Numerical Simulation Analysis of Soft Foundation Treatment in Slope Foot Area of Mirador Copper Mine
There is a large thick clay layer deposited at the foot of the slope of the dump of Mirador Copper Mine,which is prone to the phenomenon of floor heave sliding.According to the Terzaghi seepage consolidation theory,the consolidation degree of soft foundation can be improved by preloading and drain-age of gravel piles.The Boussinesq stress calculation method is used to simulate the loading and drainage process of soft foundation.A total of 5 levels of reactor discharge and a simulation period of 120 days are set to study the variation law of settlement,pressure and consolidation degree with the loading time and depth in the treatment process.The results show that the instantaneous settlement mainly occurs in the loading pe-riod,the consolidation settlement accumulates continuously in the whole loading process,and the consoli-dation settlement is greater than the instantaneous settlement,and the total settlement decreases with the depth.The excess pore water pressure appears in the loading period,but dissipates in the static period,re-sulting in the increase of effective stress in the whole loading process.The degree of consolidation increases rapidly in the early stage of loading,decreases in the period of loading,slowly increases in the late stage of loading,and decreases with the increase of soft foundation depth.
soft foundationpreloadingpore water pressureconsolidation degree
万方数据
维普
