低液限粉质黏土公路路基压实控制指标的对比优化  

Comparison and Optimization of Compaction Control Indexes of Low Liquid Limit Silty Clay Highway Subgrade

作　　者：刘富晓 LIU Fuxiao(Huizhou Xinda Construction Engineering Testing Co.Ltd.,Huizhou 516001,China)

机构地区：[1]惠州市鑫达建筑工程检测有限公司,惠州516001

出　　处：《武汉理工大学学报（交通科学与工程版）》2023年第5期947-951,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

摘　　要：本文研究了低液限粉质黏土路基压实中压实度K与振动压实值VCV、地基系数K 30和动态变形模量E vd之间的相关性,在此基础上优化了压实状态的控制指标.结果表明,随着压实遍数的增加,K-VCV,K-K 30,K-E vd之间线性拟合式的斜率下降,截距上升,且相关系数增加,较好的线性关系有利于基于VCV、K 30或E vd指标对路基压实状态进行评价与控制.压实完成后,采用VCV、K 30、E vd三项力学响应指标评价低液限粉质黏土路基压实状态的一致性较好,据此优化了对低液限粉质黏土路基中上、下路床与上、下路堤压实状态的控制要求.The correlation between compaction degree K and vibration compaction value VCV,foundation coefficient K 30 and dynamic deformation modulus E vd in low liquid limit silty clay subgrade compaction was studied,and the control index of compaction state was optimized.The results show that with the increase of compaction times,the slope k of the linear fitting formula among K-VCV,K-K 30 and K-E vd decreases,the intercept b increases,and the correlation coefficient increases.A good linear relationship is conducive to the evaluation and control of subgrade compaction state based on VCV,K30 or Evd indicators.After the compaction was completed,three mechanical response indexes,VCV,K 30 and E vd,were used to evaluate the compaction state of low liquid limit silty clay subgrade,and the control requirements for the compaction state of upper and lower roadbed and upper and lower embankment in low liquid limit silty clay subgrade were optimized accordingly.

关 键 词：低液限粉质黏土 公路路基 压实度 地基系数 动态变形模量 

分 类 号：U416.1[交通运输工程—道路与铁道工程]