摘要
剑麻纤维作为一种常见的天然纤维,因其具有强度高、价格低廉等优点,常被应用到土体改良当中。本文通过对剑麻纤维改良土进行无侧限抗压强度试验,研究了加筋率与含水率对加筋黏土的抗压强度特性与变形破坏规律的影响。试验结果表明:剑麻纤维对于黏土抗压强度有显著的增强作用,随加筋率的升高,改良土体的抗压强度逐渐增大。均匀分布在土颗粒间的剑麻纤维,能够形成空间网状结构,土颗粒与剑麻纤维相互连接缠绕,增加了土体间的连接力,使得加筋土的强度增大,且剑麻纤维能够起到一定的限制变形作用,从而试样的破坏形式由脆性破坏逐渐转变为塑性破坏。
As a common natural fiber,sisal fiber is widely used in soil stabilization because of its high strength,low price and etc.Through carrying out the unconfined compressive strength tests on the clay reinforced by sisal fiber,the compressive strength characteristics and failure forms of the specimens with different fiber and water contents are studied.The test results show that the incorporation of sisal fiber has positive effect on the soil compressive strength,that is the compressive strength of the specimen increases with more fibers incorporated.The evenly distributed sisal fiber can form a spatial network structure and better interact with adjacent soil particles by twining and connection,thereby increase soil-fiber interfacial forces and contribute to soil strength.Moreover,sisal fiber plays an important role in limiting the deformation,so that the failure form of the sample gradually changes from brittle failure to plastic failure.
出处
《工程勘察》
2021年第5期1-5,10,共6页
Geotechnical Investigation & Surveying
基金
国家自然科学基金面上项目(41877212)。
