掺砂改良高液限土路基施工质量控制试验研究  

Experimental Study on Quality Control of High Liquid Limit Soil Subgrade Construction Improved by Sand Mixed

作　　者：曹鑫宝 CAO Xinbao(The 5th Engineering Co.,LTD.,China Railway 18th Bureau Group,Tianjin 300450,China)

机构地区：[1]中铁十八局集团第五工程有限公司,天津300450

出　　处：《长春工程学院学报（自然科学版）》2023年第2期49-52,共4页Journal of Changchun Institute of Technology：Natural Sciences Edition

摘　　要：为提升高液限土路基的稳定性,保证施工质量,通过对掺砂改良的高液限土进行CBR试验和击实试验,实现对掺砂改良高液限土路基施工的质量控制。研究结果显示,在高液限黏土内分别添加含量为12%、14%、16%和18%的中粗砂并用其铺设土路基后,可有效提升土路基CBR数值;中粗砂的添加含量为18%的改良高液限黏土的CBR数值最大、干密度数值最高、稳定性最好,同时其最佳含水率数值最低。In order to improve the stability of the high liquid limit soil subgrade and ensure construction quality,CBR tests and compaction tests are conducted on the high liquid limit soil improved with sand to achieve quality control of the construction of the high liquid limit soil subgrade improved with sand.The results show that adding 12%,14%,16%and 18%medium coarse sand to high liquid limit clay and using it to lay soil subgrade can effectively improve the CBR value of soil subgrade.The improved high liquid limit clay with an 18%content of medium coarse sand has the highest CBR value,highest dry density value,and best stability,while its optimal water content value is the lowest.

关 键 词：路基填料 高液限改良土 掺砂比 CBR值 干密度 含水率 施工控制 

分 类 号：TU443[建筑科学—岩土工程]