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The essence of slab track damage under the coupling effect of train load and water is a coupled hydro-mechanical (HM) fracture, and the core technology is the water pressure calculation. Finite element software ANSYS and CFX are used to analyze the water pressure and speed of slab track cracks under high speed train loads. The results show that, the maximum water pressure appears at the crack tip under loading, and decreases along the crack. The value of water pressure is proportional to loaddoi:10.12783/dtetr/ecar2018/26346 fatcat:nhev5jguxzeevboyiq2e2xwi44