用于填筑路堤加固的竹筋格栅力学性能

发布时间：2018-04-15 00:02

本文选题：慈竹 + 土工格栅　；参考：《岩土力学》2017年01期

【摘要】：为了研究慈竹土工格栅在四川巴中-南充高速公路填筑路堤加固应用中的可行性,通过新鲜慈竹的顺纹抗拉和弯曲试验统计分析了慈竹土工格栅的力学性能,将其与传统土工格栅的力学性能相比表明:慈竹土工格栅能满足规范对传统土工格栅的要求,可用于填筑路堤加固。根据力学性能试验结果,选取龄期2 a以上的慈竹作为该公路路堤的辅助加筋材料。通过室内直剪试验对慈竹加筋土的界面特性进行研究,确定了竹青和竹黄朝向间隔布置的竹片格栅相对较优,对应的界面摩擦系数能达到0.32:拉拔试验获得竹片与土的界面似摩擦系数能达到0.35。提供的慈竹土工格栅的编织工艺以及加筋填筑路堤的施工工艺能更好地为工程服务。
[Abstract]:In order to study the feasibility of the application of bamboo geogrid in embankment reinforcement of Bazhong Nanchong Expressway in Sichuan Province, the mechanical properties of the geogrid were analyzed statistically through the tensile and bending tests of fresh bamboo.Compared with the traditional geogrid, the mechanical properties of the geogrid show that the geogrid can meet the requirements of the code for the traditional geogrid and can be used to reinforce the embankment.According to the test results of mechanical properties, the bamboo with the age of more than 2 years was selected as the auxiliary reinforcement material of the highway embankment.The interfacial characteristics of the reinforced soil were studied by direct shear test in laboratory. It was determined that the bamboo grille with bamboo green and yellow orientation interval was relatively better.The corresponding friction coefficient can reach 0.32 and the similar friction coefficient between bamboo and soil can reach 0.35 by pull-out test.The braiding technology of the geogrid and the construction technology of reinforced embankment can better serve the project.
【作者单位】：四川大学水力学与山区河流保护国家重点实验室;
【基金】：国家重点基础研究发展规划项目(973计划)(No.2015CB057903) 教育部新世纪优秀人才项目(No.NCET-13-0382)~~
【分类号】：U416.12

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