With the rapid development of China's economic development, more and more transportation infrastructure construction, the construction of railways and highways in many places will inevitably pass through the goaf, and the foundation of the goaf cannot be avoided, or an avoidance plan is adopted The problem of roof stability in the mined-out area has become increasingly prominent as an unfavorable geological problem in railway construction when the land is occupied and the cost is relatively high. This study explored the foundation activation deformation and environmental restoration treatment of the mined-out area under the action of high-speed railway cyclic dynamic loads. This study divides the load values into 10N, 20N, 30N, 40N, 50N, and 60N. When the load is 50N, the maximum rate of soil settlement on the top of the cap is 90%. When the load is 60N, the soil settlement between the piles under the cap is 85%. Because the parameter reduction is the range ratio reduction, the reduction ratio needs to be determined according to the actual deformation of the project. The surface subsidence in the study area is 0.7m, and the reduction ratio when the surface subsidence is 0.7m is determined by three-dimensional numerical simulation. Control the characteristics of the soil surface humidity before the start of the experiment, and avoid the selected goaf zone because the surface humidity is inconsistent, which ultimately leads to a large difference in the experimental results. The experimental results show that with the increase of the load, the soil settlement between the top of the cap and the pile below the cap is gradually increasing: although the settlement is slightly different everywhere, the difference is very small. It can be seen that the platform is a rigid platform, under the load, the overall force, overall settlement, as the embankment load increases, the settlement curve changes from steep to slow, and eventually tends to grow steadily.

Sahil Kavita. Foundation Activation Deformation and Environmental Restoration of Goaf under Cyclic Dynamic Load of High-speed Railway. International Journal of Engineering Technology and Construction (2023), Vol. 4, Issue 1: 65-77. https://doi.org/10.38007/IJETC.2023.040105.

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