花岗岩风化高液限土公路路基压实质量控制OA
Quality Control of Compaction for Highway Subgrade with High Liquid Limit Soil Induced by Granite Weathering
通过室内土工试验和现场碾压试验,研究某地区高液限土的工程特性及影响因素,分析高液限土路基的压实质量及控制措施.结果表明:高液限土具有高天然含水率、液限与塑限高、塑性指数大、强度较高(CBR≥3%)、粗颗粒含量分布宽(5%～30%)等特点,最大 CBR含水率较最佳含水率高约 6%;直接用作路堤填料的高液限土应同时满足 CBR、CBR膨胀量和施工性能的要求;路堤压实宜采用自重不超过 22 t的振动压路机,碾压含水率不应超过32%,碾压遍数宜为4遍,压实度控制标准不宜小于88%.
Through laboratory geotechnical tests and field compaction trials,this study investigated the engineering characteristics and influencing factors of high liquid limit soil in a certain region and analyzed the compaction quality and control measures for subgrade construction.The results show that,high liquid limit soil exhibits the following characteristics:high natural moisture content,high liquid limit and plastic limit,high plasticity index,relatively high strength(CBR≥3%),and a broad distribution of coarse particle content(5%-30%).The moisture content corresponding to maximum CBR is approximately 6%higher than the optimum moisture content.When directly used as embankment fill material,high liquid limit soil must simultaneously satisfy requirements for CBR,CBR swell,and workability.It is recommended to use a vibratory roller with a self-weight not exceeding 22 t for embankment compaction,with a compaction moisture content not exceeding 32%,a rolling pass count of 4 passes,and a compaction degree control standard no less than 88%.
冯宝库;宋常军
中交第三航务工程局有限公司厦门分公司,福建 厦门 361000交通运输部公路科学研究院,北京 100088
交通工程
公路工程路堤填料高液限土压实度含水率碾压遍数施工工艺质量控制
highway engineeringembankment fill materialhigh liquid limit soildegree of compactionwater contentnumber of rollers passesconstruction technologyquality control
《路基工程》 2026 (2)
29-35,7
西部交通建设科技项目计划(2013318223240)湖南省交通科技项目(202214)中国公路工程咨询集团有限公司科技研究开发计划课题(ZZJT-GLGS-JS-202102)
评论