Study Of Vibration Influence On Gas Pipeline Under Inter-City Rail Transit

With the continuous economic development and the progresses of urbanization and modernization, urban traffic problems have become a increasingly prominent problem, so the development of underground resources has become an inevitable choice for many cities development. However, long-term vibration of subway trains inevitably have an influence on the surrounding environment and buildings, how to accurately predict the impact of the train running on the surrounding environment, and to make a reasonable evaluation of the impact, it is particularly important. In this thesis, considering the city rail transit project of the Dongguan to Huizhou through gas pipeline project as the research object, and analyzed the impact of vibration during operation, and put forward the corresponding control measures. The main results are as follows:1. According to the actual situation of the proposed project, the paper select the most unfavorable conditions to determine the model geometry and physical and mechanical parameters of the worst operating conditions, and establish a three-dimensional finite element model including track, tunnel structure, soil and pipes through ANSYS.2. Taking rail fastening reaction force as an input load, this article have research vibration response of the gas pipeline on the train operating conditions. The results show that:Vibration of gas pipeline increases with the increasing speed increases, When the operating speed of 200 km/h, the maximum vibration acceleration of the gas pipeline is 1.17×10-3m/s2. If the pipeline beneath the train will significantly increase the scope of the vibration of gas pipeline, its acceleration amplitude displacement and acceleration amplitude increases of 84% and 76%, the maximum displacement of 2.2 × 10-5m, maximum vibration acceleration is 0.0021m/s2.3. This thesis establish a train vibration intensity scale, according to the results, this project have no vibration effect on gas pipeline beneath the train when running, it can guarantee the normal operation of the pipeline.