既有线铁路路基密实状态检测方法研究

Research on Test of the Dense State of Existing Railway Subgrade

针对现行既有线铁路路基检测中存在的技术缺陷,提出既有线路基检测新方法—可变能量贯入测试法,通过检测贯入阻力评价既有路基密实状态,达到不干扰行车、检测深度大、数据准确直观的目的。同时通过理论分析及现场对比试验研究,论证了采用可变能量贯入测试法检测贯入阻力评价铁路路基密实状态的可行性,并提出适于既有路基密实状态检测的建议标准。该成果的研究对优化我国既有线检测方法,保障行车安全具有积极意义。

The article puts forward new methods for the testing of the existing subgrade in light of the defects of the current technology.That is the evaluation of subgrade condition by detecting the penetration resistance.It has the following charac-teristics:no interference with traffic,large testing depth,and accurate data.Theoretic analysis and contrastive experiments show the feasibility of variable energy penetration method and put forward standards for the testing of the existing subgrade. The method will play a positive role in the optimization of testing method and safe driving.