摘要
通过CBR试验对土工合成材料加固路基粉质粘土的效果进行了研究,探讨了土工合成材料类型和层数对CBR的影响,获取了各种材料加固的最佳位置。结果表明,土工合成材料可以有效提高粉质粘土的CBR,当采用单层土工合成材料加固时,CBR增加5%~60%,当用双层土工合成材料加固时,CBR增加112%~325%,增加量取决于土工格栅设置的位置和类型;为获得最大的CBR提升效果,塑料土工格栅网格加固应放置在试样的0.3H^0.36H之间,而对于玻纤土工格栅和土工网,最佳加固位置位于0.41H^0.62H之间。
The effects of geosynthetic materials on subgrade silty clay reinforcement were studied by CBR tests,and the influence of the types and layers of geosynthetic materials on CBR was discussed.The optimal reinforcement positions of different geosynthetic materials were acquired.The results show that geosynthetic materials can effectively improve the CBR of silty clay.In general,CBR will increase 5%~60%under single-layer reinforcement condition,while CBR will increase 112%~325%under double-layer reinforcement condition.The increase amount depends on reinforcement position and geosynthetic material type.In order to achieve the maximum CBR improving effect,the reinforcement of the plastic geogrid should be placed between 0.3 H and 0.36 H of the specimen.For glasgrid and geonet,the optimum reinforcement position is between 0.41H^0.62H.
作者
张晓军
ZHANG Xiaojun(Hunan Communication Research Institute Co.Ltd.,Changsha,Hunan 410015,China)
出处
《公路工程》
北大核心
2020年第1期168-172,194,共6页
Highway Engineering
基金
湖南省交通科技项目(201412)
关键词
土工合成材料
CBR试验
加固比
最佳加固位置
subgrade
geosynthetic materials
CBR test
strengthening ratio
optimum reinforcement position
