大面积高填方红黏土地基强夯处理现场试验研究  

Field test on dynamic compaction treatment of large area high-fill red clay foundation

作　　者：王帮团 杨龙 刘文连 肖海东 眭素刚 周艳飞 徐鹏飞 Wang Bangtuan;Yang Long;Liu Wenlian;Xiao Haidong;Sui Sugang;Zhou Yanfei;Xu Pengfei(Kunming Prospecting Design Institute of China Nonferrous Metals Industry Co.,Ltd.,Kunming 650051,Yunnan,China;Yun-nan Key Laboratory of Geotechnical Engineering and Geohazards,Kunming 650218,Yunnan,China;Yunnan Construction and In-vestment Holding Group Co.,Ltd.,Kunming 650500,Yunnan,China)

机构地区：[1]中国有色金属工业昆明勘察设计研究院有限公司,云南昆明650051 [2]云南省岩土工程与地质灾害重点实验室,云南昆明650218 [3]云南省建设投资控股集团有限公司,云南昆明650500

出　　处：《岩土工程技术》2025年第2期247-253,共7页Geotechnical Engineering Technique

基　　金：云南省科技计划项目(202105AG070006)。

摘　　要：以云南碳中和示范产业园基础设施建设项目大面积高填方工程为研究背景,针对红黏土回填地基填筑工艺及强夯处理效果开展试验研究。试验结果表明,在5000 kN·m能级工况下,强夯法处理红黏土采用土石分层堆填地基效果显著,4种填筑工况中,工况2(采用石料粒径≤300 mm、土石体积比5∶5的土石分层堆填)的地基强夯加固效果最优,地基承载力特征值可达240 kPa以上,变形模量大于14 MPa。根据本次强夯试验测试结果,结合云南地区强夯地基处理工程经验,对本地区红黏土回填地基强夯处理施工提出了具体建议。试验研究成果可为类似大面积高填方红黏土回填地基的设计与施工提供借鉴。Taking the large-scale high-fill engineering of the infrastructure construction project of Yunnan Carbon Neutral Demonstration Industrial Park as the research background,experimental research was conducted on the filling process and dynamic compaction treatment effect of the red clay backfill foundation.The experimental results show that under the energy level of 5000 kN·m,the dynamic compaction method has significant effects on treating the red clay soil-rock layered fill foundation.Among the four filling conditions,condition 2(using soil-rock layered fill with stone particle size≤300 mm and soil-rock volume ratio of 5∶5)has the best dynamic compaction reinforcement effect on the foundation,with a characteristic value of foundation bearing capacity of over 240 kPa and a deformation modulus of more than 14 MPa.Based on the test results of this experiment and combined with the experience in Yunnan,specific suggestions for the construction of red clay backfill foundation dynamic compaction treatment in this region are pro-posed.The experimental research results can provide a reference for the design and construction of similar large-scale high-fill red clay backfill foundations.

关 键 词：高填方地基 红黏土 填筑工艺 强夯处理 

分 类 号：TU472[建筑科学—结构工程]