Strength and Stiffness Response of ItanagarSoil Reinforced with Jute Fiber
Strength and Stiffness Response of ItanagarSoil Reinforced with Jute Fiber
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黄麻纤维加固 Itanagar 土的强度和刚度响应
DOI：
10.15680/ijirset.2014.0310034
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发表时间：
2014
期刊：
影响因子：
--
通讯作者：
M. Bagra
中科院分区：
文献类型：
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作者：
H. Singh;M. Bagra
随机分布纤维加固技术已成功应用于多种应用，如边坡稳定、道路路基和底基层等。这是一种相对简单的地基改良技术，具有作为许多岩土工程问题的经济高效解决方案的巨大潜力。考虑到这一点，我们进行了本研究。在这项研究中，对当地（印度阿鲁纳恰尔邦伊塔那加尔）不含和含有黄麻纤维的土壤进行了一系列不同围压下的三轴压缩试验。黄麻纤维占土壤干重的百分比分别为0.25%、0.5%、0.75和1%，随机与土壤混合。用于三轴试验的未加筋土和加筋土样均按照最佳含水量对应的最大干密度制备。每种纤维含量对应的土体的抗剪强度参数（c 和 I）和刚度模量（Id /Iμ，即偏应力与相应应变的比值）在 NERIST 岩土工程实验室测定。还研究了纤维直径变化的影响。测试结果表明，加入黄麻纤维后，土壤的剪切强度参数（c 和 I）和刚度模量（Id /Iµ）均有所增加。还观察到，随着黄麻纤维百分比的增加，这些参数进一步增加，并且在纤维含量为 1% 时增加显着。进一步观察到，纤维直径的变化影响这些强度参数，并且它们随着纤维直径的增加而增加。因此，由于黄麻纤维，土壤的剪切强度参数和刚度模量显着增加，这将大大增加承载能力并显着降低土壤的直接沉降值
Randomly distributed fiber reinforcement technique has successfully been used in a variety of applications such as slope stabilization, road subgrade and sub base etc. This is a relatively simple technique for ground improvement and has tremendous potential as a cost effective solution to many geotechnical problem. Keeping this in view the present study was taken up. In this study a series of triaxial compression tests under different confining pressures were conducted on locally available (Itanagar, Arunachal Pradesh, India) soil without and with Jute Fiber. The percentage of Jute fiber by dry weight of soil was taken as 0.25 %, 0.5 %, 0.75 and 1 % and they were randomly mixed with the soil. The soil samples of unreinforced and reinforced soil for triaxial tests were prepared at maximum dry density corresponding to optimum water content The shear strength parameters (c and I) and stiffness modulus (Id /Iµ i.e. ratio of deviator stress to corresponding strain) of soil corresponding to each fiber content was determined in the geotechnical engineering laboratory of NERIST. The effect of change in diameter of fiber was also investigated. Tests results indicate that on inclusion of Jute fiber, the shear strength parameters (c and I) and stiffness modulus (Id /Iµ) of soil are increases. It was also observed that on increasing the percentage of Jute fiber, these parameters are further increases and the increase is substantial at fiber contents of 1 %. It was further observed that the change in diameter of fiber affects these strength parameters and they increase with the increase in diameter of fiber. Thus there is a significant increase in shear strength parameters and stiffness modulus of soil due to Jute fiber and this will considerably increase the load carrying capacity and reduce the value of immediate settlement of soil significantly