Dynamic Response Analysis of Soil around Curve Section Tunnel under Train Vibration Load

To investigate the changes in soil dynamic response around tunnel periphery under vibration loads generated by train operation on curved sections, field measurements were carried out to observe void water pressure, level, and settlement ground. Additionally, simulation modeling using MIDAS was employed simulate analyze soil’s impact of loads. Based track stress diagram combined with axle weight train, transverse vertical are calculated. The corresponding parameters entered into load table MIDAS/GTS NX analysis module, so as tunnel. results show that application is an important reason for change pore pressure during operation. During initial stages operation, exhibits a significant increase, followed gradual decrease over time. overall variation follows seasonal pattern, increasing depth burial increases. closely related location. closer tunnel, more sensitive greater amplitude rate deformation soil. trend groundwater level basically consistent proportional depth. at bottom decreases increase turning radius. main influence range 0~15 m excess gradually dissipates, it can be predicted will not cause damage surrounding