Study On Stability Of The Geogrid Reinforced Railway Embankment In Mining Subsidence Area

In the coal mining subsidence area,the embankment of coal gangue railway is strengthened by geogrid.Under different design and construction technology conditions,the stability of geogrid reinforced coal gangue embankment faces different problems.Based on the research of a railway embankment reinforcement project in Huainan,the influence of the influencing factors on the stability of the embankment under different working conditions is studied respectively under the conditions of different embankment slope and existing embankment slope.Based on the theoretical analysis of geogrid force,FLAC3 D numerical simulation,orthogonal test analysis and engineering application,the influencing factors of coal gangue geogrid embankment control are systematically studied.The results and conclusions of this paper are as follows:(1)The interface parameters between geogrid and coal gangue were obtained,and the distribution formula of geogrid drawing force was put forward.With the increase of the tensile force,the non-linear transmission of the tensile force along the geogrid is reduced,and the tension of the geogrid is mainly affected by the transmission coefficient b.(2)The stability of the embankment slope of the clay foundation is mainly controlled by the form of geogrid laying.The stability of the soft soil foundation slope is mainly controlled by the mechanical properties of the foundation soil.The stability of the embankment slope of the silty clay foundation is between the two..(3)Based on the influence of geogrid laying on the stability of embankment slope,a reasonable geogrid reinforcement is proposed and applied to engineering practice.