高速铁路路基智能压实与检测技术研究

Research on Intelligent Compaction and Detection Technology of High-speed Railway Subgrade

本文在京滨城际铁路北辰站开展了现场路基连续压实检测试验,探讨振动轮与填料表面加速度特征,同时对能量压实值CEV的适用性进行研究。研究结果表明,碾压过程中振动轮上的加速度时程数据较为稳定,地面加速度数据的基波频率与振动压路机的弱振模式频率一致。通过相关性分析,CEV与常规检测指标的相关系数≥0.7,表明CEV整体上的稳定性、抗干扰能力与精准度皆优于CMV,更适用于A组、B组粗颗粒填料的压实度检测。

This paper carries out on-site continuous compaction detection of subgrade conducted at Beichen Station of Beijing-Binhai Intercity Railway,to explore the acceleration characteristics of the vibrating wheel and the filler surface,and investigates the applicability of the Compaction Energy Value(CEV).The research findings indicate that the acceleration time history data recorded from the vibrating wheel during the rolling process is relatively stable,and the fundamental wave frequency of the ground acceleration data is consistent with the soft vibration mode frequency of the roller.Through correlation analysis,the correlation coefficients between CEV and conventional testing indicators are all≥0.7,suggesting that CEV is better than CMV in overall stability,anti-interference ability and accuracy,thereby making it a more suitable tool for compaction testing of group A,group B coarse-grained fill.