Study on Dynamic Stability of Aeolian Sand Subgrade Based on Field In-Situ Vibration Test
Based on eolian sand subgrade works of Menghua Railway MHTJ-1 section,six sections of eolian sand subgrade are selected as the testing sections.Dynamic stress on the subgrade under train load is simulated by adjusting the drop distance and acting time of the hammer of high-speed hydraulic rammer.The subgrade is equipped with dynamic soil pressure box,accelerator and other sensors so as to gather such parameters as dynamic displacement,cumulative displacement,vibration acceleration,vibration velocity and dynamic stress of the subgrade.In addition,the dynamic response is obtained through in-situ vibration test of the subgrade,and the dynamic stability of eolian sand subgrade is evaluated,which will provide technical reference for similar projects.
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