CRTSⅡ型板式无砟轨道支承层斜裂病害整治效果评价

Evaluation on Inclined Crack Damage Treatment Effect of Support Layer of CRTSⅡSlab Ballastless Track

针对采用常规方法难以对CRTSⅡ型板式无砟轨道支承层斜裂病害整治的安全性和有效性进行评价的问题,基于无损、高效、准确的原则提出了一种针对运营期无砟轨道支承层斜裂病害整治效果快速评价技术。通过实时监测整治过程中的列车运行安全性参数、支承层伤损区域轨道板稳定性参数及轨道结构振动参数等轨道动力学安全参数,评价整治技术的安全性。采用弹性波法对整治前后支承层与砂浆层结合状态进行无损检测,评价整治技术的有效性。将该技术应用于某CRTSⅡ型板式无砟轨道支承层斜裂病害整治工程。结果显示:支承层伤损整治过程中实时监测轨道动力学安全参数,可以为线路安全稳定提供数据支撑,确保列车安全运行;采用弹性波法可实现天窗内支承层伤损整治效果的快速准确评价,检测效率、精度及有效性满足需求。

Aiming at the problem that it is difficult to evaluate the safety and effectiveness of inclined crack damage treatment by conventional methods used in support layer of CRTSⅡslab ballastless track,based on the principle of nondestructive,efficient and accurate,a rapid evaluation technology for inclined crack damage treatment effect of support layer of ballastless track in operation period was proposed.Through real-time monitoring of the safety parameters of train operation,the stability parameters of the track slab in the damaged area of the support layer and the vibration parameters of the track structure,the safety of the treatment technology was evaluated.The elastic wave method was used to detect the bonding state of the support layer and the mortar layer before and after the treatment,and evaluate the effectiveness of the treatment technology.The technology was applied in the treatment project of inclined crack in support layer of CRTSⅡslab ballastless track.The results show that the real-time monitoring of track dynamic safety parameters in the treatment process of damaged support layer can provide data support for the safety and stability of the railway and ensure the safe operation of the train.The elastic wave method can realize the rapid and accurate evaluation of the treatment effect of damaged support layer in the maintenance time,and the detection efficiency,accuracy and effectiveness meet the requirements.