Author(s): LI Yong-jing, XING Yang, HAN Jun-jun, CAO Shuang, School of Civil Engineering and Transportation, Liaoning Technical University
Pages: 43-49
Year: 2014 Issue:  12
Journal: Journal of Highway and Transportation Research and Development
Keyword:  road engineering; subsidence deformation; dynamic triaxial test; coal gangue; subgrade stability;
Abstract: Based on laboratory dynamic triaxial tests,the seismic subsidence deformation characteristics of coal gangue subgrade under cyclic dynamic loads are studied. The formula of coal gangue’s seismic subsidence considering the confining pressure and dynamic stress is established based on experimental result.The seismic response characteristics of coal gangue subgrade are analysed by using the finite difference program. The result shows that( 1) the relationship between the logarithm of coal gangue’s cumulated axial strain of and amplitude of dynamic loads is linear;( 2) the shoulder would appear shear zone and landslide under random seismic load,which would be more seriously when the strength of earthquake swells;( 3) the residual deformation of pavement is large at outside and small at middle,which is different from subsidence deformation of pavement under dynamic load of vehicle. The result could provide a reference for seismic design of coal gangue subgrade.