Passenger dedicated railway lines in the southwestern mountainous area have the characteristics of a high bridge tunnel ratio,complex and harsh geological conditions along the line,and is prone to various engineering defects during construction and operation.Based on the deformation defect of a certain tunnel's bottom drum,this article has designed and implemented a tunnel deformation monitoring plan that includes three monitoring indicators:rock deformation,inverted arch stress,and the settlement deformation of road bed plates.By analyzing monitoring data,the evolution principles of tunnel and surrounding rock stress deformation is obtained,and based on this,it proposes disposal measures such as the subsequent encryption of track geometry static and dynamic detection and lining structures through crack observation,the implementation of train speed reduction operation measures,etc.The relevant research could provide powerful safeguards for the safe operation of this dedicated passenger line,and also provide useful references for the monitoring and remediation of tunnel defects in similar engineering projects.
维普
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