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首页> 外文期刊>Review of Agricultural Entomology >Effect of Coir Fiber on the Stress-Strain Behavior of a Reconstituted Fine-Grained Soil
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Effect of Coir Fiber on the Stress-Strain Behavior of a Reconstituted Fine-Grained Soil

机译：椰壳纤维对再生细粒土应力应变行为的影响

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The heterogeneous nature of the soil poses great challenge as well as opportunity to geotechnical engineers all over the world. As the availability of good sites is becoming difficult, active research is going on throughout the world to improve the engineering properties of the soft soils. Among all the ground improvement techniques, the soil reinforcement is emerging as an attractive alternative. Addition of natural fiber to the soil is a very good soil-reinforcement technique in the context of sustainable development. Coir fiber can be effectively used to tackle many short-term stability issues in geotechnical engineering related to shear strength, permeability, etc. In the present study, comprehensive experimental work has been conducted to investigate the effect of coir fiber on the stress-strain characteristics of a reconstituted cohesive soil. Laboratory model studies are conducted to study the effect of length and amount of fiber on the shear strength of soil. Tests were carried out using fiber contents varying in the range of 1.5%-2% by dry weight of the soil. The unconfined compressive strength of soil is significantly increased when coir fiber is added to it. The increase is directly proportional to the quantity of the fiber used. The peak compressive strength of the fiber-reinforced soil with 1.5% fiber content is more than twice that of the un-reinforced soil. Mixing of fiber of length 15 mm is found beneficial from laboratory experiments on 38-mm (diameter) × 76-mm (height) samples. Triaxial compression tests results showed that the fiber content in the range of 1.5%-2% is highly beneficial to enhance and strength of the fine-grained soil. Also, it is observed that peak deviator stress increases with increase in fiber content for all confining pressures. A remarkable increase in cohesion and friction angle values has been observed with the addition of fiber, and they increases nonlinearly with the fiber content. Moreover, the stiffness and ductility of the soil are quite improved with the use of natural fiber.
机译：土壤的异质性给世界各地的岩土工程师带来了巨大的挑战和机遇。随着良好地点的可用性变得越来越困难，全世界正在进行积极的研究以改善软土的工程特性。在所有的地面改良技术中，土壤加固正在成为一种有吸引力的替代方法。在可持续发展的背景下，向土壤中添加天然纤维是一种非常好的土壤加固技术。椰壳纤维可以有效地解决岩土工程中许多与剪切强度，渗透性等有关的短期稳定性问题。在本研究中，已经进行了全面的实验工作，以研究椰壳纤维对应力应变特性的影响。重建的粘性土壤。进行了实验室模型研究，以研究纤维的长度和数量对土壤剪切强度的影响。使用纤维含量在土壤干重的1.5％-2％范围内变化的纤维进行测试。添加椰壳纤维后，土壤的无限制抗压强度会大大提高。增加量与所使用的纤维量成正比。纤维含量为1.5％的纤维增强土壤的峰值抗压强度是未增强土壤的峰值抗压强度的两倍以上。通过对38毫米（直径）×76毫米（高度）的样本进行实验室实验，发现混合长度为15毫米的纤维是有益的。三轴压缩试验结果表明，纤维含量在1.5％-2％范围内对增强细粒土壤的强度和强度非常有利。同样，在所有围压下，随着纤维含量的增加，峰值偏应力也会增加。随着纤维的加入，内聚力和摩擦角值显着增加，并且随纤维含量的增加而非线性增加。此外，使用天然纤维可以大大改善土壤的硬度和延展性。

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