Universiti Teknologi MARA, Malaysia
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.
Cyclic Dynamic Load, Mined-Out Area, Foundation Activation Deformation, Environmental Restoration Treatment, Soil Settlement
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.
 Liu Z N. Accumulated Dynamic Strain Analysis of Heavy Load Railway Subgrade under Cyclic Loading. Journal of Railway Engineering Society, 2018, 35(3):7-11.
 Luiz álvaro Oliveira Júnior, Daniel Lima Araújo, Debs M K E, et al. Precast Beam–Column Connection Subjected to Cyclic and Dynamic Loadings. Structural Engineering International, 2017, 27(1):114-126.
 Madhavi L G, Nandhi V A M. Static and cyclic load response of reinforced sand through large triaxial tests. Japanese Geotechnical Society Special Publication, 2016, 2(68):2342-2346.
 Ni J, Gu Z H, Yang X. Dynamic load computing model for inner hole broaching. Zhejiang Daxue Xuebao, 2017, 51(3):445-452.
 Li N, Long G, Fu Q, et al. Effects of Freeze and Cyclic Load on Impact Resistance of Filling Layer Self-Compacting Concrete (FLSCC). KSCE journal of civil engineering,2019, 23(7):2908-2918.
 Luo D, Su G, Zhang G. True-Triaxial Experimental Study on Mechanical Behaviours and Acoustic Emission Characteristics of Dynamically Induced Rock Failure. Rock Mechanics and Rock Engineering, 2020, 53(3):1205-1223.
 Du K, Tao M, Li X B, et al. Experimental Study of Slabbing and Rockburst Induced by True-Triaxial Unloading and Local Dynamic Disturbance. Rock Mechanics & Rock Engineering, 2016, 49(9):3437-3453.
 Shan S J, Chuan L Z, Ying L G, et al. Rheological characteristic of argillaceous weak intercalation under intermittent dynamic shear loads. journal of china coal society, 2017, 42(7):1724-1731.
 Pavlic V, Matesic L, Kvasnicka P. Numerical modelling of the NGI-DSS test and cyclic threshold shear strain for degradation in sand. Granular Matter, 2017, 19(2):37.
 Anisimov A V, Krokhin I A, Likhoded A I, et al. Dynamic loading and stress life analysis of permanent space station modules. Mechanics of Solids, 2016, 51(6):660-671.
 Liu X, Liu Y, He C, et al. Dynamic stability analysis of the bedding rock slope considering the vibration deterioration effect of the structural plane. Bulletin of engineering geology and the environment, 2018, 77(1):87-103.
 Huang Q, Huang H W, Ye B, et al. Dynamic response and long-term settlement of a metro tunnel in saturated clay due to moving train load. Soils & Foundations, 2017, 57(6):1059-1075.
 Karacali O. A New Perspective on Cyclic Loading Behavior Analysis of ATSP-Adjustable Telescopic Steel Prop S235GT Material Used in Structural Engineering. Acta Physica Polonica, 2016, 129(4):436-438.
 El Messiry M, Mohamed A. Analysis of cyclic load die forming for woven jute fabric 3D reinforcement polymeric composites. Journal of Industrial Textiles, 2018, 47(7):1681-1701.
 Kiptoo D, Aschrafi J, Kalumba D, et al. Laboratory Investigation of a Geosynthetic Reinforced Pavement Under Static and Dynamic Loading. Journal of testing and evaluation, 2017, 45(1):76-84.
 Zhang Z D, Li G Y. Experimental study on particle breakage behaviors of rockfill under cyclic loadings. Yantu Gongcheng Xuebao/chinese Journal of Geotechnical Engineering,2017, 39(8):1510-1516.
 Jamadin A, Ibrahim Z, Jumaat M Z, et al. Effect of High-cyclic Loads on Dynamic Response of Reinforced Concrete Slabs. Ksce Journal of Civil Engineering, 2019, 23(3):1293-1301.
 Matyunin V M, Orakhelashvili B M, Marchenkov A Y, et al. Static, Dynamic, and Cyclic Strength of Stud Metal in Large Hydraulic Units. Inorganic materials, 2016, 52(15):1520-1527.
 Arias J L, Inti S, Tandon V. Influence of Geocell Reinforcement on Bearing Capacity of Low-Volume Roads. Transportation in Developing Economies, 2020, 6(1):1-10.
 Pandya S, Sachan A. Experimental Studies on Effect of Load Repetition on Dynamic Characteristics of Saturated Ahmedabad Cohesive Soil. International Journal of Civil Engineering Transaction A Civil Engineering, 2019, 17(6):781-792.