Research on Key Deviation Sources of Floating Slab Track and Deviation Transmission Law of Foundation Construction Under Track

In the process of subway construction, the control of construction quality and accuracy is the core link. Deviation in the construction of a steel spring floating slab foundation under the rail can easily cause problems such as abnormal rail installation, insufficient adaptability of vibration isolators, and decreased vibration reduction performance, seriously threatening the safety of train operation and increasing maintenance difficulty. In view of this, this article addresses the issue of excessive deviation in the construction of a subway steel spring floating slab track, and systematically identifies the main types of spatial geometric deviations in each process. Based on on-site measured data, the distribution pattern and statistical characteristics of construction deviations in each process were revealed through data statistical methods, and the causes of deviations were analyzed. Based on the quantitative analysis of structural characteristics and deviation sources, a mathematical model of the underground foundation space was constructed using the spatial geometric transformation method. Combined with the process sequence relationship, a deviation transmission model for floating slab track construction was established, clarifying the deviation analysis process and providing theoretical support for subsequent research on construction correction.