|
|
|
| Impact of Load Amplitude on the Water Pressure of Non-ballasted Track Structure |
| XU Gui-hong, YANG Rong-shan, LIU Xue-yi#br# |
1. Guizhou Institute of Technology, Guizhou, Guiyang 550003, China; 2. MOE Key Laboratory of High-speed Railway Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, China)
|
|
|
|
Abstract Abstract：Research purposes：Cracks-water pressure calculation model under the dynamical load and water action was established to understand the distribution of internal water pressure in cracks. In order to verify the validity of the model, pouring a model specimen with cracks, using universal servo-hydraulic machine production cycle dynamic load，high sensitivity sensor is used to measure water pressure inside the cracks. It analyzed the cracks water pressure amplitude variation with load characteristics. Cracks-water pressure calculation model was used to calculate the water pressure, when the train speed is 250 km/h as example.
Research conclusions：The results show that:（1） With increasing cyclic loading (45±20 ~ 70±45 kN) , the water pressure of the measuring points inside the crack is also increasing. （2）Established the theoretical model and its condition is consistent with the experimental conditions, and it proves that the theoretical model is correct by experimental data and theoretical calculation results comparative analysis. （3）Using cracks-water pressure calculation model， cracks water pressure is calculated when the train speed is 250 km/h, the crack opening size, width, depth profiling were 3 mm, 1 m, 1 m. the water pressure of control point in the cracks increases with the increasing of train loads is a linear relationship. （4）The research results provide a theoretical references for analysis of non-ballasted track construction injury.
|
|
|
|
|
|
|
|
|
