基于各种全尺寸现场安装试验的土工合成增强材料安装损伤减小系数

IF 0.4 Q4 ENGINEERING, GEOLOGICAL
S. Cho, K. Lee
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引用次数: 0

摘要

为了研究安装损伤的影响,采用15种不同粒径分布的土工合成增强材料和填充材料进行了各种尺寸的现场安装试验。根据FHWA(2009)指南进行了全面的现场安装测试。对开挖的土工合成增强材进行填土压实后的抗拉强度试验,随机抽取20个试件进行试验,并根据试验结果分析了压实对增强材抗拉强度的降低程度。研究发现,填土材料压实对土工合成增强材料抗拉强度降低的程度受增强材料类型和填土材料最大直径的影响较大。此外,还发现刚度相对较小的PET土工格栅(PVC涂层)强度折减比最大,填充材料的最大粒径越大,强度折减比越大。同时,根据本研究的全尺寸现场安装试验结果和已有的试验结果,提出了一种较为合理的土工合成钢筋安装减损系数的评价方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Installation Damage Reduction Factor for Geosynthetics Reinforcements Based on Various Full-Scale Field Installation Tests
In this paper, to investigate the influence of installation damage, a variety of full-scale field installation tests with 15 geosynthetics reinforcements and fill materials of various grain size distribution have been performed. The full-scale field installation test was conducted with reference to the FHWA (2009) guidelines. The tensile strength tests were performed by sampling up to 20 specimens randomly from the excavated geosynthetics reinforcements after compaction of fill material, and the degree of decrease in tensile strength of reinforcements due to compaction was analyzed based on the experiment results. It was found that the degree of tensile strength reduction of geosynthetics reinforcements due to the compaction of fill material is greatly influenced by the type of reinforcement and the maximum diameter of fill material. In addition, it was found that the strength reduction ratio of PET geogrid (PVC coating) with relatively small stiffness was greatest, and that the larger the maximum grain size of the fill material, the greater the strength reduction ratio. And also, a more reasonable evaluation method for the installation damage reduction factor of geosynthetics reinforcements is proposed based on the results of full-scale field installation tests in present study and the existing test results.
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