固黏土无侧限抗压强度试验研究

采用天然棕榈纤维加固黏土，通过一系列无侧限抗压强度试验，对不同加筋率和土体密度条件下棕榈纤维加筋黏土的抗压强度特性进行试验研究，并对其加固机理进行较为深入的分析。试验结果表明：棕榈纤维可以在很大程度上提高黏土的抗压强度特性。当含水率和土体密度恒定时，加筋黏土的抗压强度随加筋率增加而不断增加；当含水率与加筋率恒定时，加筋黏土的抗压强度随土体密度增大而不断增大。这是由于棕榈纤维与土颗粒交织错列，形成空间网状结构，同时棕榈纤维与土体加筋过程中产生的弯曲变形，可以有效地促进土颗粒之间的紧密接触，从而阻挡土体位移，提高土体强度。

Research on Unconfined Compressive Strength of the Clay Reinforced by Palm Fiber

In this paper, natural palm fiber was used to reinforce clay. Through a series of unconfined compressive strength tests, the compressive strength characteristics of palm fiber reinforced clay at different rates of reinforcement and soil density were studied experimentally, and the reinforcement mechanism was analyzed profoundly. The results show that palm fiber can improve the compressive strength of clay to a large degree. When water content and soil density are constant, the compressive strength of reinforced clay increases with the increase of reinforcement ratio. When the moisture content and reinforcement ratio are constant, the compressive strength of reinforced clay increases with the increase of soil density. This can be attributed to that palm fiber and soil particles are interwoven and staggered to form a spatial network structure. At the same time, the bending deformation of palm fiber and soil in the process of the reinforcement can promote the close contact between the soil particles effectively, and consequently leading to the blocking of the soil displacement and improvement of the soil strength.